GREEN CENTURY FUNDS
485BPOS, 2000-11-28
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<PAGE>   1



       As filed with the Securities and Exchange Commission on November 28, 2000

                                        Securities Act Registration No. 33-41692
                               Investment Company Act Registration No. 811-06351

================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM N-1A

   REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933               |X|

                      Pre-Effective Amendment No. ____                   |_|
                       Post-Effective Amendment No. 15                   |X|

                                     and/or

   REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940       |X|

                              Amendment No. 18                           |X|
                        (Check appropriate box or boxes)

                               GREEN CENTURY FUNDS
               (Exact Name of Registrant as Specified in Charter)
                           29 Temple Place, Suite 200
                           Boston, Massachusetts 02111
                    (Address of Principal Executive Offices)

        REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE: 617-482-0800

           Kristina A. Curtis, Green Century Capital Management, Inc.
                  29 Temple Place, Boston, Massachusetts 02111
                     (Name and Address of Agent for Service)

                                    Copy to:
              Constance Dye Shannon, Sunstone Financial Group, Inc.
       803 West Michigan Street, Suite A, Milwaukee, Wisconsin 53233-2301


     It is proposed that this filing will become effective:

     (X) immediately upon filing pursuant to paragraph (b)

     ( ) on (date) pursuant to paragraph (b)

     ( ) 60 days after filing pursuant to paragraph (a)(i)

     ( ) on (date) pursuant to paragraph (a)(i)

     ( ) 75 days after filing pursuant to paragraph (a)(ii)

     ( ) on (date) pursuant to paragraph (a)(ii) of Rule 485.


     If appropriate, check the following box:

     (..) this Post-Effective Amendment designates a new effective date for a
          previously filed Post-Effective Amendment.

Domini Social Index Portfolio has also executed this Registration Statement.

================================================================================
<PAGE>   2
                                                                      Prospectus




                                                               NOVEMBER 28, 2000




                                                                   BALANCED FUND


                                                                     EQUITY FUND





As with all mutual funds, the Securities and Exchange Commission has not
approved or disapproved these securities or passed upon the adequacy of this
prospectus. Any representation to the contrary is a criminal offense.




                                                      [GREEN CENTURY FUNDS LOGO]
                                                  An Investment For Your Future.

<PAGE>   3

TABLE OF CONTENTS

AN OVERVIEW OF THE FUNDS



Objectives, Strategies and Risks                                               1
Annual Returns                                                                 3
Fees                                                                           4

ENVIRONMENTALLY RESPONSIBLE INVESTING

The Green Century Funds' Environmental Standards                               5
Advocates for Corporate Environmental Responsibility                           6
Support for Not-for-Profit Environmental Organizations                         7

YOUR ACCOUNT

Account Minimums                                                               8
How to Purchase Shares                                                         8
How to Sell Shares                                                            10
Transaction Information                                                       10
Shareholder Account Statements                                                12
Dividends and Taxes                                                           12
Valuation of Shares                                                           12
Shares and Voting Rights                                                      12

ORGANIZATION AND MANAGEMENT OF THE GREEN CENTURY FUNDS

The Green Century Balanced Fund                                               13
The Green Century Equity Fund and the Index Portfolio                         13
The Green Century Funds                                                       14

ADDITIONAL INFORMATION ABOUT THE FUNDS' INVESTMENT OBJECTIVES,
STRATEGIES AND RISKS

The Green Century Balanced Fund                                               15
The Green Century Equity Fund                                                 16
Master-Feeder Investment Fund Structure                                       17
The Green Century Funds                                                       17


FINANCIAL HIGHLIGHTS


FOR INFORMATION ON THE GREEN CENTURY FUNDS, CALL 1-800-93-GREEN OR E-MAIL US
AT: [email protected]. FOR INFORMATION ON HOW TO OPEN AN ACCOUNT, AND
OTHER ACCOUNT SERVICES, CALL 1-800-221-5519 9:00AM TO 5:00PM EASTERN TIME,
MONDAY THROUGH FRIDAY. FOR DAILY SHARE PRICE INFORMATION AND ACCOUNT BALANCES
CALL 1-800-221-5519, TWENTY-FOUR HOURS A DAY.



<PAGE>   4


  AN OVERVIEW OF THE FUNDS

Founded by a partnership of non-profit environmental advocacy organizations, the
Green Century Funds (Green Century or the Funds) are an open-end, diversified,
no-load family of environmentally conscious mutual funds. Green Century provides
people who care about a clean, healthy planet the opportunity to use the clout
of their investment dollars to encourage environmentally responsible corporate
behavior. This prospectus describes the Green Century Balanced Fund and the
Green Century Equity Fund.

The following is designed to help you decide whether the Green Century Funds are
appropriate for you. Below you will find information about each Fund's
investment objectives, strategies, risks, performance and fees.

WHAT ARE THE OBJECTIVES OF THE GREEN CENTURY FUNDS?

     THE GREEN CENTURY BALANCED FUND seeks capital growth and income from a
     diversified portfolio of stocks and bonds which meet Green Century's
     standards for corporate environmental responsibility.

     THE GREEN CENTURY EQUITY FUND'S objective is to achieve long-term total
     return which matches the performance of an index composed of the stocks of
     400 companies selected based on social and environmental criteria.

WHAT ARE THE PRINCIPAL INVESTMENT STRATEGIES?

     THE GREEN CENTURY BALANCED FUND invests primarily in the stocks and bonds
     of environmentally responsible companies, many of which also make positive
     environmental contributions. There is no predetermined percentage of assets
     allocated to either stocks or bonds, although the Balanced Fund will
     generally invest at least 25% of its net assets in bonds and may not invest
     more than 75% of its net assets in stocks.

     The Green Century Balanced Fund seeks to invest in environmentally
     distinguished companies. In the Fund manager's experience, environmentally
     responsible companies tend to be small in size and tend to be growth rather
     than value companies. While the Fund may invest in companies of various
     sizes, the Fund may be more heavily weighted in smaller companies. The Fund
     may also invest in both growth and value stocks though it may be more
     heavily weighted in growth stocks. The bonds the Fund invests in may be of
     any maturity and credit quality. The Fund may invest up to 35% of its net
     assets in high yield, below investment grade bonds, commonly known as junk
     bonds.

     THE GREEN CENTURY EQUITY FUND invests substantially all of its assets in
     the Domini Social Index Portfolio (the Index Portfolio) which invests in
     the stocks which make up the Domini 400 Social Index (the Index or the
     Social Index). The Social Index is comprised of the common stocks of 400
     companies and is screened based on social and environmental criteria. The
     Index excludes those companies Green Century believes have the worst
     environmental and social records. The weightings of the stocks are based on
     market capitalizations, which means the largest companies comprise a higher
     percentage of the Index and the Index is more heavily weighted in large
     than in small companies. The Fund does not concentrate on a specific
     security or market sector. The Equity Fund is part of a master-feeder
     investment fund structure which means that the Fund invests in another
     registered investment company, the Index Portfolio, which has the same
     investment objective as the Fund.

ARE THE GREEN CENTURY FUNDS APPROPRIATE FOR ME?

     Before investing in the Funds, you should carefully consider your
     investment goals, your timeline for achieving your goals and your tolerance
     for risk.

                                       1

<PAGE>   5

     THE GREEN CENTURY BALANCED FUND may be appropriate if you are seeking
     income from bond investments and also want to be invested in the stock
     market for its long-term growth potential.

     THE GREEN CENTURY EQUITY FUND may be a suitable investment choice if you
     are seeking long-term growth from a portfolio of stocks.

     The Green Century Funds are not suitable if you are primarily seeking
     current income from investments, investing for a short period of time or
     are uncomfortable with the short-term volatility of the stock market.

WHAT ARE THE RISKS?

     Both Green Century Funds are heavily invested in stocks. Like all funds
     invested in stocks, each Green Century Fund's share price will fluctuate
     daily depending on the performance of the companies that comprise each
     Fund's investments, the general market and the economy overall. After you
     invest, the value of your shares may be less than what you paid for them.
     You may lose money by investing in the Funds. Also, as with any mutual
     fund, there can be no guarantee that either of the Green Century Funds will
     achieve its objective.

     The Funds' environmental criteria limit the available investments compared
     with funds with no such criteria. Under certain economic conditions, this
     could cause each Fund's investment performance to be worse or better than
     similar funds with no environmental criteria.

     THE GREEN CENTURY BALANCED FUND may be more heavily weighted in small
     companies which involves greater risk than investing in the stocks of
     larger, more established companies. Small companies may lack the management
     experience, financial resources and product diversification of large
     companies and the frequency and volume of their trading may be less than
     that of larger companies. Therefore, the securities of small companies may
     be subject to wider and more erratic price fluctuations. The Balanced Fund
     may also invest up to 35% of its net assets in high yield, below investment
     grade bonds which involves greater risk than investing in more highly rated
     bonds, including the possibility of late payments, default or bankruptcy.
     Higher yielding bonds may also be more negatively impacted by interest rate
     changes than higher quality bonds.

     THE GREEN CENTURY EQUITY FUND invests essentially all of its assets in the
     stock market. As with all equity funds, the share price will fluctuate and
     may fall if the market as a whole declines or the value of the companies in
     which it invests falls. The large companies in which the Fund's portfolio
     is invested may perform worse than the stock market as a whole. The Fund
     will invest in the Social Index regardless of how the Index is performing.
     It will not shift concentration from one industry to another, or from
     stocks to bonds or cash, in order to defend against a falling stock market.



                                       2

<PAGE>   6


HOW HAVE THE FUNDS PERFORMED IN THE PAST?

     The charts and table below provide some indication of the risks of
     investing in the Funds by illustrating that returns can differ from one
     year to the next and by comparing this information to broad measures of
     market performance. Each Fund's past performance is no guarantee of how it
     will perform in the future.

ANNUAL TOTAL RETURNS


                                     [GRAPH]

                                     [GRAPH]



As of September 30, 2000, the year-to-date return for the Green Century Balanced
Fund was 43.46%. As of the same date, the year-to-date return for the Green
Century Equity Fund was -7.92%.


<TABLE>
<CAPTION>
   GREEN CENTURY BALANCED FUND                                     GREEN CENTURY EQUITY FUND
<S>                                       <C>                      <C>                                   <C>
   Best Quarter Ended 12/31/99             52.63%                  Best Quarter Ended 12/31/98           24.46%
   Worst Quarter Ended 9/30/98            -21.97%                  Worst Quarter Ended 9/30/98           -9.92%
</TABLE>


                                       3

<PAGE>   7


AVERAGE ANNUAL TOTAL RETURNS



<TABLE>
<CAPTION>
     FOR THE PERIODS ENDED                    1 YEAR   5 YEARS        SINCE INCEPTION
     DECEMBER 31, 1999
<S>                                           <C>      <C>            <C>
     Green Century Balanced Fund               76.39%    22.78%           14.09%
     (Inception March 18, 1992)
     Lipper Balanced Fund Index                 8.98%    16.33%           12.63%

     Green Century Equity Fund                 21.97%    29.11%           19.17%
     (Inception June 3, 1991*)
     S&P 500(R)Index                           21.04%    28.56%           19.41%
</TABLE>



*  The Green Century Equity Fund, which commenced investment operations in
   September 1995, invests all of its assets in an existing separate registered
   investment company which has the same investment objective as the Fund (the
   Index Portfolio). Consistent with regulatory guidance, the performance for
   the period prior to the Fund's inception, as listed below, reflects the
   performance of the Index Portfolio adjusted to reflect the deduction of the
   charges and expenses of the Fund.

WHAT FEES AND EXPENSES WILL I PAY?

     The following table describes the fees and expenses you may pay if you buy
     and hold shares of the Green Century Funds.



<TABLE>
<CAPTION>
                                                                                                BALANCED FUND        EQUITY FUND(3)
   SHAREHOLDER FEES (FEES PAID DIRECTLY FROM YOUR INVESTMENT)
<S>                                                                                             <C>                  <C>
      Maximum Sales Charge (Load) Imposed on Purchases                                                 --                   --
      Maximum Deferred Sales Charge (Load)                                                             --                   --
      Maximum Sales Charge (Load)  Imposed on Reinvested  Dividends and Other Distributions            --                   --
      Redemption Fee(1)                                                                                --                   --
      Exchange Fee                                                                                     --                   --
   ANNUAL FUND OPERATING EXPENSES (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)
      Management Fees                                                                                0.75%                0.20%
      Distribution (12b-1) Fees                                                                      0.25%                  --
      Other Expenses:
         Administrative Fees(2)                                                                      1.48%                1.29%
         Other Fees                                                                                    --                 0.01%
   TOTAL ANNUAL FUND OPERATING EXPENSES                                                              2.48%                1.50%
</TABLE>


(1)  A fee of $10.00 is charged for redemptions by wire. There is no charge for
     redemptions paid by check.
(2)  Green Century Capital Management, Inc. (Green Century Capital Management),
     the administrator of each Fund, pays the operating expenses of the Funds
     (excluding interest, taxes, brokerage costs and other capital expenses and
     any extraordinary expenses). For this and other services, each Fund pays
     Green Century Capital Management an Administrative Fee at a rate such that
     the Equity Fund's total annual expenses are limited to 1.50% of the Equity
     Fund's average net assets and the Balanced Fund's total annual expenses are
     limited to 2.50% of the Balanced Fund's average net assets up to $30
     million, 2.25%on its average net assets from $30 million to $100 million,
     and 1.75% on the Balanced Fund's average net assets in excess of $100
     million.
(3)  For the Equity Fund, the table reflects the fees and expenses of the Equity
     Fund and of the Index Portfolio in which it invests its assets, combined.

EXAMPLE. This example is intended to help you compare the costs of investing in
a Green Century Fund with the cost of investing in other mutual funds. This
example assumes that: (1) you invest $10,000 in a Fund; (2)redeem all of your
shares at the end of the periods shown; (3) earn a 5% return each year; and (4)
the operating expenses remain the same. Although your actual costs may be higher
or lower, based on these assumptions your costs would be:


<TABLE>
<CAPTION>
                                                            1 YEAR            3 YEARS      5 YEARS          10 YEARS
<S>                                                       <C>                 <C>          <C>              <C>
      Balanced Fund                                       $    251            $   773       $1321            $ 2816
      Equity Fund                                         $    153            $   474       $ 818            $ 1791
</TABLE>



                                       4

<PAGE>   8

  ENVIRONMENTALLY RESPONSIBLE INVESTING

THE GREEN CENTURY FUNDS' ENVIRONMENTAL STANDARDS

Environmentally responsible investing is investing based on your financial goals
and your environmental values. While each Green Century Fund shares a commitment
to environmental responsibility, each Fund employs a different strategy. This
section is dedicated to describing Green Century's environmentally responsible
investment strategies.

The GREEN CENTURY BALANCED FUND strives to invest in companies whose business is
to protect the environment, and companies that have taken steps to minimize
their environmental impact. The Fund seeks to invest in businesses committed to
actively promoting a healthier environmental future. Such commitments might
include producing renewable energy, recycling waste, providing appropriate
technology for sustainable agriculture and offering effective remedies for
existing environmental problems. The Fund also invests in companies whose
primary business is not solving environmental problems but which conduct their
business in an environmentally responsible manner. Green Century believes that
well-managed environmentally responsible companies minimize their environmental
risks, allowing them to enjoy competitive advantages from cost reductions,
quality improvements, profitability enhancements and access to expanding and new
growth markets. Thus, for both environmental and financial reasons, Green
Century applies rigorous selection criteria concerning the environmental
behavior of the companies in which the Fund invests.

Environmental companies included in the portfolio develop products or processes
that solve environmental problems in areas such as: alternative energy
production, energy efficiency, water treatment and conservation, air pollution
control, resource recovery, and pollution prevention. This category includes
companies whose primary business is related to improving the environment and
companies which have developed important environmental products or services as a
significant component of their business.

Companies in the portfolio may also include environmentally benign companies
whose overall impact on the environment, as measured by their consumption of
natural resources, toxic emissions, environmental liabilities, solid waste
generation and compliance with environmental law, is minimal but not necessarily
nonexistent. Winslow Management Company (Winslow), the subadviser of the
Balanced Fund, in cooperation with Green Century Capital Management, works with
companies that do not have an articulated proactive environmental strategy to
help them craft a comprehensive and proactive environmental program.

The Balanced Fund also invests in what Green Century Capital Management and
Winslow perceive as "best in its class" companies that have implemented an
environmental program that sets a standard for their industry group. These
companies are recognized leaders in their sectors, contribute to meaningful
reductions in pollutant emissions or waste generation, and demonstrate Green
Century's belief that every company can be environmentally responsible.

Finally, environmentally responsible companies include environmental turnaround
companies that may have a history of environmental problems, but have taken
substantive steps to address the problems and minimize their impact on the
environment. Turnaround companies include those who have abandoned certain
products or processes that have been proven harmful to the environment,
significantly reduced toxic emissions, or adopted broadscale pollution
prevention and waste minimization programs.

THE GREEN CENTURY EQUITY FUND invests substantially all its assets in the Index
Portfolio which invests in the 400 companies which make up the Social Index. The
Index is screened to exclude those companies with the worst environmental and
social records. This strategy directs environmentally concerned investors'
dollars away from companies that flout basic standards for environmental
responsibility. Green Century believes this creates an incentive for companies
to become better environmental citizens.



                                       5
<PAGE>   9

Green Century also believes that those companies which pursue the least
environmentally sound practices are at the greatest long term risk of negative
economic consequences, while those which strive to be more environmentally
responsible may benefit financially as a result. Enterprises which exhibit a
social awareness should be better prepared to meet future societal needs for
goods and services and may be less likely to incur certain legal liabilities
that may be charged when a product or service is determined to be harmful. Green
Century believes that over the long term such enterprises should be able to
provide investors with a return that is competitive with enterprises that do not
exhibit such social awareness.

In evaluating stocks for inclusion in the Social Index, Kinder, Lydenberg,
Domini & Co., Inc. (KLD) considers a company's environmental performance;
employee relations; corporate citizenship; product-related issues; and attitudes
with regard to consumer issues.

Environmental performance includes a company's record on waste disposal, toxic
emissions, fines or penalties, and efforts in waste and emissions reductions,
recycling, and use of environmentally beneficial fuels, products and services.
Corporate citizenship includes the company's record on philanthropic activities
and its interaction with the communities it affects. Employee relations include
a company's record with regard to labor matters, its commitment to workplace
safety, the breadth, quality and innovation of its employee benefit programs,
and its commitment to provide employees with a meaningful participation in
company profits either through stock purchase or profit sharing plans. KLD seeks
to exclude companies which, based on data available to it, derive more than 2%
of their gross revenues from the sale of military weapons; derive any revenues
from the manufacture of tobacco products or alcoholic beverages; derive any
revenues from gambling enterprises; own directly or operate nuclear power plants
or participate in businesses related to the nuclear fuel cycle.

Neither the Green Century Balanced Fund nor the Green Century Equity Fund will
knowingly invest in a company primarily engaged in the production of nuclear
energy or the manufacture of nuclear equipment to produce nuclear energy or
nuclear weapons, in the belief that these products are unacceptably threatening
to a sustainable global environment. The Funds will not knowingly invest in a
company primarily engaged in the manufacture of tobacco products, a major
contributor to indoor air pollution and environmental health problems.

The Green Century Funds usually invest in many sectors of the economy, such as
retail, finance, and consumer products. The Funds are not environmental sector
funds which invest exclusively in companies whose business derives from
environmental problems (such as waste-management or incinerator manufacturers),
some of which have consistently negative environmental records.

THE GREEN CENTURY FUNDS ADVOCATE FOR CORPORATE ENVIRONMENTAL RESPONSIBILITY

The Green Century Funds believe that shareholder advocacy is a critical
component of environmentally responsible investing and is actively involved in
advocating for greater corporate environmental accountability.

Green Century uses its collective leverage, as shareholders, to advocate for
more environmentally responsible policies at the companies in which the Funds
invest. Green Century has worked with other environmentally conscious investors
to file shareholder resolutions to preserve and protect threatened ecosystems;
demand more aggressive recycling programs; more responsible environmental,
health and safety policies; and more environmentally friendly production and
purchasing policies. Green Century is committed to pursuing demands for improved
corporate environmental responsibility. As part of this strategy, the Green
Century Balanced Fund may hold small positions in companies which do not meet
the Fund's environmental criteria for the express purpose of enabling the Fund
to advocate for changes in irresponsible corporate behavior.



