Registration No. 333-201935

Investment Company Act of 1940 File No. 811-23029

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

_________________

FORM N-1A

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933	X
Post-Effective Amendment No. 83	X

and/or

REGISTRATION STATEMENT

UNDER

THE INVESTMENT COMPANY ACT OF 1940	X
Amendment No. 85	X
(Check Appropriate Box or Boxes)

_________________

PRINCIPAL EXCHANGE-TRADED FUNDS

(Exact Name of Registrant as Specified in Charter)

_________________

711 High Street

Des Moines, IA 50392

(Address of Principal Executive Offices)

(515) 235-1209

(Registrant’s Telephone Number, including Area Code)

_________________

Name and Address of Agent for Service:

Britney L. Schnathorst

Principal Financial Group

Des Moines, IA 50392

_________________

Approximate Date of Proposed Public Offering: as soon as practicable after the effective date of this Registration Statement

It is proposed that this filing will become effective (check appropriate box)

____    immediately upon filing pursuant to paragraph (b)

_XX_    on April 8, 2019 pursuant to paragraph (b)

____    60 days after filing pursuant to paragraph (a)

____    on (date) pursuant to paragraph (a)

____    75 days after filing pursuant to paragraph (a)(2)

____    on (date) pursuant to paragraph (a)(2) of Rule 485

If appropriate, check the following box:

____ This post-effective amendment designates a new effective date for a previously filed post-effective amendment.

Title of Securities Being Registered: Shares of Principal Ultra-Short Active Income ETF.

EXPLANATORY NOTE

The Registrant is filing this amendment to add a new fund: Principal Ultra-Short Active Income ETF. The Amendment includes the following: (1) facing page; (2) Part A (prospectus for the new fund); (3) Part B (amended and restated statement of additional information that includes certain of Registrant's current series); (4) Part C; and (5) signature pages. This Amendment is not being filed to update or amend the prospectuses and statement of additional information for the Trust's other series.

PRINCIPAL EXCHANGE-TRADED FUNDS

The date of this Prospectus is April 8, 2019.

Fund	Ticker Symbol	Principal U.S. Listing Exchange
Principal Ultra-Short Active Income ETF	USI	NYSE Arca

Beginning on November 1, 2021, as permitted by regulations adopted by the Securities and Exchange Commission, paper copies of the Fund’s annual and semi-annual shareholder reports will no longer be sent by mail, unless you specifically request paper copies of the report from the Fund or your financial intermediary, such as a broker-dealer or bank. Instead, the reports will be made available on a website, and you will be notified by mail each time a report is posted and provided with a website link to access the report. If you already elected to receive such reports electronically, you will not be affected by this change and you do not need to take any action. If you have not previously elected electronic delivery, you may elect to receive reports and other communications from the Fund electronically by visiting our website at www.principalfunds.com/edelivery for instructions on enrolling in eDelivery or calling 800-222-5852. If you own these shares through a financial intermediary, you may contact your financial intermediary. You may elect to receive all future reports in paper free of charge. If you wish to continue receiving paper copies of your reports, you can inform the Fund by calling 800-222-5852. If you own these shares through a financial intermediary, you may contact your financial intermediary or follow instructions included with this disclosure to elect to continue to receive paper copies of reports. Your election to receive reports in paper will apply to all funds with the Fund complex or to the shares you own through your financial intermediary.

The Securities and Exchange Commission has not approved or disapproved these securities or passed upon the adequacy of this prospectus. Any representation to the contrary is a criminal offense.

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TABLE OF CONTENTS

FUND SUMMARY
PRINCIPAL ULTRA-SHORT ACTIVE INCOME ETF	4
ADDITIONAL INFORMATION ABOUT INVESTMENT STRATEGIES AND RISKS	7
PORTFOLIO HOLDINGS INFORMATION	15
MANAGEMENT OF THE FUND	16
DISTRIBUTOR AND OTHER FUND SERVICE PROVIDERS	17
PRICING OF FUND SHARES	17
PURCHASE AND SALE OF FUND SHARES	18
DIVIDENDS AND DISTRIBUTIONS	19
FREQUENT PURCHASES AND REDEMPTIONS	19
TAX CONSIDERATIONS	20
DISTRIBUTION PLANS AND INTERMEDIARY COMPENSATION	21
FUND ACCOUNT INFORMATION	21
APPENDIX A - DESCRIPTION OF BOND RATINGS	23
ADDITIONAL INFORMATION	26

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PRINCIPAL ULTRA-SHORT ACTIVE INCOME ETF

Objective : The Fund seeks to provide current income.

Fees and Expenses of the Fund:

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund ("Shares"). Investors may pay brokerage commissions on their purchases and sales of Shares, which are not reflected in the table or the example below.

Annual Fund Operating Expenses     

(expenses that you pay each year as a percentage of the value of your investment)

Management Fees	0.18%
Other Expenses	—%
Total Annual Fund Operating Expenses(1)	0.18%

⁽¹⁾  The investment management agreement (the “Management Agreement”) between the Fund and Principal Global Investors, LLC (“PGI”) provides that, for the duration of the Management Agreement, PGI will pay all operating expenses of the Fund, except for the Management Fee, payments made under each Series 12b-1 plan (if or when such fees are imposed), brokerage commissions and other expenses connected to the execution of portfolio transactions, interest expense, taxes, acquired fund fees and expenses, litigation expenses and other extraordinary expenses.

Example

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other funds.

The Example assumes that you invest $10,000 in the Fund for the time periods indicated. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

	1 year	3 years
Principal Ultra-Short Active Income ETF	$18	$58

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. This is a new fund and does not yet have a portfolio turnover rate to disclose.

Principal Investment Strategies

The Fund is an actively managed exchange-traded fund (“ETF”) that seeks to achieve its investment objective by investing, under normal circumstances, at least 80% of its net assets, plus any borrowings for investment purposes, in investment-grade bonds and other debt securities. "Investment grade” securities are rated at the time of purchase BBB- or higher by S&P Global Ratings ("S&P Global") or Baa3 or higher by Moody's Investors Service, Inc. ("Moody's") or, if unrated, of comparable quality in the opinion of those selecting such investments. If the security has been rated by only one of those agencies, that rating will determine whether the security is investment grade.

The Fund invests in fixed- and floating-rate securities. The Fund invests in foreign securities, corporate securities, securities issued by the U.S. and foreign governments and their agencies and instrumentalities, asset-backed securities (securitized products), and commercial paper. The Fund concentrates (invests more than 25% of its net assets) its investments in securities in the financial services (i.e., banking, insurance and commercial finance) industry.

Under normal circumstances, the Fund maintains an average effective maturity of three years or less and an average portfolio duration of one year or less. The Fund is not a money market fund and does not seek to maintain a stable net asset value of $1.00 per share. The Fund actively trades securities.

Principal Risks

The value of your investment in the Fund changes with the value of the Fund's investments. Many factors affect that value, and it is possible to lose money by investing in the Fund. An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. The principal risks of investing in the Fund, in alphabetical order, are:

Commercial Paper Risk . The value of the Fund’s investment in commercial paper, which is generally unsecured, is susceptible to changes in interest rates and the issuer’s financial condition or credit quality. Commercial paper is usually repaid at maturity by the issuer from the proceeds of the issuance of new commercial paper. As a result,

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investments in commercial paper are subject to the risk that the issuer cannot issue enough new commercial paper to satisfy its outstanding obligations. In addition, under certain circumstances commercial paper may become illiquid or may suffer from reduced liquidity.

Fixed-Income Securities Risk. Fixed-income securities are subject to interest rate, credit quality, and liquidity risks. The market value of fixed-income securities generally declines when interest rates rise, and generally increase when interest rates fall. Higher interest rates may adversely affect the liquidity of certain fixed income securities. Moreover, an issuer of fixed-income securities could default on its payment obligations due to increased interest rates or for other reasons.

Floating Interest Rate Risk.  Floating interest rates vary with and are periodically adjusted to reflect changes in a generally recognized base interest rate such as LIBOR (London Interbank Offered Rate) or the prime rate. Securities with floating or variable interest rates can be less sensitive to interest rate changes than securities with fixed interest rates, but may decline in value if their coupon rates do not reset as high, or as quickly, as comparable market interest rates, and generally carry lower yields than fixed notes of the same maturity. Although floating rate securities are less sensitive to interest rate risk than fixed-rate securities, they are subject to credit risk and default risk, which could impair their value.

Foreign Securities Risk. The risks of foreign securities include loss of value as a result of: political or economic instability; nationalization, expropriation or confiscatory taxation; settlement delays; and limited government regulation (including less stringent reporting, accounting, and disclosure standards than are required of U.S. companies).

Industry Concentration Risk. A fund that concentrates investments in a particular industry or group of industries has greater exposure than other funds to market, economic and other factors affecting that industry or group of industries.

• Financial Services. A fund concentrating in financial services companies may be more susceptible to adverse economic or regulatory occurrences affecting financial services companies. Financial companies may be adversely affected in certain market cycles, including periods of rising interest rates, which may restrict the availability and increase the cost of capital, and declining economic conditions, which may cause credit losses due to financial difficulties of borrowers. Because many types of financial companies are especially vulnerable to these economic cycles, the Fund’s investments in these companies may lose significant value during such periods.

Market Trading Risks. The Fund faces numerous market trading risks including the potential lack of an active market for Fund shares, losses from trading in secondary markets, and disruption to the activities of market makers, authorized participants, or other participants and in the creation/redemption process of the Fund. ANY OF THESE FACTORS MAY LEAD TO THE FUND’S SHARES TRADING AT A PREMIUM OR DISCOUNT TO NAV.

Portfolio Duration Risk. Portfolio duration is a measure of the expected life of a fixed-income security and its sensitivity to changes in interest rates. The longer a fund's average portfolio duration, the more sensitive the fund will be to changes in interest rates.

Portfolio Turnover (Active Trading) Risk. High portfolio turnover (more than 100%) caused by actively trading portfolio securities may result in accelerating the realization of taxable gains and losses, lower fund performance and increased brokerage costs.

Redemption and Large Transaction Risk. Ownership of the fund's shares may be concentrated in one or a few large investors (such as funds of funds, institutional investors, and asset allocation programs) that may redeem or purchase shares in large quantities. These transactions may cause the fund to sell securities to meet redemptions or to invest additional cash at times it would not otherwise do so, which may result in increased transaction costs, increased expenses, changes to expense ratios, and adverse effects to fund performance. Such transactions may also accelerate the realization of taxable income if sales of portfolio securities result in gains.

Securitized Products Risk. Investments in securitized products are subject to risks similar to traditional fixed income securities, such as credit, interest rate, liquidity, prepayment, extension, and default risk, as well as additional risks associated with the nature of the assets and the servicing of those assets. Unscheduled prepayments on securitized products may have to be reinvested at lower rates. A reduction in prepayments may increase the effective maturities of these securities, exposing them to the risk of decline in market value over time (extension risk).

U.S. Government Securities Risk. Yields available from U.S. government securities are generally lower than yields from many other fixed-income securities.

U.S. Government-Sponsored Securities Risk. Securities issued by U.S. government-sponsored or -chartered enterprises such as the Federal Home Loan Mortgage Corporation, the Federal National Mortgage Association, and the Federal Home Loan Banks are not issued or guaranteed by the U.S. Treasury.

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Performance

No performance information is shown because the Fund has not yet had a calendar year of performance. The Fund’s performance is benchmarked against the Bloomberg Barclays U.S. 1-3 Month Treasury Bill Index. Performance information provides an indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information by calling 1-800-787-1621 or online at www.principalfunds.com/etf-funds.

Investment Advisor and Portfolio Managers

Principal Global Investors, LLC

• John R. Friedl (since 2019), Portfolio Manager

• Paul S. Kim (since 2019), Portfolio Manager

• Scott J. Peterson (since 2019), Portfolio Manager

• Daniela Spassova (since 2019), Portfolio Manager

Purchase and Sale of Fund Shares

The Fund issues and redeems Shares at net asset value (“NAV”) only with authorized participants ("APs") who have entered into agreements with the Fund’s distributor and only in blocks of 50,000 Shares (each block of Shares is called a "Creation Unit"), or multiples thereof ("Creation Unit Aggregations"), in exchange for the deposit or delivery of a basket of securities that the Fund specifies each day. Except when aggregated in Creation Units, the Shares are not redeemable securities of the Fund. Typically, the basket of assets will be made up of securities, but may include a cash component. (See "Purchase and Redemption of Creation Units" in the Statement of Additional Information for more information.)

Individual Shares of the Fund may be purchased and sold only on a national securities exchange through brokers. Shares of the Fund are expected to be listed for trading on NYSE Arca, Inc., and because the Shares will trade at market prices rather than NAV, Shares may trade at prices greater than NAV (at a premium), at NAV, or less than NAV (at a discount).

Tax Information

The Fund’s distributions you receive are generally subject to federal income tax as ordinary income or capital gain and may also be subject to state and local taxes, unless you are tax-exempt or your account is tax-deferred in which case your distributions would be taxed when withdrawn from the tax-deferred account.

Payments to Broker-Dealers and Other Financial Intermediaries

If you purchase the Fund through a broker-dealer or other financial intermediary (such as a bank, insurance company, investment adviser, etc.), the Fund and its related companies may pay the intermediary for the sale of Fund shares and related services. These payments may create a conflict of interest by influencing the broker-dealer or other intermediary and your salesperson to recommend the Fund over another investment. Ask your salesperson or visit your financial intermediary's website for more information.

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ADDITIONAL INFORMATION ABOUT INVESTMENT STRATEGIES AND RISKS

The Fund’s investment objective is described in the summary section for the Fund. The summary section also describes the Fund’s principal investment strategies, including the types of securities in which the Fund invests, and the principal risks of investing in the Fund. The principal investment strategies are not the only investment strategies available to the Fund, but they are the ones the Fund primarily uses to achieve its investment objective.

Except for Fundamental Restrictions described in the Fund’s Statement of Additional Information (“SAI”), the Board of Trustees may change the Fund's objective or investment strategies without a shareholder vote if it determines such a change is in the best interests of the Fund. If there is a material change to the Fund's investment objective or investment strategies, you should consider whether the Fund remains an appropriate investment for you. There is no guarantee that the Fund will meet its objective.

The Fund is designed to be a portion of an investor's portfolio. The Fund is not intended to be a complete investment program. Investors should consider the risks of the Fund before making an investment; it is possible to lose money by investing in the Fund.

Holdings Disclosure

The Fund is actively managed and does not seek to replicate the performance of a specified index. On each business day, before commencement of trading on the exchange, the Fund will disclose on www.principalfunds.com/etf-funds the identities and quantities of the Fund’s portfolio holdings that will form the basis for the Fund’s calculation of the Fund’s net asset value at the end of the business day.

Active Management

The performance of a fund that is actively managed will reflect in part the ability of those managing the investments of the fund to make investment decisions that are suited to achieving the fund's investment objective. Actively-managed funds may invest differently from the benchmark against which the fund's performance is compared. When making decisions about whether to buy or sell fixed-income investments, considerations may include, among other things, the strength of certain sectors of the fixed-income market relative to others, interest rates, the macroeconomic backdrop, the balance between supply and demand for certain asset classes, the credit quality of individual issuers, the fundamental strengths of corporate issuers, and other general market conditions.

Models, which may assist portfolio managers and analysts in formulating their securities trading and allocation decisions by providing investment and risk management insights, may also expose a fund to risks. Models may be predictive in nature, which models depend heavily on the accuracy and reliability of historical data that is supplied by others and may be incorrect or incorrectly input. The fund bears the risk that the quantitative models used will not be successful in identifying trends or in determining the size and direction of investment positions that will enable the fund to achieve its investment objective. In addition, “model prices” will often differ substantially from market prices, especially for instruments with complex characteristics, such as derivative instruments.

An active fund's investment performance depends upon the successful allocation of the fund's assets among asset classes, geographical regions, industry sectors, and specific issuers and investments. There is no guarantee that these allocation techniques and decisions will produce the desired results. It is possible to lose money on an investment in a fund as a result of these allocation decisions. If a fund's investment strategies do not perform as expected, the fund could underperform other funds with similar investment objectives or lose money. Moreover, buying and selling securities to adjust the fund’s asset allocation may increase portfolio turnover and generate transaction costs.

Cash Management

The Fund may have uninvested cash balances pending investment in other securities, pending payment of redemptions, or in other circumstances where liquidity is necessary or desirable. A Fund may hold uninvested cash; invest it in cash equivalents such as money market funds, including the Principal Funds, Inc. Government Money Market Fund; lend it to other Funds pursuant to the Funds' interfund lending facility; and/or invest in other instruments that those managing the Fund’s assets deem appropriate for cash management purposes. Generally, these types of investments offer less potential for gains than other types of securities. To attempt to provide returns similar to its benchmark, a Fund may invest uninvested cash in stock index futures contracts or ETFs, including Principal Exchange-Traded Funds ETFs. In selecting such investments, the Advisor may have conflicts of interest due to economic or other incentives to make or retain an investment in certain affiliated funds instead of in other investments that may be appropriate for the Fund.

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Liquidity

Certain fund holdings may be deemed to be less liquid or illiquid because they cannot be readily sold without significantly impacting the value of the holdings. A fund is exposed to liquidity risk when trading volume, lack of a market maker, or legal restrictions impair its ability to sell particular securities or close derivative positions at an advantageous price. The Fund's principal investment strategies that involve foreign securities or securities with substantial market and/or credit risk tend to have the greatest exposure to liquidity risk.

Liquidity risk also refers to the risk of unusually high redemption requests, redemption requests by certain large shareholders such as institutional investors or asset allocators, or other unusual market conditions that may make it difficult for a fund to sell investments within the allowable time period to meet redemptions. Meeting such redemption requests could require a fund to sell securities at reduced prices or under unfavorable conditions, which would reduce the value of the fund.

Additional liquidity risks that apply to ETFs are described under "Market Trading Risks" below.

Market Volatility and Securities Issuers

The value of the Fund's portfolio securities may decrease in response to overall stock or bond market movements. Markets tend to move in cycles, with periods of rising prices and periods of falling prices. Stocks tend to go up and down in value more than bonds. If the Fund's investments are concentrated in certain sectors, its performance could be worse than the overall market. The value of an individual security or particular type of security can be more volatile than the market as a whole and can perform differently from the value of the market as a whole. The value of a security may decline for reasons directly related to the issuer, such as management performance, financial leverage and reduced demand for the issuer’s goods or services. It is possible to lose money when investing in the Fund.

Temporary Defensive Measures

From time to time, as part of its investment strategy, the Fund may invest without limit in cash and cash equivalents for temporary defensive purposes in response to adverse market, economic, or political conditions. For this purpose, cash equivalents include: bank notes, bank certificates of deposit, bankers' acceptances, repurchase agreements, commercial paper, and commercial paper master notes, which are floating rate debt instruments without a fixed maturity. In addition, the Fund may purchase U.S. government securities, preferred stocks, and debt securities, whether or not convertible into or carrying rights for common stock. There is no limit on the extent to which the Fund may take temporary defensive measures. In taking such measures, the Fund may lose the benefit of upswings and may limit its ability to meet, or fail to achieve, its investment objective.

Trading Issues

Although the shares of the Fund are expected to be listed on the exchange identified in the fund summary for the Fund, there can be no assurance that an active trading market for such shares will develop or be maintained. Trading in Shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in Shares inadvisable. In addition, trading in Shares on the exchange is subject to trading halts caused by extraordinary market volatility pursuant to the exchange's "circuit breaker" rules. There can be no assurance that the requirements of the exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged.

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Strategy and Risk Table

The following table identifies whether the strategies and risks discussed in this section (listed in alphabetical order) are principal or non-principal (meaning they are relevant to the Fund but to a lesser degree than those designated as principal) for the Fund. The SAI contains additional information about investment strategies and their related risks.

INVESTMENT STRATEGIES AND RISKS	Principal Ultra-Short Active Income ETF
Contingent Convertible Securities	Non-Principal
Emerging Markets	Non-Principal
Fixed-Income Securities	Principal
Foreign Currency	Non-Principal
Foreign Securities	Principal
Industry Concentration	Principal
Investment Company Securities	Non-Principal
Market Trading Risks	Principal
Portfolio Duration	Principal
Portfolio Turnover (Active Trading)	Principal
Preferred Securities	Non-Principal
Real Estate Securities	Non-Principal
Redemption and Large Transaction Risk	Principal
Securitized Products	Principal
U.S. Government and U.S. Government-Sponsored Securities	Principal

Contingent Convertible Securities ("CoCos")

Contingent convertible securities (“CoCos”) are hybrid debt securities intended to either convert into equity or have their principal written down upon the occurrence of certain “triggers.” The triggers are generally linked to regulatory capital thresholds or regulatory actions calling into question the issuing banking institution’s continued viability as a going-concern, if the conversion trigger were not exercised. CoCos’ unique equity conversion or principal write-down features are tailored to the issuing banking institution and its regulatory requirements. Some additional risks associated with CoCos include, but are not limited to, the following:

• The occurrence of a conversion event is inherently unpredictable and depends on many factors, some of which will be outside the issuer’s control. Because of the uncertainty regarding whether a conversion event will occur, it may be difficult to predict when, if at all, a CoCo will be converted to equity, and a fund may suffer losses as a result.

• CoCos may have no stated maturity and fully discretionary coupons. This means coupon (i.e., interest) payments can be canceled at the banking institution’s discretion or at the request of the relevant regulatory authority in order to help the bank absorb losses, without causing a default.

• CoCos are usually issued in the form of subordinated debt instruments to provide the appropriate regulatory capital treatment. If an issuer liquidates, dissolves or winds-up before a conversion to equity has occurred, the rights and claims of the holders of the CoCos (such as a fund) against the issuer generally rank junior to the claims of holders of unsubordinated obligations of the issuer. In addition, if the CoCos are converted into the issuer’s underlying equity securities after a conversion event (i.e., a “trigger”), each holder will be further subordinated.

• The value of CoCos is unpredictable and is influenced by many factors including, without limitation: the creditworthiness of the issuer and/or fluctuations in such issuer’s applicable capital ratios; supply and demand for CoCos; general market conditions and available liquidity; and economic, financial and political events that affect the issuer, its particular market or the financial markets in general. Moreover, the performance of CoCos may be correlated with one another and as a result negative information of one issuer may cause decline in the value of CoCos of many other issuers.

Due to these features, CoCos may have substantially greater risk than other securities in times of financial stress. If the trigger level is breached, the issuer’s decision to write down, write off or convert a CoCo may result in the fund's complete loss on an investment in CoCos with no chance of recovery even if the issuer remains in existence.

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Emerging Markets

The Fund considers a security to be tied economically to an emerging market country (an “emerging market security”) if the issuer of the security has its principal place of business or principal office in an emerging market country, has its principal securities trading market in an emerging market country, or derives a majority of its revenue from emerging market countries.

Usually, the term "emerging market country" (also called a "developing country") means any country that is considered to be an emerging country by the international financial community (including the MSCI Emerging Markets Index or Bloomberg Barclays Emerging Markets USD Aggregate Bond Index). These countries generally exclude the U.S., Canada, Japan, Australia, New Zealand, Hong Kong, and Singapore and most nations located in Western Europe.

Investments in companies in emerging (also called "developing") market countries are subject to higher risks than investments in companies in more developed countries. These risks include:

• increased social, political, and economic instability;

• a smaller market for these securities and low or nonexistent trading volume that results in a lack of liquidity and greater price volatility;

• lack of publicly available information, including reports of payments of dividends or interest on outstanding securities;

• foreign government policies that may restrict opportunities, including restrictions on investment in issuers or industries deemed sensitive to national interests;

• relatively new capital market structure or market-oriented economy;

• the possibility that recent favorable economic developments may be slowed or reversed by unanticipated political or social events in these countries;

• restrictions that may make it difficult or impossible for the Fund to vote proxies, exercise shareholder rights, pursue legal remedies, and obtain judgments in foreign courts; and

• possible losses through the holding of securities in domestic and foreign custodial banks and depositories.

In addition, many developing countries have experienced substantial and, in some periods, extremely high rates of inflation for many years. Inflation and rapid fluctuations in inflation rates have had and may continue to have negative effects on the economies, currencies, interest rates, and securities markets of those countries.

Repatriation of investment income, capital, and proceeds of sales by foreign investors may require governmental registration and/or approval in some developing countries. The Fund could be adversely affected by delays in or a refusal to grant any required governmental registration or approval for repatriation.

Further, the economies of developing countries generally are heavily dependent upon international trade and, accordingly, have been and may continue to be adversely affected by trade barriers, exchange controls, managed adjustments in relative currency values and other protectionist measures imposed or negotiated by the countries with which they trade.

Fixed-Income Securities

Fixed-income securities include bonds and other debt instruments that are used by issuers to borrow money from investors. Examples include corporate bonds, convertible bonds, asset-backed securities, residential and commercial mortgage-backed securities, agency securities (such as debt instruments issued by U.S. government-sponsored entities and other federally-related entities), inverse floaters, covered securities, sinking fund securities, equipment trust certificates, sovereign bonds, pay-in-kind securities (which pay investors in the form of additional securities rather than cash), and step coupon securities (which pay interest at predetermined rates that increase or decrease over time).

Fixed-income securities are sensitive to changes in interest rates. In general, fixed-income security prices rise when interest rates fall and fall when interest rates rise. An increase in interest rates from the current, historically low interest rate environment may lead to heightened volatility and redemptions alongside reduced liquidity and dealer market-making capacity in fixed income markets. If interest rates fall, issuers of callable bonds may call (repay) securities with high interest rates before their maturity dates; this is known as call risk. In this case, the Fund would likely reinvest the proceeds from these securities at lower interest rates, resulting in a decline in the Fund's income. Floating rate securities generally are less sensitive to interest rate changes but may decline in value if their interest rates do not rise as much, or as quickly, as interest rates in general. Conversely, floating rate securities will not generally increase in value if interest rates decline.

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Fixed-income securities are also affected by the credit quality of the issuer. Investment grade debt securities are medium and high-quality securities. Some bonds, such as lower grade or "junk" bonds, may have speculative characteristics and may be particularly sensitive to economic conditions and the financial condition of the issuers. Credit risk refers to the possibility that the issuer of the security will not be able to make principal and interest payments when due.

The Fund may invest in fixed-income securities of companies with small- or medium-sized market capitalizations. Investments in companies with smaller market capitalizations may involve greater risks, price volatility (wide, rapid fluctuations), and less liquidity than investments in larger, more mature companies.

Foreign Currency

Certain of the Fund’s investments will be denominated in foreign currencies or traded in securities markets in which settlements are made in foreign currencies. Any income on such investments is generally paid to a fund in foreign currencies. In addition, the Fund may engage in foreign currency transactions for both hedging and investment purposes, as well as to increase exposure to a foreign currency or to shift exposure to foreign currency fluctuations from one country to another.

The value of foreign currencies relative to the U.S. dollar varies continually, causing changes in the dollar value of a fund’s portfolio investments (even if the local market price of the investments is unchanged) and changes in the dollar value of a fund’s income available for distribution to its shareholders. The effect of changes in the dollar value of a foreign currency on the dollar value of a fund’s assets and on the net investment income available for distribution may be favorable or unfavorable. Transactions in non-U.S. currencies are also subject to many of the risks of investing in foreign (non-U.S.) securities; for example, changes in foreign economies and political climates are more likely to affect a fund that has foreign currency exposure than a fund that invests exclusively in U.S. companies and currency. There also may be less government supervision of foreign markets, resulting in non-uniform accounting practices and less publicly available information. Transactions in foreign currencies, foreign currency denominated debt and certain foreign currency options, futures contracts and forward contracts (and similar instruments) may give rise to ordinary income or loss to the extent such income or loss results from fluctuations in the value of the foreign currency concerned.

A fund may incur costs in connection with conversions between various currencies. In addition, a fund may be required to liquidate portfolio assets, or may incur increased currency conversion costs, to compensate for a decline in the dollar value of a foreign currency occurring between the time when a fund declares and pays a dividend, or between the time when a fund accrues and pays an operating expense in U.S. dollars. To protect against a change in the foreign currency exchange rate between the date on which a fund contracts to purchase or sell a security and the settlement date for the purchase or sale, to gain exposure to one or more foreign currencies or to “lock in” the equivalent of a dividend or interest payment in another currency, a fund might purchase or sell a foreign currency on a spot (i.e., cash) basis at the prevailing spot rate.

Currency hedging involves some of the same general risks and considerations as other transactions with similar instruments (i.e., derivative instruments) and hedging. Currency transactions are also subject to additional risks. Because currency control is of great importance to the issuing governments and influences economic planning and policy, purchases and sales of currency and related instruments can be adversely affected by government exchange controls, limitations or restrictions on repatriation of currency, and manipulations or exchange restrictions imposed by governments. These forms of governmental actions can result in losses to a fund if it is unable to deliver or receive currency or monies in settlement of obligations. They could also cause hedges the fund has entered into to be rendered useless, resulting in full currency exposure as well as incurring transaction costs. Settlement of a currency forward contract for the purchase of most currencies must occur at a bank based in the issuing nation. The ability to establish and close out positions on trading options on currency futures contracts is subject to the maintenance of a liquid market that may not always be available.

Foreign Securities

The Fund considers a security to be tied economically to countries outside the U.S. (a “foreign security”) if the issuer of the security has its principal place of business or principal office outside the U.S., has its principal securities trading market outside the U.S., or derives a majority of its revenue from outside the U.S.

Foreign companies may not be subject to the same uniform accounting, auditing, and financial reporting practices as are required of U.S. companies. In addition, there may be less publicly available information about a foreign company than about a U.S. company. Securities of many foreign companies are less liquid and more volatile than securities of comparable U.S. companies. Commissions on foreign securities exchanges may be generally higher than those on U.S. exchanges.

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Foreign markets also have different clearance and settlement procedures than those in U.S. markets. In certain markets, there have been times when settlements have been unable to keep pace with the volume of securities transactions, making it difficult to conduct these transactions. Delays in settlement could result in temporary periods when a portion of Fund assets is not invested and earning no return. If the Fund is unable to make intended security purchases due to settlement problems, the Fund may miss attractive investment opportunities. In addition, the Fund may incur a loss as a result of a decline in the value of its portfolio if it is unable to sell a security.

With respect to certain foreign countries, there is the possibility of nationalization, expropriation or confiscatory taxation, political or social instability, or diplomatic developments that could affect the Fund's investments in those countries. In addition, the Fund may also suffer losses due to differing accounting practices and treatments. Investments in foreign securities are subject to laws of the foreign country that may limit the amount and types of foreign investments. Changes of governments or of economic or monetary policies, in the U.S. or abroad, changes in dealings between nations, currency convertibility or exchange rates could result in investment losses for the Fund.

Foreign securities are often traded with less frequency and volume, and therefore may have greater price volatility than is the case with many U.S. securities. Brokerage commissions, custodial services, and other costs relating to investment in foreign countries are generally more expensive than in the U.S. Though the Fund intends to acquire the securities of foreign issuers where there are public trading markets, economic or political turmoil in a country in which the Fund has a significant portion of its assets or deterioration of the relationship between the U.S. and a foreign country may reduce the liquidity of the Fund's portfolio, and the Fund may have difficulty meeting a large number of redemption requests. Furthermore, there may be difficulties in obtaining or enforcing judgments against foreign issuers.

If a fund's portfolio is over-weighted in a certain geographic region, any negative development affecting that region will have a greater impact on the fund than a fund that is not over-weighted in that region.

Industry Concentration

A fund that concentrates its investments (invests more than 25% of its net assets) in a particular industry (or group of industries) is more exposed to the overall condition of the particular industry than a fund that invests in a wider variety of industries. A particular industry could be affected by economic, business, supply-and-demand, political, or regulatory factors. Companies within the same industry could react similarly to such factors. As a result, a fund’s concentration in a particular industry would increase the possibility that the fund’s performance will be affected by such factors.

Investment Company Securities

Securities of other investment companies, including shares of closed-end investment companies, unit investment trusts, various exchange-traded funds ("ETFs"), and other open-end investment companies, represent interests in professionally managed portfolios that may invest in a variety of instruments. Certain types of investment companies, such as closed-end investment companies, issue a fixed number of shares that trade on a stock exchange or over-the-counter at a premium or a discount to their net asset value. Others are continuously offered at net asset value, but may also be traded in the secondary market. ETFs are often structured to perform in a similar fashion to a broad-based securities index. Investing in ETFs involves generally the same risks as investing directly in the underlying instruments. Investing in ETFs involves the risk that they will not perform in exactly the same fashion, or in response to the same factors, as the index or underlying instruments. Shares of ETFs may trade at prices other than NAV.

A fund that invests in another investment company is subject to the risks associated with direct ownership of the securities in which such investment company invests. Fund shareholders indirectly bear their proportionate share of the expenses of each such investment company, including its advisory and administrative fees. The Fund would also continue to pay its own advisory fees and other expenses. Consequently, the Fund and its shareholders would, in effect, absorb two levels of fees with respect to investments in other investment companies.

A fund may invest in affiliated underlying funds, and those who manage such fund's investments and their affiliates may earn different fees from different underlying funds and may have an incentive to allocate more fund assets to underlying funds from which they receive higher fees.

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Market Trading Risks

The net asset value ("NAV") of the Shares generally will fluctuate with changes in the market value of the Fund's holdings. The market prices of the Shares generally will fluctuate in accordance with changes in NAV, as well as the relative supply of and demand for Shares on the respective exchanges, PGI cannot predict whether the Shares will trade below, at or above their NAV. Price differences may be due largely to the fact that supply and demand forces at work in the secondary trading market for the Shares will be related, but not identical, to the forces influencing the prices of the securities held by the Fund (individually or in the aggregate) at any time.

Only authorized participants ("APs") may engage in creation or redemption transactions directly with the Fund. (See "Purchase and Sale of Fund Shares-Generally.") The Fund has a limited number of institutions that may act as APs, none of which are or will be obligated to engage in creation or redemption transactions. To the extent that these institutions exit the business or are unable or unwilling to proceed with creation and/or redemption orders with respect to the Fund, and no other AP is able or willing to step forward to create or redeem Creation Units, Fund shares may trade at a discount to NAV and possibly face trading halts and/or delisting. Such disruptions to creations and redemptions or the existence of extreme market volatility may result in trading prices that differ significantly from NAV.

With respect to funds that invest in foreign securities, since foreign exchanges may be open on days when such a fund does not price its shares, the value of the fund’s portfolio may change on days when shareholders will not be able to purchase or sell the fund’s Shares, and may result in trading prices that differ significantly from NAV. Additionally, such funds may be subject to heightened risks since APs may be required to post collateral with such investments, which only certain APs are able to do. Moreover, to the extent that an AP is unable or unwilling to trade on an agency basis for foreign securities, there could be a diminished trading market for ETF shares, and shares may trade at a discount to NAV.

If a shareholder purchases at a time when the market price is at a premium to the NAV or sells at a time when the market price is at a discount to the NAV, the shareholder may sustain losses. Given that Shares can be created and redeemed only in Creation Units at NAV, PGI believes that large discounts and premiums should not be sustained over the long term.

Portfolio Duration

Average duration is a mathematical calculation of the average life of a bond (or for a bond fund, the average life of the fund's underlying bonds, weighted by the percentage of the fund's assets that each represents) that serves as a useful measure of its price risk. Duration is an estimate of how much the value of the bonds held by a fund will fluctuate in response to a change in interest rates. For example, if a fund has an average duration of 4 years and interest rates rise by 1%, the value of the bonds held by the fund will decline by approximately 4%, and if the interest rates decline by 1%, the value of the bonds held by the fund will increase by approximately 4%. Longer term bonds and zero coupon bonds are generally more sensitive to interest rate changes. Duration, which measures price sensitivity to interest rate changes, is not necessarily equal to average maturity.

