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.

See the Fund's prospectus for information related to a primary benchmark index selected (if applicable) to comply with a regulation that requires the Fund's primary benchmark to represent the overall applicable market.

¹ Calvert US Mid-Cap Core Responsible Index is a portfolio of mid capitalization U.S. stocks that meet Calvert’s criteria for index inclusion based on Calvert Principles for Responsible Investment. 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.

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 Russell Midcap® Index is an unmanaged index of U.S. mid-cap stocks. 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:

Weighted Average Market Capitalization is an average of the market capitalization of stocks comprising a portfolio or index, adjusted by each stock’s weight in the portfolio or index.

Price-Earnings (P/E) is the price of a stock divided by its earnings per share for the past 12 months. Sometimes called the multiple, P/E gives investors an idea of how much they are paying for a company’s earning power. The higher the P/E, the more investors are paying, and therefore the more earnings growth they are expecting.

Price-To-Book Ratio (Price/Book) compares a stock’s market value to the book value per share of total assets less total liabilities. This number is used to judge whether a stock is undervalued or overvalued.

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.

Distribution Rate is the annual yield an investor would receive if the most recent fund distribution remained the same going forward. The distribution yield is calculated by dividing the normalized current distribution (annualized) by the fund NAV per share.

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. In general, equities securities' values fluctuate in response to activities specific to a company. 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. The value of the Portfolio may be particularly impacted by events that adversely affect the information technology sector, such as rapid changes in technology product cycles, product obsolescence, government regulation, and competition, and may fluctuate more than that of a portfolio that does not concentrate in companies in the technology sector. 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. Please be aware that this portfolio may be subject to certain additional risks. 

Tracking error risk refers to the risk that the Portfolio's performance may not match or correlate to that of the Index it attempts to track, either on a daily or aggregate basis, and may cause the performance to be less than expected. Because a representative sampling indexing strategy is utilized, a larger tracking error can be expected than if it used a replication indexing strategy. Tracking error may also occur because of other factors, including but not limited to, transaction costs and the holding of cash. Index Related Risk. The return may not track the return of the Index and therefore may not achieve its investment objective. In addition, the Portfolio can be expected to be less correlated with the return of the index. The Portfolio is managed using a passive investment strategy and generally will not adjust its portfolio investments to attempt to take advantage of market opportunities or lessen the impact of a market decline or a decline in the performance of one or more issuers or for other reasons, which could negatively impact the portfolio than if the Portfolio employed an active strategy. 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. Concentration Risk. The Portfolio may face greater risks if the Portfolio concentrates its investments in an industry or group of industries than if it were diversified broadly. 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.