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IQ MacKay Municipal Short Duration ETF

IQ MacKay Municipal Short Duration ETF

Investment Objective

The IQ MacKay Municipal Short Duration ETF (the “Fund”) seeks current income exempt from federal income tax.

Fees and Expenses of the Fund

This table describes fees and expenses that you may pay if you buy, sell or hold shares of the Fund (“Shares”). Investors may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example set forth below.

Shareholder Fees (fees paid directly from your investment):None

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment):

Annual Fund Operating Expenses	IQ MacKay Municipal Short Duration ETF IQ MacKay Municipal Short Duration ETF
Management Fee	0.30%
Distribution and/or Service (12b-1) Fees	none
Other Expenses	0.17%	[1]
Total Annual Fund Operating Expenses	0.47%
Expense Waiver/Reimbursement	0.17%	[2]
Total Annual Fund Operating Expenses After Expense Waiver/Reimbursement	0.30%

Example.

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other funds. This example does not take into account brokerage commissions that you pay when purchasing or selling Shares of the Fund.

The example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your Shares at the end of those periods. The example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain at current levels. The return of 5% and estimated expenses are for illustration purposes only, and should not be considered indicators of expected Fund expenses or performance, which may be greater or less than the estimates. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example	1 Year	3 Years
IQ MacKay Municipal Short Duration ETF | IQ MacKay Municipal Short Duration ETF | USD ($)	31	134

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities or other instruments. A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when 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. As of the date of this Prospectus, the Fund had not yet commenced operations.

Principal Investment Strategies

The Fund is an actively managed ETF and thus does not seek to replicate the performance of a specific index. Instead, the Fund uses an active management strategy to meet its investment objective. Consequently, investors should not expect the Fund’s returns to track the returns of any index or market for any period of time.

The Fund, under normal circumstances, invests at least 80% of its assets (net assets plus borrowings for investment purposes) in debt securities whose interest is, in the opinion of bond counsel for the issuer at the time of issuance, exempt from federal income tax (“Municipal Bonds”). The Fund typically invests at least 80% of its

net assets in Municipal Bonds that are rated investment grade by at least one independent rating agency (i.e., within the highest four quality ratings by Moody’s Investors Service, Inc., Standard & Poor’s Ratings Services or Fitch Ratings, Inc.). If independent rating agencies assign different ratings to the same security, the Fund will use the higher rating for purposes of determining the security’s credit quality. The Fund generally will maintain a dollar-weighted average duration of zero to three years.

Municipal Bonds are issued by or on behalf of the District of Columbia, states, territories, commonwealths and possessions of the United States and their political subdivisions and agencies, authorities and instrumentalities. The Fund may not invest more than 20% of its net assets in tax-exempt securities subject to the federal alternative minimum tax.

The Fund may invest more than 25% of its total assets in Municipal Bonds that are related in such a way that an economic, business or political development or change affecting one such security could also affect the other securities. However, the Fund’s investments will be diversified among a minimum of ten different sectors of the Municipal Bond market, such as education, transportation and local general obligation. The Fund’s investments will be diversified among at least 15 different states, with no more than 30% of the Fund’s securities invested in municipal securities from a single state. Some of the Fund’s earnings may be subject to federal tax and most may be subject to state and local taxes.

MacKay Shields LLC’s (the “Subadvisor”) investment process begins with an assessment of macro factors that may impact the Municipal Bond market, including tax rates, U.S. Treasury rates, and global economic data, as well as other regulatory, tax, governmental, and technical factors that may impact the Municipal Bond market. Additionally, the Subadvisor may give consideration to certain environmental, social and governance (“ESG”) criteria when evaluating an investment opportunity. Following the assessment of these factors, the Subadvisor develops an investment strategy to position the Fund among various sectors of the Municipal Bond market and different states. The Subadvisor then employs a fundamental, “bottom-up” credit research analysis to select individual Municipal Bonds.

The Subadvisor may sell a security if it no longer believes the security will contribute to meeting the investment objective of the Fund. In considering whether to sell a security, the Subadvisor may evaluate, among other things, the condition of the economy and meaningful changes in the issuer’s financial condition.

Principal Risks

As with all investments, there are certain risks of investing in the Fund. The Shares will change in value and you could lose money by investing in the Fund. An investment in the Fund does not represent a complete investment program. An investment in the Fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You should consider carefully the following risks before investing in the Fund. A more complete discussion of Principal Risks is included under “Description of the Principal Risks of the Fund.”