Portfolio Turnover (Active Trading)

"Portfolio Turnover" is the term used in the industry for measuring the amount of trading that occurs in a fund's portfolio during the year. For example, a 100% turnover rate means that on average every security in the portfolio has been replaced once during the year. Funds with high turnover rates (more than 100%) are considered actively traded and often have higher transaction costs (which are paid by the Fund) that may lower the Fund's performance. High portfolio turnover can result in a lower capital gain distribution due to higher transaction costs added to the basis of the assets or can result in lower ordinary income distributions to shareholders when the transaction costs cannot be added to the basis of assets. Both events reduce fund performance.

Please consider all the factors when you compare the turnover rates of different funds.

Preferred Securities

Preferred securities include preferred stock and various types of junior subordinated debt and trust preferred securities. Preferred securities may pay fixed rate or adjustable rate distributions and generally have a payment "preference" over common stock, but are junior to the issuer's senior debt in a liquidation of the issuer’s assets. Preference would mean that a company must pay on its preferred securities before paying on its common stock, and that any claims of the preferred security holder would typically be ahead of common stockholders' claims on assets in a corporate liquidation.

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Holders of preferred securities usually have no right to vote for corporate directors or on other matters. The market value of preferred securities is sensitive to changes in interest rates as they are typically fixed income securities; the fixed-income payments are expected to be the primary source of long-term investment return. While some preferred securities are issued with a final maturity date, others are perpetual in nature. In certain instances, a final maturity date may be extended and/or the final payment of principal may be deferred at the issuer’s option for a specified time without triggering an event of default for the issuer. In addition, an issuer of preferred securities may have the right to redeem the securities before their stated maturity date. For instance, for certain types of preferred securities, a redemption may be triggered by a change in federal income tax or securities laws. As with call provisions, a redemption by the issuer may reduce the return of the security held by the fund. Preferred securities may be subject to provisions that allow an issuer, under certain circumstances to skip (indefinitely) or defer (possibly up to 10 years) distributions. If a fund owns a preferred security that is deferring its distribution, the fund may be required to report income for tax purposes while it is not receiving any income.

Preferred securities are typically issued by corporations, generally in the form of interest or dividend bearing instruments, or by an affiliated business trust of a corporation, generally in the form of beneficial interests in subordinated debentures or similarly structured securities. The preferred securities market is generally divided into the $25 par “retail” and the $1,000 par “institutional” segments. The $25 par segment includes securities that are listed on the New York Stock Exchange (exchange traded), which trade and are quoted with accrued dividend or interest income, and which are often callable at par value five years after their original issuance date. The institutional segment includes $1,000 par value securities that are not exchange-listed (over the counter), which trade and are quoted on a “clean” price, i.e., without accrued dividend or interest income, and which often have a minimum of 10 years of call protection from the date of their original issuance. Preferred securities can also be issued by real estate investment trusts and involve risks similar to those associated with investing in real estate investment trust companies.

Real Estate Securities

Investing in securities of companies in the real estate industry subjects a fund to the special risks associated with the real estate market and the real estate industry in general. Generally, companies in the real estate industry are considered to be those that have principal activity involving the development, ownership, construction, management or sale of real estate; have significant real estate holdings, such as hospitality companies, healthcare facilities, supermarkets, mining, lumber and/or paper companies; and/or provide products or services related to the real estate industry, such as financial institutions that make and/or service mortgage loans and manufacturers or distributors of building supplies. Securities of companies in the real estate industry are sensitive to factors such as loss to casualty or condemnation, changes in real estate values, property taxes, interest rates, cash flow of underlying real estate assets, occupancy rates, government regulations affecting zoning, land use and rents, and the management skill and creditworthiness of the issuer. Companies in the real estate industry may also be subject to liabilities under environmental and hazardous waste laws.

Redemption and Large Transaction Risk

Ownership of the fund's shares may be concentrated in one or a few large investors (such as funds of funds, institutional investors, and asset allocation programs) that may redeem or purchase shares in large quantities. These transactions may cause the fund to sell securities to meet redemptions or to invest additional cash at times it would not otherwise do so, which may result in increased transaction costs, increased expenses, changes to expense ratios, and adverse effects to fund performance. Such transactions may also accelerate the realization of taxable income if sales of portfolio securities result in gains.

Principal Global Investors, LLC ("PGI") is the advisor to the Principal Funds, Inc. ("PFI") and Principal Variable Contracts Funds, Inc. ("PVC") funds of funds, including the Strategic Asset Management ("SAM") Portfolios and each of their underlying funds, which may include Principal Exchange-Traded Funds. PGI is committed to minimizing the potential impact of underlying fund risk on underlying funds to the extent consistent with pursuing the investment objectives of the funds of funds that it manages. PGI may face conflicts of interest in fulfilling its responsibilities to all such funds.

Purchases and redemptions of creation units primarily with cash rather through in kind delivery of portfolio securities may cause the ETF to incur certain costs, such as brokerage costs or taxable gains or losses that it might not have incurred if it had made redemption in kind. These costs could be imposed on the ETF and thus decrease its NAV to the extent that the costs are not offset by a transaction fee payable by an authorized participant.

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Securitized Products

Securitized products are fixed income instruments that represent interests in underlying pools of collateral or assets. The value of the securitized product is derived from the performance, value, and cash flows of the underlying asset(s). A fund’s investments in securitized products are subject to risks similar to traditional fixed income securities, such as credit, interest rate, liquidity, prepayment, extension, and default risk, as well as additional risks associated with the nature of the assets and the servicing of those assets. Prepayment risk may make it difficult to calculate the average life of a fund’s investment in securitized products. Securitized products are generally issued as pass-through certificates, which represent the right to receive principal and interest payments collected on the underlying pool of assets, which are passed through to the security holder. Therefore, repayment depends on the cash flows generated by the underlying pool of assets. The securities may be rated as investment-grade or below-investment-grade.

• Mortgage-backed securities (“MBS”) represent an interest in a pool of underlying mortgage loans secured by real property. MBS are sensitive to changes in interest rates, but may respond to these changes differently from other fixed income securities due to the possibility of prepayment of the underlying mortgage loans. If interest rates fall and the underlying loans are prepaid faster than expected, the fund may have to reinvest the prepaid principal in lower yielding securities, thus reducing the fund’s income. Conversely, rising interest rates tend to discourage refinancings and the underlying loans may be prepaid more slowly than expected, reducing a fund’s potential to reinvest the principal in higher yielding securities and extending the duration of the underlying loans. In addition, when market conditions result in an increase in default rates on the underlying loans and the foreclosure values of the underlying real estate is less than the outstanding amount due on the underlying loan, collection of the full amount of accrued interest and principal on these investments may be doubtful. The risk of such defaults is generally higher in the case of underlying mortgage pools that include sub-prime mortgages (mortgages granted to borrowers whose credit histories would not support conventional mortgages).

• Commercial mortgage-backed securities (“CMBS”) represent an interest in a pool of underlying commercial mortgage loans secured by real property such as retail, office, hotel, multi-family, and industrial properties. Certain CMBS are issued in several classes with different levels of yield and credit protection, and the CMBS class in which a fund invests usually influences the interest rate, credit, and prepayment risks.

• Asset-backed securities (“ABS”) are backed by non-mortgage assets such as company receivables, truck and auto loans, student loans, leases and credit card receivables. ABS entail credit risk. They also may present a risk that, in the event of default, the liquidation value of the underlying assets may be inadequate to pay any unpaid interest or principal.

U.S. Government and U.S. Government-Sponsored Securities

U.S. Government securities, such as Treasury bills, notes and bonds and mortgage-backed securities guaranteed by the Government National Mortgage Association ("Ginnie Mae"), are supported by the full faith and credit of the United States; others are supported by the right of the issuer to borrow from the U.S. Treasury; others are supported by the discretionary authority of the U.S. Government to purchase the agency's obligations; and still others are supported only by the credit of the issuing agency, instrumentality, or enterprise.

Although U.S. Government-sponsored enterprises such as the Federal Home Loan Mortgage Corporation ("Freddie Mac") and the Federal National Mortgage Association ("Fannie Mae") may be chartered or sponsored by Congress, they are not funded by Congressional appropriations, and their securities are not issued by the U.S. Treasury nor supported by the full faith and credit of the U.S. Government.

There is no assurance that the U.S. Government would provide financial support to its agencies and instrumentalities if not required to do so. In addition, certain governmental entities have been subject to regulatory scrutiny regarding their accounting policies and practices and other concerns that may result in legislation, changes in regulatory oversight and/or other consequences that could adversely affect the credit quality, availability, or investment character of securities issued by these entities. The value and liquidity of U.S. Government securities may be affected adversely by changes in the ratings of those securities.

PORTFOLIO HOLDINGS INFORMATION

A description of the Fund's policies and procedures with respect to disclosure of the Fund's portfolio securities is available in the SAI.

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MANAGEMENT OF THE FUND

The Manager and Advisor

Principal Global Investors, LLC (“PGI”), an indirect subsidiary of Principal Financial Group, Inc. (“Principal^®”), serves as the manager and advisor for the Fund. Through the Management Agreement with the Fund, PGI provides investment advisory services and certain corporate administrative services for the Fund.

Advisor: Principal Global Investors, LLC ("PGI"), 711 High Street, Des Moines, IA 50392, is part of a diversified global asset management organization which utilizes a multi-boutique strategy of specialized investment groups and affiliates to provide institutional investors and individuals with diverse investment capabilities, including fixed income, equities, real estate, currency, asset allocation and stable value. PGI also has asset management offices of affiliate advisors in non-U.S. locations including London, Singapore, Tokyo, Hong Kong and Sydney. PGI has been an investment advisor since 1998.

Fund(s): In fulfilling its investment advisory responsibilities, PGI also provides the day-to-day discretionary investment services (directly making decisions to purchase or sell securities) for the Principal Ultra-Short Active Income ETF.

John R. Friedl has been with Principal ^® since 1998. He earned a B.A. in Communications and History from the University of Washington and a master's degree in Finance from Seattle University. Mr. Friedl has earned the right to use the Chartered Financial Analyst designation.

Paul S. Kim has been with Principal ^® since 2015. Previously, he was a senior vice president at PIMCO from 2009 to 2015. He earned a bachelor’s degree in Economics from Dartmouth College and an M.B.A. in Finance from The Wharton School at the University of Pennsylvania. Mr. Kim has earned the right to use the Chartered Financial Analyst designation.

Scott J. Peterson has been with Principal ^® since 2002. He earned a bachelor’s degree in Mathematics from Brigham Young University and an M.B.A. from New York University’s Stern School of Business. Mr. Peterson has earned the right to use the Chartered Financial Analyst designation.

Daniela Spassova has been with Principal ^® since 1999. She earned an M.B.A. from the University of Iowa and a Master of Arts from Sofia University. Ms. Spassova has earned the right to use the Chartered Financial Analyst designation.

Fees Paid to PGI

The Fund pays PGI a fee for its services, which includes the fee PGI pays to State Street Bank and Trust for fund administration, fund accounting and other services. Pursuant to the Management Agreement between the Fund and PGI, PGI pays all operating expenses of the Fund, except interest expenses, taxes, brokerage commissions and other expenses connected with executions of portfolio transactions, acquired fund fees and expenses, future distribution fees or expenses, and extraordinary expenses.

The management fee schedule for the Fund, which has not completed a full fiscal year, is as follows.

Fund	All Assets
Principal Ultra-Short Active Income ETF	0.18%

Availability of the discussions regarding the basis for the Board of Trustees approval of the management agreement is as follows:

	Annual Report to Shareholders for the period ending June 30, 2019
Fund	Management Agreement
Principal Ultra-Short Active Income ETF	X

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Manager of Managers

Principal Exchange-Traded Funds (the "Trust") operates as a Manager of Managers. Under an order received from the SEC (the "current order"), the Trust and PGI may enter into and materially amend agreements with unaffiliated and wholly-owned affiliated sub-advisors (affiliated sub-advisors which are at least 95% owned, directly or indirectly, by PGI or an affiliated person of PGI) without obtaining shareholder approval. PGI may, without obtaining shareholder approval:

• hire one or more sub-advisors;

• change sub-advisors; and

• reallocate management fees between itself and sub-advisors.

Additionally, the Trust has applied to the SEC for an amended exemptive order, which if granted, would allow PGI to also enter into and materially amend agreements with majority-owned affiliated sub-advisors (affiliated sub-advisors which are at least 50% owned, directly or indirectly, by PGI or an affiliated person of PGI) (the "majority-owned order"). There is no assurance, however, that the SEC will grant the majority-owned order.

PGI has ultimate responsibility for the investment performance of each fund that utilizes a sub-advisor due to its responsibility to oversee sub-advisors and recommend their hiring, termination, and replacement. No fund will rely on the current order, the majority-owned order, or any future order until it receives approval from its shareholders (or in the case of a new fund, the fund's sole initial shareholder before the fund is available to other purchasers).

The shareholders of the Fund have approved the Fund’s reliance on the current order. The shareholders of the Fund have also approved reliance on the majority-owned order, should the SEC grant that relief in the future.

DISTRIBUTOR AND OTHER FUND SERVICE PROVIDERS

ALPS Distributors, Inc. (the "Distributor") serves as the principal underwriter and distributor of Creation Units for the Fund. The Distributor does not maintain a secondary market in Shares.

State Street Bank and Trust Company is the sub-administrator, custodian, transfer agent, and dividend disbursing agent for the Fund.

PRICING OF FUND SHARES

The Fund will directly issue and redeem Shares on a continuous basis, to and from authorized participants ("APs"), at net asset value ("NAV") per Share in aggregations of 50,000 Shares called “Creation Units.” The value of the Fund's Shares bought and sold in the secondary market (on the exchange identified in the Fund summary) will be determined by market price, as described in the section below.

The Board of Trustees has delegated day-to-day valuation oversight responsibilities to PGI. PGI has established a Valuation Committee to fulfill these oversight responsibilities. The NAV of the Fund is calculated each day the New York Stock Exchange ("NYSE") is open (share prices are not calculated on the days on which the NYSE is closed for trading, generally New Year’s Day, Martin Luther King, Jr. Day, Washington’s Birthday, Presidents’ Day, Good Friday, Memorial Day, Independence Day, Labor Day, Thanksgiving Day, and Christmas). The share price is determined as of the close of business of the NYSE (normally 4:00 p.m. Eastern Time). The Fund will not treat an intraday unscheduled disruption in NYSE trading as a closure of the NYSE and will price its shares as of 4:00 p.m. Eastern Time, if the particular disruption directly affects only the NYSE.

Notes:

• If market quotations are not readily available for a security owned by the Fund, its fair value is determined using a policy adopted by the Trustees. Fair valuation pricing is subjective and creates the possibility that the fair value determined for a security may differ materially from the value that could be realized upon the sale of the security.

• The Fund's securities may be traded on foreign securities markets that generally complete trading at various times during the day before the close of the NYSE. Foreign securities and currencies are converted to U.S. dollars using the exchange rate in effect at the close of the NYSE.

• The trading of foreign securities generally or in a particular country or countries may not take place on all days the NYSE is open, or may trade on days the NYSE is closed. Thus, the value of the foreign securities held by the Fund may change on days when shareholders are unable to purchase or redeem shares.

• Certain securities issued by companies in emerging market countries may have more than one quoted valuation at any point in time. These may be referred to as local price and premium price. The premium price is often a negotiated price that may not consistently represent a price at which a specific transaction can be effected. The Fund has a policy to value such securities at a price at which those managing the investments of the Fund expect the securities may be sold.

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• With respect to any portion of a Fund’s assets invested in other registered investment companies, that portion of the Fund's NAV is calculated based on the price (NAV or market, as applicable) of such other registered investment companies.

Fund Share Trading Prices and IOPV – Secondary Market

The trading prices of Shares of the Fund on the exchange may differ from the Fund's daily NAV. The price of the Shares will be subject to factors such as supply and demand, as well as the current value of the Fund’s portfolio securities. Secondary market Shares, which are available for purchase or sale on an intraday basis, do not have a fixed relationship to either the previous day’s NAV or to the current day’s NAV. Prices in the secondary market, therefore, may be below, at, or above the most recently calculated NAV per Share.

The approximate value of shares of the Fund, known as the “indicative optimized portfolio value” (“IOPV”) will be disseminated every fifteen seconds throughout the trading day by the national securities exchange on which the Fund is listed or by other information providers or market data vendors. The IOPV is based on the current market value of holdings contained in the Fund's portfolio at the beginning of the trading day. The IOPV does not necessarily reflect the precise composition of the current portfolio of securities held by the Fund at a particular point in time nor the best possible valuation of the current portfolio. The IOPV should not be viewed as a “real-time” update of the NAV, because the IOPV may not be calculated in the same manner as the NAV, which is computed once a day as discussed below. The IOPV is generally determined by using current market quotations and/or price quotations obtained from broker-dealers that may trade in the portfolio securities held by the Fund. The quotations of certain Fund holdings may not be updated during U.S. trading hours if such holdings do not trade in the U.S. The Fund is not involved in, or responsible for, the calculation or dissemination of the IOPV and makes no warranty as to its accuracy.

Shares of the Fund may trade in the secondary market on days when the Fund does not accept orders to purchase or redeem shares. On such days, shares may trade in the secondary market with more significant premiums or discounts than might otherwise be experienced on days when the Fund accepts purchase and redemption orders.

Information regarding how often the Shares of the Fund traded on the exchange at a price above (at a premium) or below (at a discount) the NAV per Share of the Fund during the past four calendar quarters (if available) can be found at www.principalfunds.com/etf-funds. Data presented represents past performance and cannot be used to predict future results.

PURCHASE AND SALE OF FUND SHARES

Generally

The Fund will directly issue shares to authorized participants ("APs") on a continuous basis at net asset value ("NAV") per Share in aggregations of 50,000 Shares called “Creation Units,” in exchange for portfolio securities. To be an AP, you must be a broker or dealer or other participant ("Participating Party") in the Continuous Net Settlement System of the National Securities Clearing Corporation (“NSCC”) or a participant in the DTC with access to the DTC system (“DTC Participant”), and you must execute an agreement ("Participant Agreement") with the Distributor, which must be accepted by the Transfer Agent, that governs transactions in the Fund's Creation Units.

APs may acquire Shares directly from the Fund, and APs may tender their Shares for redemption directly to the Fund, at NAV per Share only in Creation Units or Creation Unit Aggregations, and in accordance with the procedures described in the SAI. Shares are not individually redeemable, but are redeemable only in Creation Unit aggregations, and in exchange for portfolio securities and/or cash. A Creation Unit of the Fund will consist of a block of 50,000 shares, which is subject to change.

All orders to purchase or redeem Creation Units must be placed through an AP that has entered into a Participant Agreement with the Distributor and accepted by the Transfer Agent with respect to the creation and redemption of Creation Units. An investor purchasing or redeeming a Creation Unit from the Fund may be charged a fee (“Transaction Fee”) to protect existing shareholders of the Fund from the dilutive costs associated with the purchase and redemption of Creation Units.

Shareholders who are not APs will not be able to purchase or redeem Shares directly with or from the Fund. As a result, most investors will buy and sell Shares of the Fund in secondary market transactions through brokers. Shares of the Fund are expected to be listed for trading on the secondary market on the exchange identified in the Fund Summary for the Fund. Shares can be bought and sold throughout the trading day like other publicly traded shares. There is no minimum investment. When buying or selling Shares through a broker, you will incur customary brokerage commissions and charges, and you may pay some or all of the spread between the bid and the offered price in the secondary market on each leg of a round trip (purchase and sale) transaction. Due to the costs of buying or selling shares, including bid/ask spreads, frequent trading of shares may significantly reduce investment results and an investment in Shares may not be advisable for investors who anticipate regularly making small investments. Shares of

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the Fund trade under the symbols set forth on the cover of this prospectus. Contact your broker for additional information on how to buy and sell Shares.

PGI may recommend to the Board, and the Board may elect, to liquidate and terminate the Fund at any time without shareholder approval.

Note: No salesperson, broker-dealer, or other person is authorized to give information or make representations about the Fund other than those contained in this Prospectus. Information or representations not contained in this prospectus may not be relied upon as having been provided or made by the Trust, the Fund, PGI, any Sub-Advisor, or the Distributor.

Book Entry

Shares are held in book-entry form, which means that no stock certificates are issued. The Depository Trust Company ("DTC") or its nominee is the record owner of all outstanding Shares of the Fund and is recognized as the owner of all Shares for all purposes.

Investors owning Shares are beneficial owners as shown on the records of DTC or its participants. DTC serves as the securities depository for all Shares. Participants in DTC include securities brokers and dealers, banks, trust companies, clearing corporations and other institutions that directly or indirectly maintain a custodial relationship with DTC. As a beneficial owner of Shares, you are not entitled to receive physical delivery of stock certificates or to have Shares registered in your name, and you are not considered a registered owner of Shares. Therefore, to exercise any right as an owner of Shares, you must rely upon the procedures of DTC and its participants. These procedures are the same as those that apply to any other stocks that you hold in book entry or "street name" form.

DIVIDENDS AND DISTRIBUTIONS

The Fund intends to generally make distributions of net income monthly. The factors that could affect the Fund’s ability to make regular monthly distributions include, without limitation, changes in interest rates, the performance of the financial markets in which the Fund invests, the allocation of Fund assets across different asset classes and investments, the performance of the Fund’s investment strategies, and the amount and timing of the Fund’s prior distributions. The Fund seeks to tailor the amount of its monthly income payments to moderate fluctuations in the amounts it distributes to shareholders over the course of the year. Although the Fund attempts to moderate fluctuations, the amounts it distributes to shareholders are not fixed and may not be the same each month. Further, the Fund does not guarantee it will make any monthly income payments to its shareholders.

The Fund does not expect to make distributions that will be treated as return of capital, although the Fund cannot guarantee that it will not do so. Return of capital represents the return of a shareholder’s original investment in Fund shares, not a dividend from the Fund’s profits and earnings. If the Fund’s distributions are treated as a return of capital, the distributions themselves may not be taxable, but they will lower a shareholder's basis in the Fund shares so that when such shares are sold (even if they are sold at a loss on the original investment), the shareholder may be obligated to pay taxes on the capital gains. At the end of the year, the Fund may be required under applicable law to re-characterize distributions for the year among ordinary income, capital gains, and return of capital (if any) for purposes of tax reporting to shareholders.

To the extent that distributions the Fund pays are derived from a source other than net income (such as a return of capital), you will receive a notice disclosing the source of such distributions. Furthermore, such notice will be posted monthly on our website at www.principalfunds.com/etf-funds. You may request a copy of all such notices, free of charge, by telephoning 1-800-787-1621. The amounts and sources of distributions included in such notices are estimates only and you should not rely upon them for purposes of reporting income taxes. The Fund will send shareholders a Form 1099-DIV for the calendar year that will tell shareholders with how to report these distributions for federal income tax purposes.

No dividend reinvestment service is provided by the Trust. Broker-dealers may make available DTC book-entry Dividend Reinvestment Service for use by beneficial owners of the Fund for reinvestment of their dividend distributions. Beneficial owners should contact their broker to determine the availability and costs of the service and the details of participation. Brokers may require beneficial owners to adhere to specific procedures and timetables. If this service is available and used, dividend distributions of both income and realized gains will be automatically reinvested in additional whole shares of the Fund purchased in the secondary market.

FREQUENT PURCHASES AND REDEMPTIONS

Particularly where creation and redemption baskets include a cash component, frequent purchases and redemptions pose a risk to the Funds because they may disrupt the management of the Funds by forcing the Funds to hold short-term (liquid) assets rather than investing for long-term growth, which results in lost investment opportunities for the

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Funds. Such transactions may also cause unplanned portfolio turnover, hurt the portfolio performance of the Funds, and increase expenses of the Funds due to increased broker-dealer commissions and recordkeeping and related costs.

Shares of the Fund are listed and traded on a national securities exchange. Therefore, it is unlikely that a shareholder could take advantage of a potential arbitrage opportunity presented by a lag between a change in the value of the Fund’s portfolio securities after the close of the primary markets for the Fund’s portfolio securities and the reflection of that change in the Fund’s NAV (“market timing”), because the Fund sells and redeems its shares directly through transactions that are in-kind and/or for cash, with a deadline for placing cash-related transactions no later than the close of the primary markets for the Fund’s portfolio securities. Further, the Fund may impose transaction fees on purchases and redemptions of Creation Units to cover the custodial and other costs the Fund incurs in effecting trades which may help minimize the potential consequences of frequent purchases and redemptions of shares. For these reasons, the Board of Trustees believes that a frequent trading monitoring policy is unnecessary for the Fund. The Fund reserves the right, without prior written notice, to reject orders from APs that the Fund determines to be disruptive to the management of the Fund or otherwise not in the best interests of the Fund.

TAX CONSIDERATIONS

The following discussion summarizes some of the possible consequences under current federal tax law of an investment in the Fund. It is not a substitute for personal tax advice. You also may be subject to state, local, and/or foreign tax on Fund distributions and sales of Shares. Consult your personal tax advisor about the potential tax consequences of an investment in Shares under all applicable tax laws. For more information, please see the section entitled "Taxes" in the SAI.

Taxes

As with any investment, you should consider how your investment in Shares will be taxed. The tax information in this Prospectus is provided as general information. You should consult your own tax professional about the tax consequences of an investment in Shares.

Unless your investment in Shares is made through a tax-exempt entity or tax-deferred retirement account, such as an IRA plan, you need to be aware of the possible tax consequences when:

• the Fund makes distributions,

• you sell your Shares listed on the exchange, and

• you purchase or redeem Creation Units.

Taxes on Distributions

As stated above, dividends from net investment income and net capital gains, ordinarily, are declared and paid monthly or quarterly. The Fund also may pay a special distribution at the end of the calendar year to comply with federal tax requirements. In general, your distributions are subject to federal income tax when they are paid, whether you take them in cash or reinvest them in the Fund.

Dividends paid out of the Fund's income and net realized short-term capital gains, if any, are generally taxable as ordinary income, except that the Fund’s dividends attributable to its “qualified dividend income” (i.e., dividends received on stock of most domestic and foreign corporations, including Chinese corporations, with respect to which the Fund satisfies certain holding period and other restrictions) generally will be subject to federal income tax for individual and certain other non-corporate shareholders (each, an “individual shareholder”) who satisfy those restrictions with respect to their Fund shares at the lower rates for long-term capital gains—a maximum of 15% (or 20% for individual shareholders with taxable income exceeding certain thresholds, which will be adjusted annually for inflation after 2013). Distributions of net long-term capital gains, if any, in excess of net short-term capital losses are taxable as long-term capital gains, regardless of how long you have held the Shares.

Distributions in excess of the Fund's current and accumulated earnings and profits, if any, are treated as a tax-free return of capital to the extent of your basis in the Shares, and as capital gain thereafter. A distribution will reduce the Fund's NAV per Share and may be taxable to you as ordinary income or long-term capital gains even though, from an investment standpoint, the distribution may constitute a return of capital.

By law, the Fund may be required to withhold a percentage of your distributions and proceeds if you have not provided your taxpayer identification number or social security number.

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Taxes on Share Sales

Any capital gain or loss you realize upon a sale of Shares generally is treated as long-term capital gain, taxable at the rates mentioned above for individual shareholders, or loss if you held the Shares for more than one year and as short-term capital gain or loss if you held the Shares for one year or less. The ability to deduct capital losses may be limited.

Taxes on Purchase and Redemption of Creation Units

An AP who exchanges securities for Creation Units generally will recognize a gain or a loss. The gain or loss will be equal to the difference between the market value of the Creation Units at the time and the exchanger's aggregate basis in the securities surrendered and the cash component paid. A person who exchanges Creation Units for securities generally will recognize a gain or loss equal to the difference between the exchanger's basis in the Creation Units and the aggregate market value of the securities received and the cash redemption amount. The Internal Revenue Service, however, may assert that a loss realized upon an exchange of securities for Creation Units cannot be deducted currently under the rules governing "wash sales," or on the basis that there has been no significant change in economic position. Persons exchanging securities should consult their own tax advisors with respect to whether wash sale rules apply and when a loss might be deductible.

Any capital gain or loss realized upon redemption of Creation Units generally is treated as long-term capital gain or loss if the Shares have been held for more than one year and as a short-term capital gain or loss if the Shares have been held for one year or less.

DISTRIBUTION PLANS AND INTERMEDIARY COMPENSATION

Distribution and/or Service (12b-1) Fees

The Trust has adopted a distribution plan for the Fund pursuant to Rule 12b-1 under the Investment Company Act. Under the 12b-1 Plan, the Fund is authorized to pay fees for distribution related expenses and/or for providing services to shareholders of up to 0.25% of the Fund’s average daily net assets each year.

No 12b-1 fees are currently paid by the Fund, and there are no current plans to impose these fees.

However, in the event the Board of Trustees approves charging 12b-1 fees in the future, because Rule 12b-1 fees are paid out of Fund assets and are ongoing fees, over time they will increase the cost of your investment in the Fund and may cost you more than other types of sales charges.

Additional Payments to Intermediaries

Shares of the Fund are sold primarily through intermediaries, such as brokers, dealers, investment advisors, banks, trust companies, pension plan consultants, retirement plan administrators and insurance companies.

PGI and its affiliates may, out of their own resources, pay amounts to intermediaries that support the distribution or marketing of shares of the Fund or provide services to Fund shareholders.

In some cases, PGI, the Distributor, or their respective affiliates will provide payments or reimbursements in connection with the costs of conferences and seminars, and educational, training and marketing efforts related to the Fund. Such activities may be sponsored by intermediaries, PGI, the Distributor, or their respective affiliates. Additional costs paid or reimbursed may include travel, lodging, entertainment, meals and small gifts. In some cases, PGI, the Distributor, or their respective affiliates will also provide payment or reimbursement for expenses associated with transactions ("ticket") charges and general marketing expenses. For more information, see the SAI.

The payments described in this prospectus may create a conflict of interest by influencing your Financial Professional or your intermediary to recommend the Fund over another investment. Ask your Financial Professional or visit your intermediary's website for more information about the total amounts paid to them by PGI and its affiliates, and by sponsors of other investment companies your Financial Professional may recommend to you.

Your intermediary may charge you additional fees other than those disclosed in this prospectus. Ask your Financial Professional about any fees and commissions they charge.

FUND ACCOUNT INFORMATION

Continuous Offering

The method by which Creation Unit Aggregations are created and traded may raise certain issues under applicable securities laws. Because new Creation Unit Aggregations of Shares are issued and sold by the Fund on an ongoing basis, a "distribution," as such term is used in the Securities Act of 1933, as amended (the "Securities Act"), may occur at any point. Broker-dealers and other persons are cautioned that some activities on their part may, depending on the circumstances, result in their being deemed participants in a distribution in a manner which could render them statutory underwriters and subject them to the prospectus delivery requirement and liability provisions of the Securities Act.

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For example, a broker-dealer firm or its client may be deemed a statutory underwriter if it takes Creation Unit Aggregations after placing an order with the Distributor, breaks them down into constituent Shares and sells such Shares directly to customers, or if it chooses to couple the creation of a supply of new Shares with an active selling effort involving solicitation of secondary market demand for Shares. A determination of whether one is an underwriter for purposes of the Securities Act must take into account all the facts and circumstances pertaining to the activities of the broker-dealer or its client in the particular case, and the examples mentioned above should not be considered a complete description of all the activities that could lead to a characterization as an underwriter.

Broker-dealer firms also should note that dealers who are not "underwriters" but are effecting transactions in Shares, whether or not participating in the distribution of Shares, generally are required to deliver a prospectus. This is because the prospectus delivery exemption in Section 4(a)(3)(C) of the Securities Act is not available in respect of such transactions as a result of Section 24(d) of the 1940 Act. As a result, broker-dealer firms should note that dealers who are not "underwriters" but are participating in a distribution (as contrasted with engaging in ordinary secondary market transactions), and thus dealing with the Shares that are part of an overallotment within the meaning of Section 4(a)(3)(C) of the Securities Act, will be unable to take advantage of the prospectus delivery exemption provided by Section 4(a)(3) of the Securities Act. For delivery of prospectuses to exchange members, the prospectus delivery mechanism of Rule 153 under the Securities Act only is available with respect to transactions on a national exchange.

Reservation of Rights

The Trust reserves the right to amend or terminate the Fund, as well as certain terms related to the Fund, described in this prospectus. Shareholders will be notified of any such action to the extent required by law.

Multiple Translations

This prospectus may be translated into other languages. In the event of any inconsistencies or ambiguity as to the meaning of any word or phrase in a translation, the English text will prevail.

Financial Statements

Shareholders will receive annual financial statements for the Fund, audited by the Fund’s independent registered public accounting firm. Shareholders will also receive a semiannual financial statement that is unaudited.

Section 12(d)(1)

Section 12(d)(1) of the 1940 Act restricts investments by investment companies in the securities of other investment companies. However, registered investment companies are permitted to invest in the Fund beyond the limits set forth in Section 12(d)(1) subject to certain terms and conditions set forth in an SEC exemptive order issued to the Trust, including that such investment companies enter into an agreement with the Trust on behalf of the Fund prior to exceeding the limits imposed by Section 12(d)(1).

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APPENDIX A – DESCRIPTION OF BOND RATINGS

Moody's Investors Service, Inc. Rating Definitions :

Long-Term Obligation Ratings

Ratings assigned on Moody's global long-term obligation rating scales are forward-looking opinions of the relative credit risk of financial obligations issued by non-financial corporates, financial institutions, structured finance vehicles, project finance vehicles, and public sector entities. Long-term ratings are assigned to issuers or obligations with an original maturity of one year or more and reflect both on the likelihood of default on contractually promised payments and the expected financial loss suffered in the event of default. ¹ 

¹ For certain structured finance, preferred stock and hybrid securities in which payment default events are either not defined or do not match investor’s expectations for timely payment , the ratings reflect the likelihood of impairment and the expected financial loss in the event of impairment.

Aaa: Obligations rated Aaa are judged to be of the highest quality, subject to the lowest level of credit risk.

Aa: Obligations rated Aa are judged to be of high quality and are subject to very low credit risk.

A: Obligations rated A are considered upper-medium grade and are subject to low credit risk.

Baa: Obligations rated Baa are subject to moderate credit risk. They are considered medium-grade and as such may possess certain speculative characteristics.

Ba: Obligations rated Ba are judged to be speculative and are subject to substantial credit risk.

B: Obligations rated B are considered speculative and are subject to high credit risk.

Caa: Obligations rated Caa are judged to be speculative of poor standing and are subject to very high credit risk.

Ca: Obligations rated Ca are highly speculative and are likely in, or very near, default, with some prospect of recovery of principal and interest.

C: Obligations rated C are the lowest rated class of bonds and are typically in default, with little prospect for recovery of principal or interest.

NOTE: Moody's appends numerical modifiers, 1, 2, and 3 to each generic rating classification from Aa through Caa. The modifier 1 indicates that the obligation ranks in the higher end of its generic rating category, the modifier 2 indicates a mid-range ranking, and the modifier 3 indicates a ranking in the lower end of that generic rating category. Additionally, a “(hyb)” indicator is appended to all ratings of hybrid securities issued by banks, issuers, financial companies, and securities firms.*

* By their terms, hybrid securities allow for the omission of scheduled dividends, interest, or principal payments, which can potentially result in impairment if such an omission occurs. Hybrid securities may also be subject to contractually allowable write-downs of principal that could result in impairment. Together the hybrid indicator, the long-term obligation rating assigned to a hybrid security is an expression of the relative credit risk associated with that security.

