CALVERT SOCIAL INVESTMENT FUND
485BPOS, 1998-01-23
Previous: HERITAGE FINANCIAL SERVICES INC /IL/, SC 13D, 1998-01-23
Next: FEDERATED STOCK TRUST, 24F-2NT, 1998-01-23



SEC Registration Nos.
2-75106 and 811-3334

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM N-1A

REGISTRATION STATEMENT UNDER THE
SECURITIES ACT OF 1933

Post-Effective Amendment No. 25            XX

and/or

REGISTRATION STATEMENT UNDER THE
INVESTMENT COMPANY ACT OF 1940

Amendment No. 25                                    XX

Calvert Social Investment Fund
(Exact Name of Registrant as Specified in Charter)

4550 Montgomery Avenue
Suite 1000N
Bethesda, Maryland 20814
(Address of Principal Executive Offices)

Registrant's Telephone Number: (301) 951-4800

William M. Tartikoff, Esq.
4550 Montgomery Avenue
Suite 1000N
Bethesda, Maryland 20814
(Name and Address of Agent for Service)

It is proposed that this filing will become effective


___ Immediately upon filing                        XX on January 31, 1998
pursuant to paragraph (b)                          pursuant to paragraph (b)

___ 60 days after filing                           on (date)
pursuant to paragraph (a)                          pursuant to paragraph (a)

of Rule 485.

<PAGE>

Calvert Social Investment Fund
Form N-1A Cross Reference Sheet

Item number                         Prospectus Caption

         1.                         Cover Page
         2.                         Fund Expenses
                                    Highlights
         3.                         Financial Highlights
                                    Yield and Total Return
         4.                         Investment Objectives and Policies
                                    Investment Selection Process
                                    Additional Investment Policies
                                    Management of the Fund
         5.                         Management of the Fund
         6.                         Alternative Sales Options
                                    Management of the Fund
                                    Dividends and Taxes
         7.                          How to Buy Shares
                                    Management of the Fund
                                    Net Asset Value
                                    Exhibit A - Reduced Sales Charges
                                    When Your Account Will Be Credited
                                    Exchanges
         8.                         Alternative Sales Options
                                    How to Sell Your Shares
         9.                         *

                             Statement of Additional Information Caption

         10.                        Cover Page
         11.                        Table of Contents
         12.                        General Information
         13                         Investment Objectives and Policies
                                    Investment Restrictions
                                    Investment Selection Process
         14.                        Trustees, Officers and Advisory Council
         15.                        Trustees, Officers and Advisory Council
         16.                        Investment Advisor
                                    Transfer and Shareholder Servicing Agent
                                    Independent Auditors and Custodians
         17.                        Portfolio Transactions
         18.                        General Information
         19.                        Purchase and Redemption of Shares
                                    Net Asset Value
         20.                        Dividends, Distributions and Taxes
         21.                        Method of Distribution
         22.                        Calculation of Yield and Total Return
         23.                        Financial Statements

*  Inapplicable or negative answer

<PAGE>

   
PROSPECTUS January 31, 1998
    

Calvert Social Investment Fund
o   MONEY MARKET PORTFOLIO                        o BOND PORTFOLIO
o   MANAGED GROWTH PORTFOLIO                      o EQUITY PORTFOLIO

Calvert World Values Fund, Inc.
o INTERNATIONAL EQUITY FUND

4550 MONTGOMERY AVENUE, BETHESDA, MARYLAND 20814

   
Introduction to the Funds
Calvert Social Investment Fund ("CSIF") and Calvert World Values Fund ("CWVF")
International Equity Fund (each a "Fund" and together, the "Funds") each seek
to provide growth of capital or current income through investment in
enterprises that make a significant contribution to society through their
products and services and through the way they do business. See "Investment
Objectives and Policies." Investments are selected on the basis of their
ability to contribute to the dual objectives of the Funds. Potential
investments are first selected for financial soundness and then evaluated
according to a particular Fund's social criteria.
    

Five different Portfolios are offered:

 CSIF Managed Growth Portfolio (a balanced fund)
 CSIF Bond Portfolio
 CSIF Equity Portfolio
 CSIF Money Market Portfolio
 CWVF International Equity Fund

An investment in a Fund is neither insured nor guaranteed by the US
Government. There can be no assurance that the CSIF Money Market Portfolio
will be successful in maintaining a constant net asset value of $1.00 per
share.


About This Prospectus
Please read this Prospectus before investing. It is designed to provide you
with information you ought to know before investing and to help you decide if
the Funds' goals match your own. Keep this document for future reference.

   
Statements of Additional Information for the Funds (dated January 31, 1998)
have been filed with the Securities and Exchange Commission and are
incorporated by reference. These free Statements are available upon request:
800-368-2748.
    

The SEC maintains a Web site at http://www.sec.gov that contains the
Statements of Additional Information, material incorporated by reference, and
other information regarding the Funds.


THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION, NOR HAS THE FEDERAL OR
ANY STATE SECURITIES COMMISSION PASSED ON THE ACCURACY OR ADEQUACY OF THIS
PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.

SHARES OF A FUND ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED OR ENDORSED
BY, ANY BANK, AND ARE NOT FEDERALLY INSURED BY THE FDIC, THE FEDERAL RESERVE
BOARD, OR ANY OTHER AGENCY. WHEN INVESTORS SELL SHARES OF A FUND, THE VALUE
MAY BE HIGHER OR LOWER THAN THE AMOUNT ORIGINALLY PAID.

Purchase Information
CSIF Managed Growth and Equity Portfolios and CWVF International Equity Fund
offer two classes of shares, each with different expense levels and sales
charges. You may choose to purchase (i) Class A shares, with a sales charge
imposed at the time you purchase the shares ("front-end sales charge"), or
(ii) Class C shares which impose neither a front-end sales charge nor a
contingent deferred sales charge. Class C shares are not available through all
brokers. Class C shares have a higher level of expenses than Class A shares,
including higher Rule 12b-1 fees. These alternatives permit you to choose the
method of purchasing shares that is most beneficial to you, depending on the
amount of the purchase, the length of time you expect to hold the shares, and
other circumstances. CSIF Bond Portfolio only offers Class A shares with a
front-end sales charge. See "Alternative Sales Options" for further details.

To Open An Account
Call your broker, or complete and return the enclosed Account Application.
Minimum investment is $1,000 for CSIF, and $2,000 for CWVF.

Highlights

INVESTMENT OBJECTIVES AND POLICIES

The Funds are designed to provide opportunities for investors seeking growth
of capital or current income through investment in enterprises that make a
significant contribution to society through their products and services and
through the way they do business.

CSIF Money Market Portfolio seeks to provide the highest level of current
income, consistent with liquidity, safety and stability, through investment in
money market instruments, including securities issued or guaranteed by
agencies of the US Government and repurchase agreements with banks and brokers
secured by such instruments, selected in accordance with the Fund's investment
and social criteria. The Money Market Portfolio is designed for short-term
cash management and for investors needing stability of principal. The Money
Market Portfolio seeks to maintain a constant net asset value of $1.00 per
share.

CSIF Managed Growth Portfolio is a balanced fund which seeks to achieve a
total return above the rate of inflation through an actively managed,
diversified portfolio of common and preferred stocks, bonds and money market
instruments which offer income and capital growth opportunity and which
satisfy the investment and social concern criteria.

CSIF Bond Portfolio seeks to provide as high a level of current income as is
consistent with prudent investment risk and preservation of capital through
investment in bonds and other straight debt securities, selected pursuant to
the Fund's investment and social criteria.

CSIF Equity Portfolio seeks growth of capital through investment in the equity
securities of issuers within industries perceived to offer opportunities for
potential capital appreciation and which satisfy the Fund's investment and
social criteria.

CWVF International Equity Fund seeks to achieve a high total return consistent
with reasonable risk, by investing primarily in a globally diversified
portfolio of equity securities.
There can be no assurance that the Funds will be successful in meeting their
investment objectives. For a further description of the Funds and discussion
of the Funds' investment techniques, see "Investment Objectives and Policies,"
"Investment Selection Process" and "Additional Investment Policies."

Expertise in the Management of the Funds

   
The Funds' Investment Advisor is Calvert Asset Management Company, Inc.
("CAMCO"), a subsidiary of Acacia Mutual Life Insurance Company of Washington,
D.C. CAMCO manages the CSIF Money Market Portfolio, CSIF Bond Portfolio, and
the fixed-income assets of the CSIF Managed Growth Portfolio. Investment
Subadvisors for the equity assets of the CSIF Managed Growth Portfolio are NCM
Capital Management Group, Inc. and Brown Capital Management, Inc. Loomis,
Sayles & Company, L.P. ("Loomis, Sayles") is the Subadvisor to the CSIF Equity
Portfolio, and Murray Johnstone International, Ltd., is the Subadvisor for the
CWVF International Equity Fund.
    

DIVERSIFICATION OF INVESTMENTS AND RISKS

By pooling the investments of many investors with similar investment
objectives, investors have an opportunity to benefit from a broadly
diversified portfolio. For a discussion of the risks which may be associated
with investments in repurchase and reverse repurchase agreements, privately
placed securities, non-investment grade debt securities, the securities of
foreign issuers, and options and futures contracts, see "Additional Investment
Policies" and the Statements of Additional Information.


PURCHASE OF FUND SHARES

There is no sales charge on shares of the CSIF Money Market Portfolio. Class A
shares of the CSIF Managed Growth, Bond, and Equity Portfolios and the CWVF
International Equity Fund are sold subject to a front-end sales charge which
varies according to the dollar amount of shares purchased (see "How to Buy
Shares").

Purchases of shares of the Funds may be made by mail, bank wire, electronic
funds transfer, through the Funds' branch office or through brokers. (See "How
to Buy Shares.")

REDEMPTION OF FUND SHARES

Shares of each Portfolio may be redeemed at any time at no charge at the net
asset value next determined after a proper redemption request is received by
the transfer agent. Investors may redeem shares by mail or by telephone,
through brokers, or, for investors in the CSIF Money Market Portfolio, by
writing drafts in the amount of $250 or more against their account balances.
(See "How to Sell Your Shares.")

GENERAL INFORMATION

   
CSIF is an open-end, diversified management investment company organized as a
Massachusetts business trust under a Declaration of Trust dated December 14,
1981, and is a series company. The Money Market and Managed Growth Portfolios
commenced operations in October 1982, and the Bond and Equity Portfolios
commenced operations in August 1987. CSIF's authorized capital and shares
being offered by this Prospectus consist of an unlimited number of shares of
beneficial interest of no par value which may be issued in series and classes.
Shares have equal rights with all other shares of the same class and series as
to voting, dividends and liquidation.
    

CWVF is an open-end diversified management investment company organized as a
Maryland corporation on February 14, 1992. Prior to June 1, 1996, the
International Equity Fund operated under the name of Calvert World Values
Global Equity Fund. The other series of Calvert World Values Fund, Inc. is
Calvert Capital Accumulation Fund.

FUND EXPENSES

                           CSIF Money                CSIF Managed
A. Shareholder             Market Portfolio          Growth Portfolio
  Transaction Costs        Class A                   Class A      Class C

  Maximum Sales
Charge on Purchases
(as a percentage of
offering price)            None                      4.75%        None

  Contingent Deferred
Sales Charge               None                      None         None

B.       Annual Fund Operating Expenses - Fiscal Year 1997
         (as a percentage of average net assets)

  Management Fees          0.50%                     0.60%        0.60%
  Rule 12b-1 Service and
  Distribution Fees        0.00%                     0.24%        1.00%
  Other Expenses
  (after expense
reimbursement)             0.39%                     0.30%        0.69%
  Total Fund
Operating Expenses1        0.89%                     1.14%        2.29%

                           CSIF Bond                 CSIF Equity
A. Shareholder             Portfolio                 Portfolio
Transaction Costs          Class A                   Class A      Class C

Maximum Sales
Charge on Purchases
(as a percentage of
offering price)             3.75%                    4.75%        None
 
Contingent Deferred
Sales Charge                None                     None         None

B.       Annual Fund Operating Expenses - Fiscal Year 1997
         (as a percentage of average net assets)

   Management Fees          0.55%                    0.55%        0.55%
   Rule 12b-1 Service
   and Distribution Fees    0.20%                    0.23%        1.00%
   Other Expenses           0.44%                    0.43%        0.76%
   Total Fund
   Operating Expenses1      1.19%                    1.21%        2.31%


                                                     CWVF International
A. Shareholder                                       Equity Fund
    Transaction Costs                                Class A      Class C

   Maximum Sales Charge on Purchases
    (as a percentage of offering price)              4.75%        None
   Contingent Deferred Sales Charge                  None         None

B.       Annual Fund Operating Expenses - Fiscal Year 1997
         (as a percentage of average net assets)

   Management Fees                                   1.10%        1.10%
   Rule 12b-1 Service and Distribution Fees          0.25%        1.00%
   Other Expenses                                    0.56%        0.81%
   Total Fund Operating Expenses1                    1.91%        2.91%

C.       Example
         You would pay the following expenses on a $1,000 investment, assuming
(1) 5% annual return; (2) redemption at the end of each period; and (3) for
all Portfolios except the CSIF Money Market Portfolio, payment of maximum
initial sales charge for Class A shares at time of purchase:

              1 YEAR           3 YEARS           5 YEARS          10 YEARS


CSIF MONEY MARKET PORTFOLIO
              $9               $28               $49              $110

CSIF MANAGED GROWTH PORTFOLIO
Class A       $59              $82               $107             $180
Class C       $23              $72               $123             $263

CSIF BOND PORTFOLIO
Class A       $49              $74               $100             $176

CSIF EQUITY PORTFOLIO
Class A       $59              $84               $111             $187
Class C       $23              $72               $124             $265

CWVF INTERNATIONAL EQUITY FUND
Class A       $66              $105              $146             $260
Class C       $29              $90               $153             $323

The example, which is hypothetical, should not be considered a representation
of past or future expenses. Actual expenses and return may be higher or lower
than those shown.

Explanation of Table: The purpose of the table is to assist you in
understanding the various costs and expenses that an investor may bear
directly (shareholder transaction costs) or indirectly (annual fund operating
expenses).

   
1. Net Operating Expenses after reduction for fees paid indirectly were:
CSIF Money Market - 0.87%             CSIF Equity, A - 1.20%
CSIF Managed Growth - A 1.12%         CSIF Equity, C - 2.30%
CSIF Managed Growth - C 2.27%         CWVF International Equity, A - 1.76%
CSIF Bond - 1.15%                     CWVF International Equity, C - 2.76%
    

Shareholder Transaction Costs
are charges you pay when you buy or sell shares. See "Reduced Sales Charges"
at Exhibit A to see if you qualify for possible reductions in the sales
charge. If you request a wire redemption of less than $1,000, you will be
charged a $5 wire fee.

   
Annual Fund Operating Expenses
are based on historical expenses. Management fees for CSIF Bond have been
restated to reflect a partial waiver of the fees, in effect until 2/29/2000.
Management Fees are paid by each Fund to CAMCO for managing the Funds'
investments and business affairs. Management fees include the Subadvisory fees
paid by CAMCO to the Subadvisors, and, for CWVF International Equity Fund, the
administrative fee paid by the Fund to Calvert Administrative Services
Company, an affiliate of CAMCO. The Management Fees for the CSIF Equity
Portfolio include a performance adjustment, which could cause the fee to be as
high as 0.90% or as low as 0.50%, depending on the Equity Portfolio's
performance. The Management fees for the CSIF Managed Growth Portfolio include
a performance adjustment which could cause the fee to be as high as 0.85% or
as low as 0.55%, depending on its performance. The Funds incur Other Expenses
for maintaining shareholder records, furnishing shareholder statements and
reports, and other services. Management Fees and Other Expenses have already
been reflected in each Fund's yield or share price and are not charged
directly to individual shareholder accounts.

If CAMCO had not reimbursed or waived fees, the current Other Expenses and
Total Fund Operating Expenses for the CSIF Money Market Portfolio would have
been 0.50% and 1.00%, respectively.
    

The Funds' Rule 12b-1 fees include an asset-based sales charge. Thus,
long-term shareholders in a Fund may pay more in total sales charges than the
economic equivalent of the maximum front-end sales charge permitted by rules
of the National Association of Securities Dealers, Inc. (the "NASD"). In
addition to the compensation itemized above (sales charge and Rule 12b-1
service and distribution fees), certain broker/dealers and/or their
salespersons may receive compensation for the sale and distribution of the
securities or for services to the Funds. See the Statements of Additional
Information, "Method of Distribution."

FINANCIAL HIGHLIGHTS

The following tables provide information about the financial history of each
Fund's shares. They express the information in terms of a single share
outstanding for the respective Portfolio throughout each period. Information
for Class C shares is presented only since their inception on March 1, 1994.
The tables have been audited by the independent accountants, whose reports are
included in the Annual Reports to Shareholders of the Fund. The tables should
be read in conjunction with the financial statements and their related notes.
The current Annual Reports to Shareholders are incorporated by reference into
the Statements of Additional Information.

                                        Year Ended September 30,
CSIF MONEY MARKET PORTFOLIO             1997         1996         1995

Net asset value, beginning of year      $1.00        $1.00        $1.00
Income from investment operations
     Net investment income              0.48         .048         .050
Distributions from
     Net investment income              (0.48)       (.048)       (.050)
Net asset value, end of year            $1.00        $1.00        $1.00
Total return*                           4.89%        4.88%        5.13%
Ratio to average net assets:
     Net investment income              4.79%        4.77%        5.03%
     Total expenses**                   .89%         .89%         .89%
     Net expenses                       .87%         .87%         .87%
     Expenses reimbursed and/or waived  .11%         .21%         .18%
Net assets, end of year (in thousands)  $166,111     $166,516     $153,996
Number of shares outstanding
at end of year (in thousands)           166,163      166,569      154,044

                                        YEAR ENDED SEPTEMBER 30,
CSIF MONEY MARKET PORTFOLIO             1994         1993         1992

Net asset value, beginning of year      $1.00        $1.00        $1.00
Income from investment operations
     Net investment income              .031         .025         .037
Distributions from
     Net investment income              (.031)       (.025)       (.037)
Net asset value, end of year            $1.00        $1.00        $1.00
Total return*                           3.13%        2.56%        3.79%
Ratio to average net assets:
     Net investment income              3.07%        2.54%        3.74%
     Total expenses**                   N/A          N/A          N/A
     Net expenses                       .87%         .87%         .87%
     Expenses reimbursed and/or waived  .18%         .20%         .16%
Net assets, end of year (in thousands)  $143,779     $144,985     $171,340
Number of shares outstanding
at end of year (in thousands)           143,826      145,031      171,407

         *Total return prior to 1989 is not audited.
         **Effective September 30, 1995, this ratio reflects total expenses
before reduction for fees paid indirectly; such reductions are included in the
ratio of net expenses.
         N/A - Disclosure not applicable to prior periods.

                                    Year Ended September 30,
CSIF Money Market Portfolio         1991       1990       1989       1988
Net asset value, beginning of year  $1.00      $1.00      $1.00      $1.00
Income from investment operations
     Net investment income          .061       .076       .084       .067
Distributions from
     Net investment income          (.061)     (.076)     (.084)     (.067)
Net asset value, end of year        $1.00      $1.00      $1.00      $1.00
Total return*                       6.32%      7.85%      6.47%      5.31%
Ratio to average net assets:
     Net investment income          6.12%      7.53%      8.40%      6.47%
     Total expenses**               N/A        N/A        N/A        N/A
     Net expenses                   .87%       .85%       .85%       .84%
     Expenses reimbursed 
     &/or waived                    .13%        .14%        .17%     .27%
Net assets, end of year 
 (in thousands)                     $193,947   $182,148   $139,662  $81,253
Number of shares outstanding
at end of year (in thousands)       194,015    182,193    139,707    81,278


Class A Shares                      Year Ended September 30,
CSIF Managed Growth Portfolio       1997       1996       1995       1994
Net asset value, beginning of year  $31.35     $32.81     $28.77     $30.84
Income from investment operations
     Net investment income          .83        .78        .87        .93
     Net realized and unrealized
     gain (loss) on investment      5.61       2.28       4.25       (1.83)
       Total from investment
        operations                  6.44       3.06       5.12       (.90)
Distributions from
     Net investment income          (.81)      (.77)      (.87)      (.95)
     Net realized gains             (2.10)     (3.75)     (.21)      (.23)
       Total distributions          (2.91)     (4.52)     (1.08)     (1.18)
Total increase (decrease)
  in asset value                    3.53       (1.46)     4.04       (20.8)
Net asset value, end of year        $34.88     $31.35     $32.81     $28.77
Total return*                       21.94%     10.27%     18.21%     (2.95)%
Ratio to average net assets:
     Net investment income          2.57%      2.58%      2.89%      3.14%
     Total expenses**               1.14%      1.28%      1.28%      N/A
     Net expenses                   1.12%      1.26%      1.26%      1.24%
     Expenses reimbursed 
       &/or waived                  -         .01%       .02%        -
     Portfolio turnover             215%       111%       114%       34%
Average commission rate paid        $.0508     $.0489     N/A        N/A
Net assets, end of year 
 (in thousands)                    $675,306   $594,482   $560,981   $512,027
Number of shares outstanding
at end of year (in thousands)       19,362     18,964     17,099     17,800


Class A Shares                      Year Ended September 30,
CSIF Managed Growth Portfolio       1993         1992         1991
Net asset value, beginning of year  $29.35       $28.42       $25.87
Income from investment operations
     Net investment income          .95          1.07         1.20
     Net realized and unrealized
     gain (loss) on investment      1.91         1.82         3.10
       Total from investment 
          operations                2.86         2.89         4.30
Distributions from
     Net investment income          (.95)        (1.95)       (1.00)
     Net realized gains             (.41)        (.01)        (.75)
       Total distributions          (1.36)       (1.96)       (1.75)
Total increase (decrease) 
  in asset value                    1.50         .93          2.55
Net asset value, end of year        $30.85       $29.35       $28.42
Total return*                       9.98%        10.71%       17.51%
Ratio to average net assets:
     Net investment income          3.25%        3.90%        4.73%
     Total expenses**               N/A          N/A          N/A
     Net expenses                   1.25%        1.28%        1.31%
     Expenses reimbursed 
      and/or waived                 -            -            -
Portfolio turnover                  33%          14%          25%
Average commission rate paid        N/A          N/A          N/A
Net assets, end of year 
  (in thousands)                    $536,170     $419,514     $329,922
Number of shares outstanding
at end of year (in thousands)       17,378       14,292       11,609


Class A Shares                      Year Ended September 30,
CSIF Managed Growth Portfolio       1990         1989           1988
Net asset value, beginning of year  $27.72       $25.04         $27.44
Income from investment operations
     Net investment income          1.09         1.15           1.09
     Net realized and unrealized
     gain (loss) on investment      (1.85)       2.97           (1.91)
       Total from investment
          operations                (.76)        4.12           (.82)
Distributions from 
     Net investment income          (.63)        (.98)          (1.08)
     Net realized gains             (.46)        (.46)          (.50)
       Total distributions          (1.09)       (1.44)         (1.58)
Total increase (decrease) 
  in asset value                    (1.85)       2.68           (2.40)
Net asset value, end of year        $25.87       $27.72         $25.04
Total return*                       (2.87%)      17.31%         (2.48%)
Ratio to average net assets:
     Net investment income          4.85%        4.49%          4.30%
     Total expenses**               N/A          N/A            N/A
     Net expenses                   1.30%        1.29%          1.34%
     Expenses reimbursed 
       &/or waived                  -            -              -
Portfolio turnover                  24%          34%            46%
Average commission rate paid        N/A          N/A            N/A
Net assets, end of year 
  (in thousands)                   $242,617      $212,178       $171,931
Number of shares outstanding
at end of year (in thousands)       9,377        7,654          6,866

         *Total return prior to 1989 is not audited.
         **Effective September 30, 1995, this ratio reflects total expenses
before reduction for fees paid indirectly; such reductions are included in the
ratio of net expenses.
         N/A - Disclosure not applicable to prior periods.


                               Year                           From Inception
                               Ended                          (March 1, 1994)
Class C Shares                 September 30,                  to September 30,
CSIF Managed Growth Portfolio  1997       1996       1995       1994
Net asset value,
beginning of period            $31.05     $32.60     $28.65     $30.43
Income from investment
operations
     Net investment income     .47        .46        .54        .51
     Net realized and unrealized
     gain (loss) on investment 5.54       2.17       4.20       (1.66)
     Total from investment
     operations                6.01       2.63       4.74       (1.15)
Distributions from
     Net investment income     (.44)      (.43)      (.58)      (.63)
     Net realized gains        (2.10)     (3.75)     (.21)      -
      Total distributions      (2.54)     (4.18)     (.79)      (.63)
Total increase (decrease) in
asset value                    3.47       1.55       3.95       (1.78)
Net asset value, end of period $34.52     $31.05     $32.60     $28.65
Total return*                  20.56%     8.85%      16.85%     (3.30%)
Ratio to average net assets:
     Net investment income     1.42%      1.34%      1.61%      1.83%(a)
     Total expenses**          2.29%      2.52%      2.51%      N/A
     Net expenses              2.27%      2.50%      2.50%      2.47%(a)
     Expenses reimbursed
     and/or waived             -          .14%       .42%       1.46%(a)
Portfolio turnover             215%       111%       114%       34%
Average commission rate paid   $.0508     $.0489     N/A        N/A
Net assets, end of period
(in thousands)                 $8,898     $6,715     $4,065     $1,893
Number of shares outstanding
at end of period (in thousands) 258       216        125        66


Class A Shares                 Year Ended September 30,
CSIF Bond Portfolio            1997       1996       1995       1994
Net asset value,
beginning of period            $16.06     $16.34     $15.49     $17.77
Income from investment
operations
   Net investment income       96         .92        .96        .94
   Net realized and unrealized gain
   (loss) on investments       58         (.29)      .91        (1.81)
   Total from investment
   operations                  1.54       .63        1.87       (.87)
Distributions from
   Net investment income       (.96)      (.91)      (.93)      (.94)
   Net realized gains          -          -          (.06)      (.47)
   Tax return of capital       -          -          (.03)      -
   Total distributions         (.96)      (.91)      (1.02)     (1.41)
Total increase (decrease) in
asset value                    .58        (.28)      .85        (2.28)
Net asset value, end of period $16.64     $16.06     $16.34     $15.49
Total return*                  9.89%      3.96%      12.57%     (5.18%)
Ratio to average net assets:
   Net investment income       5.85%      5.60%      6.04%      5.64%
   Total expenses**            1.23%      1.29%      1.24%      N/A
   Net expenses                1.19%      1.26%      1.22%      1.10%
Portfolio turnover             319%       22%        29%        19%
Net assets, end of period
(in thousands)                 $59,656    $62,259    $62,929    $61,573
Number of shares outstanding
at end of period (in thousands) 3,585     3,876      3,850      3,976


         *Total return is not annualized and does not reflect deduction of
Class A front-end sales charges. Total return prior to 1989 is not audited.
         **Effective September 30, 1995, this ratio reflects total expenses
before reduction for fees paid indirectly; previously such reductions were
included in the ratio.
         (a) Annualized
         N/A - Disclosure not applicable to prior periods.


Class A Shares                              Year Ended September 30,
CSIF Bond Portfolio                         1993          1992         1991
Net asset value, beginning of period        $17.05        $16.48       $15.34
Income from investment operations
   Net investment income                    1.08          1.15         1.21
   Net realized and unrealized gain
   (loss) on investments                    .85           .78          1.15
   Total from investment operations         1.93          1.93         2.36
Distributions from
   Net investment income                    (1.08)        (1.15)       (1.21)
   Net realized gains                       (.13)         (.21)        (.01)
   Tax return of capital                    -             -            -
    Total distributions                     (1.21)        (1.36)       (1.22)
Total increase (decrease) in
asset value                                               .72          .57
1.14
Net asset value, end of period              $17.77        $17.05       $16.48
Total return*                               11.89%        12.29%       15.95%
Ratio to average net assets:
Net investment income                       6.33%         6.90%        7.63%
   Total expenses**                         N/A           N/A          N/A
   Net expenses                             .79%          .75%         .77%
   Expenses reimbursed and/or waived        .20%          .24%         .27%
Portfolio turnover                          28%           29%          24%
Net assets, end of period (in thousands)    $67,134       $50,572      $33,259
Number of shares outstanding
at end of period (in thousands)             3,778         2,965        2,018


Class A Shares                              Year Ended September 30,
CSIF Bond Portfolio                         1990          1989         1988
Net asset value, beginning of period        $15.71        $15.43       $14.81
Income from investment operations
   Net investment income                    1.24          1.31         1.16
   Net realized and unrealized gain
   (loss) on investments                    (.32)         .30          .62
   Total from investment operations         .92           1.61         1.78
Distributions from
   Net investment income                    (1.24)        (1.29)       (1.16)
   Net realized gains                       (.05)         (.04)        -
   Tax return of capital                    -             -            -
    Total distributions                     (1.29)        (1.33)       (1.16)
Total increase (decrease) in
asset value                                 (.37)         .28          .62
Net asset value, end of period              $15.34        $15.71       $15.43
Total return*                               6.09%         10.93%       12.32%
Ratio to average net assets:
Net investment income                       8.02%         8.53%        8.14%
   Total expenses**                         N/A           N/A          N/A
   Net expenses                             .65%          .17%         -
   Expenses reimbursed and/or waived        .45%          .92%         1.56%
Portfolio turnover                          22%           50%          27%
Net assets, end of period (in thousands)    $23,298       $12,792      $5,235
Number of shares outstanding
at end of period (in thousands)             1,519         814          339

*        Total return is not annualized and does not reflect deduction of
Class A front-end sales charges. Total return prior to 1989 is not audited.
**       Effective September 30, 1995, this ratio reflects total expenses
before reduction for fees paid indirectly; such reductions are included in the
ratio of net expenses.
         N/A - Disclosure not applicable to prior periods.


Class A Shares                   Year Ended September 30,
CSIF Equity Portfolio            1997        1996         1995        1994
Net asset value, beginning 
  of period                      $22.54      $21.12      $20.13       $21.43
Income from investment operations
   Net investment income         -           .03          .06         .13
   Net realized and unrealized gain
   (loss)on investments          6.73        3.26         2.22        (1.04)
   Total from investment 
     operations                  6.73         3.29        2.28        (.91)
Distributions from
   Net investment income         (.01)       (.06)        (.04)       (.28)
   Net realized gains            (1.49)      (1.81)       (1.25)      (.11)
   Total distributions           (1.50)      (1.87)       (1.29)      (.39)
Total increase (decrease) in
net asset value                  5.23        1.42         .99         (1.30)
Net asset value, end of period   $27.77      $22.54       $21.12      20.13
Total return*                    31.34%      16.62%       12.43%      (4.33%)
Ratio to average net assets:
   Net investment income         .03%        .15%         .32%        .65%
   Total expenses**              1.21%       1.29%        1.38%       N/A
   Net expenses                  1.20%       1.27%        1.36%       1.27%
   Expenses reimbursed and/or waived         -            -           --
Portfolio turnover               93%         118%         35%         94%
Average commission rate paid     $.0574      $.0556       N/A         N/A
Net assets, end of period 
     (in thousands)              $147,002    $101,344    $90,951      $92,970
Number of shares outstanding
at end of period (in thousands)  5,294       4,496        4,307       4,620


Class A Shares, con't.
         Year Ended September 30,
         1993     1992     1991     1990    1989     1988
         $20.03   $18.89   $15.86   $18.07  $14.58   $15.33

         21       .17      .44      .32     .40      .87

         1.36     1.20     2.96     (2.24)  3.40     (1.53)
         1.57     1.37     3.40     (1.92)  3.80     (.66)

         (.17)    (.23)    (.37)    (.24)   (.31)    (.08)
         -        -        -        (.05)   -        (.01)
         (.17)    (.23)    (.37)    (.29)   (.31)    (.09)

          1.40    1.14     3.03     (2.21)  3.49     (.75)
         $21.43   $20.03   $18.89   $15.86  $18.07   $14.58
         7.82%    7.36%    21.88%   (10.80%)26.69%   (4.26%)

         1.06%    1.02%    1.94%    2.64%   2.48%    2.85%
         N/A      N/A      N/A      N/A     N/A      N/A
         1.13%    1.17%    1.04%    .78%    .21%     N/A
         -        -        .18%     .50%    1.17%    2.49%
         43%      24%      27%      31%     8%       23%
         N/A      N/A      N/A      N/A     N/A      N/A
         $85,042  $64,629  $42,642  $22,212 $7,927   $1,711
 
         3,968    3,226    2,258    1,401   439      117


     *Total return is not annualized and does not reflect deduction of Class A
front-end sales charges. Total return prior to 1989 is not audited.
     **Effective September 30, 1995, this ratio reflects total expenses before
reduction for fees paid indirectly; such reductions are included in the ratio
of net expenses.
     N/A - Disclosure not applicable to prior periods.


                                                                From Inception
                                                                (March 1, 1994)
Class C Shares                   Year Ended September 30,      to September 30,
CSIF Equity Portfolio            1997        1996       1995          1994
Net asset value, beginning 
  of period                      $21.71      $20.66     $19.98       $22.12
Income from investment operations
   Net investment income         (.05)       (.16)      (.03)         (.06)
   Net realized and unrealized gain
   (loss)on investments          6.21        3.04       2.05          (2.08)
   Total from investment 
     operations                  6.16        2.88       2.02          (2.14)
Distributions from
   Net investment income         (.01)       (.02)      (.09)         -
   Net realized gains            (1.49)      (1.81)     (1.25)        -
   Total distributions           (1.50)      (1.83)     (1.34)        -
Total increase (decrease) in
net asset value                  4.66        1.05       .68           (2.14)
Net asset value, end of period   $26.37      $21.71     $20.66        $19.98
Total return*                    29.84%      14.85%     11.16%        (9.14%)
Ratio to average net assets:
   Net investment income        (1.08%)     (1.42%)    (.84%)        (1.06%)(a)
   Total expenses**              2.31%       2.86%      2.51%         N/A
   Net expenses                  2.30%       2.85%      2.50%         2.75%(a)
   Expenses reimbursed 
     and/or waived               -           -          1.07%         4.60%(a)
Portfolio turnover               93%         118%       35%           94%
Average commission rate paid     $.0574      $.0556     N/A           N/A
Net assets, end of period 
   (in thousands)                $6,249     $2,996      $1,802        $670
Number of shares outstanding
at end of period (in thousands)  237         138        87            34


Class A Shares                      Year Ended September 30,
CWVF International Equity           1997       1996       1995       1994
Net asset value, beginning of year  $18.62     $17.62     $17.99     $16.35
Income from investment operations
   Net investment income            .10        .04        .11        -
   Net realized and unrealized
   gain (loss)                      3.81       1.53       .38        2.14
   Total from investment operations 3.91       1.57       .49        2.14
Distributions from:
   Net investment income            (.05)      (.13)      -          (.03)
   Excess of net
   investment income                -          -          -          (.04)
   Net realized gains               (.42)      (.44)      (.86)      (.43)
   Total distributions              (.47)      (.57)      (.86)      (.50)
Total increase (decrease) 
   in net asset value               3.44       1.00       (.37)      1.64
Net asset value, end of year        $22.06     $18.62     $17.62     $17.99
Total return*                       21.44%     9.22%      3.19%      13.44%
Ratio to average net assets:
   Net investment income (loss)     .51%       .23%       .68%       (.04%)
   Total expenses**                 1.91%      1.95%      1.93%      N/A
   Net expenses                     1.76%      1.81%      1.79%      1.96%
   Expenses reimbursed 
      and/or waived                 -          -          -          .04%
Portfolio turnover                  58%        96%        73%        78%
Average commission rate paid        $.0222     $.0339     N/A        N/A
Net assets, end of year 
   (in thousands)                   $225,169   $194,032   $191,586   $175,543
Number of shares outstanding at
end of year (in thousands)          10,207     10,422     10,876     9,755


                                                       From Inception
                                      Year Ended       (July 2, 1992)
Class A Shares                        Sept. 30,        to September 30,
CWVF International Equity             1993             1992
Net asset value, beginning of period  $14.31           $15.00
Income from investment operation
   Net investment income              .08              .02
   Net realized and unrealized 
      gain (loss)                     2.04             (.71)
   Total from investment operations   2.12             (.69)
Distributions from:
   Net investment income              (.05)            -
   Excess of net
   investment income                  -                -
   Net realized gains                 (.03)            -
   Total distributions                (.08)            -
Total increase (decrease) 
   in net asset value                 2.04             (.69)
Net asset value, ending               $16.35           $14.31
Total return*                         14.95%           (4.60%)
Ratio to average net assets:
   Net investment income (loss)       .80%             1.23%(a)
   Total expenses**                   N/A              N/A
   Net expenses                       1.50%            1.01%(a)
   Expenses reimbursed and/or waived  .20%             .60%(a)
Portfolio turnover                    35%              -
Average commission rate paid          N/A              N/A
Net assets, end of period 
   (in thousands)                     $54,280         $8,440
Number of shares outstanding
at ending (in thousands)              3,319            590


   *Total return is not annualized and does not reflect deduction of Class A
front-end sales charges. Total return prior to 1989 is not audited.
   **Effective September 30, 1995, this ratio reflects total expenses before
reduction for fees paid indirectly; such reductions are included in the ratio
of net expenses.
   (a) Annualized
   N/A - Disclosure not applicable to prior periods.


                                                                   From
                                                                   Inception
                                                                   (3/1/94)
Class C Shares                      Year Ended Sept. 30,           to Sept.30,
CWVF International Equity           1997       1996       1995       1994
Net asset value, beginning 
  of period                         $18.20     $17.28     $17.86     $18.24
Income from investment operations
   Net investment income            (.07)      (.15)      (.05)      (.06)
   Net realized and unrealized gain
   (loss) on investments            3.68       1.51       .32        (.32)
   Total from investment operations 3.61       1.36       .27        (.38)
Distributions from:
   Net realized gains               (.42)      (.44)      (.85)      -
   Total distributions              (.42)      (.44)      (.85)      -
Total increase (decrease) 
   in net asset value               3.19       .92        (.58)      (.38)
Net asset value, ending             $21.39     $18.20     $17.28     $17.86
Total return*                       20.22%     8.07%      1.95%      (1.27%)
Ratio to average net assets:
   Net investment income (loss)     (.47%)     (.88%)     (.47%)     (1.16%)(a)
   Total expenses**                 2.91%      3.08%      3.12%      N/A
   Net expenses                     2.76%      2.93%      2.99%      3.32%(a)
   Expenses reimbursed 
      and/or waived                 -          -          .13%       .50%(a)
Portfolio turnover                  58%        96%        73%        78%
Average commission rate paid        $.0222     $.0339     N/A        N/A
Net assets, end of period 
   (in thousands)                   $8,799     $6,779     $6,061     $3,620
Number of shares outstanding
at ending (in thousands)            411        373        351        203


         *Total return is not annualized and does not reflect deduction of
Class A front-end sales charges. Total return prior to 1989 is not audited.
         **Effective September 30, 1995, this ratio reflects total expenses
before reduction for fees paid indirectly; such reductions are included in the
ratio of net expenses.
         (a) Annualized
         N/A - Disclosure not applicable to prior periods.


INVESTMENT OBJECTIVES AND POLICIES

   
The Funds are designed for individual and institutional investors, including
ERISA fiduciaries, seeking growth of capital or current income through
investment in enterprises that make a significant contribution to society
through their products and services and through the way they do business. The
CSIF Managed Growth Portfolio is designed for long-term investment through a
balanced portfolio. The CSIF Money Market Portfolio is designed for short-term
cash management and stability of principal. The CSIF Bond Portfolio is
designed for current income and preservation of capital. The CSIF Equity
Portfolio and CWVF International Equity Fund are designed for capital growth.
The net asset value of each Portfolio, except for CSIF Money Market Portfolio,
will fluctuate in response to changes in market conditions and the value of
portfolio investments.
    

CSIF Money Market Portfolio
The Money Market Portfolio seeks to provide the highest level of current
income, consistent with liquidity, safety and security of capital, through
investment in money market instruments, including repurchase agreements with
recognized securities brokers and banks secured by such instruments, and
reverse repurchase agreements, all selected in accordance with the Fund's
investment and social criteria. The Money Market Portfolio attempts to
maintain a constant net asset value of $1.00 per share.

The Money Market Portfolio invests only in high grade, short-term money market
instruments which may include: obligations issued or guaranteed as to
principal by the United States Government, its agencies and instrumentalities;
US dollar-denominated certificates of deposit, time deposits and bankers'
acceptances of US banks, generally banks with assets in excess of $1 billion;
taxable municipal securities, including variable rate demand notes; and
commercial paper (including participation interests in loans extended by banks
to issuers of commercial paper) that at the date of investment is rated A-1 by
Standard & Poor's Ratings Group ("S&P") or Prime-1 by Moody's Investors
Service, Inc. ("Moody's"), or, if not rated, is of comparable quality.

CSIF Managed Growth Portfolio
The Managed Growth Portfolio seeks to achieve a total return above the rate of
inflation through an actively managed portfolio of stocks, bonds and money
market instruments (including repurchase agreements secured by such
instruments) selected with a concern for the investment and social impact of
each investment. It is not the policy of the Managed Growth Portfolio to take
risks to obtain speculatively or aggressively high returns. The portfolio is a
"balanced" portfolio, and intends to invest approximately 55% to 60% of its
assets in equities and 40% to 45% in fixed income securities. See "Portfolio
Managers" for more information. Generally, equity investments are selected by
the subadvisors, subject to direction and control by CAMCO and the CSIF Board
of Trustees. CAMCO manages the Portfolio's fixed-income assets and determines
the mix for the Managed Growth Portfolio depending upon its view of market
conditions and the economic outlook.