Authorized Participant Concentration Risk

Only certain large institutions may engage in creation or redemption transactions directly with the Fund (each, an “Authorized Participant”). The Fund has a limited number of institutions that may act as Authorized Participants on an agency basis (i.e., on behalf of other market participants). To the extent that those Authorized Participants exit the business or are unable to proceed with creation and/or redemption orders with the Fund and no other Authorized Participant is able to step forward to engage in creation and redemption transactions with the Fund, Shares may be more likely to trade at a premium or discount to NAV and possibly face trading halts and/or delisting.

Cash Transactions Risk

The Fund currently intends to effect creations and redemptions principally for cash, rather than for in-kind securities. For this reason, the Fund may be required to sell portfolio securities in order to obtain the cash needed to distribute redemption proceeds. The Fund may recognize a capital gain on these sales that might not have been incurred if the Fund had made a redemption in-kind. This may decrease the tax efficiency of the Fund compared to ETFs that utilize an in-kind redemption process.

Credit Risk

Credit risk is the risk that the issuer or guarantor of a debt instrument or the counterparty to a derivatives contract, repurchase agreement or loan of portfolio securities will be unable or unwilling to make its timely interest and/or principal payments when due or otherwise honor its obligations. Changes in an issuer’s or

counterparty’s credit rating or the market’s perception of an issuer’s or counterparty’s creditworthiness may also adversely affect the value of the Fund’s investment in that issuer. The degree of credit risk depends on an issuer’s or counterparty’s financial condition and on the terms of an obligation.

Cyber Security Risk

The Fund is susceptible to operational risks through breaches in cyber security. Such events may cause the Fund to lose proprietary information, suffer data corruption or lose operational capacity and could cause the Fund to incur regulatory penalties, reputational damage, additional compliance costs associated with corrective measures and/or financial loss. In addition, cyber security breaches of the securities issuers or the Fund’s third-party service providers can also subject the Fund to many of the same risks associated with direct cyber security breaches. Although the Fund has established risk management systems designed to reduce the risks associated with cyber security, there is no guarantee that such efforts will succeed.

Focused Investment Risk

To the extent that the Fund invests a large percentage of its assets in a single asset class or the securities of issuers within the same country, group of countries, region, industry, group of industries or sector, an adverse economic, market, political or regulatory development may affect the value of the Fund’s investments more than if the Fund were more broadly diversified. Different asset classes, countries, groups of countries, regions, industries, groups of industries or sectors tend to go through cycles of outperformance and underperformance in comparison to each other and to the general financial markets.

Income Risk

The Fund’s income may decline when interest rates fall or if there are defaults in its portfolio. This decline can occur because the Fund may subsequently invest in lower-yielding securities when securities in its portfolio mature or the Fund otherwise needs to purchase additional securities

Interest Rate Risk

An increase in interest rates may cause the value of securities held by the Fund to decline. Fixed income securities with longer durations tend to be more sensitive to changes in interest rates, making them more volatile than securities with shorter durations or floating or adjustable interest rates. The negative impact on the Fund from potential interest rate increases could be swift and significant, including falling market values, increased redemptions and reduced liquidity. The Fund may be subject to a greater risk of rising interest rates than would normally be the case due to the current period of historically low rates and the effect of potential government fiscal policy initiatives and resulting market reaction to those initiatives.

When interest rates rise, certain obligations will be paid off by the issuer (or other obligated party) more slowly than anticipated, causing the value of these securities to fall. As a result, in a period of rising interest rates, securities may exhibit additional volatility and may lose value. The value of securities with longer maturities generally changes more in response to changes in interest rates than does the value of securities with shorter maturities.

During periods of falling interest rates, an issuer of a callable security held by the Fund may “call” or repay the security before its stated maturity, which may result in the Fund having to reinvest the proceeds in securities with lower yields, resulting in a decline in the Fund’s income, or in securities with greater risks or with other less favorable features.

The terms of floating rate notes and other instruments may be tied to the London Interbank Offered Rate (“LIBOR”), which functions as a reference rate or benchmark. It is anticipated that LIBOR will be discontinued at the end of 2021, which may cause increased volatility and illiquidity in the markets for instruments with terms tied to LIBOR or other adverse consequences, such as decreased yields and reduction in value, for these instruments. These events may adversely affect the Fund and its investments in such instruments.