SHORT-TERM NOTES: Short-term ratings are assigned to obligations with an original maturity of thirteen months or less and reflect both on the likelihood of a default on contractually promised payments and the expected financial loss suffered in the event of default. Moody's employs the following three designations, all judged to be investment grade, to indicate the relative repayment ability of rated issuers:

Issuers rated Prime-1 (or related supporting institutions) have a superior ability to repay short-term debt obligations.

Issuers rated Prime-2 (or related supporting institutions) have a strong ability to repay short-term debt obligations.

Issuers rated Prime-3 (or related supporting institutions) have an acceptable ability to repay short-term promissory obligations.

Issuers rated Not Prime do not fall within any of the Prime rating categories.

US MUNICIPAL SHORT-TERM DEBT: The Municipal Investment Grade (MIG) scale is used to rate US municipal bonds of up to five years maturity. MIG ratings are divided into three levels - MIG 1 through MIG 3 - while speculative grade short-term obligations are designated SG.

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MIG 1 denotes superior credit quality, afforded excellent protection from highly reliable liquidity support, or demonstrated broad-based access to the market for refinancing.

MIG 2 denotes strong credit quality with ample margins of protection, although not as large as in the preceding group.

MIG 3 notes are of acceptable credit quality. Liquidity and cash-flow protection may be narrow and market access for refinancing is likely to be less well-established.

SG denotes speculative-grade credit quality and may lack sufficient margins of protection.

Description of S&P Global Ratings' Credit Rating Definitions:

S&P Global's credit rating, both long-term and short-term, is a forward-looking opinion of the creditworthiness of an obligor with respect to a specific obligation. This assessment takes into consideration the creditworthiness of guarantors, insurers, or other forms of credit enhancement on the obligation.

The credit rating is not a recommendation to purchase, sell or hold a security, inasmuch as it does not comment as to market price or suitability for a particular investor.

The ratings are statements of opinion as of the date they are expressed furnished by the issuer or obtained by S&P Global Ratings from other sources S&P Global Ratings considers reliable. S&P Global Ratings does not perform an audit in connection with any rating and may, on occasion, rely on unaudited financial information. The ratings may be changed, suspended, or withdrawn as a result of changes in, or unavailability of, such information, or for other circumstances.

The ratings are based, in varying degrees, on the following considerations:

• Likelihood of payment - capacity and willingness of the obligor to meet its financial commitment on an obligation in accordance with the terms of the obligation;

• Nature of and provisions of the financial obligation;

• Protection afforded by, and relative position of, the financial obligation in the event of bankruptcy, reorganization, or other arrangement under the laws of bankruptcy and other laws affecting creditor's rights.

LONG-TERM CREDIT RATINGS:

AAA: Obligations rated ‘AAA’ have the highest rating assigned by S&P Global Ratings. The obligor’s capacity to meet its financial commitment on the obligation is extremely strong.

AA: Obligations rated ‘AA’ differ from the highest-rated issues only in small degree. The obligor’s capacity to meet its financial commitment on the obligation is very strong.

A: Obligations rated ‘A’ have a strong capacity to meet financial commitment on the obligation although they are somewhat more susceptible to the adverse effects of changes in circumstances and economic conditions than obligations in higher-rated categories.

BBB: Obligations rated ‘BBB’ exhibit adequate protection parameters; however, adverse economic conditions or changing circumstances are more likely to lead to a weakened capacity to meet financial commitment on the obligation.

BB, B, CCC, Obligations rated ‘BB’, ‘B’, ‘CCC’, ‘CC’, and ‘C’ are regarded, on balance, as having significant

CC, and C: speculative characteristics. ‘BB’ indicates the lowest degree of speculation and ‘C’ the highest degree of speculation. While such obligations will likely have some quality and protective characteristics, these may be outweighed by large uncertainties or major risk exposures to adverse conditions.

BB: Obligations rated ‘BB’ are less vulnerable to nonpayment than other speculative issues. However it faces major ongoing uncertainties or exposure to adverse business, financial, or economic conditions which could lead to the obligor’s inadequate capacity to meet its financial commitment on the obligation.

B: Obligations rated ‘B’ are more vulnerable to nonpayment than ‘BB’ but the obligor currently has the capacity to meet its financial commitment on the obligation. Adverse business, financial, or economic conditions will likely impair this capacity.

CCC: Obligations rated ‘CCC’ are currently vulnerable to nonpayment and is dependent upon favorable business, financial, and economic conditions for the obligor to meet its financial commitment on the obligation. If adverse business, financial, or economic conditions occur, the obligor is not likely to have the capacity to meet its financial commitment on the obligation.

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CC: Obligations rated ‘CC’ are currently highly vulnerable to nonpayment. The ‘CC’ rating is used when a default has not yet occurred but S&P Global Ratings expects default to be a virtual certainty, regardless of anticipated time to default.

C: The rating ‘C’ is highly vulnerable to nonpayment, the obligation is expected to have lower relative seniority or lower ultimate recovery compared to higher rated obligations.

D: Obligations rated ‘D’ are in default, or in breach of an imputed promise. For non-hybrid capital instruments, the ‘D’ rating category is used when payments on an obligation are not made on the date due, unless S&P Global Ratings believes that such payments will be made within five business days in the absence of a stated grace period or within the earlier of the stated grace period or 30 calendar days. The rating will also be used upon filing for bankruptcy petition or the taking of similar action and where default is a virtual certainty. If an obligation is subject to a distressed exchange offer the rating is lowered to ‘D’.

Plus (+) or Minus (-): The ratings from ‘AA’ to ‘CCC’ may be modified by the addition of a plus or minus sign to show relative standing within the major rating categories.

NR: Indicates that no rating has been requested, that there is insufficient information on which to base a rating or that S&P Global Ratings does not rate a particular type of obligation as a matter of policy.

SHORT-TERM CREDIT RATINGS: Ratings are graded into four categories, ranging from ‘A-1’ for the highest quality obligations to ‘D’ for the lowest.

A-1: This is the highest category. The obligor’s capacity to meet its financial commitment on the obligation is strong. Within this category, certain obligations are designated with a plus sign (+). This indicates that the obligor’s capacity to meet its financial commitment on these obligations is extremely strong.

A-2: Issues carrying this designation are somewhat more susceptible to the adverse effects of the changes in circumstances and economic conditions than obligations in higher rating categories. However, the obligor’s capacity to meet its financial commitment on the obligation is satisfactory.

A-3: Issues carrying this designation exhibit adequate capacity to meet their financial obligations. However, adverse economic conditions or changing circumstances are more likely to lead to a weakened capacity of the obligor to meet it financial commitment on the obligation.

B: Issues rated ‘B’ are regarded as vulnerable and have significant speculative characteristics. The obligor has capacity to meet financial commitments; however, it faces major ongoing uncertainties which could lead to obligor’s inadequate capacity to meet its financial obligations.

C: This rating is assigned to short-term debt obligations that are currently vulnerable to nonpayment and is dependent upon favorable business, financial, and economic conditions to meet its financial commitment on the obligation.

D: This rating indicates that the issue is either in default or in breach of an imputed promise. For non-hybrid capital instruments, the ‘D’ rating category is used when payments on an obligation are not made on the date due, unless S&P Global Ratings believes that such payments will be made within five business days in the absence of a stated grace period or within the earlier of the stated grace period or 30 calendar days. The rating will also be used upon filing for bankruptcy petition or the taking of similar action and where default is a virtual certainty. If an obligation is subject to a distressed exchange offer the rating is lowered to ‘D’.

MUNICIPAL SHORT-TERM NOTE RATINGS: S&P Global Ratings rates U.S. municipal notes with a maturity of less than three years as follows:

SP-1: A strong capacity to pay principal and interest. Issues that possess a very strong capacity to pay debt service is given a "+" designation.

SP-2: A satisfactory capacity to pay principal and interest, with some vulnerability to adverse financial and economic changes over the terms of the notes.

SP-3: A speculative capacity to pay principal and interest.

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ADDITIONAL INFORMATION

Additional information about the Fund is available in the Statement of Additional Information dated November 1, 2018, as amended and restated April 8, 2019, which is incorporated by reference into this prospectus. Additional information about the Fund’s investments is available in the Fund’s annual and semi-annual reports to shareholders. In the Fund’s annual report, you will find a discussion of the market conditions and investment strategies that significantly affected the Fund’s performance during the last fiscal year. The Statement of Additional Information and the Fund’s annual and semi-annual reports can be obtained free of charge by writing Principal Exchange Traded Funds, c/o ALPS Distributors, Inc., 1290 Broadway, Suite 1100, Denver, CO 80203. In addition, the Fund makes its Statement of Additional Information and annual and semi-annual reports available, free of charge, on our website www.principalfunds.com/etf-funds. To request this and other information about the Fund and to make shareholder inquiries, telephone 1-800-787-1621.

Information about the Fund (including the Statement of Additional Information) can be reviewed and copied at the Securities and Exchange Commission’s Public Reference Room in Washington, D.C. Information on the operation of the Public Reference Room may be obtained by calling the Commission at 1-202-551-8090. Reports and other information about the Fund are available on the EDGAR Database on the Commission’s internet site at www.sec.gov. Copies of this information may be obtained, upon payment of a duplicating fee, by electronic request at the following e-mail address: publicinfo@sec.gov, or by writing the Commission’s Public Reference Section, 100 F Street, N.E., Washington, D.C. 20549-1520.

The Fund has entered into a management agreement with Principal Global Investors, LLC (“PGI”). The Fund and/or PGI, on behalf of the Fund, enter into contractual arrangements with various parties, including, among others, the Fund’s distributor, transfer agent and custodian, who provide services to the Fund. These arrangements are between the Fund and/or PGI and the applicable service provider. Shareholders are not parties to, or intended to be third-party beneficiaries of, any of these arrangements. Such arrangements are not intended to create in any individual shareholder or group of shareholders any right, including the right to enforce such arrangements against the service providers or to seek any remedy thereunder against PGI or any other service provider, either directly or on behalf of the Fund or any individual series (or fund).

This prospectus provides information that you should consider in determining whether to purchase shares of the Fund. This prospectus, the Statement of Additional Information, or the contracts that are exhibits to the Fund’s registration statement are not intended to give rise to any agreement or contract between the Fund and/or any fund and any investor, or give rise to any contract or other rights in any individual shareholder, group of shareholders or other person other than any rights conferred explicitly by federal or state securities laws that may not be waived.

The U.S. government does not insure or guarantee an investment in the Fund.

Shares of the Fund are not deposits or obligations of, or guaranteed or endorsed by, Principal Bank or any other financial institution, nor are shares of the Fund federally insured by the Federal Deposit Insurance Corporation, the Federal Reserve Board, or any other agency.

Principal Exchange-Traded Funds SEC File 811-23029

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PRINCIPAL EXCHANGE-TRADED FUNDS

Statement of Additional Information

dated November 1, 2018, as amended and restated April 8, 2019

This Statement of Additional Information ("SAI") is not a prospectus. It contains information in addition to the information in the Fund's prospectus. The prospectus, which we may amend from time to time, contains the basic information you should know before investing in the Fund. You should read this SAI together with the Fund’s prospectus dated November 1, 2018 for the Principal Active Global Dividend Income, Principal Contrarian Value Index, Principal EDGE Active Income, Principal Healthcare Innovators Index, Principal International Multi-Factor Index, Principal Investment Grade Corporate Active, Principal Millennials Index, Principal Price Setters Index, Principal Shareholder Yield Index, Principal Spectrum Preferred Securities Active, Principal Sustainable Momentum Index, Principal U.S. Mega-Cap Multi-Factor Index and Principal U.S. Small-Cap Multi-Factor Index ETFs, and April 8, 2019 for the Principal Ultra-Short Active Income ETF.

Incorporation by Reference: The audited financial statements, schedules of investments and auditor’s report included in the Fund’s Annual Report to Shareholders, for the fiscal year ended June 30, 2018 and the unaudited financial statements and schedules of investments included in the Fund’s Semiannual Report to Shareholders, for the period ended December 31, 2018, are hereby incorporated by reference into and are legally a part of this SAI.

For a free copy of the current prospectus, semiannual or annual report, call 1-800-787-1621 or write:

Principal Exchange-Traded Funds

c/o ALPS Distributors, Inc.

1290 Broadway, Suite 1100

Denver, CO 80203

The prospectus may be viewed at www.principalfunds.com/etf-funds.

Effective May 1, 2019, Principal EDGE Active Income ETF will change its name to Principal Active Income ETF. On that date, delete all references in this Statement of Additional Information to Principal EDGE Active Income ETF, and replace with Principal Active Income ETF.

Fund	Ticker Symbol	Principal U.S. Listing Exchange
Principal Active Global Dividend Income ETF	GDVD	Cboe BZX Exchange, Inc.
Principal Contrarian Value Index ETF	PVAL	The Nasdaq Stock Market LLC
Principal EDGE Active Income ETF	YLD	NYSE Arca
Principal Healthcare Innovators Index ETF	BTEC	The Nasdaq Stock Market LLC
Principal International Multi-Factor Index ETF	PXUS	The Nasdaq Stock Market LLC
Principal Investment Grade Corporate Active ETF	IG	NYSE Arca
Principal Millennials Index ETF	GENY	The Nasdaq Stock Market LLC
Principal Price Setters Index ETF	PSET	The Nasdaq Stock Market LLC
Principal Shareholder Yield Index ETF	PY	The Nasdaq Stock Market LLC
Principal Spectrum Preferred Securities Active ETF	PREF	Cboe BZX Exchange, Inc.
Principal Sustainable Momentum Index ETF	PMOM	The Nasdaq Stock Market LLC
Principal Ultra-Short Active Income ETF	USI	NYSE Arca
Principal U.S. Mega-Cap Multi-Factor Index ETF	USMC	The Nasdaq Stock Market LLC
Principal U.S. Small-Cap Multi-Factor Index ETF	PSC	The Nasdaq Stock Market LLC

TABLE OF CONTENTS
GENERAL DESCRIPTION OF TRUST AND FUNDS	3
EXCHANGE LISTING AND TRADING	3
DESCRIPTION OF THE FUNDS' INVESTMENTS AND RISKS	3
LEADERSHIP STRUCTURE AND BOARD OF TRUSTEES	33
INVESTMENT ADVISORY AND OTHER SERVICES	42
INTERMEDIARY COMPENSATION	51
PURCHASE AND REDEMPTION OF CREATION UNITS	51
CALCULATION OF NAV	61
TAX CONSIDERATIONS	62
PORTFOLIO HOLDINGS DISCLOSURE	63
PROXY VOTING POLICIES AND PROCEDURES	64
FINANCIAL STATEMENTS	64
INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM	64
CONTROL PERSONS AND PRINCIPAL HOLDERS OF SECURITIES	64
PORTFOLIO MANAGER DISCLOSURE	66
APPENDIX A – DESCRIPTION OF BOND RATINGS	74
APPENDIX B – FOREIGN MARKET HOLIDAYS	77
APPENDIX C – PROXY VOTING POLICIES	82

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GENERAL DESCRIPTION OF TRUST AND FUNDS

Principal Exchange-Traded Funds (the "Trust") is a statutory trust organized under the laws of the State of Delaware in 2013 and is authorized to have multiple series or portfolios (each, a "Fund"). The Trust is an open-end management investment company, registered under the Investment Company Act of 1940, as amended (the "1940 Act"). The Trust currently consists of 14 Funds.

The shares of the Funds are referred to herein as "Shares."

The Trust issues and redeems Shares at net asset value ("NAV") only with Authorized Participants (“APs”) and only in aggregations of 50,000 Shares (each a "Creation Unit" or a "Creation Unit Aggregation"), which is subject to change. Each Fund issues and redeems Creation Units in exchange for portfolio securities and/or cash, plus a fixed and/or variable transaction fee.

EXCHANGE LISTING AND TRADING

Shares of each Fund are listed on a national securities exchange (the "Exchange") as set forth below. Shares trade on the Exchange at market prices that may be below, at, or above NAV.

Fund	Principal U.S. Listing Exchange
Principal Active Global Dividend Income ETF	Cboe BZX Exchange, Inc.
Principal Contrarian Value Index ETF	The Nasdaq Stock Market LLC
Principal EDGE Active Income ETF	NYSE Arca
Principal Healthcare Innovators Index ETF	The Nasdaq Stock Market LLC
Principal International Multi-Factor Index ETF	The Nasdaq Stock Market LLC
Principal Investment Grade Corporate Active ETF	NYSE Arca
Principal Millennials Index ETF	The Nasdaq Stock Market LLC
Principal Price Setters Index ETF	The Nasdaq Stock Market LLC
Principal Shareholder Yield Index ETF	The Nasdaq Stock Market LLC
Principal Spectrum Preferred Securities Active ETF	Cboe BZX Exchange, Inc.
Principal Sustainable Momentum Index ETF	The Nasdaq Stock Market LLC
Principal Ultra-Short Active Income ETF	NYSE Arca
Principal U.S. Mega-Cap Multi-Factor Index ETF	The Nasdaq Stock Market LLC
Principal U.S. Small-Cap Multi-Factor Index ETF	The Nasdaq Stock Market LLC

There can be no assurance that a Fund will continue to meet the requirements of the Exchange necessary to maintain the listing of its Shares. The Exchange may, but is not required to, remove the Shares of a Fund from listing if: (i) following the initial 12-month period beginning at the commencement of trading of the Fund, there are fewer than 50 beneficial owners of the Shares of the Fund for 30 or more consecutive trading days; or (ii) such other event shall occur or condition shall exist that, in the opinion of the Exchange, makes further dealings on such Exchange inadvisable. The Exchange will remove the Shares of a Fund from listing and trading upon termination of the Fund.

As in the case of other stocks traded on the Exchange, brokers' commissions on transactions will be based on negotiated commission rates at customary levels.

The Trust reserves the right to adjust the price levels of the Shares in the future to help maintain convenient trading ranges for investors. Any adjustments would be accomplished through stock splits or reverse stock splits, which would have no effect on the net assets of a Fund.

DESCRIPTION OF THE FUNDS' INVESTMENTS AND RISKS

Fund Policies

The investment objective, principal investment strategies and principal risks of each Fund are described in the Fund's Prospectus. This Statement of Additional Information contains supplemental information about those strategies and risks and the types of securities that those managing the investments of each Fund can select. Additional information is also provided about other strategies that each Fund may use to try to achieve its objective.

The composition of each Fund and the techniques and strategies that those managing the investments of the Fund may use in selecting securities will vary over time. A Fund is not required to use all of the investment techniques and strategies available to it in seeking its goals.

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Unless otherwise indicated, with the exception of the percentage limitations on borrowing, the restrictions apply at the time transactions are entered into. Accordingly, any later increase or decrease beyond the specified limitation, resulting from market fluctuations or in a rating by a rating service, does not require elimination of any security from a Fund’s portfolio.

The investment objective of each Fund and, except as described below as "Fundamental Restrictions," the investment strategies described in this Statement of Additional Information and the Prospectus are not fundamental and may be changed by the Board of Trustees without shareholder approval.

The Funds are "diversified," as that term is used in the Investment Company Act of 1940, as amended (the "1940 Act"), and as interpreted, modified or otherwise permitted by regulatory authority having jurisdiction, from time to time.

With the exception of the diversification test required by the Internal Revenue Code, the Funds will not consider collateral held in connection with securities lending activities when applying any of the following fundamental restrictions or any other investment restriction set forth in each Fund's Prospectus or Statement of Additional Information.

Fundamental Restrictions

Except as specifically noted, each Fund has adopted the following fundamental restrictions. Each fundamental restriction is a matter of fundamental policy and may not be changed without a vote of a majority of the outstanding voting securities of the affected Fund. The 1940 Act provides that "a vote of a majority of the outstanding voting securities" of a Fund means the affirmative vote of the lesser of 1) more than 50% of the outstanding shares or 2) 67% or more of the shares present at a meeting if more than 50% of the outstanding Fund shares are represented at the meeting in person or by proxy. Each share has one vote.

Each Fund:

1) May not issue senior securities, except as permitted under the 1940 Act, as amended, and as interpreted, modified or otherwise permitted by regulatory authority having jurisdiction, from time to time.

2) May not purchase or sell commodities, except as permitted under the 1940 Act, as amended, and as interpreted, modified or otherwise permitted by regulatory authority having jurisdiction, from time to time.

3) May not purchase or sell real estate, which term does not include securities of companies which deal in real estate or mortgages or investments secured by real estate or interests therein, except that the Fund reserves freedom of action to hold and to sell real estate acquired as a result of the Fund’s ownership of securities.

4) May not borrow money, except as permitted under the 1940 Act, as amended, and as interpreted, modified or otherwise permitted by regulatory authority having jurisdiction, from time to time.

5) May not make loans except as permitted under the 1940 Act, as amended, and as interpreted, modified or otherwise permitted by regulatory authority having jurisdiction, from time to time.

6) Has elected to be treated as a “diversified” investment company, as that term is used in the 1940 Act, as amended, and as interpreted, modified or otherwise permitted by regulatory authority having jurisdiction, from time to time.

7) Has adopted a concentration policy as follows:

a. The Principal Spectrum Preferred Securities Active ETF and Principal Ultra Short Active Income ETF each concentrates its investments in securities in the financial services (i.e., banking, insurance and commercial finance) industry.

b. Each index ETF will not concentrate its investments in a particular industry except to the extent its underlying index is so concentrated. Given the present composition of its underlying index, the Principal Healthcare Innovators Index ETF expects to have more than 25% of its assets invested in the healthcare industry.

c. Each of the remaining Funds may not concentrate, as that term is used in the 1940 Act, its investments in a particular industry, except as permitted under the 1940 Act, as amended, and as interpreted, modified or otherwise permitted by regulatory authority having jurisdiction, from time to time.

8) May not act as an underwriter of securities, except to the extent that the Fund may be deemed to be an underwriter in connection with the sale of securities held in its portfolio.

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Non-Fundamental Restrictions

Except as specifically noted, each Fund has also adopted the following non-fundamental restrictions. Non-fundamental restrictions are not fundamental policies and may be changed without shareholder approval. It is contrary to each Fund's present policy to:

1) Invest more than 15% of its net assets in illiquid securities and in repurchase agreements maturing in more than seven days except to the extent permitted by applicable law or regulatory authority having jurisdiction, from time to time.

2) Pledge, mortgage, or hypothecate its assets, except to secure permitted borrowings. The deposit of underlying securities and other assets in escrow and other collateral arrangements in connection with transactions that involve any future payment obligation, as permitted under the 1940 Act, as amended, and as interpreted, modified or otherwise permitted by any regulatory authority having jurisdiction, from time to time, are not deemed to be pledges, mortgages, hypothecations, or other encumbrances.

3) Invest in companies for the purpose of exercising control or management.

4) Acquire securities of other investment companies in reliance on Section 12(d)(1)(F) or (G) of the 1940 Act, invest more than 10% of its total assets in securities of other investment companies, invest more than 5% of its total assets in the securities of any one investment company, or acquire more than 3% of the outstanding voting securities of any one investment company except in connection with a merger, consolidation, or plan of reorganization and except as permitted by the 1940 Act, SEC rules adopted under the 1940 Act or exemptions granted by the Securities and Exchange Commission. The Fund may purchase securities of closed-end investment companies in the open market where no underwriter or dealer’s commission or profit, other than a customary broker’s commission, is involved.

The Principal Spectrum Preferred Securities Active ETF has also adopted the following non-fundamental restriction. It is contrary to the Fund's present policy to:

1) Invest more than 5% of its total assets in real estate limited partnership interests.

Non-Fundamental Restriction - Rule 35d-1

With the exception of the Principal EDGE Active Income ETF, Each Fund has also adopted the non-fundamental policy, pursuant to SEC Rule 35d-1, which requires it, under normal circumstances, to invest at least 80% of its net assets, plus any borrowings for investment purposes, in the type of investments, industry or geographic region (as described in the prospectus) as suggested by the name of the Fund.

This policy applies at the time of purchase. The Fund will provide 60 days’ notice to shareholders prior to implementing a change in this policy for the Fund. For purposes of this non-fundamental restriction, the Fund tests market capitalization ranges monthly.

For purposes of testing this requirement with respect to:

• foreign currency investments, each Fund will count forward foreign currency contracts and other investments that have economic characteristics similar to foreign currency; the value of such contracts and investments will include the Fund’s investments in cash and/or cash equivalents to the extent such instruments are used to cover the Fund’s exposure under its forward foreign currency contracts and similar investments.

• derivatives instruments, each Fund will typically count the mark-to-market value of such derivatives. However, the Fund may use a derivative contract’s notional value when it determines that notional value is an appropriate measure of the Fund’s exposure to investments. For example, with respect to single name equity swaps which are “fully paid” (equity swaps in which cash and/or cash equivalents are specifically segregated on the Fund’s books for the purpose of covering the full notional value of the swap), each Fund will count the value of such cash and/or cash equivalents.

• investments in underlying funds (including ETFs), each Fund will count all investments in an underlying fund toward the requirement as long as 80% of the value of such underlying fund's holdings focus on the particular type of investment suggested by the Fund name.

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Investment Strategies and Risks Related to Borrowing and Senior Securities, Commodity-Related Investments, Industry Concentration and Loans

Borrowing and Senior Securities

Under the 1940 Act, a fund that borrows money is required to maintain continuous asset coverage (that is, total assets including borrowings, less liabilities exclusive of borrowings) of 300% of the amount borrowed, with an exception for borrowings not in excess of 5% of the fund’s total assets made for temporary or emergency purposes. If a Fund invests the proceeds of borrowing, borrowing will tend to exaggerate the effect on net asset value of any increase or decrease in the market value of a fund’s portfolio. If a Fund invests the proceeds of borrowing, money borrowed will be subject to interest costs that may or may not be recovered by earnings on the securities purchased. A fund also may be required to maintain minimum average balances in connection with a borrowing or to pay a commitment or other fee to maintain a line of credit; either of these requirements would increase the cost of borrowing over the stated interest rate.

Pursuant to SEC staff interpretations of the 1940 Act, a fund that purchases securities or makes other investments that have a leveraging effect on the fund (for example, reverse repurchase agreements) must segregate assets to render them not available for sale or other disposition in an amount equal to the amount the fund owes pursuant to the terms of the security or other investment.

Commodity-Related Investments

Under the 1940 Act, a fund's registration statement must recite the fund's policy with regard to investing in commodities. Each fund may invest in commodities to the extent permitted by applicable law and under its fundamental and non-fundamental policies and restrictions. Pursuant to a claim for exclusion filed with the Commodity Futures Trading Commission (“CFTC”) on behalf of each of the Funds, the Trust and the Funds are not deemed to be a “commodity pool” or “commodity pool operator” under the Commodity Exchange Act (“CEA”), and they are therefore not subject to registration or regulation under the CEA. The CFTC amended rule 4.5 “Exclusion for certain otherwise regulated persons from the definition of the term “commodity pool operator.” Rule 4.5 provides that an investment company does not meet the definition of “commodity pool operator” if its use of futures contracts, options on futures contracts and swaps is sufficiently limited that the fund can fall within one of two exclusions set out in rule 4.5. Each Fund intends to limit its use of futures contracts, options on futures contracts and swaps to the degree necessary to fall within one of the two exclusions. If a Fund is unable to do so, it may incur expenses that are necessary to comply with the CEA and rules the CFTC has adopted under it.

Industry Concentration

“Concentration” means a fund invests more than 25% of its net assets in a particular industry or group of industries. To monitor compliance with the policy regarding industry concentration, the Funds may use the industry classifications provided by Bloomberg, L.P., the MSCI/Standard & Poor's Global Industry Classification Standard (GICS), the Directory of Companies Filing Annual Reports with the Securities and Exchange Commission or any other reasonable industry classification system. Each Fund interprets its policy with respect to concentration in a particular industry to apply only to direct investments in the securities of issuers in a particular industry. For purposes of this restriction, government securities such as treasury securities or mortgage-backed securities that are issued or guaranteed by the U.S. government, its agencies or instrumentalities are not subject to a Fund’s industry concentration restrictions. Each Fund also views its investments in tax-exempt municipal securities as not representing interests in any particular industry or group of industries. For information about municipal securities, see the Municipal Obligations section.

Loans

A Fund may not make loans to other persons except as permitted by (i) the 1940 Act and the rules and regulations thereunder, or other successor law governing the regulation of registered investment companies, or interpretations or modifications thereof by the U.S. Securities and Exchange Commission (“SEC”), SEC staff or other authority of competent jurisdiction, or (ii) pursuant to exemptive or other relief or permission from the SEC, SEC staff or other authority of competent jurisdiction. Generally, this means the Funds are typically permitted to make loans, but must take into account potential issues such as liquidity, valuation, and avoidance of impermissible transactions. Examples of permissible loans include (a) the lending of its portfolio securities, (b) the purchase of debt securities, loan participations and/or engaging in direct corporate loans in accordance with its investment objectives and policies, (c) the entry into a repurchase agreement (to the extent such entry is deemed to be a loan), and (d) loans to affiliated investment companies to the extent permitted by the 1940 Act or any exemptions therefrom that may be granted by the SEC.

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Other Investment Strategies and Risks

Convertible Securities

A convertible security is a bond, debenture, note, preferred stock, or other security that entitles the holder to acquire common stock or other equity securities of the same or a different issuer. A convertible security generally entitles the holder to receive interest paid or accrued until the convertible security matures or is redeemed, converted or exchanged. Before conversion, convertible securities have characteristics similar to non-convertible debt or preferred securities, as applicable. Convertible securities rank senior to common stock in a corporation’s capital structure and, therefore, generally entail less risk than the corporation’s common stock, although the extent to which such risk is reduced depends in large measure upon the degree to which the convertible security sells above its value as a fixed income security. Convertible securities are subordinate in rank to any senior debt obligations of the issuer, and, therefore, an issuer’s convertible securities entail more risk than its debt obligations. Convertible securities generally offer lower interest or dividend yields than non-convertible debt securities of similar credit quality because of the potential for capital appreciation. In addition, convertible securities are often lower-rated securities.

Because of the conversion feature, the price of the convertible security will normally fluctuate in some proportion to changes in the price of the underlying asset, and as such is subject to risks relating to the activities of the issuer and/or general market and economic conditions. The income component of a convertible security may tend to cushion the security against declines in the price of the underlying asset. However, the income component of convertible securities causes fluctuations based upon changes in interest rates and the credit quality of the issuer.

If the conversion value of a convertible security increases to a point that approximates or exceeds its investment value, the value of the security will be principally influenced by its conversion value. A convertible security will sell at a premium over its conversion value to the extent investors place value on the right to acquire the underlying common stock while holding an income-producing security.

A convertible security may be subject to redemption at the option of the issuer at a predetermined price. If a convertible security held by a fund is called for redemption, the fund would be required to permit the issuer to redeem the security and convert it to underlying common stock, or would sell the convertible security to a third party, which may have an adverse effect on the fund’s ability to achieve its investment objective.

Corporate Reorganizations

Each Fund may invest in securities for which a tender or exchange offer has been made or announced and in securities of companies for which a merger, consolidation, liquidation or reorganization proposal has been announced if, in the judgment of those managing the Fund's investments, there is a reasonable prospect of capital appreciation significantly greater than the brokerage and other transaction expenses involved. The primary risk of such investments is that if the contemplated transaction is abandoned, revised, delayed or becomes subject to unanticipated uncertainties, the market price of the securities may decline below the purchase price paid by a Fund.

In general, securities which are the subject of such an offer or proposal sell at a premium to their historic market price immediately prior to the announcement of the offer or proposal. However, the increased market price of such securities may discount what the stated or appraised value of the security would be if the contemplated transaction were approved or consummated. Such investments may be advantageous when the discount significantly overstates the risk of the contingencies involved; significantly undervalues the securities, assets or cash to be received by shareholders of the prospective company as a result of the contemplated transaction; or fails adequately to recognize the possibility that the offer or proposal may be replaced or superseded by an offer or proposal of greater value. The evaluation of such contingencies requires unusually broad knowledge and experience on the part of those managing the Fund's investments, which must appraise not only the value of the issuer and its component businesses, but also the financial resources and business motivation of the offer or proposal as well as the dynamics of the business climate when the offer or proposal is in process.

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Cyber Security Issues

Each Fund and its service providers may be subject to cyber security risks. Those risks include, among others, theft, misuse or corruption of data maintained online or digitally; denial of service attacks on websites; the loss or unauthorized release of confidential and proprietary information; operational disruption; or various other forms of cyber security breaches. Cyber-attacks against or security breakdowns of a Fund or its service providers may harm the Fund and its shareholders, potentially resulting in, among other things, financial losses, the inability of Fund shareholders to transact business, inability to calculate a fund’s NAV, violations of applicable privacy and other laws, regulatory fines, penalties, reputational damage, reimbursement or other compensation costs, and/or additional compliance and remediation costs. Cyber security risks may also affect issuers of securities in which a fund invests, potentially causing the fund’s investment in such issuers to lose value. Despite risk management processes, there can be no guarantee that a fund will avoid losses relating to cyber security risks or other information security breaches.

Depositary Receipts

Depositary Receipts are generally subject to the same sort of risks as direct investments in a foreign country, such as, currency risk, political and economic risk, and market risk, because their values depend on the performance of a foreign security denominated in its home currency.

Each Fund may invest in foreign securities which means it may invest in:

• American Depositary Receipts ("ADRs") - receipts issued by an American bank or trust company evidencing ownership of underlying securities issued by a foreign issuer. They are designed for use in U.S. securities markets.

• European Depositary Receipts ("EDRs") and Global Depositary Receipts ("GDRs") - receipts typically issued by a foreign financial institution to evidence an arrangement similar to that of ADRs.

Depositary Receipts may be issued by sponsored or unsponsored programs. In sponsored programs, an issuer has made arrangements to have its securities traded in the form of Depositary Receipts. In unsponsored programs, the issuer may not be directly involved in the creation of the program. Although regulatory requirements with respect to sponsored and unsponsored programs are generally similar, in some cases it may be easier to obtain financial information from an issuer that has participated in the creation of a sponsored program. Accordingly, there may be less information available regarding issuers of securities of underlying unsponsored programs, and there may not be a correlation between the availability of such information and the market value of the Depositary Receipts.

Derivatives

Options on Securities and Securities Indices

Each Fund may engage in the practices described under this heading. Each Fund may write (sell) and purchase call and put options on securities in which it invests and on securities indices based on securities in which the Fund invests. Each Fund may engage in these transactions to hedge against a decline in the value of securities owned or an increase in the price of securities which the Fund plans to purchase, or to generate additional revenue.

• Exchange-Traded Options. An exchange-traded option may be closed out only on an exchange that generally provides a liquid secondary market for an option of the same series. If a liquid secondary market for an exchange-traded option does not exist, it might not be possible to effect a closing transaction with respect to a particular option, with the result that a Fund would have to exercise the option in order to consummate the transaction.