CSIF Managed Growth Portfolio may purchase both common and preferred stock.
The Portfolio normally invests in bonds which are considered investment-grade,
including bonds which are direct or indirect obligations of the US Government,
or which at the date of investment are rated AAA, AA, A, or BBB by S&P or Aaa,
Aa, A, or Baa by Moody's. The Portfolio may purchase lower-rated obligations
(those rated below BBB, which are considered noninvestment-grade securities)
but no more than 20% of its assets may be invested in obligations rated lower
than B. The Portfolio may purchase, without limitation, bonds which are
unrated but of comparable quality to bonds rated B or better as determined by
CAMCO under the supervision of the CSIF Board of Trustees. The Managed Growth
Portfolio does not currently hold or intend to invest more than 5% of its net
assets in noninvestment-grade securities. See the Statement of Additional
Information ("SAI") for additional information concerning bond ratings.

CSIF Bond Portfolio
The Bond Portfolio seeks to provide as high a level of current income as is
consistent with prudent investment risk and preservation of capital through
investment in bonds and other straight debt securities, including taxable
municipal securities, selected pursuant to the Fund's investment and social
criteria. The Bond Portfolio is neither speculative nor conservative in its
investment policies and will take reasonable risks in seeking to achieve its
investment objective of current income and preservation of capital. Debt
securities may be long-term, intermediate-term, short-term, or any combination
thereof, depending on the Advisors' evaluation of current and anticipated
market patterns and trends; the Advisors expect that the Bond Portfolio's
average weighted maturity will range between 5 and 20 years. The value of the
Portfolio will vary inversely with changes in interest rates.

   
In seeking to achieve these objectives, it is anticipated that under normal
conditions the Bond Portfolio will invest at least 65% of the value of its net
assets in publicly-traded straight debt securities which have an investment
grade rating of A or above as determined by a nationally recognized rating
service such as S&P or Moody's, or if unrated, determined to be of comparable
quality. The Portfolio may also invest in obligations issued or guaranteed by
the US Government or its agencies or instrumentalities, or in cash and cash
equivalents. Up to 20% of the Bond Portfolio's total assets may be invested in
straight debt securities which are not rated within the four highest grades,
in convertible debt securities, convertible preferred and preferred stocks, or
other securities. The Bond Portfolio does not currently hold or intend to
invest more than 5% (approximately) of its net assets in noninvestment-grade
securities. See the SAI for additional information concerning bond ratings.
    

CSIF Equity Portfolio
The Equity Portfolio seeks growth of capital through investment in the equity
securities of issuers within industries perceived to offer opportunities for
potential capital appreciation and which satisfy the Fund's investment and
social criteria. The Equity Portfolio is neither speculative nor conservative
in its investment policies and will take reasonable risks in seeking to
achieve its investment objective of growth of capital.

CSIF Equity Portfolio normally invests at least 80% of the value of its net
assets in equity securities. Such securities include common stocks,
convertible securities and preferred stocks. For liquidity purposes or pending
the investment of the proceeds of the sale of its shares, this Portfolio may
invest up to 20% of the value of its assets in money market instruments,
including: obligations of the US Government, its agencies and
instrumentalities; certificates of deposit of banks, generally, those having
total assets of at least one billion dollars; and commercial paper or other
corporate notes of investment grade quality. Such securities may be purchases
subject to repurchase agreements with recognized securities brokers and banks.
If the Equity Portfolio has assumed a temporary defensive posture, there is no
limitation on the percentage of its assets which may be invested in money
market instruments. The Equity Portfolio does not currently hold or intend to
invest more than 5% of its net assets in noninvestment-grade debt securities.

ADDITIONAL INVESTMENT POLICIES

Calvert Social Investment Fund
As a matter of fundamental investment policy which cannot be changed without
shareholder approval, no more than 25% of the value of a Portfolio's assets
may be invested in any one industry, no more than 5% of a Portfolio's assets
may be invested in any one company, nor may a Portfolio, or CSIF in the
aggregate, purchase more than 10% of the voting securities of any issuer.

   
CSIF Managed Growth, Bond and Equity Portfolios each can use various
techniques to increase or decrease its exposure to changing security prices,
interest rates, or other factors that affect security values. These techniques
may involve derivative transactions such as buying and selling options and
futures contracts and leveraged notes, entering into swap agreements, and
purchasing indexed securities. The Portfolios can use these practices either
as substitution or as protection against an adverse move in the Portfolios to
adjust the risk and return characteristics of the Portfolios. If the Advisor
and/or Subadvisor judges market conditions incorrectly or employs a strategy
that does not correlate well with a Portfolio's investments, or if the
counterparty to the transaction does not perform as promised, these techniques
could result in a loss. These techniques may increase the volatility of a
Portfolio and may involve a small investment of cash relative to the magnitude
of the risk assumed. Any instruments determined to be illiquid are subject to
the Portfolios' 15% restriction on illiquid securities. See the CSIF SAI for
more detail about these strategies.
    

CSIF may engage in repurchase agreements and reverse repurchase agreements. In
a repurchase agreement, the Portfolio buys a security subject to the right and
obligation to sell it back at a higher price. In order to minimize any risk
involved, the Portfolio engages in such transactions only with recognized
securities brokers determined by the Advisor to present a minimal credit risk.
Repurchase agreements are fully collateralized and always have a maturity of
less than one year. In a reverse repurchase agreement, the Portfolio sells a
security subject to the right and obligation to buy it back at a higher price.
The Portfolio then invests the proceeds from the transaction in another
obligation in which it is authorized to invest. For reverse repurchase
agreements, the Portfolio maintains liquid assets equal in value to the
repurchase price in a segregated account.

Each CSIF Portfolio may borrow money from banks (and pledge its assets to
secure such borrowing) for temporary or emergency purposes, but not for
leverage. Such borrowing may not exceed 10% of the value of that Portfolio's
total assets.

The Managed Growth and Bond Portfolio's fixed-income investment strategies
caused them to have a relatively high portfolio turnover compared to other
portfolios. A portfolio with high turnover may incur higher transaction costs,
such as custodian and settlement fees. During fiscal 1997, brokerage
commission expenses remained relatively level even though turnover increased
significantly, since the fixed income investments are traded on a spread,
rather than a commission basis.

CSIF has adopted the following operating (i.e., non-fundamental) investment
policies which may be changed by the Board of Trustees without shareholder
approval:
CSIF Managed Growth, Bond, and Equity Portfolios may not purchase or hold
illiquid securities if more than 15% of the value of that Portfolio's net
assets would be invested in such securities. CSIF Money Market illiquid
securities limitation is 10% of net assets.

Each CSIF Portfolio may invest up to 25% of its assets in the securities of
foreign issuers. The Portfolios may purchase foreign securities directly, on
foreign markets, or those represented by American Depositary Receipts
("ADRs"), or other receipts evidencing ownership of foreign securities, such as
International Depository Receipts and Global Depositary Receipts. ADRs are US
dollar-denominated and traded in the US on exchanges or over the counter.
Foreign securities may involve additional risks, including currency
fluctuations, risks relating to political or economic conditions, and the
potentially less stringent investor protection and disclosure standards of
foreign markets. These factors could make foreign investments, especially
those in developing countries, less liquid and more volatile. In addition, the
costs of foreign investing, including withholding taxes, brokerage commissions
and custodial costs are generally higher than for US investments. By investing
in ADRs rather than directly in foreign issuers' stock, the Portfolios may
avoid some currency and some liquidity risks. The information available for
ADRs is subject to the more uniform and more exacting accounting, auditing and
financial reporting standards of the domestic market or exchange on which they
are traded. The Money Market Portfolio may purchase only high quality US
dollar-denominated instruments.

CWVF International Equity Fund
CWVF International Equity seeks to provide a high total return consistent with
reasonable risk by investing primarily in a globally diversified portfolio of
equity securities. All investments are screened for financial and social
criteria. There is, of course, no assurance that the Fund will be successful
in meeting its objective.

Under normal circumstances, International Equity will invest at least 65% of
its assets in equity securities. International Equity will invest primarily in
common stocks of established foreign companies believed by the Subadvisor to
have potential for capital growth, income or both. Companies are considered
established if their securities are traded on a recognized stock exchange.
However, International Equity may invest in any other type of security
including, but not limited to, convertible securities, preferred stocks,
bonds, notes and other debt securities of companies, (including Euro-currency
instruments and securities) or of any international agency (such as the Asian
Development Bank or Inter-American Development Bank) or obligations of
domestic or foreign governments and their political subdivisions, and in
foreign currency transactions. International Equity may invest in American or
European Depositary Receipts ("ADRs" or "EDRs"). See the Statement of
Additional Information. International Equity may establish and maintain
reserves for temporary defensive purposes or to enable it to take advantage of
buying opportunities. Its reserves may be invested in domestic as well as
foreign short-term money market instruments including, but not limited to, US
and foreign government and agency obligations, and obligations of
supranational entities, certificates of deposit, bankers' acceptances, time
deposits, commercial paper, short-term corporate debt securities and
repurchase agreements. Any money market instruments will be rated at least
A-2/P-2 or better by a nationally recognized statistical rating organization
such as Standard and Poor's or Moody's, or, if unrated, determined by the
Advisor or Subadvisor to be of equivalent credit quality. CWVF International
Equity may also engage in certain options transactions, and enter into futures
contracts and related options for hedging purposes.

Under normal circumstances, CWVF International Equity will invest at least 65%
of its assets in the securities of issuers in no less than three countries,
other than the USA. CWVF International Equity makes investments in various
countries. Under normal circumstances, International Equity may, from time to
time, have more than 25% of its assets invested in any major industrial or
developed country which in the view of the Subadvisor poses no unique
investment risk. The Subadvisor considers an investment in a given foreign
country to have "no unique investment risk" if International Equity's
investment in that country is not disproportionate to the relative size of the
country's market versus the Morgan Stanley Capital International Europe-Far
East-Asia (EFEA) or World Index or other comparable index, and if the capital
markets in that country are mature, and of sufficient liquidity and depth.
Under exceptional economic or market conditions, International Equity may
invest substantially all of its assets in only one or two countries, or in US
government obligations. As an operating policy, CWVF International Equity will
limit its investment in securities of US issuers, excluding Special Equities
and High Social Impact Investments, to 5% of its net assets.

In determining the appropriate distribution of investments among various
countries and geographic regions, the Subadvisor ordinarily will consider the
following factors: prospects for relative economic growth among foreign
countries; expected levels of inflation; relative price levels of the various
capital markets; government policies influencing business conditions; the
outlook for currency relationships and the range of individual investment
opportunities available to the global investor. International Equity may
invest up to 30% of its net assets in developing countries, which involve
exposure to economic structures that are generally less diverse and mature
than in the United States, and to political systems which may be less stable.
A country is considered to be a developing country if it is not included in
the Morgan Stanley Capital International World Index.

CWVF International Equity may may invest up to 35% of its net assets in debt
securities excluding money market instruments. Of this, at least 30% will be
of the highest credit quality available (rated AAA or Aaa by Standard & Poor's
("S&P") or Moody's, respectively, or if not rated by S&P or Moody's, then
determined by the Subadvisor to be of equivalent credit quality). The
remaining 5% of Fund assets that may be invested in debt securities may be
rated lower than AAA, although the Subadvisor does not intended to purchase
any bonds rated lower than AAA unless the instrument provides an opportunity
to invest in an attractive company in which an equity investment is not
currently available or desirable. All fixed income instruments are subject to
interest-rate risk; that is, when market interest rates rise, the current
principal value of a bond will decline.

CWVF International Equity may write covered call options and purchase call and
put options on securities and security indices, and may write secured put
options and enter into option transactions on foreign currency. It may also
engage in transactions in financial futures contract and related options for
hedging purposes, and invest in warrants, stock rights and repurchase
agreements. These investment techniques and the related risks are described in
more detail in the Statement of Additional Information.

Options on foreign currencies will be covered by securities denominated in
that currency. Options on securities indices will be covered by securities
that substantially replicate the movement of the index. CWVF International
Equity may not write options on more than 50% of its total assets. Management
presently intends to cease writing options in and as long as 25% of such total
assets are subject to outstanding options contracts. CWVF International Equity
may invest up to an aggregate of 5% of its total assets in exchange-traded or
over-the-counter call and put options on securities and securities indices and
foreign currencies. Purchases of such options may be made for the purpose of
hedging against changes in the market value of the underlying securities or
foreign currencies.

Lending portfolio securities
CWVF International Equity may lend its portfolio securities to member firms of
the New York Stock Exchange and commercial banks with assets of one billion
dollars or more, provided the value of the securities loaned will not exceed
10% of assets. Any such loans must be secured continuously in the form of cash
or cash equivalents such as US Treasury bills; the amount of the collateral
must on a current basis equal or exceed the market value of the loaned
securities, and CWVF International Equity must be able to terminate such loans
upon notice at any time. International Equity will exercise its right to
terminate a securities loan in order to preserve its right to vote upon
matters of importance affecting holders of the securities.

The advantage of such loans is that CWVF International Equity continues to
receive the equivalent of the interest earned or dividends paid by the issuers
on the loaned securities while at the same time earning interest on the cash
or equivalent collateral.

Securities loans are usually made to broker/dealers and other financial
institutions to facilitate their delivery of such securities. As with any
extension of credit, there may be risks of delay in recovery and possibly loss
of rights in the loaned securities should the borrower of the loaned
securities fail financially. However, International Equity will make loans of
its portfolio securities only to those firms the Advisor or Subadvisor deems
creditworthy and only on such terms the Advisor or Subadvisor believes should
compensate for such risk. On termination of the loan the borrower is obligated
to return the securities. International Equity will realize any gain or loss
in the market value of the securities during the loan period and may pay
reasonable custodial fees in connection with the loan.

International Equity Fund's investment objective and those policies set forth
as fundamental investment restrictions may not be changed without shareholder
approval.

Risk Factors - CWVF International Equity
An investment in International Equity is subject to various risks.
International Equity's use of certain investment techniques, such as foreign
currency options, involves special risks. See "Investment Techniques and
Related Risks."

There are substantial and different risks involved in investing in foreign
securities. You should consider these risks carefully. For example, there is
generally less publicly available information about foreign companies than is
available about companies in the US Foreign companies are not subject to
uniform audit and financial reporting standards, practices and requirements
comparable to those in the US.

Foreign securities involve currency risks. The US dollar value of a foreign
security tends to decrease when the value of the dollar rises against the
foreign currency in which the security is denominated and tends to increase
when the value of the dollar falls against such currency. Fluctuations in
exchange rates may also affect the earning power and asset value of the
foreign entity issuing the security. Dividend and interest payments may be
returned to the country of origin, based on the exchange rate at the time of
disbursement, and restrictions on capital flows may be imposed. Losses and
other expenses may be incurred in converting between various currencies in
connection with purchases and sales of foreign securities.

Foreign stock markets are generally not as developed or efficient as those in
the US. In most foreign markets volume and liquidity are less than in the US
and, at times, volatility of price can be greater than that in the US. Fixed
commissions on foreign stock exchanges are generally higher than the
negotiated commissions on US exchanges. There is generally less government
supervision and regulation of foreign stock exchanges, brokers and companies
than in the US.

There is also the possibility of adverse changes in investment or exchange
control regulations, expropriation or confiscatory taxation, limitations on
the removal of funds or other assets, political or social instability, or
diplomatic developments which could adversely affect investments, assets or
securities transactions of International Equity in some foreign countries.
CWVF International Equity is not aware of any investment or exchange control
regulations which might substantially impair the operations of CWVF
International Equity as described, although this could change at any time.

The dividends and interest payable on certain of International Equity's
foreign securities may be subject to foreign withholding taxes, thus reducing
the net amount available for distribution to International Equity
shareholders. The expense ratio of CWVF International Equity can be expected
to be higher than those of investment companies investing only in domestic
securities since the costs of operations are higher.

INVESTMENT SELECTION PROCESS

Investments are selected on the basis of their ability to contribute to the
dual objectives of financial soundness and social criteria.

   
Potential investments for a Fund are first screened for financial soundness
and then evaluated according to that Fund's social criteria. To the greatest
extent possible, investments are made in companies exhibiting unusual,
positive accomplishments with respect to one or more of the criteria.
Companies must meet the Fund's minimum standards for all its criteria.
    

With respect to government securities, CSIF invests primarily in debt
obligations issued or guaranteed by agencies or instrumentalities of the US
Government whose purposes further or are compatible with CSIF's social
criteria, such as obligations of the Student Loan Marketing Association,
rather than general obligations of the US Government, such as Treasury
securities.

Although each Fund's social criteria and consideration tend to limit the
availability of investment opportunities more than is customary with other
investment companies, CAMCO and the Subadvisors of the Funds believe there are
sufficient investment opportunities to permit full investment among issuers
which satisfy each Fund's investment and social objectives.

The selection of an organization for investment by a Portfolio does not
constitute endorsement or validation by each Fund, nor does the exclusion of
an organization necessarily reflect failure to satisfy each Fund's social
criteria. Investors in each Fund are invited to send a brief description of
companies they believe might be suitable for investment.

All Investments are selected with a concern for the social impact of each
investment

Calvert Social Investment Fund
Calvert Social Investment Fund invests in accordance with its philosophy that
long-term rewards to investors will come from those organizations whose
products, services, and methods enhance the human condition and the
traditional American values of individual initiative, equality of opportunity
and cooperative effort.

CSIF has developed the following criteria for the selection of organizations
in which it invests. CSIF recognizes, however, that these criteria represent
standards of behavior which few, if any, organizations totally satisfy and
that, as a matter of practice, evaluation of a particular organization in the
context of these criteria will involve subjective judgment by CAMCO and CSIF's
Subadvisors.
         Given these considerations, CSIF seeks to invest in a producer or
service provider which:

1.       Delivers safe products and services in ways which sustain our natural
environment. For example, CSIF looks for companies that produce energy from
renewable resources, while avoiding consistent polluters.

2.       Is managed with participation throughout the organization in defining
and achieving objectives. For example, CSIF looks for companies that offer
employee stock ownership or profit-sharing plans.

3.       Negotiates fairly with its workers, provides an environment
supportive of their wellness, does not discriminate on the basis of race,
gender, religion, age, disability, ethnic origin, or sexual orientation, does
not consistently violate regulations of the Equal Employment Opportunity
Commission, and provides opportunities for women, disadvantaged minorities,
and others for whom equal opportunities have often been denied. For example,
CSIF considers both unionized and non-union firms with good labor relations.

4.       Fosters awareness of a commitment to human goals, such as creativity,
productivity, self-respect and responsibility, within the organization and the
world, and continually recreates a context within which these goals can be
realized. For example, CSIF looks for companies with an above average
commitment to community affairs and charitable giving.

CSIF will not invest in an issuer which the Advisors determine to be
significantly engaged in:

1.       The production of nuclear energy or the manufacture of equipment to
produce nuclear energy.

2.       Business activities in support of repressive regimes.

3.       The manufacture of weapon systems.

CSIF will not, as a matter of operating policy which may be changed without
the approval of a majority of the outstanding shares, invest in an issuer
primarily engaged in the manufacture of alcoholic beverages or tobacco
products, or the operation of gambling casinos.

   
CSIF believes that social and technological change will continue to transform
America and the world into the next century. Those enterprises which exhibit a
social awareness measured in terms of the above attributes and considerations
should be better prepared to meet future societal needs for goods and
services. By responding to social concerns, these enterprises should maintain
flexibility and further social goals. In so doing they should not only avoid
the liability that may be incurred when a product or service is determined to
have a negative social impact or has outlived its usefulness, but also be
better positioned to develop opportunities to make a profitable contribution
to society. These enterprises should be ready to respond to external demands
and ensure that over the longer term they will be viable to provide a positive
return to both investors and society as a whole.
    

Calvert World Values International Equity Fund
CWVF International Equity carefully reviews company policies and behavior
regarding social issues important to global quality of life.

CWVF International Equity currently observes the following operating policies
which may be changed by its Board of Directors without shareholder approval:

1.       It actively seeks to invest in companies that achieve excellence in
both financial return and environmental soundness, selecting issuers that take
positive steps toward preserving and enhancing our natural environment through
their operations and products, and avoiding companies with poor environmental
records;

2.       CWVF International Equity seeks to invest in companies with positive
labor practices. We consider the International Labor Organization's basic
conventions on worker rights as a guideline for our labor criteria.
International Equity avoids investing in companies that demonstrate a pattern
of engaging in forced, compulsory, or child labor. In addition, we seek to
invest in companies that hire and promote women and ethnic minorities; respect
the right to form unions; comply, at a minimum, with domestic hour and wage
laws; and provide good health and safety standards;

3.       International Equity will not invest in issuers which the Advisor or
Subadvisor ascertains contribute to human rights abuses in other countries;

4.       It will not invest in producers of nuclear power or nuclear weapons,
or companies with more than 10% of revenues derived from the production or
sale of weapons systems; and

5.       It will not invest in companies which derive more than 10% of
revenues from the production of alcohol or tobacco products, and actively
seeks to invest in companies whose products or services improve the quality of
or access to health care, including public health and preventative medicine.

CWVF International Equity believes that there are long-term benefits inherent
in an investment philosophy that demonstrates concern for the environment,
human rights, economic priorities, and international relations. Those
enterprises which exhibit a social awareness measured in terms of the above
attributes and considerations should be better prepared to meet future
societal needs for goods and services. By responding to social concerns, these
enterprises should not only avoid the liability that may be incurred when a
product or service is determined to have a negative social impact or has
outlived its usefulness, but also be better positioned to develop
opportunities to make a profitable contribution to society. CWVF International
Equity believes these enterprises should be ready to respond to external
demands and ensure that over the longer term they will be viable to provide a
positive return to both investors and society as a whole.

The spirit of Calvert World Values International Equity Fund's social vision
is similar to Calvert Social Investment Fund, but the application of the
social analysis is significantly different. International investing brings
unique challenges in terms of corporate disclosure, regulatory structures,
environmental standards, and differing national and cultural priorities. Due
to these factors, the CWVF social investment standards are less stringent than
those of CSIF. CWVF may invest in companies that operate in countries with
poor human rights records if we believe the companies are making a positive
contribution.

Special Equities and Private Placements - CSIF and International Equity
Due to the particular social objective of the Funds, opportunities may exist
to promote especially promising approaches to social goals through privately
placed investments. The Special Equities Committee of each Fund's Board
identifies, evaluates, and selects certain of these investments, subject to
ratification by the Boards. The private placement investments undertaken by
the Funds, if any, may be subject to a high degree of risk. Such investments
may involve relatively small and untried enterprises that have been selected
in the first instance because of some attractive social objectives or policies.

Many private placement investments have no readily available market and may
therefore be considered illiquid. Investments in private placements and other
securities for which market quotations are not readily available are valued
under the direction and control of the Boards.

High Social Impact Investments - CSIF and International Equity
Each Portfolio may invest a small portion of its respective assets in
investments in securities that offer a rate of return below the then
prevailing market rate and that present attractive opportunities for
furthering the Fund's social criteria ("High Social Impact Investments"); such
High Social Impact investments must be less than 1% of the applicable CSIF
Portfolio's assets, and less than 3% of CWVF International Equity's assets.
Such securities are typically illiquid and unrated and generally considered
noninvestment-grade debt securities which involve a greater risk of default or
price decline than investment-grade securities. Through diversification and
credit analysis and limited maturity, investment risk can be reduced, although
there can be no assurance that losses will not occur. The High Social Impact
Investments Committee of the Boards identifies, evaluates, selects and values
these investments, subject to ratification by the Boards.

YIELD AND TOTAL RETURN

The Portfolios may advertise different types of yield and total return
performance, which is calculated separately for each class. All performance
figures are based on historical earnings and are not intended to indicate
future performance. Further information about each Portfolio's performance is
contained in its Annual Report to Shareholders, which may be obtained without
charge.

CSIF Money Market Portfolio
The Money Market Portfolio may advertise "yield" and "effective yield." The
"yield" refers to the actual income generated by an investment over a
particular base period, stated in the advertisement. If the base period is
less than one year, the yield will be "annualized." That is, the amount of
income generated by the investment during the base period is assumed to be
generated over a one-year period and is shown as a percentage of the
investment. The "effective yield" is calculated like yield, but assumes
reinvestment of earned income. The effective yield will be slightly higher
than the yield because of the compounding effect of this assumed reinvestment.

CSIF Bond Portfolio
Yield measures the Bond Portfolio's current investment performance, that is,
the rate of income on its portfolio investments divided by the share price.
Yield is computed by annualizing the result of dividing the net investment
income per share over a 30-day period by the maximum offering price per share
on the last day of that period. Yields are calculated according to accounting
methods that are standardized for all stock and bond funds.

CSIF Managed Growth, Bond, Equity and CWVF International Equity Portfolios
Total return differs from yield in that yield figures measure only the income
component of a Portfolio's investments, while total return includes not only
the effect of income dividends but also any change in net asset value, or
principal amount, during the stated period. The total return of a class shows
its overall change in value, including changes in share price and assuming all
of its dividends and capital gain distributions are reinvested. A cumulative
total return reflects the performance of the class over a stated period of
time. An average annual total return reflects the hypothetical annual
compounded return that would have produced the same cumulative total return if
the performance had been constant over the entire period. Because average
annual returns tend to smooth out variations in the returns, you should
recognize that they are not the same as actual year-by-year results. Both
types of total return for Class A shares usually will include the effect of
paying the front-end sales charge. Of course, total returns will be higher if
sales charges are not taken into account. Quotations of "return without
maximum sales charge" do not reflect deduction of the sales charge. You should
consider these figures only if you qualify for a reduced sales charge, or for
purposes of comparison with comparable figures which also do not reflect sales
charges, such as mutual fund averages compiled by Lipper Analytical Services,
Inc.

Fund MANAGEMENT

Each Fund is not required to hold annual shareholder meetings, but special
meetings may be called for certain purposes such as electing Trustees or
Directors, changing fundamental policies, or approving a management contract.
As a shareholder, you receive one vote for each share you own, except that
matters affecting classes differently, such as Distribution Plans, will be
voted on separately by the affected class(es).

Calvert Social Investment Fund
The Board of Trustees supervises CSIF's activities and reviews its contracts
with companies that
provide it with services. CSIF is an open-end diversified management
investment company, organized as a Massachusetts business trust on December
14, 1981.
       

   
Board of Trustees - Calvert Social Investment Fund
REBECCA ADAMSON
President, First Nations Development Institute
RICHARD L. BAIRD, JR.
Executive Vice President, Family Health Council, Inc.
JOHN G. GUFFEY, JR.
Co-Chair, Calvert Social Investment Foundation
Treasurer and Director, Silby, Guffey & Co., Inc.
JOY V. JONES, Esq.
Attorney and Entertainment Manager
BARBARA J. KRUMSIEK
President, Chief Executive Officer and Vice Chair, Calvert Group, Ltd. and
subsidiaries
TERRENCE J. MOLLNER, Ed.D.
Founder and Chair, Trusteeship Institute, Inc.
Co-Chair, Calvert Social Investment Foundation
(Ms.) SYDNEY AMARA MORRIS
Unitarian Church of Vancouver, Vancouver, British Columbia, Canada
CHARLES T. NASON
Chairman, President, and Chief Executive Officer, The Acacia Group
D. WAYNE SILBY
President, Secretary, and Director, Silby, Guffey & Co., Inc.
Chair, CSIF Board of Trustees
    

Calvert Social Investment Fund Advisory Council
The Advisory Council is a resource to the CSIF Board of Trustees regarding
communication
networks for the Fund and the application and refinement of the Fund's social
criteria.

   
TIMOTHY SMITH
(Chair) Executive Director, Interfaith Center on Corporate Responsibility
ROBERT BROWNE
President, Twenty-First Century Foundation
WILLIAM J. BYNUM
President and CEO, Enterprise Corporation for the Delta
JACK CHIN
Coordinator, Funder's Forum on Environmental Education
FRED DAVIE
Program Officer, Community and Resource Development, Ford Foundation
MARIAN WRIGHT EDELMAN
President & Founder, Children's Defense Fund
MICHAEL FISCHER
Program Officer, William and Flora Hewlett Foundation
ELIZABETH HARRIS
Vice President, UNC Partners, Inc.
SOPHIA BRACEY HARRIS
Founder and Executive Director, The Federation of Childcare Centers of
Alabama, Inc.
JAMES E. HEARD
President, Breakwater Holdings
HAZEL HENDERSON
Independent Futurist and Author
ERICA HUNT
Executive Director, Twenty-First Century Foundation
GRACE LECLAIR
Writer, Consultant and Theorist Concerning the Impacts of Economics on Family
and Community Life
KAI LEE
Professor of Environmental Studies and Director of the Center for
Environmental Studies,Williams College
JESSICA LIPNACK
President, The Networking Institute, Inc.
ROBERT CARTER RANDOLPH
Attorney and Mediator/Arbitrator
Washington Arbitration and Mediation Service
RUSTUM ROY
Professor of Geochemistry, Pennsylvania State University
BYRON RUSHING
State Representative, Massachusetts
MARC DAVID SARKADY
Leadership Consultant and International Facilitator
GAIL SNOWDEN
Group Executive, Community Banking Group, Bank of Boston
JEFFREY STAMPS
Chairman, The Networking Institute, Inc.
THOMAS STONEBACK
Vice President and Chief Administrative Officer, Rodale Press, Inc.
DARRELD RAY TURNER, II
Policy Advisor, Cherokee Nation of Oklahoma
DIANE WHITE
Owner, Blackberry

D. Wayne Silby, Chair of CSIF's Board of Trustees, serves as an ex officio
member of the Advisory Council.
    

Calvert World Values International Equity Fund
The Board of Directors supervises CWVF's activities and reviews its contracts
with companies that provide CWVF with services.

CWVF is an open-end diversified management investment company organized as a
Maryland corporation on February 14, 1992. Prior to June 1, 1996,
International Equity operated under the name of Calvert World Values Global
Equity Fund. The other series of Calvert World Values Fund, Inc. is Calvert
Capital Accumulation Fund.

Board of Directors - Calvert World Values Fund, Inc.

   
JOHN G. GUFFEY, JR.
Chair, Calvert Social Investment Foundation
Treasurer and Director, Silby, Guffey & Co., Inc.
BARBARA J. KRUMSIEK
Co-Chair of the CWVF Board of Directors
President, Chief Executive Officer and Vice Chair, Calvert Group, Ltd. and
subsidiaries
TERRENCE J. MOLLNER, Ed.D.
Founder and Chair, Trusteeship Institute, Inc.
RUSTUM ROY
Evan Pugh Professor of Solid State Geochemistry, Pennsylvania State University
D. WAYNE SILBY
President, Secretary, and Director, Silby, Guffey & Co., Inc.
Co-Chair of the CWVF Board of Directors
TESSA TENNANT
Green and ethical investing Manager, National Provident Investment Managers
Ltd.
MUHAMMAD YUNUS
Managing Director, Grameen Bank, Bangladesh
    

Calvert Asset Management Company, Inc. serves as Advisor to the Funds.
Calvert Asset Management Company, Inc. ("CAMCO") is each Fund's investment
advisor. CAMCO provides the Funds with investment supervision and management,
administrative services and office space; furnishes executive and other
personnel to the Funds; and pays the salaries and fees of all
Trustees/Directors who are employees of CAMCO or its affiliates. CAMCO may
also assume and pay certain advertising and promotional expenses of the Funds
and reserves the right to compensate broker/dealers in return for their
promotional or administrative services.

   
Calvert Group is one of the largest investment management firms in the
Washington, D.C. area.
Calvert Group, Ltd., parent of CAMCO, each Fund's shareholder servicing agent,
and distributor, is a subsidiary of Acacia Mutual Life Insurance Company of
Washington, D.C. Calvert Group is one of the largest investment management
firms in the Washington, D.C. area. Calvert Group, Ltd. and its subsidiaries
are located at 4550 Montgomery Avenue, Suite 1000N, Bethesda, Maryland 20814.
As of December 31, 1997, Calvert Group managed and administered assets of over
$5 billion and more than 200,000 shareholder and depositor accounts.
    

Portfolio Managers

   
CSIF Managed Growth Portfolio
The Managed Growth Portfolio is managed by multiple investment subadvisors.
With the multi-manager approach, there will be several investment strategies
in place at any given time in order to help the Portfolio pursue its
investment objectives. The Managed Growth Portfolio may employ "growth
managers," who generally concentrate on stocks that have demonstrated, or are
expected to produce, earnings growth rates significantly greater than the
market as a whole, as well as "value managers," who tend to make stock
selections on the basis of perceived relative value as determined by a defined
model in a bottom-up approach.

CAMCO manages the fixed-income portion of the Portfolio and has retained NCM
Capital Management Group, Inc. ("NCM") and Brown Capital Management, Inc.
("Brown") as subadvisors for the equity portion of the Portfolio.

CAMCO
CAMCO utilizes a team approach to the management of the fixed-income assets of
the Managed Growth Portfolio. CAMCO has actively managed these assets since
July 1995. Prior to this, the fixed-income assets were managed by US Trust as
a Subadvisor with CAMCO providing oversight. Reno J. Martini, Senior Vice
President and Chief Investment Officer, heads this team and oversees the
management of all Calvert portfolios for CAMCO. Mr. Martini has over 19 years
of experience in the securities industry and has been the head of the asset
management team since 1985.
    

NCM Capital Management Group, Inc.
NCM Capital Management Group, Inc. has managed a part of the equity portion of
the Managed Growth Portfolio since July 1, 1995. NCM was founded by Maceo K.
Sloan in 1986 as a subsidiary of North Carolina Mutual Life Insurance Company,
which was established by Mr. Sloan's ancestors in 1898 and is one of the
oldest and largest minority-owned financial institutions in the country. NCM
has been an employee-owned subsidiary of Sloan Financial Group since 1991.
Maceo K. Sloan, CFA, FLMI, is the Chairman, President, Chief Executive
Officer, and Chief Investment Officer. Sixty percent of Sloan Financial Group
is co-owned by Mr. Sloan and Justin E. Beckett, who is Executive Vice
President and a Director of NCM. NCM is one of the largest minority-owned
investment management firms in the country, and provides products in equity,
fixed income and balanced portfolio management. It is also one of the industry
leaders in the employment and training of minority and women investment
professionals.

   
NCM's portfolio management team consists of several members, headed by Maceo
K. Sloan and Clifford D. Mpare. Maceo K. Sloan, CFA, FLMI, is Chairman,
President, Chief Executive Officer, and Chief Investment Officer of the
company. He received a BA from Morehouse College, and MBA from Georgia State
University, and a JD from North Carolina Central University. He is a Chartered
Financial Analyst and Fellow of the Life Management Institute. Mr. Sloan is a
regular panelist on the PBS program Wall Street Week in Review and has been a
panelist and chaired several conferences concerning investment opportunities
in South Africa, such as the RCB International Seminar and the Pensions 2000
on South Africa.
    

   
Clifford D. Mpare, CFA, CMA, is Senior Vice President and Director of
Investments. He received his BComm from St. Mary's University and an MBA from
Dalhousie University. He is a Chartered Financial Analyst and a Certified
Management Accountant.

Brown Capital Management, Inc.
Brown Capital Management, Inc. of 809 Cathedral Street, Baltimore, Maryland,
has managed part of the equity portion of the Managed Growth Portfolio since
September 30, 1996. Brown Capital Management, Inc. believes that capital can
be enhanced in times of opportunity and preserved in times of adversity
without timing the market. The firm uses a bottom-up approach that
incorporates growth-adjusted price earnings. Stocks purchased are generally
undervalued and have momentum, have earnings-per-share growth rates greater
than the market, are more profitable than the market, and have relatively low
price-earnings ratios. The firm concentrates on mid-/large-cap growth stocks.

Asset management by Brown Capital Management, Inc. is by a team headed by
Eddie C. Brown. Eddie C. Brown, Portfolio Manager, is founder and President of
Brown Capital Management. He has over 23 years of investment experience,
having served as Vice President and Portfolio Manager for 10 years at T. Rowe
Price Associates immediately prior to starting his own firm. Mr. Brown holds a
BS in Electrical Engineering from Howard University, an MS in Business
Administration from the Indiana University School of Business. He is a
professionally-designated Chartered Financial Analyst and Chartered Investment
Counselor, and an inductee into the "Wall Street Week Hall of Fame," and a
member of The President's Roundtable.
    

CSIF Bond Portfolio
CAMCO utilizes a team approach to the management of the fixed-income assets of
the Bond Portfolio. CAMCO has actively managed these assets since March 1997.
Prior to this, the fixed-income assets were managed by US Trust as a
Subadvisor with CAMCO providing oversight. Reno J. Martini, Senior Vice
President and Chief Investment Officer, heads this team and oversees the
management of all Calvert portfolios for CAMCO. Mr. Martini has over 19 years
of experience in the securities industry and has been the head of the asset
management team since 1985.

CSIF Equity Portfolio
Loomis, Sayles & Company, L.P.
Loomis, Sayles & Company, L.P. is the Subadvisor to the Equity Portfolio. A
private investment counsel firm founded in 1926, Loomis, Sayles is organized
as a limited partnership, controlled by New England Mutual Life Insurance
Company. The principal business address of Loomis, Sayles is One Financial
Center, Boston, Massachusetts 02111.

   
Philip J. Schettewi, Managing Partner, Vice President, and Chief Portfolio
Strategist of Loomis, Sayles & Company, L.P., is the portfolio manager for the
Equity Portfolio. Mr. Schettewi is a Chartered Financial Analyst, and has 16
years experience in the investment business.
    

CWVF International Equity Fund
Murray Johnstone International, Ltd.
Murray Johnstone International, Ltd. ("Murray Johnstone") is the Subadvisor to
the CWVF International Equity Fund. Its principal business office in the US is
875 N. Michigan Avenue, Suite 3415, Chicago, Illinois 60611. CAMCO may manage
the US dollar portion of the Fund's cash reserves. CAMCO will continuously
monitor and evaluate the performance and investment style of the Subadvisor.
The Subadvisor is a wholly-owned subsidiary of United Asset Management Company.

Andrew Preston, International Equity's Portfolio Manager, studied at Melbourne
University in Australia and Ritsumeikan University in Japan prior to working
for the Australian Department of Foreign Affairs. He joined Murray Johnstone
in 1985, as an analyst in the UK and US departments, became Fund Manager in
the Japanese Department, played a prominent role in the establishment and
operation of Yamaichi-Murray Johnstone, and then began to support Murray
Johnstone's growing US business.

Calvert Social Investment Fund Advisory Fees

CAMCO receives a fee based on a percentage of CSIF's assets, and for the
Managed Growth and Equity Portfolios only, a performance (+ or -) fee as well.
From this, CAMCO pays the Subadvisors where applicable.

   
For its services during fiscal year 1997, CAMCO was entitled to and did
receive, pursuant to the Investment Advisory Agreement, 0.50% of the Money
Market Portfolio's average daily net assets. It also received 0.59% of the
Bond Portfolio's, 0.55% of the Equity Portfolio's (after performance
adjustment), and 0.60% of the Managed Growth Portfolio's (after performance
adjustment) average daily net assets as investment advisory fees. With respect
to the Bond Portfolio for the period March 1, 1997 to February 29, 2000, the
Advisor has voluntarily agreed to limit its investment advisory fee to 0.55%
of the Bond Portfolio's average daily net assets.
    

Investment selections for the fixed-income assets of the CSIF Managed Growth
Portfolio are made by CAMCO. The Subadvisors make the investment selections
for the remaining assets. Subadvisory fees are paid by CAMCO and are equal to
a base fee of 0.25% of the Managed Growth Portfolio's average daily net
assets, plus or minus a performance fee as set forth in the table above.
Payment (or subtraction) of a Performance Fee is conditioned on (1) the
performance of the Portfolio as a whole having exceeded (or trailed) The
Lipper Balanced Fund Index ("Fund Index") during the Performance Period; and
(2) payment of the Performance Fee not causing the Portfolio's performance to
fall below the Fund Index.

The Investment Advisory Agreement between CSIF and CAMCO, with respect to the
Managed Growth Portfolio, provides that CAMCO is entitled to a base annual fee
("Base Fee"), payable monthly, of 0.70% of the Portfolio's average daily net
assets. CAMCO may earn (or have its base fee reduced by) a performance
adjustment ("Performance Fee") based on the extent to which performance of the
Managed Growth Portfolio exceeds or trails the Relevant Index. The Relevant
Indices are as follows:

         CAMCO:                     Lehman Aggregate Bond Index
         NCM:                       Russell 3000
         Brown:                     Standard & Poor's 500 Stock Index

         Performance versus         Performance
         the Relevant Index         Fee Adjustment

         6% to less than 12%        0.05%
         12% to less than 18%       0.10%
         18% or more                0.15%

Loomis, Sayles makes investment selections for the Equity Portfolio. It
receives a subadvisory fee from CAMCO equal to a base fee of 0.25% of the
Equity Portfolio's average daily net assets, plus or minus a performance fee
as set forth in the table above. Loomis, Sayles also receives a 0.05% fee,
paid by CAMCO (not CSIF) for its assistance with the distribution of CSIF.