Issuer Risk

The performance of the Fund depends on the performance of individual securities to which the Fund has exposure. Changes to the financial condition or credit rating of an issuer of those securities may cause the value of the securities to decline.

Liquidity Risk

Liquidity risk exists when particular investments are difficult to purchase or sell. Certain investments may be subject to restrictions on resale, trade over-the-counter or in limited volume, or lack an active trading market. Accordingly, the Fund may not be able to sell or close out of such investments at favorable times or prices (or at

all), or at the prices approximating those at which the Fund currently values them. Illiquid securities may trade at a discount from comparable, more liquid investments and may be subject to wide fluctuations in market value.

Market Risk

Market risks include political, regulatory, market and economic developments, including developments that impact specific economic sectors, industries or segments of the market, which may affect the Fund’s value. Turbulence in financial markets, tariffs and other protectionist measures, political developments and uncertainty, central bank policy, and reduced liquidity in equity, credit and fixed income markets may negatively affect many issuers worldwide, which could have an adverse effect on the Fund. During a general downturn in the securities markets, multiple asset classes may be negatively affected. Geopolitical and other events, including war, terrorism, economic uncertainty, trade disputes, public health crises and related geopolitical events have led, and in the future may lead, to disruptions in the US and world economies and markets, which may increase financial market volatility and have significant adverse direct or indirect effects on a Fund and its investments. Market disruptions could cause the Fund to lose money, experience significant redemptions, and encounter operational difficulties. Although multiple asset classes may be affected by a market disruption, the duration and effects may not be the same for all types of assets.

Municipal Bond Market Liquidity Risk

Inventories of Municipal Bonds held by brokers and dealers may decrease, lessening their ability to make a market in these securities. Any reduction in market-making capacity has the potential to decrease the Fund’s ability to buy or sell Municipal Bonds and increase price volatility and trading costs, particularly during periods of economic or market stress. As a result, the Fund may be forced to accept a lower price to sell a Municipal Bond, to sell other securities to raise cash, or to give up an investment opportunity, any of which could have a negative effect on performance.

Municipal Bond Risk

Issuers, including governmental issuers, may be unable to pay their obligations as they come due. The values of Municipal Bonds that depend on a specific revenue source to fund their payment obligations may fluctuate as a result of actual or anticipated changes in the cash flows generated by the revenue source or changes in the priority of the municipal obligation to receive the cash flows generated by the revenue source. The values of Municipal Bonds held by the Fund may be adversely affected by local political and economic conditions and developments. Adverse conditions in an industry significant to a local economy could have a correspondingly adverse effect on the financial condition of local issuers. This risk would be heightened to the extent that the Fund invests a substantial portion of its assets in Municipal Bonds issued pursuant to similar projects or whose interest is paid solely from revenues of similar projects. In addition, income from Municipal Bonds held by the Fund could be declared taxable because of, among other things, unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service or state tax authorities, or noncompliant conduct of an issuer or other obligated party. Loss of tax-exempt status may cause interest received and distributed to shareholders by the Fund to be taxable and may result in a significant decline in the values of such municipal securities. There are various different types of Municipal Bonds, each with its own unique risk profile. Some of these risks include:

•

General Obligation Bonds Risk—timely payments depend on the issuer’s credit quality, ability to raise tax revenues and ability to maintain an adequate tax base;

•

Revenue Bonds (including Industrial Development Bonds) Risk—timely payments depend on the money earned by the particular facility or class of facilities, or the amount of revenues derived from another source, and may be negatively impacted by the general credit of the user of the facility;

•

Private Activity Bonds Risk—municipalities and other public authorities issue private activity bonds to finance development of industrial facilities for use by a private enterprise, which is solely responsible for paying the principal and interest on the bonds, and payment under these bonds depends on the private enterprise’s ability to do so;

•

Moral Obligation Bonds Risk—moral obligation bonds are generally issued by special purpose public authorities of a state or municipality. If the issuer is unable to meet its obligations, repayment of these bonds becomes a moral commitment, but not a legal obligation, of the state or municipality;

•

Municipal Notes Risk—municipal notes are shorter-term municipal debt obligations that pay interest that is, in the opinion of bond counsel for the issuer at the time of issuance, generally excludable from gross

income for federal income tax purposes (except that the interest may be includable in taxable income for purposes of the federal alternative minimum tax) and that have a maturity that is generally one year or less. If there is a shortfall in the anticipated proceeds, the notes may not be fully repaid and the Fund may lose money; and

•

Municipal Lease Obligations Risk—in a municipal lease obligation, the issuer agrees to make payments when due on the lease obligation. Although the issuer does not pledge its unlimited taxing power for payment of the lease obligation, the lease obligation is secured by the leased property.