• Over the Counter ("OTC") Options. OTC options differ from exchange-traded options in that they are two-party contracts, with price and other terms negotiated between buyer and seller, and generally do not have as much market liquidity as exchange-traded options. An OTC option (an option not traded on an established exchange) may be closed out only by agreement with the other party to the original option transaction. With OTC options, a Fund is at risk that the other party to the transaction will default on its obligations or will not permit the Fund to terminate the transaction before its scheduled maturity. While a Fund will seek to enter into OTC options only with dealers who agree to or are expected to be capable of entering into closing transactions with a Fund, there can be no assurance that a Fund will be able to liquidate an OTC option at a favorable price at any time prior to its expiration. OTC options are not subject to the protections afforded purchasers of listed options by the Options Clearing Corporation or other clearing organizations. An exchange-traded option may be closed out only on an exchange that generally provides a liquid secondary market for an option of the same series. If a liquid secondary market for an exchange-traded option does not exist, it might not be possible to effect a closing transaction with respect to a particular option, with the result that a fund would have to exercise the option in order to consummate the transaction.

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Writing Call and Put Options. When a fund writes a call option, it gives the purchaser of the option the right to buy a specific security at a specified price at any time before the option expires. When a fund writes a put option, it gives the purchaser of the option the right to sell to the fund a specific security at a specified price at any time before the option expires. In both situations, the fund receives a premium from the purchaser of the option.

The premium received by a fund reflects, among other factors, the current market price of the underlying security, the relationship of the exercise price to the market price, the time period until the expiration of the option and interest rates. The premium generates additional income for the fund if the option expires unexercised or is closed out at a profit. By writing a call, a fund limits its opportunity to profit from any increase in the market value of the underlying security above the exercise price of the option, but it retains the risk of loss if the price of the security should decline. By writing a put, a fund assumes the risk that it may have to purchase the underlying security at a price that may be higher than its market value at time of exercise.

A Fund usually owns the underlying security covered by any outstanding call option. With respect to an outstanding put option, a Fund deposits and maintains with its custodian or segregates on the Fund's records, cash, or other liquid assets with a value at least equal to the market value of the option that was written.

Once a fund has written an option, it may terminate its obligation before the option is exercised. The fund executes a closing transaction by purchasing an option of the same series as the option previously written. The fund has a gain or loss depending on whether the premium received when the option was written exceeds the closing purchase price plus related transaction costs.

Purchasing Call and Put Options. When the fund purchases a call option, it receives, in return for the premium it pays, the right to buy from the writer of the option the underlying security at a specified price at any time before the option expires. A fund purchases call options in anticipation of an increase in the market value of securities that it intends ultimately to buy. During the life of the call option, the fund is able to buy the underlying security at the exercise price regardless of any increase in the market price of the underlying security. In order for a call option to result in a gain, the market price of the underlying security must exceed the sum of the exercise price, the premium paid, and transaction costs.

When a fund purchases a put option, it receives, in return for the premium it pays, the right to sell to the writer of the option the underlying security at a specified price at any time before the option expires. A fund purchases put options in anticipation of a decline in the market value of the underlying security. During the life of the put option, the fund is able to sell the underlying security at the exercise price regardless of any decline in the market price of the underlying security. In order for a put option to result in a gain, the market price of the underlying security must decline, during the option period, below the exercise price enough to cover the premium and transaction costs.

Once a fund purchases an option, it may close out its position by selling an option of the same series as the option previously purchased. The fund has a gain or loss depending on whether the closing sale price exceeds the initial purchase price plus related transaction costs.

Options on Securities Indices. Each Fund may purchase and sell put and call options on any securities index based on securities in which the Fund may invest. Securities index options are designed to reflect price fluctuations in a group of securities or segment of the securities market rather than price fluctuations in a single security. Options on securities indices are similar to options on securities, except that the exercise of securities index options requires cash payments and does not involve the actual purchase or sale of securities. Each Fund engages in transactions in put and call options on securities indices for the same purposes as they engage in transactions in options on securities. When a Fund writes call options on securities indices, it holds in its portfolio underlying securities which, in the judgment of those managing the Fund's investments, correlate closely with the securities index and which have a value at least equal to the aggregate amount of the securities index options.

Risks Associated with Option Transactions. An option position may be closed out only on an exchange that provides a secondary market for an option of the same series. A fund generally purchases or writes only those options for which there appears to be an active secondary market. However, there is no assurance that a liquid secondary market on an exchange exists for any particular option, or at any particular time. If a fund is unable to effect closing sale transactions in options it has purchased, it has to exercise its options in order to realize any profit and may incur transaction costs upon the purchase or sale of underlying securities. If the fund is unable to effect a closing purchase transaction for a covered option that it has written, it is not able to sell the underlying securities, or dispose of the assets held in a segregated account, until the option expires or is exercised. The fund's ability to terminate option positions established in the over-the-counter market may be more limited than for exchange-traded options and may also involve the risk that broker-dealers participating in such transactions might fail to meet their obligations.

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Futures Contracts and Options on Futures Contracts

Each Fund may purchase and sell futures contracts of many types, including for example, futures contracts covering indexes, financial instruments, and foreign currencies. Each Fund may purchase and sell financial futures contracts and options on those contracts. Financial futures contracts are commodities contracts based on financial instruments such as U.S. Treasury bonds or bills or on securities indices such as the S&P 500 Index. The Commodity Futures Trading Commission regulates futures contracts, options on futures contracts, and the commodity exchanges on which they are traded. Through the purchase and sale of futures contracts and related options, a fund may seek to hedge against a decline in the value of securities owned by the fund or an increase in the price of securities that the fund plans to purchase. Each Fund may also purchase and sell futures contracts and related options to maintain cash reserves while simulating full investment in securities and to keep substantially all of its assets exposed to the market. Each Fund may enter into futures contracts and related options transactions both for hedging and non-hedging purposes.

Futures Contracts. Each Fund may purchase or sell a futures contract to gain exposure to a particular market asset without directly purchasing that asset. When a fund sells a futures contract based on a financial instrument, the fund is obligated to deliver that kind of instrument at a specified future time for a specified price. When a fund purchases that kind of contract, it is obligated to take delivery of the instrument at a specified time and to pay the specified price. In most instances, these contracts are closed out by entering into an offsetting transaction before the settlement date. The fund realizes a gain or loss depending on whether the price of an offsetting purchase plus transaction costs are less or more than the price of the initial sale or on whether the price of an offsetting sale is more or less than the price of the initial purchase plus transaction costs. Although the fund usually liquidates futures contracts on financial instruments, by entering into an offsetting transaction before the settlement date, they may make or take delivery of the underlying securities when it appears economically advantageous to do so.

A futures contract based on a securities index provides for the purchase or sale of a group of securities at a specified future time for a specified price. These contracts do not require actual delivery of securities but result in a cash settlement. The amount of the settlement is based on the difference in value of the index between the time the contract was entered into and the time it is liquidated (at its expiration or earlier if it is closed out by entering into an offsetting transaction).

When a fund purchases or sells a futures contract, it pays a commission to the futures commission merchant through which the fund executes the transaction. When entering into a futures transaction, the fund does not pay the execution price, as it does when it purchases a security, or a premium, as it does when it purchases an option. Instead, the fund deposits an amount of cash or other liquid assets (generally about 5% of the futures contract amount) with its futures commission merchant. This amount is known as "initial margin." In contrast to the use of margin account to purchase securities, the fund's deposit of initial margin does not constitute the borrowing of money to finance the transaction in the futures contract. The initial margin represents a good faith deposit that helps assure the fund's performance of the transaction. The futures commission merchant returns the initial margin to the fund upon termination of the futures contract if the fund has satisfied all its contractual obligations.

Subsequent payments to and from the futures commission merchant, known as "variation margin," are required to be made on a daily basis as the price of the futures contract fluctuates, a process known as "marking to market." The fluctuations make the long or short positions in the futures contract more or less valuable. If the position is closed out by taking an opposite position prior to the settlement date of the futures contract, a final determination of variation margin is made. Any additional cash is required to be paid to or released by the broker and the fund realizes a loss or gain.

In using futures contracts, a fund may seek to establish with more certainty than would otherwise be possible the effective price of or rate of return on portfolio securities or securities that the fund proposes to acquire. A fund, for example, sells futures contracts in anticipation of a rise in interest rates that would cause a decline in the value of its debt investments. When this kind of hedging is successful, the futures contract increases in value when the fund's debt securities decline in value and thereby keeps the fund's net asset value from declining as much as it otherwise would. A fund may also sell futures contracts on securities indices in anticipation of or during a stock market decline in an endeavor to offset a decrease in the market value of its equity investments. When a fund is not fully invested and anticipates an increase in the cost of securities it intends to purchase, it may purchase financial futures contracts.

When increases in the prices of equities are expected, a fund may purchase futures contracts on securities indices in order to gain rapid market exposure that may partially or entirely offset increases in the cost of the equity securities it intends to purchase.

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With respect to futures contracts that settle in cash, a Fund will cover (and mark-to-market on a daily basis) liquid assets that, when added to the amounts deposited with a futures commission merchant as margin, are equal to the market value of the futures contract. When entering into futures contracts that do not settle in cash (physically-settled futures contracts), a Fund will maintain with its custodian (and mark-to-market on a daily basis) liquid assets that, when added to the amounts deposited with a futures commission merchant as margin, are equal to the full notional value of the contract. Physically-settled futures contracts (and written options on such contracts) will be treated like cash-settled futures contracts when a Fund has entered into a contractual arrangement with a third party futures commission merchant or other counterparty to offset the Fund’s exposure under the contract and, failing that, to assign its delivery obligation under the contract to the counterparty.

Options on Futures Contracts. Each Fund may also purchase and write call and put options on futures contracts. A call option on a futures contract gives the purchaser the right, in return for the premium paid, to purchase a futures contract (assume a long position) at a specified exercise price at any time before the option expires. A put option gives the purchaser the right, in return for the premium paid, to sell a futures contract (assume a short position), for a specified exercise price, at any time before the option expires.

Upon the exercise of a call, the writer of the option is obligated to sell the futures contract (to deliver a long position to the option holder) at the option exercise price, which will presumably be lower than the current market price of the contract in the futures market. Upon exercise of a put, the writer of the option is obligated to purchase the futures contract (deliver a short position to the option holder) at the option exercise price, which will presumably be higher than the current market price of the contract in the futures market. However, as with the trading of futures, most options are closed out prior to their expiration by the purchase or sale of an offsetting option at a market price that reflects an increase or a decrease from the premium originally paid. Options on futures can be used to hedge substantially the same risks addressed by the direct purchase or sale of the underlying futures contracts. For example, if a fund anticipates a rise in interest rates and a decline in the market value of the debt securities in its portfolio, it might purchase put options or write call options on futures contracts instead of selling futures contracts.

If a Fund purchases an option on a futures contract, it may obtain benefits similar to those that would result if it held the futures position itself. But in contrast to a futures transaction, the purchase of an option involves the payment of a premium in addition to transaction costs. In the event of an adverse market movement, however, the Fund is not subject to a risk of loss on the option transaction beyond the price of the premium it paid plus its transaction costs.

When a Fund writes an option on a futures contract, the premium paid by the purchaser is deposited with the Fund's custodian. The Fund must maintain with its futures commission merchant all or a portion of the initial margin requirement on the underlying futures contract. It assumes a risk of adverse movement in the price of the underlying futures contract comparable to that involved in holding a futures position. Subsequent payments to and from the futures commission merchant, similar to variation margin payments, are made as the premium and the initial margin requirements are marked to market daily. The premium may partially offset an unfavorable change in the value of portfolio securities, if the option is not exercised, or it may reduce the amount of any loss incurred by the Fund if the option is exercised.

Risks Associated with Futures Transactions. There are many risks associated with transactions in futures contracts and related options. The value of the assets that are the subject of the futures contract may not move in the anticipated direction. A Fund's successful use of futures contracts is subject to the ability of those managing the Fund's investments to predict correctly the factors affecting the market values of the Fund's portfolio securities. For example, if the Fund is hedged against the possibility of an increase in interest rates which would adversely affect debt securities held by the Fund and the prices of those debt securities instead increases, the Fund loses part or all of the benefit of the increased value of its securities it hedged because it has offsetting losses in its futures positions. Other risks include imperfect correlation between price movements in the financial instrument or securities index underlying the futures contract, on the one hand, and the price movements of either the futures contract itself or the securities held by the Fund, on the other hand. If the prices do not move in the same direction or to the same extent, the transaction may result in trading losses.

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Prior to exercise or expiration, a position in futures may be terminated only by entering into a closing purchase or sale transaction. This requires a secondary market on the relevant contract market. A Fund enters into a futures contract or related option only if there appears to be a liquid secondary market. There can be no assurance, however, that such a liquid secondary market exists for any particular futures contract or related option at any specific time. Thus, it may not be possible to close out a futures position once it has been established. Under such circumstances, the Fund continues to be required to make daily cash payments of variation margin in the event of adverse price movements. In such situations, if the Fund has insufficient cash, it may be required to sell portfolio securities to meet daily variation margin requirements at a time when it may be disadvantageous to do so. In addition, the Fund may be required to perform under the terms of the futures contracts it holds. The inability to close out futures positions also could have an adverse impact on the Fund's ability effectively to hedge its portfolio.

Most United States futures exchanges limit the amount of fluctuation permitted in futures contract prices during a single trading day. This daily limit establishes the maximum amount that the price of a futures contract may vary either up or down from the previous day's settlement price at the end of a trading session. Once the daily limit has been reached in a particular type of contract, no more trades may be made on that day at a price beyond that limit. The daily limit governs only price movements during a particular trading day and therefore does not limit potential losses because the limit may prevent the liquidation of unfavorable positions. Futures contract prices have occasionally moved to the daily limit for several consecutive trading days with little or no trading, thereby preventing prompt liquidation of futures positions and subjecting some futures traders to substantial losses.

Swap Agreements and Options on Swap Agreements

Each Fund may engage in swap transactions, including, but not limited to, swap agreements on interest rates, security or commodity indexes, specific securities and commodities, and credit and event-linked swaps, to the extent permitted by its investment restrictions. To the extent a Fund may invest in foreign currency-denominated securities, it may also invest in currency swap agreements and currency exchange rate swap agreements. Each Fund may also enter into options on swap agreements (“swap options”).

Each Fund may enter into swap transactions for any legal purpose consistent with its investment objectives and policies, such as for the purpose of attempting to obtain or preserve a particular return or spread at a lower cost than obtaining a return or spread through purchases and/or sales of instruments in other markets; to protect against currency fluctuations; as a duration management technique; to protect against any increase in the price of securities the Fund anticipates purchasing at a later date; to gain exposure to one or more securities, currencies, or interest rates; to take advantage of perceived mispricing in the securities markets; or to gain exposure to certain markets in the most economical way possible.

Swap agreements are two party contracts entered into primarily by institutional investors for periods ranging from a few weeks to more than one year. In a standard "swap" transaction, two parties agree to exchange the returns (or differentials in rates of return) earned or realized on particular predetermined investments or instruments, which may be adjusted for an interest factor. The gross returns to be exchanged or "swapped" between the parties are generally calculated with respect to a "notional amount," i.e., the return on or increase in value of a particular dollar amount invested at a particular interest rate, in a particular foreign currency, or in a "basket" of securities or commodities representing a particular index.

• Interest Rate Swaps. Interest rate swaps involve the exchange by a Fund with another party of their respective commitments to pay or receive interest (for example, an exchange of floating rate payments for fixed rate payments with respect to a notional amount of principal).Forms of swap agreements also include interest rate caps, under which, in return for a premium, one party agrees to make payments to the other to the extent that interest rates exceed a specified rate, or "cap"; interest rate floors, under which, in return for a premium, one party agrees to make payments to the other to the extent that interest rates fall below a specified rate, or "floor"; and interest rate collars, under which a party sells a cap and purchases a floor or vice versa in an attempt to protect itself against interest rate movements exceeding given minimum or maximum levels.

• Currency Swaps. A currency swap is an agreement to exchange cash flows on a notional amount based on changes in the relative values of the specified currencies.

• Index Swaps. An index swap is an agreement to make or receive payments based on the different returns that would be achieved if a notional amount were invested in a specified basket of securities (such as the S&P 500 Index) or in some other investment (such as U.S. Treasury Securities).

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• Total Return Swaps. A total return swap is an agreement to make payments of the total return from a specified asset or instrument (or a basket of such instruments) during the specified period, in return for payments equal to a fixed or floating rate of interest or the total return from another specified asset or instrument. Alternatively, a total return swap can be structured so that one party will make payments to the other party if the value of the relevant asset or instrument increases, but receive payments from the other party if the value of that asset or instrument decreases.

• Commodity Swap Agreements. Consistent with a Fund's investment objectives and general investment policies, certain of the Funds may invest in commodity swap agreements. For example, an investment in a commodity swap agreement may involve the exchange of floating-rate interest payments for the total return on a commodity index. In a total return commodity swap, a Fund will receive the price appreciation of a commodity index, a portion of the index, or a single commodity in exchange for paying an agreed-upon fee. If the commodity swap is for one period, the Fund may pay a fixed fee, established at the outset of the swap. However, if the term of the commodity swap is for more than one period, with interim swap payments, the Fund may pay an adjustable or floating fee. With a "floating" rate, the fee may be pegged to a base rate, such as the London Interbank Offered Rate, and is adjusted each period. Therefore, if interest rates increase over the term of the swap contract, the Fund may be required to pay a higher fee at each swap reset date.

• Credit Default Swap Agreements. The "buyer" in a credit default contract is obligated to pay the "seller" a periodic stream of payments over the term of the contract provided that no event of default on an underlying reference obligation has occurred. If an event of default occurs, the seller must pay the buyer the full notional value, or "par value," of the reference obligation in exchange for the reference obligation. A Fund may be either the buyer or seller in a credit default swap transaction. If the Fund is a buyer and no event of default occurs, the Fund will lose its investment and recover nothing. However, if an event of default occurs, the Fund (if the buyer) will receive the full notional value of the reference obligation that may have little or no value. As a seller, the Fund receives a fixed rate of income throughout the term of the contract, which typically is between six months and five years, provided that there is no default event. If an event of default occurs, the seller must pay the buyer the full notional value of the reference obligation. In addition, collateral posting requirements are individually negotiated and there is no regulatory requirement that a counterparty post collateral to secure its obligations or a specified amount of cash, depending upon the terms of the swap, under a credit default swap. Furthermore, there is no requirement that a party be informed in advance when a credit default swap agreement is sold. Accordingly, the Fund may have difficulty identifying the party responsible for payment of its claims. The notional value of credit default swaps with respect to a particular investment is often larger than the total par value of such investment outstanding and, in event of a default, there may be difficulties in making the required deliveries of the reference investments, possibly delaying payments.

Each Fund may invest in derivative instruments that provide exposure to one or more credit default swaps. For example, a Fund may invest in a derivative instrument known as the Loan-Only Credit Default Swap Index (“LCDX”), a tradable index with 100 equally-weighted underlying single-name loan-only credit default swaps (“LCDS”). Each underlying LCDS references an issuer whose loans trade in the secondary leveraged loan market. A Fund can either buy the index (take on credit exposure) or sell the index (pass credit exposure to a counterparty). While investing in these types of derivatives will increase the universe of debt securities to which the Fund is exposed, such investments entail additional risks that are not typically associated with investments in other debt securities. Credit default swaps and other derivative instruments related to loans are subject to the risks associated with loans generally, as well as the risks of derivative transactions.

• Investment Pools. Each Fund may invest in publicly or privately issued interests in investment pools whose underlying assets are credit default, credit-linked, interest rate, currency exchange, equity-linked or other types of swap contracts and related underlying securities or securities loan agreements. The pools’ investment results may be designed to correspond generally to the performance of a specified securities index or “basket” of securities, or sometimes a single security. These types of pools are often used to gain exposure to multiple securities with a smaller investment than would be required to invest directly in the individual securities. They also may be used to gain exposure to foreign securities markets without investing in the foreign securities themselves and/or the relevant foreign market. To the extent that a Fund invests in pools of swaps and related underlying securities or securities loan agreements whose return corresponds to the performance of a foreign securities index or one or more foreign securities, investing in such pools will involve risks similar to the risks of investing in foreign securities. In addition to the risks associated with investing in swaps generally, a Fund bears the risks and costs generally associated with investing in pooled investment vehicles, such as paying the fees and expenses of the pool and the risk that the pool or the operator of the pool may default on its obligations to the holder of interests in the pool, such as a Fund. Interests in privately offered investment pools of swaps may be considered illiquid.

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• Contracts for Differences. “Contracts for differences” are swap arrangements in which a Fund may agree with a counterparty that its return (or loss) will be based on the relative performance of two different groups or “baskets” of securities. For example, as to one of the baskets, a Fund’s return is based on theoretical long futures positions in the securities comprising that basket, and as to the other basket, the Fund’s return is based on theoretical short futures positions in the securities comprising that other basket. The notional sizes of the baskets will not necessarily be the same, which can give rise to investment leverage. Each Fund may also use actual long and short futures positions to achieve the market exposure(s) as contracts for differences. Each Fund may enter into swaps and contracts for differences for investment return, hedging, risk management and for investment leverage.

• Swaptions. A swap option (also known as “swaptions”) is a contract that gives a counterparty the right (but not the obligation) in return for payment of a premium, to enter into a new swap agreement or to shorten, extend, cancel, or otherwise modify an existing swap agreement, at some designated future time on specified terms. The buyer and seller of the swap option agree on the strike price, length of the option period, the term of the swap, notional amount, amortization and frequency of settlement. Each Fund may engage in swap options for hedging purposes or in an attempt to manage and mitigate credit and interest rate risk. Each Fund may write (sell) and purchase put and call swap options. The use of swap options involves risks, including, among others, imperfect correlation between movements of the price of the swap options and the price of the securities, indices or other assets serving as reference instruments for the swap option, reducing the effectiveness of the instrument for hedging or investment purposes.

Obligations under Swap Agreements. The swap agreements a Fund enters into settle in cash and, therefore, provide for calculation of the obligations of the parties to the agreement on a “net basis.” Consequently, a Fund's current obligations (or rights) under such a swap agreement will generally be equal only to the net amount to be paid or received under the agreement based on the relative values of the positions held by each party to the agreement (the “net amount”). A Fund's current obligations under such a swap agreement will be accrued daily (offset against any amounts owed to the Fund) and any accrued but unpaid net amounts owed to a swap counterparty will be covered by the segregation of assets determined to be liquid by those managing the Fund's investments in accordance with procedures established by the Board, to avoid any potential leveraging of the Fund's portfolio. In cases where a Fund is a seller of a credit default swap contract, the Fund will segregate liquid assets equal to the notional amount of the contract. Obligations under swap agreements for which a Fund segregates assets will not be construed to be “senior securities” for purposes of a Fund's investment restriction concerning senior securities.

Risks Associated with Swap Agreements. Swaps can be highly volatile and may have a considerable impact on a Fund’s performance, as the potential gain or loss on any swap transaction is not subject to any fixed limit.Whether a Fund's use of swap agreements or swap options will be successful in furthering its investment objective of total return will depend on the ability of those managing the Fund's investments to predict correctly whether certain types of investments are likely to produce greater returns than other investments. Because they are two party contracts and because they may have terms of greater than seven days, swap agreements may be considered to be illiquid. Moreover, a Fund bears the risk of loss of the amount expected to be received under a swap agreement in the event of the default or bankruptcy of a swap agreement counterparty. The Funds will enter into swap agreements only with counterparties that present minimal credit risks, as determined by those managing the Fund's investments. Certain restrictions imposed on each Fund by the Internal Revenue Code may limit a Fund’s ability to use swap agreements.

Depending on the terms of the particular option agreement, a Fund will generally incur a greater degree of risk when it writes a swap option than it will incur when it purchases a swap option. When a Fund purchases a swap option, it risks losing only the amount of the premium it has paid should it decide to let the option expire unexercised. However, when the Fund writes a swap option, upon exercise of the option the Fund will become obligated according to the terms of the underlying agreement.

Liquidity of Swap Agreements. Some swap markets have grown substantially in recent years with a large number of banks and investment banking firms acting both as principals and as agents utilizing standardized swap documentation. As a result, these swap markets have become relatively liquid. The liquidity of swap agreements will be determined by those managing the Fund's investments based on various factors, including:

• the frequency of trades and quotations,

• the number of dealers and prospective purchasers in the marketplace,

• dealer undertakings to make a market,

• the nature of the security (including any demand or tender features), and

• the nature of the marketplace for trades (including the ability to assign or offset a portfolio's rights and obligations relating to the investment).

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Such determination will govern whether a swap will be deemed to be within a Fund's restriction on investments in illiquid securities.

Valuing Swap Agreements. For purposes of applying a Fund’s investment policies and restrictions (as stated in the Prospectuses and this Statement of Additional Information) swap agreements are generally valued by the Fund at market value. In the case of a credit default swap, however, in applying certain of the Fund’s investment policies and restrictions the Fund will value the credit default swap at its notional value or its full exposure value (i.e., the sum of the notional amount for the contract plus the market value), but may value the credit default swap at market value for purposes of applying certain of the Fund’s other investment policies and restrictions. For example, a Fund may value credit default swaps at full exposure value for purposes of the Fund’s credit quality guidelines because such value reflects the Fund’s actual economic exposure during the term of the credit default swap agreement. In this context, both the notional amount and the market value may be positive or negative depending on whether the fund is selling or buying protection through the credit default swap. The manner in which certain securities or other instruments are valued by a Fund for purposes of applying investment policies and restrictions may differ from the manner in which those investments are valued by other types of investors.

Permissible Uses of Futures and Options on Futures Contracts

Each Fund may enter into futures contracts and related options transactions, for hedging purposes and for other appropriate risk management purposes, and to modify the Fund's exposure to various currency, commodity, equity, or fixed-income markets. Each Fund may engage in futures trading in an effort to generate returns. When using futures contracts and options on futures contracts for hedging or risk management purposes, the Fund determines that the price fluctuations in the contracts and options are substantially related to price fluctuations in securities held by the Fund or which it expects to purchase. In pursuing traditional hedging activities, the Fund may sell futures contracts or acquire puts to protect against a decline in the price of securities that the Fund owns. Each Fund may purchase futures contracts or calls on futures contracts to protect the Fund against an increase in the price of securities the Fund intends to purchase before it is in a position to do so. When a Fund purchases a futures contract, or writes a call option on a futures contract, it segregates liquid assets that, when added to the value of assets deposited with the futures commission merchant as margin, are equal to the market value of the contract.

Limitations on the Use of Futures, Options on Futures Contracts, and Swaps

A fund that utilizes futures contracts, options on futures contracts or swaps has claimed an exclusion from the definition of a “commodity pool operator” under the Commodity Exchange Act and is not subject to registration or regulation as a commodity pool operator under the Commodity Exchange Act. The Commodity Futures Trading Commission amended rule 4.5 “Exclusion for certain otherwise regulated persons from the definition of the term “commodity pool operator.” Rule 4.5 provides that an investment company does not meet the definition of “commodity pool operator” if its use of futures contracts, options on futures contracts and swaps is sufficiently limited that the fund can fall within one of two exclusions set out in rule 4.5. Each Fund intends to limit its use of futures contracts, options on futures contracts and swaps to the degree necessary to fall within one of the two exclusions. If a Fund is unable to do so, it may incur expenses that are necessary to comply with the Commodity Exchange Act and rules the Commodity Futures Trading Commission has adopted under it.

Risk of Potential Government Regulation of Derivatives

It is possible that additional government regulation of various types of derivative instruments, including futures, options and swap agreements, may limit or prevent a fund from using such instruments as a part of its investment strategy, and could ultimately prevent a fund from being able to achieve its investment objective. It is difficult to predict the effects future legislation and regulation in this area, but the effects could be substantial and adverse. It is possible that legislative and regulatory activity could limit or restrict the ability of a fund to use certain instruments as a part of its investment strategy. For instance, in December 2015, the SEC proposed new regulations applicable to a mutual fund’s use of derivatives and related instruments.

If adopted as proposed, these regulations could significantly limit or impact a fund's ability to invest in derivatives and related instruments, limit a fund's ability to employ certain strategies that use derivatives and/or adversely affect the fund's performance, efficiency in implementing strategies, and ability to pursue their investment objectives. Limits or restrictions applicable to the counterparties with which the funds engage in derivative transactions could also prevent the funds from using certain instruments.

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Fixed-Income Securities

Inflation-Indexed Bonds

Some Funds may invest in inflation-indexed bonds or inflation protected debt securities, which are fixed income securities whose value is periodically adjusted according to the rate of inflation. Two structures are common. The U.S. Treasury and some other issuers utilize a structure that accrues inflation into the principal value of the bond. Most other issuers pay out the Consumer Price Index accruals as part of a semi-annual coupon. Inflation-indexed securities issued by the U.S. Treasury (Treasury Inflation Protected Securities or TIPS) have maturities of approximately five, ten or thirty years, although it is possible that securities with other maturities will be issued in the future. The U.S. Treasury securities pay interest on a semi-annual basis equal to a fixed percentage of the inflation-adjusted principal amount. If the periodic adjustment rate measuring inflation falls, the principal value of inflation-indexed bonds will be adjusted downward, and consequently the interest payable on these securities (calculated with respect to a smaller principal amount) will be reduced. The value of inflation-indexed bonds is expected to change in response to changes in real interest rates. Real interest rates in turn are tied to the relationship between nominal interest rates and the rate of inflation. Therefore, if the rate of inflation rises at a faster rate than nominal interest rates, real interest rates might decline, leading to an increase in value of inflation-indexed bonds. In contrast, if nominal interest rates increase at a faster rate than inflation, real interest rates might rise, leading to a decrease in value of inflation-indexed bonds. While these securities are expected to be protected from long-term inflationary trends, short-term increases in inflation may lead to a decline in value. If interest rates rise due to reasons other than inflation (for example, due to changes in currency exchange rates), investors in these securities may not be protected to the extent that the increase is not reflected in the bond's inflation measure.

The periodic adjustment of U.S. inflation-indexed bonds is tied to the Consumer Price Index for Urban Consumers (CPI-U), which is calculated monthly by the U.S. Bureau of Labor Statistics. The CPI-U is a measurement of changes in the cost of living, made up of components such as housing, food, transportation and energy. Inflation-indexed bonds issued by a foreign government are generally adjusted to reflect a comparable inflation index calculated by that government. Any increase in the principal amount of an inflation-indexed bond will be considered taxable ordinary income, even though investors do not receive their principal until maturity.

Step-Coupon Securities

Each Fund may invest in step-coupon securities. Step-coupon securities trade at a discount from their face value and pay coupon interest. The coupon rate is low for an initial period and then increases to a higher coupon rate thereafter. Market values of these types of securities generally fluctuate in response to changes in interest rates to a greater degree than conventional interest-paying securities of comparable term and quality. Under many market conditions, investments in such securities may be illiquid, making it difficult for a Fund to dispose of them or determine their current value.

“Stripped” Securities

Each Fund may invest in stripped securities, which are usually structured with two or more classes that receive different proportions of the interest and principal distribution on a pool of U.S. government or foreign government securities or mortgage assets. In some cases, one class will receive all of the interest (the interest-only or “IO” class), while the other class will receive all of the principal (the principal-only or “PO” class). Stripped securities commonly have greater market volatility than other types of fixed-income securities. In the case of stripped mortgage securities, if the underlying mortgage assets experience greater than anticipated payments of principal, a Fund may fail to recoup fully its investments in IOs. Stripped securities may be illiquid. Stripped securities may be considered derivative securities.

Zero-Coupon Securities

Each Fund may invest in zero-coupon securities. Zero-coupon securities have no stated interest rate and pay only the principal portion at a stated date in the future. They usually trade at a substantial discount from their face (par) value. Zero-coupon securities are subject to greater market value fluctuations in response to changing interest rates than debt obligations of comparable maturities that make distributions of interest in cash.

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Foreign Currency Transactions

Options on Foreign Currencies

In addition, each Fund may buy and write options on foreign currencies in a manner similar to that in which futures or forward contracts on foreign currencies will be utilized. Each Fund may use options on foreign currencies to hedge against adverse changes in foreign currency conversion rates. For example, a decline in the U.S. dollar value of a foreign currency in which portfolio securities are denominated will reduce the U.S. dollar value of such securities, even if their value in the foreign currency remains constant. In order to protect against such diminutions in the value of the portfolio securities, a Fund may buy put options on the foreign currency. If the value of the currency declines, the Fund will have the right to sell such currency for a fixed amount in U.S. dollars, thereby offsetting, in whole or in part, the adverse effect on its portfolio. Conversely, when a rise in the U.S. dollar value of a currency in which securities to be acquired are denominated is projected, thereby increasing the cost of such securities, the Fund may buy call options on the foreign currency. The purchase of such options could offset, at least partially, the effects of the adverse movements in exchange rates. As in the case of other types of options, however, the benefit to the Fund from purchases of foreign currency options will be reduced by the amount of the premium and related transaction costs. In addition, if currency exchange rates do not move in the direction or to the extent desired, the Fund could sustain losses or lesser gains on transactions in foreign currency options that would require the Fund to forgo a portion or all of the benefits of advantageous changes in those rates.

Each Fund also may write options on foreign currencies. For example, to hedge against a potential decline in the U.S. dollar due to adverse fluctuations in exchange rates, a Fund could, instead of purchasing a put option, write a call option on the relevant currency. If the decline expected by the Fund occurs, the option will most likely not be exercised and the diminution in value of portfolio securities will be offset at least in part by the amount of the premium received. Similarly, instead of purchasing a call option to hedge against a potential increase in the U.S. dollar cost of securities to be acquired, a Fund could write a put option on the relevant currency which, if rates move in the manner projected by the Fund, will expire unexercised and allow the Fund to hedge the increased cost up to the amount of the premium. If exchange rates do not move in the expected direction, the option may be exercised and the Fund would be required to buy or sell the underlying currency at a loss, which may not be fully offset by the amount of the premium. Through the writing of options on foreign currencies, a Fund also may lose all or a portion of the benefits that might otherwise have been obtained from favorable movements in exchange rates.

Futures on Currency

A foreign currency future provides for the future sale by one party and purchase by another party of a specified quantity of foreign currency at a specified price and time. A public market exists in futures contracts covering a number of foreign currencies. Currency futures contracts are exchange-traded and change in value to reflect movements of a currency or a basket of currencies. Settlement must be made in a designated currency.

Forward Foreign Currency Exchange Contracts

Each Fund may, but is not obligated to, enter into forward foreign currency exchange contracts. Currency transactions include forward currency contracts and exchange listed or over-the-counter options on currencies. A forward currency contract involves a privately negotiated obligation to purchase or sell a specific currency at a specified future date at a price set at the time of the contract.

The typical use of a forward contract is to "lock in" the price of a security in U.S. dollars or some other foreign currency which a Fund is holding in its portfolio. By entering into a forward contract for the purchase or sale, for a fixed amount of dollars or other currency, of the amount of foreign currency involved in the underlying security transactions, the Fund may be able to protect itself against a possible loss resulting from an adverse change in the relationship between the U.S. dollar or other currency which is being used for the security purchase and the foreign currency in which the security is denominated in or exposed to during the period between the date on which the security is purchased or sold and the date on which payment is made or received.

Those managing the Fund's investments also may from time to time utilize forward contracts for other purposes. For example, they may be used to hedge a foreign security held in the portfolio or a security which pays out principal tied to an exchange rate between the U.S. dollar and a foreign currency, against a decline in value of the applicable foreign currency. They also may be used to lock in the current exchange rate of the currency in which those securities anticipated to be purchased are denominated in or exposed to. At times, each Fund may enter into "cross-currency" hedging transactions involving currencies other than those in which securities are held or proposed to be purchased are denominated.

