Summary Prospectus dated November 29, 2017

Eaton Vance Floating-Rate NextShares

Ticker     EVFTC

Listing Exchange: The NASDAQ Stock Market LLC

This Summary Prospectus is designed to provide investors with key fund information in a clear and concise format. Before you invest, you may want to review the Fund’s Prospectus and Statement of Additional Information, which contain more information about the Fund and its risks. The Fund’s Prospectus and Statement of Additional Information, both dated November 29, 2017, as may be amended or supplemented, are incorporated by reference into this Summary Prospectus. For free paper or electronic copies of the Fund’s Prospectus, Statement of Additional Information, and other information about the Fund, go to http://www.eatonvance.com/nextsharesdocuments, email a request to contact@eatonvance.com, call 1-800-262-1122, or ask any financial advisor, bank, or broker-dealer who offers shares of the Fund. Unless otherwise noted, page number references refer to the current Prospectus for this Fund.

Investment Objective

The Fund’s investment objective is to provide a high level of 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.

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

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment) (1)
Management Fees	0.64%
Distribution and Service (12b-1) Fees	None
Other Expenses(2)	0.24%
Total Annual Fund Operating Expenses	0.88%
Expense Reimbursement(3)	(0.15)%
Total Annual Fund Operating Expenses after Expense Reimbursement	0.73%

⁽¹⁾ Expenses in the table above and the Example below reflect the expenses of the Fund and the Eaton Vance Floating Rate Portfolio (the “Portfolio”), the Fund’s master Portfolio.

⁽²⁾ Based on estimates for the current fiscal year.

⁽³⁾ The investment adviser and administrator have agreed to reimburse the Fund’s expenses to the extent that Total Annual Fund Operating Expenses exceed 0.73%. This expense reimbursement will continue through February 28, 2019. Any amendment to or termination of this reimbursement would require approval of the Board of Trustees. The expense reimbursement relates to ordinary operating expenses only and does not include expenses such as: brokerage commissions, acquired fund fees and expenses of unaffiliated funds, interest expense, taxes or litigation expenses. Amounts reimbursed may be recouped by the investment adviser and administrator during the same fiscal year to the extent actual expenses are less than the contractual expense cap during such year.

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 and then redeem all of your shares at the end of those periods. The Example also assumes that the Fund provides a return of 5% a year and that Fund operating expenses remain the same. Investors may pay brokerage commissions on their purchases and sales of Fund shares, which are not reflected in the example. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

1 Year	3 Years
$75	$266

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” the 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.

Principal Investment Strategies

Under normal circumstances, the Fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in income producing floating rate loans and other floating rate debt securities. The Fund invests primarily in senior floating rate loans of domestic and foreign borrowers (“Senior Loans”). Senior Loans typically are of below investment grade quality and have below investment grade credit ratings, which ratings are associated with securities having high risk, speculative characteristics (sometimes referred to as “junk”).

The Fund may invest up to 25% of its total assets in foreign Senior Loans. Foreign Senior Loans must be denominated in U.S. dollars, euros, British pounds, Swiss francs, Canadian dollars, or Australian dollars. The Fund may also invest in secured and unsecured subordinated loans, second lien loans and subordinated bridge loans (“Junior Loans”), other floating rate debt securities, fixed-income debt obligations and money market instruments. Other floating rate debt securities, fixed-income debt securities and money market instruments may include: bonds, notes and debentures issued by corporations; debt securities issued or guaranteed by the U.S. government or one if its agencies or instrumentalities; and commercial paper. Money market instruments with a remaining maturity of less than 60 days are deemed floating rate debt securities. The Fund may engage in derivative transactions (such as futures contracts and options thereon, foreign currency exchange contracts and other currency hedging strategies, and interest rate swaps) to seek to hedge against fluctuations in currency exchange rates and interest rates. There is no stated limit on the Fund’s use of derivatives.