The Investment Advisory Agreement between CAMCO and CSIF, with respect to the
Equity Portfolio, provides that CAMCO is entitled to a base annual fee,
payable monthly, of 0.70% of the Portfolio's average daily net assets. CSIF
pays a monthly performance fee of plus or minus 0.20%, based on the extent to
which performance of the Equity Portfolio exceeds or trails the S&P's 500
Composite Index:

         Performance versus         Performance
         the S&P's 500              Fee Adjustment
         Composite Index

         6% to less than 12%        0.07%
         12% to less than 18%       0.14%
         18% or more                0.20%

   
Prior to March 1, 1997, US Trust made investment selections for the CSIF Bond
Portfolio pursuant to an Investment Subadvisory Agreement with CAMCO. For
fiscal 1997, CAMCO paid US Trust a fee of 0.20% of the assets of the Bond
Portfolio.
    

CWVF International Equity Fund Advisory Fees

   
The Investment Advisory Agreement between CWVF International Equity Fund and
CAMCO provides that CAMCO is entitled to an annual fee, payable monthly, of
1.00% of International Equity's average daily net assets. For the year ended
September 30, 1997, CAMCO received fees of 1.00% of the average daily net
assets. CAMCO may, in its discretion, defer its fees or assume International
Equity's operating expenses. The Investment Advisory Agreement provides that
CAMCO may later, to the extent permitted by law, recapture any fees it
deferred, or expenses it assumed during the two prior years. During the 1997
fiscal year, CAMCO did not recapture fees.

The Investment Subadvisory Agreement between CAMCO and Murray Johnstone
provides that Murray Johnstone is entitled to a subadvisory fee of 0.45% of
CWVF International Equity Fund's average daily net assets it manages. Murray
Johnstone's fee is paid by CAMCO, not CWVF. Murray Johnstone also receives a
0.05% fee, paid by CAMCO (not CWVF) for its assistance with the distribution
of CWVF International Equity Fund.
    

Calvert Distributors, Inc. serves as underwriter to market each Funds' shares.
Calvert Distributors, Inc. ("CDI") is the principal underwriter and
distributor for each Fund. Under the terms of its underwriting agreement with
the Funds, CDI markets and distributes the Funds' shares and is responsible
for preparing advertising and sales literature, and printing and mailing
prospectuses to prospective investors.

Calvert Administrative Services Company provides administrative services for
CWVF International Equity.
Calvert Administrative Services Company ("CASC"), an affiliate of CAMCO,
provides certain administrative services to International Equity, including
the preparation of regulatory filings and shareholder reports, the daily
determination of its net asset value per share and dividends, and the
maintenance of its portfolio and general accounting records. For providing such
services, CASC receives an annual fee, payable monthly, from CWVF
International Equity of 0.10% of its aggregate daily net assets, with a
minimum fee of $40,000 per year.

   
The transfer agent keeps your account records.
Calvert Shareholder Services, Inc. is the shareholder servicing agent for each
Fund. National Financial Data Services, Inc. ("NFDS"), 1004 Baltimore, Kansas
City, Missouri, 64105, is the transfer and dividend disbursing agent for each
Fund.
    

SHAREHOLDER GUIDE

Opening an account

You can buy shares of CSIF or CWVF in several ways which are described here
and in the chart below.

An account application accompanies this prospectus. A completed and signed
application is required for each new account you open, regardless of the
method you choose for making your initial investment. Additional forms may be
required from corporations, associations, and certain fiduciaries. If you have
any questions or need extra applications, call your broker, or Calvert Group
at 800-368-2748. Be sure to specify which Fund and class you wish to purchase.

To invest in any of Calvert's tax-deferred retirement plans, please call
Calvert Group at
800-368-2748 to receive information and the required separate application.

Alternative Sales Options
CSIF Managed Growth, CSIF Equity, and CWVF International Equity each offer two
classes of shares:
Class A Shares - Front-End Load Option
Class A shares are sold with a front-end sales charge at the time of purchase.
Class A shares are not subject to a sales charge when they are redeemed.

Class C shares - Level Load Option
Class C shares are sold without a sales charge at the time of purchase or
redemption.

Class C shares have higher expenses.
Each Portfolio bears some of the costs of selling its shares under
Distribution Plans adopted with respect to its Class A and Class C shares
pursuant to Rule 12b-1 under the 1940 Act. Payments under the Class A
Distribution Plan are limited to 0.35% annually of the average daily net asset
value of Class A shares, while payments under the Class C Distribution Plan
are 1.00% of the average daily net asset value of Class C shares.

Considerations for deciding which class of shares to buy.
Income distributions for Class A shares will probably be higher than those for
Class C shares, as a result of the distribution expenses described above. (See
also "Yield and Total Return.") You should consider Class A shares if you
qualify for a reduced sales charge under Class A or if you plan to hold the
shares for several years. Class C shares are not available for investments of
$1 million or more.

Class A Shares - CSIF Managed Growth, CSIF Equity, and CWVF International
Equity Portfolios
Class A shares are offered at net asset value plus a front-end sales charge as
follows:

                                                              Allowed to
                                    As a % of    As a % of    Brokers as
Amount of                           offering     net amount   a % of
Investment                          price        invested     offering price

Less than $50,000                   4.75%        4.99%        4.00%
$50,000 but less than $100,000      3.75%        3.90%        3.00%
$100,000 but less than $250,000     2.75%        2.83%        2.25%
$250,000 but less than $500,000     1.75%        1.78%        1.25%
$500,000 but less than $1,000,000   1.00%        1.01%        0.80%
$1,000,000 and over                 0.00%        0.00%        0.25%*


Bond Portfolio
Shares are offered at net asset value plus a front-end sales charge as follows:

                                                              Allowed to
                                    As a % of    As a % of    Brokers as
Amount of                           offering     net amount   a % of
Investment                          price        invested     offering price

Less than $50,000                   3.75%        3.90%        3.00%
$50,000 but less than $100,000      3.00%        3.09%        2.25%
$100,000 but less than $250,000     2.25%        2.30%        1.75%
$250,000 but less than $500,000     1.75%        1.78%        1.25%
$500,000 but less than $1,000,000   1.00%        1.01%        0.80%
$1,000,000 and over                 0.00%        0.00%        0.25%*

     *CDI  reserves  the right to recoup any  portion of the amount  paid to the
dealer if the investor  redeems some or all shares  within  twelve months of the
time of purchase.

CSIF Managed Growth, Bond and Equity Portfolios, and CWVF International Equity:

Front-end sales charges on shares may be reduced or eliminated in certain
cases. See Exhibit A to this prospectus.
The sales charge is paid to CDI, which in turn normally reallows a portion to
your broker/dealer. Upon written notice to brokers with whom it has dealer
agreements, CDI may reallow up to the full applicable sales charge. Brokers to
whom 90% or more of the entire sales charge is reallowed may be deemed to be
underwriters under the Securities Act of 1933.

In addition to any sales charge reallowance, your broker/dealer, or other
financial service firm through which your account is held, currently will be
paid periodic service fees at an annual rate of up to 0.25% of the average
daily net asset value of Class A shares of CSIF Managed Growth and Equity or
CWVF International Equity Portfolios and on shares of the Bond Portfolio held
in accounts maintained by that firm.

Class A Distribution Plan

   
CSIF and CWVF have adopted a Distribution Plan with respect to Class A shares
(the "Class A Distribution Plan"), which provides for payments at a maximum
annual rate of 0.35% (0.25% for the CSIF Money Market Portfolio) of the
average daily net asset value of Class A shares, to pay expenses associated
with the distribution and servicing of Class A shares. Amounts paid by the
Funds to CDI under the Class A Distribution Plan are used to pay to brokers
and others, including CDI salespersons who service accounts, service fees at
an annual rate of up to 0.25% of the average daily net asset value of Class A
shares, and to pay CDI for its marketing and distribution expenses, including,
but not limited to, preparation of advertising and sales literature and the
printing and mailing of prospectuses to prospective investors. For the fiscal
year ended September 30, 1997, the Managed Growth, Bond, and Equity Portfolios
of CSIF paid Class A Distribution Plan expenses of 0.24%, 0.20%, and 0.23% of
average net assets, respectively. CSIF Money Market Portfolio did not pay any
Distribution Plan expenses in fiscal 1997. For the same period, CWVF
International Equity paid Class A Distribution Plan expenses of 0.25% of
average net assets.
    

Class C Shares
CSIF Managed Growth and Equity Portfolios and CWVF International Equity
Class C shares are not available through all brokers. Class C shares are
offered at net asset value, without a front-end sales charge or a contingent
deferred sales charge. Class C expenses are higher than those of Class A.

Class C Distribution Plan

   
CSIF and CWVF have adopted a Distribution Plan with respect to Class C shares
(the "Class C Distribution Plan"), which provides for payments at an annual
rate of up to 1.00% of the average daily net asset value of Class C shares, to
pay expenses of the distribution and servicing of Class C shares. Amounts paid
by each Fund under the Class C Distribution Plan are currently used by CDI to
pay brokers and other selling firms quarterly compensation at an annual rate
of up to 0.75%, plus a service fee as described above under "Class A
Distribution Plan," of up to 0.25%, of the average daily net asset value of
each share sold by such others. For the 1997 fiscal year, the Class C
Distribution Plan expenses for CSIF Managed Growth and Equity Portfolios and
CWVF International Equity were 1.00% of average net assets for each.
    

Each of the Distribution Plans may be terminated at any time by vote of the
Independent Trustees/Directors or by vote of a majority of the outstanding
voting shares of the affected class. Brokers or others may receive different
levels of compensation depending on which class of shares they sell. Payments
pursuant to a Distribution Plan are included in the operating expenses of the
class.

Arrangements with Broker/Dealers and Others

CDI may also pay additional concessions, including non-cash promotional
incentives, such as merchandise or trips, to brokers employing registered
representatives who have sold or are expected to sell a minimum dollar amount
of shares of the Funds and/or shares of other Funds underwritten by CDI. CDI
may make expense reimbursements for special training of a broker's registered
representatives, advertising or equipment, or to defray the expenses of sales
contests. All such payments will be in compliance with NASD rules.

HOW TO BUY SHARES
(BE SURE TO SPECIFY WHICH CLASS YOU ARE BUYING)

Method            New Accounts                       Additional Investments

By Mail           $2,000 MINIMUM (CWVF)              $250 MINIMUM
                  $1,000 MINIMUM (CSIF)

                  Please make your check payable     Please make your check
payable
                  to the Fund and mail it            to the Fund and mail it
                  with your application to:          with your investment slip
to:

                  Calvert Group                      Calvert Group
                  P.O. Box 419544                    P.O. Box 419739
                  Kansas City, MO 64141-6544         Kansas City, MO 64141-6739

By Registered,    CALVERT GROUP                      CALVERT GROUP
Certified, or     C/O NFDS, 6TH FLOOR                C/O NFDS, 6TH FLOOR
Overnight Mail    1004 BALTIMORE                     1004 BALTIMORE
                  Kansas City, MO 64105-1807         Kansas City, MO 64105-1807

Through Your      $2,000 MINIMUM (CWVF)              $250 MINIMUM
Financial         $1,000 MINIMUM (CSIF)
Professional

AT THE CALVERT             Visit the Calvert Branch Office to make investments
OFFICE                     by check. See the back cover page for the address.

FOR ALL OPTIONS BELOW, PLEASE CALL YOUR FINANCIAL PROFESSIONAL OR CALVERT
GROUP AT 800-368-2745

By Exchange       $2,000 MINIMUM (CWVF)     $250 MINIMUM
                  $1,000 MINIMUM (CSIF)
(From your account in another Calvert Group fund)
WHEN OPENING AN ACCOUNT BY EXCHANGE, YOUR NEW ACCOUNT MUST BE ESTABLISHED WITH
THE SAME NAME(S), ADDRESS AND TAXPAYER IDENTIFICATION NUMBER AS YOUR EXISTING
CALVERT ACCOUNT.

By Bank Wire      $2,000 MINIMUM (CWVF)              $250 MINIMUM
                  $1,000 MIMIMUM (CSIF)

By Calvert        NOT AVAILABLE                      $50 MINIMUM
Money             FOR INITIAL INVESTMENT
Controller*

*Please allow sufficient time for Calvert Group to process your initial
request for this service, normally 10 business days. The maximum transaction
amount is $300,000, and your purchase request must be received by 4:00 p.m.
Eastern time.

NET ASSET VALUE

CSIF Money Market Portfolio shares are sold without a sales charge.
Money Market Portfolio: The price of one share is its "net asset value," or
"NAV." NAV is computed by adding the value of the Portfolio's investments plus
cash and other assets, deducting liabilities and then dividing the result by
the number of shares outstanding. The securities are valued according to the
"amortized cost" method, which is intended to stabilize the NAV at $1.00 per
share.

   
CSIF Managed Growth, Bond, and Equity Portfolios, and CWVF International
Equity Fund: Net asset value, or "NAV" refers to the worth of one share. NAV
is computed by adding the value of all portfolio holdings, plus other assets,
deducting liabilities and then dividing the result by the number of shares
outstanding. For Portfolios with more than one class of shares, the NAVs of
each class will vary daily depending on the number of shares outstanding for
each class.

Portfolio securities and other assets are valued based on market quotations,
except that securities maturing within 60 days are valued at amortized cost.
If quotations are not available, securities are valued by a method that the
particular Fund's Board of Trustees/Directors believes accurately reflects
fair value.
    

The NAV is calculated at the close of each business day, which coincides with
the closing of the regular session of the New York Stock Exchange (normally
4:00 p.m. Eastern time). Each Fund is open for business each day the New York
Stock Exchange is open. All purchases will be confirmed and credited to your
account in full and fractional shares (rounded to the nearest 1/1000 of a
share). The CSIF Money Market Portfolio may send monthly statements in lieu of
immediate confirmations of purchases and redemptions.

WHEN YOUR ACCOUNT WILL BE CREDITED

Before you buy shares, please read the following information to make sure your
investment is accepted and credited properly.

All of your purchases must be made in US dollars and checks must be drawn on
US banks. No cash will be accepted. The Funds reserve the right to suspend the
offering of shares for a period of time or to reject any specific purchase
order. If your check is not paid, your purchase will be canceled and you will
be charged a $10 fee plus costs incurred by the Funds. When you purchase by
check or with Calvert Money Controller, those funds will be on hold for up to
10 business days from the date of receipt. During that period, the proceeds of
redemptions against those funds will be held until the transfer agent is
reasonably satisfied that the purchase payment has been collected. Drafts
written on the CSIF Money Market Portfolio against such funds will be returned
for uncollected funds. To avoid this collection period, you can wire federal
funds from your bank, which may charge you a fee. As a convenience, check
purchases can be received at Calvert's offices for overnight mail delivery to
the transfer agent and will be credited the next business day, or upon
receipt. Any check purchase received without an investment slip may cause
delayed crediting.

CSIF Money Market Portfolio
Your purchase will be processed at the net asset value calculated after your
order is received and accepted. If your wire purchase is received by 5:00 p.m.
Eastern time, your account will begin earning dividends on the next business
day. Exchanges begin earning dividends the next business day after the
exchange request is received by mail or telephone. Purchases received by check
will begin earning dividends the next business day after they are processed to
the account.

   
CSIF Managed Growth, Bond, and Equity Portfolios and CWVF International Equity
Your purchase will be processed at the next offering price based on the next
net asset value calculated for the applicable shares after your order is
received and accepted.
    

Certain financial institutions or broker/dealers which have entered into a
sales agreement with the Distributor may enter confirmed purchase orders on
behalf of customers by phone, with payment to follow within a certain number
of days of the order as specified by the program. If payment is not received
in the time specified, the financial institution could be held liable for
resulting fees or losses.

EXCHANGES

Each exchange represents the sale of shares of one Portfolio and the purchase
of shares of another. Therefore, you could realize a taxable gain or loss on
the transaction.

If your investment goals change, the Calvert Group of Funds has a variety of
investment alternatives that includes common stock funds, tax-exempt and
corporate bond funds, and money market funds. The exchange privilege is a
convenient way to buy shares in other Calvert Group Funds in order to respond
to changes in your goals or in market conditions. Before you make an exchange
from a Fund or Portfolio, please note the following:

         Call your broker or a Calvert representative for information and a
prospectus for any of Calvert's other Funds registered in your state. Read the
prospectus of the Fund or Portfolio into which you want to exchange for
relevant information, including class offerings.

         Complete and sign an application for an account in that Fund or
Portfolio, taking care to register your new account in the same name and
taxpayer identification number as your existing Calvert account(s). Exchange
instructions may then be given by telephone if telephone redemptions have been
authorized and the shares are not in certificate form.

         You may exchange shares on which you have already paid a sales charge
at Calvert Group and shares acquired by reinvestment of dividends or
distributions into another fund at no additional charge. You may exchange
Class C shares for shares of another fund, but you will have to pay the
front-end sales charge, if applicable.

         Shareholders (and those managing multiple accounts) who make two
purchases and two exchange redemptions of shares of the same Portfolio during
any 6-month period will be given written notice that they may be prohibited
from making additional investments. This policy does not prohibit a
shareholder from redeeming shares of any Fund, and does not apply to trades
solely among money market funds.

         For purposes of the exchange privilege, the Funds are related to
Summit Cash Reserves Fund by investment and investor services. The Funds
reserve the right to terminate or modify the exchange privilege in the future
upon 60 days' written notice.

OTHER CALVERT GROUP SERVICES

Calvert Information Network
24 hour yield and prices.

   
Calvert has round-the-clock telephone service and a website at
http://www.calvertgroup.com that lets existing customers obtain prices,
yields, account balances, and, by telephone only, authorize certain
transactions.
    

Calvert Money Controller
Calvert Money Controller eliminates the delay of mailing a check or the
expense of wiring funds. You can request this free service on your application.

This service allows you to authorize electronic transfers of money to purchase
or sell shares. You use Calvert Money Controller like an "electronic check" to
move money ($50 to $300,000) between your bank account and your Calvert Group
account with one phone call. Allow one or two business days after the call for
the transfer to take place; for money recently invested, allow normal check
clearing time (up to 10 business days) before redemption proceeds are sent to
your bank. You may also arrange systematic monthly or quarterly investments
(minimum $50) into your Calvert Group account. After you give us proper
authorization, your bank account will be debited to purchase shares. A debit
entry will appear on your bank statement. If you would like to make
arrangements for systematic monthly or quarterly redemptions from your Calvert
Group account, call your broker or Calvert for more information.

Telephone Transactions
Calvert may record all telephone calls.

   
If you have telephone transaction privileges, you may purchase, redeem, or
exchange shares, wire funds and use Calvert Money Controller by telephone. You
automatically have telephone privileges unless you elect otherwise. The Funds,
the transfer agent, the shareholder servicing agent, and their affiliates are
not liable for acting in good faith on telephone instructions relating to your
account, so long as they follow reasonable procedures to determine that the
telephone instructions are genuine. Such procedures may include recording the
telephone calls and requiring some form of personal identification. You should
verify the accuracy of telephone transactions immediately upon receipt of your
confirmation statement.
    

Optional Services
Complete the account application for the easiest way to establish services.

The easiest way to establish optional services on your Calvert Group account
is to select the options you desire when you complete your account
application. If you wish to add other options later, you may have to provide
us with additional information and a signature guarantee. Please call your
broker or Calvert Investor Relations at 800-368-2745 for further assistance.
For our mutual protection, we may require a signature guarantee on certain
written transaction requests. A signature guarantee verifies the authenticity
of your signature, and may be obtained from any bank, savings and loan
association, credit union, trust company, broker/dealer firm or member of a
domestic stock exchange. A signature guarantee cannot be provided by a notary
public.

Householding of General Mailings
Householding reduces expenses while saving paper and postage expense.

   
If you have multiple accounts with Calvert, you may receive combined mailings
of some shareholder information, such as statements, confirmations,
prospectuses, semi-annual and annual reports. Please contact Calvert Investor
Relations at 800-368-2745 to receive additional copies of information.
    

Special Services and Charges
The Funds pay for shareholder services but not for special services that are
required by a few shareholders, such as a request for a historical transcript
of an account. You may be required to pay a research fee for these special
services.

If you are purchasing shares of a Fund through a program of services offered
by a broker/dealer or financial institution, you should read the program
materials in conjunction with this Prospectus. Certain features may be
modified in these programs, and administrative charges may be imposed by the
broker/dealer or financial institution for the services rendered.

Tax-Saving Retirement Plans
Contact Calvert Group for complete information kits discussing the plans, and
their benefits, provisions and fees.
Calvert Group can set up your new account under one of several tax-deferred
plans. These plans let you invest for retirement and shelter your investment
income from current taxes. Minimums may differ from those listed in the "How
to Buy Shares" chart. Also, reduced sales charges may apply. See "Exhibit A -
Reduced Sales Charges."

   
         Traditional and Roth individual retirement accounts (IRAs): available
to anyone who has earned income. You may also be able to make investments in
the name of your spouse, if your spouse has no earned income.

         Qualified Profit-Sharing and Money Purchase Plans (including 401(k)
Plans): available to self-employed people and their partners, corporations and
their employees, and certain tax-exempt organizations.
    

         Simple IRAs and Simplified Employee Pension Plan (SEP-IRA): available
to self-employed people and their partners, or to corporations.

         403(b)(7) Custodial Accounts: available to employees of most
non-profit organizations and public schools and universities.

SELLING YOUR SHARES

You may redeem all or a portion of your shares on any business day. Your
shares will be redeemed at the next net asset value calculated after your
redemption request is received and accepted. See below for specific
requirements necessary to make sure your redemption request is acceptable.
Remember that the Funds may hold payment on the redemption of your shares
until reasonably satisfied that investments made by check or by Calvert Money
Controller have been collected (normally up to 10 business days).

Redemption Requirements To Remember
To ensure acceptance of your redemption request, please follow the procedures
described here and below.
Once your shares are redeemed, the proceeds will normally be sent to you on
the next business day, but if making immediate payment could adversely affect
the Funds, it may take up to seven (7) days. Calvert Money Controller
redemptions generally will be credited to your bank account on the second
business day after your phone call. When the New York Stock Exchange is closed
(or when trading is restricted) for any reason other than its customary
weekend or holiday closings, or under any emergency circumstances as
determined by the Securities and Exchange Commission, redemptions may be
suspended or payment dates postponed.

CSIF Money Market Portfolio
If you sell shares by telephone or written request, you will receive dividends
through the date the request is received and processed. If you write a draft
to sell shares, the shares will earn dividends until the draft is presented to
the Portfolio to be paid.

   
Minimum account balance is $1,000 per Portfolio.
Please maintain a balance in each of your accounts of at least $1,000. If the
balance in your CSIF Money Market account falls below the $1,000 minimum
during a month, a $3 fee will be charged to your account. This fee is paid to
the portfolio to offset the generally higher costs of small dollar accounts.
Accounts in other portfolios which have a balance of less than $1,000 may be
closed and the proceeds mailed to the address of record. You will be given a
notice that your account is below the minimum and closed after 30 days if the
balance is not brought up to the required minimum amount.
    

HOW TO SELL YOUR SHARES

Draftwriting (CSIF Money Market Portfolio only)
You may redeem shares in your CSIF Money Market Portfolio account by writing a
draft for at least $250. If you complete and return the signature card for
Draftwriting, the Portfolio will mail bank drafts to you, printed with your
name and address. Generally, there is no charge to you for the maintenance of
this service or the clearance of drafts, but CSIF Money Market will charge a
service fee for drafts returned for insufficient funds. CSIF Money Market will
charge $25 for any stop payment on drafts. As a service to shareholders,
shares may be automatically transferred between your Calvert accounts to cover
drafts you have written. The signature of only one authorized signer is
required to honor a draft.

   
By Mail To: Calvert Group P.O. Box 419544 Kansas City, MO 64141-6544.
You may redeem available shares from your account at any time by sending a
letter of instruction, including your name, account and Portfolio number, the
number of shares or dollar amount, and where you want the money to be sent.
Additional requirements, below, may apply to your account. The letter of
instruction must be signed by all required authorized signers. If you want the
money to be wired to a bank not previously authorized, a voided bank check
must be enclosed with your letter. To add instructions to wire to a
destination not previously established, or if you would like funds sent to a
different address or another person, your letter must be signature guaranteed.
    

Type of Registration       Requirements

Corporations,     Letter of instruction and corporate resolution, signed by
Associations      person(s) authorized to act on the account, accompanied
                  by signature guarantee(s).

Trusts            Letter of instruction signed by the Trustee(s) (as
Trustees), with a signature guarantee. (If the Trustee's name is not
registered on your account, provide a copy of the trust document, certified
within the last 60 days.)

By Telephone
Please call 800-368-2745. You may redeem shares from your account by telephone
and have your money mailed to your address of record or wired to a bank you
have previously authorized. A charge of $5 is imposed on wire transfers of
less than $1,000. See "Telephone Transactions."

   
Calvert Money Controller - Automatic Investment Plan
Please allow sufficient time for Calvert Group to process your initial request
for this service (normally 10 business days). You may also authorize automatic
fixed amount redemptions by Calvert Money Controller. All requests must be
received by 4:00 p.m. (Eastern time). Accounts cannot be closed by this
service.
    

Exchange to Another Calvert Group Fund
You must meet the minimum investment requirement of the other Calvert Group
Fund or Portfolio. You can only exchange between accounts with identical
names, addresses and taxpayer identification number, unless previously
authorized with a signature-guaranteed letter.

Systematic Check Redemptions
If you maintain an account with $10,000 or more, you may have up to two (2)
redemption checks sent to you on the 15th of each month, simply by sending a
letter with all the information, including your account number, and the dollar
amount ($100 minimum). If you would like a regular check mailed to another
person or place, your letter must be signature guaranteed.

Through your Broker
If your account is held in your broker's name ("street name"), you should
contact your broker directly to transfer, exchange or redeem shares.

DIVIDENDS AND TAXES

Each year, the Funds distribute substantially all of the net investment income
to shareholders.

Dividends from CSIF Money Market Portfolio's net investment income are accrued
daily and paid monthly. The CSIF Managed Growth Portfolio pays dividends
quarterly, CSIF Bond Portfolio pays dividends monthly, and CSIF Equity
Portfolio and CWVF International Equity Fund pay dividends annually. Net
investment income consists of interest income, net short-term capital gains,
if any, and dividends declared and paid on investments, less expenses.
Distributions of net short-term capital gains (treated as dividends for tax
purposes) and net long-term capital gains, if any, are normally paid once a
year; however, the Funds do not anticipate making any such distributions
unless available capital loss carryovers have been used or have expired.
Dividend and distribution payments will vary between classes; dividend
payments are anticipated to be generally higher for Class A shares.

   
Dividend payment options (available monthly or quarterly)
Dividends and any distributions are automatically reinvested in the same
Portfolio at net asset value (no sales charge), unless you elect to have the
dividends of $10 or more paid in cash (by check or by Calvert Money
Controller). Dividends and distributions from any Calvert Group Fund or
Portfolio may be automatically invested in an identically registered account
with the same account number in any other Calvert Group Fund at net asset
value. If reinvested in the same Fund account, new shares will be purchased at
net asset value on the reinvestment date, which is generally 1 to 3 days prior
to the payment date. You must notify the Funds in writing to change your
payment options. If you elect to have dividends and/or distributions paid in
cash, and the US Postal Service cannot deliver the check, or if it remains
uncashed for six months, it, as well as future dividends and distributions,
will be reinvested in additional shares. No dividends will accrue on amounts
represented by uncashed distribution or redemption checks.
    

"Buying a Dividend"
At the time of purchase, the share price of each class of CSIF Managed Growth,
Bond, and Equity Portfolios and CWVF International Equity Fund may reflect
undistributed income, capital gains or unrealized appreciation of securities.
Any income or capital gains from these amounts which are later distributed to
you are fully taxable. On the record date for a distribution, share value is
reduced by the amount of the distribution. If you buy shares just before the
record date ("buying a dividend") you will pay the full price for the shares
and then receive a portion of the price back as a taxable distribution.

Federal Taxes
In January, each Portfolio will mail you Form 1099-DIV indicating the federal
tax status of dividends and any capital gain distributions paid to you during
the past year. Generally, dividends and distributions are taxable in the year
they are paid. However, any dividends and distributions paid in January but
declared during the prior three months are taxable in the year declared.
Dividends and distributions are taxable to you regardless of whether they are
taken in cash or reinvested. Dividends, including short-term capital gains,
are taxable as ordinary income. Distributions from long-term capital gains are
taxable as long-term capital gains, regardless of how long you have owned
shares.

CSIF Managed Growth, Bond, and Equity Portfolios and CWVF International Equity
You may realize a capital gain or loss when you sell or exchange shares. This
capital gain or loss will be short- or long-term, depending on how long you
have owned the shares which were sold. In January, the Portfolios will mail
you Form 1099-B indicating the total amount of all sales, including exchanges.
You should keep your annual year-end account statements to determine the cost
(basis) of the shares to report on your tax returns.

Other Tax Information
In addition to federal taxes, you may be subject to state or local taxes on
your investment, depending on the laws in your area. You will be notified to
the extent, if any, that dividends reflect interest received from US
government securities. Such dividends may be exempt from certain state income
taxes.

Taxpayer Identification Number
If we do not have your correct Social Security or Taxpayer Identification
Number ("TIN") and a signed certified application or Form W-9, Federal law
requires us to withhold 31% of your dividends, and possibly 31% of certain
redemptions. In addition, you may be subject to a fine. You will also be
prohibited from opening another account by exchange. If this TIN information
is not received within 60 days after your account is established, your account
may be redeemed (closed) at the current NAV on the date of redemption. Calvert
Group reserves the right to reject any new account or any purchase order for
failure to supply a certified TIN.

EXHIBIT A
REDUCED SALES CHARGES (CLASS A ONLY)

You may qualify for a reduced sales charge through several purchase plans
available. You must notify the Funds at the time of purchase to take advantage
of the reduced sales charge.
Right of Accumulation
The sales charge breakpoints are calculated by taking into account not only
the dollar amount of a new purchase of shares, but also the higher of cost or
current value of shares previously purchased in Calvert Group Funds that
impose sales charges. This automatically applies to your account for each new
purchase.

Letter of Intent
If you plan to purchase $50,000 or more of Fund shares over the next 13
months, your sales charge may be reduced through a "Letter of Intent." You pay
the lower sales charge applicable to the total amount you plan to invest over
the 13-month period, excluding any money market fund purchases. Part of your
shares will be held in escrow, so that if you do not invest the amount
indicated, you will have to pay the sales charge applicable to the smaller
investment actually made. For more information, see the SAI.

Group Purchases
If you are a member of a qualified group, you may purchase shares at the
reduced sales charge applicable to the group taken as a whole. The sales
charge is calculated by taking into account not only the dollar amount of the
shares you purchase, but also the higher of cost or current value of shares
previously purchased and currently held by other members of your group.

A "qualified group" is one which:
1.       has been in existence for more than six months,
2.       has a purpose other than acquiring shares at a discount, and
3.       satisfies uniform criteria which enable CDI and brokers offering
shares to realize economies of scale in distributing such shares.

A qualified group must have more than 10 members, must be available to arrange
for group meetings between representatives of CDI or brokers distributing
shares, must agree to include sales and other materials related to the Funds
in its publications and mailings to members at reduced or no cost to CDI or
brokers.

Pension plans may not qualify participants for group purchases; however, such
plans may qualify for reduced sales charges under a separate provision (see
below). Members of a group are not eligible for a Letter of Intent.

Retirement Plans Under Section 457, Section 403(b)(7), or Section 401(k)
There is no sales charge on shares purchased for the benefit of a retirement
plan under section 457 of the Internal Revenue Code of 1986, as amended
("Code"), or for a plan qualifying under section 403(b)(7) of the Code if, at
the time of purchase, Calvert Group has been notified in writing that the
403(b)(7) plan has at least 200 eligible employees. Furthermore, there is no
sales charge on shares purchased for the benefit of a retirement plan
qualifying under section 401(k) of the Code if, at the time of such purchase,
the 401(k) plan administrator has notified Calvert Group in writing that a)
its 401(k) plan has at least 200 eligible employees; or b) the cost or current
value of shares the plan has in Calvert Group of Funds (except money market
funds) is at least $1 million.

Neither the Funds, nor CDI, nor any affiliate thereof will reimburse a plan or
participant for any sales charges paid prior to receipt of such written
communication and confirmation by Calvert Group. Plan administrators should
send requests for the waiver of sales charges based on the above conditions
to: Calvert Group Retirement Plans, 4550 Montgomery Avenue, Suite 1000N,
Bethesda, Maryland 20814.

   
Other Circumstances
There is no sales charge on shares of any fund or portfolio of the Calvert
Group of Funds sold to (i) current or retired Directors, Trustees, or Officers
of the Calvert Group of Funds, employees of Calvert Group, Ltd. and its
affiliates, or their family members; (ii) CSIF Advisory Council Members,
directors, officers, and employees of any subadvisor for the Calvert Group of
Funds, employees of broker/dealers distributing the Fund's shares and
immediate family members of the Council, subadvisor, or broker/dealer; (iii)
Purchases made through a Registered Investment Advisor, (iv) Trust departments
of banks or savings institutions for trust clients of such bank or
institution, (v) Purchases through a broker maintaining an omnibus account
with the fund or portfolio, provided the purchases are made by (a) investment
advisors or financial planners placing trades for their own accounts (or the
accounts of their clients) and who charge a management, consulting, or other
fee for their services; or (b) clients of such investment advisors or
financial planners who place trades for their own accounts if such accounts
are linked to the master account of such investment advisor or financial
planner on the books and records of the broker or agent; or (c) retirement and
deferred compensation plans and trusts, including, but not limited to, those
defined in section 401(a) or section 403(b) of the I.R.C., and "rabbi trusts."
    

Established Accounts
Shares of the CSIF Managed Growth Portfolio may be sold at net asset value to
you if your account was established on or before July 17, 1986.

Dividends and Capital Gain Distributions from other Calvert Group Funds
You may prearrange to have your dividends and capital gain distributions from
another Calvert Group Fund automatically invested in another account with no
additional sales charge.

Purchases made at net asset value ("NAV")
Except for money market funds, if you make a purchase at NAV, you may exchange
that amount to another fund at no additional sales charge.

Reinstatement Privilege
If you redeem shares and then within 30 days decide to reinvest in the same
Fund or Portfolio, you may do so at the net asset value next computed after
the reinvestment order is received, without a sales charge. You may use the
reinstatement privilege only once. The Funds reserve the right to modify or
eliminate this privilege.

   
Prospectus
January 31, 1998
    

CALVERT SOCIAL INVESTMENT FUND
CALVERT INTERNATIONAL EQUITY FUND

To Open an Account:
800-368-2748

Performance and Prices:
Calvert Information Network
24 hours, 7 days a week
800-368-2745

Service for Existing Account:
Shareholders 800-368-2745
Brokers 800-368-2746

TDD for Hearing-Impaired:
800-541-1524

Branch Office:
4550 Montgomery Avenue
Suite 1000N
Bethesda, Maryland 20814

Registered, Certified or
Overnight Mail:
Calvert Group
c/o NFDS, 6th Floor
1004 Baltimore
Kansas City, MO 64105

Calvert Group Website
http://www.calvertgroup.com

Principal Underwriter
Calvert Distributors, Inc.
4550 Montgomery Avenue
Suite 1000N
Bethesda, Maryland 20814

<PAGE>

                         Calvert Social Investment Fund


   
                      Statement of Additional Information
                                January 31, 1998
    



INVESTMENT ADVISOR
Calvert Asset Management Company, Inc.
4550 Montgomery Avenue
Suite 1000N
Bethesda, Maryland 20814

   
SHAREHOLDER SERVICE                     TRANSFER AGENT
Calvert Shareholder Services, Inc.      National Financial Data Services, Inc.
4550 Montgomery Avenue                  1004 Baltimore
Suite 1000N                             6th Floor
Bethesda, Maryland 20814                Kansas City, Missouri 64105
    

PRINCIPAL UNDERWRITER                   INDEPENDENT ACCOUNTANTS
Calvert Distributors, Inc.              Coopers & Lybrand, L.L.P.
4550 Montgomery Avenue                  250 West Pratt Street
Suite 1000N                             Baltimore, Maryland 21201
Bethesda, Maryland 20814




                        TABLE OF CONTENTS

       Investment Objectives and Policies                    1
       Investment Restrictions                               7
       Investment Selection Process                          8
       Dividends and Taxes                                   9
       Net Asset Value                                      10
       Calculation of Yield and Total Return                11
       Purchase and Redemption of Shares                    14
       Reduced Sales Charges (Class A)                      15
       Advertising                                          15
       Trustees, Officers and Advisory Council              16
       Investment Advisor                                   18
       Method of Distribution                               19
       Transfer and Shareholder Servicing Agents            20
       Portfolio Transactions                               21
       Independent Accountants and Custodians               21
       General Information                                  21
       Financial Statements                                 22
       Control Persons and Principal Holders of Securities  22
       Appendix                                             22


   
STATEMENT OF ADDITIONAL INFORMATION-January 31, 1998
    

                         CALVERT SOCIAL INVESTMENT FUND
                4550 Montgomery Avenue, Bethesda, Maryland 20814

     New Account    (800) 368-2748          Shareholder
     Information:   (301) 951-4820          Services:     (800) 368-2745
     Broker         (800) 368-2746          TDD for the Hearing-
     Services:      (301) 951-4850          Impaired:     (800) 541-1524

   
         This   Statement  of  Additional   Information  is  not  a  prospectus.
Investors  should read the Statement of Additional  Information  in  conjunction
with the Fund's  Prospectus,  dated January 31, 1998, which may be obtained free
of charge by writing the Fund at the above address or calling the Fund.
    

                       INVESTMENT OBJECTIVES AND POLICIES

         Calvert  Social  Investment  Fund (the  "Fund") is  designed to provide
opportunities  for  individual  and  institutional  investors,  including  ERISA
fiduciaries,  seeking growth of capital or current income through  investment in
enterprises  that make a  significant  contribution  to  society  through  their
products  and  services  and through the way they do  business.  The Fund offers
investors a choice of four separate  portfolios  selected with a concern for the
social  impact of each  investment:  the Money  Market  Portfolio,  the  Managed
Growth Portfolio, the Equity Portfolio and the Bond Portfolio.
         The Money  Market  Portfolio  seeks to  provide  the  highest  level of
current  income,  consistent  with  liquidity,  safety  and  stability,  through
investment  in  money  market  instruments,   including   securities  issued  or
guaranteed by agencies of the U.S.  Government  and repurchase  agreements  with
banks and brokers secured by such  instruments,  selected in accordance with the
Fund's  investment and social  criteria.  The Money Market Portfolio is designed
for  short-term  cash  management  and  for  investors   needing   stability  of
principal.  The Money  Market  Portfolio  seeks to maintain a constant net asset
value of $1.00  per  share.  Shares of the Money  Market  Portfolio  are sold at
their net asset value per share which is not subject to a sales charge.
         The Managed  Growth  Portfolio  seeks to achieve a total  return  above
the rate of  inflation  through an actively  managed,  diversified  portfolio of
common and  preferred  stocks,  bonds and money market  instruments  which offer
income and capital growth  opportunity  without  extreme  risk-taking  and which
best satisfy the  investment  and social  concern  criteria  established  by the
Fund.  It  is  the  Managed  Growth  Portfolio's   investment   philosophy  that
long-term  favorable  investment  performance  is  provided by  companies  which
combine  sound  business  policies  and  circumstances  with  social and ethical
values.
         The Equity  Portfolio  seeks growth of capital  through  investment  in
the  equity  securities  of  issuers  within   industries   perceived  to  offer
opportunities  for potential  capital  appreciation and which satisfy the Fund's
investment and social  criteria.  It is the  philosophy of the Equity  Portfolio
that favorable  investment  performance  is provided by companies  which combine
sound business policies and circumstances with social and ethical values.
         The Bond  Portfolio  seeks to provide as high a level of current income
as  is  believed  to  be  consistent  with  prudent   investment  risk,  through
investment in bonds and other  straight debt  securities,  selected  pursuant to
the Fund's  investment and social criteria.  An additional  objective is to seek
preservation  of  shareholders'  capital.  It is  the  philosophy  of  the  Bond
Portfolio that favorable  investment  performance is provided by companies which
combine  sound  business  policies  and  circumstances  with  social and ethical
values.
         There  can  be,  of  course,   no  assurance  that  the  Fund  will  be
successful  in  meeting  its  investment  objective  or that  the  Money  Market
Portfolio will maintain a constant net asset value of $1.00 per share.