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Each Fund segregates liquid assets in an amount equal to (1) at least its daily marked-to-market (net) obligation (i.e., its daily net liability, if any) with respect to forward currency contracts that are cash settled and (2) the net notional value with respect to forward currency contracts that are not cash settled. It should be noted that the use of forward foreign currency exchange contracts does not eliminate fluctuations in the underlying prices of the securities. It simply establishes a rate of exchange between the currencies that can be achieved at some future point in time. Additionally, although such contracts tend to minimize the risk of loss due to a decline in the value of the hedged currency, they also tend to limit any potential gain that might result if the value of the currency increases.

Foreign Securities

Investing in foreign securities carries political and economic risks distinct from those associated with investing in the United States. Investments in foreign securities also involve the risk of possible adverse changes in investment or exchange control regulations, expropriation or confiscatory taxation, limitation on or delays in the removal of funds or other assets of a fund, political or financial instability or diplomatic and other developments that could affect such investments. Foreign investments may be affected by actions of foreign governments adverse to the interests of U.S. investors, including the possibility of expropriation or nationalization of assets, confiscatory taxation, restrictions on U.S. investment or on the ability to repatriate assets or to convert currency into U.S. Dollars. There may be a greater possibility of default by foreign governments or foreign-government sponsored enterprises. Investments in foreign countries also involve a risk of local political, economic or social instability, military action or unrest or adverse diplomatic developments.

Asia-Pacific Countries

In addition to the risks of foreign investing and the risks of investing in emerging markets, the developing market Asia-Pacific countries in which a Fund may invest are subject to certain additional or specific risks. In the Asia-Pacific markets, there is a high concentration of market capitalization and trading volume in a small number of issuers representing a limited number of industries, as well as a high concentration of investors and financial intermediaries. Many of these markets also may be affected by developments with respect to more established markets in the region, such as Japan and Hong Kong. Brokers in developing market Asia-Pacific countries typically are fewer in number and less well capitalized than brokers in the United States.

Many of the developing market Asia-Pacific countries may be subject to a greater degree of economic, political and social instability than is the case in the United States and Western European countries. Such instability may result from, among other things: (i) authoritarian governments or military involvement in political and economic decision- making, including changes in government through extra-constitutional means; (ii) popular unrest associated with demands for improved political, economic and social conditions; (iii) internal insurgencies; (iv) hostile relations with neighboring countries; and/or (v) ethnic, religious and racial disaffection. In addition, the governments of many of such countries, such as Indonesia, have a heavy role in regulating and supervising the economy.

An additional risk common to most such countries is that the economy is heavily export-oriented and, accordingly, is dependent upon international trade. The existence of overburdened infrastructure and obsolete financial systems also present risks in certain countries, as do environmental problems. Certain economies also depend to a significant degree upon exports of primary commodities and, therefore, are vulnerable to changes in commodity prices that, in turn, may be affected by a variety of factors. The legal systems in certain developing market Asia-Pacific countries also may have an adverse impact on a Fund. The rights of investors in developing market Asia-Pacific companies may be more limited than those of shareholders of U.S. corporations. It may be difficult or impossible to obtain and/or enforce a judgment in a developing market Asia-Pacific country.

China

Investing in China involves special considerations, including: the risk of nationalization or expropriation of assets or confiscatory taxation; greater governmental involvement in and control over the economy, interest rates and currency exchange rates; controls on foreign investment and limitations on repatriation of invested capital; greater social, economic and political uncertainty; dependency on exports and the corresponding importance of international trade; and currency exchange rate fluctuations. The government of China maintains strict currency controls in support of economic, trade and political objectives and regularly intervenes in the currency market. The government's actions in this respect may not be transparent or predictable. Furthermore, it is difficult for foreign investors to directly access money market securities in China because of investment and trading restrictions. These and other factors may decrease the value and liquidity of a fund's investments.

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Investments in Stock Connect and Bond Connect

Funds may invest in China A shares, which are shares of certain Chinese companies listed and traded through the Shanghai-Hong Kong Stock Connect and Shenzhen-Hong Kong Stock Connect programs (“Stock Connect”). Stock Connect is a securities trading and clearing program established by Hong Kong Exchanges and Clearing Limited, the Shanghai Stock Exchange ("SSE"), the Shenzhen Stock Exchange ("SZSE") and China Securities Depository and Clearing Corporation Limited, which seeks to provide mutual stock market access between Mainland China and Hong Kong. Trading through Stock Connect is subject to numerous restrictions and risks that could impair the Fund’s ability to invest in or sell China A shares and adversely affect the Fund’s performance, such as the following:

• China A shares generally may not be sold, purchased or otherwise transferred other than through Stock Connect in accordance with applicable rules, regulations, and restrictions. Such securities may lose their eligibility, in which case they presumably could be sold but could no longer be purchased through Stock Connect. Market volatility and settlement difficulties in the China A share markets may result in significant fluctuations in the prices and liquidity of the securities traded on such markets. Further regulations or restrictions, such as limitations on redemptions or suspension of trading, may adversely impact the Fund.

• Stock Connect is generally only available on business days when both the China and Hong Kong markets are open and when banking services are available in both markets on the corresponding settlement days. As a result, a Fund may not be able trade when it would be otherwise attractive to do so, and the Fund may not be able to dispose of its China A shares in a timely manner.

• Investing in China A shares is subject to Stock Connect’s clearance and settlement procedures, which could pose risks to the Fund. Certain requirements must be completed before the market opening, or a Fund cannot sell the shares on that trading day. Stock Connect also imposes quotas that limit aggregate net purchases on an exchange on a particular day, and an investor cannot purchase and sell the same security through Stock Connect on the same trading day. Once the daily quota is reached, orders to purchase additional China A shares through Stock Connect will be rejected. Such restrictions could limit a Fund’s ability to sell its China A shares in a timely manner, or to sell them at all.

• If a Fund holds 5% or more of a China A share issuer’s total shares through Stock Connect investments, the Fund must return any profits obtained from the purchase and sale of those shares if both transactions occur within a six-month period. All accounts managed by the Funds’ Advisor and/or its affiliates will be aggregated for purposes of this 5% limitation, which makes it more likely that a Fund’s profits may be subject to these limitations.

• Stock Connect uses an omnibus clearing structure, and the Fund’s shares will be registered in its custodian’s name on the Central Clearing and Settlement System. This may limit the ability of the Fund’s advisor to effectively manage a Fund, and may expose the Fund to the credit risk of its custodian or to greater risk of expropriation. Investment in China A shares through Stock Connect may be available only through a single broker that is an affiliate of the Fund’s custodian, which may affect the quality of execution provided by such broker. 

• China A shares purchased through Stock Connect will be held via a book entry omnibus account in the name of Hong Kong Securities Clearing Company Limited (“HKSCC”), Hong Kong’s clearing entity, and not the Fund’s name as the beneficial owner. Therefore, a Fund’s ability to exercise its rights as a shareholder and to pursue claims against the issuer of China A shares may be limited. While Chinese regulations and the Hong Kong Stock Exchange have issued clarifications and guidance supporting the concept of beneficial ownership through Stock Connect, the interpretation of beneficial ownership in China by regulators and courts may continue to evolve. 

• The Fund’s investments in China A shares through Stock Connect are generally subject to Chinese securities regulations and listing rules, among other restrictions. The Fund will not benefit from access to Hong Kong investor compensation funds, which are set up to protect against defaults of trades, when investing through Stock Connect. Investments in China A shares may not be covered by the securities investor protection programs of the exchanges and, without the protection of such programs, will be subject to the risk of default by the broker. If the depository of the SSE and the SZSE defaulted, a Fund may not be able to recover fully its losses from the depository or may be delayed in receiving proceeds as part of any recovery process.

• Fees, costs and taxes imposed on foreign investors (such as the Fund) may be higher than comparable fees, costs and taxes imposed on owners of other securities that provide similar investment exposure. Trades using Stock Connect may also be subject to various fees, taxes and market charges imposed by Chinese market participants and regulatory authorities. Uncertainties in China’s tax rules related to the taxation of income and gains from investments in China A shares could result in unexpected tax liabilities for the Fund, and the withholding tax treatment of dividends and capital gains payable to overseas investors currently is unsettled. 

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• Because trades of eligible China A shares on Stock Connect must be settled in Renminbi (RMB), the Chinese currency, Funds investing through Stock Connect will be exposed to RMB currency risks. The ability to hedge RMB currency risks may be limited. The RMB is subject to exchange control restrictions, and the Fund could be adversely affected by delays in converting currencies into RMB and vice versa.

• Because Stock Connect is in its early stages, the effect on the market for trading China A shares with the introduction of numerous foreign investors is currently unknown. Stock Connect is relatively new and may be subject to further interpretation and guidance. There can be no assurance as to Stock Connect’s continued existence or whether future developments regarding the program may restrict or adversely affect the Fund’s investments or returns.

• The risks associated with investing through Stock Connect could lead to greater market execution risk, valuation risks, liquidity risks and costs for a Fund, as well as for Authorized Participants that create and redeem Creation Units. This could cause a Fund to trade in the market at greater bid-ask spreads or greater premiums or discounts to the Fund’s NAV. Because the China A share market is considered volatile and unstable (with the risk of widespread trading suspensions or government intervention), the creation and redemption of Creation Units may also be disrupted.

Funds may also invest in China Interbank bonds traded on the China Interbank Bond Market (“CIBM”) through the China - Hong Kong Bond Connect program (“Bond Connect”). In China, the Hong Kong Monetary Authority Central Money Markets Unit holds Bond Connect securities on behalf of investors (such as the Fund) in accounts maintained with maintained with a China-based custodian (either the China Central Depository & Clearing Co. or the Shanghai Clearing House). Investments using Bond Connect are subject to risks similar to those described above with respect to Stock Connect.

Europe

The economies and markets of European countries are often closely connected and interdependent, and events in one European country can have an adverse impact on other European countries. Certain funds may invest in securities of issuers that are domiciled in, or have significant operations in, member countries of the Economic and Monetary Union of the European Union (the “EU”), which requires member countries to comply with restrictions on inflation rates, deficits, interest rates, debt levels and fiscal and monetary controls. Decreasing imports or exports, changes in governmental or EU regulations on trade, changes in the exchange rate of the euro (the common currency of certain EU countries), the default or threat of default by an EU member country on its sovereign debt, and/or an economic recession in an EU member country may have a significant adverse effect on the economies of EU member countries and their trading partners, including some or all of the emerging markets countries. Although certain European countries do not use the euro, many of these countries are obliged to meet the criteria for joining the euro zone. Consequently, these countries must comply with many of the restrictions noted above. The European financial markets have experienced volatility and adverse trends in recent years due to concerns about economic downturns, rising government debt levels and the possible default of government debt in several European countries. Further defaults or restructurings by governments and other entities of their debt could have additional adverse effects on economies, financial markets and asset valuations around the world. In addition, one or more countries may abandon the euro and/or withdraw from the EU, including, with respect to the latter, the United Kingdom (the "UK"), which is a significant market in the global economy. The impact of these actions, especially if they occur in a disorderly fashion, is not clear but could be significant and far-reaching and could adversely impact the value of investments in the region.

The UK’s referendum vote to leave the EU (referred to as "Brexit") could cause business disruptions and uncertainty and thus adversely impact the financial results and operations of various European companies and economies.

Although the precise time frame for Brexit is uncertain, it is currently expected that the UK will seek to withdraw from the EU with an anticipated completion date within two years after notifying the European Council of the UK’s intention to withdraw. The effects of Brexit will largely depend on any agreements the UK makes to retain access to EU markets either during a transitional period or more permanently. Brexit could lead to legal and tax uncertainty and potentially divergent national laws and regulations as the UK determines which EU laws to replace or replicate. Additionally, Brexit could lead to global economic uncertainty and result in significant volatility in the global stock markets and currency exchange rate fluctuations.

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Japan

Japanese investments may be significantly affected by events influencing Japan’s economy and the exchange rate between the Japanese yen and the U.S. Dollar. Japan’s economy fell into a long recession in the 1990s. After a few years of mild recovery in the mid-2000s, Japan’s economy fell into another recession as a result of the recent global economic crisis. Japan is heavily dependent on exports and foreign oil. Japan is located in a seismically active area, and in 2011 experienced an earthquake of a sizable magnitude and a tsunami that significantly affected important elements of its infrastructure and resulted in a nuclear crisis. Since these events, Japan’s financial markets have fluctuated dramatically. The full extent of the impact of these events on Japan’s economy and on foreign investment in Japan is difficult to estimate. Japan’s economic prospects may be affected by the political and military situations of its near neighbors, notably North and South Korea, China, and Russia.

Latin America

Most Latin American countries have experienced, at one time or another, severe and persistent levels of inflation, including, in some cases, hyperinflation. This has, in turn, led to high interest rates, extreme measures by governments to keep inflation in check, and a generally debilitating effect on economic growth. Although inflation in many countries has lessened, there is no guarantee it will remain at lower levels. In addition, the political history of certain Latin American countries has been characterized by political uncertainty, intervention by the military in civilian and economic spheres, and political corruption. Such developments, if they were to reoccur, could reverse favorable trends toward market and economic reform, privatization, and removal of trade barriers, and result in significant disruption in securities markets. Certain Latin American countries may also have managed currencies which are maintained at artificial levels to the U.S. Dollar rather than at levels determined by the market. This type of system can lead to sudden and large adjustments in the currency which, in turn, can have a disruptive and negative effect on foreign investors. There is no significant foreign exchange market for many currencies and it would, as a result, be difficult for the Fund to engage in foreign currency transactions designed to protect the value of the Fund’s interests in securities denominated in such currencies. Finally, a number of Latin American countries are among the largest debtors of developing countries. There have been moratoria on, and reschedulings of, repayment with respect to these debts. Such events can restrict the flexibility of these debtor nations in the international markets and result in the imposition of onerous conditions on their economies.

High Yield Securities

Each Fund may invest a portion of its assets in bonds that are rated below investment grade (sometimes called “high yield bonds” or "junk bonds") which are rated at the time of purchase Ba1 or lower by Moody's and BB+ or lower by S&P Global (if the bond has been rated by only one of those agencies, that rating will determine whether the bond is below investment grade; if the bond has not been rated by either of those agencies, those managing the Fund's investments will determine whether the bond is of a quality comparable to those rated below investment grade). Lower rated bonds involve a higher degree of credit risk, which is the risk that the issuer will not make interest or principal payments when due. In the event of an unanticipated default, a Fund would experience a reduction in its income and could expect a decline in the market value of the bonds so affected. Issuers of high yield securities may be involved in restructurings or bankruptcy proceedings that may not be successful. If an issuer defaults, it may not be able to pay all or a portion of interest and principal owed to the fund, it may exchange the high yield securities owned by the fund for other securities, including equities, and/or the fund may incur additional expenses while seeking recovery of its investment. Some funds may also invest in unrated bonds of foreign and domestic issuers. Unrated bonds, while not necessarily of lower quality than rated bonds, may not have as broad a market. Because of the size and perceived demand of the issue, among other factors, certain municipalities may not incur the expense of obtaining a rating. Those managing the Fund's investments will analyze the creditworthiness of the issuer, as well as any financial institution or other party responsible for payments on the bond, in determining whether to purchase unrated bonds. Unrated bonds will be included in the limitation a Fund has with regard to high yield bonds unless those managing the Fund's investments deem such securities to be the equivalent of investment grade bonds. Some of the high yield securities consist of Rule 144A securities. High yield securities may contain any type of interest rate payment or reset terms, including fixed rate, adjustable rate, zero coupon, contingent, deferred, payment-in-kind and those with auction rate features.

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Initial Public Offerings ("IPOs")

An IPO is a company's first offering of stock to the public. IPO risk is that the market value of IPO shares will fluctuate considerably due to factors such as the absence of a prior public market, unseasoned trading, the small number of shares available for trading, and limited information about the issuer. The purchase of IPO shares may involve high transaction costs. IPO shares are subject to market risk and liquidity risk. In addition, the market for IPO shares can be speculative and/or inactive for extended periods. The limited number of shares available for trading in some IPOs may make it more difficult for a fund to buy or sell significant amounts of shares without an unfavorable impact on prevailing prices. Investors in IPO shares can be affected by substantial dilution in the value of their shares by sales of additional shares and by concentration of control in existing management and principal shareholders. When a fund's asset base is small, a significant portion of the fund's performance could be attributable to investments in IPOs because such investments would have a magnified impact on the fund. As the fund's assets grow, the effect of the fund's investments in IPOs on the fund's performance probably will decline, which could reduce the fund's performance. Because of the price volatility of IPO shares, a fund may choose to hold IPO shares for a very short period. This may increase the turnover of the fund's portfolio and lead to increased expenses to the fund, such as commissions and transaction costs. By selling IPO shares, the fund may realize taxable gains it will subsequently distribute to shareholders.

Inverse Floating Rate and Other Variable and Floating Rate Instruments

Each Fund may purchase variable and floating rate instruments. These instruments may include variable amount master demand notes that permit the indebtedness thereunder to vary in addition to providing for periodic adjustments in the interest rate. These instruments may also include leveraged inverse floating rate debt instruments, or “inverse floaters”. The interest rate of an inverse floater resets in the opposite direction from the market rate of interest on a security or interest to which it is related. An inverse floater may be considered to be leveraged to the extent that its interest rate varies by a magnitude that exceeds the magnitude of the change in the index rate of interest, and is subject to many of the same risks as derivatives. The higher degree of leverage inherent in inverse floaters is associated with greater volatility in their market values. Certain of these investments may be illiquid. The absence of an active secondary market with respect to these investments could make it difficult for a Fund to dispose of a variable or floating rate note if the issuer defaulted on its payment obligation or during periods that the Fund is not entitled to exercise its demand rights, and the Fund could, for these or other reasons, suffer a loss with respect to such instruments.

Master Limited Partnerships (“MLPs”)

An MLP is an entity that is generally taxed as a partnership for federal income tax purposes and that derives each year at least 90% of its gross income from "Qualifying Income". Qualifying Income includes interest, dividends, real estate rents, gain from the sale or disposition of real property, income and gain from commodities or commodity futures, and income and gain from mineral or natural resources activities that generate Qualifying Income. MLP interests (known as units) are traded on securities exchanges or over-the-counter. An MLP's organization as a partnership and compliance with the Qualifying Income rules generally eliminates federal tax at the entity level.

An MLP has one or more general partners (who may be individuals, corporations, or other partnerships) which manage the partnership, and limited partners, which provide capital to the partnership but have no role in its management. Typically, the general partner is owned by company management or another publicly traded sponsoring corporation. When an investor buys units in an MLP, the investor becomes a limited partner. Holders of MLP units have limited control and voting rights on matters affecting the partnership and are exposed to a remote possibility of liability for all of the obligations of that MLP in the event that a court determines that the rights of the holders of MLP units to vote to remove or replace the general partner of that MLP, to approve amendments to that MLP’s partnership agreement, or to take other action under the partnership agreement of that MLP would constitute “control” of the business of that MLP, or a court or governmental agency determines that the MLP is conducting business in a state without complying with the partnership statute of that state. Holders of MLP units are also exposed to the risk that they will be required to repay amounts to the MLP that are wrongfully distributed to them.

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The business of certain MLPs is affected by supply and demand for energy commodities because such MLPs derive revenue and income based upon the volume of the underlying commodity produced, transported, processed, distributed, and/ or marketed. Pipeline MLPs have indirect commodity exposure to oil and gas price volatility because, although they do not own the underlying energy commodity, the general level of commodity prices may affect the volume of the commodity the MLP delivers to its customers and the cost of providing services such as distributing natural gas liquids. The costs of natural gas pipeline MLPs to perform services may exceed the negotiated rates under “negotiated rate” contracts. Processing MLPs may be directly affected by energy commodity prices. Propane MLPs own the underlying energy commodity, and therefore have direct exposure to energy commodity prices. The MLP industry in general could be hurt by market perception that MLP's performance and valuation are directly tied to commodity prices.

Pipeline MLPs are common carrier transporters of natural gas, natural gas liquids (primarily propane, ethane, butane and natural gasoline), crude oil or refined petroleum products (gasoline, diesel fuel and jet fuel). Pipeline MLPs also may operate ancillary businesses such as storage and marketing of such products. Pipeline MLPs derive revenue from capacity and transportation fees. Historically, pipeline output has been less exposed to cyclical economic forces due to its low cost structure and government-regulated nature. In addition, most pipeline MLPs have limited direct commodity price exposure because they do not own the product being shipped.

Processing MLPs are gatherers and processors of natural gas as well as providers of transportation, fractionation and storage of natural gas liquids ("NGLs"). Processing MLPs derive revenue from providing services to natural gas producers, which require treatment or processing before their natural gas commodity can be marketed to utilities and other end user markets. Revenue for the processor is fee based, although it is not uncommon to have some participation in the prices of the natural gas and NGL commodities for a portion of revenue.

Propane MLPs are distributors of propane to homeowners for space and water heating. Propane MLPs derive revenue from the resale of the commodity on a margin over wholesale cost. The ability to maintain margin is a key to profitability. Propane serves approximately 3% of the household energy needs in the United States, largely for homes beyond the geographic reach of natural gas distribution pipelines. Approximately 70% of annual cash flow is earned during the winter heating season (October through March). Accordingly, volumes are weather dependent, but have utility type functions similar to electricity and natural gas.

MLPs operating interstate pipelines and storage facilities are subject to substantial regulation by the Federal Energy Regulatory Commission ("FERC"), which regulates interstate transportation rates, services and other matters regarding natural gas pipelines including: the establishment of rates for service; regulation of pipeline storage and liquified natural gas facility construction; issuing certificates of need for companies intending to provide energy services or constructing and operating interstate pipeline and storage facilities; and certain other matters. FERC also regulates the interstate transportation of crude oil, including: regulation of rates and practices of oil pipeline companies; establishing equal service conditions to provide shippers with equal access to pipeline transportation; and establishment of reasonable rates for transporting petroleum and petroleum products by pipeline.

MLPs are subject to various federal, state and local environmental laws and health and safety laws as well as laws and regulations specific to their particular activities. These laws and regulations address: health and safety standards for the operation of facilities, transportation systems and the handling of materials; air and water pollution requirements and standards; solid waste disposal requirements; land reclamation requirements; and requirements relating to the handling and disposition of hazardous materials. MLPs are subject to the costs of compliance with such laws applicable to them, and changes in such laws and regulations may adversely affect their results of operations.

MLPs may be subject to liability relating to the release of substances into the environment, including liability under federal “Superfund” and similar state laws for investigation and remediation of releases and threatened releases of hazardous materials, as well as liability for injury and property damage for accidental events, such as explosions or discharges of materials causing personal injury and damage to property. Such potential liabilities could have a material adverse effect upon the financial condition and results of operations of MLPs.

MLPs are subject to numerous business related risks, including: deterioration of business fundamentals reducing profitability due to development of alternative energy sources, consumer sentiment with respect to global warming, changing demographics in the markets served, unexpectedly prolonged and precipitous changes in commodity prices and increased competition that reduces the MLP’s market share; the lack of growth of markets requiring growth through acquisitions; disruptions in transportation systems; the dependence of certain MLPs upon the energy exploration and development activities of unrelated third parties; availability of capital for expansion and construction of needed facilities; a significant decrease in natural gas production due to depressed commodity prices or otherwise; the inability of MLPs to successfully integrate recent or future acquisitions; and the general level of the economy.

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Municipal Obligations and AMT-Subject Bonds

Municipal Obligations are obligations issued by or on behalf of states, territories, and possessions of the United States and the District of Columbia and their political subdivisions, agencies and instrumentalities, including municipal utilities, or multi-state agencies or authorities. The interest on Municipal Obligations is exempt from federal income tax in the opinion of bond counsel to the issuer. Three major classifications of Municipal Obligations are: Municipal Bonds, that generally have a maturity at the time of issue of one year or more; Municipal Notes, that generally have a maturity at the time of issue of six months to three years; and Municipal Commercial Paper, that generally has a maturity at the time of issue of 30 to 270 days.

The term "Municipal Obligations" includes debt obligations issued to obtain funds for various public purposes, including the construction of a wide range of public facilities such as airports, bridges, highways, housing, hospitals, mass transportation, schools, streets, water and sewer works, and electric utilities. Other public purposes for which Municipal Obligations are issued include refunding outstanding obligations, obtaining funds for general operating expenses, and lending such funds to other public institutions and facilities. To the extent that a fund invests a significant portion of its assets in municipal obligations issued in connection with a single project, the fund likely will be affected by the economic, business or political environment of the project.

AMT-Subject Bonds are industrial development bonds issued by or on behalf of public authorities to obtain funds to provide for the construction, equipment, repair or improvement of privately operated housing facilities, sports facilities, convention or trade show facilities, airport, mass transit, industrial, port or parking facilities, air or water pollution control facilities, and certain local facilities for water supply, gas, electricity, or sewage or solid waste disposal. They are considered to be Municipal Obligations if the interest paid thereon qualifies as exempt from federal income tax in the opinion of bond counsel to the issuer, even though the interest may be subject to the federal alternative minimum tax.

Municipal Bonds

Municipal Bonds may be either "general obligation" or "revenue" issues. General obligation bonds are secured by the issuer's pledge of its faith, credit, and taxing power for the payment of principal and interest. Revenue bonds are payable from the revenues derived from a particular facility or class of facilities or, in some cases, from the proceeds of a special excise tax or other specific revenue source (e.g., the user of the facilities being financed), but not from the general taxing power. Industrial development bonds and pollution control bonds in most cases are revenue bonds and generally do not carry the pledge of the credit of the issuing municipality. The payment of the principal and interest on industrial revenue bonds depends solely on the ability of the user of the facilities financed by the bonds to meet its financial obligations and the pledge, if any, of real and personal property so financed as security for such payment. Funds may also invest in "moral obligation" bonds that are normally issued by special purpose public authorities. If an issuer of moral obligation bonds is unable to meet its obligations, the repayment of the bonds becomes a moral commitment but not a legal obligation of the state or municipality in question.

Municipal Commercial Paper

Municipal Commercial Paper refers to short-term obligations of municipalities that may be issued at a discount and may be referred to as Short-Term Discount Notes. Municipal Commercial Paper is likely to be used to meet seasonal working capital needs of a municipality or interim construction financing. Generally they are repaid from general revenues of the municipality or refinanced with long-term debt. In most cases Municipal Commercial Paper is backed by letters of credit, lending agreements, note repurchase agreements or other credit facility agreements offered by banks or other institutions.

Municipal Notes

Municipal Notes usually are general obligations of the issuer and are sold in anticipation of a bond sale, collection of taxes, or receipt of other revenues. Payment of these notes is primarily dependent upon the issuer's receipt of the anticipated revenues. Other notes include "Construction Loan Notes" issued to provide construction financing for specific projects, and "Bank Notes" issued by local governmental bodies and agencies to commercial banks as evidence of borrowings. Some notes ("Project Notes") are issued by local agencies under a program administered by the U.S. Department of Housing and Urban Development. Project Notes are secured by the full faith and credit of the United States.

• Bank Notes are notes issued by local governmental bodies and agencies such as those described above to commercial banks as evidence of borrowings. The purposes for which the notes are issued are varied but they are frequently issued to meet short-term working-capital or capital-project needs. These notes may have risks similar to the risks associated with TANs and RANs.

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• Bond Anticipation Notes ("BANs") are usually general obligations of state and local governmental issuers which are sold to obtain interim financing for projects that will eventually be funded through the sale of long-term debt obligations or bonds. The ability of an issuer to meet its obligations on its BANs is primarily dependent on the issuer's access to the long-term municipal bond market and the likelihood that the proceeds of such bond sales will be used to pay the principal and interest on the BANs.

• Construction Loan Notes are issued to provide construction financing for specific projects. Permanent financing, the proceeds of which are applied to the payment of construction loan notes, is sometimes provided by a commitment by the Government National Mortgage Association ("GNMA") to purchase the loan, accompanied by a commitment by the Federal Housing Administration to insure mortgage advances thereunder. In other instances, permanent financing is provided by commitments of banks to purchase the loan.

• Revenue Anticipation Notes ("RANs") are issued by governments or governmental bodies with the expectation that future revenues from a designated source will be used to repay the notes. In general they also constitute general obligations of the issuer. A decline in the receipt of projected revenues, such as anticipated revenues from another level of government, could adversely affect an issuer's ability to meet its obligations on outstanding RANs. In addition, the possibility that the revenues would, when received, be used to meet other obligations could affect the ability of the issuer to pay the principal and interest on RANs.

• Tax Anticipation Notes ("TANs") are issued by state and local governments to finance the current operations of such governments. Repayment is generally to be derived from specific future tax revenues. TANs are usually general obligations of the issuer. A weakness in an issuer's capacity to raise taxes due to, among other things, a decline in its tax base or a rise in delinquencies, could adversely affect the issuer's ability to meet its obligations on outstanding TANs.

Other Municipal Obligations

Other kinds of Municipal Obligations are occasionally available in the marketplace, and the fund may invest in such other kinds of obligations to the extent consistent with its investment objective and limitations. Such obligations may be issued for different purposes and with different security than those mentioned.

Stand-By Commitments

Each Fund may acquire stand-by commitments with respect to municipal obligations held in its portfolios. Under a stand-by commitment, a broker-dealer, dealer, or bank would agree to purchase, at the Fund’s option, a specified municipal security at a specified price. Thus, a stand-by commitment may be viewed as the equivalent of a put option acquired by a fund with respect to a particular municipal security held in the Fund's portfolio.

The amount payable to a Fund upon its exercise of a stand-by commitment normally would be 1) the acquisition cost of the municipal security (excluding any accrued interest that the fund paid on the acquisition), less any amortized market premium or plus any amortized market or original issue discount during the period the fund owned the security, plus, 2) all interest accrued on the security since the last interest payment date during the period the security was owned by the fund. Absent unusual circumstances, the fund would value the underlying municipal security at amortized cost. As a result, the amount payable by the broker-dealer, dealer or bank during the time a stand-by commitment is exercisable would be substantially the same as the value of the underlying municipal obligation.

A Fund’s right to exercise a stand-by commitment would be unconditional and unqualified. Although the Fund could not transfer a stand-by commitment, it could sell the underlying municipal security to a third party at any time. It is expected that stand-by commitments generally will be available to the Fund without the payment of any direct or indirect consideration. The Fund may, however, pay for stand-by commitments if such action is deemed necessary. In any event, the total amount paid for outstanding stand-by commitments held in the Fund's portfolio would not exceed 0.50% of the value of the Fund’s total assets calculated immediately after each stand-by commitment is acquired.

Each Fund intends to enter into stand-by commitments only with broker-dealers, dealers, or banks that those managing the Fund's investments believe present minimum credit risks. A Fund’s ability to exercise a stand-by commitment will depend upon the ability of the issuing institution to pay for the underlying securities at the time the stand-by commitment is exercised. The credit of each institution issuing a stand-by commitment to a fund will be evaluated on an ongoing basis by those managing the Fund's investments.

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Each Fund intends to acquire stand-by commitments solely to facilitate portfolio liquidity and does not intend to exercise its right thereunder for trading purposes. The acquisition of a stand-by commitment would not affect the valuation of the underlying municipal security. Each stand-by commitment will be valued at zero in determining net asset value. Should a Fund pay directly or indirectly for a stand-by commitment, its costs will be reflected in realized gain or loss when the commitment is exercised or expires. The maturity of a municipal security purchased by a Fund will not be considered shortened by any stand-by commitment to which the obligation is subject. Thus, stand-by commitments will not affect the dollar-weighted average maturity of a Fund's portfolio.

Variable and Floating Rate Obligations

Certain Municipal Obligations, obligations issued or guaranteed by the U.S. Government or its agencies or instrumentalities, and debt instruments issued by domestic banks or corporations may carry variable or floating rates of interest. Such instruments bear interest at rates which are not fixed, but which vary with changes in specified market rates or indices, such as a bank prime rate or tax-exempt money market index. Variable rate notes are adjusted to current interest rate levels at certain specified times, such as every 30 days. A floating rate note adjusts automatically whenever there is a change in its base interest rate adjustor, e.g., a change in the prime lending rate or specified interest rate indices. Typically such instruments carry demand features permitting the fund to redeem at par.

The fund's right to obtain payment at par on a demand instrument upon demand could be affected by events occurring between the date the fund elects to redeem the instrument and the date redemption proceeds are due which affects the ability of the issuer to pay the instrument at par value. Those managing the Fund's investments monitor on an ongoing basis the pricing, quality, and liquidity of such instruments and similarly monitor the ability of an issuer of a demand instrument, including those supported by bank letters of credit or guarantees, to pay principal and interest on demand. Although the ultimate maturity of such variable rate obligations may exceed one year, the fund treats the maturity of each variable rate demand obligation as the longer of a) the notice period required before the fund is entitled to payment of the principal amount through demand or b) the period remaining until the next interest rate adjustment. Floating rate instruments with demand features are deemed to have a maturity equal to the period remaining until the principal amount can be recovered through demand.

Each Fund may purchase participation interests in variable rate Municipal Obligations (such as industrial development bonds). A participation interest gives the purchaser an undivided interest in the Municipal Obligation in the proportion that its participation interest bears to the total principal amount of the Municipal Obligation. Each Fund has the right to demand payment on seven days' notice, for all or any part of the Fund's participation interest in the Municipal Obligation, plus accrued interest. Each participation interest is backed by an irrevocable letter of credit or guarantee of a bank. Banks will retain a service and letter of credit fee and a fee for issuing repurchase commitments in an amount equal to the excess of the interest paid on the Municipal Obligations over the negotiated yield at which the instruments were purchased by the Fund.

Risks of Municipal Obligations

The yields on Municipal Obligations are dependent on a variety of factors, including general economic and monetary conditions, money market factors, conditions in the Municipal Obligations market, size of a particular offering, maturity of the obligation, and rating of the issue. Each Fund's ability to achieve its investment objective also depends on the continuing ability of the issuers of the Municipal Obligations in which it invests to meet its obligation for the payment of interest and principal when due.

Municipal Obligations are subject to the provisions of bankruptcy, insolvency, and other laws affecting the rights and remedies of creditors, such as the Federal Bankruptcy Act. They are also subject to federal or state laws, if any, which extend the time for payment of principal or interest, or both, or impose other constraints upon enforcement of such obligations or upon municipalities to levy taxes. The power or ability of issuers to pay, when due, principal of and interest on Municipal Obligations may also be materially affected by the results of litigation or other conditions.

From time to time, proposals have been introduced before Congress for the purpose of restricting or eliminating the federal income tax exemption for interest on Municipal Obligations. It may be expected that similar proposals will be introduced in the future. If such a proposal was enacted, the ability of a Fund to pay "exempt interest" dividends may be adversely affected. The Fund would reevaluate its investment objective and policies and consider changes in its structure.

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Pay-in-Kind Securities

Each Fund may invest in pay-in-kind securities. Pay-in-kind securities pay dividends or interest in the form of additional securities of the issuer, rather than in cash. These securities are usually issued and traded at a discount from their face amounts. The amount of the discount varies depending on various factors, such as the time remaining until maturity of the securities, prevailing interest rates, the liquidity of the security and the perceived credit quality of the issuer. The market prices of pay-in-kind securities generally are more volatile than the market prices of securities that pay interest periodically and are likely to respond to changes in interest rates to a greater degree than are other types of securities having similar maturities and credit quality.