The investment adviser seeks to maintain broad borrower and industry diversification among the Fund’s Senior Loans. When selecting Senior Loans, the investment adviser seeks to implement a systematic risk-weighted approach that utilizes fundamental analysis of risk/return characteristics. Senior Loans may be sold, if in the opinion of the investment adviser, the risk-return profile deteriorates or to pursue more attractive investment opportunities. In managing the Fund, the investment adviser seeks to invest in a portfolio of Senior Loans that it believes will be less volatile over time than the general loan market. Preservation of capital is considered when consistent with the Fund’s investment objective.

The Fund invests its assets in the Portfolio, a separate registered investment company with substantially the same investment objective and policies as the Fund.

About NextShares

NextShares are a new type of actively managed exchange-traded product operating pursuant to an order issued by the SEC granting an exemption from certain provisions of the Investment Company Act of 1940, as amended (the “1940 Act”). NextShares funds began trading in February 2016 and have a limited operating history. There can be no guarantee that an active trading market for NextShares will develop or be maintained, or that their listing will continue unchanged.

Individual shares of a NextShares fund may be purchased and sold only on a national securities exchange or alternative trading system through a broker-dealer that offers NextShares (“Broker”), and may not be directly purchased or redeemed from the fund. As a new type of fund, NextShares initially may be offered by a limited number of Brokers. Trading prices of NextShares are directly linked to the fund’s next-computed net asset value per share (“NAV”), which is normally determined as of the close of regular market trading each business day. Buyers and sellers of NextShares will not know the value of their purchases and sales until NAV is determined at the end of the trading day.

Trading prices of NextShares will vary from NAV by a market-determined trading cost (i.e., a premium or discount to NAV), which may be zero. The premium or discount to NAV at which NextShares trades are executed is locked in at the time of trade execution, and will depend on market factors, including the balance of supply and demand for shares among investors, transaction fees and other costs associated with creating and redeeming Creation Units (as defined below) of shares, competition among market makers, the share inventory positions and inventory strategies of market makers, and the volume of share trading. Reflecting these and other market factors, prices of shares in the secondary market may be above, at or below NAV. See “Purchases and Sales of Fund Shares” below for important information about how to buy and sell shares.

Eaton Vance Floating-Rate NextShares 2 Summary Prospectus dated November 29, 2017

How NextShares Compare to Mutual Funds. Mutual fund shares may be purchased and redeemed directly from the issuing fund for cash at the fund’s next determined NAV. Shares of NextShares funds, by contrast, are purchased and sold primarily in the secondary market. Because trading prices of NextShares may vary from NAV and commissions may apply, NextShares may be more expensive to buy and sell than mutual funds. Like mutual funds, NextShares may be bought or sold in specified share or dollar quantities, although not all Brokers may accept dollar-based orders.

Relative to investing in mutual funds, the NextShares structure offers certain potential advantages that may translate into improved performance and higher tax efficiency. These potential advantages include: (a) a single class of shares with no sales loads or distribution and service (12b-1) fees; (b) lower fund transfer agency expenses; (c) reduced fund trading costs and cash drag in connection with shareholder inflows and outflows; and (d) lower fund capital gains distributions. Because NextShares do not pay sales loads or distribution and service (12b-1) fees, their appeal to financial intermediaries may be limited to distribution arrangements that do not rely upon such payments.

How NextShares Compare to ETFs. Similar to ETFs, NextShares are issued and redeemed only in specified large aggregations (“Creation Units”) and trade throughout the day on an exchange. Unlike ETFs, trading prices of NextShares are directly linked to the fund’s next end-of-day NAV rather than determined at the time of trade execution. Different from ETFs, NextShares do not offer opportunities to transact intraday at currently (versus end-of-day) determined prices.

