Document



SUMMARY PROSPECTUS
February 1, 2016, as revised June 24, 2016
CALVERT DEVELOPED MARKETS EX-U.S. RESPONSIBLE INDEX FUND
Class (Ticker):	I (CDHIX)
Link to Prospectus (Table of Contents)		Link to Statement of Additional Information (Table of Contents)

Before you invest, you may want to review the Fund's Prospectus, which contains more information about the Fund and its risks. The Fund's Prospectus and Statement of Additional Information (the "SAI"), both dated February 1, 2016, are incorporated by reference into this Summary Prospectus. You can find the Fund's Prospectus, the SAI, and other information about the Fund online at www.calvert.com/prospectus. You can also get this information at no cost by calling 1-800-327-2109 or by sending an e-mail request to Prospectusrequest@calvert.com, or by asking a financial professional who offers shares of the Fund.

INVESTMENT OBJECTIVE

The Fund seeks to track the performance of the Calvert Developed Markets Ex-U.S. Responsible Index, which measures the investment return of stocks issued by companies that are located in countries (other than the U.S.) with developed markets.

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 that you pay each year as a % of the value of your investment)
Management fees¹	0.27%
Distribution and service (12b-1) fees	None
Other expenses²	1.11%
Total annual fund operating expenses	1.38%
Less fee waiver and/or expense reimbursement³	(1.11%)
Total annual fund operating expenses after fee waiver and/or expense reimbursement	0.27%

¹Management fees are restated to reflect current contractual fees rather than the fees paid during the previous fiscal year.

²“Other expenses” are based on estimated amounts for the current fiscal year. Actual expenses may differ from estimates.

³The investment advisor has agreed to contractually limit direct net annual fund operating expenses to 0.27% through January 31, 2017. Only the Board of Directors of the Fund may terminate the Fund’s expense limitation before the contractual period expires, upon 60 days’ prior notice to shareholders. The contractual administrative fee is 0.12%. Calvert has agreed to contractually waive 0.12% of the administrative fee through January 31, 2018.

Example

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that:


•	you invest $100,000 in the Fund for the time periods indicated;


•	your investment has a 5% return each year;


•	the Fund’s operating expenses remain the same; and


•	any Calvert expense limitation is in effect for the period indicated in the fee table above.

Although your actual costs may be higher or lower, under these assumptions your costs would be:



1 Year	3 Years
$399	$3,523

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (“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. The Fund’s portfolio turnover is not available because the Fund has not been operating for one year.

INVESTMENTS, RISKS AND PERFORMANCE

Principal Investment Strategies

The Fund employs a passive management strategy designed to track, as closely as possible, the performance of the Calvert Developed Markets Ex-U.S. Responsible Index (the “Index”). The Fund uses a replication index method, investing in the common stock of each company in the Index in approximately the same proportion as represented in the Index itself. The Fund will normally invest at least 95% of its net assets, including borrowings for investment purposes, in securities contained in the Index. The Fund will provide shareholders with at least 60 days’ notice before changing this policy.

Calvert Developed Markets Ex-U.S. Responsible Index. The Calvert Developed Markets Ex-U.S. Responsible Index is composed of companies that operate their businesses in a manner that is consistent with Calvert’s responsible investment principles and are selected from the universe of companies included in the S-Network Developed International 1000 Index. The S-Network Developed International 1000 Index is a capitalization-weighted, float-adjusted equity index designed to

SUMMARY PROSPECTUS FEBRUARY 1, 2016 1

serve as an equity benchmark for stocks of companies located in major markets in Europe, the Pacific, Asia and Canada. As of December 31, 2015, the Calvert Developed Markets Ex-U.S. Responsible Index included 668 companies, and the market capitalization ranged from $1.4 billion to $235.1 billion with a weighted average market capitalization of $47.3 billion. The number of companies in the Index will change over time due to company mergers or changes resulting from Calvert’s evaluation of an issuer’s conduct relative to the responsible investment principles. The Index is reconstituted semi-annually based on an updated list of companies in the S-Network Developed International 1000 Index and is rebalanced quarterly.