Portfolio Turnover (Active Trading)

Portfolio turnover is a measure of how frequently a portfolio's securities are bought and sold. The portfolio turnover rate is generally calculated as the dollar value of the lesser of a portfolio's purchases or sales of shares of securities during a given year, divided by the monthly average value of the portfolio securities during that year (excluding securities whose maturity or expiration at the time of acquisition were less than one year). For example, a portfolio reporting a 100% portfolio turnover rate would have purchased and sold securities worth as much as the monthly average value of its portfolio securities during the year.

It is not possible to predict future turnover rates with accuracy. Many variable factors are outside the control of a portfolio manager. The investment outlook for the securities in which a portfolio may invest may change as a result of unexpected developments in securities markets, economic or monetary policies, or political relationships. High market volatility may result in a portfolio manager using a more active trading strategy than might otherwise be employed. Each portfolio manager considers the economic effects of portfolio turnover but generally does not treat the portfolio turnover rate as a limiting factor in making investment decisions.

Sale of shares by investors may require the liquidation of portfolio securities to meet cash flow needs. In addition, changes in a particular portfolio's holdings may be made whenever the portfolio manager considers that a security is no longer appropriate for the portfolio or that another security represents a relatively greater opportunity. Such changes may be made without regard to the length of time that a security has been held.

Higher portfolio turnover rates generally increase transaction costs that are expenses of the Account. Active trading may generate short-term gains (losses) for taxable shareholders.

The following Funds had significant variation in portfolio turnover rates over the two most recently completed fiscal years:

Fund	2018 Turnover	2017 Turnover	Comments
Principal EDGE Active Income ETF	11.0%	30.7%	The turnover was higher in 2017 due to growth in assets under management resulting in more trading activity as the strategy generally executes cash creation of units vs. in-kind redemptions through the AP.
Principal Millennials Index ETF	35.6%	5.1%	The turnover was lower in 2017 due to the way the portfolios were rebalanced (doing in-kind redemptions through the AP).
Principal Price Setters Index ETF	63.5%	2.0%	The turnover was lower in 2017 due to the way the portfolios were rebalanced (doing in-kind redemptions through the AP).
Principal Shareholder Yield Index ETF	55.5%	3.0%	The turnover was lower in 2017 due to the way the portfolios were rebalanced (doing in-kind redemptions through the AP).

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Preferred Securities

Preferred securities can include: traditional preferred securities, hybrid-preferred securities, $25 par hybrid preferred securities, baby bonds, U.S. dividend received deduction (“DRD”) preferred stock, fixed rate and floating rate adjustable preferred securities, step-up preferred securities, public and 144A $1000 par capital securities including U.S. agency subordinated debt issues, trust originated preferred securities, monthly income preferred securities, quarterly income bond securities, quarterly income debt securities, quarterly income preferred securities, corporate trust securities, public income notes, and other trust preferred securities.

• Traditional Preferred Securities. Traditional preferred securities may be issued by an entity taxable as a corporation and pay fixed or floating rate dividends. However, these claims are subordinated to more senior creditors, including senior debt holders. “Preference” means that a company must pay dividends on its preferred securities before paying any dividends on its common stock, and the claims of preferred securities holders are ahead of common stockholders’ claims on assets in a corporate liquidation. Holders of preferred securities usually have no right to vote for corporate directors or on other matters. Preferred securities share many investment characteristics with both common stock and bonds.

• Hybrid or Trust Preferred Securities. Hybrid-preferred securities are debt instruments that have characteristics similar to those of traditional preferred securities (characteristics of both subordinated debt and preferred stock). Hybrid preferred securities may be issued by corporations, generally in the form of interest-bearing instruments with preferred securities characteristics, or by an affiliated trust or partnership of the corporation, generally in the form of preferred interests in subordinated business trusts or similarly structured securities. The hybrid-preferred securities market consists of both fixed and adjustable coupon rate securities that are either perpetual in nature or have stated maturity dates. Hybrid preferred holders generally have claims to assets in a corporate liquidation that are senior to those of traditional preferred securities but subordinate to those of senior debt holders. Certain subordinated debt and senior debt issues that have preferred characteristics are also considered to be part of the broader preferred securities market.

Preferred securities may be issued by trusts (likely one that is wholly-owned by a financial institution or other corporate entity, typically a bank holding company) or other special purpose entities established by operating companies, and are therefore not direct obligations of operating companies. The financial institution creates the trust and owns the trust’s common securities. The trust uses the sale proceeds of its preferred securities to purchase, for example, subordinated debt issued by the financial institution. The financial institution uses the proceeds from the subordinated debt sale to increase its capital while the trust receives periodic interest payments from the financial institution for holding the subordinated debt. The trust uses the funds received to make dividend payments to the holders of the trust preferred securities. The primary advantage of this structure may be that the trust preferred securities are treated by the financial institution as debt securities for tax purposes and as equity for the calculation of capital requirements.

Trust preferred securities typically bear a market rate coupon comparable to interest rates available on debt of a similarly rated issuer. Typical characteristics include long-term maturities, early redemption by the issuer, periodic fixed or variable interest payments, and maturities at face value. Holders of trust preferred securities have limited voting rights to control the activities of the trust and no voting rights with respect to the financial institution. The market value of trust preferred securities may be more volatile than those of conventional debt securities. Trust preferred securities may be issued in reliance on Rule 144A under the 1933 Act and subject to restrictions on resale. There can be no assurance as to the liquidity of trust preferred securities and the ability of holders, such as the Funds, to sell its holdings. The condition of the financial institution can be looked to identify the risks of trust preferred securities as the trust typically has no business operations other than to issue the trust preferred securities. If the financial institution defaults on interest payments to the trust, the trust will not be able to make dividend payments to holders of its securities, such as the Funds.

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• Floating rate preferred securities provide for a periodic adjustment in the interest rate paid on the securities. The terms of such securities provide that interest rates are adjusted periodically based upon an interest rate adjustment index. The adjustment intervals may be regular, and range from daily up to annually, or may be event-based, such as a change in the short-term interest rate. Because of the interest rate reset feature, floating rate securities provide a Fund with a certain degree of protection against rising interest rates, although the interest rates of floating rate securities will participate in any declines in interest rates as well.

If a portion of a Fund’s income consists of dividends paid by U.S. corporations, a portion of the dividends paid by the fund may be eligible for the corporate dividends-received deduction for corporate shareholders. In addition, distributions reported by a Fund as derived from qualified dividend income (“QDI”) will be taxed in the hands of individuals at the reduced rates applicable to net capital gains, provided certain holding period and other requirements are met by both the shareholder and the fund. Dividend income that a Fund receives from REITs, if any, will generally not be treated as QDI and will not qualify for the corporate dividends-received deduction. It is unclear the extent to which distributions a Fund receives from investments in certain preferred securities will be eligible for treatment as QDI or for the corporate dividends-received deduction. The Funds cannot predict at this time what portion, if any, of their dividends will qualify for the corporate dividends-received deduction or be eligible for the reduced rates of taxation applicable to QDI.

Real Estate Investment Trusts (“REITs”)

REITs are pooled investment vehicles that invest in income producing real estate, real estate related loans, or other types of real estate interests. U.S. REITs are allowed to eliminate corporate level federal tax so long as they meet certain requirements of the Internal Revenue Code. Foreign REITs ("REIT-like") entities may have similar tax treatment in their respective countries. Equity real estate investment trusts own real estate properties, while mortgage real estate investment trusts make and/or invests in construction, development, and long-term mortgage loans. Their value may be affected by changes in the underlying property of the trusts, the creditworthiness of the issuer, property taxes, interest rates, and tax and regulatory requirements, such as those relating to the environment. Both types of trusts are not diversified, are dependent upon management skill, are subject to heavy cash flow dependency, defaults by borrowers, self-liquidation, and the possibility of failing to qualify for tax-free status of income under the Internal Revenue Code and failing to maintain exemption from the 1940 Act. In addition, foreign REIT-like entities will be subject to foreign securities risks. (See "Foreign Securities").

Repurchase and Reverse Repurchase Agreements, Mortgage Dollar Rolls and Sale-Buybacks

Each Fund may invest in repurchase and reverse repurchase agreements. Repurchase agreements typically involve the purchase of debt securities from a financial institution such as a bank, savings and loan association, or broker-dealer. A repurchase agreement provides that the fund sells back to the seller and that the seller repurchases the underlying securities at a specified price on a specific date. Repurchase agreements may be viewed as loans by a fund collateralized by the underlying securities. This arrangement results in a fixed rate of return that is not subject to market fluctuation while the fund holds the security. In the event of a default or bankruptcy by a selling financial institution, the affected fund bears a risk of loss. To minimize such risks, the fund enters into repurchase agreements only with parties those managing the fund's investments deem creditworthy (those that are large, well-capitalized, and well-established financial institutions). In addition, the value of the securities collateralizing the repurchase agreement is, and during the entire term of the repurchase agreement remains, at least equal to the acquisition price the Funds pay to the seller of the securities.

In a repurchase agreement, the Fund purchases a security and simultaneously commits to resell that security to the seller at an agreed upon price on an agreed upon date within a number of days (usually not more than seven) from the date of purchase. The resale price consists of the purchase price plus an amount that is unrelated to the coupon rate or maturity of the purchased security. A repurchase agreement involves the obligation of the seller to pay the agreed upon price, which obligation is in effect secured by the value (at least equal to the amount of the agreed upon resale price and marked-to-market daily) of the underlying security or "collateral." A risk associated with repurchase agreements is the failure of the seller to repurchase the securities as agreed, which may cause the Fund to suffer a loss if the market value of such securities declines before they can be liquidated on the open market. In the event of bankruptcy or insolvency of the seller, the Fund may encounter delays and incur costs in liquidating the underlying security. Repurchase agreements that mature in more than seven days are subject to the Fund's limit on illiquid investments. While it is not possible to eliminate all risks from these transactions, it is the policy of the Fund to limit repurchase agreements to those parties whose creditworthiness has been reviewed and found satisfactory by those managing the Fund's investments.

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Each Fund may use reverse repurchase agreements, mortgage dollar rolls, and economically similar transactions to obtain cash to satisfy unusually heavy redemption requests or for other temporary or emergency purposes without the necessity of selling portfolio securities, or to earn additional income on portfolio securities, such as Treasury bills or notes. In a reverse repurchase agreement, the Fund sells a portfolio security to another party, such as a bank or broker-dealer, in return for cash and agrees to repurchase the instrument at a particular price and time. While a reverse repurchase agreement is outstanding, the Fund will maintain cash or appropriate liquid assets to cover its obligation under the agreement. A Fund will enter into reverse repurchase agreements only with parties that those managing the Fund's investments deem creditworthy. Using reverse repurchase agreements to earn additional income involves the risk that the interest earned on the invested proceeds is less than the expense of the reverse repurchase agreement transaction. This technique may also have a leveraging effect on a Fund, although the Fund's intent to segregate assets in the amount of the reverse repurchase obligation minimizes this effect.

A “mortgage dollar roll” is similar to a reverse repurchase agreement in certain respects. In a “dollar roll” transaction a Fund sells a mortgage-related security, such as a security issued by the Government National Mortgage Association, to a dealer and simultaneously agrees to repurchase a similar security (but not the same security) in the future at a pre-determined price. A dollar roll can be viewed, like a reverse repurchase agreement, as a collateralized borrowing in which the Fund pledges a mortgage-related security to a dealer to obtain cash. Unlike in the case of reverse repurchase agreements, the dealer with which the Fund enters into a dollar roll transaction is not obligated to return the same securities as those originally sold by the Fund, but only securities which are “substantially identical.” To be considered “substantially identical,” the securities returned to the Fund generally must: 1) be collateralized by the same types of underlying mortgages; 2) be issued by the same agency and be part of the same program; 3) have a similar original stated maturity; 4) have identical net coupon rates; 5) have similar market yields (and therefore price); and 6) satisfy “good delivery” requirements, meaning that the aggregate principal amounts of the securities delivered and received back must be within 0.01% of the initial amount delivered.

A Fund's obligations under a dollar roll agreement must be covered by segregated liquid assets equal in value to the securities subject to repurchase by the Fund.

Each Fund also may effect simultaneous purchase and sale transactions that are known as “sale-buybacks.” A sale-buyback is similar to a reverse repurchase agreement, except that in a sale-buyback, the counterparty who purchases the security is entitled to receive any principal or interest payments made on the underlying security pending settlement of the Fund's repurchase of the underlying security. A Fund's obligations under a sale-buyback typically would be segregated by liquid assets equal in value to the amount of the Fund's forward commitment to repurchase the subject security.

Restricted and Illiquid Securities

A fund may experience difficulty in valuing and selling illiquid securities and, in some cases, may be unable to value or sell certain illiquid securities for an indefinite period of time. Illiquid securities may include a wide variety of investments, such as (1) repurchase agreements maturing in more than seven days (unless the agreements have demand/redemption features), (2) OTC options contracts and certain other derivatives (including certain swap agreements), (3) fixed time deposits that are not subject to prepayment or do not provide for withdrawal penalties upon prepayment (other than overnight deposits), (4) loan interests and other direct debt instruments, (5) certain municipal lease obligations, (6) commercial paper issued pursuant to Section 4(2) of the 1933 Act, (7) thinly-traded securities, and (8) securities whose resale is restricted under the federal securities laws or contractual provisions (including restricted, privately placed securities that, under the federal securities laws, generally may be resold only to qualified institutional buyers). Generally, restricted securities may be sold only in a public offering for which a registration statement has been filed and declared effective or in a transaction that is exempt from the registration requirements of the Securities Act of 1933. When registration is required, a fund that owns restricted securities may be obligated to pay all or part of the registration expenses and a considerable period may elapse between the time of the decision to sell and the time the Fund may be permitted to sell a restricted security. If adverse market conditions were to develop during such a period, the fund might obtain a less favorable price than existed when it decided to sell.

Illiquid and restricted securities are priced at fair value as determined in good faith by or under the direction of the Trustees. Each Fund has adopted investment restrictions that limit its investments in illiquid securities to no more than 15% of its net assets. The Trustees have adopted procedures to determine the liquidity of Rule 4(2) short-term paper and of restricted securities that may be resold under Rule 144A. Securities determined to be liquid under these procedures are excluded from the preceding investment restriction.

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Securitized Products (Mortgage- and Asset-Backed Securities)

The yield characteristics of the mortgage- and asset-backed securities in which a Fund may invest differ from those of traditional debt securities. Among the major differences are that the interest and principal payments are made more frequently on mortgage- and asset-backed securities (usually monthly) and that principal may be prepaid at any time because the underlying mortgage loans or other assets generally may be prepaid at any time. As a result, if a Fund purchases those securities at a premium, a prepayment rate that is faster than expected will reduce their yield, while a prepayment rate that is slower than expected will have the opposite effect of increasing yield. If a Fund purchases these securities at a discount, faster than expected prepayments will increase their yield, while slower than expected prepayments will reduce their yield. Amounts available for reinvestment by a Fund are likely to be greater during a period of declining interest rates and, as a result, are likely to be reinvested at lower interest rates than during a period of rising interest rates.

In general, the prepayment rate for mortgage-backed securities decreases as interest rates rise and increases as interest rates fall. However, rising interest rates will tend to decrease the value of these securities. In addition, an increase in interest rates may affect the volatility of these securities by effectively changing a security that was considered a short-term security at the time of purchase into a long-term security. Long-term securities generally fluctuate more widely in response to changes in interest rates than short- or medium-term securities.

The market for privately issued mortgage- and asset-backed securities is smaller and less liquid than the market for U.S. government mortgage-backed securities. A collateralized mortgage obligation (“CMO”) may be structured in a manner that provides a wide variety of investment characteristics (yield, effective maturity, and interest rate sensitivity). As market conditions change, and especially during periods of rapid market interest rate changes, the ability of a CMO to provide the anticipated investment characteristics may be greatly diminished. Increased market volatility and/or reduced liquidity may result.

Each Fund may invest in each of collateralized bond obligations (“CBOs”), collateralized loan obligations (“CLOs”), other collateralized debt obligations (“CDOs”) and other similarly structured securities. CBOs, CLOs and other CDOs are types of asset-backed securities. A CBO is a trust which is often backed by a diversified pool of high risk, below investment grade fixed income securities. The collateral can be from many different types of fixed income securities such as high yield debt, residential privately issued mortgage-related securities, commercial privately issued mortgage-related securities, trust preferred securities and emerging market debt. A CLO is a trust typically collateralized by a pool of loans, which may include, among others, domestic and foreign senior secured loans, senior unsecured loans, and subordinate corporate loans, including loans that may be rated below investment grade or equivalent unrated loans. Other CDOs are trusts backed by other types of assets representing obligations of various parties. CBOs, CLOs and other CDOs may charge management fees and administrative expenses.

Short Sales

A short sale involves the sale by a fund of a security that it does not own with the expectation of covering settlement by purchasing the same security at a later date at a lower price. A fund may also enter into a short position by using a derivative instrument, such as a future, forward, or swap agreement. If the price of the security or derivative increases prior to the time the fund is required to replace the borrowed security, then the fund will incur a loss equal to the increase in price from the time that the short sale was entered into plus any premiums and interest paid to the broker. Therefore, short sales involve the risk that losses may be exaggerated, potentially losing more money than the value of the investment.

A “short sale against the box” is a technique that involves selling either a security owned by a fund, or a security equivalent in kind and amount to the security sold short that the fund has the right to obtain, at no additional cost, for delivery at a specified date in the future. Each Fund may enter into a short sale against the box to hedge against anticipated declines in the market price of portfolio securities. If the value of the securities sold short against the box increases prior to the scheduled delivery date, a fund will lose money.

Supranational Entities

Each Fund may invest in obligations of supranational entities. A supranational entity is an entity designated or supported by national governments to promote economic reconstruction, development or trade amongst nations. Examples of supranational entities include the International Bank for Reconstruction and Development (also known as the World Bank) and the European Investment Bank. Obligations of supranational entities are subject to the risk that the governments on whose support the entity depends for its financial backing or repayment may be unable or unwilling to provide that support. Obligations of a supranational entity that are denominated in foreign currencies will also be subject to the risks associated with investments in foreign currencies.

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Temporary Defensive Measures/Money Market Instruments

Each Fund may make money market investments (cash equivalents), without limit, pending other investment or settlement, for liquidity, or in adverse market conditions. Following are descriptions of the types of money market instruments that each Fund may purchase:

• U.S. Government Securities - Securities issued or guaranteed by the U.S. government, including treasury bills, notes, and bonds.

• U.S. Government Agency Securities - Obligations issued or guaranteed by agencies or instrumentalities of the U.S. government.

• U.S. agency obligations include, but are not limited to, the Bank for Cooperatives, Federal Home Loan Banks, and Federal Intermediate Credit Banks.

• U.S. instrumentality obligations include, but are not limited to, the Export-Import Bank, Federal Home Loan Mortgage Corporation, and Federal National Mortgage Association.

Some obligations issued or guaranteed by U.S. government agencies and instrumentalities are supported by the full faith and credit of the U.S. Treasury. Others, such as those issued by the Federal National Mortgage Association, are supported by discretionary authority of the U.S. government to purchase certain obligations of the agency or instrumentality. Still others, such as those issued by the Student Loan Marketing Association, are supported only by the credit of the agency or instrumentality.

• Bank Obligations - Certificates of deposit, time deposits and bankers' acceptances of U.S. commercial banks having total assets of at least one billion dollars and overseas branches of U.S. commercial banks and foreign banks, which in the opinion of those managing the Fund's investments, are of comparable quality. A Fund may acquire obligations of U.S. banks that are not members of the Federal Reserve System or of the Federal Deposit Insurance Corporation.

Certificates of deposit are negotiable certificates issued against funds deposited in a commercial bank for a definite period of time and earning a specified return. Bankers’ acceptances are negotiable drafts or bills of exchange, normally drawn by an importer or exporter to pay for specific merchandise, which are “accepted” by a bank, meaning, in effect, that the bank unconditionally agrees to pay the face value of the instrument on maturity. Fixed time deposits are bank obligations payable at a stated maturity date and bearing interest at a fixed rate. Fixed time deposits may be withdrawn on demand by the investor, but may be subject to early withdrawal penalties which vary depending upon market conditions and the remaining maturity of the obligation. There are no contractual restrictions on the right to transfer a beneficial interest in a fixed time deposit to a third party, although there is no market for such deposits.

Obligations of foreign banks and obligations of overseas branches of U.S. banks are subject to somewhat different regulations and risks than those of U.S. domestic banks. For example, an issuing bank may be able to maintain that the liability for an investment is solely that of the overseas branch which could expose a Fund to a greater risk of loss. In addition, obligations of foreign banks or of overseas branches of U.S. banks may be affected by governmental action in the country of domicile of the branch or parent bank. Examples of adverse foreign governmental actions include the imposition of currency controls, the imposition of withholding taxes on interest income payable on such obligations, interest limitations, seizure or nationalization of assets, or the declaration of a moratorium. Deposits in foreign banks or foreign branches of U.S. banks are not covered by the Federal Deposit Insurance Corporation and that the selection of those obligations may be more difficult because there may be less publicly available information concerning foreign banks or the accounting, auditing and financial reporting standards, practices and requirements applicable to foreign banks may differ from those applicable to United States banks. Foreign banks are not generally subject to examination by any United States Government agency or instrumentality. The Funds only buy short-term instruments where the risks of adverse governmental action are believed by those managing the Fund's investments to be minimal. The Funds consider these factors, along with other appropriate factors, in making an investment decision to acquire such obligations. A Fund only acquires those which, in the opinion of management, are of an investment quality comparable to other debt securities bought by the Fund.

A certificate of deposit is issued against funds deposited in a bank or savings and loan association for a definite period of time, at a specified rate of return. Normally they are negotiable. However, a Fund occasionally may invest in certificates of deposit which are not negotiable. Such certificates may provide for interest penalties in the event of withdrawal prior to their maturity. A bankers' acceptance is a short-term credit instrument issued by corporations to finance the import, export, transfer, or storage of goods. They are termed "accepted" when a bank guarantees their payment at maturity and reflect the obligation of both the bank and drawer to pay the face amount of the instrument at maturity.

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• Commercial Paper - Short-term promissory notes issued by U.S. or foreign corporations.

• Short-term Corporate Debt - Corporate notes, bonds, and debentures that at the time of purchase have 397 days or less remaining to maturity.

• Repurchase Agreements - Instruments under which securities are purchased from a bank or securities dealer with an agreement by the seller to repurchase the securities at the same price plus interest at a specified rate.

• Taxable Municipal Obligations - Short-term obligations issued or guaranteed by state and municipal issuers which generate taxable income.

LEADERSHIP STRUCTURE AND BOARD OF TRUSTEES

Overall responsibility for directing the business and affairs of the Trust rests with the Board of Trustees, who are elected by the Trust's shareholders. In addition to serving on the Board, each Trustee also serves on the Board of Principal Funds, Inc. (“PFI”) and the Board of Principal Variable Contracts Funds, Inc. (“PVC”). The Board is responsible for overseeing the operations of the Trust in accordance with the provisions of the 1940 Act, other applicable laws and the Trust’s charter. The Board elects the officers of the Trust to supervise its day-to-day operations. The Board meets in regularly scheduled meetings eight times throughout the year. Board meetings may occur in-person or by telephone. In addition, the Board holds special in-person or telephonic meetings or informal conference calls to discuss specific matters that may arise or require action between regular meetings. Board members who are Independent Trustees meet annually to consider renewal of the Trust's advisory contracts. The Board is currently composed of eleven members, nine of whom are Independent Trustees. Each Trustee has significant prior senior management and/or board experience.

The Chairman is an interested person of the Trust. The Independent Trustees of the Trust have appointed a lead Independent Trustee whose role is to review and approve, with the Chairman, the agenda for each Board meeting and facilitate communication among the Trust's Independent Trustees as well as communication between the Independent Trustees, management of the Trust and the full Board. The Trust has determined that the Board's leadership structure is appropriate given the characteristics and circumstances of the Trust, including such items as the number of series or portfolios that comprise the Trust, the net assets of the Trust, the committee structure of the Board and the distribution arrangements of the Trust. The appropriateness of this structure is enhanced by the Trust’s Board Committees, which are described below, and the allocation of responsibilities among them.

The Trustees were selected to serve and continue on the Board based upon their skills, experience, judgment, analytical ability, diligence and ability to work effectively with other Board members, a commitment to the interests of shareholders and, for each Independent Trustee, a demonstrated willingness to take an independent and questioning view of management. In addition to these general qualifications, the Board seeks members who will build upon the diversity of the Board. In addition to those qualifications, the following is a brief discussion of the specific education, experience, qualifications, or skills that led to the conclusion that each person identified below should serve as a Trustee for the Trust. As required by rules the SEC has adopted under the 1940 Act, the Trust's Independent Trustees select and nominate all candidates for Independent Trustee positions.

Independent Trustees

Elizabeth Ballantine. Ms. Ballantine has served as a Trustee of the Trust since 2014 and Director of PFI and PVC since 2004. Through her professional training and experience as an attorney and her experience as a director and investment consultant, Ms. Ballantine is experienced in financial, investment and regulatory matters.

Leroy T. Barnes, Jr. Mr. Barnes has served as a Trustee of the Trust since 2014 and Director of PFI and PVC since 2012. From 2001-2005, Mr. Barnes served as Vice President and Treasurer of PG&E Corporation. From 1997-2001, Mr. Barnes served as Vice President and Treasurer of Gap, Inc. Through his education and employment experience and experience as a director, Mr. Barnes is experienced with financial, accounting, regulatory and investment matters.

Craig Damos. Mr. Damos has served as a Trustee of the Trust since 2014 and Director of PFI and PVC since 2008. Since 2011, Mr. Damos has served as the President of C.P. Damos Consulting LLC dba Craig Damos Consulting. Mr. Damos served as President and Chief Executive Officer of Weitz Company from 2006-2010 and Vertical Growth Officer from 2004-2006. From 2000-2004, he served as the Chief Financial Officer of Weitz Company. From 2005-2008, Mr. Damos served as a director of West Bank. Through his education, experience as a director of Principal Funds and employment experience, Mr. Damos is experienced with financial, accounting, regulatory and investment matters.

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Mark A. Grimmett. Mr. Grimmett has served as a Trustee and Lead Independent Trustee of the Trust since 2014 and Director of PFI and PVC since 2004. He is a Certified Public Accountant. From 1996-2015, Mr. Grimmett served as the Chief Financial Officer for Merle Norman Cosmetics, Inc. Through his service as a director of Principal Funds, his education and his employment experience, Mr. Grimmett is experienced with financial, accounting, regulatory and investment matters.

Fritz S. Hirsch. Mr. Hirsch has served as a Trustee of the Trust since 2014 and Director of PFI and PVC since 2005. From 1983-1985, he served as Chief Financial Officer of Sassy, Inc. From 1986-2009, Mr. Hirsch served as President and Chief Executive Officer of Sassy, Inc. From 2011-2015, Mr. Hirsch served as CEO of MAM USA. Through his experience as a director of the Principal Funds and employment experience, Mr. Hirsch is experienced with financial, accounting, regulatory and investment matters.

Tao Huang. Mr. Huang has served as a Trustee of the Trust since 2014 and Director of PFI and PVC since 2012. From 1996-2000, Mr. Huang served as Chief Technology Officer of Morningstar, Inc. and from 1998-2000 as President of the International Division of Morningstar. From 2000-2011, Mr. Huang served as Chief Operating Officer of Morningstar. Through his education and employment experience, Mr. Huang is experienced with technology, financial, regulatory and investment matters.

Karen (“Karrie”) McMillan. Ms. McMillan has served as a Trustee of the Trust since 2014 and Director of PFI and PVC since 2014. From 2007-2014, Ms. McMillan served as general counsel to the Investment Company Institute. Prior to that (from 1999-2007), she worked as an attorney in private practice, specializing in the mutual fund industry. From 1991-1999, she served in various roles as counsel at the Securities and Exchange Commission, Division of Investment Management, including as Assistant Chief Counsel. Through her professional education and experience as an attorney, she is experienced in financial, investment and regulatory matters.

Elizabeth A. Nickels. Ms. Nickels has served as a Trustee of the Trust since 2015 and Director of PFI and PVC since 2015. Ms. Nickels currently serves as a director of SpartanNash. From 2008 to 2017, she served as a director of the not-for-profit Spectrum Health Systems; from 2014 to 2016, she served as a director of Charlotte Russe; from 2014 to 2015, she served as a director of Follet Corporation; and from 2013 to 2015, she served as a director of PetSmart. Ms. Nickels was formerly employed by Herman Miller, Inc. in several capacities: from 2012 to 2014, as the Executive Director of the Herman Miller Foundation; from 2007 to 2012, as President of Herman Miller Healthcare; and from 2000 to 2007, as Chief Financial Officer. Through her education and employment experience, she is experienced with financial, accounting and regulatory matters.

Mary M. (“Meg”) VanDeWeghe. Ms. VanDeWeghe has served as a Trustee of the Trust and Director of PFI and PVC since 2018. She is CEO and President of Forte Consulting, Inc., a management and financial consulting firm, and was previously employed as a Finance Professor at Georgetown University from 2009-2016, Senior Vice President - Finance at Lockheed Martin Corporation from 2006-2009, a Finance Professor at the University of Maryland from 1996-2006, and in various positions at J.P. Morgan from 1983-1996. Ms. VanDeWeghe served as a director of Brown Advisory from 2003-2018, B/E Aerospace from 2014-2017, WP Carey from 2014-2017, and Nalco (and its successor Ecolab) from 2009-2014. Through her education and employment experience, and her experience as a director, she is experienced with financial, investment and regulatory matters.

Interested Trustees

Michael J. Beer. Mr. Beer has served as a Trustee of the Trust since 2013 and Director of PFI and PVC since 2012. Mr. Beer has served as Chief Executive Officer and President of the Trust, PFI and PVC since 2015. Mr. Beer previously served as Executive Vice President of PFI and PVC (2001-2015) and the Trust (2014-2015). Mr. Beer also served as Executive Vice President (2008-2015), Chief Operating Officer (2008-2015) and director of Principal Management Corporation ("PMC") (2006-2017), prior to PMC's merger with and into Principal Global Investors, LLC ("PGI"). Mr. Beer has also served as the President and a director of PSI and PSS. Mr. Beer serves as Executive Director - Funds and Director of PGI. Prior to working for PMC, Mr. Beer worked for Wells Fargo and Deloitte Touche. Through his education and employment experience, Mr. Beer is experienced with financial, accounting, regulatory and investment matters.

Patrick G. Halter. Mr. Halter has served as a Trustee of the Trust and Director of PFI and PVC since 2017. Mr. Halter also serves as Chief Executive Officer, President and director of PGI, and Chief Executive Officer and Chair of Principal Real Estate Investors ("Principal - REI"). He has served in various other positions since joining Principal^® in 1984. Through his education and employment experience, Mr. Halter is experienced with financial, accounting, regulatory and investment matters.

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Risk oversight forms part of the Board's general oversight of the Trust and is addressed as part of various Board and Committee activities. As part of its regular oversight of the Trust, the Board, directly or through a Committee, interacts with and reviews reports from, among others, Fund management, sub-advisors, the Trust's Chief Compliance Officer, the independent registered public accounting firm for the Trust, and internal auditors for PGI or its affiliates, as appropriate, regarding risks faced by the Trust. The Board, with the assistance of Fund management and PGI, reviews investment policies and risks in connection with its review of the Trust's performance. The Board has appointed a Chief Compliance Officer who oversees the implementation and testing of the Trust's compliance program and reports to the Board regarding compliance matters for the Trust and its principal service providers. In addition, as part of the Board's periodic review of the Trust's advisory, sub-advisory, and other service provider agreements, the Board may consider risk management aspects of their operations and the functions for which they are responsible. With respect to valuation, the Board oversees a PGI valuation committee and has approved and periodically reviews valuation policies applicable to valuing the Trust's shares.

The Board has established the following committees and the membership of each committee to assist in its oversight functions, including its oversight of the risks the Trust faces.

Committee membership is identified on the following pages. Each committee must report its activities to the Board on a regular basis. As used in this SAI, the “Fund Complex” refers to all series of the Trust, PFI and PVC.

15(c) Committee

The Committee’s primary purpose is to assist the Board in performing the annual review of the Trust’s advisory and sub-advisory agreements pursuant to Section 15(c) of the 1940 Act. The Committee responsibilities include requesting and reviewing materials. The 15(c) Committee held five meetings during the last fiscal year.

Audit Committee

The primary purpose of the Committee is to assist the Board in fulfilling certain of its responsibilities. The Audit Committee serves as an independent and objective party to monitor the Fund Complex's accounting policies, financial reporting and internal control system, as well as the work of the independent registered public accountants. The Audit Committee assists Board oversight of 1) the integrity of the Fund Complex's financial statements; 2) the Fund Complex's compliance with certain legal and regulatory requirements; 3) the independent registered public accountants' qualifications and independence; and 4) the performance of the Fund Complex's independent registered public accountants. The Audit Committee also provides an open avenue of communication among the independent registered public accountants, the Manager's internal auditors, Fund Complex management, and the Board. The Audit Committee held seven meetings during the last fiscal year.

Executive Committee

The Committee's primary purpose is to exercise certain powers of the Board when the Board is not in session. When the Board is not in session, the Committee may exercise all powers of the Board in the management of the business of the Fund Complex except the power to 1) issue stock, except as permitted by law; 2) recommend to the stockholders any action which requires stockholder approval; 3) amend the bylaws; or 4) approve any merger or share exchange which does not require stockholder approval. The Executive Committee held no meetings during the last fiscal year.

Nominating and Governance Committee

The Committee’s primary purpose is to oversee the structure and efficiency of the Board and the committees established by the Board. The Committee responsibilities include evaluating Board membership and functions, committee membership and functions, insurance coverage, and legal matters.

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The nominating functions of the Nominating and Governance Committee include selecting and nominating all candidates who are not "interested persons" of the Fund Complex for election to the Board. Generally, the Committee requests trustee nominee suggestions from the committee members and management. In addition, the Committee will consider Trustee candidates recommended by shareholders of the Fund Complex. Recommendations should be submitted in writing to Principal Exchange-Traded Funds at 711 High Street, Des Moines, Iowa 50392. When evaluating a person as a potential nominee to serve as an Independent Trustee, the Committee will generally consider, among other factors: age; education; relevant business experience; geographical factors; whether the person is "independent" and otherwise qualified under applicable laws and regulations to serve as a trustee; and whether the person is willing to serve, and willing and able to commit the time necessary for attendance at meetings and the performance of the duties of an independent trustee. The Committee also meets personally with the nominees and conducts a reference check. The final decision is based on a combination of factors, including the strengths and the experience an individual may bring to the Board. The Committee believes the Board generally benefits from diversity of background, experience and views among its members, and considers these factors in evaluating the composition of the Board. The Board does not use regularly the services of any professional search firms to identify or evaluate or assist in identifying or evaluating potential candidates or nominees. The Nominating and Governance Committee held five meetings during the last fiscal year.

Operations Committee

The Committee's primary purpose is to oversee the provision of administrative and distribution services to the Fund Complex, communications with the Fund Complex's shareholders, and review and oversight of the Fund Complex's operations. The Operations Committee held four meetings during the last fiscal year.