Foreign Securities
         Each  Portfolio  may invest up to 25% of its  assets in the  securities
of foreign  issuers.  The Money Market Portfolio may purchase only high quality,
U.S.  dollar-denominated  instruments.  Investments  in foreign  securities  may
present risks not typically involved in domestic investments.
         Additional  costs may be  incurred  in  connection  with  international
investment  since  foreign   brokerage   commissions  and  the  custodial  costs
associated with maintaining  foreign  portfolio  securities are generally higher
than in the  United  States.  Fee  expense  may  also be  incurred  on  currency
exchanges  when the Fund  changes  investments  from one  country  to another or
converts foreign securities holdings into U.S. dollars.
         United States Government  policies have at times, in the past,  through
imposition of interest  equalization taxes and other  restrictions,  discouraged
certain  investments  abroad by United  States  investors.  While  such taxes or
restrictions  are not presently in effect,  they may be  reinstituted  from time
to time as a means of fostering a favorable  United States  balance of payments.
In addition,  foreign  countries may impose  withholding  and taxes on dividends
and interest.
         Since  investments  in  securities  of  issuers  domiciled  in  foreign
countries  usually involve  currencies of the foreign  countries,  and since the
Fund may temporarily hold funds in foreign  currencies  during the completion of
investment  programs,  the value of the assets of the Fund as measured in United
States  dollars may be affected  favorably or  unfavorably by changes in foreign
currency exchange rates and exchange control  regulations.  For example,  if the
value of the foreign  currency in which a security is  denominated  increases or
declines  in  relation  to the  value  of the  U.S.  dollar,  the  value  of the
security in U.S.  dollars  will  increase or decline  correspondingly.  The Fund
will  conduct  its  foreign  currency  exchange  transactions  either  on a spot
(i.e.,  cash) basis at the spot rate prevailing in the foreign  exchange market,
or  through  entering  into  forward  contracts  to  purchase  or  sell  foreign
currencies.  A forward  foreign  currency  contract  involves an  obligation  to
purchase  or sell a specific  currency  at a future  date which may be any fixed
number of days from the date of the contract  agreed upon by the  parties,  at a
price  set at the  time of the  contract.  These  contracts  are  traded  in the
interbank  market  conducted  directly  between currency traders (usually large,
commercial  banks) and their  customers.  A forward  foreign  currency  contract
generally  has no deposit  requirement,  and no  commissions  are charged at any
stage for trades.
         The Fund may enter into  forward  foreign  currency  contracts  for two
reasons.  First,  the Fund may desire to preserve the United States dollar price
of a security  when it enters  into a  contract  for the  purchase  or sale of a
security  denominated  in a foreign  currency.  The Fund may be able to  protect
itself  against  possible  losses  resulting  from  changes in the  relationship
between  the United  States  dollar  and  foreign  currencies  during the period
between  the  date  the  security  is  purchased  or sold  and the date on which
payment  is made  or  received  by  entering  into a  forward  contract  for the
purchase or sale,  for a fixed  amount of dollars,  of the amount of the foreign
currency involved in the underlying security transactions.
         Second,  when the Advisor  believes  that the  currency of a particular
foreign  country may suffer a  substantial  decline  against  the United  States
dollar,  the Fund enters into a forward foreign  currency  contract to sell, for
a fixed  amount of dollars,  the amount of foreign  currency  approximating  the
value of some or all of the  Fund's  portfolio  securities  denominated  in such
foreign  currency.   The  precise  matching  of  the  forward  foreign  currency
contract  amounts and the value of the  portfolio  securities  involved will not
generally be possible  since the future value of the  securities  will change as
a  consequence  of market  movements  between the date the  forward  contract is
entered into and the date it matures.  The  projection  of  short-term  currency
market  movement is difficult,  and the successful  execution of this short-term
hedging  strategy is uncertain.  Although  forward  foreign  currency  contracts
tend to  minimize  the risk of loss due to a decline  in the value of the hedged
currency,  at the same time they tend to limit any  potential  gain which  might
result should the value of such currency  increase.  The Fund does not intend to
enter  into such  forward  contracts  under  this  circumstance  on a regular or
continuous basis.

Foreign Money Market Instruments
         The Money  Market  Portfolio  may invest  without  limitation  in money
market   instruments   of  banks,   whether   foreign  or  domestic,   including
obligations  of U.S.  branches  of  foreign  banks  ("Yankee"  instruments)  and
obligations of foreign branches of U.S. banks  ("Eurodollar"  instruments).  All
such instruments must be high-quality,  U.S. dollar-denominated  obligations. It
is an  operating  (i.e.,  non-fundamental)  policy  of the Fund  that the  Money
Market  Portfolio  may invest only in foreign money market  instruments  if they
are of comparable  quality to the obligations of domestic banks.  Although these
instruments  are not  subject  to  foreign  currency  risk  since  they are U.S.
dollar-denominated,   investments  in  foreign  money  market   instruments  may
involve  risks  that  are  different  than  investments  in  securities  of U.S.
issuers. See "Foreign Securities" above.

Private Placements and Illiquid Securities
         Due to the particular  social objective of the Fund,  opportunities may
exist to  promote  especially  promising  approaches  to  social  goals  through
privately placed investments.  The private placement  investments  undertaken by
the Fund,  if any,  may be subject to a high  degree of risk.  Such  investments
may involve  relatively  small and untried  enterprises  that have been selected
in  the  first  instance  because  of  some  attractive   social  objectives  or
policies.  The Investment  Advisors seek to structure the Fund's  investments to
provide the greatest  assurance of attaining the intended  investment return. It
is an  operating  policy  of the  Fund  that  no  private  placements  shall  be
acquired  for a  Portfolio  until  the  value  of that  Portfolio's  investments
exceeds $20 million.
         Many private  placement  investments  have no readily  available market
and may  therefore  be  considered  illiquid.  Securities  eligible  for  resale
pursuant  to Rule 144A under the  Securities  Act of 1933 may be  determined  by
the Board of Trustees to be liquid.  The Board may delegate such  determinations
of  liquidity  to the  Advisor,  pursuant to  guidelines  and  oversight  by the
Board.  Fund  investments in private  placements and other  securities for which
market  quotations are not readily  available are valued at fair market value as
determined by the Advisor under the direction and control of the Board.

Repurchase Agreements
         The  Fund  may  purchase   debt   securities   subject  to   repurchase
agreements which are  arrangements  under which the Fund buys a security and the
seller  simultaneously  agrees to  repurchase  the security at a specified  time
and price  reflecting a market rate of interest.  The Fund engages in repurchase
agreements  in order to earn a higher  rate of return  than it could earn simply
by  investing  in  the  obligation  which  is  the  subject  of  the  repurchase
agreement.  Repurchase  agreements are not, however,  without risk. In the event
of the  bankruptcy  of a seller  during the term of a  repurchase  agreement,  a
legal  question  exists as to whether  the Fund would be deemed the owner of the
underlying  security or would be deemed only to have a security  interest in and
lien upon such  security.  The Fund will only  engage in  repurchase  agreements
with  recognized  securities  dealers and banks  determined  to present  minimal
credit risk by the Advisor  under the direction  and  supervision  of the Fund's
Board of  Trustees.  In  addition,  the Fund  will  only  engage  in  repurchase
agreements   reasonably  designed  to  secure  fully  during  the  term  of  the
agreement  the seller's  obligation to repurchase  the  underlying  security and
will  monitor the market  value of the  underlying  security  during the term of
the agreement.  If the value of the underlying  security  declines and is not at
least equal to the  repurchase  price due the Fund  pursuant  to the  agreement,
the Fund will  require  the seller to pledge  additional  securities  or cash to
secure  the  seller's  obligations  pursuant  to the  agreement.  If the  seller
defaults  on its  obligation  to  repurchase  and the  value  of the  underlying
security  declines,  the Fund may incur a loss and may incur expenses in selling
the underlying  security.  Repurchase  agreements are always for periods of less
than one year.  Repurchase  agreements  not  terminable  within  seven  days are
considered illiquid.

Reverse Repurchase Agreements
         The Fund may also  engage in  reverse  repurchase  agreements.  Under a
reverse repurchase  agreement,  the Fund sells portfolio securities to a bank or
securities  dealer and agrees to repurchase  those securities from such party at
an agreed upon date and price  reflecting  a market rate of  interest.  The Fund
invests the proceeds from each reverse  repurchase  agreement in  obligations in
which it is  authorized  to  invest.  The Fund  intends  to enter into a reverse
repurchase  agreement  only  when  the  interest  income  provided  for  in  the
obligation  in which the Fund  invests  the  proceeds  is expected to exceed the
amount the Fund will pay in interest to the other  party to the  agreement  plus
all costs associated with the  transactions.  The Fund does not intend to borrow
for leverage  purposes.  The Portfolios  will only be permitted to pledge assets
to the extent necessary to secure borrowings and reverse repurchase agreements.
         During the time a reverse  repurchase  agreement  is  outstanding,  the
Fund will  maintain in a segregated  custodial  account an amount of cash,  U.S.
Government  securities or other liquid,  high-quality  debt securities  equal in
value to the  repurchase  price.  The Fund  will  mark to  market  the  value of
assets held in the segregated  account,  and will place additional assets in the
account  whenever  the  total  value  of the  account  falls  below  the  amount
required under applicable regulations.
         The Fund's  use of  reverse  repurchase  agreements  involves  the risk
that the other party to the  agreements  could become  subject to  bankruptcy or
liquidation  proceedings  during the period the agreements are  outstanding.  In
such event,  the Fund may not be able to repurchase  the  securities it has sold
to that other party.  Under those  circumstances,  if at the  expiration  of the
agreement  such  securities  are of greater value than the proceeds  obtained by
the Fund  under the  agreements,  the Fund may have been  better  off had it not
entered  into  the  agreement.   However,  the  Fund  will  enter  into  reverse
repurchase  agreements  only with banks and dealers  which the Advisor  believes
present  minimal  credit risks under  guidelines  adopted by the Fund's Board of
Trustees.  In addition,  the  Portfolio  bears the risk that the market value of
the  securities  sold  by  the  Portfolio  may  decline  below  the  agreed-upon
repurchase  price,  in which case the dealer may request the  Portfolio  to post
additional collateral.

Non-Investment Grade Debt Securities
         The  Managed  Growth,  Bond and Equity  Portfolios  may invest in lower
quality  debt  securities  (generally  those  rated  BB or lower by S&P or Ba or
lower by  Moody's,  commonly  known  as "junk  bonds"),  subject  to the  Fund's
investment  policy  which  provides  that they may not  invest  more than 20% of
their  respective  assets in securities  rated below B by either rating service,
or  in  unrated  securities  determined  by  the  Advisor  to be  comparable  to
securities  rated  below B by  either  rating  service.  These  securities  have
moderate  to poor  protection  of  principal  and  interest  payments  and  have
speculative  characteristics.  (See Appendix for a description  of the ratings.)
These  securities  involve  greater  risk of  default or price  declines  due to
changes   in  the   issuer's   creditworthiness   than   investment-grade   debt
securities.  Because the market for  lower-rated  securities  may be thinner and
less  active  than  for  higher-rated  securities,  there  may be  market  price
volatility  for these  securities  and limited  liquidity in the resale  market.
Market  prices for these  securities  may  decline  significantly  in periods of
general  economic  difficulty or rising interest rates.  Unrated debt securities
may fall into the lower quality  category.  Unrated  securities  usually are not
attractive to as many buyers as rated  securities  are, which may make them less
marketable.
         The quality  limitation  set forth in the Fund's  investment  policy is
determined  immediately  after  the  Fund's  acquisition  of a  given  security.
Accordingly,   any  later  change  in  ratings  will  not  be  considered   when
determining whether an investment complies with the Fund's investment policy.
         When  purchasing  high-yielding  securities,   rated  or  unrated,  the
Advisors  prepare  their own  careful  credit  analysis  to attempt to  identify
those issuers whose financial  condition is adequate to meet future  obligations
or is expected to be adequate in the future.  Through portfolio  diversification
and credit  analysis,  investment risk can be reduced,  although there can be no
assurance that losses will not occur.

Options and Futures Contracts
         The  Managed  Growth,  Bond and Equity  Portfolios  may,  in pursuit of
their  respective  investment  objectives,  purchase  put and call  options  and
engage in the  writing  of covered  call  options  and  secured  put  options on
securities  which  meet the  Fund's  social  criteria,  and  employ a variety of
other investment techniques.  Specifically,  these Portfolios may also engage in
the  purchase  and  sale of  stock  index  future  contracts,  foreign  currency
futures  contracts,  interest  rate  futures  contracts,  and  options  on  such
futures, as described more fully below.
         These  Portfolios  may  engage in such  transactions  only to hedge the
existing  positions in the respective  Portfolios.  They will not engage in such
transactions  for the  purposes of  speculation  or  leverage.  Such  investment
policies  and  techniques  may  involve  a greater  degree  of risk  than  those
inherent in more conservative investment approaches.
         Each  of  these  Portfolios  may  purchase  a put  or  call  option  on
securities  (including  a straddle  or spread)  only if the value of that option
premium,  when  aggregated  with the premiums on all other options on securities
held by the  Portfolio,  does not  exceed 5% of the  Portfolio's  total  assets.
Further,  as an  operating  policy,  which may be  changed  without  shareholder
approval,  none of the  Portfolios  intends to enter into  futures  contracts or
options  on futures  contracts  if the  aggregate  initial  margin and  premiums
required to establish  these  positions  would exceed 5% of the  Portfolio's net
assets.  These Portfolios may write "covered  options" on securities in standard
contracts traded on national  securities  exchanges.  These Portfolios may write
such  options in order to receive the  premiums  from options that expire and to
seek net gains from closing purchase transactions with respect to such options.

Put and Call Options.  These  Portfolios  may purchase put and call options,  in
standard  contracts traded on national  securities  exchanges,  on securities of
issuers which meet the Fund's social  criteria.  These  Portfolios will purchase
such  options  only to hedge  against  changes  in the value of  securities  the
Portfolios  hold and not for the purposes of speculation or leverage.  By buying
a put, a Portfolio  has the right to sell the  security at the  exercise  price,
thus  limiting  its risk of loss  through a decline in the  market  value of the
security until the put expires.  The amount of any  appreciation in the value of
the  underlying  security will be partially  offset by the amount of the premium
paid  for the put  option  and  any  related  transaction  costs.  Prior  to its
expiration,  a put  option  may be sold in a closing  sale  transaction  and any
profit or loss from the sale will  depend on  whether  the  amount  received  is
more or  less  than  the  premium  paid  for the put  option  plus  the  related
transaction costs.
         These  Portfolios  may purchase call options on  securities  which they
may  intend  to  purchase  and  which  meet the  Fund's  social  criteria.  Such
transactions  may be  entered  into in order to limit the risk of a  substantial
increase in the market  price of the  security  which the  Portfolio  intends to
purchase.  Prior to its expiration,  a call option may be sold in a closing sale
transaction.  Any  profit or loss from such a sale will  depend on  whether  the
amount  received is more or less than the premium  paid for the call option plus
the related transaction costs.

Covered  Options.  These Portfolios may write only covered options on equity and
debt securities in standard contracts traded on national  securities  exchanges.
This  means  that,  in the  case of call  options,  so  long as a  Portfolio  is
obligated  as  the  writer  of a  call  option,  that  Portfolio  will  own  the
underlying  security  subject to the  option  and,  in the case of put  options,
that Portfolio  will,  through its custodian,  deposit and maintain  either cash
or  securities  with a market value equal to or greater than the exercise  price
of the option.
         When a Portfolio  writes a covered call  option,  the  Portfolio  gives
the  purchaser  the right to purchase  the  security at the call option price at
any time  during  the life of the  option.  As the  writer  of the  option,  the
Portfolio  receives a premium,  less a commission,  and in exchange foregoes the
opportunity  to profit  from any  increase in the market  value of the  security
exceeding  the call option price.  The premium  serves to mitigate the effect of
any  depreciation  in the market  value of the  security.  Writing  covered call
options can increase  the income of the  Portfolio  and thus reduce  declines in
the net asset value per share of the  Portfolio  if  securities  covered by such
options  decline in value.  Exercise of a call option by the  purchaser  however
will  cause  the  Portfolio  to forego  future  appreciation  of the  securities
covered by the option.
         When a Portfolio  writes a covered  put  option,  it will gain a profit
in the amount of the  premium,  less a  commission,  so long as the price of the
underlying  security  remains above the exercise price.  However,  the Portfolio
remains  obligated to purchase  the  underlying  security  from the buyer of the
put  option  (usually  in the event the price of the  security  falls  below the
exercise  price)  at any time  during  the  option  period.  If the price of the
underlying  security falls below the exercise  price,  the Portfolio may realize
a loss in the amount of the  difference  between the exercise price and the sale
price of the security, less the premium received.
         These  Portfolios  may  purchase  securities  which may be covered with
call  options  solely  on  the  basis  of  considerations  consistent  with  the
investment  objectives and policies of the Fund and the affected Portfolio.  The
Portfolio's  turnover may increase  through the exercise of a call option;  this
will generally occur if the market value of a "covered"  security  increases and
the portfolio has not entered into a closing purchase transaction.
         Risks Related to Options  Transactions.  The  Portfolios  can close out
their  respective  positions  in  exchange-traded  options  only on an  exchange
which provides a secondary  market in such options.  Although  these  Portfolios
intend to  acquire  and write  only such  exchange-traded  options  for which an
active  secondary  market appears to exist,  there can be no assurance that such
a market will exist for any particular  option contract at any particular  time.
This might  prevent  the  Portfolios  from  closing an options  position,  which
could impair the  Portfolios'  ability to hedge  effectively.  The  inability to
close out a call  position may have an adverse  effect on liquidity  because the
Portfolio  may be required to hold the  securities  underlying  the option until
the option expires or is exercised.

Futures   Transactions.   These   Portfolios   may  purchase  and  sell  futures
contracts,  but only when, in the judgment of the Advisor,  such a position acts
as a hedge against  market changes which would  adversely  affect the securities
held  by the  Portfolios.  These  futures  contracts  may  include,  but are not
limited to, market index futures  contracts and futures  contracts based on U.S.
Government obligations.
         A futures  contract  is an  agreement  between  two  parties to buy and
sell a  security  on a future  date  which has the  effect of  establishing  the
current  price for the  security.  Although  futures  contracts  by their  terms
require  actual  delivery  and  acceptance  of  securities,  in most  cases  the
contracts  are  closed  out before the  settlement  date  without  the making or
taking of delivery  of  securities.  Upon buying or selling a futures  contract,
the Portfolio  deposits initial margin with its custodian,  and thereafter daily
payments  of  maintenance  margin  are made to and from  the  executing  broker.
Payments  of  maintenance  margin  reflect  changes in the value of the  futures
contract,  with the  Portfolio  being  obligated  to make such  payments  if its
futures  position  becomes less  valuable and entitled to receive such  payments
if its positions become more valuable.
         These  Portfolios  may only invest in futures  contracts to hedge their
respective  existing  investment  positions  and  not  for  income  enhancement,
speculation or leverage purposes.  Although some of the securities  underlying a
futures contract may not necessarily  meet the Fund's social criteria,  any such
hedge  position  taken  by  these   Portfolios  will  not  constitute  a  direct
ownership interest in the underlying securities.
         Futures   contracts   are   designed  by  boards  of  trade  which  are
designated  "contracts  markets" by the  Commodity  Futures  Trading  Commission
("CFTC").  As series of a registered  investment  company,  the  Portfolios  are
eligible  for  exclusion   from  the  CFTC's   definition  of  "commodity   pool
operator,"  meaning that the  Portfolios may invest in futures  contracts  under
specified  conditions without  registering with the CFTC. Among these conditions
are  requirements  that  to the  extent  that a  Portfolio  enters  into  future
contracts  and options on futures  positions  that are not for bona fide hedging
purposes (as defined by the CFTC),  the  aggregate  initial  margin and premiums
on these  positions  (excluding the amount by which options are  "in-the-money")
may not exceed 5% of the  Portfolio's  net assets.  Futures  contracts  trade on
contracts  markets in a manner  that is  similar to the way a stock  trades on a
stock  exchange and the boards of trade,  through their  clearing  corporations,
guarantee performance of the contracts.

Options on Futures  Contracts.  These  Portfolios  may purchase and write put or
call  options and sell call  options on futures  contracts  in which a Portfolio
could  otherwise  invest  and which are  traded on a U.S.  exchange  or board of
trade. The Portfolios may also enter into closing  transactions  with respect to
such options to terminate  an existing  position;  that is, to sell a put option
already  owned and to buy a call option to close a position  where the Portfolio
has already sold a corresponding call option.
         The  Portfolios  may only  invest in options on  futures  contracts  to
hedge  their  respective  existing  investment  positions  and  not  for  income
enhancement,  speculation or leverage purposes.  Although some of the securities
underlying the futures  contract  underlying the option may not necessarily meet
the Fund's social  criteria,  any such hedge position taken by these  Portfolios
will not constitute a direct ownership interest in the underlying securities.
         An option on a futures  contract  gives the  purchaser  the  right,  in
return for the premium paid, to assume a position in a futures  contract-a  long
position  if the  option  is a call  and a short  position  if the  option  is a
put-at a specified  exercise  price at any time during the period of the option.
The  Portfolios  will pay a  premium  for such  options  purchased  or sold.  In
connection  with such options bought or sold,  the Portfolios  will make initial
margin  deposits and make or receive  maintenance  margin payments which reflect
changes in the market  value of such  options.  This  arrangement  is similar to
the margin arrangements applicable to futures contracts described above.

Put  Options  on  Futures  Contracts.  The  purchase  of put  options on futures
contracts is analogous to the sale of futures  contracts  and is used to protect
the  portfolio  against  the risk of  declining  prices.  These  Portfolios  may
purchase  put  options  and sell  put  options  on  futures  contracts  that are
already  owned  by that  Portfolio.  The  Portfolios  will  only  engage  in the
purchase of put  options  and the sale of covered  put  options on market  index
futures for hedging purposes.

Call  Options  on  Futures  Contracts.  The  sale of  call  options  on  futures
contracts is analogous to the sale of futures  contracts  and is used to protect
the  portfolio  against  the risk of  declining  prices.  The  purchase  of call
options  on  futures  contracts  is  analogous  to  the  purchase  of a  futures
contract.  These  Portfolios  may  only buy call  options  to close an  existing
position where the Portfolio has already sold a  corresponding  call option,  or
for a cash hedge.  The  Portfolios  will only engage in the sale of call options
and the purchase of call options to cover for hedging purposes.

Writing  Call  Options  on Futures  Contracts.  The  writing of call  options on
futures  contracts  constitutes a partial hedge against  declining prices of the
securities  deliverable  upon exercise of the futures  contract.  If the futures
contract  price at expiration is below the exercise  price,  the Portfolio  will
retain the full  amount of the option  premium  which  provides a partial  hedge
against  any  decline  that  may have  occurred  in the  Portfolio's  securities
holdings.

Risks of Options  and Futures  Contracts.  If one of these  Portfolios  has sold
futures or takes  options  positions to hedge its portfolio  against  decline in
the market and the market later  advances,  the  Portfolio  may suffer a loss on
the futures  contracts or options which it would not have  experienced if it had
not hedged.  Correlation  is also imperfect  between  movements in the prices of
futures  contracts  and  movements  in  prices of the  securities  which are the
subject  of the  hedge.  Thus the price of the  futures  contract  or option may
move more than or less than the price of the  securities  being hedged.  Where a
Portfolio has sold futures or taken options  positions to hedge against  decline
in the market,  the market may advance and the value of the  securities  held in
the  Portfolio  may decline.  If this were to occur,  the  Portfolio  might lose
money on the futures  contracts or options and also  experience a decline in the
value of its  portfolio  securities.  However,  although  this might occur for a
brief period or to a slight  degree,  the value of a diversified  portfolio will
tend to move in the direction of the market generally.
         The Portfolios  can close out futures  positions only on an exchange or
board of trade which provides a secondary  market in such futures.  Although the
Portfolios  intend to  purchase  or sell only such  futures  for which an active
secondary  market  appears  to  exist,  there  can be no  assurance  that such a
market will exist for any particular  futures  contract at any particular  time.
This might prevent the Portfolios from closing a futures  position,  which could
require a Portfolio  to make daily cash  payments  with  respect to its position
in the event of adverse price movements.
         Options on futures  transactions  bear  several  risks apart from those
inherent in options  transactions  generally.  The Portfolios'  ability to close
out their  options  positions in futures  contracts  will depend upon whether an
active  secondary  market for such  options  develops and is in existence at the
time the  Portfolios  seek to close their  positions.  There can be no assurance
that such a market will develop or exist.  Therefore,  the  Portfolios  might be
required to exercise the options to realize any profit.

                            INVESTMENT RESTRICTIONS

Fundamental Investment Restrictions
         The Fund has  adopted  the  following  investment  restrictions  which,
together with the foregoing  investment  objectives and fundamental  policies of
a  Portfolio,  cannot be  changed  without  the  approval  of the  holders  of a
majority of the  outstanding  shares of the  affected  Portfolio.  As defined in
the  Investment  Company  Act of 1940,  this means the lesser of the vote of (a)
67% of the  shares  of the  Portfolio  at a meeting  where  more than 50% of the
outstanding  shares  are  present  in person or by proxy or (b) more than 50% of
the  outstanding  shares  of the  Portfolio.  Shares  have  equal  rights  as to
voting,  except that only shares of a Portfolio  are entitled to vote on matters
affecting  only  that  Portfolio  (such  as  changes  in  investment  objective,
policies or restrictions). None of the Portfolios may:

         1.       Purchase   securities   of  any  issuer  (other  than
         obligations   of,  or   guaranteed   by,  the  United   States
         Government,  its  agencies  or  instrumentalities)  if,  as  a
         result,  more than 5% of the value of that  Portfolio's  total
         assets would be invested in securities of that issuer.
         2.       Concentrate  more  than  25%  of  the  value  of  its
         assets in any one industry;  provided,  however, that there is
         no  limitation  with  respect to  investments  in  obligations
         issued or guaranteed  by the United  States  Government or its
         agencies  and  instrumentalities,  and  repurchase  agreements
         secured  thereby,   and  in  the  case  of  the  Money  Market
         Portfolio,   there   is  no   limitation   with   respect   to
         investments in money market instruments of banks.
         3.       Purchase  more  than  10% of the  outstanding  voting
         securities  of any issuer.  In  addition,  the Fund may not in
         the  aggregate  purchase  more  than  10% of  the  outstanding
         voting securities of any issuer.
         4.       Purchase  the  securities  of any  issuer  with  less
         than three years' continuous  operation if, as a result,  more
         than 5% of the value of that  Portfolio's  total  assets would
         be invested in securities of such issuers.
         5.       Make loans other than  through the  purchase of money
         market  instruments  and  repurchase   agreements  or  by  the
         purchase of bonds,  debentures or other debt  securities.  The
         purchase  by a  Portfolio  of all or a portion  of an issue of
         publicly  or  privately   distributed   debt   obligations  in
         accordance  with  its  investment   objective,   policies  and
         restrictions, shall not constitute the making of a loan.
         6.       Underwrite the securities of other issuers.
         7.       Purchase  from or sell to any of the Fund's  officers
         or Trustees,  or firms of which any of them are  members,  any
         securities  (other than capital  stock of the Fund),  but such
         persons  or  firms  may  act  as  brokers  for  the  Fund  for
         customary commissions.
         8.       Borrow  money,  except  from banks for  temporary  or
         emergency  purposes  and then  only in an  amount up to 10% of
         the  value of that  Portfolio's  total  assets  and  except by
         engaging   in   reverse   repurchase   agreements;   provided,
         however,   that  a  Portfolio   may  only  engage  in  reverse
         repurchase  agreements  so long as,  at the  time a  Portfolio
         enters  into a reverse  repurchase  agreement,  the  aggregate
         proceeds  from  outstanding  reverse  repurchase   agreements,
         when added to other outstanding  borrowings  permitted by this
         section,  do not  exceed  33  1/3%  of the  Portfolio's  total
         assets.  In order  to  secure  any  permitted  borrowings  and
         reverse  repurchase   agreements  under  this  section,   each
         Portfolio may pledge, mortgage or hypothecate its assets.
         9.       Make  short  sales  of  securities  or  purchase  any
         securities  on  margin  except  as  provided  for the  Managed
         Growth,  Equity and Bond  Portfolios  with respect to options,
         futures contracts and options on futures contracts.
         10.      Write,  purchase or sell puts,  calls or combinations
         thereof  except as  provided  for the Managed  Growth,  Equity
         and  Bond   Portfolios   with  respect  to  options,   futures
         contracts and options on futures contracts.
         11.      Invest  for the  purpose  of  exercising  control  or
         management of another issuer.
         12.      Invest   in    commodities,    commodities    futures
         contracts,   or  real  estate,   although  it  may  invest  in
         securities  which are  secured by real  estate or real  estate
         mortgages  and  securities  of issuers which invest or deal in
         commodities,  commodity  futures,  real  estate or real estate
         mortgages  and provided  that the Managed  Growth,  Equity and
         Bond  Portfolios  may  purchase or sell stock  index  futures,
         foreign  currency  futures,  interest rate futures and options
         thereon.
         13.      Invest in  interests  in oil,  gas, or other  mineral
         exploration  or development  programs,  although it may invest
         in  securities  of issuers  which  invest in or  sponsor  such
         programs.
         14.      Purchase or retain  securities  issued by  investment
         companies  except to the extent  permitted  by the  Investment
         Company Act of 1940,  as  amended,  and in  connection  with a
         trustee's/director's deferred compensation plan.

   
Non-Fundamental Investment Restrictions
         The Fund has adopted the following  operating  (i.e.,  non-fundamental)
investment  policies  and  restrictions  which  may be  changed  by the Board of
Trustees without shareholder approval. None of the Portfolios may:
         15.      Purchase the  obligations  of foreign  issuers if, as
         a result,  such  securities  would  exceed 25% of the value of
         that Portfolio's assets.
         16.      Purchase  illiquid  securities  if more  than  15% of
         the value of that  Portfolio's  net assets  would be  invested
         in such securities (10% limitation for CSIF Money Market).
    

         Any  investment  restriction  which  involves a maximum  percentage  of
securities  or assets shall not be  considered  to be violated  unless an excess
over the  applicable  percentage  occurs  immediately  after an  acquisition  of
securities or utilization of assets and results therefrom.

                          INVESTMENT SELECTION PROCESS

         Investments  in the Fund are selected on the basis of their  ability to
contribute  to the dual  objective  of the Fund,  (i.e.,  those that satisfy the
Fund's  investment  and social  criteria).  The Fund has  developed  a number of
techniques  for  evaluating  the  performance of issuers in each of these areas.
The  primary  sources  of  information  are  reports  published  by the  issuers
themselves,  the reports of public  agencies,  and the  reports of groups  which
monitor  performance  in  particular  areas.  These sources of  information  are
sometimes augmented with direct interviews or written  questionnaires  addressed
to the issuers. It should be recognized,  however,  that there are few generally
accepted   measures  by  which   achievement  in  these  areas  can  be  readily
distinguished;  therefore,  the development of suitable  measurement  techniques
is largely within the discretion and judgment of the Advisors of the Fund.
         In  making   selections  for  the  Managed  Growth,   Equity  and  Bond
Portfolios,  the  Advisors  determine  and evaluate  the  appropriate  portfolio
composition  on the basis of asset  prices and the  perceived  consequences  and
probabilities  of various  economic  outcomes.  Individual  securities  are then
evaluated as  candidates  to fulfill the  Portfolio's  investment  objective and
policies.  Securities  remain candidates for inclusion in the Portfolios only if
their prices and other  characteristics  indicate  that they have the  potential
to perform in a way that is  representative  of their class of securities  under
the different economic outcomes considered more probable by the Advisors.
         Candidates  for  inclusion in any  particular  class of assets are then
examined  according to the social  criteria.  Issuers are classified  into three
categories of suitability  under the social criteria.  In the first category are
those issuers  which exhibit  unusual  positive  accomplishment  with respect to
some of the criteria and do not fail to meet minimum  standards  with respect to
the remaining criteria.  To the greatest extent possible,  investment selections
are made from this group.  In the second  category are those  issuers which meet
minimum  standards  with  respect  to  all  the  criteria  but  do  not  exhibit
outstanding   accomplishment  with  respect  to  any  criterion.  This  category
includes  issuers  which may lack an  affirmative  record of  accomplishment  in
these  areas but which are not known by  Advisors  to violate  any of the social
criteria.  The third  category  under the social  criteria  consists  of issuers
which flagrantly  violate,  or have violated,  one or more of those values,  for
example,  a company  which  repeatedly  engages in unfair labor  practices.  The
Fund will not  knowingly  purchase  the  securities  of  issuers  in this  third
category.
         It should be noted that the Fund's  social  criteria  tend to limit the
availability  of  investment  opportunities  more than is  customary  with other
investment  companies.  The Advisors of the Fund,  however,  believe that within
the first and second  categories there are sufficient  investment  opportunities
to permit  full  investment  among  issuers  which  satisfy  the  Fund's  social
investment objective.
         To the greatest  extent  possible,  the Advisors  apply the same social
criteria  to the  purchase  of  non-equity  securities  as it  applies to equity
investments.  With respect to government securities,  the Money Market Portfolio
invests  primarily  in debt  obligations  issued or  guaranteed  by  agencies or
instrumentalities  of the  Federal  Government  whose  purposes  further  or are
compatible  with the Fund's social  criteria,  such as  obligations  of the Bank
for  Cooperatives  and the  Student  Loan  Marketing  Association,  rather  than
general  obligations  of the Federal  Government,  such as Treasury  securities.
Bank  certificates of deposit,  commercial  paper,  repurchase  agreements,  and
corporate  bonds are  judged in the same way as a  prospective  purchase  of the
bank's or issuing  company's  common  stock.  The Fund may invest,  however,  in
certificates  of deposit of banks and  savings  and loan  associations  in which
the Fund would not otherwise  invest  because such  institutions  have assets of
$1 billion or less,  but generally only to the extent all such  investments  are
fully insured as to principal by the Federal Deposit Insurance Corporation.
         Obligations issued by the U.S.  Treasury,  such as U.S. Treasury bills,
notes  and  bonds,  are  supported  by the full  faith  and  credit  of the U.S.
Government.  Certain  obligations  issued  or  guaranteed  by a U.S.  Government
agency or  instrumentality  are  supported  by the full  faith and credit of the
U.S.  Government.  These include  obligations issued by the Export-Import  Bank,
Farmers Home Administration,  Government National Mortgage  Association,  Postal
Service,  Merchant Marine,  and Washington  Metropolitan Area Transit Authority.
The Fund may also  invest in other  U.S.  Government  agency or  instrumentality
obligations   which  are  supported   only  by  the  credit  of  the  agency  or
instrumentality  and may be  further  supported  by the  right of the  issuer to
borrow from the U.S.  Treasury.  Such obligations  include  securities issued by
the Bank for  Cooperatives,  Federal  Intermediate  Credit  Bank,  Federal  Land
Bank,  Federal  Home Loan Bank,  Federal  Home Loan  Mortgage  Corporation,  and
Federal National Mortgage Association.

                              DIVIDENDS AND TAXES

         It is the policy of the Equity  Portfolio to declare and pay  dividends
from net  investment  income  on an  annual  basis.  It is the Bond  Portfolio's
policy to declare  and pay  dividends  from net  investment  income on a monthly
basis. The Managed Growth  Portfolio  declares and pays dividends on a quarterly
basis.  Dividends  and  distributions  may differ among the  classes.  The Money
Market  Portfolio   accrues  daily  and  pays  monthly   dividends  of  its  net
investment  income to its  shareholders  of  record as of the close of  business
each day.  Distributions  of realized  net capital  gains,  if any, are normally
paid  once a  year;  however,  the  Fund  does  not  intend  to  make  any  such
distributions  unless available capital loss carryovers,  if any, have been used
or have expired.
         Generally,   dividends   (including   short-term   capital  gains)  and
distributions  are  taxable  to the  shareholder  in the  year  they  are  paid.
However,  any dividends and  distributions  paid in January but declared  during
the prior three months are taxable in the year declared.
         The Fund is required to withhold  31% of any  dividends  and  long-term
capital  gain  distributions  paid  and  31%  of  each  redemption   transaction
occurring  in the  Managed  Growth,  Equity  and  Bond  Portfolios  if:  (a) the
shareholder's  social  security number or other taxpayer  identification  number
("TIN") is not  provided or an  obviously  incorrect  TIN is  provided;  (b) the
shareholder  does not certify  under  penalties of perjury that the TIN provided
is the  shareholder's  correct  TIN and that the  shareholder  is not subject to
backup  withholding  under section  3406(a)(1)(C)  of the Internal  Revenue Code
because of underreporting  (however,  failure to provide certification as to the
application of section  3406(a)(1)(C)  will result only in backup withholding on
dividends,  not on  redemptions);  or (c) the Fund is notified  by the  Internal
Revenue  Service that the TIN provided by the  shareholder  is incorrect or that
there has been  underreporting  of interest  or  dividends  by the  shareholder.
Affected  shareholders will receive statements at least annually  specifying the
amount withheld.
         In  addition,  the Fund is required to report to the  Internal  Revenue
Service the following  information  with respect to each redemption  transaction
occurring  in  the  Managed  Growth,   Equity  and  Bond  Portfolios:   (a)  the
shareholder's  name,  address,   account  number  and  taxpayer   identification
number;  (b) the  total  dollar  value of the  redemptions;  and (c) the  Fund's
identifying CUSIP number.
         Certain  shareholders are, however,  exempt from the backup withholding
and broker reporting  requirements.  Exempt shareholders include:  corporations;
financial institutions;  tax-exempt organizations;  individual retirement plans;
the U.S.,  a State,  the  District of  Columbia,  a U.S.  possession,  a foreign
government,  an  international  organization,   or  any  political  subdivision,
agency or instrumentality of any of the foregoing;  U.S. registered  commodities
or securities  dealers;  real estate investment  trusts;  registered  investment
companies;  bank common trust funds; certain charitable trusts;  foreign central
banks of issue.  Non-resident  aliens,  certain foreign partnerships and foreign
corporations  are  generally not subject to either  requirement  but may instead
be subject to withholding  under  sections 1441 or 1442 of the Internal  Revenue
Code.  Shareholders  claiming  exemption  from  backup  withholding  and  broker
reporting should call or write the Fund for further information.
         Many  states do not tax the  portion of the Fund's  dividends  which is
derived  from  interest  on  U.S.  Government  obligations.   State  law  varies
considerably   concerning  the  tax  status  of  dividends   derived  from  U.S.
Government  obligations.  Accordingly,  shareholders  should  consult  their tax
advisors  about the tax status of dividends and  distributions  from the Fund in
their respective jurisdictions.
         Dividends  paid by the Fund may be eligible for the dividends  received
deduction  available  to corporate  taxpayers.  Information  concerning  the tax
status of dividends and distributions and the amount of dividends  withheld,  if
any, is mailed annually to Fund shareholders.
         Investors  should  note  that  they  may be  required  to  exclude  the
initial sales  charge,  if any, paid on the purchase of Fund shares from the tax
basis of those  shares  if the  shares  are  exchanged  for  shares  of  another
Calvert  Group Fund within 90 days of purchase.  This  requirement  applies only
to the extent that the  payment of the  original  sales  charge on the shares of
the Fund  causes a  reduction  in the  sales  charge  otherwise  payable  on the
shares of the Calvert  Group Fund  acquired in the  exchange,  and investors may
treat sales charges  excluded from the basis of the original  shares as incurred
to acquire the new shares.

                                NET ASSET VALUE

   
         Shares of the Money  Market  Portfolio  are issued and  redeemed at the
net asset value per share of the  Portfolio.  The public  offering  price of the
shares of the Managed  Growth,  Equity and Bond Portfolios is the respective net
asset value per share (plus,  for Class A shares,  the applicable sales charge).
Shares of the Managed  Growth,  Equity and Bond Portfolios are redeemed at their
respective net asset values per share.  The Money Market  Portfolio  attempts to
maintain a constant  net asset  value of $1.00 per share;  the net asset  values
of the  Managed  Growth,  Equity  and  Bond  Portfolios  fluctuate  based on the
respective  market  value of the  Portfolios'  investments.  The net asset value
per share of each of the  Portfolios  is  determined  every  business day at the
close of the New York Stock Exchange  (normally  4:00 p.m.  Eastern time) and at
such  other  times  as may be  necessary  or  appropriate.  The  Fund  does  not
determine  net asset value on certain  national  holidays or other days on which
the New York Stock Exchange is closed:  New Year's Day,  Martin Luther King Day,
Presidents'  Day,  Good  Friday,  Memorial  Day,  Independence  Day,  Labor Day,
Thanksgiving  Day,  and  Christmas  Day.  Each  Portfolio's  net asset value per
share is  determined  per class by  dividing  its total net assets (the value of
its assets  net of  liabilities,  including  accrued  expenses  and fees) by the
number of shares outstanding for that class.
         The  assets of the  Managed  Growth,  Equity  and Bond  Portfolios  are
valued as  follows:  (a)  securities  for which  market  quotations  are readily
available  are valued at the most recent  closing  price,  mean  between bid and
asked price,  or yield  equivalent  as obtained  from one or more market  makers
for such  securities;  (b) securities  maturing  within 60 days may be valued at
cost,  plus or minus any  amortized  discount  or  premium,  unless the Board of
Trustees  determines such method not to be appropriate under the  circumstances;
and (c) all other  securities  and assets for which  market  quotations  are not
readily  available  will be fairly valued by the Advisor in good faith under the
supervision of the Board of Trustees.
         The Money Market Portfolio's  assets,  including  securities subject to
repurchase  agreements,  are normally  valued at their amortized cost which does
not take  into  account  unrealized  capital  gains  or  losses.  This  involves
valuing  an  instrument  at  its  cost  and   thereafter   assuming  a  constant
amortization  to maturity of any discount or premium,  regardless  of the impact
of  fluctuating  interest  rates on the market  value of the  instrument.  While
this method  provides  certainty in valuation,  it may result in periods  during
which  value,  as  determined  by  amortized  cost,  is higher or lower than the
price that would be received upon sale of the instrument.
         Rule 2a-7 under the  Investment  Company  Act of 1940  permits the Fund
to  value  the  Money  Market  Portfolio's  assets  at  amortized  cost  if  the
Portfolio  maintains a  dollar-weighted  average maturity of 90 days or less and
only purchases  obligations  having  remaining  maturities of 13 months or less.
Rule 2a-7 requires,  as a condition of its use, that the Money Market  Portfolio
invest only in  obligations  determined  by the  Trustees to be of good  quality
with minimal  credit  risks and  requires  the Trustees to establish  procedures
designed  to  stabilize,  to the extent  reasonably  possible,  the  Portfolio's
price per share as computed for the purpose of sales and  redemptions  at $1.00.
Such  procedures  include review of the Portfolio's  investment  holdings by the
Trustees,  at such intervals as they may deem appropriate,  to determine whether
the   Portfolio's  net  asset  value   calculated  by  using  available   market
quotations  or  equivalents  deviates  from $1.00 per share  based on  amortized
cost. If such  deviation  exceeds  0.50%,  the Trustees  will promptly  consider
what action,  if any,  will be  initiated.  In the event the Trustees  determine
that a deviation  exists  which may result in material  dilution or other unfair
results to  investors  or existing  shareholders,  the  Trustees  will take such
corrective  action as they regard as necessary and appropriate,  including:  the
sale of  portfolio  instruments  prior to maturity to realize  capital  gains or
losses or to shorten average  portfolio  maturity;  the withholding of dividends
or payment of  distributions  from  capital or  capital  gains;  redemptions  of
shares in kind; or the  establishment  of a net asset value per share based upon
available market quotations.
    