Unlike actively managed ETFs, NextShares are not required to disclose their full holdings on a daily basis, thereby protecting fund shareholders against the potentially dilutive effects of other market participants front-running the fund’s trades. Because the mechanism that underlies efficient trading of NextShares does not involve portfolio instruments not used in creations and redemptions, the need for full portfolio holdings disclosure to achieve tight markets in NextShares is eliminated. The NAV-based trading employed for NextShares provides investors with built-in trade execution cost transparency and the ability to control their trading costs using limit orders. This feature of NextShares distinguishes them from ETFs, for which the variance between market prices and underlying portfolio values is not always known by individual investors and cannot be controlled by them. For more information, see “Additional Information about NextShares.”

Principal Risks

Market Trading Risk. Individual Fund shares may be purchased and sold only on a national securities exchange or alternative trading system through a Broker, and may not be directly purchased or redeemed from the Fund. There can be no guarantee that an active trading market for shares will develop or be maintained, or that their listing will continue unchanged. Buying and selling shares may require you to pay brokerage commissions and expose you to other trading costs. Due to brokerage commissions and other transaction costs that may apply, frequent trading may detract from realized investment returns. Trading prices of shares may be above, at or below the Fund’s NAV, will fluctuate in relation to NAV based on supply and demand in the market for shares and other factors, and may vary significantly from NAV during periods of market volatility. The return on your investment will be reduced if you sell shares at a greater discount or narrower premium to NAV than you acquired shares.

Contingent Pricing Risk. Trading prices of Fund shares are directly linked to the Fund’s next-computed NAV, which is normally determined as of the close of regular market trading each business day. Buyers and sellers of shares will not know the value of their purchases and sales until the Fund’s NAV is determined at the end of the trading day. Like mutual funds, the Fund does not offer opportunities to transact intraday at currently (versus end-of-day) determined prices. Trade prices are contingent upon the determination of NAV and may vary significantly from anticipated levels (including estimates based on intraday indicative values disseminated by the Fund) during periods of market volatility. Although limit orders can be used to control differences in trade prices versus NAV, they cannot be used to control or limit trade execution prices.

Market Risk. Economic and other events (whether real, expected or perceived) can reduce the demand for investments held by the Fund, which may reduce their market prices and cause the value of Fund shares to fall. The frequency and magnitude of such changes cannot be predicted. Certain securities and other investments held by the Fund can experience downturns in trading activity and, at such times, the supply of such instruments in the market may exceed the demand. At other times, the demand for such instruments may exceed the supply in the market. An imbalance in supply and demand in the market may result in greater price volatility, less liquidity, wider trading spreads and a lack of price transparency in the market. No active trading market may exist for certain investments, which may impair the ability of the Fund to sell or to realize the current valuation of such investments in the event of the need to liquidate such assets. Adverse market conditions may impair the liquidity of some actively traded investments. Fixed-income markets may experience periods of relatively high volatility due to rising U.S. Treasury yields which, in part, reflect the market’s expectations for higher U.S. economic growth and inflation. As a result of the Federal Reserve’s recent decision to (i) raise the target fed funds rate over the last two years and (ii) slowly unwind its quantitative easing program, and the possibility that it may continue with either or both policies going forward, among other factors, markets could experience increased volatility, which could negatively impact the Fund’s performance.

Eaton Vance Floating-Rate NextShares 3 Summary Prospectus dated November 29, 2017

Credit Risk. Investments in debt obligations are subject to the risk of non-payment of scheduled principal and interest. Changes in economic conditions or other circumstances may reduce the capacity of the party obligated to make principal and interest payments on such instruments and may lead to defaults. Such non-payments and defaults may reduce the value of Fund shares and income distributions. The value of a debt obligation also may decline because of concerns about the issuer’s ability to make principal and interest payments. In addition, the credit ratings of loans or other income instruments may be lowered if the financial condition of the party obligated to make payments with respect to such instruments changes. Credit ratings assigned by rating agencies are based on a number of factors and do not necessarily reflect the issuer’s current financial condition or the volatility or liquidity of the security. In the event of bankruptcy of the issuer of loans or other income instruments, the Fund could experience delays or limitations with respect to its ability to realize the benefits of any collateral securing the instrument. In order to enforce its rights in the event of a default, bankruptcy or similar situation, the Fund may be required to retain legal or similar counsel. This may increase the Fund’s operating expenses and adversely affect net asset value. Due to their lower place in the borrower’s capital structure, Junior Loans involve a higher degree of overall risk than Senior Loans of the same borrower.