Management Information

The following table presents certain information regarding the Trustees of the Trust, including their principal occupations which, unless specific dates are shown, are of more than five years duration. In addition, the table includes information concerning other directorships held by each Trustee in reporting companies under the Securities Exchange Act of 1934 or registered investment companies under the 1940 Act. Information is listed separately for those Trustees who are “interested persons” (as defined in the 1940 Act) of the Trust (the “Interested Trustees”) and those Trustees who are Independent Trustees. All Trustees serve also serve as directors for the other investment companies sponsored by Principal Life Insurance Company (“Principal Life”): PFI and PVC.

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The following Trustees are considered to be Independent Trustees.

Name, Address, and Year of Birth	Position(s) Held with the Trust and Length of Time Served as Trustee	Principal Occupation(s) During Past 5 Years	Number of Portfolios in Fund Complex Overseen by Trustee	Other Directorships Held by Trustee During Past 5 Years
Elizabeth Ballantine 711 High Street Des Moines, IA 50392 1948	Trustee (since 2014) Member Nominating and Governance Committee	Principal, EBA Associates (consulting and investments)	132	Durango Herald, Inc.; McClatchy Newspapers, Inc.
Leroy T. Barnes, Jr. 711 High Street Des Moines, IA 50392 1951	Trustee (since 2014) Member, Audit Committee	Retired	132	McClatchy Newspapers, Inc.; Herbalife Ltd.; Frontier Communications, Inc.
Craig Damos 711 High Street Des Moines, IA 50392 1954	Trustee (since 2014) Member 15(c) Committee Member Audit Committee	President, C.P. Damos Consulting LLC	132	None
Mark A. Grimmett 711 High Street Des Moines, IA 50392 1960	Lead Independent Trustee, Trustee (since 2014) Member 15(c) Committee Member Executive Committee Member Nominating and Governance Committee	Formerly, Executive Vice President and CFO, Merle Norman Cosmetics, Inc. (cosmetics manufacturing)	132	None
Fritz S. Hirsch 711 High Street Des Moines, IA 50392 1951	Trustee (since 2014) Member 15(c) Committee Member Operations Committee	Formerly CEO, MAM USA (manufacturer of infant and juvenile products).	132	MAM USA
Tao Huang 711 High Street Des Moines, IA 50392 1962	Trustee (since 2014) Member 15(c) Committee Member Operations Committee	Retired	132	Armstrong World Industries, Inc. (manufacturing)
Karen (“Karrie”) McMillan 711 High Street Des Moines, IA 50392 1961	Trustee (since 2014) Member Operations Committee	Managing Director, Patomak Global Partners, LLC (financial services consulting). Formerly, General Counsel, Investment Company Institute	132	None
Elizabeth A. Nickels 711 High Street Des Moines, IA 50392 1962	Trustee (since 2015) Member Audit Committee	Formerly Executive Director, Herman Miller Foundation; Formerly President Herman Miller Healthcare	132	SpartanNash; formerly: Charlotte Russe, Follet Corporation, PetSmart, Spectrum Health Systems
Mary M. (“Meg”) VanDeWeghe 711 High Street Des Moines, IA 50392 1959	Trustee (since 2018) Member Operations Committee	CEO and President, Forte Consulting, Inc. (financial and management consulting)	132	Denbury Resources Inc.; formerly: Brown Advisory, B/E Aerospace, WP Carey Nalco (and its successor Ecolab)

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The following Trustees are considered to be Interested Trustees because they are affiliated persons of Principal Global Investors, LLC (“PGI” or the “Manager”).

Name, Address, and Year of Birth	Position(s) Held with Fund and Length of Time Served	Positions with PGI and its affiliates; Principal Occupation(s) During Past 5 Years** (unless noted otherwise)	Number of Portfolios in Fund Complex Overseen by Trustee	Other Directorships Held by Trustee During Past 5 Years
Michael J. Beer Des Moines, IA 50392 1961	Trustee (since 2014) Chief Executive Officer and President (since 2015) Executive Vice President (2014-2015) Member Executive Committee	Executive Director - Funds and Director, PGI (since 2017) Chief Executive Officer and Director, PFD (since 2015) Executive Director/Principal Funds & Trust, PLIC (since 2015) VP/Chief Operating Officer Principal Funds, PLIC (2014-2015) VP/Mutual Funds & Broker Dealer, PLIC (2001-2014) President, Chief Executive Officer, and Chair, PMC (2015-2017) EVP/Chief Operating Officer, PMC (2008-2015) Director, PMC (2006-2015) President and Director, PSI (2005-2015) Chairman and Executive Vice President, PSS (since 2015) President and Director, PSS (2007-2015)	132	None
Patrick G. Halter Des Moines, IA 50392 1959	Trustee (since 2017)	Chief Executive Officer and President, PGI (since 2018) Chief Operating Officer, PGI (2017-2018) Chair, PGI (since 2018) Director, PGI (2003-2018) Director, Finisterre (since 2018) Director, Origin (since 2018) Chair, Post (since 2017) Chief Executive Officer, Principal - REI (since 2005) Chair, Principal - REI (since 2004) Chair, Spectrum (since 2017)	132	None

**   Abbreviations used:

•     Finisterre Capital LLP (Finisterre)

•     Origin Asset Management LLP (Origin)

•     Post Advisory Group, LLC (Post)

•     Principal Financial Advisors, Inc. (PFA)

•     Principal Funds Distributor, Inc. (PFD)

•     Principal Life Insurance Company (PLIC)

•     Principal Management Corporation (PMC), now PGI

• Principal Real Estate Investors, LLC (Principal - REI)

• Principal Securities, Inc. (PSI)

•     Principal Shareholder Services, Inc. (PSS)

•     Spectrum Asset Management, Inc. (Spectrum)

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Officers of the Trust

The following table presents certain information regarding the officers of the Trust, including their principal occupations which, unless specific dates are shown, are of more than five years duration. Officers serve at the pleasure of the Board. Each officer of the Trust has the same position with PFI and PVC.

Name, Address and Year of Birth	Position(s) Held with Trust and Length of Time Served	Positions with PGI and its Affiliates; Principal Occupations During Past 5 Years** (unless noted otherwise)
Michael J. Beer 711 High Street Des Moines, IA 50392 1961	President and Chief Executive Officer (since 2015) Executive Vice President (2014-2015) Trustee (since 2013) Member Executive Committee	Executive Director - Funds and Director, PGI (since 2017) Chief Executive Officer and Director, PFD (since 2015) Executive Director/Principal Funds & Trust, PLIC (since 2015) VP/Chief Operating Officer Principal Funds, PLIC (2014-2015) VP/Mutual Funds & Broker Dealer, PLIC (2001-2014) President, Chief Executive Officer, and Chair, PMC (2015-2017) EVP/Chief Operating Officer, PMC (2008-2015) Director, PMC (2006-2015) President and Director, PSI (2005-2015) Chairman and Executive Vice President, PSS (since 2015) President and Director, PSS (2007-2015)
Randy L. Bergstrom 711 High Street Des Moines, IA 50392 1955	Assistant Tax Counsel (since 2014)	Counsel, PGI Counsel, PLIC
Jennifer A. Block 711 High Street Des Moines, IA 50392 1973	Deputy Chief Compliance Officer (since 2018) Vice President and Counsel (2017-2018) Assistant Counsel (2014-2017) Assistant Secretary (2015-2018)	Counsel, PGI (2017-2018) Counsel, PLIC (2009-2018) Counsel, PMC (2009-2013, 2014-2017)
Tracy W. Bollin 711 High Street Des Moines, IA 50392 1970	Chief Financial Officer (since 2014)	Managing Director, PGI (since 2016) Chief Financial Officer, PFA (2010-2015) Senior Vice President, PFD (since 2015) Chief Financial Officer, PFD (2010-2016) Chief Operating Officer and Senior Vice President, PMC (2015-2017) Director, PMC (2014-2017) Chief Financial Officer, PMC (2010-2015) Chief Financial Officer, PSI (2010-2015) President, PSS (since 2015) Director, PSS (since 2014) Chief Financial Officer, PSS (2010-2015)
Gina L. Graham 711 High Street Des Moines, IA 50392 1965	Treasurer (since 2016)	Vice President/Treasurer, PGI (since 2016) Vice President/Treasurer, PFA (since 2016) Vice President/Treasurer, PFD (since 2016) Vice President/Treasurer, PLIC (since 2016) Vice President/Treasurer, PMC (2016-2017) Vice President/Treasurer, Principal - REI (since 2016) Vice President/Treasurer, PSI (since 2016) Vice President/Treasurer, PSS (since 2016)
Laura B. Latham 711 High Street Des Moines, IA 50392 1986	Assistant Counsel and Assistant Secretary (since 2018)	Counsel, PGI (since 2018) Prior thereto, Attorney in Private Practice
Diane K. Nelson 711 High Street Des Moines, IA 50392 1965	AML Officer (since 2016)	Chief Compliance Officer/AML Officer, PSS (since 2015) Compliance Advisor, PMC (2013-2015)

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Name, Address and Year of Birth	Position(s) Held with Trust and Length of Time Served	Positions with PGI and its Affiliates; Principal Occupations During Past 5 Years** (unless noted otherwise)
Sara L. Reece 711 High Street Des Moines, IA 50392 1975	Vice President and Controller (since 2016)	Director - Accounting, PLIC (since 2015) Assistant Financial Controller, PLIC (prior to 2015)
Teri R. Root 711 High Street Des Moines, IA 50392 1979	Chief Compliance Officer (since 2018) Interim Chief Compliance Officer (2018) Deputy Chief Compliance Officer (2015-2018)	Chief Compliance Officer - Funds, PFI (since 2018) Deputy Chief Compliance Officer, PGI (2017-2018) Vice President and Chief Compliance Officer, PMC (2015-2017) Vice President, PSS (since 2015)
Britney L. Schnathorst 711 High Street Des Moines, IA 50392 1981	Assistant Secretary (since 2017) Assistant Counsel (since 2014)	Counsel, PLIC (since 2013) Prior thereto, Attorney in Private Practice
Adam U. Shaikh 711 High Street Des Moines, IA 50392 1972	Assistant Counsel (since 2014)	Assistant General Counsel, PGI (2018) Counsel, PGI (2017-2018) Counsel, PLIC (since 2006) Counsel, PMC (2007-2013, 2014-2017)
Dan L. Westholm 711 High Street Des Moines, IA 50392 1966	Assistant Treasurer (since 2014)	Assistant Vice President/Treasurer, PGI (since 2017) Assistant Vice President/Treasury, PFA (since 2013) Assistant Vice President/Treasury, PFD (since 2013) Assistant Vice President/Treasury, PLIC (since 2014) Director-Treasury, PLIC (2007-2014) Assistant Vice President/Treasury, PMC (2013-2017) Assistant Vice President/Treasury, PSI (since 2013) Assistant Vice President/Treasury, PSS (since 2013)
Beth C. Wilson 711 High Street Des Moines, IA 50392 1956	Vice President and Secretary (since 2014)	Director and Secretary-Funds, PLIC
Clint L. Woods 711 High Street Des Moines, IA 50392 1961	Counsel, Vice President, and Assistant Secretary (since 2018) Of Counsel (2017-2018) Vice President (2016-2017) Counsel (2015-2017)	Vice President (since 2015) Associate General Counsel, Governance Officer, and Assistant Corporate Secretary, PLIC (since 2013)
Jared A. Yepsen 711 High Street Des Moines, IA 50392 1981	Assistant Tax Counsel (since 2017)	Counsel, PGI (since 2017) Counsel, PLIC (since 2015) Senior Attorney, TLIC (2013-2015)

**   Abbreviations used:

• Principal Financial Advisors, Inc. (PFA)

• Principal Funds Distributor, Inc. (PFD)

• Principal Global Investors, LLC (PGI)

• Principal Life Insurance Company (PLIC)

• Principal Management Corporation (PMC), now PGI

• Principal Real Estate Investors, LLC (Principal - REI)

• Principal Securities, Inc. (PSI)

• Principal Shareholder Services, Inc. (PSS)

• Transamerica Life Insurance Company (TLIC)

The following tables set forth the dollar range of the equity securities of Funds included in this SAI, and aggregate dollar range of the equity securities of the funds in the Fund Complex, that were beneficially owned by the Trustees as of December 31, 2017. As of that date, Directors did not own shares of the Funds included in this SAI that are not listed.

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For the purpose of these tables, beneficial ownership means a direct or indirect pecuniary interest. Only the Trustees who are "interested persons” are eligible to participate in an employee benefit program which invests in Principal Funds, Inc. Trustees who beneficially owned shares of the series of the Principal Variable Contracts Funds, Inc. did so through variable life insurance and variable annuity contracts. Please note that exact dollar amounts of securities held are not listed. Rather, ownership is listed based on the following dollar ranges:

A    $0

B    $1 up to and including $10,000

C    $10,001 up to and including $50,000

D    $50,001 up to and including $100,000

E    $100,001 or more

Independent Trustees (not Considered to be "Interested Persons")

ETF*	Ballantine	Barnes	Damos	Grimmett	Hirsch	Huang	McMillan	Nickels	VanDeWeghe**
Principal EDGE Active Income	A	A	A	C	A	A	A	A	A
Principal Millennials Index	A	A	A	A	A	A	D	A	A
Principal Sustainable Momentum Index	A	A	A	A	A	A	A	A	D
Principal U.S. Mega-Cap Multi-Factor Index	A	A	A	A	A	A	A	A	D
Total Fund Complex	E	E	E	E	E	E	E	E	E

* The Principal Investment Grade Corporate Active and Principal Ultra-Short Active Income ETFs were not in operation as of December 31, 2017.

** Trustee's appointment effective April 13, 2018. Ownership information as of May 9, 2018.

Trustees Considered to be "Interested Persons"

	Beer	Halter
ETFs in this SAI*	A	A
Total Fund Complex*	E	E

* The Principal Investment Grade Corporate Active and Principal Ultra-Short Active Income ETFs were not in operation as of December 31, 2017.

Compensation

The Trust does not pay any remuneration to its Trustees or officers who are employed by PGI or its affiliates. The Trust's Board annually considers a proposal to reimburse PGI for certain expenses, including a portion of the Chief Compliance Officer's compensation. If the proposal is adopted, these amounts are allocated across all Funds based on relative net assets of each portfolio.

Each Trustee who is not an “interested person” received compensation for service as a member of the Boards of all investment companies sponsored by Principal Life based on a schedule that takes into account an annual retainer amount, the number of meetings attended, and expenses incurred. Trustee compensation and related expenses are allocated to each Fund based on the net assets of each relative to combined net assets of all of the investment companies sponsored by Principal Life.

The following table provides information regarding the compensation received by the Independent Trustees from the Funds included in this SAI and from the Fund Complex during the period ended June 30, 2018. On that date, there were 3 Funds (with a total of 135 portfolios in the Fund Complex). The Funds do not provide retirement benefits or pensions to any of the Trustees.

Trustee	Funds in this SAI*	Fund Complex
Elizabeth Ballantine	$3,248	$269,000
Leroy Barnes	$3,532	$292,500
Craig Damos	$3,591	$298,000
Mark A. Grimmett	$3,894	$321,000
Fritz Hirsch	$3,617	$298,500
Tao Huang	$3,431	$283,500
Karen ("Karrie") McMillan	$3,332	$276,000
Elizabeth Nickels	$3,320	$275,000
Mary M. ("Meg") VanDeWeghe**	$2,001	$117,500

* The Principal Ultra-Short Active Income ETF was not in operation during the period ended June 30, 2018.

** Trustee's appointment effective April 13, 2018.

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INVESTMENT ADVISORY AND OTHER SERVICES

Investment Advisors

Principal Global Investors, LLC (“PGI”), an indirect subsidiary of Principal Financial Group, Inc. ("Principal^®"), serves as the manager and as a discretionary advisor for each Fund.

PGI has executed an agreement with a Sub-Advisor. Under the Sub-Advisory agreement, the Sub-Advisor agrees to assume the obligations of PGI to provide investment advisory services for a specific Fund. For these services, PGI pays the Sub-Advisor a fee.

Sub-Advisor: Spectrum Asset Management, Inc. ("Spectrum") is an indirect subsidiary of Principal Financial Group, Inc.

Fund: Principal Spectrum Preferred Securities Active ETF

Affiliated Persons of the Trust Who are Affiliated Persons of the Advisor

For information about affiliated persons of the Trust who are also affiliated persons of PGI or affiliated advisors, see the Interested Trustee and Officer tables in the “Leadership Structure and Board of Trustees” section.

Codes of Ethics

The Trust, PGI, and the Sub-Advisor have adopted Codes of Ethics (“Codes”) under Rule 17j-1 of the 1940 Act. PGI and the Sub-Advisor has each also adopted such a Code under Rule 204A-1 of the Investment Advisers Act of 1940. These Codes are designed to prevent, among other things, persons with access to information regarding the portfolio trading activity of the Funds from using that information for their personal benefit. Except in limited circumstances, the Code for PGI and the Fund prohibits portfolio managers from personally trading securities that are held or traded in the actively managed portfolios for which they are responsible. In certain circumstances, the Sub-Advisor’s Code permits personnel subject to the Code to invest in securities, including securities that may be purchased or held by the Fund. The Trust's Board reviews reports at least annually regarding the operation of the Code of Ethics of the Trust, PGI, and each Sub-Advisor. The Codes are on file with, and available from, the SEC. A copy of the Trust's Code will also be provided upon request, which may be made by contacting the Trust.

Management Agreement

For providing the investment advisory services, and specified other services, PGI, under the terms of the Management Agreement for the Trust, is entitled to receive a fee computed and accrued daily and payable monthly, at the following annual rates. The management fee schedule for each Fund is as follows (expressed as a percentage of average net assets):

Fund	First $500 Million	Next $500 Million	Next $500 Million	Over $1.5 Billion
Principal Healthcare Innovators Index ETF	0.42%	0.40%	0.38%	0.37%
Principal Millennials Index ETF	0.45%	0.43%	0.41%	0.40%
Principal Price Setters Index ETF	0.40%	0.38%	0.36%	0.35%
Principal Shareholder Yield Index ETF	0.40%	0.38%	0.36%	0.35%

Fund	All Assets
Principal Active Global Dividend Income ETF	0.58%
Principal Contrarian Value Index ETF	0.29%
Principal EDGE Active Income ETF	0.49%
Principal International Multi-Factor Index ETF	0.39%
Principal Investment Grade Corporate Active ETF	0.26%
Principal Spectrum Preferred Securities Active ETF	0.55%
Principal Sustainable Momentum Index ETF	0.29%
Principal Ultra-Short Active Income ETF	0.18%
Principal U.S. Mega-Cap Multi-Factor Index ETF	0.15%
Principal U.S. Small-Cap Multi-Factor Index ETF	0.38%

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Fund Operating Expenses

The Management Agreement between each Fund and PGI provides that PGI will pay all operating expenses of the Fund, except for the Management Fee, payments made under each Series 12b-1 plan, brokerage commissions and other expenses connected to the execution of portfolio transactions, interest expense, taxes, acquired fund fees and expenses, litigation expenses and other extraordinary expenses.

Contractual Limits on Total Annual Fund Operating Expenses

PGI has contractually agreed to limit certain Funds' expenses (excluding interest expense, expenses related to fund investments, acquired fund fees and expenses, and other extraordinary expenses). The reductions and management fee waivers/expense reimbursements are in amounts that maintain total operating expenses at or below certain limits. The limits are expressed as a percentage of average daily net assets on an annualized basis. The expenses borne by PGI are subject to reimbursement by the Funds through the fiscal year end, provided no reimbursement will be made if it would result in the Funds' exceeding the total operating expense limit. The operating expense limits and the agreement terms are as follows:

Contractual Limit on Total Annual Fund Operating Expenses
Fund	Limit	Expiration
Principal Price Setters Index ETF	0.29%	10/31/2019
Principal Shareholder Yield Index ETF	0.29%	10/31/2019
Principal U.S. Mega-Cap Multi-Factor Index ETF	0.12%	10/31/2019

Management Fees Paid

Fees paid for investment management services during the periods indicated were as follows:

Management Fees for Periods Ended June 30 (amounts in thousands)
	2018			2017			2016
Principal Active Global Dividend Income ETF	$	3,414		$	300	(1)	N/A
Principal Contrarian Value Index ETF	9		(2)	N/A			N/A
Principal EDGE Active Income ETF	1,955			2,088			268	(3)
Principal Healthcare Innovators Index ETF	154			23		(4)	N/A
Principal International Multi-Factor Index ETF	38		(5)	N/A			N/A
Principal Investment Grade Corporate Active ETF	80		(6)	N/A			N/A
Principal Millennials Index ETF	58			26		(4)	N/A
Principal Price Setters Index ETF	61			27			7	(7)
Principal Shareholder Yield Index ETF	42			27			7	(7)
Principal Spectrum Preferred Securities Active ETF	198		(8)	N/A			N/A
Principal Sustainable Momentum Index ETF	9		(2)	N/A			N/A
Principal Ultra-Short Active Income ETF	N/A		(9)	N/A			N/A
Principal U.S. Mega-Cap Multi-Factor Index ETF	1,235		(10)	N/A			N/A
Principal U.S. Small-Cap Multi-Factor Index ETF	1,215			681		(11)	N/A
(1) Period from May 9, 2017, date operations commenced, through June 30, 2017
(2) Period from October 18, 2017, date operations commenced, through June 30, 2018
(3) Period from July 8, 2015, date operations commenced, through June 30, 2016
(4) Period from August 19, 2016, date operations commenced, through June 30, 2017
(5) Period from November 8, 2017, date operations commenced, through June 30, 2018
(6) Period from April 18, 2018, date operations commenced, through June 30, 2018
(7) Period from March 21, 2016, date operations commenced, through June 30, 2016
(8) Period from July 7, 2017, date operations commenced, through June 30, 2018
(9) The Principal Ultra-Short Active Income ETF had not commenced operations prior to the end of the most recent fiscal year end.
(10) Period from October 11, 2017, date operations commenced, through June 30, 2018
(11) Period from September 21, 2016, date operations commenced, through June 30, 2017

Sub-Advisory Agreements

PGI (and not the Fund) pays the sub-advisor fees determined pursuant to a sub-advisory Agreement with the sub-advisor, including any sub-advisors that are at least 95% owned, directly or indirectly, by PGI or its affiliates. Fees paid to sub-advisors are individually negotiated between PGI and each sub-advisor and may vary.

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Distributor

ALPS Distributors, Inc. (the “Distributor”) is located at 1290 Broadway, Suite 1100, Denver, Colorado 80203. The Distributor is a broker-dealer registered under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and a member of the Financial Industry Regulatory Authority (“FINRA”).

Shares will be continuously offered for sale by the Trust through the Distributor only in whole Creation Units, as described in the section of this SAI entitled “Purchase and Redemption of Creation Units.” The Distributor also acts as an agent for the Trust with respect to the continuous distribution of Creation Units of the Funds. The Distributor will deliver a prospectus to APs purchasing Shares in Creation Units and will maintain records of both orders placed with it and confirmations of acceptance furnished by it. The Distributor has no role in determining the investment policies of the Funds or which securities are to be purchased or sold by the Funds.

The Board has adopted a Distribution and Service Plan pursuant to Rule 12b-1 under the 1940 Act. No Rule 12b-1 fees are currently paid by any of the Funds, and there are no plans to impose these fees. However, in accordance with its Rule 12b-1 plan, each Fund is authorized to pay an amount up to 0.25% of its average daily net assets each year to compensate the Distributor for providing certain services to the Fund, including activities primarily intended to result in the sale of Creation Units of the Fund or the provision of investor services. Under the plan, the Funds would have no legal obligation to pay any amount that exceeds the compensation limit. The Distributor would be entitled to retain any such fees without regard to the expenses which it incurs. In the event Rule 12b-1 fees are charged in the future, they will be paid out of the respective Fund’s assets, and over time, these fees will increase the cost of your investment and they may cost you more than certain other types of sales charges.

Fund Sub-Administrator, Custodian, and Transfer Agent

State Street Bank and Trust Company (the “Transfer Agent,” “Custodian,” or "State Street") serves as the Funds' sub-administrator, custodian and transfer agent. State Street is located at 100 Huntington Avenue, Copley Place CPH0255, Tower 1, Floor 2, Boston, MA 20116.

Under an Administration Agreement and an Accounting Services Agreement with PGI (on behalf of the Trust), State Street provides necessary administrative, treasury, and tax services, including financial reporting for the maintenance and operations of the Funds. In addition, State Street makes available the office space, equipment, personnel and facilities required to provide such services. State Street also provides fund accounting services and is responsible for maintaining the books and records and calculating the daily net asset value of the Funds. PGI is ultimately responsible for such services pursuant to a Management Agreement with the Trust.

Under the Custody Agreement with the Trust, State Street maintains in separate accounts cash, securities and other assets of the Trust and each Fund, keeps all necessary accounts and records, and provides other services. State Street is required, upon order of the Trust, to deliver securities held by State Street and to make payments for securities purchased by the Trust for each Fund. Under the Custody Agreement, State Street is also authorized to appoint certain foreign custodians or foreign custody managers for Fund investments outside the United States.

Pursuant to a Transfer Agency Services Agreement with the Trust, State Street acts as transfer agent to the Funds, dividend disbursing agent and shareholder servicing agent to the Funds.

For the fiscal year ended June 30, 2018, the Trust paid State Street a total of $1,347,782.81 for these services.

Brokerage on Purchases and Sales of Securities

All orders for the purchase or sale of portfolio securities are placed on behalf of a Fund by PGI, or by the Fund's Sub-Advisor pursuant to the terms of the applicable sub-advisory agreement. In distributing brokerage business arising out of the placement of orders for the purchase and sale of securities for any Fund, the objective of PGI and of each Fund's Sub-Advisor is to obtain the best overall terms. In pursuing this objective, PGI or the Sub-Advisor considers all matters it deems relevant, including the breadth of the market in the security, the price of the security, the financial condition and executing capability of the broker or dealer, confidentiality, including trade anonymity, and the reasonableness of the commission, if any (for the specific transaction and on a continuing basis). This may mean in some instances that PGI or the Sub-Advisor will pay broker commissions that are in excess of the amount of commissions another broker might have charged for executing the same transaction when PGI or the Sub-Advisor believes that such commissions are reasonable in light of a) the size and difficulty of the transaction, b) the quality of the execution provided, and c) the level of commissions paid relative to commissions paid by other institutional investors. Such factors are viewed both in terms of that particular transaction and in terms of all transactions that broker executes for accounts over which PGI or the Sub-Advisor exercises investment discretion. The Board has also adopted a policy and procedure designed to prevent each of the Funds from compensating a broker/dealer for promoting or selling Fund shares by directing brokerage transactions to that broker/dealer for the purpose of compensating the broker/dealer for promoting or selling Fund shares. Therefore, PGI or the Sub-Advisor may not compensate a broker/dealer for promoting or selling Fund shares by directing brokerage transactions to that

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broker/dealer for the purpose of compensating the broker/dealer for promoting or selling Fund shares. PGI or the Sub-Advisor may purchase securities in the over-the-counter market, utilizing the services of principal market makers unless better terms can be obtained by purchases through brokers or dealers, and may purchase securities listed on the NYSE from non-Exchange members in transactions off the Exchange.

PGI or the Sub-Advisor may give consideration in the allocation of business to services performed by a broker (e.g., the furnishing of statistical data and research generally consisting of, but not limited to, information of the following types: analyses and reports concerning issuers, industries, economic factors and trends, portfolio strategy, performance of client accounts, and access to research analysts, corporate management personnel, and industry experts). If any such allocation is made, the primary criteria used will be to obtain the best overall terms for such transactions or terms that are reasonable in relation to the research or brokerage services provided by the broker or dealer when viewed in terms of either a particular transaction or the Sub-Advisor’s overall responsibilities to the accounts under its management. PGI or the Sub-Advisor generally pays additional commission amounts for such research services. Statistical data and research information received from brokers or dealers as described above may be useful in varying degrees and PGI or a Sub-Advisor may use it in servicing some or all of the accounts it manages.

Subject to the rules promulgated by the SEC, as well as other regulatory requirements, the Board has approved procedures whereby the Funds may purchase securities that are offered in underwritings in which an affiliate of a Sub-Advisor, or PGI, participates. These procedures prohibit the Funds from directly or indirectly benefiting a Sub-Advisor or PGI affiliate in connection with such underwritings. In addition, for underwritings where a Sub-Advisor affiliate or PGI participates as a principal underwriter, certain restrictions may apply that could, among other things, limit the amount of securities that the Funds could purchase in the underwritings. The Sub-Advisor shall determine the amounts and proportions of orders allocated to the Sub-Advisor or affiliate. The Trustees will receive quarterly reports on these transactions.

The Board has approved procedures that permit the Funds to effect a purchase or sale transaction between the Fund and an affiliated investment company or between a Fund and affiliated persons of the Fund under limited circumstances prescribed by SEC rules. Any such transaction must be effected without any payment other than a cash payment for the securities, for which a market quotation is readily available, at the current market price; no brokerage commission or fee (except for customary transfer fees), or other remuneration may be paid in connection with the transaction. The Board receives quarterly reports of all such transactions.

The Board has also approved procedures that permit a Fund's Sub-Advisor(s) to place portfolio trades with an affiliated broker under circumstances prescribed by SEC Rules 17e-1 and 17a-10. The procedures require that total commissions, fees, or other remuneration received or to be received by an affiliated broker must be reasonable and fair compared to the commissions, fees or other remuneration received by other brokers in connection with comparable transactions involving similar securities being purchased or sold on a securities exchange during a comparable time period. The Board receives quarterly reports of all transactions completed pursuant to each Fund's procedures.

Purchases and sales of debt securities and money market instruments usually are principal transactions; portfolio securities are normally purchased directly from the issuer or from an underwriter or marketmakers for the securities. Such transactions are usually conducted on a net basis with a Fund paying no brokerage commissions. Purchases from underwriters include a commission or concession paid by the issuer to the underwriter, and the purchases from dealers serving as marketmakers include the spread between the bid and asked prices.

Commission rates a Sub-Advisor pays to brokers may vary and reflect such factors as the trading volume placed with a broker, the type of security, the market in which a security is traded and the trading volume of that security, the types of services provided by the broker (i.e. execution services only or additional research services) and the quality of a broker's execution.

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The following table shows the brokerage commissions paid during the periods indicated.

Total Brokerage Commissions Paid for Periods Ended June 30
Fund	2018			2017		2016
Principal Active Global Dividend Income ETF	$	206,167		N/A		N/A
Principal Contrarian Value Index ETF	930		(1)	N/A		N/A
Principal EDGE Active Income ETF	13,067			33,187		88,559	(2)
Principal Healthcare Innovators Index ETF	7,255			1,169	(3)	N/A
Principal International Multi-Factor Index ETF	4,008		(4)	N/A		N/A
Principal Millennials Index ETF	3,859			2,011	(3)	N/A
Principal Price Setters Index ETF	4,911			600		24	(5)
Principal Shareholder Yield Index ETF	3,047			945		139	(5)
Principal Sustainable Momentum Index ETF	2,367		(1)	N/A		N/A
Principal U.S. Mega-Cap Multi-Factor Index ETF	138,564		(6)	N/A		N/A
Principal U.S. Small-Cap Multi-Factor Index ETF	170,353			30,673	(7)	N/A

(1)	Period from October 18, 2017, date operations commenced, through June 30, 2018
(2)	Period from July 8, 2015, date operations commenced, through June 30, 2016
(3)	Period from August 19, 2016, date operations commenced, through June 30, 2017
(4)	Period from November 8, 2017, date operations commenced, through June 30, 2018
(5)	Period from March 21, 2016, date operations commenced, through June 30, 2016
(6)	Period from October 11, 2017, date operations commenced, through June 30, 2018
(7)	Period from September 21, 2016, date operations commenced, through June 30, 2017

The primary reasons for changes in some of the ETFs' brokerage commissions for the three years were changes in ETF size and changes in market conditions which required substantial portfolio restructurings, resulting in increased securities transactions and brokerage commissions.