Net Asset Value and Offering Price Per Share

   
CSIF Money Market Portfolio
         ($166,110,561/166,162,505 shares)                    $1.00

CSIF Managed Growth Portfolio
         Net asset value per share
         ($675,306,495/19,361,689 shares)                     $34.88
         Maximum sales charge, Class A
         (4.75% of offering price)                              1.74
         Offering price per share, Class A                    $36.62

         Class C net asset value and offering price per share
         ($8,897,500/257,731shares)                  $34.52

CSIF Bond Portfolio
         Net asset value per share
         ($59,656,097/3,584,947 shares)                       $16.64
         Maximum sales charge
         (3.75% of offering price)                              0.65
         Offering price per share                             $17.29

CSIF Equity Portfolio
         Net asset value per share
         ($147,002,362/5,294,260 shares)                      $27.77
         Maximum sales charge, Class A
         (4.75% of offering price)                              1.38
         Offering price per share, Class A                    $29.15

         Class C net asset value and offering price per share
         ($6,248,542/236,978 shares)                          $26.37
    

                     CALCULATION OF YIELD AND TOTAL RETURN

Money Market Portfolio: Yield
         From time to time the Money  Market  Portfolio  advertises  its "yield"
and "effective  yield." Both yield figures are based on historical  earnings and
are not  intended  to  indicate  future  performance.  The  "yield" of the Money
Market  Portfolio  refers to the actual income generated by an investment in the
Portfolio  over a  particular  base  period of time.  If the base period is less
than  one  year,  the  yield is then  "annualized."  That  is,  the net  change,
exclusive  of capital  changes,  in the value of a share  during the base period
is  divided by the net asset  value per share at the  beginning  of the  period,
and the  result is  multiplied  by 365 and  divided by the number of days in the
base period.  Capital  changes  excluded from the  calculation of yield are: (1)
realized  gains  and  losses  from the sale of  securities,  and (2)  unrealized
appreciation and depreciation.  The Money Market  Portfolio's  "effective yield"
for a seven-day  period is its  annualized  compounded  yield during the period,
calculated according to the following formula:

               Effective yield = (base period return + 1)365/7 -1

   
         For the seven-day  period ended  September  30, 1997,  the Money Market
Portfolio's yield was 4.86% and its effective yield was 4.97%.
    

Bond Portfolio: Yield
         The Bond  Portfolio  may also  advertise  its yield  from time to time.
Yield  quotations  are  historical  and  are not  intended  to  indicate  future
performance.  Yield  quotations  for the Bond  Portfolio  refer to the aggregate
imputed  yield-to-maturity  of each of the Portfolio's  investments based on the
market  value as of the  last day of a given  thirty-day  or  one-month  period,
less  accrued  expenses  (net of  reimbursement),  divided by the average  daily
number of outstanding  shares  entitled to receive  dividends  times the maximum
offering  price on the last day of the  period  (so that the effect of the sales
charge is included in the  calculation),  compounded on a "bond  equivalent," or
semiannual,  basis.  The Bond  Portfolio's  yield is computed  according  to the
following formula:

                           Yield = 2 (a-b/cd +1)6 - 1

   
where a = dividends  and interest  earned  during the period using the aggregate
imputed  yield-to  maturity  for each of the  Portfolio's  investments  as noted
above;  b = expenses  accrued  for the period  (net of  reimbursement);  c = the
average  daily  number  of  shares  outstanding  during  the  period  that  were
entitled to receive  dividends;  and d = the maximum offering price per share on
the last day of the period.  Using this calculation,  the Bond Portfolio's yield
for the month ended September 30, 1997 was 4.77% for Class A shares.
         The yield of both the Money Market and Bond  Portfolios  will fluctuate
in  response  to changes in  interest  rates and  general  economic  conditions,
portfolio quality,  portfolio  maturity,  and operating  expenses.  Yield is not
fixed or insured and  therefore is not  comparable to a savings or other similar
type  of  account.  Yield  during  any  particular  time  period  should  not be
considered an indication of future yield. It is,  however,  useful in evaluating
a Portfolio's performance in meeting its investment objective.
    

Managed Growth, Equity and Bond Portfolios: Total Return and Other Quotations
         The  Managed  Growth,  Bond and Equity  Portfolios  may each  advertise
"total  return."  Total return is  calculated  separately  for each class of the
Managed  Growth and Equity  Portfolios.  Total  return is computed by taking the
total  number of shares  purchased by a  hypothetical  $1,000  investment  after
deducting any applicable  sales charge,  adding all additional  shares purchased
within the period with reinvested  dividends and distributions,  calculating the
value of those  shares at the end of the period,  and dividing the result by the
initial  $1,000  investment.  Note:  "Total  Return" as quoted in the  Financial
Highlights  section of the Fund's  Prospectus and Annual Report to Shareholders,
however,  per SEC instructions,  does not reflect deduction of the sales charge,
and  corresponds  to  "return  without  maximum  load"  (or "w/o max  load")  as
referred to herein.  For  periods of more than one year,  the  cumulative  total
return  is then  adjusted  for the  number  of years,  taking  compounding  into
account, to calculate average annual total return during that period.
         Total return is computed according to the following formula:

                                P(1 + T)n = ERV

where P = a  hypothetical  initial  payment of  $1,000;  T = total  return;  n =
number  of  years;  and ERV = the  ending  redeemable  value  of a  hypothetical
$1,000 payment made at the beginning of the period.
         Total  return is  historical  in nature and is not intended to indicate
future  performance.  All total return  quotations  reflect the deduction of the
Portfolio's  maximum sales charge,  except quotations of "return without maximum
load"  (or "w/o max  load")  which  do not  deduct  sales  charge,  and  "actual
return,"  which  reflect  deduction of the sales  charge only for those  periods
when a sales charge was actually  imposed.  Return without  maximum load,  which
will be higher than total return,  should be considered only by investors,  such
as  participants  in certain  pension  plans,  to whom the sales charge does not
apply,  or for purposes of comparison  only with  comparable  figures which also
do not reflect sales charges, such as Lipper averages.
         Return for the Managed Growth,  Bond and Equity  Portfolios' shares for
the periods indicated are as follows:

   
Periods Ended              Class A          Class A           Class C
September 30, 1997         w/o Max Load     Average           Average
                                            Annual            Annual
                                            Return            Return
Managed Growth Portfolio
One Year                   21.94%           16.30%            20.56%
Five Years                 10.98%           9.91%             N/A
Ten Years                  9.31%            8.78%             N/A
Class C From Inception     N/A              N/A               11.22%
(March 1, 1994)

Periods Ended              Class A                   Class A
September 30, 1997         w/o Max Load              Average
Bond Portfolio                                       Annual Return

One Year                   9.89%                     5.74%
Five Years                 6.31%                     5.50%
Ten Years                  8.86%                     8.44%

Periods Ended              Class A          Class A           Class C
September 30, 1997         w/o Max Load     Average           Average
                                            Annual            Annual
                                            Return            Return
Equity Portfolio
One Year                   31.34%           25.07%            29.84%
Five Years                 12.17%           11.08%            N/A
Ten Years                  9.66%            9.13%             N/A
Class C From Inception     N/A              N/A               11.89%
(March 1, 1994)
    

         The Class A total return  figures  above and the Bond  Portfolio  yield
figures above were  calculated  using the maximum sales charge in effect at that
time.  Class C shares of the Bond  Portfolio were converted to Class A shares on
October  29,  1996.  CAM  assumed  active   management  of  the  Bond  Portfolio
effective  March,  1997,  new  sub-advisors  assumed  management  of the  Equity
Portfolio effective February,  1994, and new sub-advisors  assumed management of
the Managed Growth  Portfolio  effective July,  1995.  Total return,  like yield
and net asset  value per  share,  fluctuates  in  response  to changes in market
conditions.  Neither  total  return  nor yield for any  particular  time  period
should be considered an indication of future return.
         The Fund may  advertise  an internal  rate of return  ("IRR") on direct
company holdings in its special  equities  program.  This is a  non-standardized
performance  calculation.  See the explanation in the  "Advertising"  portion of
this  Statement,  below.  These direct  company  holdings  represent only a very
small portion of a Portfolio's  assets,  and the IRR on this part of the special
equities  program  should not be confused with the yield and total return of any
particular Portfolio.

                       PURCHASE AND REDEMPTION OF SHARES

         Share  certificates  will not be issued unless  requested in writing by
the  investor.  No  charge  will be made  for  share  certificate  requests.  No
certificates  will be issued for fractional  shares of any Portfolio.  A service
fee of $10,  plus any costs  incurred  by the Fund,  will be  charged  investors
whose purchase checks are returned for insufficient funds.
         Shareholders  in the Money  Market  Portfolio  wishing  to have  drafts
should  complete the signature  card enclosed with the  Investment  Application.
Existing  shareholders  may arrange for draft writing by contacting the Fund for
a  signature  card.  Other  documentation  may be  required  from  corporations,
fiduciaries  and  institutional  investors.  This draft writing  service will be
subject to the customary  rules and  regulations  governing  checking  accounts,
and the Fund  reserves  the right to change or suspend the  service.  Generally,
there  is no  charge  to you for the  maintenance  of  this  service  or for the
clearance  of drafts,  but the Fund  reserves  the right to charge a service fee
for drafts  returned for  insufficient  or  uncollected  funds.  As a service to
shareholders,  the Fund may  automatically  transfer the dollar amount necessary
to cover  drafts  you have  written  on the Fund to your Fund  account  from any
other of your identically  registered  accounts in Calvert money market funds or
Calvert Insured Plus. The Fund may charge a fee for this service.
         When a payable  through  draft is presented  for payment,  a sufficient
number of full and  fractional  shares from the  shareholder's  account to cover
the  amount  of  the  draft  will  be  redeemed  at the  net  asset  value  next
determined.  If there are insufficient shares in the shareholder's  account, the
draft may be returned.  This draft  writing  procedure  for  redemption  enables
shareholders  to  receive  the  daily  dividends  declared  on the  shares to be
redeemed  until such time as the draft is  presented to the  custodian  bank for
payment.  Drafts  presented  to the bank for  payment  which  would  require the
redemption of shares  purchased by check or  electronic  funds  transfer  within
the previous 10 business days may not be honored.
         Telephone  redemption  requests are processed upon the date of receipt,
if received prior to 4:00 p.m. Redemption  proceeds are normally  transmitted or
mailed the next business day,  although payment by check of redemption  proceeds
of  Managed  Growth,  Equity  and  Bond  Portfolio  shares  may  take up to five
business   days.   Telephone   redemption   requests  which  would  require  the
redemption of shares  purchased by check or  electronic  funds  transfer  within
the previous 10 business  days may not be honored.  The Fund  reserves the right
to modify the telephone redemption privilege.
         Amounts  redeemed by  telephone  may be mailed by check to the investor
to the  address  of record  without  charge.  Amounts  of more than $50 and less
than $300,000 may be  transferred  electronically  at no charge to the investor.
Amounts  of $l,000 or more will be  transmitted  by wire  without  charge by the
Fund to the  investor's  account at a domestic  bank or savings  association.  A
charge of $5 is imposed on wire transfers of less than $1,000.
         Existing  shareholders  who at any time  desire to change  instructions
already  given must send a notice  either to the  broker  through  which  shares
were  purchased  or to the Fund with a voided  check  from the bank  account  to
receive the redemption  proceeds.  New wiring instructions may be accompanied by
a voided check in lieu of a signature  guarantee.  Further  documentation may be
required  from  corporations,  fiduciaries,  pension  plans,  and  institutional
investors.
         The Fund's  redemption  check  normally  will be mailed to the investor
on the  next  business  day  following  the  date of  receipt  by the  Fund of a
written  redemption  request.  If the  investor  so  instructs  in such  written
redemption  request,  the check will be mailed or the redemption  proceeds wired
or  transferred  electronically  to a  preauthorized  account at the  investor's
bank.  Redemption  proceeds  are  normally  paid in cash.  However,  at the sole
discretion  of the  Fund,  the Fund has the  right to  redeem  shares  in assets
other  than  cash  for  redemption  amounts  exceeding,  in any  90-day  period,
$250,000  or 1% of the net asset  value of the Fund,  whichever  is less,  or as
allowed by law.
         The  right  of  redemption  may be  suspended  or the  date of  payment
postponed  for any period  during  which the New York Stock  Exchange  is closed
(other than  customary  weekend and holiday  closings),  when trading on the New
York Stock  Exchange is  restricted,  or an emergency  exists,  as determined by
the  Securities and Exchange  Commission,  or if the Commission has ordered such
a  suspension  for the  protection  of  shareholders.  Redemption  proceeds  are
normally mailed,  wired or transferred  electronically the next business day but
in no event  later than seven days after a proper  redemption  request  has been
received,  unless  redemptions  have been  suspended  or  postponed as described
above.

                        REDUCED SALES CHARGES (CLASS A)

         The Fund imposes  reduced  sales  charges for Class A shares in certain
situations  in which the  Principal  Underwriter  and the dealers  selling  Fund
shares may  expect to realize  significant  economies  of scale with  respect to
such sales.  Generally,  sales costs do not increase in proportion to the dollar
amount of the shares  sold;  the  per-dollar  transaction  cost for a sale to an
investor  of  shares  worth,  say,  $5,000 is  generally  much  higher  than the
per-dollar  cost for a sale of shares worth  $1,000,000.  Thus,  the  applicable
sales  charge  declines as a percentage  of the dollar  amount of shares sold as
the dollar amount increases.
         When a  shareholder  agrees to make  purchases  of shares over a period
of time  totaling a certain  dollar amount  pursuant to a Letter of Intent,  the
Underwriter  and selling  dealers can expect to realize the  economies  of scale
applicable  to that stated goal  amount.  Thus the Fund imposes the sales charge
applicable to the goal amount.  Similarly,  the  Underwriter and selling dealers
also  experience  cost savings when dealing  with  existing  Fund  shareholders,
enabling the Fund to afford  existing  shareholders  the Right of  Accumulation.
The  Underwriter  and selling  dealers can also expect to realize  economies  of
scale when making sales to the members of certain  qualified  groups which agree
to facilitate  distribution  of Fund shares to their  members.  See "Exhibit A -
Reduced Sales Charges" in the Prospectus.

                                  ADVERTISING

   
         The Fund or its  affiliates  may provide  information  such as, but not
limited   to,  the   economy,   investment   climate,   investment   principles,
sociological   conditions  and  political   ambiance.   Discussion  may  include
hypothetical  scenarios  or  lists  of  relevant  factors  designed  to aid  the
investor in  determining  whether  the Fund is  compatible  with the  investor's
goals.  The Fund may list  portfolio  holdings or give  examples  or  securities
that may have been  considered for inclusion in the  Portfolio,  whether held or
not.
         The Fund or its  affiliates  may supply  comparative  performance  data
and rankings  from  independent  sources such as  Donoghue's  Money Fund Report,
Bank  Rate  Monitor,  Money,  Forbes,  Lipper  Analytical  Services,  Inc.,  CDA
Investment  Technologies,   Inc.,  Wiesenberger  Investment  Companies  Service,
Russell 2000/Small Stock Index, Mutual Fund Values Morningstar  Ratings,  Mutual
Fund Forecaster,  Barron's,  The Wall Street Journal, and Schabacker  Investment
Management,  Inc. Such averages  generally do not reflect any front- or back-end
sales charges that may be charged by Funds in that  grouping.  The Fund may also
cite to any source,  whether in print or on-line,  such as  Bloomberg,  in order
to  acknowledge  origin  of  information.  The Fund may  compare  itself  or its
portfolio holdings to other  investments,  whether or not issued or regulated by
the  securities  industry,  including,  but  not  limited  to,  certificates  of
deposit and Treasury notes.  The Fund, its Advisor,  and its affiliates  reserve
the right to update performance rankings as new rankings become available.
         Calvert Group is the nation's  leading  family of socially  responsible
mutual  funds,  both in terms of socially  responsible  mutual fund assets under
management,  and number of socially  responsible  mutual fund portfolios offered
(source:  Social  Investment Forum,  November 30, 1997).  Calvert Group was also
the first to offer a family of socially responsible mutual fund portfolios.
         The Fund may  advertise  an internal  rate of return  ("IRR") on direct
company holdings in its special  equities  program.  This is a  non-standardized
performance  calculation.  The IRR includes direct investments in companies only
(no  funds,  partnerships,  or  financial  institutions).  It is based on annual
cash flows  beginning  with the first direct  investment on December 18, 1992 to
the date shown in the  advertisement.  Cash outflows  include all  disbursements
to  companies,  including  follow-ons.  The IRR assumes full exercise of warrant
positions in the year of calculation if not previously  exercised.  Cash inflows
includes  all  receipts  from   acquisitions  and  earnouts.   It  also  assumes
positions  are  fully  liquidated  in the year of  calculation.  Public  company
holdings  are  liquidated  at  market  price,  including  warrants;  others  are
liquidated  at carrying  value whether  marked up, down,  or at cost.  All but a
small portion of these returns are  unrealized.  These direct  company  holdings
represent  only a very small  portion of a  Portfolio's  assets,  and the IRR on
this part of the  special  equities  program  should  not be  confused  with the
yield and total return of any  particular  Portfolio.  The IRR on direct company
holdings  in  the  special   equities  program  of  the  Fund's  Managed  Growth
Portfolio  was 16% from  December 18, 1992  through  September  30,  1997.  Past
performance is no guarantee of future results.
    

                    TRUSTEES, OFFICERS, AND ADVISORY COUNCIL

   
         REBECCA  ADAMSON,  Trustee.  Since  1983,  Ms.  Adamson  has  served as
President of the national non-profit,  First Nations Financial Project.  Founded
by  her  in  1980,  First  Nations  is  the  only  American  Indian  alternative
development  institute in the country.  DOB: 9/10/47.  Address:  69 Kelley Road,
Falmouth, Virginia 22405.
         RICHARD L. BAIRD, JR.,  Trustee.  Mr. Baird is Executive Vice President
for the Family Health  Council,  Inc. in  Pittsburgh,  Pennsylvania.  The Family
Health  Council is a  non-profit  corporation  which  provides  family  planning
services,  nutrition,  maternal/child  health care, and various health screening
services.  Mr. Baird is a trustee/director  of each of the investment  companies
in the Calvert Group of Funds,  except for Calvert New World Fund, Inc.,  Acacia
Capital Corporation,  and Calvert World Values Fund, Inc. DOB: 5/9/48.  Address:
211 Overlook Drive, Pittsburgh, Pennsylvania 15216.
         *JOHN G.  GUFFEY,  JR.,  Executive  Vice  President  and  Trustee.  Mr.
Guffey is chairman  of the  Calvert  Social  Investment  Foundation,  organizing
director of the Community  Capital Bank in Brooklyn,  New York,  and a financial
consultant  to various  organizations.  In  addition,  he is a  Director  of the
Community  Bankers  Mutual  Fund of  Denver,  Colorado,  and the  Treasurer  and
Director of Silby,  Guffey,  and Co.,  Inc., a venture  capital firm. Mr. Guffey
is a trustee/director  of each of the other investment  companies in the Calvert
Group of Funds,  except for  Calvert  New World Fund,  Inc.  and Acacia  Capital
Corporation.  DOB: 5/15/48.  Address:  7205 Pomander Lane, Chevy Chase, Maryland
20815.
         JOY  V.  JONES,   Esq.,   Trustee.   Ms.   Jones  is  an  attorney  and
entertainment  manager in New York  City,  and was  formerly a partner  with the
firm  Rogers & Wells in New  York  City,  specializing  in real  estate  law and
municipal  finance.  Ms. Jones is also a Trustee of Sarah  Lawrence  College,  a
member of the Association of Black Women  Attorneys,  Inc., and a Trustee of the
Community  Service  Society of New York.  DOB:  7/2/50.  Address:  175 West 12th
Street, New York, New York 10011.
         *BARBARA J. KRUMSIEK,  President and Director.  Ms.  Krumsiek serves as
President,  Chief  Executive  Officer and Vice Chairman of Calvert  Group,  Ltd.
and as an officer and  director of each of its  affiliated  companies.  She is a
director of Calvert-Sloan  Advisers,  L.L.C., co-chair of the Board of Directors
of Calvert  World  Values  Fund,  Inc.,  and a  trustee/director  of each of the
investment companies in the Calvert Group of Funds. DOB: 08/09/52.
         TERRENCE  J.  MOLLNER,  Ed.D.,  Trustee.  Dr.  Mollner is  Founder  and
Chairperson  of  Trusteeship   Institute,   Inc.,  a  diverse  foundation  known
principally  for its  consultation  to  corporations  converting to  cooperative
employee-ownership.  He is also a director of Calvert  World Values  Fund,  Inc.
He served as a Trustee of the  Cooperative  Fund of New  England,  Inc.,  and is
now a member of its Board of  Advisors.  In addition,  Dr.  Mollner is a founder
and  member of the  Board of  Trustees  of the  Foundation  for  Soviet-American
Economic Cooperation.  DOB: 12/13/44.  Address: 15 Edwards Square,  Northampton,
Massachusetts 01060.
         SYDNEY AMARA MORRIS,  Trustee.  Rev.  Morris is Senior  Minister of the
Unitarian  Church of Vancouver,  Canada.  She  previously  served as Minister of
the  Unitarian-Universalist  Fellowship in Ames, Iowa. Rev. Morris is a graduate
of the Harvard  Divinity  School.  DOB:  9/7/49.  Address:  1225 W. 26th Avenue,
Vancouver, British Columbia, Canada V6H2A8.
         *CHARLES T. NASON,  Trustee.  Mr. Nason  serves as Chairman,  President
and Chief  Executive  Officer  of The Acacia  Group,  a  Washington,  D.C.-based
financial  services   organization,   including  Acacia  Mutual  Life  Insurance
Company and Calvert Group,  Ltd. DOB: 4/22/46.  Address:  7315 Wisconsin Avenue,
Bethesda, Maryland 20814.
         *D.  WAYNE  SILBY,  Esq.,   President  and  Trustee.  Mr.  Silby  is  a
trustee/director  of each of the  investment  companies in the Calvert  Group of
Funds,  except for Calvert New World Fund, Inc. and Acacia Capital  Corporation.
Mr. Silby is an officer,  director and  shareholder of Silby,  Guffey & Company,
Inc.,  which  serves as  general  partner  of Calvert  Social  Venture  Partners
("CSVP").  CSVP is a venture  capital  firm  investing  in socially  responsible
small companies.  DOB: 7/20/48.  Address:  1715 18th Street,  N.W.,  Washington,
D.C. 20009.
         RENO J.  MARTINI,  Senior Vice  President.  Mr.  Martini is Senior Vice
President  of  Calvert  Group,   Ltd.,  and  Senior  Vice  President  and  Chief
Investment  Officer of Calvert Asset  Management  Company,  Inc. Mr.  Martini is
also  a  director  and  President  of  Calvert-Sloan  Advisers,  L.L.C.,  and  a
director and officer of Calvert New World Fund. DOB: 1/13/50.
         RONALD M. WOLFSHEIMER,  CPA, Treasurer.  Mr. Wolfsheimer is Senior Vice
President and  Controller of Calvert  Group,  Ltd. and its  subsidiaries  and an
officer  of each of the  other  investment  companies  in the  Calvert  Group of
Funds.  Mr.  Wolfsheimer  is  Vice  President  and  Treasurer  of  Calvert-Sloan
Advisers, L.L.C., and a director of Calvert Distributors, Inc. DOB: 7/24/52.
         WILLIAM M.  TARTIKOFF,  Esq.,  Vice President and Assistant  Secretary.
Mr.  Tartikoff is an officer of each of the investment  companies in the Calvert
Group of Funds,  and is Senior Vice  President,  Secretary,  and General Counsel
of Calvert Group,  Ltd.,  and each of its  subsidiaries.  Mr.  Tartikoff is also
Vice President and Secretary of  Calvert-Sloan  Advisers,  L.L.C., a director of
Calvert  Distributors,   Inc.,  and  is  an  officer  of  Acacia  National  Life
Insurance Company. DOB: 8/12/47.
         CATHERINE S.  BARDSLEY,  Esq.,  Secretary.  Ms.  Bardsley is counsel to
Kirkpatrick & Lockhart,  LLP, the Fund's legal counsel.  DOB: 10/4/49.  Address:
1800 Massachusetts Avenue, N.W., Washington, D.C. 20036.
         DANIEL  K.  HAYES,  Vice  President.  Mr.  Hayes is Vice  President  of
Calvert Asset Management  Company,  Inc., and is an officer of each of the other
investment  companies  in the  Calvert  Group of Funds,  except for  Calvert New
World Fund, Inc. DOB: 9/9/50.
         SUSAN  WALKER  BENDER,  Esq.,   Assistant  Secretary.   Ms.  Bender  is
Associate  General  Counsel  of  Calvert  Group,  and an  officer of each of its
subsidiaries and Calvert-Sloan  Advisers,  L.L.C. She is also an officer of each
of the other investment companies in the Calvert Group of Funds. DOB: 1/29/59.
         KATHERINE STONER, Esq.,  Assistant  Secretary.  Ms. Stoner is Associate
General  Counsel  of Calvert  Group and an  officer of each of its  subsidiaries
and Calvert-Sloan  Advisers,  L.L.C. She is also an officer of each of the other
investment companies in the Calvert Group of Funds. DOB: 10/21/56.
         LISA  CROSSLEY  NEWTON,   Esq.,   Assistant  Secretary  and  Compliance
Officer.  Ms. Crossley Newton is Associate  General Counsel of Calvert Group and
an officer of each of its subsidiaries and  Calvert-Sloan  Advisers,  L.L.C. She
is also an  officer of each of the other  investment  companies  in the  Calvert
Group of Funds. DOB: 12/31/61.
         IVY WAFFORD  DUKE,  Esq.,  Assistant  Secretary.  Ms. Duke is Assistant
Counsel  of  Calvert  Group  and an  officer  of  each of its  subsidiaries  and
Calvert-Sloan  Advisers,  L.L.C.  She is also an  officer  of each of the  other
investment companies in the Calvert Group of Funds. DOB: 9/7/68.

         The address of directors  and  officers,  unless  otherwise  noted,  is
4550 Montgomery  Avenue,  Suite 1000N,  Bethesda,  Maryland 20814.  Trustees and
officers  of the Fund as a group  own  less  than 1% of the  Fund's  outstanding
shares.  Trustees  marked  with an *,  above,  are  "interested  persons" of the
Fund, under the Investment Company Act of 1940.
         Mr. Baird and Ms.  Adamson serve as the Fund's  representatives  to the
respective  Audit  Committees of the other  investment  companies in the Calvert
Group of  Funds;  and Rev.  Morris,  Dr.  Mollner,  and Ms.  Jones  serve as the
Fund's  representatives  to the respective  Investment  Policy Committees of the
other  investment  companies in the Calvert  Group of Funds.  Ms.  Adamson,  Dr.
Mollner,  and Mr.  Silby  serve on the Fund's  High  Social  Impact  Investments
Committee  which  assists  the Fund in  identifying,  evaluating  and  selecting
investments   in   securities   that   offer  a  rate  of   return   below   the
then-prevailing  market  rate  and that  present  attractive  opportunities  for
furthering  the Fund's social  criteria.  Ms. Jones,  Rev.  Morris,  and Messrs.
Guffey and Silby serve on the Fund's Special  Equities  Committee  which assists
the  Fund  in  identifying,   evaluating,   and  selecting  appropriate  private
placement  investment  opportunities  for the  Fund  that  are not  high  social
impact investments.
         The Advisory  Council has no power,  authority or  responsibility  with
respect  to the  management  of the Fund or the  conduct  of the  affairs of the
Fund. Messrs.  Silby,  Guffey,  Mollner and Baird, Ms. Adamson,  Ms. Jones, Rev.
Morris,  and Ms.  Krumsiek  and Mr.  Bynum  of the  Advisory  Council,  serve as
directors of Calvert Social  Investment  Foundation,  a non-profit  organization
formed to increase  awareness and educate the general  public about the benefits
of socially  conscious  investing.  The  Foundation  is not directly  affiliated
with Calvert Group.
         During  fiscal  1997,  trustees  of the  Fund not  affiliated  with the
Fund's  Advisor  were paid $64,533 by the Money  Market  Portfolio,  $241,519 by
the Managed  Growth  Portfolio,  $24,038 by the Bond  Portfolio,  and $44,007 by
the Equity  Portfolio.  Trustees  of the Fund not  affiliated  with the  Advisor
presently  receive  an annual  fee of  $20,500  for  service  as a member of the
Board of  Trustees  of the  Calvert  Group of Funds,  and a fee of $750 to $1500
for each regular Board or Committee  meeting  attended;  such fees are allocated
among the respective  Portfolios based upon their relative net assets.  Trustees
who serve only the CSIF Board  receive an annual fee of  $15,430,  plus $600 for
each Board and Committee meeting attended.
         Trustees of the Fund not  affiliated  with the Fund's Advisor may elect
to defer  receipt of all or a  percentage  of their fees and invest  them in any
fund in the Calvert Family of Funds through the Trustees  Deferred  Compensation
Plan  (shown  as  "Pension  or  Retirement  Benefits  Accrued  as  part  of Fund
Expenses,"  below).  Deferral of the fees is designed to maintain the parties in
the same  position  as if the fees  were  paid on a  current  basis.  Management
believes this will have a negligible  effect on the Fund's assets,  liabilities,
net  assets,  and net  income  per  share,  and  will  ensure  that  there is no
duplication of advisory fees.
    

Trustee Compensation Table

   
Fiscal Year 1997         Aggregate          Pension or        Total
(unaudited numbers)      Compensation       Retirement        Compensation
                         from Registrant    Benefits          from
                         for Service        Accrued as        Registrant and
                         as Trustee         part of           Fund Complex
                                            Registrant        paid to
                                            Expenses          Trustee**
Name of Trustee

Rebecca Adamson            $22,430          $6,198            $24,230
Richard L. Baird, Jr.      $918             $0                $34,450
John G. Guffey, Jr.        $11,781          $0                $61,615
Joy V. Jones               $30,932          $0                $29,730
Terrence J. Mollner        $31,910          $0                $44,131
Sydney Amara Morris        $22,532          $0                $22,630
D. Wayne Silby             $21,277          $0                $62,830

*Ms. Adamson has chosen to defer a portion of her compensation. Her total
deferred compensation, including dividends and capital appreciation, was
$42,009.47 as of September 30, 1997.
**As of December 31, 1997. The Fund Complex consists of nine (9) registered
investment companies.
    

                               INVESTMENT ADVISOR

   
         The Fund's  Investment  Advisor is Calvert  Asset  Management  Company,
Inc., 4550 Montgomery Avenue, 1000N,  Bethesda,  Maryland 20814, a subsidiary of
Calvert  Group Ltd.,  which is a  subsidiary  of Acacia  Mutual  Life  Insurance
Company of Washington, D.C. ("Acacia Mutual").
         The  Advisory  Contracts  between the Fund and the Advisor were entered
into on January 3, 1984 for the Money  Market and Bond  Portfolio,  May 24, 1994
for the Equity  Portfolio,  and July 1, 1995 for the Managed  Growth  Portfolio.
The  contracts  will  remain in effect  indefinitely,  provided  continuance  is
approved  at least  annually  by the vote of the  holders of a  majority  of the
outstanding  shares of the Fund or by the  Board of  Trustees  of the Fund;  and
further  provided that such  continuance  is also approved  annually by the vote
of a majority of the  trustees  of the Fund who are not parties to the  Contract
or interested  persons of parties to the Contract or interested  persons of such
parties,  cast in person at a meeting  called for the  purpose of voting on such
approval.  The Contract may be terminated  without  penalty by either party upon
60 days' prior written notice;  it automatically  terminates in the event of its
assignment.
         Under the  Contract,  the  Advisor  provides  investment  advice to the
Fund and oversees its  day-to-day  operations,  subject to direction and control
by the Fund's  Board of  Trustees.  For its  services,  the Advisor  receives an
annual fee, payable  monthly,  of 0.70% of the first $500 million of the Managed
Growth  Portfolio's  average  daily net assets,  0.675% of the next $500 million
of such  assets,  and 0.65% of all  assets  over $1  billion  (plus/minus  up to
0.15% performance  adjustment fee), 0.65% of the Bond Portfolio's  average daily
net assets (the  Advisor has agreed to limit the fee to 0.55%  through  February
29,  2000),   0.70%  of  the  Equity   Portfolio's   average  daily  net  assets
(plus/minus  up to 0.20%  performance  adjustment  fee),  and 0.50% of the Money
Market  Portfolio's  average daily net assets.  See  "Management of the Fund" in
the  Prospectus  for the  Managed  Growth  and  Equity  Portfolio  advisory  and
sub-advisory  fees,  which  include a  performance  adjustment  fee. The Advisor
reserves  the  right  (i) to  waive  all  or a  part  of its  fee  and  (ii)  to
reallocate  a part  of its  fee to  broker-dealers  in  consideration  of  their
promotional or administrative services.
         CAM has retained NCM Capital  Management  Group, Inc. and Brown Capital
Management,  Inc. as Subadvisors for the Managed Growth  Portfolio,  and Loomis,
Sayles & Company,  L.P. ("Loomis,  Sayles") to serve as Subadvisor to the Equity
Portfolio.  See  Prospectus,  "Management  of the Fund." The  computation of the
Investment  Performance  Fee and the  Investment  Record  Period will be made in
accordance  with Rule 205-1  under the  Investment  Advisors  Act of 1940 or any
other  applicable  rule as,  from time to time,  may be adopted or  amended.  In
addition to the  subadvisory  fee, the Advisor pays a marketing  fee of 0.05% to
Loomis, based on the Equity Portfolio's average daily net assets.
         The  Advisor   provides  the  Fund  with  investment   supervision  and
management,  administrative  services,  office  space,  furnishes  executive and
other  personnel  to the  Fund,  and may pay Fund  advertising  and  promotional
expenses.  The  Advisor  reserves  the  right to  compensate  broker-dealers  in
consideration of their  promotional or  administrative  services.  The Fund pays
all  other   administrative  and  operating  expenses,   including:   custodial,
registrar,  dividend  disbursing  and transfer  agency  fees;  federal and state
securities   registration  fees;  salaries,   fees  and  expenses  of  trustees,
executive  officers and  employees of the Fund,  and Advisory  Council  members,
who are not "affiliated  persons" of the Advisor or the  Subadvisors  within the
meaning  of the  Investment  Company  Act of  1940;  insurance  premiums;  trade
association  dues;  legal and audit  fees;  interest,  taxes and other  business
fees;  expenses of printing  and mailing  reports,  notices,  prospectuses,  and
proxy material to  shareholders;  annual  shareholders'  meeting  expenses;  and
brokerage  commissions and other costs  associated with the purchase and sale of
portfolio  securities.  The Advisor has agreed to  reimburse  the Money  Market,
Managed Growth,  and Bond  Portfolios for their  respective  operating  expenses
(excluding   brokerage,   taxes,   interest,   Distribution  Plan  expenses  and
extraordinary  items,  and,  with  respect  to  the  Managed  Growth  Portfolio,
performance fees earned)  exceeding,  on a pro rata basis, 1.5% of the first $30
million of the respective  Portfolio's  average daily net assets, and 1% of such
assets in excess of $30 million.
         The  advisory  fees paid to the Advisor by the Money  Market  Portfolio
for the fiscal years ended  September 30, 1995,  1996,  and 1997 were  $727,343,
$809,573, and $829,686,  respectively.  The advisory fees paid to the Advisor by
the Managed  Growth  Portfolio for the same years were  $3,645,338,  $4,054,218,
and  $3,739,407,  respectively.  The advisory fees paid to the Advisor for these
years  by  the  Bond   Portfolio   were   $400,253,   $421,016,   and  $363,612,
respectively;  and the Equity Portfolio paid $569,589,  $496,208,  and $683,046,
respectively.
    

                             METHOD OF DISTRIBUTION

   
         The Fund has  entered  into an  agreement  with  Calvert  Distributors,
Inc.  ("CDI") whereby CDI, acting as principal  underwriter for the Fund,  makes
a  continuous  offering  of the Fund's  securities  on a "best  efforts"  basis.
Under the terms of the  agreement,  CDI is entitled to receive,  pursuant to the
Distribution  Plans,  a  distribution  fee from the  Fund  based on the  average
daily net assets of each  Portfolio's  Class A shares,  and  Managed  Growth and
Equity  Portfolios'  Class C shares.  The Money Market  Portfolio has never paid
Distribution  Plan  expenses.  For the fiscal  years ended  September  30, 1995,
1996,  and 1997, the Managed  Growth  Portfolio  paid Class A distribution  plan
expenses of $1,219,694,  $1,361,666 and $1,474,198,  respectively.  Of the Class
A  distribution  expenses  paid in fiscal 1997,  $871,094 was used to compensate
dealers for their share  distribution  promotional  services,  $179,250  was for
the  printing  and mailing of  prospectuses  and sales  materials  to  investors
(other  than  current  shareholders),   and  the  remainder  partially  financed
advertising.  For fiscal year 1995, the Bond and Equity  Portfolios paid Class A
distribution  plan  expenses of $121,992  and  $203,878,  respectively,  and for
fiscal year 1996,  $127,042 and  $217,340,  respectively.  For fiscal year 1997,
the Bond and Equity  Portfolios  paid Class A distribution  expenses of $122,531
and  $277,434,  respectively.  Of the  distribution  expenses  paid  by  Class A
Shares  of the Bond  Portfolio  in  fiscal  1997,  the full  amount  was used to
compensate dealers for their share  distribution  promotional  services.  Of the
distribution  expenses paid by Class A Shares of the Equity  Portfolio in fiscal
1997,  $255,767  was used to  compensate  dealers for their  share  distribution
promotional  services,  while the remainder  partially financed the printing and
mailing of  prospectuses  and sales  materials to investors  (other than current
shareholders).  For Class A Managed  Growth,  Equity and Bond Portfolio  shares,
CDI also  receives  the  portion  of the sales  charge  in excess of the  dealer
reallowance.  During the fiscal year 1995,  CDI  received  net sales  charges of
$203,099,  $27,038,  and  $63,459,  for the  Managed  Growth,  Bond,  and Equity
Portfolios,  respectively.  During  fiscal  year 1996,  CDI  received  net sales
charges of $405,789,  $56,699,  and $129,525,  for the Managed Growth, Bond, and
Equity  Portfolios,  respectively.  For fiscal year 1997, CDI received net sales
charges of $331,679,  $53,362,  and $211,952,  for the Managed Growth, Bond, and
Equity Portfolios, respectively.
         For fiscal 1995,  Class C  Distribution  Plan expenses were $28,447 and
$11,918 for the Managed Growth and Equity Portfolios,  respectively. Fiscal year
1996 Class C  Distribution  Plan  expenses  were  $52,406  and  $22,628  for the
Managed  Growth  and  Equity  Portfolios,   respectively,  while  1997  Class  C
Distribution Plan expenses were $77,871 and $44,775, respectively.
         Pursuant to Rule 12b-1 under the  Investment  Company Act of 1940,  the
Fund has adopted  Distribution  Plans (the "Plans") which permit the Fund to pay
certain  expenses  associated with the distribution and servicing of its shares.
Such expenses for Class A shares may not exceed,  on an annual  basis,  0.35% of
the Managed Growth,  Equity and Bond  Portfolios'  respective  average daily net
assets  and 0.25% of the Money  Market  Portfolio's  average  daily net  assets.
However,  the Fund's  Board of  Trustees  has  determined  that,  until  further
action by the Board,  no Portfolio  shall pay Class A  distribution  expenses in
excess of 0.25% of its  average  daily net  assets;  and  further,  that Class A
distribution  expenses  only be charged on the  average  daily net assets of the
Managed Growth Portfolio in excess of $30,000,000.
         Expenses  under the Fund's  Class C Plans may not exceed,  on an annual
basis,  1.00% of the  Managed  Growth  and  Equity  Portfolios'  Class C average
daily net assets.
         The Fund's  Distribution  Plans were approved by the Board of Trustees,
including  the  Trustees who are not  "interested  persons" of the Fund (as that
term is defined in the  Investment  Company  Act of 1940) and who have no direct
or  indirect  financial  interest  in  the  operation  of  the  Plans  or in any
agreements  related to the Plans.  The selection and  nomination of the Trustees
who are not  interested  persons of the Fund is committed to the  discretion  of
such   disinterested   Trustees.   In  establishing   the  Plans,  the  Trustees
considered  various factors  including the amount of the distribution  expenses.
The Trustees  determined  that there is a reasonable  likelihood  that the Plans
will benefit the Fund and its shareholders.
         The  Plans  may  be   terminated   by  vote  of  a   majority   of  the
non-interested  Trustees  who have no direct or indirect  financial  interest in
the Plans,  or by vote of a majority of the  outstanding  shares of the affected
class or  Portfolio of the Fund.  Any change in the Plans that would  materially
increase  the  distribution  cost  to  a  Portfolio  requires  approval  of  the
shareholders of the affected class;  otherwise,  the Plans may be amended by the
Trustees,  including a majority  of the  non-interested  Trustees  as  described
above.  The  Plans  will  continue  in  effect  for  successive  one-year  terms
provided that such  continuance  is  specifically  approved by (i) the vote of a
majority  of the  Trustees  who are  not  parties  to the  Plans  or  interested
persons  of any  such  party  and  who  have no  direct  or  indirect  financial
interest in the Plans,  and (ii) the vote of a majority  of the entire  Board of
Trustees.
         Apart from the Plans,  the Advisor and CDI, at their own  expense,  may
incur costs and pay expenses  associated with the  distribution of shares of the
Fund.
         Certain  broker-dealers,  and/or other persons may receive compensation
from the investment advisor,  underwriter,  or their affiliates for the sale and
distribution  of the securities or for services to the Fund.  Such  compensation
may  include  additional  compensation  based on assets held  through  that firm
beyond the  regularly  scheduled  rates,  and  finder's  fees  payments to firms
whose  representatives  are  responsible  for soliciting a new account where the
accountholder does not choose to purchase through that firm.
    