Additional Risks of Loans. Loans are traded in a private, unregulated inter-dealer or inter-bank resale market and are generally subject to contractual restrictions that must be satisfied before a loan can be bought or sold. These restrictions may impede the Fund’s ability to buy or sell loans (thus affecting their liquidity) and may negatively impact the transaction price.  See also “Market Risk” above.  It also may take longer than seven days for transactions in loans to settle.  Due to the possibility of an extended loan settlement process, the Fund may hold cash, sell investments or temporarily borrow from banks or other lenders to meet short-term liquidity needs, such as to satisfy redemption requests from Fund shareholders.  Loans may be structured such that they are not securities under securities law, and in the event of fraud or misrepresentation by a borrower, lenders may not have the protection of the anti-fraud provisions of the federal securities laws.  Loans are also subject to risks associated with other types of income investments as described herein.

Risk of Lower Rated Investments. Investments rated below investment grade and comparable unrated investments (“junk”) have speculative characteristics because of the credit risk associated with their issuers. Changes in economic conditions or other circumstances typically have a greater effect on the ability of issuers of lower rated investments to make principal and interest payments than they do on issuers of higher rated investments. An economic downturn generally leads to a higher non-payment rate, and a lower rated investment may lose significant value before a default occurs. Lower rated investments typically are subject to greater price volatility and illiquidity than higher rated investments.

Interest Rate Risk. In general, the value of income securities will fluctuate based on changes in interest rates. The value of these securities is likely to increase when interest rates fall and decline when interest rates rise. Generally, securities with longer durations are more sensitive to changes in interest rates than shorter duration securities. The impact of interest rate changes on the value of floating rate investments is typically reduced by periodic interest rate resets. In a rising interest rate environment, the duration of income securities that have the ability to be prepaid or called by the issuer may be extended. In a declining interest rate environment, the proceeds from prepaid or maturing instruments may have to be reinvested at a lower interest rate.

Foreign Investment Risk. Because the Fund can invest a portion of its assets in foreign instruments, the value of Fund shares can be adversely affected by changes in currency exchange rates and political and economic developments abroad, including the imposition of economic and other sanctions by the United States or another country. Foreign markets may be smaller, less liquid and more volatile than the major markets in the United States, and as a result, Fund share values may be more volatile. Trading in foreign markets typically involves higher expense than trading in the United States. The Fund may have difficulties enforcing its legal or contractual rights in a foreign country.

Risk of U.S. Government-Sponsored Agencies. Although certain U.S. Government-sponsored agencies (such as the Federal Home Loan Mortgage Corporation and the Federal National Mortgage Association) may be chartered or sponsored by acts of Congress, their securities are neither issued nor guaranteed by the U.S. Treasury.

Derivatives Risk. The use of derivatives can lead to losses because of adverse movements in the price or value of the asset, index, rate or instrument underlying a derivative, due to failure of a counterparty or due to tax or regulatory constraints. Derivatives may create economic leverage, which represents a non-cash exposure to the underlying asset, index, rate or instrument. Leverage can increase both the risk and return potential of the Fund. Derivatives risk may be more significant when derivatives are used to enhance return or as a substitute for a cash investment position, rather than solely to hedge the risk of a position held by the Fund.   A decision as to whether, when and how to use derivatives involves the exercise of specialized skill and judgment, and a transaction may be unsuccessful in whole or in part because of market behavior or unexpected events. Changes in the value of a derivative may not correlate perfectly with the underlying asset, rate or index. Derivative instruments traded in over-the-counter markets may be difficult to value, may

Eaton Vance Floating-Rate NextShares 4 Summary Prospectus dated November 29, 2017

be illiquid, and may be subject to wide swings in valuation caused by changes in the value of the underlying instrument. If a derivative’s counterparty is unable to honor its commitments, the value of Fund shares may decline and the Fund could experience delays in the return of collateral or other assets held by the counterparty. The loss on derivative transactions may substantially exceed the initial investment, particularly when there is no stated limit on the Fund’s use of derivatives.