The Fund may enter into foreign currency transactions in the course of purchasing and selling foreign currency denominated securities in order to track, as closely as possible, the performance of the Calvert Developed Markets Ex-U.S. Responsible Index.

Indexing. An index is a group of securities whose overall performance is used as a standard to measure investment performance. An index (or “passively managed”) fund tries to match, as closely as possible, the performance of an established target index. An index fund’s goal is to mirror the target index whether the index is going up or down. Therefore, index funds do not need the costly research and analysis employed by active fundamental asset managers. To track its target index as closely as possible, the Fund attempts to remain fully invested in stocks. To help stay fully invested, and to reduce transaction costs, the Fund may invest to a limited extent in stock futures contracts, or other registered investment companies.

The Fund uses a replication method of indexing. If assets should ever decline to below $5 million, it may use the sampling method. The replication method involves holding every security in the Calvert Developed Markets Ex-U.S. Responsible Index in about the same proportion as the Index. The sampling method involves selecting a representative number of securities that will resemble the Index in terms of key risk and other characteristics.

Although index funds by their nature tend to be tax-efficient investment vehicles, the Fund generally is managed without regard to tax ramifications.

Responsible Investing. In conjunction with Calvert’s financial analysis, Calvert’s comprehensive responsible investment principles guide our investment research processes and decision-making. The principles, which include the Advisor’s proprietary assessment of critical environmental, social and governance (“ESG”) issues, are applied across industries and to specific companies in order to inform our view of risk and opportunity factors that may affect investment performance.

Principal Risks

You could lose money on your investment in the Fund, or the Fund could underperform, because of the risks described below. An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

Index Tracking Risk. An index fund has operating expenses; a market index does not. Although expected to track its target

index as closely as possible while satisfying its investment criteria, including financial and responsible investing factors, the Fund will not be able to match the performance of the index exactly.

Stock Market Risk. The market prices of stocks held by the Fund may fall.

Common Stock Risk. Although common stocks have a history of long-term growth in value, their prices fluctuate based on changes in a company’s financial condition, on overall market and economic conditions, and on investors’ perception of a company’s well-being.

Large-Cap Company Risk. Large-cap companies may be unable to respond quickly to new competitive challenges such as changes in technology, and also may not be able to attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion.

Mid-Cap Company Risk. Prices of mid-cap stocks can be more volatile than those of larger, more established companies. Mid-cap companies are more likely to have more limited product lines, fewer capital resources and less depth of management than larger companies.

Foreign Securities Risk. Investing in foreign securities involves additional risks relating to political, social, and economic developments abroad. Other risks result from the differences between the regulations to which U.S. and foreign issuers and markets are subject, and the potential for foreign markets to be less liquid and more volatile than U.S. markets. Foreign securities include ADRs. Unsponsored ADRs involve additional risks because U.S. reporting requirements do not apply and the issuing bank will recover shareholder distribution costs from movement of share prices and payment of dividends.

Foreign Currency Risk. Securities that trade or are denominated in currencies other than the U.S. dollar may be adversely affected by fluctuations in currency exchange rates. When the U.S. dollar strengthens relative to a foreign currency, the U.S. dollar value of an investment denominated in that currency will typically fall. ADRs indirectly bear currency risk because they represent an interest in securities that are not denominated in U.S. dollars.

Foreign Currency Hedge Derivatives Risk. Transactions in foreign currency and foreign currency derivatives in connection with the purchase and sale of investments in foreign markets may result in foreign currency exposure and the potential for losses due to fluctuations in currency exchange rates without regard to the quality or performance of the investment itself. The use of foreign currency and foreign currency derivatives may also prevent the Fund from realizing profits on favorable movements in exchange rates. In addition, the value of a foreign currency derivative may not correlate to the value of the underlying foreign currency to the extent expected. Derivative instruments are subject to a number of risks, including the risk of changes in the market price of the underlying asset, credit risk with respect to the counterparty, and liquidity risk. The Fund’s use of certain derivatives may also have a leveraging effect, which may increase the volatility of and reduce the Fund’s returns or result in a loss that exceeds the value of the

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assets allocated to establish and maintain a position in the derivative instrument.