                   TRANSFER AND SHAREHOLDER SERVICING AGENTS

   
         National  Financial  Data  Services,  Inc.  ("NFDS"),  a subsidiary  of
State  Street  Bank & Trust,  has been  retained  by the Fund to act as transfer
agent  and  dividend   disbursing   agent.   These   responsibilities   include:
responding  to certain  shareholder  inquiries and  instructions,  crediting and
debiting  shareholder  accounts for purchases and redemptions of Fund shares and
confirming  such  transactions,  and daily updating of  shareholder  accounts to
reflect declaration and payment of dividends.
         Calvert  Shareholder  Services,  Inc., a subsidiary  of Calvert  Group,
Ltd.,  and Acacia  Mutual,  has been retained by the Fund to act as  shareholder
servicing agent.  Shareholder servicing  responsibilities  include responding to
shareholder inquiries and instructions  concerning their accounts,  entering any
telephoned  purchases  or  redemptions  into the  NFDS  system,  maintenance  of
broker-dealer  data, and preparing and  distributing  statements to shareholders
regarding  their  accounts.  Calvert  Shareholder  Services,  Inc.  was the sole
transfer agent prior to January 1, 1998.
         For  these  services,  NFDS  and  Calvert  Shareholder  Services,  Inc.
receive  a total fee of $14.00  per  shareholder  account  for  Managed  Growth,
Bond,  and Equity and $22.00 for Money  Market  shareholder  account,  and $1.60
per shareholder transaction.
    

                             PORTFOLIO TRANSACTIONS

   
         Portfolio   transactions   are   undertaken   on  the  basis  of  their
desirability  from  an  investment  standpoint.  Investment  decisions  and  the
choice of brokers  and dealers  are made by the Fund's  Advisor  and  Subadvisor
under the direction and supervision of the Fund's Board of Trustees.
         Broker-dealers  who  execute  portfolio  transactions  on behalf of the
Fund are selected on the basis of their  professional  capability  and the value
and quality of their services.  The Advisor and Subadvisor  reserve the right to
place   orders  for  the  purchase  or  sale  of   portfolio   securities   with
broker-dealers  who have sold  shares of the Fund or who  provide  the Fund with
statistical,   research,  or  other  information  and  services.   Although  any
statistical   research   or  other   information   and   services   provided  by
broker-dealers  may be useful to the  Advisor  and the  Subadvisor,  the  dollar
value of such  information  and  services is generally  indeterminable,  and its
availability  or receipt does not serve to  materially  reduce the  Advisor's or
Subadvisor's  normal  research  activities  or  expenses.  In fiscal years 1995,
1996,  and 1997, no  commissions  were paid to any officer,  trustee or Advisory
Council  member of the Fund or any of their  affiliates.  For the Managed Growth
Portfolio,   1996   and   1997   aggregate   brokerage   commissions   paid   to
broker-dealers  were  $693,085  and  $547,048,   respectively.   1996  and  1997
aggregate  brokerage  commissions  paid  to  broker-dealers  were  $352,527  and
$329,488, respectively, for the Equity Portfolio.
         The Advisor and  Subadvisor  may also  execute  portfolio  transactions
with or through  broker-dealers who have sold shares of the Fund. However,  such
sales will not be a  qualifying  or  disqualifying  factor in a  broker-dealer's
selection  nor will the  selection of any  broker-dealer  be based on the volume
of Fund shares sold. The Advisor or Subadvisor may  compensate,  at its expense,
such  broker-dealers  in consideration of their  promotional and  administrative
services.
         Depending  upon  market  conditions,   portfolio  turnover,   generally
defined as the  lesser of annual  sales or  purchases  of  portfolio  securities
divided  by the  average  monthly  value  of  the  Fund's  portfolio  securities
(excluding  from both the numerator and the  denominator  all  securities  whose
maturities or  expiration  dates as of the date of  acquisition  are one year or
less),  expressed as a percentage,  is under normal circumstances expected to be
within 50% to 150%.  For the 1996 fiscal year,  the portfolio  turnover rates of
the Managed  Growth,  Bond,  and Equity  Portfolios  were 111%,  22%,  and 118%,
respectively.  The 1997  fiscal  year  portfolio  turnover  rates of the Managed
Growth, Bond, and Equity Portfolios were 215%, 319%, and 93%, respectively.
    

                     INDEPENDENT ACCOUNTANTS AND CUSTODIANS

   
         Coopers & Lybrand,  L.L.P.,  has been selected by the Board of Trustees
to serve as independent  accountants  for fiscal year 1998.  State Street Bank &
Trust  Company,   N.A.,  225  Franklin  Street,  Boston,  MA  02110,  serves  as
custodian of the Fund's investments.  First National Bank of Maryland,  25 South
Charles  Street,  Baltimore,  Maryland 21203 also serves as custodian of certain
of the Fund's cash assets.  The  custodians  have no part in deciding the Fund's
investment  policies or the choice of  securities  that are to be  purchased  or
sold for the Fund's Portfolios.
    

                              GENERAL INFORMATION

         The Fund was  approved as a  Massachusetts  business  trust on December
14, 1981.  The Fund's  Declaration  of Trust  contains an express  disclaimer of
shareholder  liability for acts or obligations of the Fund. The  shareholders of
a Massachusetts business trust might, however,  under certain circumstances,  be
held  personally  liable as partners for its  obligations.  The  Declaration  of
Trust provides for  indemnification  and  reimbursement  of expenses out of Fund
assets for any shareholder  held personally  liable for obligations of the Fund.
The  Declaration  of Trust also  provides  that the Fund  shall,  upon  request,
assume the  defense of any claim made  against  any  shareholder  for any act or
obligation  of the Fund and satisfy any judgment  thereon.  The  Declaration  of
Trust further  provides that the Fund may maintain  appropriate  insurance  (for
example,   fidelity  bonding  and  errors  and  omissions   insurance)  for  the
protection of the Fund,  its  shareholders,  trustees,  officers,  employees and
agents  to  cover  possible  tort and  other  liabilities.  Thus,  the risk of a
shareholder  incurring  financial  loss on account of  shareholder  liability is
limited to  circumstances  in which  both  inadequate  insurance  exists and the
Fund itself is unable to meet its obligations.
         Each share of each series  represents an equal  proportionate  interest
in that  series with each other  share and is  entitled  to such  dividends  and
distributions  out of the income  belonging  to such  series as  declared by the
Board.  The  Managed  Growth  and  Equity  Portfolios  each  offer two  separate
classes of shares:  Class A and Class C. Each class represents  interests in the
same  portfolio of  investments  but, as further  described  in the  prospectus,
each  class  is  subject  to  differing   sales  charges  and  expenses,   which
differences  will result in differing net asset values and  distributions.  Upon
any  liquidation of the Fund,  shareholders  of each class are entitled to share
pro rata in the net assets belonging to that series available for distribution.
         The Fund will  send its  shareholders  confirmations  of  purchase  and
redemption  transactions,   as  well  as  periodic  transaction  statements  and
unaudited  semi-annual  and audited  annual  financial  statements of the Fund's
investment  securities,  assets  and  liabilities,   income  and  expenses,  and
changes in net assets.
         The  Prospectus  and this  Statement of Additional  Information  do not
contain  all  the  information  in  the  Fund's  registration   statement.   The
registration  statement is on file with the Securities  and Exchange  Commission
and is available to the public.

                              FINANCIAL STATEMENTS

   
         The Fund's audited financial  statements  included in its Annual Report
to  Shareholders  dated  September  30,  1997,  are  expressly  incorporated  by
reference and made a part of this  Statement of Additional  Information.  A copy
of the Annual  Report may be  obtained  free of charge by writing or calling the
Fund.
    

              CONTROL PERSONS AND PRINCIPAL HOLDERS OF SECURITIES

   
         As of January 2, 1998,  the  following  shareholder  owned of record 5%
or more of CSIF Money Market Fund:

         Name and Address                        % of Ownership
         United Mine Workers of America          6.41%
         Cash Deferred Savings Trust of 1988
         c/o Dave Keyman
         4455 Connecticut Avenue NW
         Washington, DC 20008-2328
    

                                    APPENDIX

CORPORATE BOND AND COMMERCIAL PAPER RATINGS
Corporate Bonds:
Description of Moody's Investors Service Inc.'s/Standard & Poor's bond ratings:
         Aaa/AAA:  Best  quality.  These  bonds  carry  the  smallest  degree of
investment  risk  and  are  generally  referred  to  as  "gilt  edge."  Interest
payments  are  protected  by a large or by an  exceptionally  stable  margin and
principal is secure.  This rating  indicates an extremely strong capacity to pay
principal and interest.
         Aa/AA:  Bonds rated AA also qualify as high-quality  debt  obligations.
Capacity to pay  principal  and interest is very strong,  and in the majority of
instances  they  differ  from AAA issues  only in small  degree.  They are rated
lower than the best bonds because  margins of protection  may not be as large as
in  Aaa  securities,  fluctuation  of  protective  elements  may  be of  greater
amplitude,  or there may be other elements  present which make  long-term  risks
appear somewhat larger than in Aaa securities.
         A/A:  Upper-medium  grade  obligations.   Factors  giving  security  to
principal  and interest  are  considered  adequate,  but elements may be present
which  make the  bond  somewhat  more  susceptible  to the  adverse  effects  of
circumstances and economic conditions.
         Baa/BBB:  Medium grade obligations;  adequate capacity to pay principal
and interest.  Whereas they normally  exhibit  adequate  protection  parameters,
adverse economic  conditions or changing  circumstances  are more likely to lead
to a  weakened  capacity  to pay  principal  and  interest  for  bonds  in  this
category than for bonds in higher rated categories.
         Ba/BB,  B/B,  Caa/CCC,   Ca/CC:  Debt  rated  in  these  categories  is
regarded as  predominantly  speculative with respect to capacity to pay interest
and  repay  principal.  The  higher  the  degree of  speculation,  the lower the
rating.   While  such  debt  will  likely  have  some  quality  and   protective
characteristics,  these are  outweighed  by large  uncertainties  or major  risk
exposure to adverse conditions.
         C/C:  This  rating is only for  income  bonds on which no  interest  is
being paid.
         D:  Debt  in  default;  payment  of  interest  and/or  principal  is in
arrears.

Commercial Paper Ratings:
         MOODY'S INVESTORS SERVICE, INC.:
         The Prime rating is the highest  commercial  paper  rating  assigned by
Moody's.  Among the factors  considered by Moody's in assigning  ratings are the
following:  (1)  evaluation  of the  management  of  the  issuer;  (2)  economic
evaluation  of  the  issuer's   industry  or  industries  and  an  appraisal  of
speculative-type  risks which may be inherent in certain  areas;  (3) evaluation
of the issuer's  products in relation to  competition  and customer  acceptance;
(4) liquidity;  (5) amount and quality of long-term  debt; (6) trend of earnings
over a period of ten years;  (7) financial  strength of a parent company and the
relationships  which exist with the issuer;  and (8)  recognition  by management
of  obligations  which  may be  present  or may  arise  as a  result  of  public
interest  questions and  preparations to meet such  obligations.  Issuers within
this Prime  category may be given ratings 1, 2, or 3,  depending on the relative
strengths of these factors.
         STANDARD & POOR'S CORPORATION:
         Commercial  paper  rated A by  Standard  &  Poor's  has  the  following
characteristics:  (i) liquidity  ratios are adequate to meet cash  requirements;
(ii)  long-term  senior  debt  rating  should be A or better,  although  in some
cases BBB credits may be allowed if other  factors  outweigh the BBB;  (iii) the
issuer  should have  access to at least two  additional  channels of  borrowing;
(iv) basic  earnings and cash flow should have an upward  trend with  allowances
made for unusual  circumstances;  and (v) typically the issuer's industry should
be well  established  and the issuer  should have a strong  position  within its
industry and the reliability and quality of management  should be  unquestioned.
Issuers  rated A are further  referred to by use of numbers 1, 2 and 3 to denote
the relative strength within this highest classification.


<PAGE>

                                LETTER OF INTENT

                                                                                
Date

Calvert Distributors, Inc.
4550 Montgomery Avenue
Bethesda, MD 20814

Ladies and Gentlemen:

         By signing this Letter of Intent, or affirmatively marking the Letter
of Intent option on my Fund Account Application Form, I agree to be bound by
the terms and conditions applicable to Letters of Intent appearing in the
Prospectus and the Statement of Additional Information for the Fund and the
provisions described below as they may be amended from time to time by the
Fund. Such amendments will apply automatically to existing Letters of Intent.

         I intend to invest in the shares of:_____________________
(Fund or Portfolio name) during the thirteen (13) month period from the date
of my first purchase pursuant to this Letter (which cannot be more than ninety
(90) days prior to the date of this Letter or my Fund Account Application
Form, whichever is applicable), an aggregate amount (excluding any
reinvestments of distributions) of at least fifty thousand dollars ($50,000)
which, together with my current holdings of the Fund (at public offering price
on date of this Letter or my Fund Account Application Form, whichever is
applicable), will equal or exceed the amount checked below:

         __ $50,000 __ $100,000 __ $250,000 __ $500,000 __ $1,000,000

         Subject to the conditions specified below, including the terms of
escrow, to which I hereby agree, each purchase occurring after the date of
this Letter will be made at the public offering price applicable to a single
transaction of the dollar amount specified above, as described in the Fund's
prospectus. "Fund" in this Letter of Intent shall refer to the Fund or
Portfolio, as the case may be. No portion of the sales charge imposed on
purchases made prior to the date of this Letter will be refunded.

         I am making no commitment to purchase shares, but if my purchases
within thirteen months from the date of my first purchase do not aggregate the
minimum amount specified above, I will pay the increased amount of sales
charges prescribed in the terms of escrow described below. I understand that
4.75% of the minimum dollar amount specified above will be held in escrow in
the form of shares (computed to the nearest full share). These shares will be
held subject to the terms of escrow described below.

         From the initial purchase (or subsequent purchases if necessary),
4.75% of the dollar amount specified in this Letter shall be held in escrow in
shares of the Fund by the Fund's transfer agent. For example, if the minimum
amount specified under the Letter is $50,000, the escrow shall be shares
valued in the amount of $2,375 (computed at the public offering price adjusted
for a $50,000 purchase). All dividends and any capital gains distribution on
the escrowed shares will be credited to my account.

         If the total minimum investment specified under the Letter is
completed within a thirteen month period, escrowed shares will be promptly
released to me. However, shares disposed of prior to completion of the
purchase requirement under the Letter will be deducted from the amount
required to complete the investment commitment.

         Upon expiration of this Letter, the total purchases pursuant to the
Letter are less than the amount specified in the Letter as the intended
aggregate purchases, Calvert Distributors, Inc. ("CDI") will bill me for an
amount equal to the difference between the lower load I paid and the dollar
amount of sales charges which I would have paid if the total amount purchased
had been made at a single time. If not paid by the investor within 20 days,
CDI will debit the difference from my account. Full shares, if any, remaining
in escrow after the aforementioned adjustment will be released and, upon
request, remitted to me.

         I irrevocably constitute and appoint CDI as my attorney-in-fact, with
full power of substitution, to surrender for redemption any or all escrowed
shares on the books of the Fund. This power of attorney is coupled with an
interest.

         The commission allowed by CDI to the broker-dealer named herein shall
be at the rate applicable to the minimum amount of my specified intended
purchases.

         The Letter may be revised upward by me at any time during the
thirteen-month period, and such a revision will be treated as a new Letter,
except that the thirteen-month period during which the purchase must be made
will remain unchanged and there will be no retroactive reduction of the sales
charges paid on prior purchases.

         In determining the total amount of purchases made hereunder, shares
disposed of prior to termination of this Letter will be deducted. My
broker-dealer shall refer to this Letter of Intent in placing any future
purchase orders for me while this Letter is in effect.


                                                                       
Dealer                                  Name of Investor(s)


By                                                                     
     Authorized Signer                  Address


                                                                       
Date                                    Signature of Investor(s)


                                                                       
Date                                    Signature of Investor(s)


<PAGE>

PART C. OTHER INFORMATION


Item 24. Financial Statements and Exhibits

         (a) Financial statements

         Financial statements incorporated by reference to:

   
         All financial statements for Calvert Social Investment
         Fund are incorporated by reference to Registrant's
         Annual Report to Shareholders dated September 30, 1997,
         and filed December 15, 1997.
    

         Schedules II-VII, inclusive, for which provision is made
         in the applicable accounting regulation of the
         Securities and Exchange Commission, are omitted because
         they are not required under the related instructions,
         or they are inapplicable, or the required information
         is presented in the financial statements or notes
         thereto.

         (b) Exhibits:

         1. Declaration of Trust (incorporated by reference to
         Registrant's Initial Registration Statement,
         November 30, 1981).

         2. By-Laws (incorporated by reference to Registrant's
         Pre-Effective Amendment No. 2, September 3,
         1982).

         4. Specimen Stock Certificate (incorporated by reference
         to Registrant's Pre-Effective Amendment No.
         12, December 21, 1987).

         5. Advisory Contracts incorporated by reference to
         Registrant's Post-Effective Amendment No. 11,
         August 25, 1987, and Post-Effective Amendment No. 22,
         January 31, 1996.

         6. Underwriting and Dealer Agreements, (incorporated by
         reference to Registrant's Post-Effective Amendment
         No. 20, December 2, 1994).

         7. Trustees' Deferred Compensation Agreement,
         (incorporated by reference to Registrant's
         Post-Effective Amendment No. 17, December 20,
         1991).

   
         8. Custodial Contract , filed herewith.
    

         9. Transfer Agency Contract (incorporated by reference to
         Registrant's Post-Effective Amendment No. 11,
         August 25, 1987).

         9A. Form of Administrative Services Agreement with respect
         to Registrant's Managed Index Portfolio (incorporated by
         reference to Registrant's Post-Effective Amendment No. 24,
         December 17, 1997).

         10. Opinion and Consent of Counsel as to Legality
         of Shares Being Registered.

         11. Consent of Independent Accountants to
         Use of Report.

         14. Retirement Plans (incorporated by reference to
         Registrant's Post-Effective Amendment No. 5,
         December 23, 1985, and Registrant's Post-Effective
         Amendment No. 17, December 20, 1991).

         15. Rule 12b-1 Distribution Plan, (incorporated by
         reference to Registrant's Post-Effective Amendment
         No. 15, October 29, 1990 for Class A Shares and
         Registrant's Post-Effective Amendment No. 20,
         December 2, 1994 for Class B and C Shares).

         16. Schedule for Computation of Performance
         Quotation (incorporated by reference to Registrant's
         Post-Effective Amendment No. 13, December 20, 1988).

         17. Multiple-class plan pursuant to Investment
         Company Act of 1940 Rule 18f-3.

         Exhibits 3, 12 and 13 are omitted because they are inapplicable.


Item 25. Persons Controlled By or Under Common Control With Registrant

Registrant is controlled by its Board of Trustees, which is a
common Board with five other registered investment companies, First
Variable Rate Fund, Calvert Tax-Free Reserves, Calvert Cash Reserves,
The Calvert Fund, and Calvert Municipal Fund, Inc. In addition, several
members of Registrant's Board of Trustees also serve on the Boards of
Acacia Capital Corporation and Calvert World Values Fund, Inc. Each
of the Registrant's Trustees, other than Mr. Nason, serves as a director
of Calvert Social Investment Foundation, Inc. (the "Foundation"), an
independent, non-profit educational foundation, organized as a Maryland
corporation. The Registrant's Trustees as a group may, under certain
circumstances, control both the Registrant and the Foundation.


Item 26. Number of Holders of Securities

   
As of December 31, 1997, there were 12,202 holders of record of
Registrant's Class A shares of beneficial interest for Calvert Social
Investment Fund Money Market Portfolio.

As of December 31, 1997, there were 36,047 holders of record of
Registrant's Class A shares of beneficial interest for Calvert Social
Investment Fund Managed Growth Portfolio.

As of December 31, 1997, there were 1,098 holders of record of
Registrant's Class C shares of beneficial interest for Calvert Social
Investment Fund Managed Growth Portfolio.

As of December 31, 1997, there were 4,934 holders of record of
Registrant's Class A shares of beneficial interest for Calvert Social
Investment Fund Bond Portfolio.

As of December 31, 1997, there were 13,661 holders of record of
Registrant's Class A shares of beneficial interest for Calvert Social
Investment Fund Equity Portfolio.

As of December 31, 1997, there were 795 holders of record of
Registrant's Class C shares of beneficial interest for Calvert Social
Investment Fund Equity Portfolio.
    


Item 27. Indemnification

Registrant's Declaration of Trust, which Declaration is Exhibit
1 of this Registration Statement, provides, in summary, that officers,
trustees, employees, and agents shall be indemnified by Registrant
against liabilities and expenses incurred by such persons in connection
with actions, suits, or proceedings arising out of their offices or
duties of employment, except that no indemnification can be made to such
a person if he has been adjudged liable of willful misfeasance, bad
faith, gross negligence, or reckless disregard of his duties. In the
absence of such an adjudication, the determination of eligibility for
indemnification shall be made by independent counsel in a written
opinion or by the vote of a majority of a quorum of trustees who are
neither "interested persons" of Registrant, as that term is defined in
Section 2(a)(19) of the Investment Company Act of 1940, nor parties to
the proceeding.

Registrant's Declaration of Trust also provides that Registrant
may purchase and maintain liability insurance on behalf of any officer,
trustee, employee or agent against any liabilities arising from such
status. In this regard, Registrant maintains a Directors & Officers
(Partners) Liability Insurance Policy with Chubb Group of Insurance
Companies, 15 Mountain View Road, Warren, New Jersey 07061, providing
Registrant with $5 million in directors and officers liability coverage,
plus $3 million in excess directors and officers liability coverage for
the independent trustees/directors only. Registrant also maintains an
$8 million Investment Company Blanket Bond issued by ICI Mutual
Insurance Company, P.O. Box 730, Burlington, Vermont, 05402.


Item 28. Business and Other Connections of Investment Adviser

                           Name of Company, Principal
Name                       Business and Address                   Capacity


Barbara J. Krumsiek        Acacia Capital Corporation             Officer
                           Calvert Municipal Fund, Inc.            and
                           Calvert World Values Fund, Inc.        Director

                           Investment Companies
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           First Variable Rate Fund for           Officer
                            Government Income                      and
                           Calvert Tax-Free Reserves              Trustee
                           Calvert Social Investment Fund
                           Calvert Cash Reserves
                           The Calvert Fund

                           Investment Companies
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert Asset Management Co., Inc.     Officer
                           Investment Advisor                      and
                           4550 Montgomery Avenue                 Director
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert Group, Ltd.                    Officer
                           Holding Company                         and
                           4550 Montgomery Avenue                 Director
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert Shareholder Services, Inc.     Officer
                           Transfer Agent                          and
                           4550 Montgomery Avenue                 Director
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Administrative Services Co.    Officer
                           Service Company                        and
                           4550 Montgomery Avenue                 Director
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Distributors, Inc.             Officer
                           Broker-Dealer                           and
                           4550 Montgomery Avenue                 Director
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert-Sloan Advisers, LLC            Director
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert New World Fund, Inc.           Director
                           Investment Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           --------------
                           Alliance Capital Mgmt. L.P.      Sr. Vice President
                           Mutual Fund Division                   Director
                           1345 Avenue of the Americas
                           New York, NY 10105
                           --------------


Ronald M. Wolfsheimer      First Variable Rate Fund               Officer
                            for Government Income
                           Calvert Tax-Free Reserves
                           Calvert Cash Reserves
                           Calvert Social Investment Fund
                           The Calvert Fund
                           Acacia Capital Corporation
                           Calvert Municipal Fund, Inc.
                           Calvert World Values Fund, Inc.
                           Calvert New World Fund, Inc.

                           Investment Companies
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           --------------
                           Calvert Asset Management Co., Inc.     Officer
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Group, Ltd.                    Officer
                           Holding Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Shareholder Services, Inc.     Officer
                           Transfer Agent
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Administrative Services Co.    Officer
                           Service Company                         and
                           4550 Montgomery Avenue                 Director
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Distributors, Inc.             Director
                           Broker-Dealer                           and
                           4550 Montgomery Avenue                 Officer
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert-Sloan Advisers, LLC            Officer
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------


David R. Rochat            First Variable Rate Fund               Officer
                            for Government Income                  and
                           Calvert Tax-Free Reserves              Trustee
                           Calvert Cash Reserves
                           The Calvert Fund

                           Investment Companies
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Municipal Fund, Inc.           Officer
                           Investment Company                      and
                           4550 Montgomery Avenue                 Director
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Asset Management Co., Inc.     Officer
                           Investment Advisor                      and
                           4550 Montgomery Avenue                 Director
                           Bethesda, Maryland 20814
                           ---------------
                           Chelsea Securities, Inc.               Officer
                           Securities Firm                         and
                           Post Office Box 93                     Director
                           Chelsea, Vermont 05038
                           ---------------
                           Grady, Berwald & Co.                   Officer
                           Holding Company                         and
                           43A South Finley Avenue                Director
                           Basking Ridge, NJ 07920
                           ---------------


Reno J. Martini            Calvert Asset Management Co., Inc.     Officer
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Group, Ltd.                    Officer
                           Holding Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           First Variable Rate Fund               Officer
                            for Government Income
                           Calvert Tax-Free Reserves
                           Calvert Cash Reserves
                           Calvert Social Investment Fund
                           The Calvert Fund
                           Acacia Capital Corporation
                           Calvert Municipal Fund, Inc.
                           Calvert World Values Fund, Inc.

                           Investment Companies
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert New World Fund, Inc.           Director
                           Investment Company                      and
                           4550 Montgomery Avenue                 Officer
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert-Sloan Advisers, LLC            Director
                           Investment Advisor                      and
                           4550 Montgomery Avenue                 Officer
                           Bethesda, Maryland 20814
                           ---------------


Charles T. Nason           Acacia Mutual Life Insurance           Officer
                           Acacia National Life Insurance         and Director

                           Insurance Companies
                           7315 Wisconsin Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Acacia Financial Corporation           Officer
                           Holding Company                         and
                           7315 Wisconsin Avenue                  Director
                           Bethesda, Maryland 20814
                           ---------------
                           Gardner Montgomery Company             Director
                           Tax Return Preparation Services
                           7315 Wisconsin Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           Acacia Federal Savings Bank            Director
                           Savings Bank
                           7600-B Leesburg Pike
                           Falls Church, Virginia 22043
                           ---------------
                           Enterprise Resources, Inc.             Director
                           Business Support Services
                           7315 Wisconsin Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Acacia Insurance Management            Officer
                            Services Corporation                   and
                           Service Corporation                    Director
                           7315 Wisconsin Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Group, Ltd.                    Director
                           Holding Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Administrative Services Co.    Director
                           Service Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Asset Management Co., Inc.     Director
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Shareholder Services, Inc.     Director
                           Transfer Agent
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Social Investment Fund         Trustee
                           Investment Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           -----------------
                           The Advisors Group, Inc.               Director
                           Broker-Dealer and
                           Investment Advisor
                           7315 Wisconsin Avenue
                           Bethesda, Maryland 20814
                           ---------------


Robert-John H.             Acacia National Life Insurance         Officer
 Sands                     Insurance Company                       and
                           7315 Wisconsin Avenue                  Director
                           Bethesda, Maryland 20814
                           ----------------
                           Acacia Mutual Life Insurance           Officer
                           Insurance Company
                           7315 Wisconsin Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           Acacia Financial Corporation           Officer
                           Holding Company                         and
                           7315 Wisconsin Avenue                  Director
                           Bethesda, Maryland 20814
                           ----------------
                           Acacia Federal Savings Bank            Officer
                           Savings Bank
                           7600-B Leesburg Pike
                           Falls Church, Virginia 22043
                           ---------------
                           Enterprise Resources, Inc.             Director
                           Business Support Services
                           7315 Wisconsin Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Acacia Realty Corporation              Officer
                           Real Estate Investments
                           7315 Wisconsin Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Acacia Insurance Management            Officer
                            Services Corporation                   and
                           Service Corporation                    Director
                           7315 Wisconsin Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Gardner Montgomery Company             Officer
                           Tax Return                             and
                            Preparation Services                  Director
                           7315 Wisconsin Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           The Advisors Group, Inc.               Director
                           Broker-Dealer and
                           Investment Advisor
                           7315 Wisconsin Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Group, Ltd.                    Director
                           Holding Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Administrative Services Co.    Director
                           Service Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Asset Management, Co., Inc.    Director
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Shareholder Services, Inc.     Director
                           Transfer Agent
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------

William M. Tartikoff       Acacia National Life Insurance         Officer
                           Insurance Company
                           7315 Wisconsin Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           First Variable Rate Fund for           Officer
                            Government Income
                           Calvert Tax-Free Reserves
                           Calvert Cash Reserves
                           Calvert Social Investment Fund
                           The Calvert Fund
                           Acacia Capital Corporation
                           Calvert Municipal Fund, Inc.
                           Calvert World Values Fund, Inc.
                           Calvert New World Fund, Inc.

                           Investment Companies
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Group, Ltd.                    Officer
                           Holding Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Administrative                 Officer
                           Services Company
                           Service Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Asset Management Co. Inc.      Officer
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert Shareholder Services, Inc.     Officer
                           Transfer Agent
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert Distributors, Inc.             Director
                           Broker-Dealer                           and
                           4550 Montgomery Avenue                 Officer
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert-Sloan Advisers, LLC            Officer
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------


Susan Walker Bender        Calvert Group, Ltd.                    Officer
                           Holding Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Administrative Services Co.    Officer
                           Service Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Asset Management Co., Inc.     Officer
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert Shareholder Services, Inc.     Officer
                           Transfer Agent
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert Distributors, Inc.             Officer
                           Broker-Dealer
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert-Sloan Advisers, LLC            Officer
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           First Variable Rate Fund for           Officer
                            Government Income
                           Calvert Tax-Free Reserves
                           Calvert Cash Reserves
                           Calvert Social Investment Fund
                           The Calvert Fund
                           Acacia Capital Corporation
                           Calvert Municipal Fund, Inc.
                           Calvert World Values Fund, Inc.
                           Calvert New World Fund, Inc.

                           Investment Companies
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------


Katherine Stoner           Calvert Group, Ltd.                    Officer
                           Holding Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Administrative Services Co.    Officer
                           Service Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Asset Management Co., Inc.     Officer
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert Shareholder Services, Inc.     Officer
                           Transfer Agent
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert Distributors, Inc.             Officer
                           Broker-Dealer
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert-Sloan Advisers, LLC            Officer
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           First Variable Rate Fund for           Officer
                            Government Income
                           Calvert Tax-Free Reserves
                           Calvert Cash Reserves
                           Calvert Social Investment Fund
                           The Calvert Fund
                           Acacia Capital Corporation
                           Calvert Municipal Fund, Inc.
                           Calvert World Values Fund, Inc.
                           Calvert New World Fund, Inc.

                           Investment Companies
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------


Lisa Crossley Newton       Calvert Group, Ltd.                    Officer
                           Holding Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Administrative Services Co.    Officer
                           Service Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Asset Management Co., Inc.     Officer
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert Shareholder Services, Inc.     Officer
                           Transfer Agent
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert Distributors, Inc.             Officer
                           Broker-Dealer
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert-Sloan Advisers, LLC            Officer
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           First Variable Rate Fund for           Officer
                            Government Income
                           Calvert Tax-Free Reserves
                           Calvert Cash Reserves
                           Calvert Social Investment Fund
                           The Calvert Fund
                           Acacia Capital Corporation
                           Calvert Municipal Fund, Inc.
                           Calvert World Values Fund, Inc.
                           Calvert New World Fund, Inc.

                           Investment Companies
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------


Ivy Wafford Duke           Calvert Group, Ltd.                    Officer
                           Holding Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Administrative Services Co.    Officer
                           Service Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Asset Management Co., Inc.     Officer
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert Shareholder Services, Inc.     Officer
                           Transfer Agent
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert Distributors, Inc.             Officer
                           Broker-Dealer
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert-Sloan Advisers, LLC            Officer
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           First Variable Rate Fund for           Officer
                            Government Income
                           Calvert Tax-Free Reserves
                           Calvert Cash Reserves
                           Calvert Social Investment Fund
                           The Calvert Fund
                           Acacia Capital Corporation
                           Calvert Municipal Fund, Inc.
                           Calvert World Values Fund, Inc.
                           Calvert New World Fund, Inc.

                           Investment Companies
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------


Daniel K. Hayes            Calvert Asset Management Co., Inc.     Officer
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ------------------
                           First Variable Rate Fund for           Officer
                            Government Income
                           Calvert Tax-Free Reserves
                           Calvert Cash Reserves
                           Calvert Social Investment Fund
                           The Calvert Fund
                           Acacia Capital Corporation
                           Calvert Municipal Fund, Inc.
                           Calvert World Values Fund, Inc.

                           Investment Companies
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ------------------


Steve Van Order            Calvert Asset Management               Officer
                           Company, Inc.
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ------------------


Annette Krakovitz          Calvert Asset Management               Officer
                           Company, Inc.
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ------------------


John Nichols               Calvert Asset Management               Officer
                           Company, Inc.
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ------------------


David Leach                Calvert Asset Management               Officer
                           Company, Inc.
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ------------------
       


Item 29. Principal Underwriters

         (a)      Registrant's principal underwriter also underwrites
shares of First Variable Rate Fund for Government Income, Calvert
Tax-Free Reserves, Calvert Cash Reserves, The Calvert Fund, Calvert
Municipal Fund, Inc., Calvert World Values Fund, Inc., Calvert New
World Fund, Inc., and Acacia Capital Corporation.

         (b)      Positions of Underwriter's Officers and Directors

Name and Principal         Position(s) with               Position(s) with
Business Address           Underwriter                    Registrant

   
Barbara J. Krumsiek        Director and President         Sr. Vice President
                                                          and Trustee
    

Ronald M. Wolfsheimer      Director, Senior Vice          Treasurer
                           President and Chief Financial Officer

William M. Tartikoff       Director, Senior Vice          Vice President and
                           President and Secretary        Assistant Secretary

Karen Becker               Vice President, Operations     None

Steve Cohen                Vice President                 None

Geoffrey Ashton            Regional Vice President        None

   
Martin Brown               Regional Vice President        None

Janet Haley                Regional Vice President        None

Ben Ogbogu                 Regional Vice President        None
    

Susan Walker Bender        Assistant Secretary            Assistant Secretary

Katherine Stoner           Assistant Secretary            Assistant Secretary

   
Lisa Crossley Newton       Assistant Secretary            Assistant Secretary
                           and Compliance Officer
    

Ivy Wafford Duke           Assistant Secretary            Assistant Secretary

         (c)      Inapplicable.


Item 30. Location of Accounts and Records

         Ronald M. Wolfsheimer, Treasurer
         and
         William M. Tartikoff, Assistant Secretary
 
         4550 Montgomery Avenue, Suite 1000N
         Bethesda, Maryland 20814


Item 31. Management Services

         Not Applicable


Item 32. Undertakings

         a)       Not Applicable

         b)       Not Applicable

         (c)      The Registrant undertakes to furnish to each person to
                  whom a Prospectus is delivered, a copy of the
                  Registrant's latest Annual Report to Shareholders, upon
                  request and without charge.


         SIGNATURES


Pursuant to the requirements of the Securities Act of 1933 and
the Investment Company Act of 1940, the Registrant certifies that it
meets all of the requirements for effectiveness of this registration
statement pursuant to Rule 485(b) under the Securities Act of 1933 and
has duly caused this registration statement to be signed on its behalf
by the undersigned, thereto duly authorized in the City of Bethesda, and
State of Maryland, on the 21st day of January, 1998.


         CALVERT SOCIAL INVESTMENT FUND


         By:
         _________________________________
         Barbara J. Krumsiek
         Senior Vice President and Trustee


         SIGNATURES


Pursuant to the requirements of the Securities Act of 1933,
this Registration Statement has been signed below by the following
persons in the capacities indicated.


Signature                           Title                     Date


__________**____________            President and             1/21/98
D. Wayne Silby                      Trustee (Principal Executive Officer)

__________**____________            Executive Vice            1/21/98
John G. Guffey, Jr.                 President and Trustee

__________**____________            Senior Vice President     1/21/98
Barbara J. Krumsiek                 and Trustee

__________**____________            Principal Accounting      1/21/98
Ronald M. Wolfsheimer               Officer

__________**____________            Trustee                   1/21/98
Rebecca L. Adamson

__________**____________            Trustee                   1/21/98
Richard L. Baird, Jr.

________________________            Trustee                   1/21/98
Joy V. Jones

__________**____________            Trustee                   1/21/98
Terrence J. Mollner

__________**____________            Trustee                   1/21/98
Sydney Amara Morris

__________**____________            Trustee                   1/21/98
Charles T. Nason


**
Signed by Katherine Stoner pursuant to power of attorney, attached hereto.











Exhibit 10




January 21, 1998


Securities and Exchange Commission
Judiciary Plaza
450 Fifth Street, N.W.
Washington, D.C.  20549

         Re:      Exhibit 10, Form N-1A
                  Calvert Social Investment Fund
                  2-75106 and 811-3334

Ladies and Gentlemen:

         As counsel to Calvert Group, Ltd., it is my opinion that the
securities being registered by this Post-effective Amendment No. 25
will be legally issued, fully paid and non-assessable when sold.  My
opinion is based on an examination of documents related to Calvert
Social Investment Fund (the "Trust"), including its Declaration of
Trust, its By-laws, other original or Photostat copies of Trust
records, certificates of public officials, documents, papers,
statutes, and authorities as deemed necessary to form the basis of
this opinion.

         Therefore, I consent to filing this opinion of counsel with
the Securities and Exchange Commission as an Exhibit to the Trust's
Post-Effective Amendment No. 25 to its Registration Statement.

Sincerely,


/s/ Katherine Stoner

Katherine Stoner
Associate General Counsel




CONSENT OF INDEPENDENT ACCOUNTANTS

To the Board of Directors of Calvert Social Investment Fund

     We consent to the  incorporation by reference in  Post-Effective  Amendment
No. 25 to the Registration  Statement of Calvert Social  Investment Fund on Form
N-1A (File Numbers 2-75106 and 811-3334) of our report dated November 7, 1997 on
our audit of the financial  statements and financial highlights of Money Market,
Managed  Growth,  Bond and Equity  Portfolios,  which  report is included in the
Annual  Report to  Shareholders  for the year ended  September 30, 1997 which is
incorporated by reference in the Registration  Statement. We also consent to the
reference to our firm under the caption "Independent Accountants and Custodians"
in the Statement of Additional Information.

COOPERS & LYBRAND L.L.P.
Baltimore, Maryland
January 21, 1998



                               POWER OF ATTORNEY


         I, the undersigned Trustee/Director of Calvert Social Investment Fund
(the "Fund"), hereby constitute Ronald M. Wolfsheimer, William M. Tartikoff,
Susan Walker Bender, Katherine Stoner, Lisa Crossley, and Ivy Wafford Duke my
true and lawful attorneys, with full power to each of them, to sign for me and
in my name in the appropriate capacities, all registration statements and
amendments filed by the Fund with any federal or state agency, and to do all
such things in my name and behalf necessary for registering and maintaining
registration or exemptions from registration of the Fund with any government
agency in any jurisdiction, domestic or foreign.

         The same persons are authorized generally to do all such things in my
name and behalf to comply with the provisions of all federal, state and
foreign laws, regulations, and policy pronouncements affecting the Fund,
including, but not limited to, the Securities Act of 1933, the Securities
Exchange Act of 1934, the Investment Company Act of 1940, the Investment
Advisers Act of 1940, and all state laws regulating the securities industry.

         The same persons are further authorized to sign my name to any
document needed to maintain the lawful operation of the Fund in connection
with any transaction approved by the Board of Trustee/Directors.

         When any of the above-referenced attorneys signs my name to any
document in connection with maintaining the lawful operation of the Fund, the
signing is automatically ratified and confirmed by me by virtue of this Power
of Attorney.

         WITNESS my hand on the date set forth below.