Brokerage commissions from the portfolio transactions effected for the Funds were paid to brokers affiliated with PGI or the Sub-Advisors for the fiscal years ended June 30 as follows:

Fund	Sub-Advisor Employed by the Fund Complex	Affiliated Broker	2018 Fund's Total Commissions Paid		% of Fund's Total Commissions		% of Dollar Amount of Fund's Commissionable Transactions
Principal Active Global Dividend Income ETF
	AllianceBernstein L.P.	Sanford C Bernstein Co., LLC	$	855	0.41	%	1.05	%
	Credit Suisse Asset Management, LLC	Credit Suisse Securities (USA), LLC	3,568		1.73		2.33
	Macquarie Capital Investment Management LLC	Macquarie Securities Limited	9,824		4.77		3.39
	Mellon Capital Management Corporation	Pershing Securities Limited	11,117		5.39		5.87
Total			$	25,364	12.30	%	12.64	%
Principal Contrarian Value Index ETF
	AllianceBernstein L.P.	Sanford C Bernstein Co., LLC	$	2	0.20	%	0.25	%
	Credit Suisse Asset Management, LLC	Credit Suisse Securities (USA), LLC	3		0.36		0.15
	Macquarie Capital Investment Management LLC	Macquarie Securities Limited	54		5.76		7.30
	Mellon Capital Management Corporation	Pershing Securities Limited	12		1.32		1.67
Total			$	71	7.64	%	9.37	%
Principal EDGE Active Income ETF
	Credit Suisse Asset Management, LLC	Credit Suisse Securities (USA), LLC	$	107	0.82	%	0.78	%
	Mellon Capital Management Corporation	Pershing Securities Limited	196		1.50		0.66
Total			$	303	2.32	%	1.44	%
Principal Healthcare Innovators Index ETF
	AllianceBernstein L.P.	Sanford C Bernstein Co., LLC	$	64	0.88	%	0.64	%
Total			$	64	0.88	%	0.64	%

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Fund	Sub-Advisor Employed by the Fund Complex	Affiliated Broker	2018 Fund's Total Commissions Paid		% of Fund's Total Commissions		% of Dollar Amount of Fund's Commissionable Transactions
Principal International Multi-Factor Index ETF
	AllianceBernstein L.P.	Sanford C Bernstein Co., LLC	$	1	0.02	%	0.02	%
	Credit Suisse Asset Management, LLC	Credit Suisse Securities (USA), LLC	19		0.48		0.35
Total			$	20	0.50	%	0.37	%
Principal Millennials Index ETF
	AllianceBernstein L.P.	Sanford C Bernstein Co., LLC	$	20	0.51	%	0.91	%
	Credit Suisse Asset Management, LLC	Credit Suisse Securities (USA), LLC	33		0.87		1.77
	Macquarie Capital Investment Management LLC	Macquarie Securities Limited	2		0.06		0.05
	Mellon Capital Management Corporation	Pershing Securities Limited	—		0.01		0.01
Total			$	55	1.45	%	2.74	%
Principal Price Setters Index ETF
	AllianceBernstein L.P.	Sanford C Bernstein Co., LLC	$	27	0.55	%	1.06	%
	Credit Suisse Asset Management, LLC	Credit Suisse Securities (USA), LLC	10		0.20		0.09
	Macquarie Capital Investment Management LLC	Macquarie Securities Limited	14		0.28		0.34
	Mellon Capital Management Corporation	Pershing Securities Limited	4		0.07		0.06
Total			$	55	1.10	%	1.55	%
Principal Shareholder Yield index ETF
	AllianceBernstein L.P.	Sanford C Bernstein Co., LLC	$	—	—	%	0.01	%
	Credit Suisse Asset Management, LLC	Credit Suisse Securities (USA), LLC	7		0.23		0.10
	Macquarie Capital Investment Management LLC	Macquarie Securities Limited	37		1.21		1.53
	Mellon Capital Management Corporation	Pershing Securities Limited	16		0.53		0.25
Total			$	60	1.97	%	1.89	%
Principal Sustainable Momentum Index ETF
	Credit Suisse Asset Management, LLC	Credit Suisse Securities (USA), LLC	$	—	—	%	0.01	%
	Macquarie Capital Investment Management LLC	Macquarie Securities Limited	149		6.31		7.41
Total			$	149	6.31	%	7.42	%
Principal U.S. Mega-Cap Multi-Factor Index ETF
	Mellon Capital Management Corporation	Pershing Securities Limited	$	460	0.33	%	0.30	%
Total			$	460	0.33	%	0.30	%
Principal U.S. Small-Cap Multi-Factor Index ETF
	AllianceBernstein L.P.	Sanford C Bernstein Co., LLC	$	1,132	0.66	%	0.52	%
	Mellon Capital Management Corporation	Pershing Securities Limited	375		0.22		0.05
Total			$	1,507	0.88	%	0.57	%

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Fund	Sub-Advisor Employed by the Fund Complex	Affiliated Broker	2017 Fund's Total Commissions Paid		% of Fund's Total Commissions		% of Dollar Amount of Fund's Commissionable Transactions
Principal EDGE Active Income ETF
	Credit Suisse Asset Management, LLC	Credit Suisse Securities (USA), LLC	$	2,931	8.83	%	9.52	%
	J.P. Morgan Investment Management, Inc.	J.P. Morgan Clearing Corp	129		0.39		1.31
	Mellon Capital Management Corporation	Pershing LLC	547		1.65		1.37
	AllianceBernstein L.P.	Sanford C. Bernstein & Co., LLC	861		2.59		2.70
	Analytic Investors, LLC	Wells Fargo Securities, LLC	5,589		16.84		13.58
Total			$	10,057	30.30	%	28.48	%
Principal Healthcare Innovators Index ETF
	Credit Suisse Asset Management, LLC	Credit Suisse Securities (USA), LLC	$	2	0.15	%	0.32	%
	J.P. Morgan Investment Management, Inc.	J.P. Morgan Clearing Corp	100		8.60		10.27
	Mellon Capital Management Corporation	Pershing LLC	1		0.08		0.03
Total			$	103	8.83	%	10.62	%
Principal Millennials Index ETF
	Credit Suisse Asset Management, LLC	Credit Suisse Securities (Europe), LLC	$	361	17.97	%	16.33	%
	Credit Suisse Asset Management, LLC	Credit Suisse Securities (USA), LLC	2		0.09		0.05
	American Century Investment Management, Inc.	Instinet U.K. LTD	20		1.01		0.28
	J.P. Morgan Investment Management, Inc.	J.P. Morgan Clearing Corp	576		28.63		45.40
	J.P. Morgan Investment Management, Inc.	J.P. Morgan Securities Australia LTD	1		0.03		0.01
	J.P. Morgan Investment Management, Inc.	J.P. Morgan Securities PLC	1		0.04		0.02
	J.P. Morgan Investment Management, Inc.	J.P. Morgan Securities (Asia Pacific) LTD	7		0.37		0.14
	Macquarie Capital Investment Management LLC	Macquarie Bank Limited	18		0.90		0.49
	AllianceBernstein L.P.	Sanford C. Bernstein & Co., LLC	36		1.80		1.28
Total			$	1,022	50.84	%	64.00	%
Principal Price Setters Index ETF
	Credit Suisse Asset Management, LLC	Credit Suisse Securities (USA), LLC	$	8	1.39	%	0.65	%
	J.P. Morgan Investment Management, Inc.	J.P. Morgan Clearing Corp	18		3.03		3.70
	Mellon Capital Management Corporation	Pershing LLC	7		1.24		0.48
Total			$	33	5.66	%	4.83	%
Principal Shareholder Yield index ETF
	Credit Suisse Asset Management, LLC	Credit Suisse Securities (USA), LLC	$	22	2.29	%	1.22	%
	J.P. Morgan Investment Management, Inc.	J.P. Morgan Clearing Corp	25		2.60		4.11
	Mellon Capital Management Corporation	Pershing LLC	9		0.93		0.28
Total			$	56	5.82	%	5.61	%
Principal U.S. Small-Cap Multi-Factor Index ETF
	J.P. Morgan Investment Management, Inc.	J.P. Morgan Clearing Corp	$	604	1.97	%	2.54	%
	Macquarie Capital Investment Management LLC	Macquarie Capital (USA) Inc.	678		2.21		1.96
	AllianceBernstein L.P.	Sanford C. Bernstein & Co., LLC	371		1.21		1.96
Total			$	1,653	5.39	%	6.46	%

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Fund	Sub-Advisor Employed by the Fund Complex	Affiliated Broker	2016 Fund's Total Commissions Paid		% of Fund's Total Commissions		% of Dollar Amount of Fund's Commissionable Transactions
Principal EDGE Active Income ETF
	Mellon Capital Management Corporation	ConvergEx Execution Solutions, LLC	$	44	0.05	%	0.08	%
	Credit Suisse Asset Management, LLC	Credit Suisse Securities (USA), LLC	1,770		2.00		2.55
	J.P. Morgan Investment Management, Inc.	J.P. Morgan Clearing Corporation	2,979		3.36		0.55
	Macquarie Capital Investment Management LLC	Macquarie Capital (USA) Inc	10,494		11.85		14.06
	Mellon Capital Management Corporation	Pershing LLC	596		0.67		0.21
Total			$	15,883	17.93	%	17.45	%
Principal Shareholder Yield Index ETF
	Mellon Capital Management Corporation	Pershing LLC	$	5	3.44	%	1.90	%
Total			$	5	3.44	%	1.90	%

Material differences, if any, between the percentage of an ETF’s brokerage commissions paid to a broker and the percentage of transactions effected through that broker reflect the commission rates the Advisor or Sub-Advisor has negotiated with the broker. Commission rates an Advisor or Sub-Advisor pays to brokers may vary and reflect such factors as the trading volume placed with a broker, the type of security, the market in which a security is traded and the trading volume of that security, the types of services provided by the broker (i.e. execution services only or additional research services) and the quality of a broker's execution.

The following table indicates the value of each Fund's aggregate holdings, in thousands, of the securities of its regular brokers or dealers for the fiscal year ended June 30, 2018.

Holdings of Securities of Principal Exchange-Traded Funds Regular Brokers and Dealers
Principal Active Global Dividend Income ETF	JP Morgan Chase & Co.	$13,775
Principal Contrarian Value Index ETF	CITIGroup	16
	Jefferies Financial Group	23
	JP Morgan Chase & Co.	4
	Morgan Stanley	10
Principal EDGE Active Income ETF	CITIGroup	1,944
	Goldman Sachs Group, Inc.	998
	Jefferies Group LLC	3,076
	JP Morgan Chase & Co.	10,926
	Merrill Lynch	389
	Morgan Stanley	1,659
Principal Investment Grade Corporate Active ETF	CITIGroup	4,395
	Credit Suisse Group	881
	Goldman Sachs Group, Inc.	4,935
	JP Morgan Chase & Co.	3,297
	Morgan Stanley	8,089
	UBS Group	2,002
Principal Shareholder Yield Index ETF	CITIGroup	65
Principal Spectrum Preferred Securities Active ETF	CITIGroup	1,127
	Goldman Sachs Group, Inc.	1,679
	JP Morgan Chase & Co.	1,196
	Morgan Stanley	1,134
Principal Sustainable Momentum Index ETF	JP Morgan Chase & Co.	27
Principal U.S. Mega-Cap Multi-Factor Index ETF	CITIGroup	30,158
	JP Morgan Chase & Co.	28,827
	Morgan Stanley	26,561

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Conflicts of Interest and Allocation of Trades

By the Manager (PGI). PGI has its own trading platform and personnel that perform trade-related functions. Where applicable, PGI trades on behalf of its own clients. Such transactions are executed in accordance with PGI's trading policies and procedures, including, but not limited to trade allocations and order aggregation, purchase of new issues, and directed brokerage. PGI acts as discretionary investment adviser for a variety of individual accounts, ERISA accounts, mutual funds, insurance company separate accounts, and public employee retirement plans and places orders to trade portfolio securities for each of these accounts. Managing multiple accounts may give rise to potential conflicts of interest including, for example, conflicts among investment strategies and conflicts in the allocation of investment opportunities. PGI has adopted and implemented policies and procedures that it believes address the potential conflicts associated with managing accounts for multiple clients and are designed to ensure that all clients are treated fairly and equitably. These procedures include allocation policies and procedures and internal review processes.

If, in carrying out the investment objectives of its respective clients, occasions arise in which PGI deems it advisable to purchase or sell the same equity securities for two or more client accounts at the same or approximately the same time, PGI may submit the orders to purchase or sell to a broker/dealer for execution on an aggregate or "bunched" basis. PGI will not aggregate orders unless it believes that aggregation is consistent with (1) its duty to seek best execution and (2) the terms of its investment advisory agreements. In distributing the securities purchased or the proceeds of sale to the client accounts participating in a bunched trade, no advisory account will be favored over any other account and each account that participates in an aggregated order will participate at the average share price for all transactions of PGI relating to that aggregated order on a given business day, with all transaction costs relating to that aggregated order shared on a pro rata basis.

Because of PGI's role as investment advisor to each of the Funds and discretionary advisor to funds of funds and some underlying funds, conflicts may arise in connection with the services PGI provides to funds of funds with respect to asset class and target weights for each asset class and investments made in underlying funds. Conflicts may arise in connection with the services PGI provides to the funds of funds that it manages, in connection with the services PGI provides to other funds of funds, because PGI serves as the investment adviser to the underlying mutual funds in which the funds of funds invest, sometimes as the discretionary advisor, and an affiliated investment adviser may serve as sub-adviser to the mutual funds in which a fund of funds may invest. This raises a potential conflict because PGI's or an affiliated company's profit margin may vary depending upon the underlying fund in which the funds of funds invest.

PGI implements the following in an effort to limit the appearance of conflicts of interest and the opportunity for events that could trigger an actual conflict of interest:

• PGI’s uses a process to select subadvisors that emphasizes the selection of Principal-affiliated subadvisors that are determined to be qualified under the Manager’s due diligence process. However, PGI will select an unaffiliated subadvisor to manage all or a portion of a Fund’s portfolio when deemed necessary or appropriate based upon a consideration of the Fund’s objective and investment strategies and available expertise and resources within the Principal organization.

• PGI reminds its investment personnel who provide services to the funds of funds of PGI’s inherent conflicts of interest, and PGI’s duties of loyalty and care as a fiduciary, and obtains a quarterly written affirmation from each portfolio manager that he/she has employed the applicable methodology in good faith in making investment decisions during the preceding quarter.

Additionally, each Fund's portfolio managers manage a number of accounts other than the applicable Fund's portfolio, including in some instances proprietary or personal accounts. Managing multiple accounts may give rise to potential conflicts of interest including, for example, conflicts among investment strategies, allocating time and attention to account management, allocation of investment opportunities, knowledge of and timing of fund trades, selection of brokers and dealers, and compensation for the account. PGI has adopted and implemented policies and procedures that it believes address the potential conflicts associated with managing accounts for multiple clients and personal accounts and are designed to ensure that all clients and client accounts are treated fairly and equitably. These procedures include allocation policies and procedures, personal trading policies and procedures, internal review processes and, in some cases, review by independent third parties.

Investments that PGI and its portfolio managers deem appropriate for a Fund's portfolio may also be deemed appropriate by it for other accounts. Therefore, the same security may be purchased or sold at or about the same time for both a Fund's portfolio and other accounts. In such circumstances, PGI may determine that orders for the purchase or sale of the same security for a Fund's portfolio and one or more other accounts should be combined. In this event the transactions will be priced and allocated in a manner deemed by PGI to be equitable and in the best

50

interests of a Fund’s portfolio and such other accounts. While in some instances combined orders could adversely affect the price or volume of a security, the Trust believes that its participation in such transactions on balance will produce better overall results for the Funds.

By the Sub-Advisor(s). The portfolio managers of the Sub-Advisor(s) manage a number of accounts other than the Fund's portfolios, including in some instances proprietary or personal accounts. Managing multiple accounts may give rise to potential conflicts of interest including, for example, conflicts among investment strategies, allocating time and attention to account management, allocation of investment opportunities, knowledge of and timing of fund trades, selection of brokers and dealers, and compensation for the account. Each has adopted and implemented policies and procedures that it believes address the potential conflicts associated with managing accounts for multiple clients and personal accounts and are designed to ensure that all clients and client accounts are treated fairly and equitably. These procedures include allocation policies and procedures, personal trading policies and procedures, internal review processes and, in some cases, review by independent third parties.

Investments the Sub-Advisor(s) deem appropriate for the Fund's portfolio may also be deemed appropriate by it for other accounts. Therefore, the same security may be purchased or sold at or about the same time for both the Fund's portfolio and other accounts. In such circumstances, the Sub-Advisor(s) may determine that orders for the purchase or sale of the same security for the Fund's portfolio and one or more other accounts should be combined. In this event the transactions will be priced and allocated in a manner deemed by the Sub-Advisor(s) to be equitable and in the best interests of the Fund’s portfolio and such other accounts. While in some instances combined orders could adversely affect the price or volume of a security, the Fund believes that its participation in such transactions on balance will produce better overall results for the Fund.

INTERMEDIARY COMPENSATION

Shares of the Funds are sold primarily through intermediaries, such as brokers, dealers, investment advisors, banks, trust companies, pension plan consultants, retirement plan administrators and insurance companies.

As mentioned in the Prospectus, in the event 12b-1 fees are paid by the Funds to the Distributor in the future, the Distributor may pay some or all of those fees to intermediaries.

Additional Payments to Intermediaries

In addition, PGI and its affiliates may, out of their own resources, pay amounts to intermediaries that support the distribution or marketing of shares of the Funds or provide services to Fund shareholders. The making of these payments could create a conflict of interest for a financial intermediary receiving such payments. These payments may be made from profits received by PGI from the management fees paid to PGI by the Funds.

Numerous factors may be considered in determining the amount of such additional payments, including, but not limited to, the intermediary’s Fund sales and assets, and the willingness and ability of the intermediary to give the Distributor access to its Financial Professionals for educational and marketing purposes. Some such arrangements may include an agreed upon minimum or maximum payment.

As of March 19, 2019, PGI anticipates that the firms that will receive additional payments as described above include, but are not necessarily limited to, the following:

• Kestra Investment Services

• Morgan Stanley

• Raymond James

• TD Ameritrade

The preceding list is subject to change at any time without notice. Any additions, modifications, or deletions to the

financial intermediaries identified in this list that have occurred since March 19, 2019 are not reflected.

Ask your Financial Professional or visit your intermediary’s website for more information about the amounts paid to them by PGI and its affiliates, and by sponsors of other investment companies your Financial Professional may recommend to you.

PURCHASE AND REDEMPTION OF CREATION UNITS

Book-Entry Only System

The Depository Trust Company (DTC) acts as securities depository for the shares. Shares of the Funds are represented by securities registered in the name of DTC or its nominee and deposited with, or on behalf of, DTC. Certificates will not be issued for shares.

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DTC, a limited-purpose trust company, was created to hold securities of its participants and to facilitate the clearance and settlement of securities transactions among DTC participants in such securities through electronic book-entry changes in accounts of the DTC participants, thereby eliminating the need for physical movement of securities certificates. DTC participants include securities brokers and dealers, banks, trust companies, clearing corporations, and certain other organizations, some of whom (and/or their representatives) own DTC. Access to the DTC system is also available to others such as banks, brokers, dealers, and trust companies that clear through or maintain a custodial relationship with a DTC participant, either directly or indirectly.

Beneficial ownership of shares is limited to DTC participants and persons holding interests through DTC participants. Ownership of beneficial interests in shares (owners of beneficial interests are referred to herein as Beneficial Owners) is shown on, and the transfer of ownership is effected only through, records maintained by DTC (with respect to DTC participants) and on the records of DTC participants (with respect to indirect DTC participants and Beneficial Owners that are not DTC participants). Beneficial Owners will receive from or through a DTC participant a written confirmation relating to their purchase of shares.

Conveyance of all notices, statements and other communications to Beneficial Owners is effected as follows. Pursuant to the Depositary Agreement between the Trust and DTC, DTC is required to make available to the Trust upon request and for a fee to be charged to the trust a listing of the shares of the fund held by each DTC participant. The Trust shall inquire of each such DTC participant as to the number of Beneficial Owners holding fund shares, directly or indirectly, through such DTC participant. The Trust shall provide each such DTC participant with copies of such notice, statement or other communication, in such form, number and at such place as such DTC participant may reasonably request, so that such notice, statement or communication may be transmitted by such DTC participant, directly or indirectly, to such Beneficial Owners. In addition, the Trust shall pay to each such DTC participant a fair and reasonable amount as reimbursement for the expenses attendant to such transmittal, all subject to applicable statutory and regulatory requirements.

Share distributions shall be made to DTC or its nominee, Cede & Co., as the registered holder of all shares. DTC or its nominee, upon receipt of any such distributions, shall credit immediately DTC participants' accounts with payments in amounts proportionate to their respective beneficial interests in shares of the fund as shown on the records of DTC or its nominee. Payments by DTC participants to indirect DTC participants and Beneficial Owners of shares held through such DTC participants will be governed by standing instructions and customary practices, as is now the case with securities held for the accounts of customers in bearer form or registered in a "street name," and will be the responsibility of such DTC participants.

The Trust has no responsibility or liability for any aspect of the records relating to or notices to Beneficial Owners, or payments made on account of beneficial ownership interests in such shares, or for maintaining, supervising or reviewing any records relating to such beneficial ownership interests, or for any other aspect of the relationship between DTC and the DTC participants or the relationship between such DTC participants and the indirect DTC participants and Beneficial Owners owning through such DTC participants.

DTC may decide to discontinue providing its service with respect to shares at any time by giving reasonable notice to the trust and discharging its responsibilities with respect thereto under applicable law. Under such circumstances, the trust shall take action either to find a replacement for DTC to perform its functions at a comparable cost or, if such a replacement is unavailable, to issue and deliver printed certificates representing ownership of shares, unless the trust makes other arrangements with respect thereto satisfactory to the Exchange.

Creation Units

The Funds sell, issue and redeem through the Distributor, Shares in Creation Units on a continuous basis, without a sales load, at the NAV next determined after receipt of an order in proper form on any Business Day. As of the date of this SAI, the NYSE observes the following holidays: New Year’s Day, Martin Luther King, Jr. Day, Presidents’ Day, Good Friday, Memorial Day, Independence Day, Labor Day, Thanksgiving Day and Christmas Day. The Funds will not issue fractional Creation Units. Shares of the Funds will only be issued against full payment, as further described in the prospectus and this SAI.

A Creation Unit is an aggregation of 50,000 Shares. The Board may declare a split or a consolidation in the number of Shares outstanding of the Funds or Trust, and make a corresponding change in the number of Shares in a Creation Unit.

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To purchase or redeem any Creation Units from a Fund, you must be, or transact through, an authorized participant (“AP”). To be an AP, you must be either a broker-dealer or other participant (“Participating Party”) in the Continuous Net Settlement System (“Clearing Process”) of the National Securities Clearing Corporation (“NSCC”) or a participant in DTC with access to the DTC system (“DTC Participant”), and you must execute an agreement (“Participant Agreement”) with the Distributor, which must be accepted by the Transfer Agent, that governs transactions in the Fund’s Creation Units.

Transactions by an AP that is a Participating Party using the NSCC system are referred to as transactions “through the Clearing Process.” Transactions by an AP that is a DTC Participant using the DTC system are referred to as transactions “outside the Clearing Process.”

Investors who are not APs but want to transact in Creation Units may contact the Distributor for the names of APs. An AP may require investors to enter into a separate agreement to transact through it for Creation Units and may require orders for purchases of shares placed with it to be in a particular form. Investors should be aware that their broker may not be an AP and, therefore, may need to place any order to purchase or redeem Creation Units through another broker or person that is an AP, which may result in additional charges. There are expected to be a limited number of APs at any one time.

Orders must be transmitted by an AP by electronic order entry system, telephone, electronic mail, or other transmission method acceptable to the Distributor pursuant to procedures set forth in the Participant Agreement. Market disruptions and telephone or other communication failures may impede the transmission of orders.

Purchasing Creation Units

Fund Deposit

The consideration for a Creation Unit of a Fund is the Fund Deposit. The Fund Deposit will consist of the In-Kind Creation Basket and Cash Component, or an all cash payment (“Cash Value”), as determined by PGI to be permitted or required by a Fund. Short portions in a Fund’s portfolio and any other financial instruments thatcannot be transferred in-kind, will be represented by cash in the Cash Component and not in the In-Kind Creation Basket.

The Cash Component will typically include a “Balancing Amount” reflecting the difference, if any, between the NAV of a Creation Unit and the market value of the securities in the In-Kind Creation Basket. If the NAV per Creation Unit exceeds the market value of the securities in the In-Kind Creation Basket, the purchaser pays the Balancing Amount to the Fund. By contrast, if the NAV per Creation Unit is less than the market value of the securities in the In-Kind Creation Basket, the Fund pays the Balancing Amount to the purchaser. The Balancing Amount ensures that the consideration paid by an investor for a Creation Unit is exactly equal to the value of the Creation Unit.

PGI, in a portfolio composition file sent via the NSCC, generally makes available on each Business Day, immediately prior to the opening of business on the Exchange (currently 9:30 a.m., Eastern Time), a list of the names and the required number of shares of each security in the In-Kind Creation Basket to be included in the current Fund Deposit for the Fund (based on information about the Fund’s portfolio at the end of the previous Business Day subject to correction). If applicable, PGI, through the NSCC, also makes available on each Business Day, the estimated Cash Component or Cash Value, effective through and including the previous Business Day, per Creation Unit.

The announced Fund Deposit is applicable, subject to any adjustments as described below, for purchases of Creation Units of a Fund until the next-announced Fund Deposit is made available. From day to day, the composition of the In-Kind Creation Basket may change as, among other things, corporate actions and investment decisions by the Advisor are implemented for the Fund’s portfolio. All questions as to the composition of the In-Kind Creation Basket and the validity, form, eligibility, and acceptance for deposit of any securities shall be determined by the Fund, and the Fund’s determination shall be final and binding. Each Fund reserves the right to accept a nonconforming (i.e., custom) Fund Deposit. Payment of any stamp duty or the like shall be the sole responsibility of the AP purchasing a Creation Unit. The AP must ensure that all Deposit Securities properly denote change in beneficial ownership.

Cash in lieu

Each Fund may, in its sole discretion, permit or require the substitution of an amount of cash (“cash in lieu”) to be added to the Cash Component to replace any security in the In-Kind Creation Basket. Circumstances in which the Funds may permit or require cash in lieu include, without limitation:

• when the Fund announces before the open of trading that all purchases, all redemptions or all purchases and redemptions on that day will be made entirely in cash;

• when the securities in the In-Kind Creation Basket may not be available in sufficient quantity for delivery or may not be eligible for transfer through the systems of DTC or the Clearing Process; and

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• when the AP or its underlying investor is restricted under U.S. or local securities laws or policies from transacting in one or more securities in the In-Kind Creation Basket.

Each Fund will comply with the federal securities laws in accepting securities in the In-Kind Creation Basket, including the securities in the In-Kind Creation Basket that are sold in transactions that would be exempt from registration under the 1933 Act.

Each Fund expects to purchase the securities represented by the cash in lieu amount in the secondary market (“Market Purchases”). PGI may charge a higher transaction fee on the cash amount contributed in lieu of securities, which is intended in part to cover all or a portion of any difference between the market value at which the securities were purchased by the Fund and the cash in lieu amount.

Order Cut-Off Time

For an order involving a Creation Unit to be effectuated at a Fund’s NAV on a particular day, it must be received by the Distributor by or before the deadline for such order (“Order Cut-Off Time”) in accordance with the procedures set forth in the Participant Agreement. The Order Cut-Off Time for creation and redemption orders for a Fund is generally expected to be 4:00 p.m. Eastern Time for In-Kind Creation and Redemption Baskets, and 2:00 p.m. Eastern Time for Cash Value transactions. Accordingly, In-Kind Creation and Redemption Baskets are expected to be accepted until the close of regular trading on the Exchange on each Business Day, which is usually 4:00 p.m. Eastern Time. On days when the Exchange or bond markets close earlier than normal (such as the day before a holiday), the Order Cut-Off Time is expected to track the Exchange or bond markets closing and be similarly earlier than normal.

For select International Funds, next day (also known as T-1 or T minus one) international market orders are to be

placed after the listing exchange closing time and before the Fund’s established T-1 order window cut-off time, the

latest being 5:30 PM Eastern Standard Time on any Business Day. Such orders, if accepted, will receive the next

Business Day’s NAV per Creation Unit.

Custom orders typically clear outside the Clearing Process and, therefore, like other orders outside the Clearing Process, may need to be transmitted early on the relevant Business Day to be effectuated at that day’s NAV. A custom order may be placed when, for example, an AP cannot transact in a security in the In-Kind Creation or Redemption Basket and additional cash is included in the Fund Deposit or Fund Redemption in lieu of such security. Custom orders may be required to be received by the Distributor by 3:00 p.m. Eastern Time to be effectuated based on the Fund’s NAV on that Business Day.

In all cases, cash and securities should be transferred to the Fund by the “Settlement Date,” which is generally the Business Day immediately following the Business Day the order is placed (“Transmittal Date”) for cash and the second Business Day following the Transmittal Date for securities. Persons placing custom orders or orders involving Cash Value should be aware of time deadlines imposed by intermediaries, such as DTC and/or the Federal Reserve Bank wire system, which may delay the delivery of cash and securities by the Settlement Date.

Placement of Creation Orders

All purchase orders must be placed by or through an AP. To order a Creation Unit, an AP must submit an irrevocable purchase order to the Distributor in accordance with the procedures set forth in the Participant Agreement. In-kind (portions of) purchase orders will be processed through the Clearing Process when it is available. The Clearing Process is an enhanced clearing process that is available only for certain securities and only to DTC Participants that are also participants in the Clearing Process of the NSCC. In-kind (portions of) purchase orders not subject to the Clearing Process will go through a manual clearing process run by DTC. Fund Deposits that include government securities must be delivered through the Federal Reserve Bank wire transfer system (“Federal Reserve System”). Fund Deposits that include cash may be delivered through the Clearing Process or the Federal Reserve System. Certain orders for a Fund may be made outside the Clearing Process. In-kind deposits of securities for such orders must be delivered through the Federal Reserve System (for government securities) or through DTC (for corporate securities).

Orders Using Clearing Process

In connection with creation orders made through the Clearing Process, the Distributor transmits, on behalf of the AP, such trade instructions as are necessary to effect the creation order. Pursuant to such trade instructions, the AP agrees to deliver the requisite Fund Deposit to the Trust, together with such additional information as may be required by the Distributor and the Transfer Agent. An order to create Creation Units through the Clearing Process is deemed received by the Distributor and the Transfer Agent on the Transmittal Date if (i) such order is received by the Distributor by the order Cut-Off Time on such Transmittal Date and (ii) all other procedures set forth in the Participant Agreement are properly followed. Cash Components will be delivered using either the Clearing Process or the Federal Reserve System, as described below.

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Orders Outside Clearing Process

Fund Deposits made outside the Clearing Process must state that the DTC Participant is not using the Clearing Process and that the creation of Creation Units will instead be effected through a transfer of securities and cash directly through DTC. With respect to such orders, the Fund Deposit transfer must be ordered by the DTC Participant on the Transmittal Date in a timely fashion so as to ensure the delivery of the requisite number of securities in the In- Kind Creation Basket (whether standard or custom) through DTC to the relevant Trust account by 11:00 a.m., Eastern Time, (the “DTC Cut-Off Time”) on the Business Day immediately following the Transmittal Date. The amount of cash equal to the Cash Component, along with any cash in lieu and Transaction Fee, must be transferred directly to the Custodian through the Federal Reserve Bank wire transfer system in a timely manner so as to be received by the Custodian no later than 12:00 p.m., Eastern Time, on the Business Day immediately following the Transmittal Date. The delivery of corporate securities through DTC must occur by 3:00 p.m., Eastern Time, on the Business Day immediately following the Transmittal Date. The delivery of government securities through the Federal Reserve System must occur by 3:00 p.m., Eastern Time, on the Business Day immediately following the Transmittal Date.

An order to create Creation Units outside the Clearing Process is deemed received by the Distributor on the Transmittal Date if (i) such order is received by the Distributor by the Order Cut-Off Time on such Transmittal Date and (ii) all other procedures set forth in the Participant Agreement are properly followed. If the Custodian does not receive both the required In-Kind Creation Basket by the DTC Cut-Off Time and the Cash Component by the appointed time, such order may be canceled. Upon written notice to the Distributor and the Transfer Agent, a canceled order may be resubmitted the following Business Day using a Fund Deposit as newly constituted to reflect the then-current In-Kind Creation Basket and Cash Component. Except as provided in the Participant Agreement and subject to Foreign Market Holidays (See Appendix B for a list of Foreign Market Holidays), the delivery of Creation Units so created will occur no later than the second Business Day following the day on which the order is deemed received by the Distributor. APs that submit a canceled order will be liable to the Funds for any losses resulting therefrom.

Orders involving foreign securities are expected to be settled outside the Clearing Process. Thus, upon receipt of an irrevocable purchase order, the Distributor will notify PGI and the Custodian of such order. The Custodian, who will have caused the appropriate local sub-custodian(s) of the Fund to maintain an account into which an AP may deliver the Fund Deposit (or cash in lieu), with adjustments determined by the Fund, will then provide information of the order to such local sub-custodian(s). The AP must also make available on or before the Settlement, by means satisfactory to the Fund, immediately available or same day funds in U.S. dollars estimated by the Fund to be sufficient to pay the Cash Component and Transaction Fee.

While, as stated above, Creation Units are generally delivered no later than the second Business Day following the day on which the order is deemed received by the Distributor, each Fund may settle Creation Unit transactions on a basis other than the one described above to accommodate foreign market holiday schedules, to account for different treatment among foreign and U.S. markets of dividend record dates and ex-dividend dates (that is the last day the holder of a security can sell the security and still receive dividends payable on the security), and in certain other circumstances.

Acceptance of Orders for Creation Units

The Trust reserves the absolute right to reject a creation order transmitted to it by the Distributor in respect of the Funds if: (i) the order is not in proper form; (ii) the investor(s), upon obtaining the Shares, would own 80% or more of the currently outstanding Shares of the Fund; (iii) the securities delivered do not conform to the In-Kind Creation Basket for the relevant date; (iv) acceptance of the Fund Deposit would have adverse tax consequences to the Fund; (v) acceptance of the Fund Deposit would, in the opinion of counsel, be unlawful; (vi) acceptance of the Fund Deposit would otherwise, in the discretion of the Trust, the Fund, or PGI, will have an adverse effect on the Trust, the Fund or the rights of beneficial owners; or (vii) in the event that circumstances that are outside the control of the Trust make it practically impossible to process creation orders. Examples of such circumstances include acts of God; public service or utility problems resulting in telephone, telecopy and computer failures; fires, floods or extreme weather conditions; market conditions or activities causing trading halts; systems failures involving computer or other information systems affecting the Trust, PGI, a Sub-Advisor, the Transfer Agent, the Distributor, DTC, NSCC, the Custodian or sub-custodian or any other participant in the creation process; and similar extraordinary events. The Distributor shall notify an AP of its rejection of the order. The Funds, the Custodian, any sub-custodian, the Transfer Agent and the Distributor are under no duty, however, to give notification of any defects or irregularities in the delivery of Fund Deposits, and they shall not incur any liability for the failure to give any such notification.

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Issuance of a Creation Unit

Once a Fund has accepted a creation order, upon next determination of the Fund’s NAV, the Fund will confirm the issuance of a Creation Unit, against receipt of payment, at such NAV. The Distributor will transmit a confirmation of acceptance to the AP that placed the order.

Except as provided below, a Creation Unit will not be issued until the Fund obtains good title to the In-Kind Creation Basket securities and the Cash Component, along with any cash in lieu and Transaction Fee. Except as provided in Appendix B, the delivery of Creation Units will generally occur no later than the second Business Day following the Transmittal Date for securities.

In certain cases, APs will create and redeem Creation Units on the same trade date. In these instances, the Trust reserves the right to settle these transactions on a net basis.

With respect to orders involving foreign securities, when the applicable local sub-custodian(s) has confirmed to the Custodian that the In-Kind Creation Basket (or cash in lieu) has been delivered to the Fund’s account at the applicable sub-custodian(s), the Distributor and PGI shall be notified of such delivery, and the Fund will issue and cause the delivery of the Creation Unit.

Creation Units may be created in advance of receipt by the Trust of all or a portion of the applicable In-Kind Creation Basket, provided the purchaser tenders an initial deposit consisting of any available securities in the In-Kind Creation Basket and cash equal to the sum of the Cash Component and at least 115% of the market value, as adjusted from time to time by, of the In-Kind Creation Basket securities not delivered (“Additional Cash Deposit”). Such initial deposit will have a value greater than the NAV of the Creation Unit on the date the order is placed. The order shall be deemed to be received on the Transmittal Date provided that it is placed in proper form prior to 4:00 p.m., Eastern Time, on such date, and federal funds in the appropriate amount are deposited with the Custodian by the DTC Cut-Off Time the following Business Day. If the order is not placed in proper form by 4:00 p.m., Eastern Time, or federal funds in the appropriate amount are not received by the DTC Cut-Off Time the next Business Day, then the order will be canceled or deemed unreceived and the AP effectuating such transaction will be liable to the Fund for any losses resulting therefrom.

To the extent securities in the In-Kind Creation Basket remain undelivered, pending delivery of such securities additional cash will be required to be deposited with the Trust as necessary to maintain an Additional Cash Deposit equal to at least 115% (as adjusted by PGI) of the daily marked-to-market value of the missing securities. To the extent that either such securities are still not received by 1:00 p.m., Eastern Time, on the second Business Day following the day on which the purchase order is deemed received by the Distributor or a marked-to- market payment is not made within one Business Day following notification to the purchaser and/or AP that such a payment is required, the Trust may use the cash on deposit to purchase the missing securities, and the AP effectuating such transaction will be liable to the Fund for any costs incurred therein or losses resulting therefrom, including any Transaction Fee, any amount by which the actual purchase price of the missing securities exceeds the Additional Cash Deposit or the market value of such securities on the day the purchase order was deemed received by the Distributor, as well as brokerage and related transaction costs. The Trust will return any unused portion of the Additional Cash Deposit once all of the missing securities have been received by the Trust. The delivery of Creation Units so created will occur no later than the second Business Day following the day on which the purchase order is deemed received by the Distributor.

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Transaction Fees

To compensate for costs incurred in connection with creation and redemption transactions, investors will be required to pay a Transaction Fee as follows:

ETF	Standard Creation Transaction Fee *	Maximum Variable Charge for Cash Creation **	Standard Redemption Transaction Fee *	Maximum Variable Charge for Cash Redemptions **
Principal Active Global Dividend Income	$500	3.00%	$500	2.00%
Principal Contrarian Value Index	$750	3.00%	$750	2.00%
Principal EDGE Active Income	$500	3.00%	$500	2.00%
Principal Healthcare Innovators Index	$600	3.00%	$600	2.00%
Principal International Multi-Factor Index	$2,000	3