Futures Contracts Risk. The value of a futures contract tends to increase and decrease in tandem with the value of the underlying instrument. The price of futures can be highly volatile; using them could lower total return, and the potential loss from futures can exceed the Fund’s initial investment in such contracts. Futures contracts may not provide an effective hedge of the underlying securities or indexes because changes in the prices of futures contracts may not track those of the securities or indexes that they are intended to hedge.

Investments in Other Investment Companies. The risks of investing in other investment companies typically reflect the risks of the types of securities in which those investment companies invest. When the Fund invests in another investment company, shareholders of the Fund bear their proportionate share of the other investment company’s fees and expenses as well as their share of the Fund’s fees and expenses.

Responsible Investing Risk. Investing primarily in responsible investments carries the risk that, under certain market conditions, the Fund may underperform funds that do not utilize a responsible investment strategy. The application of responsible investment principles may affect the Fund’s exposure to certain sectors or types of investments and may impact the Fund’s relative investment performance depending on whether such sectors or investments are in or out of favor in the market. A company’s ESG performance or the Advisor’s assessment of a company’s ESG performance may change over time, which could cause the Fund to temporarily hold securities that do not comply with the Fund’s responsible investment principles. In evaluating a company, the Advisor is dependent upon information and data that may be incomplete, inaccurate or unavailable, which could cause the Advisor to incorrectly assess a company’s ESG performance. Successful application of the Fund’s responsible investment strategy will depend on the Advisor’s skill in properly identifying and analyzing material ESG issues.

Performance

Because the Fund has less than a full calendar year of investment operations, no performance information is presented for the Fund at this time.

PORTFOLIO MANAGEMENT

Investment Advisor. Calvert Investment Management, Inc. (“Calvert” or the “Advisor”)

The following individuals, who are members of the Calvert Investment and Performance Systems Department, jointly manage the Fund on a day-to-day basis:



Portfolio Manager Name	Title	Length of Time Managing Fund
Laurie Webster, CFA	Vice President - Investment Operations and Indexing	Since October 2015
Dale R. Stout	Index Portfolio Manager and Senior Analyst	Since June 2016
Lise Bernhard	Director of Investment Operations and Performance	Since October 2015

BUYING AND SELLING SHARES

You can buy, sell (redeem) or exchange shares of a Fund, either through a financial professional or directly from the Fund, on any day that the New York Stock Exchange is open. The share price is based on the Fund’s net asset value determined after receipt of your request in good order. To purchase shares directly from the Fund, open an account by completing and signing an application (available at www.calvert.com or by calling 800-368-2748).

All initial purchases must be made by bankwire or ACH funds transfer (each an “electronic funds transfer”) in U.S. dollars.

Minimum to Open Fund Account

$100,000

Waiver for Retirement Plan Omnibus Accounts. The initial investment minimum is waived for retirement plans that trade through omnibus accounts.

The Fund may waive the initial investment minimum for certain institutional accounts where it is believed to be in the best interest of the Fund and its shareholders.

To Buy Shares

New Accounts (include application) and Subsequent Investments: For wire instructions, call 800-327-2109.

To Sell Shares

Shares may be sold by telephone. Call 800-368-2745.

TAX INFORMATION

Unless you are investing through a tax-deferred arrangement, such as a 401(k) plan or an individual retirement account, any dividends and distributions made by the Fund are taxable to you as ordinary income or capital gains and may also be subject to state and local taxes.

SUMMARY PROSPECTUS FEBRUARY 1, 2016 3

PAYMENTS TO BROKER/DEALERS AND OTHER FINANCIAL INTERMEDIARIES

If you purchase shares of the Fund through a broker/dealer or other financial intermediary (such as a bank), 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 Web site for more information.

Investment Company Act file:

No. 811-09877 Calvert Responsible Index Series, Inc.



Link to Prospectus (Table of Contents)	Link to Statement of Additional Information (Table of Contents)

4 SUMMARY PROSPECTUS FEBRUARY 1, 2016