Risks Associated with Active Management. The success of the Fund’s investment program depends on portfolio management’s successful application of analytical skills and investment judgment. Active management involves subjective decisions.

General Fund Investing Risks. The Fund is not a complete investment program and there is no guarantee that the Fund will achieve its investment objective. It is possible to lose money by investing in the Fund. The Fund is designed to be a long-term investment vehicle and is not suited for short-term trading. Investors in the Fund should have a long-term investment perspective and be able to tolerate potentially sharp declines in value. Purchase and redemption activities by Fund investors may impact the management of the Fund and its ability to achieve its investment objective. In addition, the redemption by one or more large investors or groups of investors of their holdings in the Fund could have an adverse impact on the remaining investors in the Fund. An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

Performance

The following bar chart and table provide information about the investment performance of the Portfolio, the separate registered investment company in which the Fund invests. The returns in the bar chart and table are for a mutual fund that invests in the Portfolio (the “Portfolio Investor”) and show how the Portfolio Investor’s average annual returns at NAV over time compare with those of a broad-based securities market index. The performance below does not represent the performance of the Fund. The investment performance of the Portfolio Investor (rather than the Portfolio itself) is included because it reflects the expenses typically borne by a retail fund investing in the Portfolio. The Portfolio Investor returns are not adjusted to reflect differences between the total net operating expenses of the Fund and the Portfolio Investor during the periods shown. If such an adjustment were made, the performance presented below would be higher, because the Fund’s total net operating expenses are lower than those of the Portfolio Investor. Performance is for a share class of the Portfolio Investor offered at net asset value. Past performance (both before and after taxes) is not necessarily an indication of how the Fund will perform in the future. Current Fund performance information can be obtained by visiting www.eatonvance.com.

For the ten years ended December 31, 2016, the highest quarterly total return for the Portfolio Investor was 18.99% for the quarter ended June 30, 2009, and the lowest quarterly return was -24.26% for the quarter ended December 31, 2008. The year-to-date total return through the end of the most recent calendar quarter (December 31, 2016 to September 30, 2017) was 3.34%. For the 30 days ended September 30, 2017, the SEC yield for the Portfolio Investor was 3.73%. For current yield information call 1-800-262-1122.

Average Annual Total Return as of December 31, 2016	One Year	Five Years	Ten Years
Return Before Taxes	11.07%	4.52%	3.85%
Return After Taxes on Distributions	9.07%	2.78%	2.06%
Return After Taxes on Distributions and the Sale of Fund Shares	6.24%	2.71%	2.23%
S&P/LSTA Leveraged Loan Index (reflects no deduction for fees, expenses or taxes)	10.16%	5.11%	4.63%

Investors cannot invest directly in an Index.

After-tax returns are calculated using the highest historical individual federal income tax rate and do not reflect the impact of state and local taxes. Actual after-tax returns depend on a shareholder’s tax situation and the actual characterization of distributions, and may differ from those shown. After-tax returns are not relevant for shareholders who hold Fund shares in tax-deferred accounts or to shares held by non-taxable entities. Return After Taxes on Distributions for a period may be the same as Return Before Taxes for that period because no taxable distributions were made during that period. Also, Return After Taxes on Distributions and Sale of Fund Shares for a period may be greater than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.

Eaton Vance Floating-Rate NextShares 5 Summary Prospectus dated November 29, 2017

Management

Investment Adviser. Eaton Vance Management (“Eaton Vance”) serves as investment adviser to the Fund. Boston Management and Research (“BMR”) serves as investment adviser to the Portfolio.