December 2, 1997
Date                                        /Signature/

Cathy Mulligan                              Barbara Krumsiek
Witness                                     Name of Trustee/Director


<PAGE>


                               POWER OF ATTORNEY


         I, the undersigned Trustee/Director of Calvert Social Investment Fund
(the "Fund"), hereby constitute Ronald M. Wolfsheimer, William M. Tartikoff,
Susan Walker Bender, Katherine Stoner, Lisa Crossley, and Ivy Wafford Duke my
true and lawful attorneys, with full power to each of them, to sign for me and
in my name in the appropriate capacities, all registration statements and
amendments filed by the Fund with any federal or state agency, and to do all
such things in my name and behalf necessary for registering and maintaining
registration or exemptions from registration of the Fund with any government
agency in any jurisdiction, domestic or foreign.

         The same persons are authorized generally to do all such things in my
name and behalf to comply with the provisions of all federal, state and
foreign laws, regulations, and policy pronouncements affecting the Fund,
including, but not limited to, the Securities Act of 1933, the Securities
Exchange Act of 1934, the Investment Company Act of 1940, the Investment
Advisers Act of 1940, and all state laws regulating the securities industry.

         The same persons are further authorized to sign my name to any
document needed to maintain the lawful operation of the Fund in connection
with any transaction approved by the Board of Trustee/Directors.

         When any of the above-referenced attorneys signs my name to any
document in connection with maintaining the lawful operation of the Fund, the
signing is automatically ratified and confirmed by me by virtue of this Power
of Attorney.

         WITNESS my hand on the date set forth below.

December 6, 1997
Date                                        /Signature/

Ida Maupin Findlay                          Rebecca L. Adamson
Witness                                     Name of Trustee/Director


<PAGE>

                               POWER OF ATTORNEY


         I, the undersigned Trustee/Director of Calvert Social Investment Fund
(the "Fund"), hereby constitute Ronald M. Wolfsheimer, William M. Tartikoff,
Susan Walker Bender, Katherine Stoner, Lisa Crossley, and Ivy Wafford Duke my
true and lawful attorneys, with full power to each of them, to sign for me and
in my name in the appropriate capacities, all registration statements and
amendments filed by the Fund with any federal or state agency, and to do all
such things in my name and behalf necessary for registering and maintaining
registration or exemptions from registration of the Fund with any government
agency in any jurisdiction, domestic or foreign.

         The same persons are authorized generally to do all such things in my
name and behalf to comply with the provisions of all federal, state and
foreign laws, regulations, and policy pronouncements affecting the Fund,
including, but not limited to, the Securities Act of 1933, the Securities
Exchange Act of 1934, the Investment Company Act of 1940, the Investment
Advisers Act of 1940, and all state laws regulating the securities industry.

         The same persons are further authorized to sign my name to any
document needed to maintain the lawful operation of the Fund in connection
with any transaction approved by the Board of Trustee/Directors.

         When any of the above-referenced attorneys signs my name to any
document in connection with maintaining the lawful operation of the Fund, the
signing is automatically ratified and confirmed by me by virtue of this Power
of Attorney.

         WITNESS my hand on the date set forth below.

May 7, 1997
Date                                        /Signature/

Charles T. Nason                            Richard L. Baird, Jr.
Witness                                     Name of Trustee/Director

<PAGE>

                               POWER OF ATTORNEY


         I, the undersigned Trustee/Director of Calvert Social Investment Fund
(the "Fund"), hereby constitute Ronald M. Wolfsheimer, William M. Tartikoff,
Susan Walker Bender, Katherine Stoner, Lisa Crossley, and Ivy Wafford Duke my
true and lawful attorneys, with full power to each of them, to sign for me and
in my name in the appropriate capacities, all registration statements and
amendments filed by the Fund with any federal or state agency, and to do all
such things in my name and behalf necessary for registering and maintaining
registration or exemptions from registration of the Fund with any government
agency in any jurisdiction, domestic or foreign.

         The same persons are authorized generally to do all such things in my
name and behalf to comply with the provisions of all federal, state and
foreign laws, regulations, and policy pronouncements affecting the Fund,
including, but not limited to, the Securities Act of 1933, the Securities
Exchange Act of 1934, the Investment Company Act of 1940, the Investment
Advisers Act of 1940, and all state laws regulating the securities industry.

         The same persons are further authorized to sign my name to any
document needed to maintain the lawful operation of the Fund in connection
with any transaction approved by the Board of Trustee/Directors.

         When any of the above-referenced attorneys signs my name to any
document in connection with maintaining the lawful operation of the Fund, the
signing is automatically ratified and confirmed by me by virtue of this Power
of Attorney.

         WITNESS my hand on the date set forth below.

May 7, 1997
Date                                        /Signature/

M. Charito Kruvant                          John G. Guffey, Jr.
Witness                                     Name of Trustee/Director


<PAGE>
                               POWER OF ATTORNEY


         I, the undersigned Trustee/Director of Calvert Social Investment Fund
(the "Fund"), hereby constitute Ronald M. Wolfsheimer, William M. Tartikoff,
Susan Walker Bender, Katherine Stoner, Lisa Crossley, and Ivy Wafford Duke my
true and lawful attorneys, with full power to each of them, to sign for me and
in my name in the appropriate capacities, all registration statements and
amendments filed by the Fund with any federal or state agency, and to do all
such things in my name and behalf necessary for registering and maintaining
registration or exemptions from registration of the Fund with any government
agency in any jurisdiction, domestic or foreign.

         The same persons are authorized generally to do all such things in my
name and behalf to comply with the provisions of all federal, state and
foreign laws, regulations, and policy pronouncements affecting the Fund,
including, but not limited to, the Securities Act of 1933, the Securities
Exchange Act of 1934, the Investment Company Act of 1940, the Investment
Advisers Act of 1940, and all state laws regulating the securities industry.

         The same persons are further authorized to sign my name to any
document needed to maintain the lawful operation of the Fund in connection
with any transaction approved by the Board of Trustee/Directors.

         When any of the above-referenced attorneys signs my name to any
document in connection with maintaining the lawful operation of the Fund, the
signing is automatically ratified and confirmed by me by virtue of this Power
of Attorney.

         WITNESS my hand on the date set forth below.

November 29, 1997
Date                                        /Signature/

Marybeth Home                               Terrence J. Mollner
Witness                                     Name of Trustee/Director


<PAGE>

                               POWER OF ATTORNEY


         I, the undersigned Trustee/Director of Calvert Social Investment Fund
(the "Fund"), hereby constitute Ronald M. Wolfsheimer, William M. Tartikoff,
Susan Walker Bender, Katherine Stoner, Lisa Crossley, and Ivy Wafford Duke my
true and lawful attorneys, with full power to each of them, to sign for me and
in my name in the appropriate capacities, all registration statements and
amendments filed by the Fund with any federal or state agency, and to do all
such things in my name and behalf necessary for registering and maintaining
registration or exemptions from registration of the Fund with any government
agency in any jurisdiction, domestic or foreign.

         The same persons are authorized generally to do all such things in my
name and behalf to comply with the provisions of all federal, state and
foreign laws, regulations, and policy pronouncements affecting the Fund,
including, but not limited to, the Securities Act of 1933, the Securities
Exchange Act of 1934, the Investment Company Act of 1940, the Investment
Advisers Act of 1940, and all state laws regulating the securities industry.

         The same persons are further authorized to sign my name to any
document needed to maintain the lawful operation of the Fund in connection
with any transaction approved by the Board of Trustee/Directors.

         When any of the above-referenced attorneys signs my name to any
document in connection with maintaining the lawful operation of the Fund, the
signing is automatically ratified and confirmed by me by virtue of this Power
of Attorney.

         WITNESS my hand on the date set forth below.

May 7, 1997
Date                                        /Signature/

Edwidge Saint Felix                         Sydney Amara Morris
Witness                                     Name of Trustee/Director


<PAGE>

                               POWER OF ATTORNEY


         I, the undersigned Trustee/Director of Calvert Social Investment Fund
(the "Fund"), hereby constitute Ronald M. Wolfsheimer, William M. Tartikoff,
Susan Walker Bender, Katherine Stoner, Lisa Crossley, and Ivy Wafford Duke my
true and lawful attorneys, with full power to each of them, to sign for me and
in my name in the appropriate capacities, all registration statements and
amendments filed by the Fund with any federal or state agency, and to do all
such things in my name and behalf necessary for registering and maintaining
registration or exemptions from registration of the Fund with any government
agency in any jurisdiction, domestic or foreign.

         The same persons are authorized generally to do all such things in my
name and behalf to comply with the provisions of all federal, state and
foreign laws, regulations, and policy pronouncements affecting the Fund,
including, but not limited to, the Securities Act of 1933, the Securities
Exchange Act of 1934, the Investment Company Act of 1940, the Investment
Advisers Act of 1940, and all state laws regulating the securities industry.

         The same persons are further authorized to sign my name to any
document needed to maintain the lawful operation of the Fund in connection
with any transaction approved by the Board of Trustee/Directors.

         When any of the above-referenced attorneys signs my name to any
document in connection with maintaining the lawful operation of the Fund, the
signing is automatically ratified and confirmed by me by virtue of this Power
of Attorney.

         WITNESS my hand on the date set forth below.

December 2, 1997
Date                                        /Signature/

Freda S. Amar                               Charles T. Nason
Witness                                     Name of Trustee/Director

<PAGE>

                               POWER OF ATTORNEY


         I, the undersigned Trustee/Director of Calvert Social Investment Fund
(the "Fund"), hereby constitute Ronald M. Wolfsheimer, William M. Tartikoff,
Susan Walker Bender, Katherine Stoner, Lisa Crossley, and Ivy Wafford Duke my
true and lawful attorneys, with full power to each of them, to sign for me and
in my name in the appropriate capacities, all registration statements and
amendments filed by the Fund with any federal or state agency, and to do all
such things in my name and behalf necessary for registering and maintaining
registration or exemptions from registration of the Fund with any government
agency in any jurisdiction, domestic or foreign.

         The same persons are authorized generally to do all such things in my
name and behalf to comply with the provisions of all federal, state and
foreign laws, regulations, and policy pronouncements affecting the Fund,
including, but not limited to, the Securities Act of 1933, the Securities
Exchange Act of 1934, the Investment Company Act of 1940, the Investment
Advisers Act of 1940, and all state laws regulating the securities industry.

         The same persons are further authorized to sign my name to any
document needed to maintain the lawful operation of the Fund in connection
with any transaction approved by the Board of Trustee/Directors.

         When any of the above-referenced attorneys signs my name to any
document in connection with maintaining the lawful operation of the Fund, the
signing is automatically ratified and confirmed by me by virtue of this Power
of Attorney.

         WITNESS my hand on the date set forth below.

December 8, 1997
Date                                        /Signature/

Katherine Stoner                            D. Wayne Silby
Witness                                     Name of Trustee/Director


<PAGE>

                               POWER OF ATTORNEY


         I, the undersigned officer of Calvert Social Investment Fund, Calvert
World Values Fund, Acacia Capital Corporation, Calvert New World Fund, First
Variable Rate Fund, Calvert Tax-Free Reserves, Calvert Cash Reserves, The
Calvert Fund and Calvert Municipal Fund (each, respectively, the "Fund"),
hereby constitute William M. Tartikoff, Susan Walker Bender, Katherine Stoner,
Lisa Crossley, and Ivy Wafford Duke my true and lawful attorneys, with full
power to each of them, to sign for me and in my name in the appropriate
capacities, all registration statements and amendments filed by the Fund with
any federal or state agency, and to do all such things in my name and behalf
necessary for registering and maintaining registration or exemptions from
registration of the Fund with any government agency in any jurisdiction,
domestic or foreign.

         The same persons are authorized generally to do all such things in my
name and behalf to comply with the provisions of all federal, state and
foreign laws, regulations, and policy pronouncements affecting the Fund,
including, but not limited to, the Securities Act of 1933, the Securities
Exchange Act of 1934, the Investment Company Act of 1940, the Investment
Advisers Act of 1940, and all state laws regulating the securities industry.

         The same persons are further authorized to sign my name to any
document needed to maintain the lawful operation of the Fund in connection
with any transaction approved by the Board of Trustee/Directors.

         When any of the above-referenced attorneys signs my name to any
document in connection with maintaining the lawful operation of the Fund, the
signing is automatically ratified and confirmed by me by virtue of this Power
of Attorney.

         WITNESS my hand on the date set forth below.

December 16, 1997
Date                                        /Signature/

William M. Tartikoff                        Ronald M. Wolfsheimer
Witness                                     Name of Officer




<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000356682
<NAME> CALVERT SOCIAL INVESTMENT FUND
<SERIES>
   <NUMBER> 134
   <NAME> MONEY MARKET PORTFOLIO
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          SEP-30-1997
<PERIOD-START>                             APR-01-1997
<PERIOD-END>                               SEP-30-1997
<INVESTMENTS-AT-COST>                           163689
<INVESTMENTS-AT-VALUE>                          163689
<RECEIVABLES>                                     2530
<ASSETS-OTHER>                                     317
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  166536
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          426
<TOTAL-LIABILITIES>                                426
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        166140
<SHARES-COMMON-STOCK>                           166163
<SHARES-COMMON-PRIOR>                           166569
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                           (30)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                                    166110
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                 9399
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                    1451
<NET-INVESTMENT-INCOME>                           7948
<REALIZED-GAINS-CURRENT>                             0
<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                             7949
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                       (7948)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                         169709
<NUMBER-OF-SHARES-REDEEMED>                   (177597)
<SHARES-REINVESTED>                               7482
<NET-CHANGE-IN-ASSETS>                           (405)
<ACCUMULATED-NII-PRIOR>                              1
<ACCUMULATED-GAINS-PRIOR>                         (49)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              830
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   1475
<AVERAGE-NET-ASSETS>                            165937
<PER-SHARE-NAV-BEGIN>                            1.000
<PER-SHARE-NII>                                  0.048
<PER-SHARE-GAIN-APPREC>                              0
<PER-SHARE-DIVIDEND>                           (0.048)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                                1.0
<EXPENSE-RATIO>                                   0.87
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000356682
<NAME> CALVERT SOCIAL INVESTMENT FUND
<SERIES>
   <NUMBER> 105
   <NAME> MANAGED GROWTH PORTFOLIO, CLASS A
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          SEP-30-1997
<PERIOD-START>                             APR-01-1997
<PERIOD-END>                               SEP-30-1997
<INVESTMENTS-AT-COST>                           575827
<INVESTMENTS-AT-VALUE>                          681286
<RECEIVABLES>                                     6778
<ASSETS-OTHER>                                     574
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  688638
<PAYABLE-FOR-SECURITIES>                          3387
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         1048
<TOTAL-LIABILITIES>                               4435
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        511991
<SHARES-COMMON-STOCK>                            19362
<SHARES-COMMON-PRIOR>                            18964
<ACCUMULATED-NII-CURRENT>                          692
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                          57869
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                        104755
<NET-ASSETS>                                    675307
<DIVIDEND-INCOME>                                 3234
<INTEREST-INCOME>                                19641
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                    6974
<NET-INVESTMENT-INCOME>                          15901
<REALIZED-GAINS-CURRENT>                         77992
<APPREC-INCREASE-CURRENT>                        30840
<NET-CHANGE-FROM-OPS>                           124733
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                      (15615)
<DISTRIBUTIONS-OF-GAINS>                       (39195)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                          91060
<NUMBER-OF-SHARES-REDEEMED>                   (131005)
<SHARES-REINVESTED>                              50875
<NET-CHANGE-IN-ASSETS>                           80853
<ACCUMULATED-NII-PRIOR>                            405
<ACCUMULATED-GAINS-PRIOR>                        19072
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             3693
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   7078
<AVERAGE-NET-ASSETS>                            619679
<PER-SHARE-NAV-BEGIN>                            31.35
<PER-SHARE-NII>                                   0.83
<PER-SHARE-GAIN-APPREC>                           5.61
<PER-SHARE-DIVIDEND>                            (0.81)
<PER-SHARE-DISTRIBUTIONS>                       (2.10)
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              34.88
<EXPENSE-RATIO>                                   1.12
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

Exhibit 8

CUSTODIAN AGREEMENT

This Agreement, dated as of March 5, 1992, is between State Street Bank and
Trust Company, a Massachusetts trust company, having its principal place of
business at 225 Franklin Street, Boston, Massachusetts, 02110 ("State Street"
or the "Custodian"), and Calvert Social Investment Fund, a Massachusetts
business trust (the "Fund"), having its principal place of business at 4550
Montgomery Avenue, Suite 1000N, Bethesda, Maryland, 20814. In consideration of
the mutual covenants and agreements contained in this Agreement, the parties
agree as follows:

1.       Employment of Custodian and Property to be Held by It

The Fund hereby employs State Street as the custodian of assets, including
securities, of the Fund's portfolios designated in Appendix A ("Portfolios").
The Portfolios agree to deliver to the Custodian all securities and cash now
or hereafter owned or acquired, and all payments of income, principal or
capital distributions received by them on securities owned at any given time,
and the cash consideration received for shares of the Portfolios. The
Custodian will not be responsible for any property held or received by any
Portfolio and not delivered to the Custodian.

Upon receipt of "Proper Instructions" (as defined in Section 4), the Custodian
will employ one or more subcustodians located in the United States, but only
in accordance with an applicable vote by the Board of Trustees of the Fund,
and provided that the Custodian will have no more or less responsibility or
liability to the Fund on account of any actions or omissions of any
subcustodian so employed than any such subcustodian has to the Custodian, and
further provided that the Custodian will not release the subcustodian from any
responsibility or liability unless mutually agreed on by the parties in
writing.

All duties undertaken by the Custodian will be performed in a timely manner.
What constitutes timeliness in connection with a particular action will be
determined by the standards of the industry as they apply to the specific type
of transaction in question and taking into account relevant facts.

2.       Duties of the Custodian with Respect to Property of the Fund

2.1 Holding Securities. The Custodian will hold and physically segregate for
the account of each Portfolio all non-cash property other than (a) securities
maintained in a clearing agency acting as a securities depository or in a
book-entry system authorized by the U.S. Department of the Treasury
(collectively referred to as "Securities System;" see Section 2.10), and (b)
commercial paper of an issuer for which the Custodian acts as issuing and
paying agent ("Direct Paper") which is deposited and/or maintained in the
Direct Paper System of the Custodian (see Section 2.11).

2.2 Delivery of Securities. The Custodian will release and deliver Portfolio
securities held by the Custodian or in a Securities System account of the
Custodian or in the Custodian's Direct Paper book entry system account
("Direct Paper System Account") only upon receipt of Proper Instructions,
which may be continuing instructions when deemed appropriate by mutual
agreement of the parties, and only in the following cases:

1) Sale. Upon the sale of and receipt of payment for a Portfolio's securities;

2) Repurchase Agreements. Upon receipt of payment in connection with any
repurchase agreement entered into by the Fund related to the securities being
held;

3) Securities System. In She case of a sale effected through a Securities
System, in accordance with the provisions of Section 2.10;

4) Tender Offer. To the depository agent or other receiving agent in
connection with tender or other similar offers for a Portfolio's securities;

5) Redemption by issuer. To the issuer or its agent when a Portfolio's
securities are called, redeemed, retired or otherwise become payable; provided
that, in any such case, the cash or other consideration is to be delivered to
the Custodian;

6) Transfer to Issuer, Nominee; Exchange. To the issuer or its agent for
transfer into the name of a Portfolio or into the name of any nominee or
nominees of the Custodian or into the name or nominee name of any agent
appointed pursuant to this Agreement or into the name or nominee name of any
subcustodian appointed pursuant to Section 1; or for exchange for a different
number of bonds, certificates or other evidence representing the same
aggregate face amount or number of units and bearing the same interest rate,
maturity date and call provisions, if any; provided that, in any such case,
the new securities are to be delivered to the Custodian;

7) Sale to Broker or Dealer. Upon the sale of a Portfolio's securities to the
broker or its clearing agent or dealer, against a receipt, for examination in
accordance with "street delivery" custom; provided that the Custodian will
have no responsibility or liability for any loss arising from the delivery of
such securities prior to receiving payment for such securities except as may
arise from the Custodian's failure to act in accordance with its duties as set
forth in this Agreement.

8) Exchange or Conversion. For exchange or conversion pursuant to any plan of
merger, consolidation, recapitalization, reorganization, split-up of shares,
change of par value or readjustment of the securities of the issuer of such
securities, or pursuant to provisions for conversion contained in such
securities, or pursuant to any deposit agreement provided that, in any such
case, the new securities and cash, if any, are to be delivered to the
Custodian;

9) Warrants. Rights, in the case of warrants, rights or similar securities,
the surrender thereof in the exercise of such warrants, rights or similar
securities or the surrender of interim receipts or temporary securities for
definitive securities; provided that, in any such case, the new securities and
cash, if any, are to be delivered to the Custodian;

10) Loans of Securities. For delivery in connection with any loans of
securities made by a Portfolio, made only against receipt of adequate
collateral as agreed on from time to time by the Custodian and the Fund on
behalf of the Portfolio. Loans may be in the form of cash, obligations issued
by the United States government, its agencies or instrumentalities, or such
other property as mutually agreed by the parties, except that in connection
with any loans for which collateral is to be credited to the Custodian's
account in the book-entry system authorized by the U.S. Department of the
Treasury, the Custodian will not be held liable or responsible for the
delivery of securities owned by the Portfolio prior to the receipt of such
collateral, unless the Custodian fails to act in accordance with its duties
set forth in this Agreement;

11) Borrowings. For delivery as security in connection with any borrowings by
a Portfolio requiring a pledge of assets by the Portfolio, made only against
receipt of amounts borrowed; except, where additional collateral is required
to secure a borrowing already made, further securities may be released for
that purpose, subject to Proper Instructions;

12) Options. For delivery in accordance with the provisions of any agreement
among the Fund, the Custodian and a broker dealer registered under the
Securities Exchange Act of 1934 (the "Exchange Act") and a member of The
National Association of Securities Dealers, Inc. ("NASD"), relating to
compliance with the rules of The Options Clearing Corporation, any registered
national securities exchange, any similar organization or organizations, or
the Investment Company Act of 1940, regarding escrow or other arrangements in
connection with transactions by the Fund;

13) Futures. For delivery in accordance with the provisions of any agreement
among the Fund, the Custodian, and a Futures Commission merchant registered
under the Commodity Exchange Act, relating to compliance with the rules of the
Commodity Futures Trading Commission and/or any Contract Market, any similar
organization or organizations, or the Investment Company Act of 1940,
regarding account deposits in connection with transactions by the Fund;

14) In-Kind Distributions. Upon receipt of instructions from the Fund's
transfer agent, for delivery to the transfer agent or to the holders of shares
in connection with distributions in kind, as may be described from time to
time in the Portfolio's currently effective prospectus and statement of
additional information, in satisfaction of shareholder requests for repurchase
or redemption;

15) Miscellaneous. For any other proper corporate purpose, made only upon
receipt of, in addition to Proper Instructions, a certified copy of a
resolution of the Board of Trustees signed by an officer of the Fund and
certified by the Secretary or an Assistant Secretary, specifying the
securities to be delivered, setting forth the purpose for which such delivery
is to be made, declaring such purpose to be a proper corporate purpose, and
naming the person or persons to whom delivery of the securities will be made.

In all cases, payments to the Portfolio will be made in cash, by a certified
check or a treasurer's or cashier's check of a bank, by effective bank wire
transfer through the Federal Reserve Wire System or, if appropriate, outside
of the Federal Reserve Wire System and subsequent credit to the Fund's
Custodial account, or, in case of delivery through a stock clearing company,
by book-entry credit by the stock clearing company in accordance with the then
current street custom, or such other form of payment as may be mutually agreed
on by the parties, in all such cases collected funds to be promptly credited
to the Fund.

2.3 Registration of Securities. Securities held by the Custodian (other than
bearer securities) will be registered (a) in the name of the Portfolio or (b)
in the name of any nominee of the Portfolio or of any nominee of the Custodian
assigned exclusively to the Portfolio, unless the Fund has authorized in
writing the appointment of a nominee to be used in common with other
registered investment companies having the same investment adviser as any of
the Portfolios, or in the name or nominee name of any agent appointed pursuant
to Section 2.9 or in the name or nominee name of any subcustodian appointed
pursuant to Section 1. All securities accepted by the Custodian on behalf of a
Portfolio under the terms of this Agreement will be in "street name" or other
good delivery form.

2.4 Bank Accounts. The Custodian will open and maintain a separate bank
account or accounts in the name of each Portfolio, subject only to draft or
order by the Custodian acting pursuant to the terms of this Agreement. The
Custodian will hold in the account(s), in accordance with the provisions of
this Agreement, all cash received by it from or for the account of the Fund,
other than cash maintained by the Fund in a bank account established and used
in accordance with Rule 17f-3 under the Investment Company Act of 1940. Funds
held by the Custodian for a Portfolio may be deposited for the Portfolio's
credit in the bank affiliate of the Custodian or in such other banks or trust
companies as the Custodian may in its discretion deem necessary or desirable;
provided, however, that every such bank or trust company must be qualified to
act as a custodian under the Investment Company Act of 1940. Funds will be
deposited by the Custodian in its capacity as Custodian and will be
withdrawable by the Custodian only in that capacity.

2.5 Sale of Shares and Availability of Federal Funds. Upon mutual agreement
between the Fund and the Custodian, the Custodian will, upon the receipt of
Proper Instructions, make federal funds available to the Portfolios as of
specified times agreed upon from time to time by the Fund and the Custodian in
the amount of checks received in payment for shares of the Portfolio which are
deposited into the Portfolio's account.

2.6 Collection of Income, Dividends. The Custodian will collect on a timely
basis all income and other payments with respect to registered securities held
to which the Portfolios are entitled either by law or pursuant to custom in
the securities business. The Custodian will also collect on a timely basis all
income and other payments with respect to bearer securities if, on the date of
payment by the issuer, the securities are held by the Custodian or its agent.
The Custodian will credit a Portfolio's account with all income or other
payments on securities held in a domestic depository, on the contractual
payment date, in Clearinghouse Funds or Federal Funds as the case may be,
regardless of whether the Custodian succeeds in collecting the item on a
timely basis. This credit is subject to the Custodian's right to reverse the
credit in the event of a default in the issuer's payment of such income.
Without limiting the generality of the foregoing, the Custodian will detach
and present for payment all coupons and other income items requiring
presentation as and when they become due and will collect interest when due on
securities held pursuant to this Agreement. The Custodian will also receive
and collect all stock dividends, rights and other items of like nature as and
when they become due or payable. Income due the Portfolio on securities loaned
pursuant to the provisions of Section 2.2(10) will be the responsibility of
the Portfolio; the Custodian will have no duty or responsibility in connection
with loaned securities other than to provide the Portfolio with such
information or data as may be necessary to assist the Portfolio in arranging
for the timely delivery to the Custodian of the income to which the Fund is
properly entitled.

2.7 Payment of Portfolio Monies. Upon receipt of Proper Instructions, which
may be continuing instructions when deemed appropriate by mutual agreement of
the parties, the Custodian will pay out monies of a Portfolio in the following
cases only:

1) Purchases. Upon the purchase of domestic securities, options, futures
contracts or options on futures contracts for the account of the Portfolio but
only (a) against the delivery of such securities, or evidence of title to such
options, futures contracts or options on futures contracts, to the Custodian
(or any bank, banking firm or trust company doing business in the United
States or abroad which is qualified under the Investment Company Act of 1940,
as amended, to act as a custodian and has been designated by the Custodian as
its agent for this purpose in accordance with Section 2.9 of this Agreement)
registered in the name of the Portfolio or in the name of a nominee of the
Portfolio or of the Custodian referred to in Section 2.3 of this Agreement, or
in other proper form for transfer; (b) in the case of a purchase effected
through a Securities System, in accordance with the conditions set forth in
Section 2.10 of this Agreement; (c) in the case of a purchase involving the
Direct Paper System, in accordance with the conditions set forth in Section
2.11; or (d) in the case of repurchase agreements entered into between the
Fund and the Custodian, or another bank, or a broker-dealer which is a member
of NASD, (i) against delivery of the securities either in certificate form or
through an entry crediting the Custodian's account at the Federal Reserve Bank
with such securities or (ii) against delivery of the receipt evidencing
purchase by the Fund of securities owned by the Custodian along with written
evidence of the agreement by the Custodian to repurchase such securities from
the Fund. All coupon bonds accepted by the Custodian must have the coupons
attached or must be accompanied by a due bill or a check payable on coupon
payable date for the interest due on that date. Payment may be made for
purchases in advance of receipt of securities when the Custodian receives
authorization to do so on a case-by-case basis; however, the Custodian will be
absolutely liable to the Portfolio for such payment in the absence of specific
written instructions to make the payment.

2) Exchanges. In connection with conversion, exchange or surrender of
securities owned by the Fund as set forth in Section 2.2 hereof;

3) Redemptions. For the redemption or repurchase of shares issued by the Fund
as set forth in this Agreement;

4) Expense and Liability. For the payment of any expense or liability incurred
by the Fund, including but not limited to the following payments for the
account of the Fund: interest, taxes, management, accounting, transfer agent
and legal fees, and operating expenses of the Fund whether or not such
expenses are to be in whole or part capitalized or treated as deferred
expenses;

5) Dividends. For the payment of any dividends or other distributions to
shareholders declared by the Fund;

6) Short Sale Dividend. For payment of the amount of dividends received in
respect of securities sold short;

7) Loan. For repayment of a loan upon redelivery of pledged securities and
upon surrender of the note(s), if any, evidencing the loan;

8) Miscellaneous. For any other proper purpose upon receipt of, in addition to
Proper Instructions, a certified copy of a resolution of the Board of Trustees
signed by an officer of the Fund and certified by its Secretary or an
Assistant Secretary, specifying the amount of such payment, setting forth the
purpose for which such payment is to be made, declaring such purpose to be a
proper purpose, and naming the person or persons to whom such payment is to be
made.

2.8 Appointment of Agents. At its discretion, the Custodian may at any time
appoint (and may at any time remove) any other bank or trust company qualified
to act as a custodian under the Investment Company Act of 1940 as its agent to
carry out such of the provisions of this Section 2 as the Custodian may from
time to time direct; provided, however, that the appointment of any agent will
not relieve the Custodian of its responsibilities or liabilities under this
Agreement.

2.9 Deposit of Securities in Securities Systems. The Custodian may deposit
and/or maintain a Portfolio's securities in a Securities System in accordance
with applicable Federal Reserve Board and Securities and Exchange Commission
rules and regulations, if any, and subject to the following provisions:

1) Account of Custodian. The Custodian may keep a Portfolio's securities in a
Securities System provided that such securities are represented in an account
of the Custodian in the Securities System that does not include any assets of
the Custodian other than assets held as a fiduciary, custodian or otherwise
for customers;

2) Records. The Custodian's records, with respect to a Portfolio's securities
maintained in a Securities System, must identify by book entry those
securities belonging to the Portfolio;

3) Payment/Delivery.

(a) Subject to Section 2.7 (Payment of Fund Monies), the Custodian will pay
for a Portfolio's securities upon (i) receipt of advice from the Securities
System that such securities have been transferred to the Account, and (ii) the
making of an entry on the records of the Custodian to reflect such payment and
transfer for the account of the Portfolio;

(b) Subject to Section 2.2 (Delivery of Securities), the Custodian will
transfer a Portfolio's securities upon (i) receipt of advice from the
Securities System that payment for such securities has been transferred to the
Custodian's account, and (ii) the making of an entry on the records of the
Custodian to reflect such transfer and payment for the account of the
Portfolio;

(c) Copies of all advices from the Securities System of transfers of a
Portfolio's securities will identify the Portfolio, be maintained for the
Portfolio by the Custodian and be provided to the Portfolio at its request.
The Custodian will furnish daily transaction sheets reflecting each day's
transactions in the Securities System for the account of the Portfolio.

4) Reports. The Custodian will provide the Portfolio with any report obtained
by the Custodian on the Securities System's accounting system, internal
accounting control and procedures for safeguarding securities deposited in the
Securities System, and further agrees to provide the Portfolio with copies of
any documentation it has relating to its arrangements with the Securities
Systems as set forth in this Agreement or as otherwise required by the
Securities and Exchange Commission or any other regulatory agency or
organization;

5) Liability. Anything to the contrary in this Agreement notwithstanding, the
Custodian will be liable to the Portfolio for any loss or expense, which may
include reasonable attorneys fees, or damage to the Portfolio resulting from
use of the Securities System by reason of any negligence, misfeasance or
misconduct of the Custodian, its agents, or any employee or agent of the
Custodian or agent, or from failure of the Custodian or any such agent to
enforce effectively such rights as it may have against the Securities System.
At the election of the Portfolio, it will be entitled to be subrogated to the
rights of the Custodian with respect to any claim against the Securities
System or any other person that the Custodian may have as a consequence of any
such loss, expense or damage if and to the extent that the Portfolio has not
been made whole for any such loss, expense or damage.

2.10 Fund Assets Held in the Custodian's Direct Paper System. The Custodian
may deposit and/or maintain securities owned by a Portfolio in the Direct
Paper System of the Custodian subject to the following provisions:

1) No transaction relating to securities in the Direct Paper System will be
effected in the absence of Proper Instructions;

2) The Custodian may keep securities of a Portfolio in the Direct Paper System
only if such securities are represented in an account of the Custodian in the
Direct Paper System that does not include any assets of the Custodian other
than assets held as a fiduciary, custodian or otherwise for customers;

3) The records of the Custodian, with respect to securities of a Portfolio,
that are maintained in the Direct Paper System will identify by book entry
those securities belonging to the Portfolio;

4) The Custodian will pay for securities purchased for the account of a
Portfolio upon the making of an entry on the records of the Custodian to
reflect such payment and transfer of securities to the account of the
Portfolio. The Custodian will transfer securities sold for the account of the
Fund upon the making of an entry on the records of the Custodian to reflect
such transfer and receipt of payment for the account of the Fund;

5) The Custodian will furnish each Portfolio confirmation of every transfer to
or from its account, in the form of a written advice or notice, of Direct
Paper on the next business day following such transfer and will furnish to the
Portfolio copies of daily transaction sheets reflecting each day's transaction
in the Securities System for its account;

6) The Custodian will provide each Portfolio with any report on its system of
internal accounting control as the Portfolio may reasonably request from time
to time;

2.11 Segregated Account. The Custodian will, upon receipt of Proper
Instructions, establish and maintain a segregated account or accounts for and
on behalf of each Portfolio, into which may be transferred cash and/or
securities, including securities maintained in an account by the Custodian
pursuant to Section 2.9 of this Agreement: (i) in accordance with the
provisions of any agreement among the Fund, the Custodian and a broker-dealer
registered under the Exchange Act and a member of the NASD (or any futures
commission merchant registered under the Commodity Exchange Act), relating to
compliance with the rules of the Options Clearing Corporation and of any
registered national securities exchange (or the Commodity Futures Trading
Commission or any registered contract market), or of any similar organization
or organizations, regarding escrow or other arrangements in connection with
transactions by a Portfolio, (ii) for purposes of segregating cash or
government securities in connection with options purchased, sold or written by
a Portfolio or commodity futures contracts or options purchased or sold by the
Portfolio, (iii) for the purposes of compliance by the Fund with the
procedures required by Investment Company Act Release No. 10666, or any
subsequent release, rule or policy of the Securities and Exchange Commission
relating to the maintenance of segregated accounts by registered investment
companies and (iv) for other proper corporate purposes, but only in the case
of clause (iv) upon receipt of, in addition to Proper Instructions, a
certified copy of a resolution of the Board of Trustees setting forth the
purpose or purposes of such segregated account and declaring such purposes to
be proper corporate purposes.

2.12 Ownership Certificates for Tax Purposes. The Custodian will execute
ownership and other certificates and affidavits for all federal and state tax
purposes in connection with receipt of income or other payments for a
Portfolio's securities and in connection with transfers of such securities.

2.13 Proxies. If the securities are registered other than in the name of a
Portfolio or a nominee of the Portfolio, the Custodian will cause all proxies
promptly to be executed by the registered holder of such securities, without
indication of the manner in which such proxies are to be voted, and will
promptly deliver to the Portfolio all proxy soliciting materials and all
notices relating to such securities.

2.14 Communications Relating to Fund Securities. The Custodian will transmit
promptly to each Portfolio all written information (including, without
limitation, pendency of calls and maturities of domestic securities and
expirations of rights in connection therewith and notices of exercise of call
and put options written by the Portfolio and the maturity of futures contracts
purchased or sold by the Portfolio) received by the Custodian from issuers of
the Portfolio's securities by the Custodian, an agent appointed under Section
2.9, or subcustodian appointed under Section 1. With respect to tender or
exchange offers, the Custodian will transmit promptly to the Portfolio all
written information received by the Custodian, an agent appointed under
Section 2.9, or subcustodian appointed under Section 1 from issuers of the
securities whose tender or exchange is sought and from the party (or its
agents) making the tender or exchange offer. If a Portfolio desires to take
action with respect to any tender offer, exchange offer or any other similar
transaction, the Portfolio will notify the Custodian of such desired action at
least three business days prior to the time such action must be taken under
the terms of the tender, exchange offer, or other similar transaction, and it
will be the responsibility of the Custodian to timely transmit to the
appropriate person(s) the Portfolio's notice. Where the Portfolio does not
notify the Custodian of its desired action within the three business day
period, the Custodian will use its best efforts to timely transmit the
Portfolio's notice to the appropriate person.

2.15 Reports to Fund by independent Public Accountants. At the request of the
Fund, the Custodian will provide the Fund, for the benefit of each of its
Portfolios, with audited annual reports. The Custodian will further provide
the Fund, at such times as the Fund may reasonably require, with reports by
independent public accountants on the accounting system, internal accounting
control and procedures for safeguarding securities, futures contracts and
options on futures contracts, including securities deposited and/or maintained
in a Securities System, relating to the services provided by the Custodian
under this Contract. Such reports will be of sufficient scope and in
sufficient detail, as may reasonably be required by the Fund to provide
reasonable assurance that any material inadequacies existing or arising since
the prior examination would be disclosed by such examination. The reports must
describe any material inadequacies disclosed and, if there are no such
inadequacies, the reports will so state.

Payments for Redemptions of Shares of a Portfolio

From such funds as may be available for the purpose but subject to the
limitations of the Governing Documents of the Fund and any applicable votes of
the Board of Trustees of the Fund pursuant to those Documents, the Custodian
will, upon receipt of instructions from the Transfer Agent, make funds
available for payment to holders of shares who have delivered to the Transfer
Agent a request for redemption of their shares. In connection with the
redemption of shares of a Portfolio, the Custodian is authorized upon receipt
of instructions from the Transfer Agent to wire funds to or through a
commercial bank designated by the redeeming shareholder.

The Custodian will receive payments for a Portfolio's shares issued or sold
from the distributor for the Portfolio's shares or from the Transfer Agent of
the Portfolio and deposit as received into the Portfolio's account such
payments as are received for shares of the Portfolio issued or sold from time
to time by the Portfolio. The Custodian will provide timely notification to
the Portfolio and the Transfer Agent of any receipt by it of payments for
shares of the Portfolio.

4. Proper Instructions

"Proper Instructions" means a writing signed or initialed by one or more
persons authorized by the Board of Trustees. Each such writing must set forth
the specific transaction or type of transaction involved, including a
statement of the purpose for which such action is requested, and may be a
blanket instruction authorizing specific transactions of a routine nature or
occurring repeatedly. Oral instructions will be considered Proper Instructions
if the Custodian reasonably believes them to have been given by a person
authorized to give such instructions with respect to the transaction involved.
The Fund will cause all oral instructions to be confirmed in writing. Upon
receipt of a certificate of the Secretary or an Assistant Secretary as to the
authorization by the Board of Trustees of the Fund, accompanied by a detailed
description of procedures approved by the Board of Trustees, Proper
Instructions may include communications effected directly between
electromechanical or electronic devices provided that the Board of Trustees
and the Custodian are satisfied that such procedures afford adequate
safeguards for the Fund's assets.

5. Actions Permitted without Express Authority

In its discretion the Custodian may, without express authority from the Fund:

1) surrender securities in temporary form for securities in definitive form;

2) endorse for collection, in the name of a Portfolio, checks, drafts and
other negotiable instruments on the same day as received: and

3) in general, attend to all nondiscretionary details in connection with the
sale, exchange, substitution, purchase, transfer and other dealings with the
securities and property of a Portfolio except as otherwise directed by the
Board of Trustees of the Fund.

6. Evidence of Authority, Reliance on Documents

The Custodian will not be liable for actions taken pursuant to instructions,
notice, request, consent, certificate or other instrument or paper reasonably
and in good faith believed by it to be genuine and to have been properly
executed by or on behalf of the Fund or a Portfolio in accordance with Proper
Instructions as defined in Section 4 of this Agreement. The Custodian may
receive and accept a certified copy of a vote of the Board of Trustees of the
Fund as conclusive evidence (a) of the authority of any person to act in
accordance with such vote or (b) of any determination or of any action by the
Board of Trustees pursuant to the Governing Documents of the Fund as described
in such vote, and such vote may be considered as in full force and effect
until receipt by the Custodian of written notice to the contrary. So long as
and to the extent that it is in the exercise of the standard of care set forth
in Section 10 of this Agreement, the Custodian will not be responsible for the
title, validity or genuineness of any property or evidence of title received
by it or delivered by it pursuant to this Agreement and will be held harmless
in acting upon any notice, request, consent, certificate or other instrument
reasonably believed by it to be genuine and to be signed by the proper party
or parties.