Municipal Bond Valuation Risk

The Municipal Bonds in which the Fund invests are typically valued by a pricing service utilizing a range of market-based inputs and assumptions, including readily available market quotations obtained from broker-dealers making markets in such securities, cash flows and transactions for comparable instruments. There is no assurance that the Fund will be able to sell a portfolio security at the price established by the pricing service, which could result in a loss to the Fund.

New Fund Risk

As a new fund, there can be no assurance that the Fund will grow to or maintain an economically viable size or it could ultimately liquidate. Like other new funds, large inflows and outflows may impact the Fund’s market exposure for limited periods of time. This impact may be positive or negative, depending on the direction of market movement during the period affected.

Operational Risk

The Fund is exposed to operational risks arising from a number of factors, including, but not limited to, human error, processing and communication errors, errors of the Fund’s service providers, counterparties or other third-parties, failed or inadequate processes and technology or systems failures. The Fund and Advisor seek to reduce these operational risks through controls and procedures. However, these measures do not address every possible risk and may be inadequate to address significant operational risks.

Portfolio Management Risk

The Fund is subject to portfolio management risk because it is an actively managed portfolio. In managing the Fund’s investment portfolio, the portfolio managers will apply investment techniques and risk analyses that may not produce the desired result or, while it may be the desired result, may underperform other types of investment strategies. The application of ESG criteria may result in the Fund (i) having exposure to certain securities or industry sectors that are significantly different than the composition of the Fund’s benchmark; and (ii) performing differently than other funds and strategies in its peer group that do not take into account ESG criteria or the Fund’s benchmark. There can be no guarantee that the Fund will meet its investment objective(s).

Secondary Market Trading Risk

Although the Fund’s Shares are listed for trading on one or more securities exchanges, there can be no assurance that an active trading market for such Shares will develop or be maintained by market makers or Authorized Participants. In general, the trading of Shares on securities exchanges is subject to the risk of irregular trading activity and wide “bid/ask” spreads (which may be especially pronounced for smaller funds). Additionally, market makers are under no obligation to make a market in the Fund’s Shares and Authorized Participants are not obligated to submit purchase or redemption orders for Creation Units. In the event market makers cease making a market in the Fund’s Shares or Authorized Participants stop submitting purchase or redemption orders for Creation Units, the Fund’s Shares may trade at a larger premium or discount to its NAV. Wide bid-ask spreads and large premiums or discounts to NAV are likely to lead to an investor buying his or her shares at a market price that is more than their value, and selling those shares at a market price that is less than their value.

Trading Price Risk

Shares of the Fund trade on securities exchanges at prices at, above or below the Fund’s most recent NAV. The NAV of the Fund is calculated at the end of each business day and fluctuates with changes in the market value of the Fund’s holdings. The trading price of the Fund’s Shares fluctuates continuously throughout trading hours based on both market supply of and demand for Shares and the underlying value of the Fund’s portfolio holdings or NAV. As a result, the trading prices of the Fund’s Shares may deviate significantly from NAV during periods of market volatility. Any of these factors, among others, may lead to the Fund’s Shares trading at a

premium or discount to NAV. Although it is generally expected that the market price of the Shares of the Fund will approximate the Fund’s NAV, there may be times when the market price and the NAV vary significantly. Thus, an investor may pay more than NAV when purchasing Shares and receive less than NAV when selling Shares.

Performance Information

As of the date of this Prospectus, the Fund has not yet commenced operations and therefore does not report its performance information.

[1] The Fund has not commenced operations and Other Expenses are based on estimated amounts for the current fiscal year.

[2] IndexIQ Advisors LLC (the “Advisor”) has contractually agreed to waive or reduce its management fee and/or reimburse expenses of the Fund in an amount that limits “Total Annual Fund Operating Expenses” ​(exclusive of interest, taxes, brokerage fees and commissions, dividends paid on short sales, acquired fund fees and expenses, and extraordinary expenses) to not more than 0.30% of average daily net assets of the Fund. The agreement will remain in effect until August 31, 2022, unless terminated by the Board of Trustees.