Portfolio Managers

Scott H. Page, Vice President of Eaton Vance and BMR, has managed the Fund since its inception in November 2017 and the Portfolio since February 2001.

Craig P. Russ, Vice President of Eaton Vance and BMR, has managed the Fund since its inception in November 2017 and the Portfolio since November 2007.

Purchases and Sales of Fund Shares

Buying and Selling Shares in the Secondary Market. Shares of the Fund are listed and available for trading on The NASDAQ Stock Market LLC (the “Listing Exchange”) during the Listing Exchange’s core trading session (generally 9:30 am to 4:00 pm eastern time). Shares may also be bought and sold on other national securities exchanges and alternative trading systems that have obtained appropriate licenses, adopted applicable rules and developed systems to support trading in Fund shares. Fund shares may be purchased and sold in the secondary market only through a Broker. When buying or selling shares, you may incur trading commissions or other charges determined by your Broker. The Fund does not impose any minimum investment for shares of the Fund purchased in the secondary market.

Buying and selling Fund shares is similar in most respects to buying and selling ETFs and listed stocks. Throughout each trading day, market makers post on an exchange bids to buy shares and offers to sell shares. Buyers and sellers submit trade orders through their Brokers. The executing trading venue matches orders received from Brokers against market maker quotes and other orders to execute trades, and reports the results of completed trades to the parties to the trade, member firms and market data services. Completed trades in Fund shares clear and settle just like ETF trades and listed stock trades, with settlement normally occurring on the third following business day (T+3). Orders to buy and sell Fund shares that are not executed on the day the order is submitted are automatically cancelled as of the close of trading that day.

Trading in Fund shares differs from buying and selling ETFs and listed stocks in four respects:

· how intraday prices of executed trades and bids and offers posted by market makers are expressed;

· how to determine the number of shares to buy or sell if you seek to transact in an approximate dollar amount;

· what limit orders mean and how limit prices are expressed; and

· how and when the final price of executed trades is determined.

Intraday Prices and Quote Display Format. The intraday price of executed trades and bids and offers quoted for Fund shares are all expressed relative to the Fund’s next determined NAV, rather than as an absolute dollar price. As noted above, the Fund’s NAV is normally determined as of the close of regular market trading each business day. As an illustration, shares of the Fund may be quoted intraday at a best bid of “NAV -$0.01” and a best offer of “NAV +$0.02.” A buy order executed at the quoted offer price would, in this example, be priced at two cents over the Fund’s NAV on the trade date. If the last trade in Fund shares was priced at two cents over NAV (the current best offer), it would be displayed as “NAV +$0.02.”

Bid and offer quotes and prices of Fund shares in NAV-based format can be accessed intraday on Broker terminals using the Fund’s ticker symbol. Market data services may display bid and offer quotes and trade prices in NAV-based format or in “proxy price” format, in which NAV is represented as 100.00 and premiums/discounts to NAV are represented by the same difference from 100.00 (to illustrate, NAV-$0.01 would be shown as 99.99 and NAV+$0.02 as 100.02). Historical information about the Fund’s trading costs and trading spreads is provided on its webpage on eatonvance.com.

Eaton Vance Floating-Rate NextShares 6 Summary Prospectus dated November 29, 2017

Sizing Buy and Sell Orders. NextShares may be purchased and sold in specified share or dollar quantities, although not all Brokers may accept dollar-based orders. In share-based orders, you specify the number of fund shares to buy or sell. Like share-based ETF and listed stock orders, determining the number of Fund shares to buy or sell if you seek to transact in an approximate dollar amount requires dividing the intended purchase or sale amount by the estimated price per share. To assist buyers and sellers in estimating transaction prices, the Fund makes available at intervals of not more than 15 minutes during the Listing Exchange’s regular trading session an indicative estimate of the Fund’s current portfolio value (“Intraday Indicative Value” or “IIV”). IIVs can be accessed on the Fund’s webpage at eatonvance.com and may also be available from Brokers and market data services.

The price of a transaction in Fund shares can be estimated as the sum of the most recent IIV and the current bid (for sales) or offer (for purchases). If, for example, you seek to buy approximately $15,000 of Fund shares when the current IIV is $19.98 and the current offer is NAV +$0.02, you should place an order to buy 750 shares (= $15,000 ÷ $20.00). And if you seek to sell approximately $15,000 of Fund shares when the current IIV is $19.98 and the current bid is NAV -$0.01, you should sell 751 shares (≈ $15,000 ÷ $19.97).

Because IIVs are estimates and will generally differ from NAV, they cannot be used to calculate with precision the dollar value of a prescribed number of shares to be bought or sold. Investors should understand that share transaction prices are based on the Fund’s next determined NAV, and that NAVs may vary significantly from IIVs during periods of intraday market volatility.

Limit Orders. A “limit order” is an order placed with a Broker to buy or sell a prescribed number of shares at a specified price or better. In entering limit orders to buy or sell Fund shares, limit prices are expressed relative to NAV (i.e., NAV +$0.02, NAV -$0.01), rather than as an absolute dollar price. By using limit orders, buyers and sellers of NextShares can control their trading costs in a manner not available for ETFs.

Although limit orders can be used to control differences in trade price versus NAV, they cannot be used to control or limit absolute trade execution prices.

Final Prices of Executed Trades. The premium or discount to NAV at which Fund shares trade is locked in at the time of trade execution, with the final price contingent upon the determination of NAV at the end of the trading day. If, for example, an order to buy or sell shares executes at NAV +$0.02 and the Fund’s NAV on the day of the trade is $20.00, the final trade price is $20.02.

Eaton Vance Floating-Rate NextShares 7 Summary Prospectus dated November 29, 2017

The premium or discount to NAV at which Fund shares trade depends on market factors, including the balance of supply and demand for shares among investors, transaction fees and other costs associated with creating and redeeming Creation Units, competition among market makers, the share inventory positions and inventory strategies of market makers, and the volume of share trading. NextShares do not offer investors the opportunity to buy and sell intraday at currently (versus end-of-day) determined prices. Buyers and sellers of shares will not know the final trade price of executed trades until the Fund’s NAV is determined at the end of the trading day. Trading prices of shares may be above, at or below NAV, and may vary significantly from NAV during periods of market volatility.

Transactions Directly with the Fund. The Fund issues and redeems shares only in Creation Unit blocks of 25,000 shares or multiples thereof. Creation Units may be purchased or redeemed only by or through “Authorized Participants,” which are broker-dealers or institutional investors that have entered into agreements with the Fund’s distributor for this purpose. The Fund issues and redeems Creation Units in return for the securities, other instruments and/or cash (the “Basket”) that the Fund specifies each business day. The Fund’s Basket is not intended to be representative of current holdings and may vary significantly from current portfolio positions. The Fund imposes transaction fees on Creation Units issued and redeemed to offset the estimated cost to the Fund of processing the transaction and converting the Basket to or from the desired portfolio composition. For more information, see “Buying and Selling Shares.”

Tax Information

If your shares are held in a taxable account, the Fund’s distributions will be taxed to you as ordinary income and/or capital gains, unless you are exempt from taxation. If your shares are held in a tax-advantaged account, you will generally be taxed only upon withdrawals from the account.

Payments to Broker-Dealers and Other Financial Intermediaries

If you purchase the Fund’s shares through a broker-dealer or other financial intermediary (such as a bank) (collectively, “financial intermediaries”), you should be aware that the Fund’s investment adviser (or one of its affiliates) may pay the financial intermediary for the sale of Fund shares and related services. These payments may create a conflict of interest by influencing the financial intermediary and your salesperson to recommend the Fund over another investment. Ask your salesperson or visit your financial intermediary’s website for more information.

27598 11.29.17 © 2017 Eaton Vance Management

Eaton Vance Floating-Rate NextShares 8 Summary Prospectus dated November 29, 2017