7. Records, Inventory

The Custodian will create and maintain all records relating to its activities
and obligations under this Agreement in such manner as will meet the
obligations of the Fund under the Investment Company Act of 1940, with
particular attention to Section 31 and Rules 31a-1 and 31a-2 thereunder. All
such records will be the property of the Fund and will at all times during the
regular business hours of the Custodian be open for inspection and audit by
duly authorized officers, employees or agents of the Fund and employees and
agents of the Securities and Exchange Commission, and, in the event of
termination of this Agreement, will be delivered in accordance with Section 12
of this Agreement. The Custodian will, at the Fund's request, supply the Fund
with a tabulation of securities owned by any Portfolio and held by the
Custodian and will, when requested to do so by the Fund and for such
compensation as is agreed on by the Portfolio and the Custodian, include
certificate numbers in such tabulations. The Custodian will conduct a periodic
inventory of all securities and other property subject to this Agreement and
provide to the Fund a periodic reconciliation of the vaulted position of each
Portfolio to the appraised position of the Portfolio. The Custodian will
promptly report to the Fund the results of the reconciliation, indicating any
shortages or discrepancies uncovered thereby, and take appropriate action to
remedy any such shortages or discrepancies.

8. Opinion of the Fund's Independent Accountant

The Custodian will cooperate with the Fund's independent public accountants in
connection with the annual and other audits of the books and records of the
Fund and take all reasonable action, as the Fund may from time to time
request, to provide the necessary information to such accountants for the
expression of their opinion without any qualification as to the scope of their
examination, including but not limited to, any opinion in connection with the
preparation of the Fund's Form N-1A, and Form N-SAR or other reports to the
Securities and Exchange Commission or state regulatory agency and with respect
to any other legal requirements.

9. Compensation of Custodian

The Custodian will be entitled to reasonable compensation for its services and
expenses as Custodian, as detailed in the attached Addendum.

10. Responsibility of Custodian - Indemnification

Reasonable Care - Notwithstanding anything to the contrary in this Agreement,
the Custodian will be held to the exercise of reasonable care in carrying out
the provisions of this Agreement, but will be kept indemnified by and will be
without liability to the Fund for any action taken or omitted by it in good
faith without negligence.

Notice to Fund - in order for the indemnification provision contained in this
Section to apply, it is understood that if in any case the Fund may be asked
to indemnify or hold the Custodian harmless, the Fund will be fully and
promptly advised of all pertinent facts concerning the situation in question,
and it is further understood that the Custodian will use all reasonable care
to identify and notify the Fund promptly concerning any situation which
presents or appears likely to present the probability of such a claim for
indemnification against the Fund.

Defense of Custodian - The Fund will have the option to defend the Custodian
against any claim which may he the subject of this indemnification, and in the
event that the Fund so elects, it will so notify the Custodian, and thereupon
the Fund will take over complete defense of the claim and the Custodian will
in such situation initiate no further legal or other expenses for which it
will seek indemnification under this Section. The Custodian will in no case
confess any claim or make any compromise in any case in which the Fund will be
asked to indemnify the Custodian except with the Fund's prior written consent.
Nothing in this Section will be construed to limit any right or cause of
action on the part of the Custodian under this Agreement which is independent
of any right or cause of action on the part of the Fund. The Custodian will be
entitled to rely on and may act upon advice of counsel (who may be counsel for
the Fund or such other counsel as may be agreed to by the parties) on all
matters, and will be without liability for any action reasonably taken or
omitted pursuant to such advice.

If the Fund requires the Custodian to take any action with respect to
securities that involves the payment of money, or that may, in the opinion of
the Custodian, result in the Custodian or its nominee assigned to the Fund
being liable for the payment of money or incurring liability of some other
form, the Fund, as a prerequisite to requiring the Custodian to take such
action, will indemnify the Custodian in an amount and form satisfactory to it.

If a Portfolio requires the Custodian to advance cash or securities for any
purpose or in the event that the Custodian or its nominee incurs or is
assessed any taxes, charges, expenses, assessments, claims or liabilities in
connection with the performance of this Agreement, except as may arise from
the Custodian's or its agent's negligent action or omission, or willful
misconduct, any property held for the account of the Portfolio will serve as
security. If the Portfolio fails to repay the Custodian promptly, the
Custodian will be entitled to use available cash and to dispose of the
Portfolio's assets to the extent necessary for reimbursement. If the Custodian
exercises this option, it must give the Portfolio reasonable notice so as to
enable the Portfolio to repay the cash or securities advanced. Such notice
will not preclude the Custodian from asserting any lien under this provision.

11. Effective Period, Termination and Amendment

This Agreement will become effective as of its execution, provided that the
Custodian will have received proof of initial approval of a particular
Securities System pursuant to Rule 17f-4 under the Investment Company Act of
1940 (see Section 2.9 of this Agreement) or of the Direct Paper System (see
Section 2.10 of this Agreement). The Portfolio will provide proof of annual
approval to the Custodian. This Agreement will continue in force until
terminated as provided in this Section. It may be amended at any time by
mutual agreement of the parties, and may be terminated by either party with 60
days written notice. The Fund may, by action of the Fund's Board of Trustees,
immediately terminate this Agreement in the event of the appointment of a
conservator or receiver for the Custodian by the Comptroller of the Currency
or a like event at the direction of an appropriate regulatory agency or court
of competent jurisdiction.

In the event the Agreement terminates, the Fund will pay the Custodian
whatever compensation is due as of the date of the termination, and will
reimburse the Custodian for costs, expenses and disbursements incurred in
connection with termination, but only to the extent the Fund gives prior
approval for the expenditures. Approval will not be unreasonably withheld.

12. Successor Custodian

If a successor Custodian is appointed by the Board of Trustees of the Fund,
the Custodian will, upon termination, deliver to the successor custodian at
the office of the Custodian, duly endorsed and in the form for transfer, all
securities, funds and other properties then held by it pursuant to this
Agreement, and will transfer to an account of the successor custodian all of
each Portfolio's securities held in a Securities System. The Custodian will
cooperate in assisting the successor Custodian so that it may continue any
subcustodian agreement entered into by the Custodian and any subcustodian on
behalf of the Fund.

If no successor is to be appointed, the Custodian will make the securities,
funds and other properties available as above to the Fund upon receipt of a
certified copy of a vote of the Board of Trustees of the Fund.

If no written order designating a successor Custodian or certified copy of a
vote of the Board of Trustees is delivered to the Custodian on or before the
effective date of the termination, the Custodian will have the right to make
delivery to a bank (as defined in the Investment Company Act of 1940) or trust
company of its own selection having aggregate capital, surplus, and undivided
profits, as shown by its last published report, of not less than $50,000,000,
which will become the successor custodian under this Agreement.

In the event the securities, funds and other properties remain in the
possession of the Custodian after the termination date due to failure by the
Fund to procure the certified copy of the appropriate vote of the Board of
Trustees, the Custodian will be entitled to fair compensation for its services
during the period during which it retains possession of the property, and the
provisions of this Agreement relating to the duties and obligations of the
Custodian will remain in full force.

If during the term of this Agreement any Portfolio is liquidated pursuant to
law, the Custodian will distribute the remaining assets of the Portfolio after
satisfying all expenses and liabilities of that Portfolio. Such distributions
will be pro rata among the Portfolio's shareholders as certified by the
Transfer Agent, and will be in cash or, if the Portfolio so orders, in
portfolio securities. Section 10 (Responsibility of Custodian -
Indemnification) will survive any termination of this Agreement.

13. Interpretive and Additional Provisions

In connection with the operation of this Agreement, the Custodian and the Fund
may from time to time agree on such provisions interpretive of or in addition
to the provisions of this Agreement as may in their joint opinion be
consistent with the general tenor of this Agreement. Any such interpretive or
additional provisions will be in a writing signed by both parties and will be
annexed to this Agreement. No interpretive or additional provisions will
contravene any applicable federal or state regulations or any provision of the
Governing Documents of the Fund, nor will they be deemed amendments to this
Agreement.

14. Notice

Notice will be considered sufficient if sent by registered or certified mail,
or by such other means as the parties agree, to the other party at the address
set forth above or at any other address specified in writing and delivered to
the other party.

15. Bond

The Custodian will, at all times, maintain a bond issued by a reputable
fidelity insurance company authorized to do business in the place where the
bond is issued. The bond will be issued against larceny and embezzlement, and
will cover each officer and employee of the Custodian who may, singly or
jointly with others, have access to securities or funds of the Fund, either
directly or through authority to receive and carry out any certificate
instruction, order request, note or other instrument required or permitted by
this Agreement. The Custodian agrees that it will not cancel, terminate or
modify the bond so as to affect adversely the Fund, except after written
notice to the Fund not less than 10 days prior to the effective date of such
cancellation, termination or modification. At the request of the Fund, the
Custodian will furnish to the Fund a copy of each such bond and each amendment
thereto.

16. Confidentiality

The Custodian agrees to treat all records and other information relative to
the Portfolios and their prior, present or future shareholders as
confidential, and the Custodian, on behalf of itself and its employees, agrees
to keep confidential all such information except when requested to divulge
such information by duly constituted authorities, or when so requested by the
Fund. If requested to divulge confidential information to anyone other than
persons normally authorized by the Fund to receive information, such as the
Fund's auditors or attorneys, the Custodian will not release the information
until it notifies the Fund in writing and receives approval in writing from
the Fund, unless required by law to do otherwise. Approval by the Fund will
not be unreasonably withheld and may not be withheld where the Custodian may
be exposed to civil or criminal contempt proceedings for failure to comply.

17. Exemption from Liens

Except as provided in Section 10 of this Agreement, the securities and other
assets held by the Custodian for a Portfolio will be subject to no lien or
charge of any kind in favor of the Custodian or any person claiming through
the Custodian. but nothing herein will be deemed to deprive the Custodian of
its right to invoke any and all remedies available at law or equity to collect
amounts due it under this Agreement. Neither the Custodian nor any
subcustodian appointed pursuant to Section 1 of this Agreement will have any
power or authority to assign, hypothecate, pledge or otherwise dispose of any
securities held by it for the Portfolio, except upon the direction of the
Fund, duly given as herein provided, and only for the account of the Portfolio.

18. Massachusetts Law to Apply

This Agreement will be construed and the provisions thereof interpreted under
and in accordance with laws of the Commonwealth of Massachusetts.

19. Governing Documents

The term "Governing Documents" refers to the Fund's Articles of Incorporation,
Bylaws and Registration Statement filed under the Securities Act of 1933, as
amended from time to time.

20. Trustees and Shareholders

Neither the holders of shares in the Portfolios nor any Trustees of the Fund
will be personally liable under this Agreement.

21. Massachusetts Business Trust

With respect to the Fund, which is a party to this Agreement any which is
organized as a business trust under the laws of the Commonwealth of
Massachusetts, the term Fund means and refers to the trustees serving under
the applicable incorporation document. It is expressly agreed that the
obligations of the Fund under this Agreement will not be binding on any of the
trustees, Portfolio shareholders, nominees, officers, agents or employees of
the Fund personally, but bind only the property of the Fund's Portfolios.

22. Successors of Parties

This Contract will he binding on and will inure to the benefit of the Fund and
the Custodian and their respective successors.

23. Integration Clause

The parties agree that all aspects of their agreement are contained in this
document, its Addendum, supplemental agreements and all amendments thereto,
and that any disputes arising in connection with this Agreement will be
decided with reference to those documents.


IN WITNESS WHEREOF, each of the parties has caused this instrument to be
executed in its name and behalf by its duly authorized representative and its
seal to be affixed hereunder as of the dates indicated below.

CALVERT SOCIAL INVESTMENT
FUND

CALVERT SOCIAL INVESTMENT FUND

By: /s/  Date: 5/12/92
         William M. Tartikoff

Attest: /s/       Date: 5/12/92
         Shirley A. Peoples

STATE STREET BANK AND TRUST COMPANY

By: /s/  Date: 5/15/92
         Ronald E. Logue, Senior Vice President

Attest: /s/       Date: 5/15/92
         Claire E. Rodowicz, Assistant Secretary

<PAGE>


                    LETTER AGREEMENT BETWEEN CALVERT SOCIAL
                INVESTMENT FUND AND STATE STREET BANK AND TRUST
                 COMPANY SUPPLEMENTING THE CUSTODIAN AGREEMENT
                           DATED AS OF MARCH 5, 1992

                  The following items supplement the Custodian Agreement
("Agreement") dated March 5, 1992, and are considered part of the Agreement:

1.       The initial Addendum to the Agreement, dated as of March 5, 1992,
will remain in effect for a minimum of three years; that is, until at least
March 5, 1995, unless mutually agreed by the parties.

2.       The Fund is entitled to pay fees to the Custodian by analysis on
collected funds, which will earn the rate stated in the Addendum to the
Agreement.

                  IN WITNESS WHEREOF, each of the parties has caused this
instrument to be executed in its name and behalf by its duly authorized
representative and its seal to he affixed hereunder as of the dates indicated
below.

CALVERT SOCIAL INVESTMENT FUND

By: /s/  Date: 5/12/92
         William M. Tartikoff

Attest: /s/       Date: 5/12/92
         Shirley A. Peoples

STATE STREET BANK AND TRUST COMPANY

By: /s/  Date: 5/15/92
         Ronald E. Logue, Senior Vice President

Attest: /s/       Date: 5/15/92
         Claire E. Rodowicz, Assistant Secretary


<PAGE>


APPENDIX A

                  The following Portfolios are covered by the Custodian
Agreement between Calvert Social investment Fund and State Street Bank and
Trust Company:

MONEY MARKET PORTFOLIO
MANAGED GROWTH PORTFOLIO
BOND PORTFOLIO
EQUITY PORTFOLIO


<PAGE>


ADDENDUM TO CUSTODIAN AGREEMENT

The Fund will pay the following fees to State Street Bank and Trust Company
pursuant to the Custodian Agreement dated as of March 5, 1992. The rates,
which may be adjusted annually according to the Consumer Price Index (CPI),
will remain in effect until March 31, 1995, or for three years from the
commencement of services by the Custodian.

1.       Administration - Three levels of service are listed below. Specific
services are outlined in the proposal. Each service includes maintenance of
one demand deposit per account per portfolio. All fees will be billed monthly
and payable quarterly.

A.       Custody Service
B.       Custody, Portfolio and Fund Accounting Service
C.       Custody and Remote Service

Annual Charges
                                            B. Custody,
                                            Portfolio
Portfolio                                   and Fund          C. Custody &
Assets                     A. Custody       Accounting        Remote Service

less than $25 million      $500             $40,000               $6,000
$25 - 1OO MM               $2,000           $40,000               $7,500
more than $100 MM          $3,500           $40,000               $9,000

Annual Horizon Base Charge                                        $25,000

2.       Portfolio Trades - There will be a charge for each of the following
line items processed:

State Street Bank Repos                                           $7.00
DTC or Fed Book Entry                                             $12.00
New York Physical Settlements                                     $25.00
Maturity Collections                                              $8.00
PTC Purchase, Sale, Deposit or Withdrawal                         $20.00
Internal Transfers                                                $8.00
All other trades                                                  $16.00

3.       Options - The following charges will apply per issue and per broker:

Option charge for each option written or closing contract price   $25.00
Option expiration charge                                          $15.00
Option exercised charge                                           $15.00

4.       Lending of Securities

Deliver loaned securities versus cash collateral                  $20.00
Deliver loaned securities versus securities collateral            $30.00
Receive/deliver additional cash collateral                        $6.00
Substitutions of securities collateral                            $30.00
Deliver cash collateral versus receipt of loaned securities       $15.00
Deliver securities collateral versus receipt of loaned securities $25.00
Loan administration - mark - to - market per day, per loan        $3.00

5.       Interest Rate Futures

Transactions - no security movement                               $8.00

6.       Holdings Charge

For each issue maintained - monthly charge                        $5.00

7.       Principal Reduction Payments

Per paydown                                                       $10.00

8.       Dividend Charges

For items held at the request of traders over record date
          in street form                                          $50.00

9.       Global Custody

Group l           Group 2           Group 3          Group 4
Austria           Australia         Denmark          Mexico
Canada            Belgium           Finland          Portugal
Euroclear         Netherlands       France           Spain
Germany           New Zealand       Italy            Sweden
Hong Kong         Norway            Malaysia
Japan             Singapore         Thailand
                  Switzerland       United Kingdom

A.       Net Assets (fees indicated in basis points)

                           Group l      Group 2      Group 3      Group 4
First $50 Million          12           15           18           25
Next $50 Million           10           13           16           25
Over $100 Million          8            11           14           25

B.       Transaction Charge

                           Group l      Group 2      Group 3      Group 4
                           $30          $45          $60          $75


10.      Special Services - Fees for activities of a nonrecurring nature, such
as fund consolidations or reorganizations, extraordinary security shipments
and the preparation of special reports, will be subject to negotiation. Fees
for automated pricing, yield calculation and other special items will be
negotiated separately.

11.      Balance Credit - Balance credits for all funds will be applied
against the foregoing fees based on the 13 week Treasury bill bond equivalent
adjusted by the current federal reserve and FDIC insurance requirements. The
rate in effect at each prior month end will be used, adjusted to a monthly
basis, times the average collected balance in the demand deposit accounts.

12.      Out-of-Pocket Expenses - Billing for recovery of out-of-pocket
expenses will be made as of the end of each month, and will be payable
quarterly. Where a dollar amount is indicated below, the fee that may be
charged to the Fund is limited as noted. Out-of-pocket expenses include, but
are not limited to:

Wire charges ($4.75)
Telephone/Line Charges
Postage and Insurance
Courier Service
Duplicating
Legal Fees
Supplies Related to Fund Records
Rush Transfer ($8.00)
Transfer Fees
Subcustodian Charges
Audit Letter
Federal Reserve Fee for Return Cheek items Over $2,500 ($4.25)
GNMA Transfer ($15.00)
PTC Deposit/Withdrawal for same-day turnaround ($50.00)
Overdrafts (Prime Rate)

13.      Demand Deposit Services - [Note: Demand Deposit Account Services are
charged for accounts other than the portfolio custody account(s)]

Account Maintenance                                    $12.00
Statements (Duplicate and Additional)                  $4.00
Check(s) Paid                                          $0.18
Deposit Ticket Processed                               $0.85
Deposit item Based
     Commercial Encoded                                varies
     Commercial Unencoded                              $0.10
Return Deposited Item (Commercial)                     $3.00
* Redeposit of Item
     Per Deposit                                       $1.00
     Per Item                                          $0.50
Pay/Return Checks Against Zero, NFS or UNC Funds       $15.00
Check Certification                                    $7.00
Stop Payment Order (Manual)                            $15.00
Wire Transfer Out                                      $4.75
Wire Transfer In                                       $4.75
Photo Requests Adjustments                             $5.00
Auditors Confirmations                                 $25.00
** FDIC                                                $0.195/$100/yr.
Treasurers Checks                                      $7.00
Money Orders                                           $2.50
Counter Checks                                         $1.50

* In addition to the charges for Redeposit of item, an adjustment to the daily
float calculation will be assessed.

** The rate utilized for FDIC compensation will reflect that which is charged
by the agency for the applicable period.

15.      Cash Management

Automated Wires (via Terminal) - Per log-on            $2.00

Automated Wires (CPU to CPU) - Monthly Fees; Set-up (one-time charge)
Installation                                           $2,500.00
Modems (2)                                             $3,000.00
Encryption (2)                                         $5,200.00

Outgoing wires will be charged as noted in Demand Deposit Section

Automated Clearing House (ACH) Processing
Per Tape                                               $15.00
Per item                                               $0.06

Controlled Disbursement
Monthly Funding and Reporting                          $125.00
Per Check Paid                                         $0.08

Balance Reporting (SSCAN)
Annual-Base (Per Client)                               $1,000.00
Per Account, Per Report                                $50.00
         ("Report" daily, 1,000 transactions/month)
Intraday Report, per account                           $200.00

Reconcilement Services (Partial)
Monthly Maintenance                                    $100.00
Per item                                               $0.06
Monthly Minimum                                        $140.00
Full - Electronic input
Monthly Maintenance.                                   $145.00
Per hem                                                $0.06
Monthly Minimum                                        $205.00

Additional Reconcilement Services
On-line inquiry
     3 Month Storage, Per item                         $0.01
     6 Month Storage, Per item                         $0.02
On-line Photo Request, Per item                        $1.00
On-line Stop Payment, Per item                         $6.00
Microfilm of Check, Per item                           $0.02
Check Redemption, Per item                             $0.02

                   IN WITNESS WHEREOF, each of the parties has caused this
instrument to be executed in its name and behalf by its duly authorized
representative and its seal to be affixed hereunder as of the dates indicated
below.

CALVERT SOCIAL INVESTMENT FUND

BY: /s/
     William. M. Tartikoff

STATE STREET BANK AND TRUST COMPANY

BY: /s/
     J. W. Fletcher

<PAGE>

AMENDMENT TO THE CUSTODIAN CONTRACT

AGREEMENT made by and between State Street Bank and Trust Company (the
"Custodian") and Calvert Social Investment Fund (the "Fund").

WHEREAS, the Custodian and the Fund are parties to a custodian contract dated
(the "Custodian Contract") governing the terms and conditions under which the
Custodian maintains custody of the securities and other assets of the Fund; and

WHEREAS, the Custodian and the Fund desire to amend the Custodian Contract to
provide for the maintenance of the Fund's foreign securities, and cash
incidental to transactions in such securities, in the custody of certain
foreign banking institutions and foreign securities depositories acting as
subcustodians in conformity with the requirements of Rule 1 7f-5 under the
Investment Company Act of 1940;

NOW THEREFORE, in consideration of the promises and covenants contained
herein, the Custodian and the Fund hereby amend the Custodian Contract by the
addition of the following terms and conditions:

1.       Appointment of Foreign Subcustodians.

The Fund hereby authorizes and instructs the Custodian to employ as
subcustodians for the Fund's securities and other assets maintained outside
the United States the foreign banking institutions and foreign securities
depositories designated on Schedule A hereto ("foreign subcustodians"). Upon
receipt of "Proper Instructions", as defined in Article 4 of the Custodian
Contract together with a certified resolution of the Fund's Board of Trustees,
the Custodian and the Fund may agree to amend Schedule A hereto from time to
time to designate additional foreign banking institutions and foreign
securities depositories to act as subcustodian. Upon receipt of Proper
Instructions, the Fund may instruct the Custodian to cease the employment of
any one or more such subcustodians for maintaining custody of the Fund's
assets.


2.       Assets to be Held.

The Custodian shall limit the securities and other assets maintained in the
custody of the foreign subcustodians to: (a) "foreign securities", as defined
in paragraph (c)(l) of Rule 17f-5 under the Investment Company Act of 1940,
and (b) cash and cash equivalents in such amounts as the Custodian or the Fund
may determine to be reasonably necessary to effect the Fund's foreign
securities transactions. The Custodian shall identify on its books as
belonging to the Fund, the foreign securities of the Fund held by each foreign
subcustodian.

3.       Foreign Securities Depositories.

Except as may otherwise be agreed upon in writing by the Custodian and the
Fund, assets of the Funds shall be maintained in foreign securities
depositories only through arrangements implemented by the foreign banking
institutions serving as subcustodians pursuant to the terms hereof. Where
possible, such arrangements shall include entry into agreements containing the
provisions set forth in Section 5 hereof.

4.       Holding Securities.

The Custodian may hold securities and other non-cash property for all of its
customers, including the Fund, with a foreign subcustodian in a single account
that is identified as belonging to the Custodian for the benefit of its
customers, provided however, that (i) the records of the Custodian with
respect to securities and other non-cash properly of the Fund which are
maintained in such account shall identify by book-entry those securities and
other non-cash property belonging to the Fund and (ii) the Custodian shall
require that securities and other non-cash properly so held by the foreign
subcustodian be held separately from any assets of the foreign subcustodian or
of others.

5.       Agreements with Foreign Banking Institutions.

Each agreement with a foreign banking institution shall provide that: (a) the
Fund's assets will not be subject to any right, charge, security interest,
lien or claim of any kind in favor of the foreign banking institution or its
creditors or agent, except a claim of payment for their safe custody or
administration; (b) beneficial ownership of the Fund's assets will be freely
transferable without the payment of money or value other than for custody or
administration; (c) adequate records will be maintained by the Custodian
identifying the assets as belonging to the Fund; (d) officers of or auditors
employed by, or other representatives of the Custodian, including to the
extent promised under applicable law the independent public accountants for
the Fund, will be given access to the books and records of the foreign banking
institution relating to its actions under its agreement with the Custodian;
and (e) assets of the Fund held by the foreign subcustodian will be subject
only to the instructions of the Custodian or its agents.

6.       Access of Independent Accountants of the Fund.

Upon request of the Fund, the Custodian will use its best efforts to arrange
for the independent accountants of the Fund to be afforded access to the books
and records of any foreign banking institution employed as a foreign
subcustodian insofar as such books and records relate to the performance of
such foreign banking institution under its agreement with the Custodian.

7.       Reports by Custodian.

The Custodian will supply to the Fund from time to time, as mutually agreed
upon, statements in respect of the securities and other assets of the Fund
held by foreign subcustodians, including but not limited to an identification
of entities having possession of the Fund's securities and other assets and
advices or notifications of any transfers of securities to or from each
custodial account maintained by a foreign banking institution for the
Custodian on behalf of its customers indicating, as to securities acquired for
the Fund, the identity of the entity having physical possession of such
securities.

8.       Transactions in Foreign Custody Account.

(a) Except as otherwise provided in paragraph (b) of this Section 8, the
provision of Sections 2.2 and 2.7 of the Custodian Contract shall apply,
mutatis mutandis to the foreign securities of the Fund held outside the United
States by foreign subcustodians.

(b) Notwithstanding any provision of the Custodian Contract to the contrary,
settlement and payment for securities received for the account of the Fund and
delivery of securities maintained for the account of the Fund may be effected
in accordance with the customary established securities trading or securities
processing practices and procedures in the jurisdiction or market in which the
transaction occurs, including, without limitation, delivering securities to
the purchaser thereof or to a dealer therefor (or an agent for such purchaser
or dealer) against a receipt with the expectation of receiving later payment
for such securities from such purchaser or dealer.

(c) Securities maintained in the custody of a foreign subcustodian may be
maintained in the name of such entity's nominee to the same extent as set
forth in Section 2.3 of the Custodian Contract and the Fund agrees to hold any
such nominee harmless from any liability as a holder of record of such
securities.

9.       Liability of Foreign Subcustodians.

Each agreement pursuant to which the Custodian employs a foreign banking
institution as a foreign subcustodian shall require the institution to
exercise reasonable care in the performance of its duties and to indemnify,
and hold harmless, the Custodian and the Fund from and against any loss,
damage, cost, expense, liability or claim arising out of or in connection with
the institution's performance of such obligations. At the election of the
Fund, it shall be entitled to be subrogated to the rights of the Custodian
with respect to any claims against a foreign banking institution as a
consequence of any such loss, damage, cost expense, liability or claim if and
to the extent that the Fund has not been made whole for any such loss, damage,
cost, expense, liability or claim.

10.      Liability of Custodian.

The Custodian shall be liable for the acts or omissions of a foreign banking
institution to the same extent as set forth with respect to subcustodians
generally in the Custodian Contract and, regardless of whether assets are
maintained in the custody of a foreign banking institution, a foreign
securities depository or a branch of a U.S. bank as contemplated by paragraph
13 hereof, the Custodian shall not be liable for any loss, damage, cost,
expense, liability or claim resulting from nationalization, expropriation,
currency restrictions, or acts of war or terrorism or any loss where the
subcustodian has otherwise exercised reasonable care. Notwithstanding the
foregoing provisions of this paragraph 10, in delegating custody duties to
State Street London Ltd., the Custodian shall not be relieved of any
responsibility to the Fund for any loss due to such delegation, except such
loss as may result from (a) political risk (including, but not limited to,
exchange control restrictions, confiscation, expropriation, nationalization,
insurrection, civil strife or armed hostilities) or (b) other losses
(excluding a bankruptcy or insolvency of State Street London Ltd. not caused
by political risk) due to Acts of God, nuclear incident or other losses under
circumstances where the Custodian and State Street London Ltd. have exercised
reasonable care.

11.      Reimbursement for Advances.

If the Fund requires the Custodian to advance cash or securities for any
purpose including the purchase or sale of foreign exchange or of contracts for
foreign exchange, or in the event that the Custodian or its nominee shall
incur or be assessed any taxes, charges, expenses, assessments, claims or
liabilities in connection with the performance of this Contract except such as
may arise from its or its nominee's own negligent action, negligent failure to
act or willful misconduct any property at any time held for the account of the
Fund shall be security therefor and should the Fund fail to repay the
Custodian promptly, the Custodian shall be entitled to utilize available cash
and to dispose of such Fund assets to the extent necessary to obtain
reimbursement.

12.      Monitoring Responsibilities.

The Custodian shall furnish annually to the Fund, during the month of June,
information concerning the foreign subcustodians employed by the Custodian.
Such information shaft be similar in kind and scope to that furnished to the
Fund :a connection with the initial approval of the Custodian Contract. In
addition, the Custodian will promptly inform the Fund in the event that the
Custodian learns of a material adverse change in the financial condition of a
foreign subcustodian or any material loss of the assets of the Fund or in the
case of any foreign subcustodian not the subject of an exemptive order from
the Securities and Exchange Commission is notified by such foreign
subcustodian that there appears to be a substantial likelihood that its
shareholders' equity will decline below $200 million (U.S. dollars or the
equivalent thereof) or that its shareholders' equity has declined below $200
million (in each case computed in accordance with generally accepted U.S.
accounting principles).

13.      Branches of U.S. Banks.

(a) Except as otherwise set forth in this amendment to the Custodian Contract,
the provisions hereof shall not apply where the custody of the Funds assets is
maintained in a foreign branch of a banking institution which is a "bank" s
defined by Section 2(a)(5) of the Investment Company Act of 1940 meeting the
qualification set forth in Section 26(a) of said Act. The appointment of any
such branch s a subcustodian shall be governed by paragraph 1 of the Custodian
Contract.

(b) Cash held for the Fund in the United Kingdom shall be maintained in an
interest bearing account established for the Fund with the Custodian's London
branch, which account shall be subject to the direction of the Custodian,
State Street London Ltd. or both.

14.      (Deleted paragraph per mutual consent.)

15.      Responsibility of Custodian.

There is added to Article 10 of the Custodian Contract the following paragraph:

Except as may arise from the Custodian's own negligence or willful misconduct
or the negligence or willful misconduct of a subcustodian or agent, the
Custodian shall be without liability to the Fund for any loss, liability,
claim or expense resulting from or caused by; (i) events or circumstances
beyond the reasonable control of the Custodian or any subcustodian or
Securities System or any agent or nominee of any of the foregoing, including,
without limitation, nationalization or expropriation, imposition of currency
controls or restrictions, the interruption, suspension or restriction of
trading on or the closure of any securities market power or other mechanical
or technological failures or interruptions, computer viruses or communications
disruptions, acts of war or terrorism, riots, revolutions, work stoppages,
natural disasters or other similar events or acts; (ii) errors by the Fund or
the Investment Advisor in their instructions to the Custodian provided such
instructions have been in accordance with this Contract; (iii) the insolvency
of or acts or omissions by a Securities System; (iv) any delay or failure of
any broker, agent or intermediary, central bank or other commercially
prevalent payment or clearing system to deliver to the Custodian's
subcustodian or agent securities purchased or in the remittance or payment
made in connection with securities sold; (v) any delay or failure of any
company, corporation, or other body in charge of registering or transferring
securities in the name of the Custodian, the Fund, the Custodian's
subcustodians, nominees or agents or any consequential losses arising out of
such delay or failure to transfer such securities including non-receipt of
bonus, dividends and rights and other accretions or benefits; (vi) delays or
inability to perform its duties due to any disorder in market infrastructure
with respect to any particular security or Securities System; and (vii) any
provision of any present or future law or regulation or order of the. United
States of America, or any state thereof, or any other country, or political
subdivision thereof or of any court of competent jurisdiction.

16.      Applicability of Custodian Contract.

Except as specifically superseded or modified herein, the terms and provisions
of the Custodian Contract shall continue to apply with full force and effect.


IN WITNESS WHEREOF, each of the parties has caused this instrument to be
executed in its name and behalf by its duly authorized representative and its
seal to be hereunder affixed as of the 9th day of September, 1996.

CALVERT SOCIAL INVESTMENT FUND

By: /s/
         William M. Tartikoff

Attest: /s/
         Susan Walker Bender

STATE STREET BANK AND TRUST COMPANY

By: /s/
         Ronald E. Logue, Executive Vice President

Attest: /s/
         Francine Hayes


<PAGE>

Schedule A

The following foreign banking institutions foreign securities depositories
have been approved by the Board of Trustees of Calvert Social Investment Fund
for use as subcustodians for the Fund's securities and other assets:

(Insert banks and securities depositories)
(See Board books)


Certified:
/s/
Susan Walker Bender
Fund's Authorized Officer

Date: 9/9/96





<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000356682
<NAME> CALVERT SOCIAL INVESTMENT FUND
<SERIES>
   <NUMBER> 145
   <NAME> MANAGED GROWTH PORTFOLIO, CLASS C
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          SEP-30-1997
<PERIOD-START>                             APR-01-1997
<PERIOD-END>                               SEP-30-1997
<INVESTMENTS-AT-COST>                           575827
<INVESTMENTS-AT-VALUE>                          681286
<RECEIVABLES>                                     6778
<ASSETS-OTHER>                                     574
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  688638
<PAYABLE-FOR-SECURITIES>                          3387
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         1048
<TOTAL-LIABILITIES>                               4435
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                          7707
<SHARES-COMMON-STOCK>                              258
<SHARES-COMMON-PRIOR>                              216
<ACCUMULATED-NII-CURRENT>                         (28)
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                            513
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                           705
<NET-ASSETS>                                      8897
<DIVIDEND-INCOME>                                   41
<INTEREST-INCOME>                                  246
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                     177
<NET-INVESTMENT-INCOME>                            110
<REALIZED-GAINS-CURRENT>                           968
<APPREC-INCREASE-CURRENT>                          383
<NET-CHANGE-FROM-OPS>                             1461
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                        (108)
<DISTRIBUTIONS-OF-GAINS>                         (484)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                           3006
<NUMBER-OF-SHARES-REDEEMED>                     (2299)
<SHARES-REINVESTED>                                577
<NET-CHANGE-IN-ASSETS>                            2153
<ACCUMULATED-NII-PRIOR>                           (31)
<ACCUMULATED-GAINS-PRIOR>                           30
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                               46
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    178
<AVERAGE-NET-ASSETS>                              7787
<PER-SHARE-NAV-BEGIN>                            31.05
<PER-SHARE-NII>                                   0.47
<PER-SHARE-GAIN-APPREC>                           5.54
<PER-SHARE-DIVIDEND>                            (0.44)
<PER-SHARE-DISTRIBUTIONS>                       (2.10)
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              34.52
<EXPENSE-RATIO>                                   2.27
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000356682
<NAME> CALVERT SOCIAL INVESTMENT FUND
<SERIES>
   <NUMBER> 146
   <NAME> BOND PORTFOLIO
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          SEP-30-1997
<PERIOD-START>                             APR-01-1997
<PERIOD-END>                               SEP-30-1997
<INVESTMENTS-AT-COST>                            60701
<INVESTMENTS-AT-VALUE>                           61925
<RECEIVABLES>                                      873
<ASSETS-OTHER>                                     289
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                   63087
<PAYABLE-FOR-SECURITIES>                          2984
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          447
<TOTAL-LIABILITIES>                               3431
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                         57982
<SHARES-COMMON-STOCK>                             3585
<SHARES-COMMON-PRIOR>                             3876
<ACCUMULATED-NII-CURRENT>                          106
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                            343
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                          1225
<NET-ASSETS>                                     59656
<DIVIDEND-INCOME>                                   58
<INTEREST-INCOME>                                 4253
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                     730
<NET-INVESTMENT-INCOME>                           3581
<REALIZED-GAINS-CURRENT>                          1244
<APPREC-INCREASE-CURRENT>                          942
<NET-CHANGE-FROM-OPS>                             5767
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                       (3585)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                          10587
<NUMBER-OF-SHARES-REDEEMED>                    (19603)
<SHARES-REINVESTED>                               2790
<NET-CHANGE-IN-ASSETS>                          (4044)
<ACCUMULATED-NII-PRIOR>                            110
<ACCUMULATED-GAINS-PRIOR>                        (900)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              364
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    756
<AVERAGE-NET-ASSETS>                             61265
<PER-SHARE-NAV-BEGIN>                            16.06
<PER-SHARE-NII>                                   0.96
<PER-SHARE-GAIN-APPREC>                           0.58
<PER-SHARE-DIVIDEND>                            (0.96)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              16.64
<EXPENSE-RATIO>                                   1.19
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000356682
<NAME> CALVERT SOCIAL INVESTMENT FUND
<SERIES>
   <NUMBER> 154
   <NAME> EQUITY PORTFOLIO, CLASS A
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          SEP-30-1997
<PERIOD-START>                             APR-01-1997
<PERIOD-END>                               SEP-30-1997
<INVESTMENTS-AT-COST>                           127733
<INVESTMENTS-AT-VALUE>                          156493
<RECEIVABLES>                                      462
<ASSETS-OTHER>                                     263
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  157218
<PAYABLE-FOR-SECURITIES>                          3604
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          364
<TOTAL-LIABILITIES>                               3968
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        104017
<SHARES-COMMON-STOCK>                             5294
<SHARES-COMMON-PRIOR>                             4496
<ACCUMULATED-NII-CURRENT>                          120
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                          15053
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         27812
<NET-ASSETS>                                    147002
<DIVIDEND-INCOME>                                 1379
<INTEREST-INCOME>                                  101
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                    1446
<NET-INVESTMENT-INCOME>                             34
<REALIZED-GAINS-CURRENT>                         16268
<APPREC-INCREASE-CURRENT>                        17072
<NET-CHANGE-FROM-OPS>                            33374
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                         (35)
<DISTRIBUTIONS-OF-GAINS>                        (6816)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                          35065
<NUMBER-OF-SHARES-REDEEMED>                    (22155)
<SHARES-REINVESTED>                               6225
<NET-CHANGE-IN-ASSETS>                           45658
<ACCUMULATED-NII-PRIOR>                             86
<ACCUMULATED-GAINS-PRIOR>                         5636
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              659
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   1462
<AVERAGE-NET-ASSETS>                            120623
<PER-SHARE-NAV-BEGIN>                            22.54
<PER-SHARE-NII>                                    0.0
<PER-SHARE-GAIN-APPREC>                           6.73
<PER-SHARE-DIVIDEND>                            (0.01)
<PER-SHARE-DISTRIBUTIONS>                       (1.49)
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              27.77
<EXPENSE-RATIO>                                   1.20
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000356682
<NAME> CALVERT SOCIAL INVESTMENT FUND
<SERIES>
   <NUMBER> 126
   <NAME> EQUITY PORTFOLIO, CLASS C
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          SEP-30-1997
<PERIOD-START>                             APR-01-1997
<PERIOD-END>                               SEP-30-1997
<INVESTMENTS-AT-COST>                           127733
<INVESTMENTS-AT-VALUE>                          156493
<RECEIVABLES>                                      462
<ASSETS-OTHER>                                     263
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  157218
<PAYABLE-FOR-SECURITIES>                          3604
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          364
<TOTAL-LIABILITIES>                               3968
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                          5028
<SHARES-COMMON-STOCK>                              237
<SHARES-COMMON-PRIOR>                              138
<ACCUMULATED-NII-CURRENT>                         (98)
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                            372
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                           946
<NET-ASSETS>                                      6248
<DIVIDEND-INCOME>                                   51
<INTEREST-INCOME>                                    4
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                     103
<NET-INVESTMENT-INCOME>                           (48)
<REALIZED-GAINS-CURRENT>                           590
<APPREC-INCREASE-CURRENT>                          662
<NET-CHANGE-FROM-OPS>                             1204
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                          (1)
<DISTRIBUTIONS-OF-GAINS>                         (232)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                           2841
<NUMBER-OF-SHARES-REDEEMED>                      (780)
<SHARES-REINVESTED>                                221
<NET-CHANGE-IN-ASSETS>                            3253
<ACCUMULATED-NII-PRIOR>                           (49)
<ACCUMULATED-GAINS-PRIOR>                           14
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                               24
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    104
<AVERAGE-NET-ASSETS>                              4477
<PER-SHARE-NAV-BEGIN>                            21.71
<PER-SHARE-NII>                                 (0.05)
<PER-SHARE-GAIN-APPREC>                           6.21
<PER-SHARE-DIVIDEND>                            (0.01)
<PER-SHARE-DISTRIBUTIONS>                       (1.49)
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              26.37
<EXPENSE-RATIO>                                   2.30
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

Exhibit 16


SCHEDULE FOR COMPUTATION OF PERFORMANCE QUOTATION
(UNAUDITED)

INTERNAL RATE OF RETURN CALCULATION FOR CERTAIN CSIF SPECIAL EQUITIES


Calvert Social Investment Fund

n = number of cash flows
CFj = cash flow at period j
IRR = Internal Rate of Return

             k
o =  sigma symbol    CFj  [1-(1 + IRR) nj /IRR]  [(1 + IRR) - sigma nl ] + CFo
            j = 1                                             l less than j

Computation of the internal rate of return for certain CSIF special equities
investments  for the period from December 1992 through September, 1997.

Calculation for set of cash flows below 16%.
Cash flows = cash disbursement (including warrant exercise, if any), plus
receipts.  Assuming full liquidation of remaining assets in final period at
9/30/97 fair market value.

Period 1          -350,000          1992
Period 2          -600,000          1993
Period 3          -1,839,996        1994
Period 4          -1,381,987        1995
Period 5          -429,580          1996
Period 6          6,986,190         9/30/97






© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission