Effective August 7, 2023, Brandon Matsui, Kinzer Jennings and Alec Schaefer are each added as a portfolio manager of the Fund.

Environmental, social, and governance (ESG) criteria are a set of factors used by investors to evaluate potential investments. Environmental criteria consider how a company safeguards the environment, including corporate policies addressing climate change, for example. Social criteria examine how it manages relationships with employees, suppliers, customers, and the communities where it operates. Governance deals with a company's leadership, executive pay, and shareholder rights.

¹ SEC yield is a measure of the income generated by the portfolio's underlying asset over the trailing 30 days, relative to the asset base of the portfolio itself. The SEC 30-day yield -Subsidized (Sub.) reflects current fee waivers in effect. Absent such fee waivers, the yield would have been lower. The SEC 30-Day yield- Unsubsidized (Unsub.) does not reflect the fee waivers currently in effect.

² Where the net expense ratio is lower than the gross expense ratio, certain fees have been waived and/or expenses reimbursed. These waivers and/or reimbursements will continue for at least one year from the date of the applicable fund's current prospectus (unless otherwise noted in the applicable prospectus) or until such time as the fund's Board of Directors acts to discontinue all or a portion of such waivers and/or reimbursements. Absent such waivers and/or reimbursements, returns would have been lower. Expenses are based on the fund's current prospectus.

³ Bloomberg 9-12 Months Short Treasury Index measures the performance of U.S Treasury bills, notes, and bonds with a maturity between nine and twelve months. Unless otherwise stated, index returns do not reflect the effect of any applicable sales charges, commissions, expenses, taxes or leverage, as applicable. It is not possible to invest directly in an index. Historical performance of the index illustrates market trends and does not represent the past or future performance of the fund.

⁴ Characteristics Definitions:

The Yield to Maturity (YTM) is the rate of return anticipated on a bond or other obligation if held to maturity.

Duration is a measure of the sensitivity of the price (the value of principal) of a fixed income investment to a change in interest rates. Duration is expressed as a number of years. Rising interest rates mean falling bond prices, while declining interest rates mean rising bond prices.

Average maturity is the weighted average of the time until all maturities on mortgages in a mortgage-backed security (MBS). The higher the weighted average to maturity, the longer the mortgages in the security have until maturity.

A bond's Average price is calculated by adding its face value to the price paid for it and dividing the sum by two. The average price is sometimes used in determining a bond's yield to maturity where the average price replaces the purchase price in the yield to maturity calculation.

Ratings are based on Moody's, S&P or Fitch, or Kroll for securitized debt instruments only (such as asset-backed securities and mortgage-backed securities), as applicable. If securities are rated differently by the ratings agencies, the highest rating is applied. Ratings, which are subject to change, apply to the creditworthiness of the issuers of the underlying securities and not to the Fund or its shares. Credit ratings measure the quality of an issuance based on the issuer's creditworthiness, with ratings ranging from AAA, being the highest, to D, being the lowest based on S&P's measures. Ratings of BBB or higher by S&P, Fitch or Kroll (Baa or higher by Moody's) are considered to be investment-grade quality. Credit ratings are based largely on the ratings agency's analysis at the time of rating. The rating assigned to any particular security is not necessarily a reflection of the issuer's current financial condition and does not necessarily reflect its assessment of the volatility of a security's market value or of the liquidity of an investment in the security. Holdings designated as “Not Rated” are not rated by the national ratings agencies stated above.

Risk Considerations: Diversification does not eliminate risk of loss. There is no assurance that a portfolio will achieve its investment objective. Portfolios are subject to market risk, which is the possibility that the market values of securities owned by the portfolio will decline and that the value of portfolio shares may therefore be less than what you paid for them. Market values can change daily due to economic and other events (e.g. natural disasters, health crises, terrorism, conflicts and social unrest) that affect markets, countries, companies or governments. It is difficult to predict the timing, duration, and potential adverse effects (e.g. portfolio liquidity) of events. Accordingly, you can lose money investing in this portfolio. Please be aware that this portfolio may be subject to certain additional risks. Fixed-income securities are subject to the ability of an issuer to make timely principal and interest payments (credit risk), changes in interest rates (interest-rate risk), the creditworthiness of the issuer and general market liquidity (market risk). In a rising interest-rate environment, bond prices may fall and may result in periods of volatility and increased portfolio redemptions. In a declining interest-rate environment, the portfolio may generate less income. Longer-term securities may be more sensitive to interest rate changes. Mortgage- and asset-backed securities are sensitive to early prepayment risk and a higher risk of default and may be hard to value and difficult to sell (liquidity risk). They are also subject to credit, market and interest rate risks LIBOR Discontinuance or Unavailability Risk. The regulatory authority that oversees financial services firms and financial markets in the U.K. has announced that, after the end of 2021, it would no longer persuade or compel contributing banks to make rate submissions for purposes of determining the LIBOR rate. As a result, it is possible that commencing in 2022 , LIBOR may no longer be available or no longer deemed an appropriate reference rate upon which to determine the interest rate on or impacting certain derivatives and other instruments or investments comprising some of the Fund's portfolio. U.S. Government securities purchased by the Strategy, such as those issued by Fannie Mae and Freddie Mac, are not backed by the full faith and credit of the U.S. It is possible that these issuers will not have the funds to meet their payment obligations in the future. Preferred Securities. Preferred stock is issued with a fixed par value and pays dividends based on a percentage of that par value at a fixed rate. As with fixed-income securities, which also make fixed payments, the market value of preferred stock is sensitive to changes in interest rates. Preferred stock generally decreases in value if interest rates rise and increases in value if interest rates fall. Municipal securities are subject to early redemption risk and sensitive to tax, legislative and political changes.  Foreign securities are subject to currency, political, economic and market risks. The Fund's investments in foreign securities may be denominated in foreign currencies. The value of foreign currencies may fluctuate relative to the value of the U.S. dollar. Changes in currency exchange rates can increase or decrease the U.S. dollar value of the Fund's assets Restricted and illiquid securities may be more difficult to sell and value than publicly traded securities (liquidity risk). Derivative instruments may disproportionately increase losses and have a significant impact on performance. They also may be subject to counterparty, liquidity, valuation, correlation and market risks. The Portfolio is more susceptible to any economic, business, political, regulatory or other developments that adversely affect issuers in the banking industry than a fund that does not concentrate its investments in the banking industry.  The Portfolio may engage in securities lending (lend its portfolio securities to broker-dealers and other institutional borrowers) to generate income. During the existence of a loan, the Portfolio will continue to receive the equivalent of the interest paid by the issuer, or all or a portion of the interest on investment of the collateral, if any. The Portfolio may pay lending fees to such borrowers. Upon return of the loaned securities, the Portfolio would be required to return the related collateral to the borrower and may be required to liquidate portfolio securities in order to do so. Cash Transactions Risk. Unlike certain ETFs, the Fund may effect creations and redemptions in cash or partially in cash. Therefore, it may be required to sell portfolio securities and subsequently recognize gains on such sales that the Fund might not have recognized if it were to distribute portfolio securities in-kind. As such, investments in Shares may be less tax-efficient than an investment in an ETF that distributes portfolio securities entirely in-kind.  Investing primarily in responsible investments carries the risk that, under certain market conditions, the Portfolio may underperform portfolios that do not utilize a responsible investment strategy. An investment's ESG performance, or Calvert's assessment of such performance may change over time, which could cause the Portfolio to temporarily hold securities that do not comply with the Portfolio's responsible investment criteria. Active Management Risk. In pursuing the Fund's investment objective, the Adviser has considerable leeway in deciding which investments to buy, hold or sell on a day-to-day basis, and which trading strategies to use. The success or failure of such decisions will affect the Fund's performance.

Authorized Participant Concentration Risk. The Portfolio has a limited number of intermediaries that act as authorized participants and none of these authorized participants is or will be obligated to engage in creation or redemption transactions. As a result, shares may trade at a discount to net asset value (“NAV”) and possibly face trading halts and/or delisting. Trading Risk. The market prices of Shares are expected to fluctuate, in some cases materially, in response to changes in the Portfolio's NAV, the intra-day value of holdings, and supply and demand for Shares. The Adviser cannot predict whether Shares will trade above, below or at their NAV. Buying or selling Shares in the secondary market may require paying brokerage commissions or other charges imposed by brokers as determined by that broker. New Fund Risk. A new portfolio's performance may not represent how the portfolio is expected to or may perform in the long term. In addition, there is a limited operating history for investors to evaluate and the portfolio may not attract sufficient assets to achieve investment and trading efficiencies.    

The index is unmanaged and does not include any expenses, fees or sales charges. It is not possible to invest directly in an index. Any index referred to herein is the intellectual property (including registered trademarks) of the applicable licensor.

This material is a general communication, which is not impartial and all information provided has been prepared solely for informational and educational purposes and does not constitute an offer or a recommendation to buy or sell any particular security or to adopt any specific investment strategy. The information herein has not been based on a consideration of any individual investor circumstances and is not investment advice, nor should it be construed in any way as tax, accounting, legal or regulatory advice. To that end, investors should seek independent legal and financial advice, including advice as to tax consequences, before making any investment decision. 

Calvert ETFs are distributed by Foreside Fund Services, LLC.

Before investing carefully consider the Fund's objective, risks, charges and expenses available in the Prospectus. Read carefully.