                                       6

<PAGE>   10

THE GREEN CENTURY FUNDS SUPPORT NOT-FOR-PROFIT ENVIRONMENTAL ORGANIZATIONS


The Green Century Funds were founded by non-profit environmental advocacy
organizations. Unlike other investment advisers and administrators that are
privately owned for the benefit of individuals or for-profit corporations, Green
Century Capital Management is owned by Paradigm Partners, a California general
partnership, the partners of which are all not-for-profit environmental advocacy
organizations. This means that 100% of the net profits earned by Green Century
Capital Management on the fees it receives for managing the Funds belong to
these not-for-profit environmental advocacy organizations. These revenues will
be used to further efforts to preserve and protect the environment-efforts that
include filing lawsuits against companies that illegally pollute our air and
waterways, campaigning to increase recycling and reduce wasteful packaging, and
researching and advocating to reduce the use of toxic chemicals. The
environmental organizations which founded and own Green Century Capital
Management are: California Public Interest Research Group (CALPIRG), Citizen
Lobby of New Jersey, Colorado Citizen Lobby, ConnPIRG Citizen Lobby, Fund for
Public Interest Research, Massachusetts Public Interest Research Group
(MASSPIRG), MOPIRG Citizen Organization, PIRGIM Public Interest Lobby, and
Washington State Public Interest Research Group (WASHPIRG).



                                       7


<PAGE>   11

  YOUR ACCOUNT

  FOR INFORMATION ON THE GREEN CENTURY FUNDS, CALL 1-800-93-GREEN. FOR
  INFORMATION ON HOW TO OPEN AN ACCOUNT, AND OTHER ACCOUNT SERVICES, CALL
  1-800-221-5519 9:00AM TO 5:00PM EASTERN TIME, MONDAY THROUGH FRIDAY. FOR DAILY
  SHARE PRICE INFORMATION AND ACCOUNT BALANCES CALL 1-800-221-5519, TWENTY-FOUR
  HOURS A DAY.



     This section describes various shareholder policies including:

     -    account minimums
     -    how to purchase and sell shares
     -    dividends and taxes
     -    valuation of shares
     -    a description of voting rights and liabilities

  ACCOUNT MINIMUMS

  TO OPEN AN ACCOUNT

<TABLE>
<S>                                                                         <C>
     Regular Investment Account                                             $2,000
     Individual Retirement Account (IRA) and Education IRA                    $500
     Uniform Gift or Transfer to Minors Account (UGMA/UTMA)                   $500
</TABLE>

  NO MINIMUM INITIAL INVESTMENT IS REQUIRED FOR INVESTORS WHO WISH TO OPEN AN
  ACCOUNT WITH A $100 OR MORE A MONTH AUTOMATIC INVESTMENT PLAN.

  TO ADD TO AN ACCOUNT

<TABLE>
<S>                                          <C>
     By Check, Wire or Exchange              $100
     By Automatic Investment Plan             $50
</TABLE>


  MINIMUM    Shareholders are encouraged to maintain a share balance of at
  BALANCES   least $1,000. Individual Retirement Accounts, Education IRAs and
             Uniform Gift or Transfer to Minors Act accounts have a $500
             minimum balance requirement. The Funds reserve the right,
             following 60 days' written notice to shareholders, to redeem all
             shares in accounts with balances less than the minimum. The Funds
             will mail the proceeds of the redeemed account to the shareholder.
             This provision does not apply to Automatic Investment Plan
             accounts. If the value of your account falls below the minimum as
             a result of market activity, an involuntary redemption will not be
             triggered.


  HOW TO PURCHASE SHARES

  OPENING AN ACCOUNT

  MAIL       To open an account by check, please complete and sign the
             registration form and mail it with a check made payable to Green
             Century Balanced Fund or Green Century Equity Fund to:

                        GREEN CENTURY FUNDS
                        P.O. BOX 6110
                        INDIANAPOLIS, INDIANA 46206-6110

  WIRE       You may also open an account by instructing your bank to wire
             Federal funds (monies of member banks within the Federal Reserve
             System) to the Green Century Funds' custodian bank. Your bank may
             impose a fee for sending a wire. If you are opening a new account
             by wire transfer, you must telephone the Funds to obtain
             additional information about this alternative. The Funds will not
             be responsible for the consequences of delays, including delays in
             the banking or Federal Reserve wire systems.


                                       8

<PAGE>   12

              Please call 1-800-221-5519 weekdays from 9:00 a.m. to 5:00 p.m.
              Eastern Time for more information about how to purchase shares by
              wire. After calling, complete the registration form and mail it to
              the address given above. Wire the amount of your initial
              investment per the following instructions:

                        UNION FEDERAL SAVINGS BANK OF INDIANAPOLIS, INDIANA
                        ABA#: 274070484
                        DDA#: 590144707
                        GREEN CENTURY BALANCED FUND OR GREEN CENTURY EQUITY FUND
                        FOR FURTHER CREDIT: YOUR NAME AND YOUR GREEN CENTURY
                        FUNDS ACCOUNT NUMBER


  EXCHANGE    You may also open an account in one Fund by exchanging shares with
              a value of $2,000 or more ($500 for an IRA, Education IRA or
              UGMA/UTMA account) from another Green Century Fund. Your new
              account will be established using the same name(s) and address as
              your existing account.

              To exchange by telephone, call 1-800-221-5519 weekdays from 9:00
              a.m. to 5:00 p.m. Eastern Time. To exchange by letter, write to
              the Green Century Funds at the address given above, including the
              name of the Fund from which you are exchanging, the registered
              name(s) of ownership and address, the account number, the dollar
              amount or number of shares to be exchanged and the Fund into which
              you are exchanging. Sign your name(s) exactly as it appears on
              your account statement. The exchange requirements for
              corporations, other organizations, trusts, fiduciaries,
              institutional investors and retirement plans may be different from
              those for individual accounts. Please call 1-800-221-5519 for more
              information. The Funds reserve the right to modify or terminate
              the exchange privilege upon 60 days prior written notice to
              shareholders.

  AUTOMATIC   You may open an account with no initial investment if you enroll
  INVESTMENT  in the Automatic Investment Plan and invest a minimum of $100 a
              month through the Plan. Complete and sign the registration form,
              including the Automatic Investment Plan section and mail it to:
              Green Century Funds, P.O. Box 6110, Indianapolis, IN 46206-6110.
              You may terminate your participation in the Automatic Investment
              Plan at any time with written notification to the Funds at the
              same address.


  MAKING ADDITIONAL INVESTMENTS

  MAIL        You may make subsequent investments by submitting a check for $100
              or more with the remittance form sent to you with your account
              statement. You may also mail your check with a letter of
              instruction indicating the amount of your purchase, your account
              number, and the name in which your account is registered, to:

                        GREEN CENTURY FUNDS
                        P.O. BOX 6110
                        INDIANAPOLIS, IN 46206-6110

  WIRE        You may also make additional investments by instructing your bank
              to wire Federal funds. Your bank may impose a fee for sending the
              wire. The Green Century Funds cannot be responsible for the
              consequences of delays, including delays in the banking or Federal
              Reserve wire systems. Wire your additional investment per the
              instructions which follow.

                        UNION FEDERAL SAVINGS BANK OF INDIANAPOLIS, INDIANA
                        ABA#: 274070484
                        DDA#: 590144707
                        GREEN CENTURY BALANCED FUND OR GREEN CENTURY EQUITY FUND
                        FOR FURTHER CREDIT: YOUR NAME AND YOUR GREEN CENTURY
                        FUNDS ACCOUNT NUMBER

                                       9

<PAGE>   13

  EXCHANGE    Follow instruction in "Exchange" under "Opening an Account".

  AUTOMATIC   You may arrange to make regular investments through automatic
  INVESTMENT  deductions from your checking or savings account. If you wish to
  PLAN        select this option, please complete the appropriate section on
              your registration form. If you wish to set up an Automatic
              Investment Plan after opening an account, please call
              1-800-93-GREEN for further information. You may terminate your
              participation in the Automatic Investment Plan at any time with
              written notification to the Funds at P.O. Box 6110, Indianapolis,
              IN 46206-6110.

  HOW TO SELL SHARES (REDEMPTIONS)

  You can take money out of your account at any time by selling (redeeming) some
  or all of your shares. See also Processing Time on page 11.

  TELEPHONE   This is the quickest and easiest way to sell Fund shares.
              In order to be able to redeem your shares by telephone,
              you must elect this option on your registration form when you
              open your account. If you did not elect telephone redemption on
              your registration form, call 1-800-221- 5519 for more
              information. If you elected telephone redemption on your
              registration form, call 1-800-221-5519 to request either that the
              monies be wired or sent by check to the authorized bank account
              listed on your registration form or that a check be sent to you
              at the address listed on your registration form. You must also
              provide your name, address, Fund account number and social
              security number before you may redeem shares by telephone. All
              telephone redemption requests are recorded. There will be a
              charge for all wire redemptions. There is no charge for
              redemption by check. If you open an account by wire, you cannot
              redeem shares by telephone until the Funds' transfer agent has
              received your completed and signed registration form. Telephone
              redemption is not available for shares held in IRA accounts.

  MAIL        In order to redeem your shares by mail, send a letter to the Green
              Century Funds and include the Fund name, the account registration
              name(s) and address, the account number, and the dollar amount or
              the number of shares you wish to redeem. Mail your letter to:

                        GREEN CENTURY FUNDS
                        P.O. BOX 6110
                        INDIANAPOLIS, IN 46206-6110

  Sign your name(s) exactly as it appears on your account statement. For your
  protection and to prevent fraudulent redemptions, we require a signature
  guarantee for the signature of each person in whose name the account is
  registered on written redemption requests. You can obtain a signature
  guarantee from most banks, brokerage firms and savings institutions. Neither a
  notary public nor organizations which do not provide reimbursement in the case
  of fraud may provide a signature guarantee. The redemption requirements for
  corporations, other organizations, trusts, fiduciaries, institutional
  investors and Individual Retirement Accounts (IRAs) may be different from
  those for regular accounts. For more information please call 1- 800-221-5519.

TRANSACTION INFORMATION

PURCHASES BY CHECK. Checks must be made payable to the Green Century Balanced
Fund or the Green Century Equity Fund (or to the Green Century Funds). No third
party checks will be honored. Checks also must be drawn on or payable through a
U.S. bank and be in U.S. dollars. If you purchase shares with a check that is
returned due to insufficient funds, your purchase will be canceled and you will
be responsible for any losses or fees incurred in the transaction. If you
purchase shares by check and redeem them within 15 days of purchase, the Funds
will release your redemption proceeds when your check clears. It is possible,
although unlikely, that this could take up to 15 days. Redemption requests by
telephone, including exchanges, will be accepted prior to the expiration of the
15-day period if your check has cleared. If you purchase shares by Federal funds
wire, you may avoid this delay.


                                       10

<PAGE>   14


ACCOUNT INFORMATION CHANGES. To change information regarding an account
(including a new address, change of beneficiary, or change in the automatic
investment plan), you must send Green Century this information in writing.
Please mail the new information to: Green Century Funds, P.O. Box 6110,
Indianapolis, IN 46206-6110. Include your Green Century account number, as well
as your name, address, signature and phone number, along with the new
information. If you prefer, you may fax this information to: Green Century
Funds, 317-266-8756. You may confirm receipt of this information by calling
Green Century shareholders services at 1-800-221-5519.


LARGE REDEMPTIONS. If during any 90 day period, you redeem Fund shares worth
more than $250,000 (or 1% of a Fund's assets if that percentage is less than
$250,000), the Funds reserve the right to pay all or part of the redemption
proceeds in kind, that is, in securities rather than in cash. If payment is made
in kind, you may incur brokerage commissions if you elect to sell the securities
for cash.

CONFIRMATION OF TRANSACTIONS. All purchases and redemptions will be confirmed
promptly. Usually a confirmation of your purchase or sale of Fund shares will be
mailed on the business day following receipt of your instructions.

SHARE PRICE CALCULATION. Once each business day, the share price for each Fund
is calculated. This is the Fund's Net Asset Value (the NAV). Because the Green
Century Funds are no-load, this is also the offering price at which each Fund
share is sold. Shares are purchased at the next share price calculated after
your order is received in good form. Shares are sold at the next share price
calculated after your order is received in good form.

PROCESSING TIME. The Funds will normally send your redemption proceeds within
one business day following the redemption request, but may take up to seven days
(or longer in the case of shares recently purchased by check). All purchase and
redemption requests received in good order by the Funds' transfer agent are
executed, without a sales charge, at the next-determined net asset value.
Reinvested dividends receive the net asset value as of the ex-dividend date.

TAX INFORMATION. A redemption of shares, including an exchange into another
Fund, is a sale of shares and may result in a gain or loss for income tax
purposes. Please see below for additional information on Dividends and Taxes.

SOCIAL SECURITY OR TAX IDENTIFICATION NUMBER. Please be sure to complete the
Social Security or Tax Identification Number section of the Funds' registration
form when you open an account with the Green Century Funds. Federal tax law
requires the Funds to withhold 31% of taxable dividends, capital gains
distributions and redemption and exchange proceeds from accounts (other than
those of certain exempt payees) without a Social Security or Tax Identification
Number and certain other information or upon notification from the Internal
Revenue Service or a broker that withholding is required. The Funds reserve the
right to reject new account registrations without a Social Security or Tax
Identification Number. The Funds also reserve the right to close, by redemption,
accounts without Social Security or Tax Identification Numbers.

INDIVIDUAL RETIREMENT ACCOUNTS (IRAS) AND TAX DEFERRED ACCOUNTS. Shares of the
Funds are available for Individual Retirement Accounts (IRAs), Roth IRAs,
Simplified Employee Pension Plans (SEP-IRAs), SIMPLE IRAs, Education IRAs and
403(b)(7) accounts. For further information and to receive the appropriate
forms, please call 1-800-93-GREEN.

TELEPHONE TRANSACTION LIABILITY. All investors may initiate transactions (except
redemptions) by telephone upon opening an account. To redeem shares by
telephone, you must elect this option in writing. See page 10 for further
information. Neither the Funds nor any of their service contractors will be
liable for any loss or expense in acting upon any telephone instructions that
are reasonably believed to be genuine. In attempting to confirm that telephone
instructions are genuine, the Funds will use procedures that are considered to
be reasonable, including requesting a shareholder to provide information about
the account. To the extent that the Funds fail


                                       11


<PAGE>   15

to use reasonable procedures to verify the genuineness of telephone
instructions, the Funds and/or their service contractors may be liable for any
losses due to telephone instructions that prove to be fraudulent or
unauthorized.

SHAREHOLDER ACCOUNT STATEMENTS

Shareholders will receive quarterly statements showing all account activity
during that quarter, including dividends. Additional purchases and redemptions
will be confirmed promptly, usually as of the next business day after the
purchase or redemption request is received. The Green Century Funds will send
you detailed tax information on the amount and type of their dividends and
distributions each year.

DIVIDENDS AND TAXES

The Funds normally declare and pay income dividends semiannually in June and
December and distribute net capital gains once a year in December. Each Fund
intends to distribute substantially all of its income and net capital gains.

You may opt to receive distributions in cash (via check) or have them reinvested
in additional shares of the Funds. Dividends and capital gain distributions are
automatically reinvested unless you request otherwise. If you invest in an
Individual Retirement Account (IRA), all dividends and capital gains
distributions must be reinvested; however, if you are over 59 1/2 years old,
distributions from IRA accounts may be paid to you in cash (via check).

Except for tax-exempt accounts, including retirement accounts such as IRAs,
dividends from net investment income are taxable to shareholders as ordinary
income. Long-term capital gain distributions, if any (based on the applicable
long-term capital gain holding period), are taxable as long-term capital gains
regardless of the length of time you have owned your shares. Distributions of
short-term capital gains are taxable as ordinary income.

A shareholder may also be subject to state and local taxes on dividends and
distributions from the Funds. Shareholders will be notified to the extent, if
any, that dividends reflect interest received from U.S. Government securities.
Such dividends may be exempt from certain state income taxes.

VALUATION OF SHARES

The net asset value per share of each Green Century Fund is computed by dividing
the value of each Fund's total assets, less its liabilities, by the total number
of shares outstanding.

To determine the value of its assets, the Balanced Fund uses the current market
value of the securities it holds. To determine the value of its assets, the
Equity Fund uses the value of its interest in the Index Portfolio which is
determined based on the current market value of the securities held by the Index
Portfolio less its liabilities times the percentage which represents the Fund's
share of the Index Portfolio.

The net asset value per share of each Fund is determined every business day as
of the close of regular trading of the New York Stock Exchange (usually 4:00
p.m. Eastern Time). For share prices 24 hours a day, call 1-800-221-5519.

SHARES AND VOTING RIGHTS

As with other mutual funds, investors purchase shares when they put money in a
Fund. Each share and fractional share entitles the shareholder to:

     -    Receive a proportional interest in a Fund's income and capital gain
          distributions
     -    Cast one vote per share on certain Fund matters, including the
          election of the Funds' directors and changes in fundamental policies.

The Funds are not required to hold annual meetings and, to avoid unnecessary
costs, do not intend to do so except when certain matters, such as a change in
its fundamental policies, must be decided. If a meeting is held and you cannot
attend, you may vote by proxy. Before the meeting, the Funds will send you proxy
materials that explain the issues to be decided and include instructions on
voting.

                                       12

<PAGE>   16

  ORGANIZATION AND MANAGEMENT OF THE GREEN CENTURY FUNDS

This section provides details on how the Funds are organized and who manages the
Funds.

The Green Century Funds were organized on July 1, 1991 as a Massachusetts
business trust. The Green Century Funds are a diversified open-end management
investment company, a mutual fund. The Funds are governed by a Board of Trustees
which meets regularly to review the Funds' investments, performance, expenses,
environmental criteria and other business affairs. The Index Portfolio is
governed by its Board of Trustees.

THE GREEN CENTURY BALANCED FUND

INVESTMENT ADVISER. Green Century Capital Management, 29 Temple Place, Suite
200, Boston, Massachusetts 02111, is the investment adviser for the Balanced
Fund and oversees the portfolio management of the Balanced Fund on a day-to-day
basis. Green Century Capital Management's role is to ensure that the Balanced
Fund's investment objective and environmental and investment policies are
accurately and effectively implemented. Green Century Capital Management has
served as investment adviser and administrator for the Balanced Fund since the
commencement of operations of the Balanced Fund.

SUBADVISER. Winslow Management Company, 60 State Street, Boston, Massachusetts
02109 serves as the Subadviser for the Balanced Fund. Winslow, a division of
Adams, Harkness, & Hill, Inc. (AHH) conducts the day-to-day investment
management for the Balanced Fund consistent with the guidelines set by Green
Century Capital Management. Winslow uses a fundamental security analysis of each
investment. This qualitative approach is complemented with a computer model that
ranks a large group of securities based on several factors.


Winslow has managed investments in environmental and environmentally responsible
companies since 1984. Winslow has been a division of AHH since April 1, 1999 and
formerly was a division of Eaton Vance Management. As of September 30, 2000,
Winslow had $340 million in assets under management. Jackson W. Robinson has
served as the day-to-day portfolio manager of the Balanced Fund since July 1,
1995. Mr. Robinson has served as President of Winslow since 1984. Winslow is
paid by the Adviser (not the Fund).

FEES. For the services Green Century Capital Management and Winslow provided to
the Balanced Fund during the fiscal year ended July 31, 2000, they received a
total of 0.75% of the average daily net assets of the Fund.

THE GREEN CENTURY EQUITY FUND AND THE INDEX PORTFOLIO

INVESTMENT MANAGER. Domini Social Investments LLC, 536 Broadway, New York, New
York 10012 (DSI) provides investment supervisory services, operational support
and administrative services to the Index Portfolio. DSI was organized in April,
1997. It was formed by principals of KLD, the former investment adviser for the
Index Portfolio, and other investment company and marketing professionals.

INVESTMENT SUBMANAGER. Mellon Equity Associates LLP, 500 Grant Street,
Pittsburgh, Pennsylvania 15258 (Mellon Equity) provides investment submanagement
services to the Index Portfolio on a day-to-day basis. Mellon Equity determines
what securities shall be purchased, sold or exchanged to track the composition
of the Social Index. Mellon Equity does not determine the composition of the
Social Index.

Mellon Equity is a limited liability partnership founded in 1987. As of
September 30, 2000, Mellon Equity had approximately $39 billion in assets under
management. Mellon is paid by DSI (not by the Index Portfolio or the Equity
Fund.)

FEES. For services DSI and Mellon Equity provided to the Index Portfolio during
the fiscal year ended July 31, 2000, they received a total of 0.20% of the
average daily net assets of the Portfolio, after waivers.




                                       13

<PAGE>   17

THE GREEN CENTURY FUNDS

ADMINISTRATOR. Green Century Capital Management serves as the Administrator of
the Green Century Funds. Green Century Capital Management pays all the expenses
of each Fund except the investment advisory fees, if any; any Distribution Plan
fees; interest, taxes, brokerage costs and other capital expenses; expenses of
the non-interested Trustees of the Funds (including counsel fees); and any
extraordinary expenses.


For its services, the Administrator received a fee of 1.48% of the Balanced
Fund's average daily net assets and 1.29% of the Equity Fund's average daily net
assets for the Funds' most recent fiscal year.

SUBADMINISTRATOR. Sunstone Financial Group, Inc. (Sunstone) serves as the
sub-administrator of the Funds. Sunstone is responsible for conducting certain
administrative services for the Funds subject to the direction of Green Century
Capital Management. Sunstone receives a fee from the Administrator (not the
Funds). Sunstone and its affiliates provided administration, transfer agent
and/or distribution services to 27 fund families representing over $36 billion
in assets as of September 30, 2000.

DISTRIBUTOR AND DISTRIBUTION PLAN. Sunstone Distribution Services, LLC, an
affiliate of Sunstone, serves as the Distributor of the shares of the Funds. The
Board of Trustees of Green Century has adopted a Distribution Plan for the
Balanced Fund in accordance with Rule 12b-1 after determining that there is a
reasonable likelihood that the Distribution Plan will benefit the Fund and its
shareholders. The Balanced Fund pays a distribution fee to the Distributor at an
annual rate of up to 0.25% of the average daily net assets of the Fund. Because
these fees are paid out of the Fund's assets on an on-going basis, over time
these fees will increase the cost of your investment and may cost you more than
paying other types of sales charges.

TRANSFER AGENT. Unified Fund Services, Inc. is the transfer agent and
shareholder services provider for the Green Century Funds. As of September 30,
2000, Unified provided services to 26 fund groups representing over $4 billion
in assets.

CUSTODIAN. Investors Bank & Trust Company (IBT) is the custodian for the Green
Century Funds and the Index Portfolio. As of September 30, 2000, IBT had
approximately $268 billion in assets under custody and provided services for
approximately 68 mutual fund groups.


AUDITORS. KPMG LLP are the independent auditors of the Green Century Funds and
the Index Portfolio.



                                       14

<PAGE>   18

  ADDITIONAL INFORMATION ABOUT THE FUNDS' INVESTMENT OBJECTIVES,
  STRATEGIES AND RISKS

This section provides a detailed description of the Funds' investment
objectives, strategies and risks. The Statement of Additional Information
provides further information regarding the investment objectives, policies and
risk factors of the Funds.

THE GREEN CENTURY BALANCED FUND

The Green Century Balanced Fund's investment objective is to provide capital
growth and income from a diversified portfolio of stocks and bonds which meet
the Fund's standards for corporate environmental responsibility. The Balanced
Fund's assets may be invested in: common stock, preferred stock and other equity
securities, bonds and other fixed income securities, floating rate obligations,
and money market instruments, in each case, compatible with the Fund's
commitment to environmental responsibility. The other fixed income securities in
which the Fund may invest include: U.S. Government securities, mortgage-backed
securities, and zero coupon securities. The Fund may also engage in writing and
purchasing options on portfolio securities.

There is no predetermined percentage of assets allocated to either stocks or
bonds, although the Balanced Fund will generally invest at least 25% of its net
assets in fixed income securities (bonds). The Fund may not invest more than 75%
of its net assets in equity securities (stocks). For temporary defensive
purposes, the Fund may invest up to 100% of its assets in cash and other money
market and short-term instruments. Any such temporary defensive investing will
also comply with the Fund's environmental criteria. The effect of taking such a
position is that the Fund may not achieve its investment objective.

ZERO COUPON SECURITIES. The Balanced Fund may invest in zero coupon securities
which do not make regular interest payments; rather, they are sold at a discount
from face value. Principal and accrued discount (representing interest accrued
but not paid) are paid at maturity. Zero coupon securities are subject to
greater market value fluctuations from changing interest rates than debt
obligations of comparable maturities which make current cash distributions of
interest.


HIGH YIELD DEBT SECURITIES. The Balanced Fund may invest up to 35% of its net
assets in fixed income securities that, at the time of the investment, are
either rated CCC or higher by S&P or Caa or higher by Moody's or, if not rated,
considered to be of equivalent quality by the Subadviser of the Balanced Fund.
The Statement of Additional Information provides a description of bond rating
categories. Below investment grade securities (those rated below BBB by S&P or
Baa by Moody's or their equivalent) are commonly referred to as "junk bonds." As
of July 31, 2000, 23.71% of the net assets of the Balanced Fund were invested in
below investment grade securities.


While these securities generally offer higher yields than investment grade
securities with similar maturities, lower-quality securities involve greater
risks, including the possibility of default or bankruptcy. Generally, they are
considered to be predominantly speculative regarding, and more dependent on, the
issuer's ability to pay interest and repay principal. Such inability (or
perceived inability) would likely lessen the value of such securities, which
could lower the Fund's net asset value per share. Issuers of high-yield
securities may not be as strong financially as those issuing bonds with higher
credit ratings. Other potential risks associated with investing in high-yield
securities include: heightened sensitivity of highly-leveraged issuers to
adverse economic changes and individual-issuer developments; subordination to
the prior claims of other creditors; adverse publicity and changing investor
perceptions about these securities; and generally less liquid markets. The Fund
may incur additional expenses to the extent that it is required to seek recovery
upon a default in the payment of principal and interest on its holdings. Because
of the associated risks, successful investments in high-yield, high-risk
securities are more dependent on the Subadviser's credit analysis than generally
would be the case with investments in investment grade securities.


                                       15

<PAGE>   19

Many corporate high yield bonds are issued pursuant to Rule 144A under the
Securities Act of 1933 and therefore are subject to the Fund's restriction that
no more than 15% of the Fund's net assets can be invested in illiquid
securities.

REPURCHASE AGREEMENTS. As a means of earning income for periods as short as
overnight, the Balanced Fund may enter into repurchase agreements with selected
banks and broker-dealers. Under a repurchase agreement, the Fund acquires
securities, subject to the seller's agreement to repurchase at a specified time
and price. There may be delays and risks of loss if the seller is unable to meet
its obligation to repurchase. Default by the seller would expose the Fund to
possible loss because of adverse market action or delay in connection with the
disposition of the underlying obligations.

THE GREEN CENTURY EQUITY FUND

The Green Century Equity Fund's investment objective is to achieve long-term
total return which matches the performance of the Social Index, an index of
stocks of 400 companies selected by using social and environmental criteria. It
invests substantially all of its assets in the Index Portfolio, a diversified
portfolio of 400 common stocks. Since the investment characteristics of the
Equity Fund will correspond to those of the Index Portfolio, the following is a
description of the Index Portfolio's investment policies.

The Index Portfolio invests substantially all its assets in the common stocks
comprising the Social Index, developed and maintained by Kinder, Lydenberg,
Domini & Co., Inc. (KLD). The Index Portfolio is comprised of the common stocks
of approximately 400 companies and seeks to exclude corporations with poor
environmental and social records. In constructing the Index, KLD first considers
companies' environmental and social records. KLD also seeks to maintain a broad
representation of industries in the Index although certain industry sectors will
be excluded entirely based on the social criteria. KLD may also exclude from the
Index companies which are in bankruptcy or which KLD believes may soon be
bankrupt. The weightings of the stocks comprising the Social Index are based
upon market capitalization. To keep portfolio turnover low and to more
accurately reflect the performance of the market, the Index is maintained using
a "buy and hold" strategy. KLD may however remove a company from the Index if it
has been acquired by another company, if it is no longer financially viable, or
because its social profile has deteriorated. The criteria used in developing and
maintaining the Social Index involve subjective judgment by KLD. The Index
Portfolio is not managed in the traditional investment sense, since changes in
the composition of its securities holdings are made in order to track the
changes in the composition of securities included in the Social Index.

The Index Portfolio may invest cash reserves in high quality short-term debt
securities issued by agencies or instrumentalities of the United States
Government, bankers' acceptances, commercial paper, certificates of deposit,
bank deposits or repurchase agreements provided that the issuer satisfies KLD's
social criteria. The Index Portfolio's policy is to hold its assets in such
securities pending readjustment of its holdings of stocks comprising the Social
Index and in order to meet anticipated redemption requests. Such investments are
not intended to be used for defensive purposes in periods of anticipated market
decline.

The Index Portfolio buys and sells stocks periodically so that its holdings will
correspond, to the extent reasonably practicable, to the Social Index. The
timing and extent of adjustments in the holdings of the Index Portfolio, and the
extent of the correlation of the holdings of the Portfolio with the Index,
reflects the judgment of the Index Portfolio's submanager as to the appropriate
balance between the goal of correlating the holdings of the Index Portfolio with
the composition of the Index, and the goals of minimizing transaction costs and
keeping sufficient reserves available for anticipated redemptions from the Index
Portfolio. To the extent practicable, the Index Portfolio will seek a
correlation between the weightings of securities held by the Index Portfolio and
the weightings of the securities in the Social Index of 0.95 or better. A figure
of 1.00 would indicate a perfect correlation. The Index Portfolio's ability to
duplicate the performance of the Index will


                                       16

<PAGE>   20

depend to some extent on the size and timing of cash flows into and out of the
Index Portfolio as well as the Index Portfolio's expenses.

THE MASTER-FEEDER INVESTMENT FUND STRUCTURE

Unlike other mutual funds which directly manage their own portfolio securities,
the Equity Fund seeks to achieve its investment objective by investing all of
its investable assets in the Index Portfolio, a separate registered investment
company with the same investment objective as the Equity Fund. Other mutual
funds or institutional investors may also invest in the Index Portfolio on the
same terms and conditions as the Equity Fund and pay a proportionate share of
the Index Portfolio's expenses. However, the other investors may sell their
shares at different prices than the Equity Fund due to variations in sales
commissions and operating expenses; these differences may result in differences
in returns experienced by investors in the different funds that invest in the
Index Portfolio. Such differences in returns are also present in other mutual
fund structures.

The Equity Fund may withdraw its investment from the Index Portfolio if the
Board of Trustees of Green Century determines that it is in the best interest of
the Equity Fund to do so. The Board of Trustees would then consider what action
might be taken, including the investment of the assets of the Equity Fund in
another pooled investment entity having the same investment objective as the
Equity Fund or the retention of an investment adviser to manage the Equity
Fund's assets. There is currently no intention to change the Fund's investment
structure.

THE GREEN CENTURY FUNDS

Foreign Securities. While both Funds and the Index Portfolio emphasize
investment in U.S. companies, they may also invest in foreign securities. The
Balanced Fund may invest up to 25% of its assets in foreign securities of the
same types as the domestic securities in which the Fund may invest. The Funds
may also invest in American Depository Receipts ("ADRs") and the Balanced Fund
may invest in Global Depository Receipts ("GDRs") with respect to such foreign
securities. The Balanced Fund may also invest in certificates of deposit issued
by foreign banks, foreign and domestic branches of U.S. banks and obligations
issued or guaranteed by foreign governments or political subdivisions thereof.

Such investments increase a portfolio's diversification and may enhance return,
but they also involve some special risks, such as exposure to potentially
adverse local political and economic developments; nationalization and exchange
controls; potentially lower liquidity and higher volatility; possible problems
arising from accounting, disclosure, settlement, and regulatory practices that
differ from U.S. standards; and the chance that fluctuations in foreign exchange
rates will decrease the investment's value (favorable changes can increase its
value). Any foreign investments must be made in compliance with U.S. and foreign
currency restrictions and tax laws restricting the amounts and types of foreign
investments.


PORTFOLIO TURNOVER. Purchases and sales are made for a portfolio whenever
necessary, in management's opinion, to meet its investment objective. Higher
levels of activity result in higher transaction costs and may also result in
higher taxable capital gains distributions to shareholders. The portfolio
turnover rates of the Balanced Fund for the fiscal year ended June 30, 1998 was
96%. The Balanced Fund's portfolio turnover rate for the one-month period ended
July 31, 1998 was 4%, not annualized, and for the fiscal years ended July 31,
1999 and 2000 were 91% and 116% respectively.

Frequent changes in the Index Portfolio's holdings may result from the policy of
attempting to correlate the Index Portfolio's securities holdings with the
composition of the Social Index. The annual portfolio turnover rates of the
Index Portfolio for the fiscal years ended July 31, 1998, 1999 and 2000 were 5%,
8% and 9% respectively.


                                       17

<PAGE>   21

INVESTMENT RESTRICTIONS. As a matter of fundamental investment policy which
cannot be changed without shareholder approval, no more than 25% of the value of
each Fund's and the Index Portfolio's assets may be invested in any one industry
(excluding U.S. Government securities) although the Equity Fund will invest all
of its assets in the Index Portfolio, and the Index Portfolio may and would
invest more than 25% of its assets in an industry if stocks in that industry
were to comprise more than 25% of the Social Index. An industry must represent
25% or more of the Social Index before the Index Portfolio may invest more than
25% of its assets in that industry. If the Index Portfolio were to concentrate
its investments in a single industry, the Index Portfolio and the Equity Fund
would be more susceptible to risks associated with that industry than would a
fund which was not so concentrated. In addition, as a matter of fundamental
policy, the Equity Fund will invest all of its assets (either directly or
through the Index Portfolio) in one or more of: (i) stocks comprising an index
of securities selected applying social and environmental criteria (currently the
Social Index), (ii) short-term debt securities of issuers which meet social
criteria, (iii) cash, and (iv) options on equity securities. These fundamental
policies cannot be changed without the approval of the holders of a "majority of
the outstanding voting securities" (as defined in the Investment Company Act of
1940, as amended) of the Funds and the Index Portfolio. For further information
on fundamental and non-fundamental policies and restrictions, see the Statement
of Additional Information.

The investment objective of the Balanced Fund is not fundamental and may be
changed without the approval of the shareholders. The investment objectives of
the Equity Fund and the Index Portfolio also are not fundamental and may be
changed without the approval of the shareholders or investors if written notice
is provided to shareholders thirty days prior to implementing the change.
Because of the risks inherent in all investments, there can be no assurance that
the objectives of the Funds will be met. Except as stated otherwise, all
investment guidelines, policies and restrictions described here and in the
Statement of Additional Information are non-fundamental.

  FINANCIAL HIGHLIGHTS


The Financial Highlights table is intended to help you understand the Funds'
financial performance for the period of the Funds' operations. Certain
information reflects financial results for a single share of each Fund. The
total returns in the table represent the rate that an investor would have earned
(or lost) on an investment (assuming reinvestment of all dividends and
distributions). The information for the Balanced Fund for the three fiscal
periods ended June 30, 1998, the one month ended July 31, 1998 and the two
fiscal periods ended July 31, 2000 and for the Equity Fund for the period
September 13, 1995 (commencement of operations) to July 31, 1996 and for the
four fiscal periods ended July 31, 2000 has been audited by KPMG LLP, whose
report, along with the Fund's financial statements, are included in the Funds'
Annual Report which is available upon request.



                                       18

<PAGE>   22


GREEN CENTURY BALANCED FUND FINANCIAL HIGHLIGHTS



<TABLE>
<CAPTION>
                                                                                        FOR THE
                                                             FOR THE      FOR THE      ONE MONTH       FOR THE YEARS ENDED JUNE 30,
                                                          YEAR ENDED    YEAR ENDED       ENDED         ----------------------------
                                                         JULY 31, 2000 JULY 31, 1999  JULY 31, 1998    1998        1997      1996
<S>                                                      <C>           <C>           <C>              <C>        <C>        <C>
   NET ASSET VALUE, BEGINNING OF PERIOD..................  $  12.21    $  12.68        $  13.79       $ 13.53    $ 13.34    $11.03
                                                           --------    --------        --------       -------    -------    ------
   INCOME FROM INVESTMENT OPERATIONS:
      Net investment income..............................      0.07        0.11             --           0.02       0.12      0.10
      Net realized and unrealized gain (loss) on
       investments.......................................     11.35        0.40           (1.11)         1.68       1.77      2.31
                                                           --------    --------        --------       -------    -------    ------

      Total increase (decrease) from investment
       operations........................................     11.42        0.51           (1.11)         1.70       1.89      2.41
                                                           --------    --------        --------       -------    -------    ------
   LESS DIVIDENDS AND DISTRIBUTIONS (NOTE 1):
      Dividends from net investment income...............     (0.07)      (0.11)            --          (0.09)     (0.10)    (0.10)
      Distributions from net realized gains..............       --        (0.87)            --          (1.35)     (1.60)      --
                                                           --------    --------        --------       -------    -------    ------

      Total decrease from dividends and distributions....     (0.07)      (0.98)            --          (1.44)     (1.70)    (0.10)
                                                           --------    --------        --------       -------    -------    ------

   Net Asset Value, end of period........................  $  23.56    $  12.21        $  12.68       $ 13.79    $ 13.53    $13.34
                                                           ========    ========        ========       =======    =======    ======
   Total return..........................................     93.54%       4.93%          (8.05)%(a)    13.13%     15.22%    21.98%
   RATIOS/SUPPLEMENTAL DATA:
      Net assets, end of period (in 000's)...............  $ 55,081    $ 15,269        $ 15,212       $16,286    $11,022    $8,215
      Ratio of expenses to average net assets............      2.48%       2.50%           2.50%(b)      2.50%      2.50%     2.50%
      Ratio of net investment income to average net
       assets............................................      0.50%       1.00%           0.22%(b)      0.12%      0.94%     0.85%
      Portfolio turnover.................................       116%         91%              4%(a)        96%       109%      136%
</TABLE>



   (a)   Not annualized
   (b)   Annualized



GREEN CENTURY EQUITY FUND FINANCIAL HIGHLIGHTS



<TABLE>
<CAPTION>
                                                                                                              FOR THE PERIOD
                                                                                FOR THE YEARS               SEPTEMBER 13, 1995
                                                                                ENDED JULY 31,              (COMMENCEMENT OF
                                                               --------------------------------------------   OPERATIONS) TO
                                                                 2000       1999         1998        1997      JULY 31, 1996
<S>                                                            <C>         <C>          <C>         <C>     <C>
   NET ASSET VALUE, BEGINNING OF PERIOD......................  $ 24.62     $  20.44     $ 16.86     $11.04     $ 10.00
                                                               -------     --------     -------     ------     -------
   INCOME FROM INVESTMENT OPERATIONS:
      Net investment income (loss)...........................    (0.14)       (0.08)      (0.03)      0.02        0.02
      Net realized and unrealized gain on investment.........     2.02         4.47        3.62       5.84        1.04
                                                               -------     --------     -------     ------     -------
      Total increase from investment operations..............     1.88         4.39        3.59       5.86        1.06
                                                               -------     --------     -------     ------     -------
   LESS DIVIDENDS AND DISTRIBUTIONS:
      Dividends from net investment income...................      --           --          --       (0.03)      (0.02)
      Distributions from net realized gains..................    (0.08)       (0.21)      (0.01)     (0.01)        --
                                                               -------     --------     -------     ------     -------
      Total decrease from dividends and distributions........    (0.08)       (0.21)      (0.01)     (0.04)      (0.02)
                                                               -------     --------     -------     ------     -------
   Net Asset Value, end of period............................  $ 26.42     $  24.62     $ 20.44     $16.86     $ 11.04
                                                               =======     ========     =======     ======     =======
   Total return..............................................     7.62%       21.56%      21.32%     53.14%      10.64%(a)
   RATIOS/SUPPLEMENTAL DATA:
      Net Assets, end of period (in 000's)...................  $40,931     $  29,764    $15,476     $5,275     $   880
      Ratio of expenses to average net assets................     1.50%        1.50%       1.50%      1.50%       1.50%(b)
      Ratio of net investment income (loss) to average  net
       assets................................................    (0.59)%      (0.46)%     (0.26)%     0.07%       0.49%(b)
      Portfolio turnover (c).................................        9%           8%          5%         1%        n/a
</TABLE>



   (a)   Not annualized.
   (b)   Annualized.
   (c)   Represents portfolio turnover for the Index Portfolio.





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<PAGE>   25

INVESTMENT ADVISER (BALANCED FUND) AND ADMINISTRATOR
Green Century Capital Management, Inc.
29 Temple Place
Boston, MA 02111
1-800-93-GREEN

www.greencentury.com
email: [email protected]


INVESTMENT SUBADVISER (BALANCED FUND)
Winslow Management Company
60 State Street
Boston, MA 02109

INVESTMENT MANAGER (INDEX PORTFOLIO)
Domini Social Investments LLC

536 Broadway
New York, NY 10012


INVESTMENT SUBMANAGER (INDEX PORTFOLIO)
Mellon Equity Associates
500 Grant Street, Suite 3700
Pittsburgh, PA 15258

COUNSEL TO INDEPENDENT TRUSTEES OF THE FUNDS
Debevoise & Plimpton 555 13th
Street, N.W.
Washington, DC 20004


SUBADMINISTRATOR AND DISTRIBUTOR
Sunstone Financial Group, Inc. (Subadministrator)
Sunstone Distribution Services, LLC (Distributor)

803 West Michigan Street, Suite A
Milwaukee, WI 53233


CUSTODIAN
Investors Bank & Trust Company
200 Clarendon Street
Boston, MA 02116

TRANSFER AGENT
Unified Fund Services, Inc.
431 North Pennsylvania Street
Indianapolis, IN 46204-1806

COUNSEL TO GREEN CENTURY CAPITAL MANAGEMENT, INC.
Goulston & Storrs
400 Atlantic Avenue
Boston, MA 02110

INDEPENDENT AUDITORS
KPMG LLP
99 High Street
Boston, MA 02110


TO INVEST AND FOR ACCOUNT CORRESPONDENCE:
     Green Century Funds
     PO Box 6110
     Indianapolis, IN 46206-6110
     1-800-221-5519


A Statement of Additional Information about the Funds has been filed with the
Securities and Exchange Commission and is incorporated by reference in this
prospectus. Additional information about the Green Century Funds' investments is
available in the Funds' annual and semi-annual reports. The annual report
includes a discussion of the market conditions and investment strategies that
significantly affected each Fund's performance during its last fiscal year. To
obtain free copies of any of these documents or to make shareholder inquiries,
call 1-800-93-GREEN.

Fund reports and the Statement of Additional Information are also available from
the Securities and Exchange Commission website, www.sec.gov. Copies may be
obtained upon payment of a duplicating fee, by writing the SEC's Public
Reference Section, Washington DC 20549. You may also visit the SEC's public
reference room in Washington, D.C. For more information about the Public
Reference Room you may call the SEC at 1-800-SEC-0330.

[GREEN CENTURY FUNDS LOGO]


An Investment For Your Future.

811-06351
Printed on recycled paper with soy-based ink.


<PAGE>   26



STATEMENT OF ADDITIONAL INFORMATION

                               GREEN CENTURY FUNDS

             29 Temple Place, Suite 200, Boston, Massachusetts 02111


     Green Century Funds (the "Trust" or "the Funds" or "Green Century") offers
two separate series (each, a "Fund"), each with its own investment objective.
Each Fund pursues its respective investment objective through investments
consistent with the Trust's commitment to environmental responsibility. The
GREEN CENTURY BALANCED FUND (the "Balanced Fund") seeks capital growth and
income from a diversified portfolio of stocks and bonds. The GREEN CENTURY
EQUITY FUND (the "Equity Fund") seeks to provide its shareholders with long-term
total return which matches the performance of the "Domini Social Index(SM)" (the
"Social Index"), an index made up of the stocks of 400 companies selected using
environmental and social criteria. The Equity Fund seeks to achieve its
investment objective by investing all of its investable assets (the "Assets") in
the Domini Social Index Portfolio (the "Index Portfolio"), a diversified
open-end management investment company having the same investment objective as
the Equity Fund. The Index Portfolio invests in the common stocks included in
the Social Index. There can be no assurance that the investment objective of
either Fund will be achieved.

     This Statement of Additional Information is not a prospectus and should be
read in conjunction with the Trust's Prospectus dated November 28, 2000 a copy
of which may be obtained from the Trust at the address noted above or by
telephoning 1-800-93-GREEN. Terms used but not defined herein, but which are
defined in the Prospectus, are used as defined in the Prospectus.


     The following financial statements are incorporated by reference to the
Annual Report dated July 31, 2000, of Green Century Funds (File No. 811-06351)
as filed with the Securities and Exchange Commission on September 29, 2000.


     1.   Green Century Balanced Fund Portfolio of Investments
     2.   Green Century Balanced Fund Statement of Assets and Liabilities
     3.   Green Century Balanced Fund Statement of Operations
     4.   Green Century Balanced Fund Statements of Changes in Net Assets
     5.   Green Century Balanced Fund Financial Highlights
     6.   Green Century Equity Fund Statement of Assets and Liabilities
     7.   Green Century Equity Fund Statement of Operations
     8.   Green Century Equity Fund Statements of Changes in Net Assets
     9.   Green Century Equity Fund Financial Highlights
     10.  Notes to Financial Statements
     11.  Independent Auditors' Report
     12.  Domini Social Index Portfolio of Investments
     13.  Domini Social Index Portfolio Statement of Assets and Liabilities
     14.  Domini Social Index Portfolio Statement of Operations
     15.  Domini Social Index Portfolio Statements of Changes in Net Assets


                                       1


<PAGE>   27



     16.  Domini Social Index Portfolio Financial Highlights
     17.  Domini Social Index Portfolio Notes to Financial Statements
     18.  Independent Auditors' Report


Shareholders may obtain a copy of the Annual Report, without charge, by calling
1-800-93-GREEN

The date of this Statement of Additional Information is November 28, 2000.


Table of Contents                                                           Page
-----------------                                                           ----
The Green Century Funds ...................................................    3
Investment Objectives, Risks and Policies..................................    3
History of Green Century Funds and Green Century and
  Capital Management Shareholder Activism..................................   18
Investment Restrictions....................................................   22
Trustees and Officers......................................................   26
Investment Advisers and Managers...........................................   30
Administrator, Subadministrator, Transfer Agent and Custodian,
and Expenses...............................................................   36
Distribution Plan..........................................................   38
Financial Intermediaries ..................................................   38
Net Asset Value; Redemption in Kind........................................   39
Performance Advertising....................................................   41
Federal Taxes..............................................................   42
Description of Shares, Voting Rights and Liabilities.......................   44
Portfolio Transactions and Brokerage Commissions...........................   46
Independent Auditors and Experts...........................................   50
Additional Information.....................................................   50
Financial Statements.......................................................   51
Appendix - Description of Securities Ratings...............................   52





                                       2



<PAGE>   28



THE GREEN CENTURY FUNDS

The Green Century Funds is a diversified open-end management investment company
registered under the Investment Company Act of 1940, as amended (the "1940
Act"). The Trust was organized as a business trust under the laws of the
Commonwealth of Massachusetts on July 1, 1991.


INVESTMENT OBJECTIVES, RISKS AND POLICIES

     The following supplements the information contained in the Prospectus
concerning the investment objective, policies and techniques of the Funds and
the Index Portfolio.


                                  BALANCED FUND

     U.S. Government Agency Obligations--The Fund will invest in obligations
issued or guaranteed by U.S. Government agencies, authorities or
instrumentalities, some of which are backed by the full faith and credit of the
U.S. Government (i.e., direct pass-through certificates of the Government
National Mortgage Association ("GNMA")), some of which are supported by the
right of the issuer to borrow from the U.S. Government (i.e., obligations of the
Federal Home Loan Banks) and some of which are backed only by the credit of the
issuer itself (i.e., obligations of the Student Loan Marketing Association).

     Repurchase Agreements--Repurchase agreements may be entered into for the
Fund only with selected banks or broker-dealers. This is an agreement in which
the seller of a security agrees to repurchase from the Fund the security sold to
the Fund at a mutually agreed upon time and price. As such, it is viewed as the
lending of money to the seller of the security. The resale price normally is in
excess of the purchase price, reflecting an agreed upon interest rate. The rate
is effective for the period of time assets of the Fund are invested in the
agreement and is not related to the coupon rate on the underlying security. The
period of these repurchase agreements will usually be short, from overnight to
one week. The securities which are subject to repurchase agreements, however,
may have maturity dates in excess of one year from the effective date of the
repurchase agreement. The Fund will always receive as collateral securities
whose market value (which is marked to the market daily), including accrued
interest, will be at least equal to 100% of the dollar amount invested on behalf
of the Fund in each agreement along with accrued interest. Payment for such
securities will be made by the Fund only upon physical delivery or evidence of
book entry transfer to the account of the Trust's custodian. If the seller under
a repurchase agreement becomes insolvent, the Fund's right to dispose of the
securities may be restricted. In the event of the commencement of bankruptcy or
insolvency proceedings with respect to the seller of the security before
repurchase of the security under a repurchase agreement, the Fund may encounter
delay and incur costs before being able to sell the security. If the seller of
the security defaults, the Fund might incur a loss if the value of the
collateral securing the repurchase agreement declines and might incur
disposition costs in connection with liquidating the collateral. In addition, if
bankruptcy proceedings are commenced with respect to the seller of the security,
realization upon the collateral on behalf of the Fund may be delayed or limited
in certain circumstances. The seller of the security may also fail to repurchase
the obligations. Repurchase agreements are considered collateralized loans under
the 1940 Act.


                                       3


<PAGE>   29



     A repurchase agreement with more than seven days to maturity may not be
entered into for the Fund if, as a result, more than 15% of the market value of
the Fund's net assets would be invested in such repurchase agreements together
with any illiquid securities that the Fund may hold. The Balanced Fund has no
current intention to invest more than 5% of its net assets in repurchase
agreements.

     Certificates of Deposit--The Fund may invest in certificates of deposit of
large domestic or foreign banks (i.e., banks which at the time of their most
recent annual financial statements show total assets in excess of one billion
U.S. dollars or the equivalent thereof) and certificates of deposit of smaller
banks as described below. Although the Trust recognizes that the size of a bank
is important, this fact alone is not necessarily indicative of its
creditworthiness. Investment in certificates of deposit issued by foreign banks
or foreign branches of domestic banks involves investment risks that are
different in some respects from those associated with investment in certificates
of deposit issued by domestic banks, including the possible imposition of
withholding taxes on interest income, the possible adoption of foreign
governmental restrictions which might adversely affect the payment of principal
and interest on such certificates of deposit, or other adverse political or
economic developments. In addition, it might be more difficult to obtain and
enforce a judgment against a foreign bank or a foreign branch of a domestic
bank. (See "Foreign Securities".)

     The Fund may also invest in certificates of deposit issued by banks and
savings and loan institutions which had at the time of their most recent annual
financial statements total assets of less than one billion dollars, provided
that (i) the principal amounts of such certificates of deposit are insured by an
agency of the U.S. Government, (ii) at no time will the Fund hold more than
$100,000 principal amount of certificates of deposit of any one such bank, and
(iii) at the time of acquisition, no more than 10% of the Fund's assets (taken
at current value) are invested in certificates of deposit of such banks having
total assets not in excess of one billion dollars.

     When-Issued Securities-- The Fund may purchase securities offered on a
"when-issued" or "forward delivery" basis. When so offered, the price, which is
generally expressed in yield terms, is fixed at the time the commitment to
purchase is made, but delivery and payment for the when-issued or forward
delivery securities take place at a later date. During the period between
purchase and settlement, no payment is made by the purchaser to the issuer and
no interest on the when-issued or forward delivery security accrues to the
purchaser. While when-issued or forward delivery securities may be sold prior to
the settlement date, it is intended that the Fund will purchase such securities
with the purpose of actually acquiring them unless a sale appears desirable for
investment reasons. At the time the Fund makes the commitment to purchase a
security on a when-issued or forward delivery basis, it will record the
transaction and reflect the value of the security in determining its net asset
value. The market value of when-issued or forward delivery securities may be
more or less than the purchase price. The Trust does not believe that the Fund's
net asset value or income will be adversely affected by its purchase of
securities on a when-issued or forward delivery basis. The Fund will establish a
segregated account in which it will maintain cash, U.S. Government securities
and high-grade debt obligations equal in value to commitments for when-issued or
forward delivery securities.

     Mortgage-Backed Securities and Mortgage Pass-Through Securities-- The Fund
may also invest in mortgage-backed securities, which are interests in pools of
mortgage loans, including mortgage loans made by savings and loan institutions,
mortgage bankers, commercial banks and others. Pools of mortgage loans are
assembled as securities for sale to investors by various governmental,
government-related and private organizations as further described below.


                                       4


<PAGE>   30



     Unscheduled or early payments on the underlying mortgage may shorten the
securities' effective maturities and lessen their growth potential. The Fund may
agree to purchase or sell these securities with payment and delivery taking
place at a future date. A decline in interest rates may lead to a faster rate of
repayment of the underlying mortgages, and expose the Fund to a lower rate of
return upon reinvestment. To the extent that such mortgage-backed securities are
held by the Fund, the prepayment right will tend to limit to some degree the
increase in net asset value of the Fund because the value of the mortgage-backed
securities held by the Fund may not appreciate as rapidly as the price of
noncallable debt securities.

     Interests in pools of mortgage-backed securities differ from other forms of
debt securities, which normally provide for periodic payment of interest in
fixed amounts with principal payments at maturity or specified call dates.
Instead, these securities provide a monthly payment which consists of both
interest and principal payments. In effect, these payments are a "pass-through"
of the monthly payments made by the individual borrowers on their mortgage
loans, net of any fees paid to the issuer or guarantor of such securities.
Additional payments are caused by repayments of principal resulting from the
sale of the underlying property, refinancing or foreclosure, net of fees or
costs which may be incurred. Some mortgage-related securities (such as
securities issued by the Government National Mortgage Association) are described
as "modified pass-through." These securities entitle the holder to receive all
interest and principal payments owed on the mortgage pool, net of certain fees,
at the scheduled payment dates regardless of whether or not the mortgagor
actually makes the payment.

     The principal governmental guarantor of mortgage-related securities is the
Government National Mortgage Association ("GNMA"). GNMA is a wholly owned United
States Government corporation within the Department of Housing and Urban
Development. GNMA is authorized to guarantee, with the full faith and credit of
the United States Government, the timely payment of principal and interest on
securities issued by institutions approved by GNMA (such as savings and loan
institutions, commercial banks and mortgage bankers) and backed by pools of
FHA-insured or VA-guaranteed mortgages. These guarantees, however, do not apply
to the market value or yield of mortgage-backed securities or to the value of
Fund shares. Also, GNMA securities often are purchased at a premium over the
maturity value of the underlying mortgages. This premium is not guaranteed and
will be lost if prepayment occurs.

     Government-related guarantors (i.e., not backed by the full faith and
credit of the United States Government) include the Federal National Mortgage
Association ("FNMA") and the Federal Home Loan Mortgage Corporation ("FHLMC").
FNMA is a government-sponsored corporation owned entirely by private
stockholders. It is subject to general regulation by the Secretary of Housing
and Urban Development. FNMA purchases conventional (i.e., not insured or
guaranteed by any government agency) mortgages from a list of approved
seller/servicers which include state and federally chartered savings and loan
associations, mutual savings banks, commercial banks and credit unions and
mortgage bankers. Pass-through securities issued by FNMA are guaranteed as to
timely payment of principal and interest by FNMA but are not backed by the full
faith and credit of the United States Government.

     FHLMC is a corporate instrumentality of the United States Government and
was created by Congress in 1970 for the purpose of increasing the availability
of mortgage credit for residential housing. Its stock is owned by the twelve
Federal Home Loan Banks. FHLMC issues Participation Certificates ("PCs") which
represent interests in conventional mortgages from FHLMC's national portfolio.
FHLMC guarantees the timely payment of interest and ultimate collection of
principal, but PCs are not backed by the full faith and credit of the United
States Government.


                                       5


<PAGE>   31



     Commercial banks, savings and loan institutions, private mortgage insurance
companies, mortgage bankers and other secondary market issuers also create
pass-through pools of conventional mortgage loans. Such issuers may, in
addition, be the originators and/or servicers of the underlying mortgage loans
as well as the guarantors of the mortgage-related securities. Pools created by
such nongovernmental issuers generally offer a higher rate of interest than
government and government-related pools because there are no direct or indirect
government or agency guarantees of payments. However, timely payment of interest
and principal of these pools may be supported by various forms of insurance or
guarantees, including individual loan, title, pool and hazard insurance and
letters of credit. The insurance and guarantees are issued by governmental
entities, private insurers and the mortgage poolers. Such insurance and
guarantees and the creditworthiness of the issuers thereof will be considered in
determining whether a mortgage-related security meets the Fund's investment
quality standards. There can be no assurance that the private insurers or
guarantors can meet their obligations under the insurance policies or guarantee
arrangements. The Fund may buy mortgage-related securities without insurance or
guarantees, if through an examination of the loan experience and practices of
the originators/servicers and poolers, the Fund's investment adviser and
investment subadviser determine that the securities meet the Fund's quality
standards. Although the market for such securities is becoming increasingly
liquid, securities issued by certain private organizations may not be readily
marketable.

     Foreign Currencies--Investments in foreign securities usually will involve
currencies of foreign countries. Moreover, the Fund temporarily may hold funds
in bank deposits in foreign currencies during the completion of investment
programs and may purchase forward foreign currency contracts, foreign currency
futures contracts and options on such contracts. Because of these factors, the
value of the assets of the Fund as measured in U.S. dollars may be affected
favorably or unfavorably by changes in foreign currency exchange rates and
exchange control regulations, and the Fund may incur costs in connection with
conversions between various currencies. Although the Fund values its assets
daily in terms of U.S. dollars, it does not intend to convert its holdings of
foreign currencies into U.S. dollars on a daily basis. It will do so from time
to time, and investors should be aware of the costs of currency conversion.
Although foreign exchange dealers do not charge a fee for conversion, they do
realize a profit based on the difference (the "spread") between the prices at
which they are buying and selling various currencies. Thus, a dealer may offer
to sell a foreign currency to the Fund at one rate, while offering a lesser rate
of exchange should the Fund desire to resell that currency to the dealer. 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 currency exchange
market, or through entering into forward or futures contracts to purchase or
sell foreign currencies.

     Because the Balanced Fund may be invested in both U.S. and foreign
securities markets, changes in the Fund's share price will not be correlated
with movements in the U.S. markets. The Fund's share price will reflect the
movements of both the different stock and bond markets in which it is invested
and of the currencies in which the investments are denominated; the strength or
weakness of the U.S. dollar against foreign currencies may account for part of
the Fund's investment performance. U.S. and foreign securities markets do not
always move in step with each other, and the total returns from different
markets may vary significantly. The Fund may invest in many securities markets
around the world in an attempt to take advantage of opportunities wherever they
may arise.

     Floating Rate Obligations--Certain of the obligations that the Fund may
purchase have a floating or variable rate of interest. Such obligations bear
interest at rates that are not fixed, but which vary with changes in specific
market rates or indices, such as the Prime Rate, and at specified intervals.
Certain of such


                                       6


<PAGE>   32
obligations may carry a demand feature that would permit the holder to tender
them back to the issuer at par value prior to maturity.

     Because of the variable rate nature of such instruments, the yield of the
Fund will decline and its shareholders will forego the opportunity for capital
appreciation during periods when prevailing interest rates have declined. On the
other hand, during periods where prevailing interest rates have increased, the
Fund's yield will increase and its shareholders will have reduced risk to
capital depreciation.

     Zero Coupon Securities--The Fund may invest in zero coupon securities which
pay no cash income and are sold at substantial discounts from their value at
maturity. Principal and accrued discount (representing interest accrued but not
paid) are paid at maturity. Zero coupon securities include so-called "stripped"
U.S. Treasury obligations as well as privately issued securities which are
issued by a bank or a securities firm that has purchased U.S. Treasury
obligations and separated their interest and principal components. When held to
maturity, their entire income, which consists of accretion of discount, comes
from the difference between the purchase price and their value at maturity. Zero
coupon securities are subject to greater market value fluctuations from changing
interest rates than debt obligations of comparable maturities which make current
distributions of interest (cash). Zero coupon convertible securities offer the
opportunity for capital appreciation as increases (or decreases) in market value
of such securities closely follows the movements in the market value of the
underlying common stock. Zero coupon convertible securities generally are
expected to be less volatile than the underlying common stocks as they usually
are issued with short maturities (15 years or less) and are issued with options
and/or redemption features exercisable by the holder of the obligation entitling
the holder to redeem the obligation and receive a defined cash payment.

     Zero coupon securities include securities issued directly by the U.S.
Treasury, and U.S. Treasury bonds or notes and their unmatured interest coupons
and receipts for their underlying principal ("coupons") which have been
separated by their holder, typically a custodian bank or investment brokerage
firm. A holder will separate the interest coupons from the underlying principal
(the "corpus") of the U.S. Treasury security. A number of securities firms and
banks have stripped the interest coupons and receipts and then resold them in
custodial receipt programs with a number of different names, including "Treasury
Income Growth Receipts" ("TIGRS") and Certificate of Accrual on Treasuries
("CATS"). The underlying U.S. Treasury bonds and notes themselves are held in
book-entry form at the Federal Reserve Bank or, in the case of bearer securities
(i.e., unregistered securities which are owned ostensibly by the bearer or
holder thereof), in trust on behalf of the owners thereof. Counsel to the
underwriters of these certificates or other evidences of ownership of the U.S.
Treasury securities has stated that for federal tax and securities purposes, in
their opinion purchasers of such certificates, such as the Funds, most likely
will be deemed the beneficial holder of the underlying U.S. Government
securities. The Fund understands that the staff of the Division of Investment
Management of the Securities and Exchange Commission ("SEC") no longer considers
such privately stripped obligations to be U.S. Government securities, as defined
in the 1940 Act; therefore, the Fund intends to adhere to this staff position
and will not treat such privately stripped obligations to be U.S. Government
securities for the purpose of determining if the Fund is "diversified," or for
any other purpose, under the 1940 Act.

     The Treasury has facilitated transfers of ownership of zero coupon
securities by accounting separately for the beneficial ownership of particular
interest coupon and corpus payments on Treasury securities through the Federal
Reserve book-entry record-keeping system. The Federal Reserve program as
established by the Treasury Department is known as "STRIPS" or "Separate Trading
of Registered Interest and Principal of Securities." Under the STRIPS program,
the Fund will be able to have its beneficial ownership of zero coupon


                                       7


<PAGE>   33



securities recorded directly in the book-entry record-keeping system in lieu of
having to hold certificates or other evidences of ownership of the underlying
U.S. Treasury securities.

     When U.S. Treasury obligations have been stripped of their unmatured
interest coupons by the holder, the principal or corpus is sold at a deep
discount because the buyer receives only the right to receive a future fixed
payment on the security and does not receive any rights to periodic interest
(cash) payments. Once stripped or separated, the corpus and coupons may be sold
separately. Typically, the coupons are sold separately or grouped with other
coupons with like maturity dates and sold in such bundled form. Purchasers of
stripped obligations acquire, in effect, discount obligations that are
economically identical to the zero coupon securities that the Treasury sells
itself.

     Equity Investments--Equity investments may or may not pay dividends and may
or may not carry voting rights. Common stock occupies the most junior position
in a company's capital structure. Convertible securities entitle the holder to
exchange the securities for a specified number of shares of common stock,
usually of the same company, at specified prices within a certain period of time
and to receive interest or dividends until the holder elects to convert. The
provisions of any convertible security determine its ranking in a company's
capital structure. In the case of subordinated convertible debentures, the
holder's claims on assets and earnings are subordinated to the claims of other
creditors, and are senior to the claims of preferred and common shareholders. In
the case of preferred stock and convertible preferred stock, the holder's claims
on assets and earnings are subordinated to the claims of all creditors but are
senior to the claims of common shareholders. By investing in convertible
securities, the Fund seeks the opportunity, through the conversion feature, to
participate in a portion of the capital appreciation of the common stock into
which the securities are convertible, while earning higher current income than
is available from common stock. The value of convertible securities may reflect
changes in the value of the underlying common stock. Convertible securities
entail less credit risk than the issuer's common stock because they rank senior
to common stock.

     Debt Securities--The Fund may invest in debt securities of foreign and U.S.
issuers. The Fund's debt investments may be selected on the basis of capital
appreciation potential, by evaluating, among other things, potential yield, if
any, credit quality, and the fundamental outlooks for currency and interest rate
trends in different parts of the globe, taking into account the ability to hedge
a degree of currency or local bond price risk.


Risks Related to Lower-Rated Securities

     The Fund's investments in high yield, high risk debt obligations rated
below investment grade, which have speculative characteristics, bear special
risks. They are subject to greater credit risks, including the possibility of
default or bankruptcy of the issuer. The value of such investments may also be
subject to a greater degree of volatility in response to interest rate
fluctuations, economic downturns and changes in the financial condition of the
issuer. These securities generally are less liquid than higher quality
securities. During periods of deteriorating economic conditions and contractions
in the credit markets, the ability of such issuers to service their debt, meet
projected goals or obtain additional financing may be impaired. The Fund will
also take such action as it considers appropriate in the event of anticipated
financial difficulties, default or bankruptcy of either the issuer of any such
obligation or of the underlying source of funds for debt service. Such action
may include retaining the services of various persons and firms (including
affiliates of the investment adviser and investment subadviser) to evaluate or
protect any real estate or other assets securing any such obligation or acquired
by the Fund as a result of any such event. The Fund will incur additional
expenditures in taking protective action with respect to portfolio obligations
in default and assets securing such obligations.


                                       8






<PAGE>   34
         While any investment carries some risk, certain risks associated with
lower-rated securities are different from those for investment-grade securities.
The risk of loss through default is greater because lower-rated securities are
usually unsecured and are often subordinate to an issuer's other obligations.
Additionally, the issuers of these securities frequently have high debt levels
and are thus more sensitive to difficult economic conditions, individual
corporate developments and rising interest rates. Consequently, the market price
of these securities may be quite volatile and may result in wider fluctuations
of the Fund's net asset value per share.

         There remains some uncertainty about the performance level of the
market for lower-rated securities under adverse market and economic
environments. An economic downturn or increase in interest rate could have a
negative impact on both the markets for lower-rated securities (resulting in a
greater number of bond defaults) and the value of lower-rated securities held in
the portfolio of investments.

         The economy and interest rates can affect lower-rated securities
differently than other securities. For example, the prices of lower-rated
securities are more sensitive to adverse economic changes or individual
corporate developments than are the prices of higher-rated investments. In
addition, during an economic downturn or period in which interest rates are
rising significantly, highly leveraged issuers may experience financial
difficulties, which, in turn, would adversely affect their ability to service
their principal and interest payment obligations, meet projected business goals
and obtain additional financing.

         If an issuer of a security defaults, the Fund may incur additional
expenses to seek recovery. In addition, periods of economic uncertainty would
likely result in increased volatility for the market prices of lower-rated
securities as well as the Fund's net asset value. In general, both the prices
and yields of lower-rated securities will fluctuate.

         In certain circumstances it may be difficult to determine a security's
fair value due to a lack of reliable objective information. Such instances occur
where there is not an established secondary market for the security or the
security is lightly traded. As a result the Fund's valuation of a security and
the price it is actually able to obtain when it sells the security could differ.

         Adverse publicity and investor perceptions, whether or not based on
fundamental analysis, may decrease the value and liquidity of lower-rated
securities held by the Fund, especially in a thinly traded market. Illiquid or
restricted securities held by the Fund may involve special registration
responsibilities, liabilities and costs, and could involve other liquidity and
valuation difficulties.


                                       9
<PAGE>   35


         Current laws, such as those requiring federally-insured savings and
loan associations to remove investments in lower-rated securities from their
portfolios, as well as other pending proposals, may have a material impact on
the market for lower-rated securities.

         The ratings assigned by a rating agency evaluates the safety of
lower-rated security's principal and interest payments, but does not address
market value risk. Because the ratings of the rating agencies may not always
reflect current conditions and events, in addition to using recognized rating
agencies and other sources, the subadviser performs its own analysis of the
issuers whose lower-rated securities the Fund holds. Because of this, the Fund's
performance may depend more on the subadviser's credit analysis than is the case
of mutual funds investing in higher-rated securities.

         Options on Securities-- For hedging purposes and to increase income,
the Balanced Fund may write (sell) covered (under Securities and Exchange
Commission regulations) call and put options on individual securities and on
stock indices and may engage in related closing transactions. Options trading is
a highly specialized activity that entails greater than ordinary investment
risks. Risks associated with writing covered options include the possible
inability to effect closing transactions at favorable prices; an appreciation
limit on the securities set aside for settlement; losses caused by unanticipated
market movements; and the Subadviser's ability to predict correctly the
direction of securities prices, interest rates, currency exchange rates and
other economic factors.

         The Fund may terminate its obligation as the writer of a call or put
option by purchasing an option with the same exercise price and expiration date
as the option previously written. This transaction is called a "closing purchase
transaction." Where the Fund cannot effect a closing purchase transaction, it
may be forced to incur brokerage commissions or dealer spreads in selling
securities it receives or it may be forced to hold underlying securities until
an option is exercised or expires.

         The hours of trading for options on securities may not conform to the
hours during which the underlying securities are traded. To the extent that the
option markets close before the markets for the underlying securities,
significant price and rate movements can take place in the underlying securities
markets that cannot be reflected in the option markets. It is impossible to
predict the volume of trading that may exist in such options, and there can be
no assurance that viable exchange markets will develop or continue.

         The Fund may engage in over-the-counter options transactions with
broker-dealers who make markets in these options. At present, approximately ten
broker-dealers, including several of the largest primary dealers in U.S.
Government securities, make these markets. The ability to terminate
over-the-counter option positions is more limited than with exchange-traded
option positions because the predominant market is the issuing broker rather
than an exchange, and may involve the risk that broker-dealers participating in
such transactions will not fulfill their obligations. To reduce this risk, the
Fund will purchase such options only from broker-dealers who are primary
government securities dealers recognized by the Federal Reserve Bank of New York
and who agree to (and are expected to be capable of) entering into closing
transactions, although there can be no guarantee that any such option will be
liquidated at a favorable price prior to expiration. The investment adviser and
investment subadviser will monitor the creditworthiness of dealers with whom the
Fund enters into such options transactions under the general supervision of the
Trust's Trustees.

         Options on Securities Indices--In addition to options on securities,
the Fund may also purchase and write (sell) call and put options on securities
indices. The absence of a liquid secondary market to close out

                                       10
<PAGE>   36

options positions on securities indices is more likely to occur, although the
Fund generally will only purchase or write such an option if the investment
adviser and investment subadviser believe the option can be closed out. Use of
options on securities indices also entails the risk that trading in such options
may be interrupted if trading in certain securities included in the index is
interrupted. The Fund will not purchase such options unless its investment
adviser and investment subadviser believe the market is sufficiently developed
such that the risk of trading in such options is no greater than the risk of
trading in options on securities. Price movements in the Fund's portfolio may
not correlate precisely with movements in the level of an index and, therefore,
the use of options on indices cannot serve as a complete hedge. Because options
on securities indices require settlement in cash, the Fund may be forced to
liquidate portfolio securities to meet settlement obligations.

         Options on Currencies--The Fund may write (sell) call and put options
on currencies to increase gain and may purchase such options to hedge the value
of securities the Fund holds or intends to buy. Purchased currency options may
be denominated in a currency that is linked to the currency the Fund owns or may
wish to purchase. This technique, referred to as "proxy hedging," involves the
additional risk that the linkage between the currencies may be changed or
eliminated.

         Futures Contracts--The Fund may enter into futures contracts on
securities, currencies and indices which are traded on exchanges that are
licensed and regulated by the Commodity Futures Trading Commission ("CFTC") or,
consistent with CFTC regulations, on foreign exchanges. The Fund will do so to
hedge against anticipated changes in securities values, as a substitute for the
purchase or sale of securities or currencies or to enhance return.

         For bona fide hedging or other permissible risk management purposes,
such as protecting the price or interest rate of a security it intends to buy,
the Balanced Fund may enter into interest-rate, securities-index and currency
futures contracts and may purchase and write put and call options on these
futures contracts. Futures contracts obligate the Fund, at maturity, to take or
make delivery of certain securities, the cash value of a securities index or a
stated quantity of a foreign currency. The Fund may lose the expected benefit of
futures transactions if securities prices or interest rates move in an
unanticipated manner. Such unanticipated changes may also result in poorer
overall performance than if the Fund had not entered into any futures
transactions. In addition, changes in the value of the Fund's futures and
options positions may not prove to be perfectly or even highly correlated with
changes in the value of its portfolio securities. This could limit the Fund's
ability to hedge effectively against interest-rate and/or market risk and give
rise to additional risks.

         To the extent that the Fund enters into futures contracts, options on
futures contracts and options on foreign currencies traded on an exchange
regulated by the CFTC, in each case that are not for bona fide hedging purposes
(as defined by the CFTC), the aggregate initial margin and premiums required to
establish these positions (excluding the amount by which options are
"in-the-money") may not exceed 5% of the liquidation value of the Fund's
portfolio, after taking into account unrealized profits and unrealized losses on
any contracts the Fund has entered into.

         The Fund may also purchase and write call and put options on futures
contracts which are traded on exchanges that are licensed and regulated by the
CFTC, or, consistent with CFTC regulations, on foreign exchanges.

                                       11
<PAGE>   37

         While the holder or writer of an option on a futures contract may
normally terminate its position by selling or purchasing an offsetting option of
the same series, the Fund's ability to establish and close out options positions
at fairly established prices will be subject to the existence of a liquid
market. The Fund will not purchase or write options on futures contracts unless,
in the opinion of the Fund's Adviser and Subadviser, the market for such options
has sufficient liquidity that the risks associated with such options
transactions are not at unacceptable levels.

         While futures contracts will be traded to reduce certain risks, futures
trading itself entails certain other risks. Unanticipated changes in securities
values, interest rates or currency prices may result in a poorer overall
performance for the Fund than if it had not entered into any futures contracts.
Some futures contracts may not have a broad and liquid market, in which case the
contracts may not be able to be closed at a fair price and the Fund may lose in
excess of the initial margin deposit. Moreover, in the event of an imperfect
correlation between the futures contract and the portfolio position which is
intended to be protected, the desired protection may not be obtained and the
Fund may be exposed to risk of loss.

         The Fund will incur brokerage costs and will be required to post and
maintain "margin" as a good-faith deposit against performance of its obligations
under futures contracts and under options written by the Fund. In addition, the
Fund is required to segregate assets, such as liquid securities and cash, in an
amount equal to the value of the instruments underlying futures contracts and
call options purchased and put options written by the Fund.

         Forward Currency Exchange Contracts-- In an attempt to manage currency
risk, the Balanced Fund may purchase and sell forward foreign currency exchange
contracts, options on currencies and other currency instruments with respect to
5% of its assets. A forward currency exchange contract ("forward 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 contract
generally has no deposit requirement, and no commissions are charged at any
stage for trades.

         While the Fund will enter into forward and futures contracts to reduce
currency exchange rate risks, transactions in such contracts involve certain
other risks. Thus, while the Fund may benefit from such transactions,
unanticipated changes in currency prices may result in a poorer overall
performance for the Fund than if it had not engaged in any such transaction.
Moreover, there may be an imperfect correlation between the Fund's portfolio
holdings of securities denominated in a particular currency and forward or
futures contracts entered into by the Fund. Such imperfect correlation may
prevent the Fund from achieving a complete hedge or expose the Fund to risk of
foreign exchange loss.

         Combined Transactions--The Fund may enter into multiple transactions,
including multiple options transactions, multiple futures transactions, multiple
foreign currency transactions (including forward foreign currency exchange
contracts) and any combination of futures, options and foreign currency
transactions ("component" transactions), instead of a single transaction, as
part of a single hedging strategy when, in the opinion of the investment adviser
and investment subadviser, it is in the best interest of the Fund to do so. A
combined transaction, while part of a single hedging strategy, may contain
elements of risk that are present in each of its component transactions.

                                       12
<PAGE>   38

         Use of Segregated and Other Special Accounts--Options, futures and
forward foreign currency transactions which obligate the Fund to provide cash,
securities or currencies to complete such transactions will entail the Fund
either segregating assets in an account with, or on the books of, the Custodian
to the extent the Fund does not own the securities, or the securities
denominated in the currency, which are the subject of the obligation, or
otherwise "covering" the transaction as allowed under interpretive positions of
the SEC. For example, a call option written by the Fund will require the Fund to
hold the securities subject to the call (or securities convertible into the
needed securities without additional consideration) or to segregate high grade
liquid debt obligations sufficient to meet the obligation by purchasing and
delivering the securities if the call is exercised. A call option written on an
index will require the Fund to have portfolio securities which correlate with
the index or to segregate such high grade liquid assets. A put option written by
the Fund also will require the Fund to segregate such high grade liquid assets
sufficient to cover the Fund's obligation to buy the securities covered by the
put if the put is exercised.

         Except when the Fund enters into a forward contract for the purpose of
the purchase or sale of a security denominated in a foreign currency, a forward
foreign currency contract which obligates the Fund to provide currencies will
require the Fund to hold currencies or liquid securities denominated in that
currency which will equal the Fund's obligations. Such a contract requiring the
purchase of currencies also requires segregation.

         Unless the Fund owns or maintains a segregated account consisting of
the securities, cash or currencies which are the subject of the obligation as
described above, the Fund will hold liquid assets in a segregated account. These
assets cannot be transferred while the obligation is outstanding unless replaced
with other suitable assets. Rather than segregating assets in the case of an
index-based transaction, the Fund could own securities substantially replicating
the movement of the particular index.

         In the case of a futures contract, the Fund, apart from its duty to
segregate, must deposit initial margin and variation margin, as often as daily
if the position moves adversely, sufficient to meet its obligation to purchase
or provide securities or currencies, or to pay the amount owed at the expiration
of an index-based futures contract. Similarly, options on futures contracts
require margin to the extent necessary to meet the Fund's commitments.

         In lieu of such procedures, such transactions may be covered by other
means, consistent with applicable regulatory policies. The Fund may enter into
certain offsetting transactions so that its combined position, coupled with any
segregated assets, equals its net outstanding obligation in related options and
hedging transactions. For example, the Fund could purchase a put option if the
strike price of that option is the same or higher than the strike price of a put
option sold by the Fund. Moreover, instead of segregating assets if the Fund
held a futures or forward contract, it could purchase a put option on the same
futures or forward contract with a strike price as high or higher than the price
of the contract held. Of course, the offsetting transaction must terminate at
the time of or after the primary transaction.

         Other Mortgage-Backed Securities--. The Balanced Fund may invest in
mortgage-backed securities which are securities that directly or indirectly
represent an interest in an underlying pool of mortgages. Unlike ordinary
fixed-income securities, which generally pay a fixed rate of interest and return
principal upon maturity, mortgage-backed securities repay both interest income
and principal as part of their periodic payments. Because the mortgages
underlying mortgage-backed certificates can be prepaid at any time by homeowners
or corporate borrowers, mortgage-backed securities give rise to certain unique

                                       13
<PAGE>   39

"pre-payment" risks, as well as market risks and financial risks. The Fund may
invest in mortgage-backed securities issued or guaranteed by an agency or
instrumentality of the U.S. Government. Mortgage-backed securities that are
guaranteed by the U.S. Government are guaranteed only as to the timely payment
of principal and interest. The market value of such securities is not guaranteed
and may fluctuate. Governmental, government-related or private entities may
create mortgage loan pools and other mortgage-related securities offering
mortgage pass-through and mortgage-collateralized investments in addition to
those described above. The mortgages underlying these securities may include
alternative mortgage instruments, that is, mortgage instruments whose principal
or interest payments may vary or whose terms to maturity may differ from
customary long-term fixed rate mortgages. As new types of mortgage-related
securities are developed and offered to investors, the investment adviser and
investment subadviser will, consistent with the Fund's investment objective,
policies and quality standards, consider making investments in such new types of
mortgage-related securities. The Fund will not purchase any such other
mortgage-backed securities until the Trust's Prospectus and this Statement of
Additional Information have been supplemented.

                                   EQUITY FUND

         The Equity Fund seeks to achieve its investment objective by investing
all its Assets in the Index Portfolio, which has the same investment objective
as the Equity Fund. The Index Portfolio seeks to achieve its investment
objective by investing in the common stocks comprising the Social Index. The
Equity Fund's policy is to invest at least 80% of its Assets (either directly or
through the Index Portfolio) in the stocks comprising the Social Index.

         In selecting stocks for inclusion in the Social Index:


         1. Kinder, Lydenberg & Domini & Co., Inc. ("KLD") evaluated, in
accordance with the social criteria described in the Prospectus, each of the
companies the stocks of which comprise the Standard & Poor's 500 Composite Stock
Price Index (the "S&P 500"). If a company whose stock was included in the S&P
500 met KLD's social criteria and met its further criteria for industry
diversification, financial solvency, market capitalization, and minimal
portfolio turnover, it was included in the Social Index. As of July 31, 2000, of
the 500 companies whose stocks comprised the S&P 500, approximately 58.5% were
included in the Social Index.

         2. The remaining stocks comprising the Social Index (i.e., those which
are not included in the S&P 500) were selected based upon KLD's evaluation of
the social criteria described in the Prospectus, as well as upon its criteria
for industry diversification, financial solvency, market capitalization, and
minimal portfolio turnover. Because of the social criteria applied in the
selection of stocks comprising the Social Index, industry sector weighting in
the Social Index may vary materially from the industry weightings in other stock
indices, including the S&P 500, and certain industry sectors will be excluded
altogether.

         KLD may exclude from the Social Index stocks issued by companies which
are in bankruptcy or whose bankruptcy KLD believes may be imminent.

         The component stocks of the S&P 500 are chosen by Standard & Poor's
Corporation ("S&P") solely with the aim of achieving a distribution by broad
industry groupings that approximates the distribution of these groupings in the
New York Stock Exchange common stock population, taken as the assumed model for
the composition of the total market. Construction of the S&P 500 by S&P proceeds
from industry groups to the whole. Since some industries are characterized by
companies of relatively small stock capitalization, the S&P


                                       14
<PAGE>   40

500 does not comprise the 500 largest companies listed on the New York Stock
Exchange. Not all stocks included in the S&P 500 are listed on the New York
Stock Exchange. However, the total market value of the S&P 500 as of July 31,
2000 represented approximately 67.9% of the aggregate market value of common
stocks traded on the New York Stock Exchange.

         Inclusion of a stock in the S&P 500 Index in no way implies an opinion
by S&P as to its attractiveness as an investment, nor is S&P a sponsor of or
otherwise affiliated with the Equity Fund or the Index Portfolio. "S&P 500" is a
trademark of S&P. A company which is not included in the S&P 500 may be included
in the Social Index primarily in order to afford representation to an industrial
sector which would otherwise be under-represented in the Social Index.

         The weightings of stocks in the Social Index are based on each stock's
relative total market capitalization, (i.e., market price per share times the
number of shares outstanding.) Because of this weighting, as of August 31, 2000
approximately 54.7% of the Social Index was comprised of the 20 largest
companies in that Index.


         The Index Portfolio intends to readjust its securities holdings
periodically such that those holdings will correspond, to the extent reasonably
practicable, to the Social Index both in terms of composition and weighting. The
timing and extent of adjustments in the holdings of the Index Portfolio, and the
extent of the correlation of the holdings of the Index Portfolio with the Social
Index, will reflect the Index Portfolio's submanager's judgment as to the
appropriate balance as between the goal of correlating its holdings with the
composition of the Social Index and the goals of minimizing transaction costs
and keeping sufficient reserves available for anticipated redemptions of shares.
To the extent practicable, the Index Portfolio will seek a correlation between
the weightings of securities held by the Index Portfolio to the weightings of
the securities in the Social Index of 0.95 or better. The Board of Trustees of
the Index Portfolio will receive and review, at least quarterly, a report
prepared by the Submanager comparing the performance of the Index Portfolio with
that of the Social Index, and comparing the composition and weighting of the
Index Portfolio's holdings with those of the Social Index, and will consider
what action, if any, should be taken in the event of a significant variation
between the performance of the Equity Fund or the Index Portfolio, as the case
may be, and that of the Social Index, or between the composition and weighting
of the Index Portfolio's securities holdings with those of the stocks comprising
the Social Index. If the correlation between the weightings of securities held
by the Index Portfolio and the weightings of the stocks in the Social Index
falls below 0.95, the Board of Trustees of the Index Portfolio will review, with
the Submanager of the Index Portfolio methods for increasing such correlation,
such as through adjustments in securities holdings of the Index Portfolio. To
the extent practicable, the Index Portfolio will attempt to be fully invested.

         Securities Subject to Taxation: With respect to stocks of foreign
issuers, the Index Portfolio does not purchase securities which the Index
Portfolio believes, at the time of purchase, will be subject to exchange
controls or foreign withholding taxes; however, there can be no assurance that
such laws may not become applicable to certain of the Index Portfolio's
investments. In the event unforeseen exchange controls or foreign withholding
taxes are imposed with respect to any of the Index Portfolio's investments, the
effect may be to reduce the income received by the Index Portfolio on such
investments.

         Rule 144A Securities: Although neither the Equity Fund nor the Index
Portfolio has any current intention to do so, each may invest in securities
which may be resold pursuant to Rule 144A under the Securities Act of 1933, as
amended (the "1933 Act").

                                       15
<PAGE>   41

         Option Contracts: Although it has no current intention to do so, the
Index Portfolio may in the future enter into certain transactions in stock
options for the purpose of hedging against possible increases in the value of
securities which are expected to be purchased by the Index Portfolio or possible
declines in the value of securities which are expected to be sold by the Index
Portfolio. Generally, the Index Portfolio would only enter into such
transactions on a short-term basis pending readjustment of its holdings of
underlying stocks.

         The purchase of an option on an equity security provides the holder
with the right, but not the obligation, to purchase the underlying security, in
the case of a call option, or to sell the underlying security, in the case of a
put option, for a fixed price at any time up to a stated expiration date. The
holder is required to pay a non-refundable premium, which represents the
purchase price of the option. The holder of an option can lose the entire amount
of the premium, plus related transaction costs, but not more. Upon exercise of
the option, the holder is required to pay the purchase price of the underlying
security in the case of a call option, or deliver the security in return for the
purchase price in the case of a put option.

         Prior to exercise or expiration, an option position may be terminated
only by entering into a closing purchase or sale transaction. This requires a
secondary market on the exchange on which the position was originally
established. While the Index Portfolio would establish an option position only
if there appears to be a liquid secondary market therefor, there can be no
assurance that such a market will exist for any particular option contract at
any specific time. In that event, it may not be possible to close out a position
held by the Index Portfolio, and the Index Portfolio could be required to
purchase or sell the instrument underlying an option, make or receive a cash
settlement or meet ongoing variation margin requirements. The inability to close
out option positions also could have an adverse impact on the Index Portfolio's
ability effectively to hedge its portfolio.

         Each exchange on which option contracts are traded has established a
number of limitations governing the maximum number of positions which may be
held by a trader, whether acting alone or in concert with others. The investment
adviser of the Index Portfolio does not believe that these trading and position
limits would have an adverse impact on the possible use of hedging strategies by
the Index Portfolio.

         Short Sales: Although it has no current intention to do so, the Index
Portfolio may make short sales of securities or maintain a short position, if at
all times when a short position is open the Index Portfolio owns an equal amount
of such securities, or securities convertible into such securities.

                          BALANCED FUND AND EQUITY FUND

         Foreign Securities-- Diversification of assets on a global basis
decreases the degree to which events in any one country, including the United
States, will affect an investor's entire investment holdings. In the period
since World War II, many leading foreign economies have grown more rapidly than
the United States economy, providing investment opportunities, although there
can be no assurance that this will be true in the future. As with any long-term
investment, the value of shares when sold may be higher or lower than when
purchased.

         Investors should recognize that investing in foreign securities
involves certain risk factors, including those set forth below, which are not
typically associated with investing in United States securities and which may
affect the Funds' performance favorably or unfavorably. Many foreign stock
markets, while growing in

                                       16
<PAGE>   42

volume of trading activity, have substantially less volume than the New York
Stock Exchange, and securities of some foreign companies are less liquid and
more volatile than securities of domestic companies. Similarly, volume and
liquidity in most foreign bond markets is less than that in the United States
market and at times, volatility of price can be greater than in the United
States. Further, foreign markets have different clearance and settlement
procedures and in certain markets there have been times when settlements have
been unable to keep pace with the volume of securities transactions making it
difficult to conduct such transactions. Delays in settlement could result in
temporary periods when assets of a Fund are uninvested and no return is earned
thereon. The inability of a Fund to make intended security purchases due to
settlement problems could cause the Fund to miss attractive investment
opportunities. Inability to dispose of portfolio securities due to settlement
problems either could result in losses to a Fund due to subsequent declines in
value of the portfolio security or, if the Fund has entered into a contract to
sell the security, could result in possible liability to the purchaser. Fixed
commissions on some foreign stock exchanges are generally higher than negotiated
commissions on U.S. exchanges, although the Funds will endeavor to achieve the
most favorable net results on portfolio transactions. Further, the Funds may
encounter difficulties or be unable to pursue legal remedies and obtain judgment
in foreign courts. There is generally less government supervision and regulation
of business and industry practices, stock exchanges, brokers and listed
companies than in the United States. It may be more difficult for the Funds'
agents to keep currently informed about corporate actions such as stock
dividends or other matters which may affect the prices of portfolio securities.
Communications between the United States and foreign countries may be less
reliable than within the United States, thus increasing the risk of delayed
settlements of portfolio transactions or loss of certificates for portfolio
securities. In addition, with respect to certain foreign countries, there is the
possibility of expropriation or confiscatory taxation, political or social
instability, or diplomatic developments which could affect United States
investments in those countries. Moreover, individual foreign economies may
differ favorably or unfavorably from the United States economy in such respects
as growth of gross national product, rate of inflation, capital reinvestment,
resource self-sufficiency and balance of payments position. The investment
advisers seek to mitigate the risks associated with the foregoing considerations
through diversification and continuous professional management.

         The Funds may invest in sponsored and unsponsored American Depository
Receipts (ADRs) and, in the case of the Balanced Fund, Global Depository
Receipts (GDRs). ADRs are receipts typically issued by a U.S. bank or trust
company evidencing ownership in the underlying securities. Transactions in these
securities may not necessarily be settled in the same currency as transactions
in the securities into which they represent. Generally ADRs, in registered form,
are designed for use in U.S. securities markets.

         Risks of Specialized Investment Techniques Abroad--The above described
specialized investment techniques, when conducted abroad, may not be regulated
as effectively as in the United States; may not involve a clearing mechanism and
related guarantees; and are subject to the risk of governmental actions
affecting trading in, or the prices of, foreign securities. The value of such
positions also could be adversely affected by (i) other complex foreign
political, legal and economic factors, (ii) lesser availability than in the
United States of data on which to make trading decisions, (iii) delays in the
Funds' ability to act upon economic events occurring in foreign markets during
nonbusiness hours in the United States, (iv) the imposition of different
exercise and settlement terms and procedures and margin requirements than in the
United States, and (v) lesser trading volume.

         Lending of Portfolio Securities--Each Fund and the Index Portfolio may
lend their securities to brokers, dealers and financial institutions, provided
(1) the loan is secured continuously by collateral, consisting of U.S.
Government securities or cash or letters of credit, which is marked to the
market daily to ensure that

                                       17
<PAGE>   43

each loan is fully collateralized at all times; (2) the loan may be called at
any time and the return of the securities loaned obtained within three business
days; (3) each Fund or the Index Portfolio, as the case may be, will receive any
interest or dividends paid on the securities loaned; and (4) the aggregate
market value of securities loaned will not at any time exceed 30% of the total
assets of the Funds or the Index Portfolio, as the case may be.

         Each Fund and the Index Portfolio will earn income for lending their
securities either in the form of fees received from the borrower of the
securities or in connection with the investment of cash collateral in short-term
money market instruments. Loans of securities involve a risk that the borrower
may fail to return the securities or may fail to provide additional collateral.

         In connection with lending securities, the Funds and the Index
Portfolio may pay reasonable finders, administrative and custodial fees. No such
fees will be paid to any person if it or any of its affiliates is affiliated
with the Funds, the Index Portfolio, the investment adviser of the Funds or
Index Portfolio, the investment subadviser of the Balanced Fund or the
investment manager of the Index Portfolio.

         At the present time, the Balanced Fund has no intention to loan
securities worth more than 5% of the Fund's assets.

                     HISTORY OF THE GREEN CENTURY FUNDS AND
                        GREEN CENTURY CAPITAL MANAGEMENT
                              SHAREHOLDER ACTIVISM

         While the companies in the portfolios of the Green Century Balanced
Fund and the Index Portfolio must meet basic standards for corporate
environmental responsibility, some still have room for improvement. In such
cases, Green Century may enter into dialogue with those companies or file a
shareholder resolution to initiate improvement. In addition, the Green Century
Balanced Fund may hold small positions in companies which do not meet the Fund's
environmental criteria for the express purpose of enabling the Fund to advocate
for changes in irresponsible corporate behavior. Since shareholder advocacy is
critical to Green Century's mission of promoting greater corporate environmental
responsibility, Green Century will continue to file additional shareholder
resolutions and work with other concerned environmentally conscious investors.
The following is a history of Green Century's shareholder activism as of October
31, 2000.


CERES -- Green Century Capital Management has been involved with CERES, the
Coalition of Environmentally Responsible Economies, created in 1989 to spur
corporations to better their environmental behavior. The CERES Principles
establish comprehensive corporate environmental standards and disclosure
requirements. Companies that endorse the CERES Principles back up their pledges
with concrete information, publicly reported in the CERES Report. Green Century
Capital Management's participation in CERES has enabled it to join in
negotiations with various corporations, which have ranged from Aveda and Ben &
Jerry's to General Motors and Sunoco, and help increase the pressure for change.
Green Century Capital Management staff also spoke at the May 1993 PepsiCo annual
shareholders meeting in favor of that company's endorsement of the CERES
Principles.

                                       18
<PAGE>   44


     In June of 1997, Green Century co-sponsored a resolution at Thermo
Electron, urging the company to endorse the CERES Principles. The resolution won
4.5 percent of the vote, sufficient to allow the resolution's filers to re-file
next year and to continue to press the company to endorse the CERES Principles.

PEPSICO --In November of 1993, the Balanced Fund filed a shareholder resolution
at Pepsi Co. to spur the corporation to further improve its environmental
programs and limit its active opposition to environmental protection measures
such as recycling campaigns and efforts to pass state and national Bottle Bill
legislation. The vote was held at the May 1994 annual shareholders meeting at
which Green Century Capital Management staff made a presentation in support of
the resolution. The resolution received 43.8 million votes, equal to 8.45% of
the votes cast on the resolution. This was a strong first showing, sending a
message to PepsiCo management about the growing shareholder concern for the
environment.

     In 1995, PepsiCo came to the negotiating table with Green Century,
apparently wishing to avoid the negative publicity that another shareholder
resolution involving PepsiCo's opposition to the bottle bill could create. The
company agreed to conduct a comprehensive study of its environmental policies
and devise a set of principles designed to guide company-wide action. PepsiCo
also agreed to discontinue the use of disposable shipping containers in favor of
plastic shells that it will reuse. The company also committed to manufacture a
new aluminum lid that will save 25 million pounds of aluminum per year.

GENERAL MILLS -- In July of 1994, Green Century Capital Management learned that
General Mills had allowed the manufacture and distribution of 50 million boxes
of cereal that had been made from oats treated with an illegal pesticide. Though
General Mills recalled the contaminated cereal, Green Century Capital Management
wrote to General Mills CEO H. Brewster Atwater requesting that the company more
closely monitor its food manufacturing. Mr. Atwater responded by outlining the
steps the company would take to prevent similar mishaps.

INTEL -- In 1994 the Balanced Fund joined forces with the Jessie Smith Noyes
Foundation in filing a shareholder resolution that would require Intel, an
electronics producer, to make publicly available information which would allow
public assessment of its facilities' environmental and safety hazards. The
resolution was in response to a report by the Southwest Organizing Project which
states that Intel's Rio Rancho plant in New Mexico would require amounts of
water exceeding local capacity. While the resolution did not pass, it did move
Intel President Andrew Grove to initiate a long sought after dialogue with
Noyes' President Stephen Viederman.

     The following year, the Balanced Fund and Noyes filed another shareholder
resolution with Intel, prompting Intel to revise its Environmental, Health and
Safety Policy to include sharing information on the company's environmental and
safety hazards with the public. Further, Intel agreed that the "communities"
with which it will share information will include all community groups and not
just the elected officials and local advisory panels set up by Intel to which
the company had offered limited information in the past. As a result, Noyes,
with the support of Green Century and the other co-filers, withdrew the
shareholders resolution. The resolution's proponents and local community
organizations will continue to monitor Intel's implementation of the new policy.

SECURITIES AND EXCHANGE COMMISSION -- In February of 1995, Green Century Capital
Management staff corresponded with SEC Commissioner Arthur Levitt to urge him
not to allow the SEC to restrict shareholder activism, and with Senator John
Kerry to urge him to consider the rights of shareholders to file resolutions
when considering two pending nominations to the Securities and Exchange
Commission ("SEC").


                                       19

<PAGE>   45


     In September 1997, the SEC proposed new rules that Green Century Capital
Management believed would have disenfranchised shareholder activists by severely
limiting the shareholder resolution process. Green Century Capital Management
formally opposed the new rules by registering concerns with SEC Commissioner
Arthur Levitt and by filing comments with SEC Secretary Jonathon Katz. Green
Century Capital Management joined a diverse coalition of 340 organizations
opposed to the new proposed rules. Coalition partners included environmental
organizations such as the National Wildlife Federation and the Sierra Club.
Green Century Capital Management staff also met with the staff of U.S. House
Commerce Committee members, urging members to oppose the proposed rules. In a
victory for shareholder activists, in May of 1998 the SEC adopted final
regulations that preserved the shareholder resolution process.

TIME WARNER -- In 1992, Time Warner, Inc. committed to convert Time magazine to
chlorine-free paper. The company has not only not done so as of yet and has
resisted requests to report on its plans to convert.

     In 1995, Green Century Capital Management staff wrote Time President
Reginald Brack to request that Time convert to chlorine free paper in its
publications. The Balanced Fund then joined as a co-filer in a shareholder
resolution at Time which asked the Time Board of Directors to report on its
plans to convert to the use of chlorine-free paper. The resolution was presented
at Time Warner's annual shareholder meeting by Green Century Trustee Wendy
Wendlandt on May 16, 1996 and won a yes vote of nearly 18 million shares, or
5.5% of the votes cast. This was enough to persuade Time Warner CEO Gerald Levin
to state that he welcomed continuing dialogue with the resolution's proponents
and to qualify the resolution to be introduced the following year.

     In May of 1997 the resolution was voted on a second time and did not garner
enough votes to allow us to re-introduce it in 1998. Green Century will continue
to work with our co-filers and others on alternative strategies.

PROCTER & GAMBLE - On May 1, 1998, the Equity Fund, on behalf of the Index
Portfolio, joined with other shareholders of Procter & Gamble to file a
resolution with the company. It is Green Century's belief that Procter &
Gamble's use of chlorinated bleached paper perpetuates the release of
unnecessary toxins that are harmful to human and environmental health. The
resolution pressed the company to report to the shareholders on steps it can
take to use chlorine-free pulp and paper as well as on its plans for a long-term
phase out of chlorinated compounds in all of its products. The resolution was
presented at Procter & Gamble's October 13, 1998 annual meeting.

ARCO - In September 1998, the Equity Fund wrote Mike Bowlin, the CEO of Atlantic
Richfield (ARCO), to ask the company to refrain from drilling in the Coastal
Plain, 1002 Area, of the Arctic National Wildlife Refuge in Alaska. The Arctic
National Wildlife Refuge is the only conservation area in the nation that
provides a complete range of Arctic and sub-Arctic ecosystems balanced with a
wide variety of wildlife including large populations of caribou, muskoxen,
brown, black and polar bears, wolves, Dall sheep, snow geese and thousand of
other migratory birds. The Coastal Plain is the biological heart of the Refuge,
to which a vast herd of caribou migrate each spring to give birth. The
Department of the Interior has concluded that oil development in the Coastal
Plain would result in major adverse impacts on this caribou population and
Interior Secretary Bruce Babbitt has likened drilling for oil in the Refuge to
damming up the Grand Canyon. The 125-mile long Coastal Plain is the only section
of Alaska's 1100-mile long North Slope not open for oil and gas drilling. In
fact, oil companies already have access to 95 percent of Alaska's North Slope.
Most recent federal estimates have predicted that

                                       20

<PAGE>   46


only 2.6 million barrels of oil would be economically recoverable in the Coastal
Plain - less than 5 months worth of use in the United States.

     Green Century worked with other concerned investors and environmental
organizations such as U.S. PIRG to prevent the destruction of this precious
resource. The Equity Fund, on behalf of the Index Portfolio, filed a shareholder
resolution in November 1998 requesting that the company voluntarily refrain from
drilling in 1002 Area of the Refuge. Following a meeting with senior ARCO
management in January 1999, the resolution was voted on at ARCO's annual meeting
on May 3, 1999 in Los Angeles, CA. The resolution was presented, on the Equity
Fund's behalf, by environmental advocate Athan Manuel, the PIRG's "Save the
Arctic" Campaign Director. 4.7% of ARCO shareholders voted in support of the
resolution, enough votes to allow the Equity Fund to re-introduce the resolution
at the company's annual meeting in the following year and continue to press
ARCO's management to refrain from drilling in the Refuge. Green Century Capital
Management assisted in organizing similar shareholder resolutions with other oil
companies, including Chevron, who wish to drill in the Arctic National Wildlife
Refuge.

     The Green Century Equity Fund, on behalf of the Index Portfolio, re-filed a
shareholder resolution with ARCO in November of 1999 for vote at the May 2000
shareholder meeting. The resolution again pressed ARCO to unconditionally cancel
any future plans for oil drilling in the Arctic National Wildlife Refuge and
immediately stop the expenditure of any corporate funds targeted to achieve this
objective. However, in April 2000, the U.S. Federal Trade Commission ("FTC")
approved a merger between ARCO and BP AMOCO; as of April 18, 2000 ARCO ceased to
exist, rendering the shareholder resolution moot and the Index Portfolio sold
its BP AMOCO shares.

BP AMOCO- In October 2000, the Green Century Balanced Fund acquired a small
number of shares of BP AMOCO for the purpose of co-filing a shareholder
resolution to encourage the company to refrain from drilling in this pristine
area. Green Century Capital Management is coordinating this shareholder
resolution campaign with the PIRG's national grassroots campaign to preserve and
protect this habitat from destruction.

ADVOCACY EFFORTS IN 2000-2001- The Green Century Funds are preparing to co-file
other shareholder resolutions and engage in dialogue with corporations on a
variety of environmental issues in 2000-2001. Some of these include filing a
resolution on behalf of the Green Century Equity Fund with Campbell Soup Company
and other food manufacturers, asking them to phase out the use of genetically
modified organisms from their products. Green Century Capital Management also
intends to work with other concerned investors to encourage corporations to
phase out the use of chlorine-based chemicals.

GREEN CENTURY EQUITY FUND PROXY VOTES - Invested in a portfolio that owns the
stocks of 400 companies, the Equity Fund's portfolio has opportunities to vote
its shares on many environmental and social issues. Key among these in recent
years was the movement to encourage corporations to endorse the CERES
Principles. The Equity Fund's manager supported shareholder resolutions
advocating CERES endorsements at several companies, including American Express
Company and Kellogg Company.


                                       21

<PAGE>   47


INVESTMENT RESTRICTIONS

     Each Fund and the Index Portfolio is operated under the following
investment restrictions which are deemed fundamental policies and may be changed
with respect to a Fund or the Index Portfolio only with the approval of the
holders of a "majority of the outstanding voting securities" of the Fund or the
Index Portfolio which, as defined in the 1940 Act and as used herein, means the
vote of (i) 67% or more of the Fund's shares or the Index Portfolio's interests
present at a meeting, if the holders of more than 50% of the outstanding shares
of the Fund or interests in the Index Portfolio are present in person or
represented by proxy; or (ii) more than 50% of the Fund's outstanding shares or
the Index Portfolio's outstanding interests whichever is less. Whenever the
Equity Fund is requested to vote on a matter pertaining to the Index Portfolio,
the Trustees of the Equity Fund will, in their discretion and in accordance with
applicable law, either seek instructions from shareholders of the Equity Fund
and vote the shares only in accordance with such instructions, or vote the
shares held by the Equity Fund in the same proportion as the vote of all other
holders of shares in the Index Portfolio.

                                  BALANCED FUND

     The Trust, on behalf of the Balanced Fund, may not:

     (1) borrow money or mortgage or hypothecate assets of the Fund, except that
in an amount not to exceed 1/3 of the current value of the Fund's net assets, it
may borrow money as a temporary measure for extraordinary or emergency purposes
and enter into reverse repurchase agreements or dollar roll transactions, and
except that it may pledge, mortgage or hypothecate not more than 1/3 of such
assets to secure such borrowings (it is intended that money would be borrowed
only from banks and only either to accommodate requests for the redemption of
shares while effecting an orderly liquidation of portfolio securities or to
maintain liquidity in the event of an unanticipated failure to complete a
portfolio security transaction or other similar situations) or reverse
repurchase agreements, provided that collateral arrangements with respect to
options and futures, including deposits of initial deposit and variation margin,
are not considered a pledge of assets for purposes of this restriction and
except that assets may be pledged to secure letters of credit solely for the
purpose of participating in a captive insurance company sponsored by the
Investment Company Institute; for additional related restrictions, see clause
(i) under the caption "Non-Fundamental State and Federal Restrictions" below.
(As an operating policy, the Fund may not engage in reverse repurchase
agreements.);

     (2) purchase any security or evidence of interest therein on margin, except
that such short-term credit as may be necessary for the clearance of purchases
and sales of securities may be obtained and except that deposits of initial
deposit and variation margin may be made in connection with the purchase,
ownership, holding or sale of futures;

     (3) underwrite securities issued by other persons except insofar as the
Trust or the Fund may technically be deemed an underwriter under the 1933 Act in
selling a portfolio security;

     (4) make loans to other persons except (a) through the lending of the
Fund's portfolio securities and provided that any such loans not exceed 30% of
the Fund's total assets (taken at market value), (b) through the


                                       22

<PAGE>   48


use of repurchase agreements or the purchase of short-term obligations and
provided that not more than 10% of the Fund's net assets will be invested in
repurchase agreements maturing in more than seven days, or (c) by purchasing a
portion of an issue of debt securities of types commonly distributed privately
to financial institutions, for which purposes the purchase of short-term
commercial paper or a portion of an issue of debt securities which are part of
an issue to the public shall not be considered the making of a loan;

     (5) purchase or sell real estate (including limited partnership interests
but excluding securities secured by real estate or interests therein), interests
in oil, gas or mineral leases, commodities or commodity contracts (except
futures and option contracts) in the ordinary course of business (the Trust may
hold and sell, for the Fund's portfolio, real estate acquired as a result of the
Fund's ownership of securities);

     (6) make short sales of securities or maintain a short position, unless at
all times when a short position is open it owns an equal amount of such
securities or securities convertible into or exchangeable, without payment of
any further consideration, for securities of the same issue and equal in amount
to, the securities sold short, and unless not more than 10% of the Fund's net
assets (taken at market value) is represented by such securities, or securities
convertible into or exchangeable for such securities, at any one time (the Trust
has no current intention to engage in short selling);

     (7) concentrate its investments in any particular industry (excluding U.S.
Government securities), but if it is deemed appropriate for the achievement of
the Fund's investment objective, up to 25% of its total assets may be invested
in any one industry, except that positions in futures or option contracts shall
not be subject to this restriction; and

     (8) issue any senior security (as that term is defined in the 1940 Act) if
such issuance is specifically prohibited by the 1940 Act or the rules and
regulations promulgated thereunder, provided that collateral arrangements with
respect to options and futures, including deposits of initial deposit and
variation margin, are not considered to be the issuance of a senior security for
purposes of this restriction.

     Non-Fundamental Restrictions--In order to comply with certain federal
statutes and policies the Trust, on behalf of the Balanced Fund, will not as a
matter of operating policy:

     (1)  purchase securities issued by any investment company if as a result
          thereof (a) more than 10% of the Fund's total assets (taken at the
          greater of cost or market value) to be invested in the securities of
          such issuers; (b) more that 5% of the Fund's total assets (taken at
          the greater of cost or market value) to be invested in any one
          investment company; or (c) more than 3% of the outstanding voting
          securities of any such issuer to be held for the Fund (the Trust has
          no current intention of investing the assets of the Fund in other
          investment companies);

     (2)  invest more than 15% of the net assets of the Fund (taken at the
          greater of cost or market value) in securities that are illiquid or
          not readily marketable;

     (3)  with respect to 75% of the total assets of the Fund, invest more than
          5% of the total assets of the Fund in the securities or obligations of
          any one issuer (other than U.S. Government obligations) or acquire
          more than 10% of the outstanding voting securities of any one issuer;


                                       23

<PAGE>   49


     These policies are not fundamental and may be changed without shareholder
approval in response to changes in the various state and federal requirements.


                         EQUITY FUND AND INDEX PORTFOLIO

     Neither the Equity Fund nor the Index Portfolio may:

     (1) borrow money, except that as a temporary measure for extraordinary or
emergency purposes either the Fund or the Index Portfolio may borrow an amount
not to exceed 1/3 of the current value of the net assets of the Fund or the
Index Portfolio, respectively, including the amount borrowed (moreover, neither
the Fund nor the Index Portfolio may purchase any securities at any time at
which borrowings exceed 5% of the total assets of the Fund or the Index
Portfolio, respectively, taken in each case at market value) (it is intended
that the Index Portfolio would borrow money only from banks and only to
accommodate requests for the withdrawal of all or a portion of a beneficial
interest in the Index Portfolio while effecting an orderly liquidation of
securities);

     (2) purchase any security or evidence of interest therein on margin, except
that either the Fund or the Index Portfolio may obtain such short-term credit as
may be necessary for the clearance of purchases and sales of securities and
except that either the Fund or the Index Portfolio may make deposits of initial
deposit and variation margin in connection with the purchase, ownership, holding
or sale of options;

     (3) write any put or call option or any combination thereof, provided that
this shall not prevent (i) the purchase, ownership, holding or sale of warrants
where the grantor of the warrants is the issuer of the underlying securities, or
(ii) the purchase, ownership, holding or sale of options on securities;

     (4) underwrite securities issued by other persons, except that the Fund may
invest all or any portion of its assets in the Index Portfolio and except
insofar as either the Fund or the Index Portfolio may technically be deemed an
underwriter under the 1933 Act in selling a security;

     (5) make loans to other persons except (a) through the lending of
securities held by either the Fund or the Index Portfolio and provided that any
such loans not exceed 30% of its total assets (taken in each case at market
value), or (b) through the use of repurchase agreements or the purchase of
short-term obligations and provided that not more than 10% of its net assets
will be invested in repurchase agreements maturing in more than seven days; for
additional related restrictions, see paragraph (6) immediately following;

     (6) invest in securities which are subject to legal or contractual
restrictions on resale (other than repurchase agreements maturing in not more
than seven days and other than securities which may be resold pursuant to Rule
144A under the 1933 Act if the Board of Trustees determines that a liquid market
exists for such securities) if, as a result thereof, more than 10% of its net
assets (taken at market value) would be so invested (including repurchase
agreements maturing in more than seven days), except that the Fund may invest
all or any portion of its assets in the Index Portfolio;

     (7) purchase or sell real estate (including limited partnership interests
but excluding securities secured by real estate or interests therein), interests
in oil, gas or mineral leases, commodities or commodity contracts

                                       24

<PAGE>   50


in the ordinary course of business (the Fund and Index Portfolio reserve the
freedom of action to hold and to sell real estate acquired as a result of the
ownership of securities by the Fund or the Index Portfolio);

     (8) make short sales of securities or maintain a short position, unless at
all times when a short position is open the Fund or the Index Portfolio, as
applicable, owns an equal amount of such securities or securities convertible
into or exchangeable, without payment of any further consideration, for
securities of the same issue as, and equal in amount to, the securities sold
short, and unless not more than 5% of the Fund's or the Index Portfolio's, as
applicable, net assets (taken in each case at market value) is held as
collateral for such sales at any one time;

     (9) issue any senior security (as that term is defined in the 1940 Act) if
such issuance is specifically prohibited by the 1940 Act or the rules and
regulations promulgated thereunder, except as appropriate to evidence a debt
incurred without violating paragraph (1) above;

     (10) as to 75% of its assets, purchase securities of any issuer if such
purchase at the time thereof would cause more than 5% of the Index Portfolio's
or the Fund's, as applicable, assets (taken at market value) to be invested in
the securities of such issuer (other than securities or obligations issued or
guaranteed by the United States or any agency or instrumentality of the United
States), except that for purposes of this restriction the issuer of an option
shall not be deemed to be the issuer of the security or securities underlying
such contract and except that the Fund may invest all or any portion of its
assets in the Index Portfolio; and

     (11) invest more than 25% of its assets in any one industry unless the
stocks in a single industry were to comprise more than 25% of the Social Index,
in which case the Index Portfolio or the Fund, as applicable, will invest more
than 25% of its assets in that industry, and except that the Fund may invest all
of its assets in the Index Portfolio.

     Non-Fundamental Restrictions: In order to comply with certain federal
statutes and policies, the Portfolio will not, as a matter of operating policy,
purchase puts, calls, straddles, spreads and any combination thereof if the
value of its aggregate investment in such securities will exceed 5% of the
Portfolio's total assets at the time of such purchase.

     This policy is not fundamental and may be changed by the Portfolio without
the approval of its investors in response to changes in federal requirements.

     Percentage Restrictions: If a percentage restriction or rating restriction
on investment or utilization of assets set forth above or referred to in the
Prospectus is adhered to at the time an investment is made or assets are so
utilized, a later change in percentage resulting from changes in the value of
the securities held by a Fund or the Index Portfolio or a later change in the
rating of a security held by a Fund or the Index Portfolio will not be
considered a violation of policy; provided that if at any time the ratio of
borrowings of a Fund to the net asset value of a Fund exceeds the ratio
permitted by Section 18(f) of the 1940 Act, a Fund will take the corrective
action required by Section 18(f).


                                       25



<PAGE>   51




TRUSTEES AND OFFICERS

     The affairs of the Green Century Funds are conducted under the direction of
the Board of Trustees of Green Century and the affairs of the Index Portfolio
are conducted under the direction of its Board of Trustees. The Trustees and
officers of Green Century are separate and independent from the Trustees and
officers of the Index Portfolio.

     The Trustees and officers of the Trust and the Index Portfolio and their
principal occupations during the past five years (although their titles may have
varied during the period) are:

                              TRUSTEES OF THE TRUST

     DAVID J. FINE (52) - Trustee of the Trust; Attorney, Dangel, Donlan & Fine
(since January, 1996); Attorney, Dangel & Fine (from August, 1993 to January,
1996).

     DOUGLAS M. HUSID* (49) - Trustee of the Trust; President of the Trust;
Co-Managing Partner, Goulston & Storrs, P.C. (since October, 1991).

     STEVEN KADISH (44) - Trustee of the Trust; Senior Vice President for
Administration, Harvard Pilgrim Health Care (since July, 1999); Assistant Vice
Chancellor for Biologic Laboratories and Programs, University of Massachusetts
Medical Center (from June, 1997 to July, 1999); Assistant Secretary for
Administration and Finance, Commonwealth of Massachusetts (from June, 1995 to
June, 1997).

     STEPHEN MORGAN (52) - Trustee of the Trust; President, EUA, Citizens
Conservation Services, Inc. (since January, 1995).

     DOUGLAS H. PHELPS* (53) - Trustee of the Trust; Chair, Fund for Public
Interest Research (since May, 1983); President, Telefund, Inc. (since January,
1988).

     C. WILLIAM RYAN (46) - Trustee of the Trust; Director, Brookline Tai Chi
(since March, 1992).

     JAMES H. STARR (53) - Trustee of the Trust; Attorney, Starr and Burgess, PC
(since 1989); Director, Crested Butte Land Trust (since 1991).

     WENDY WENDLANDT* (39) - Trustee of the Trust; Chairperson of the Board,
Earth Day 2000 (since February, 1991); Senior Staff, Fund for Public Interest
Research (since November, 1989).

                              OFFICERS OF THE TRUST

     KRISTINA A. CURTIS (48) - Treasurer of the Trust; Treasurer, Director and
Chief Operating Officer, Green Century Capital Management, Inc. (since July,
1991).

     ADRIENNE M. SHISHKO (38) - Secretary and Assistant Treasurer of the Trust;
Vice President, Green Century Capital Management, Inc. (since November, 1999);
General Counsel, Vice President - Marketing and Director, Green Century Capital
Management, Inc. (from July, 1991 to March, 1996).



                                       26


<PAGE>   52


                         TRUSTEES OF THE INDEX PORTFOLIO

AMY L. DOMINI* -- 230 Congress Street, Boston, Massachusetts 02110; Chair,
President and Trustee of the Index Portfolio, Domini Social Investment Trust and
Domini Institutional Trust; Managing Principal of DSIL; Private Trustee, Loring,
Wolcott & Coolidge; Trustee, New England Quarterly (since 1998); Trustee,
Episcopal Church Pension Fund; Former Member, Governing Board, Interfaith Center
on Corporate Responsibility; Former Trustee, National Association Community Loan
Funds; Former Board Member of National Community Capital Association
(1987-1990). Her date of birth is January 15, 1950.

JULIA ELIZABETH HARRIS -- 54 Burroughs Street, Jamaica Plain, Massachusetts
02130; Vice President, UNC Partners, Inc. (since 1990); Director and Treasurer,
Boom Times, Inc. (from 1997 to 1999); Director and Chair of Board of Directors,
The Green Book, Inc. (1991-1996); Trustee, Domini Social Investment Trust and
Domini Institutional Trust. Her date of birth is July 11, 1948.

KIRSTEN S. MOY -- 151 North Michigan Avenue, Suite 1209, Chicago, Illinois
60601; Consultant, Project Director and Principal Researcher, Community
Development Innovation and Infrastructure Initiative (since December 1998); RDFI
Rating System Advisory Board Member, National Community Capital Association
(since 1999); Member, Community Economic Development Board of Overseers, New
Hampshire College (since November 1998); Advisory Group Member, Shorebank
Liquidity Project (since 1999); Consultant, Social Investment Forum, Community
Development Project (June 1998-December 1998); Director, Community Development
Financial Institutions Fund, U.S. Department of the Treasury (October 1995 -
October 1997); Senior Vice President and Portfolio Manager, Equitable Real
Estate Investment Management (prior to 1995); Trustee, Domini Social Investment
Trust and Domini Institutional Trust. Her date of birth is June 30, 1947.

WILLIAM C. OSBORN -- 115 Buckminster Road, Brookline, Massachusetts 02445;
Consultant, Arete Corporation; Manager, Venture Investment Management Company
LLC (prior to 1999); Trustee, Domini Social Investment Trust and Domini
Institutional Trust; Vice President and General Manager, TravElectric Services
Corp (prior to 1995); President, Environmental Technologies (prior to 1993);
Director, Evergreen Solar, Inc; Director, Conservation Services Group; Director,
Fingerlake Aquaculture LLC; director, Surgical Sealants; Director, Word Power
Technologies, Inc.; . His date of birth is July 7, 1944.

KAREN PAUL -- 4050 Park Avenue, Miami, Florida 33133; Professor of Management
and International Business, Florida International University (since 1991);
Trustee, Domini Social Investment Trust and Domini Institutional Trust; Partner,
Trinity Industrial Technology (since 1995); Executive Director, Center for
Management in the Americas (since 1997). Her date of birth is September 23,
1944.

GREGORY A. RATLIFF -- 1712 Carmen Avenue, Chicago, Illinois 60640; Director,
Access to Economic Opportunity, John D. and Catherine T. MacArthur Foundation
(since 1997); Associate Director, Program-Related Investments, John D. and
Catherine T. MacArthur Foundation (1993-1997); Trustee, Domini Social Investment
Trust and Domini Institutional Trust. His date of birth is June 12, 1960.

FREDERICK C. WILLIAMSON, SR. -- Five Roger Williams Green, Providence, Rhode
Island 02904; Treasurer and Trustee, RIGHA (charitable foundation supporting
health care needs) since 1990; Chairman, Rhode Island Historical Preservation
and Heritage Commission (since 1995); Trustee, National Parks and


                                       27

<PAGE>   53


Conservation Association (1986-1997); Advisor, National Parks and Conservation
Association (since 1997); Trustee of the National Park Trust (since 1991);
President's Advisory Board - Salve Regina University, Newport, RI (since 1999);
Trustee, Domini Social Investment Trust and Domini Institutional Trust. His date
of birth is September 20, 1915.


                         OFFICERS OF THE INDEX PORTFOLIO

STEVEN D. LYDENBERG* -- Vice President of Domini Social Investment Trust, Domini
Institutional Trust and the Index Portfolio; Director of Research of Kinder,
Lydenberg, Domini & Co., Inc.; Member, Domini Social Investments LLC (since
1997). His date of birth is October 21, 1945.

DAVID P. WIEDER* -- Vice President of Domini Social Investment Trust, Domini
Institutional Trust and the Index Portfolio (since 1997); Chief Executive
Officer and Managing Principal, Domini Social Investments LLC (since 1997);
President of FSSI (since 1989); Vice-President of investment companies within
Fundamental Family of Funds (1989-1997); Vice-President of Fundamental Portfolio
Advisors (1991-1997). His date of birth is January 8, 1966.

SIGWARD M. MOSER* -- Vice President of Domini Social Investment Trust, Domini
Institutional Trust and the Index Portfolio (since 1997); President and Managing
Principal, Domini Social Investments LLC (since 1997); President of
Communications House International, Inc.; Director of Financial Communications
Society. His date of birth is June 12, 1962.

CAROLE M. LAIBLE* -- Secretary and Treasurer of Domini Social Investment Trust,
Domini Institutional Trust and the Index Portfolio (since 1997); Financial
Compliance Officer of Domini Social Investments LLC (since 1997); Board of
Governors, Daytop - NJ (since 1998); Financial Compliance Officer, FSSI
(1994-1997); Financial Compliance Officer and Secretary of investment companies
within Fundamental Family of Funds (1994-1997); General Service Manager,
McGladrey & Pullen LLP (certified public accountants) (prior to 1994). Her date
of birth is October 31, 1963.

     Unless otherwise indicated, the mailing address of all of the Trustees and
officers of the Trust is Green Century Funds, 29 Temple Place, Suite 200,
Boston, Massachusetts 02111. Unless otherwise indicated, the mailing address of
all the officers of the Index Portfolio is 536 Broadway, 7th Floor, New York,
New York 10012. Each of the officers of the Index Portfolio also serve as
officers of the Domini Social Equity Fund and Domini Institutional Trust, other
registered investment companies which invest in the Index Portfolio. Each of the
listed Trustees of the Index Portfolio also serves as Trustees of the Domini
Social Equity Fund and the Domini Institutional Trust.

     No Trustee of the Trust receives any compensation from the Trust, but each
Trustee who is not an "interested person" of the Trust is reimbursed for any
out-of-pocket expenses incurred in attending meetings of the Board of Trustees
or of any committee thereof. Each Trustee of the Index Portfolio who is not
otherwise affiliated with the Index Portfolio, receives an annual retainer for
serving as a Trustee of the Domini Social Equity Fund, Domini Institutional
Trust and Index Portfolio. Neither the Trust nor the Index Portfolio contribute
to a retirement plan for the Trustees of the Trust or the Index Portfolio.


                                       28

<PAGE>   54


Trust Trustees

<TABLE>
<CAPTION>
                                AGGREGATE                   TOTAL COMPENSATION
                            COMPENSATION FROM                 FROM THE TRUST
                             THE TRUST FOR THE                FOR THE FISCAL
                                YEAR ENDED                      YEAR ENDED
                              JULY 31, 2000                    JULY 31, 2000
                              -------------                    -------------
<S>                            <C>                             <C>
David J. Fine, Trustee             None                              None
Douglas M. Husid,                  None                              None
Trustee
Steven Kadish, Trustee             None                              None
Stephen Morgan, Trustee            None                              None
Douglas H. Phelps,                 None                              None
Trustee
C. William Ryan,                   None                              None
Trustee
James H. Starr, Trustee            None                              None
Wendy Wendlandt,                   None                              None
Trustee
</TABLE>



Index Portfolio Trustees



<TABLE>
<CAPTION>
                                    AGGREGATE
                               COMPENSATION FROM
                              THE INDEX PORTFOLIO
                              FOR THE YEAR ENDED
                                JULY 31, 2000
<S>                             <C>
Amy L. Domini, Chair,              None
President and Trustee
Julia Elizabeth Harris,            $  4,160
Trustee
Kirsten S. Moy, Trustee            $  4,160
William C. Osborn, Trustee         $  4,160
Karen Paul, Trustee                $  4,160
Gregory A. Ratliff, Trustee        $  3,910
Timothy Smith, Trustee*            $  4,160
Frederick C. Williamson,           $  4,160
Trustee
</TABLE>

*    Mr. Smith resigned as a Trustee of the Index Portfolio after July 31, 2000.


                                       29
<PAGE>   55

        As of October 31, 2000 all Trustees and officers of the Trust as a group
owned less than 1% of the outstanding shares of each Fund. As of October 31,
2000, the following are the only persons known by the Trust to have more than 5%
of the outstanding shares of the Balanced or Equity Funds: National Financial
Services Corporation owned 19.82% of the outstanding shares of the Balanced
Fund, Charles Schwab & Company owned 19.56% of the Balanced Fund and RBSTB
Nominees owned 8.52% of the Balanced Fund (owners of record, not beneficial
owners). National Financial Services owned 12.85% of the Equity Fund and Charles
Schwab and Company owned 8.68% of the Equity Fund (owners of record, not
beneficial owners). Shareholders owning 25% or more of the outstanding shares of
a Fund may take actions without the approval of any other investor in that Fund.

CODE OF ETHICS. Rule 17j-1 under the Investment Company Act of 1940 is designed
to prevent abuses that could occur as a result of conflicts of interest arising
out of personal trading by persons involved with or with access to information
about a fund's investment activities. The Funds, the Adviser and the Subadviser
(as defined below), Domini Social Investments LLC and Mellon Equity Associates,
LLP have each adopted detailed Codes of Ethics regarding personal investing by
their personnel pursuant to Rule 17j-1 under the Investment Company Act of 1940.
The Codes of Ethics requires personnel who are "access persons" of any fund
within the meaning of Rule 17j-1 to comply with their respective Code of Ethics,
subject to sanctions for noncompliance. Each Code of Ethics places certain
restrictions on the trading activities of its access persons, along with
reporting requirements.

INVESTMENT ADVISERS AND MANAGERS

BALANCED FUND

        INVESTMENT ADVISER Under an Investment Advisory Agreement dated as of
August 13, 1991 as amended and restated on March 29, 1999 (the Advisory
Agreement") between the Trust, on behalf of the Balanced Fund, and Green Century
Capital Management, Inc. ("Green Century Capital" or the "Adviser"), and subject
to the general supervision of the Trust's Trustees and in conformance with the
respective stated policies of the Balanced Fund, Green Century Capital provides
general investment advice to the Balanced Fund. Green Century Capital also helps
the Trust design, and instructs the Balanced Fund's investment subadviser as to
how to implement the Trust's environmental criteria.

        The Advisory Agreement provides that it will continue indefinitely if
its continuance is specifically approved at least annually by the vote of the
holders of a majority of the outstanding voting securities of the Fund or by
vote of a majority of the Trust's Board of Trustees; and provided further that
such continuance is also approved annually by the vote of a majority of the
Trustees who are not parties to the Advisory Agreement or interested persons of
the Trust's Adviser, cast in person at a meeting called for the purpose of
voting on such approval. The Advisory Agreement may be terminated at any time
without payment of any penalty, by the Trust's Board of Trustees or by a vote of
the majority of the outstanding voting securities of the Fund upon 60 days'
prior written notice to the Adviser and by the Adviser upon 60 days' prior
written notice to the Trust. The Advisory Agreement provides that it shall
terminate automatically in the event of its assignment.

        The Advisory Agreement further provides that absent willful misfeasance,
bad faith, gross negligence, or reckless disregard of obligations or duties
under the Advisory Agreement on the part of the Adviser, the Adviser

                                       30

<PAGE>   56

shall not be subject to liability to the Trust or to any shareholder of the Fund
for any act or omission in the course of, or in connection with, rendering
services under the Advisory Agreement or for any losses that may be sustained in
the purchase, holding of sale of any security. The Advisory Agreement also
provides that the services of the Adviser are not deemed exclusive and that the
Adviser may render similar services to others.

        Under the Advisory Agreement, the Trust has agreed that the names "Green
Century Funds" and "Green Century" are proprietary to the Adviser.

        Green Century Capital is wholly owned by Paradigm Partners, a California
general Partnership, the partners of which are all not-for-profit environmental
advocacy organizations. The Massachusetts Public Interest Research Group
(MASSPIRG) owns approximately 46% of Paradigm Partners.

        As compensation for the services rendered and obligations assumed by the
Adviser, the Trust pays to the Adviser monthly a fee equal on an annual basis to
0.75% of the average daily net assets of the Balanced Fund, computed and accrued
daily. For the fiscal year ended June 30, 1998, the Balanced Fund accrued
advisory fees aggregating $104,833. For the one month period ended July 31,
1998, the Balanced Fund accrued advisory fees aggregating $10,301. For the
fiscal years ended July 31, 1999 and 2000, the Balanced Fund accrued advisory
fees aggregating $104,953 and $253,330, respectively.

        INVESTMENT SUBADVISER Green Century Capital has entered into an
Investment Subadvisory Agreement on behalf of the Balanced Fund (an "Subadvisory
Agreement") with Winslow Management Company ("Winslow" or the "Subadviser")
dated as of April 1, 1999. It is Winslow's responsibility under the direction of
the Adviser, to make the day-to-day investment decisions for the Balanced Fund
and to place the purchase and sale orders for the portfolio transactions of the
Balanced Fund consistent with the environmental criteria established by the
Adviser and subject to the general direction of the Adviser. Winslow is a
separate operating division of Adams, Harkness & Hill, Inc. ("AHH"), a
registered investment adviser. Winslow manages equity and debt investments in
environmental and environmentally responsible companies for its clients. Winslow
has been a division of AHH since April 1, 1999 and formerly was a separate
operating division of Eaton Vance Management. As of September 30, 2000, Winslow
had over $340 million in assets under management.

        The Subadvisory Agreement provides that it will continue indefinitely if
its continuance is approved at least annually by vote of the holders of a
majority of the outstanding voting securities of the Fund or by vote of a
majority of the Trust's Board of Trustees; and further provided that such
continuance is also approved annually by the vote of a majority of the Trustees
who are not parties to the Subadvisory Agreement or interested persons of the
Subadviser, cast in person at a meeting called for the purpose of voting on such
approval. The Subadvisory Agreement will terminate automatically in the event of
the termination of the Advisory Agreement or in the event of its assignment. In
addition, the Subadvisory Agreement may be terminated at any time without
payment of any penalty, by the Trust's Board of Trustees or by a vote of the
majority of the outstanding voting securities of the Fund upon 60 days' prior
written notice to the Subadviser and by the Subadviser upon 180 days' prior
written notice to the Trust.

        The Subadvisory Agreement further provides that absent willful
misfeasance, bad faith, gross negligence, or reckless disregard of obligations
or duties under the Subadvisory Agreement on the part of the Subadviser, the
Subadviser shall not be subject to liability to the Trust or to any shareholder
of the Fund for any act or omission in the course of, or connected with,
rendering services thereunder or for any losses that may be

                                       31

<PAGE>   57

sustained in the purchase, holding of sale of any security. The Subadvisory
Agreement also provides that the services of the Subadviser are not deemed
exclusive and that the Subadviser may render similar services to others.

        For its services, Green Century Capital has agreed to pay Winslow a fee
equal on an annual basis to 0.40% of the value of the average daily net assets
of the Balanced Fund (the "Base Fee"), such fee shall be accrued daily and
payable at the end of each quarter, and subject to the following adjustment: for
each calendar quarter commencing one year after Winslow begins rendering
services hereunder, the Base Fee shall be adjusted as follows: (i) if the Fund's
total return (calculated in accordance with Rule 482 of Regulation C promulgated
under the 1933 Act) for the immediately prior twelve month period ("Fund Total
Return") is greater than the total return of the Lipper Directors' Analytical
Data Balanced Fund Average (the "Index Total Return") plus 1%, then the Base Fee
for such quarter shall be increased by an amount which is the product of .025%
multiplied by the average daily net assets for such year, (ii) if the Fund Total
Return exceeds the Index Total Return plus 2%, then the Base Fee for such
quarter shall be increased by an amount which is the product of .05% multiplied
by the average daily net assets for such year, (iii) if the Fund Total Return is
less than the Index Total Return minus 1%, then the Base Fee for such quarter
shall be decreased by an amount which is the product of .025% multiplied by the
average daily net assets for such year, or (iv) if the Fund Total Return is less
than the Index Total Return minus 2%, then the Base Fee for such quarter shall
be reduced by an amount which is the product of .05% multiplied by the average
daily net assets for such year.

        For Example:

If, on an annual basis, the Balanced Fund's
Total Return differs from the Index Total          Then the Adviser will
Return by:                                         pay Winslow an annual fee of:

        positive 2.00% or more                                0.60%
        positive 1.00% to positive 1.99%                      0.50%
        negative 0.99% to positive 0.99%                      0.40%
        negative 1.00% to negative 1.99%                      0.30%
        negative 2.00% or more                                0.20%

        The Board of Trustees believes that the performance adjustments are
appropriate although not within the 10 percentage points per year range
suggested by Release No. 7113 under the 1940 Act. In the event the Lipper
Directors' Analytical Data Balanced Fund Average ceases to become available or
the Trustees determine such Index Total Return is no longer a reasonable
performance benchmark, the Trustees may substitute another performance
benchmark.

        For the fiscal year ended June 30, 1998 , the Adviser paid Winslow
subadvisory fees aggregating $60,011. For the one-month period ended July 31,
1998, the Advisor paid Winslow advisory fees aggregating $5,491. For the fiscal
years ended July 31, 1999 and 2000 , the Advisor paid Winslow advisory fees
aggregating $26,938 and $176,513, respectively.


                                       32



<PAGE>   58

EQUITY FUND AND INDEX PORTFOLIO

     INVESTMENT ADVISER The Equity Fund has not retained the services of an
investment adviser or investment subadviser since the Fund seeks to achieve its
investment objective by investing all its assets in the Index Portfolio. The
Index Portfolio has retained the services of Domini Social Investments LLC
("DSI") as investment manager and Mellon Equity Associates, LLP ("Mellon
Equity") as submanager for the Index Portfolio.

        INVESTMENT MANAGER Pursuant to a Management agreement dated and
effective as of October 22, 1997 (the "Management Agreement") between the Index
Portfolio and DSI, DSI provides investment supervisory and administrative
services to the Index Portfolio. The services provided by DSI consist of
investment supervisory services, overall operational support and administrative
services. The administrative services include the provision of general office
facilities and supervising the overall administration of the Index Portfolio.

        The Management Agreement will continue in effect if its continuance is
specifically approved at least annually (i) by the vote of a majority of the
Trustees of the Index Portfolio who are not "interested persons" of the Index
Portfolio or of DSI at a meeting specifically called for the purpose of voting
on such approval, and (ii) by the Board of Trustees of the Index Portfolio or by
vote of a majority of the outstanding voting securities of the Index Portfolio.
The Management Agreement also provides that it may be terminated at any time
without the payment of any penalty by the Trustees or by the vote of a majority
of the outstanding voting securities of the Index Portfolio, or by DSI, in each
case on not more than 60 days' nor less than 30 days' written notice to the
other party. The Management Agreement shall automatically terminate in the event
of its assignment.

        Pursuant to the Management Agreement, DSI shall not be liable for any
error of judgment or mistake of law or for any loss arising out of any
investment or for any act or omission in the execution of securities
transactions for the Index Portfolio, except for willful misfeasance, bad faith
or gross negligence in the performance of its duties, or by reason of reckless
disregard of its obligations and duties thereunder. The Management Agreement
further provides that the services of DSI to the Index Portfolio are not deemed
to be exclusive, DSI being free to render investment advisory, administrative
and/or other services to others.

        For its services under the Management Agreement, DSI receives a fee
equal on an annual basis to 0.20% of the Index Portfolio's average daily net
assets. From October 22, 1997 through July 31, 1998, DSI received management
fees of $701,774. For the fiscal years ended July 31, 1999 and 2000 DSI received
management fees of $1,791,617 and $3,257,616, respectively.

        Prior to October 22, 1997, the investment adviser to the Index Portfolio
was Kinder, Lydenberg, Domini & Co., Inc. ("KLD"). For its services under its
investment advisory agreement with the Index Portfolio, KLD was entitled to
receive from the Index Portfolio a fee accrued daily and paid monthly at an
annual rate equal to 0.025% of the Index Portfolio's average daily net assets.
For the fiscal year ended July 31, 1995, KLD voluntarily waived all of its
advisory fees. For the fiscal years ended July 31, 1997 and 1998, KLD received
advisory fees of $46,528 and $17,385, respectively.

        In addition to serving as investment manager, prior to October 22, 1997,
KLD also served as sponsor of the Index Portfolio. KLD received sponsorship fees
from the Index Portfolio at an annual rate of 0.20% of the

                                       33
<PAGE>   59

average daily net assets of the Index Portfolio for the Index Portfolio's
then-current fiscal year. KLD continues to determine and monitor the composition
of the Domini 400 Social Index (which determines the composition of the Index
Portfolio's securities), and provide other services relating to socially
responsible investments pursuant to a license agreement between DSI and KLD. KLD
received sponsorship fees of $295,633 for the period November 6, 1996 to July
31, 1997 and $0 for the period from August 1, 1997 to October 22, 1997 from the
Index Portfolio. The Sponsorship Agreement was terminated as of October 22,
1997.

         Prior to October 22, 1997, and pursuant to an Administrative Services
Agreement between Signature Broker-Dealer Services, Inc. ("Signature") and KLD,
KLD engaged Signature to provide certain administrative services to the Index
Portfolio. In such capacity, Signature performed certain administrative services
requested by KLD. For the fiscal years ended July 31, 1997 and 1998, Signature
received Administrative Services fees from the Index Portfolio of $46,528 and
$17385, respectively. The Administrative Services Agreement was terminated
effective October 22, 1997.

         "Domini 400 Social Index(SM)" "Domini 400" and "Domini Social Index"
are service marks of KLD which are licensed to DSI with the consent of Amy L.
Domini (with regard to the word "Domini"). Pursuant to agreements among DSI, Ms.
Domini and the Index Portfolio, the Index Portfolio may be required to
discontinue the use of these service marks if (i) DSI ceases to be the Manager
of the Index Portfolio, (ii) Ms. Domini withdraws or DSI withdraws her or its
consent to the use of the word "Domini" or (iii) the license agreement between
KLD and DSI is terminated.

        INVESTMENT SUBMANAGER Mellon Equity Associates, LLP ("Mellon Equity")
provides investment submanagement services to the Index Portfolio on a
day-to-day basis pursuant to an Amended and Restated Submanagement Agreement
with DSI effective November 15, 1999. Mellon Equity's services as submanager
include providing DSI with such investment advice and supervision as DSI may
from time to time consider necessary for the proper supervision of the Index
Portfolio's investment assets, and determining what securities shall be
purchased, sold or exchanged and what portion of the assets of the Index
Portfolio allocated by DSI shall be held uninvested. Mellon Equity does not
determine the composition of the Domini Social Index.

        The Submanagement Agreement will continue in effect if its continuance
is specifically approved at least annually (i) by the vote of a majority of the
Trustees of the Index Portfolio who are not "interested persons" of the Index
Portfolio or of DSI or Mellon Equity at a meeting specifically called for the
purpose of voting on such approval, and (ii) by the Board of Trustees of the
Index Portfolio or by vote of a majority of the outstanding voting securities of
the Index Portfolio. The Submanagement Agreement also provides that it may be
terminated at any time without the payment of any penalty by the Trustees of the
Index Portfolio, or by the vote of a majority of the outstanding voting
securities of the Index Portfolio, or by DSI with the prior consent of the
Trustees of the Index Portfolio, in each case on not more than 60 days' nor less
than 30 days' written notice to the other party. In addition, the Submanagement
Agreement may be terminated at any time without the payment of any penalty by
Mellon Equity on not less than 90 days' written notice to DSI and the Trustees
of the Index Portfolio. The Submanagement Agreement shall automatically
terminate in the event of its assignment.

        Pursuant to the Submanagement Agreement, Mellon Equity shall not be
liable for any error of judgment or mistake of law or for any loss arising out
of any investment or for any act or omission in the execution of securities
transactions for the Index Portfolio, except for willful misfeasance, bad faith
or gross negligence in the performance of its duties, or by reason of reckless
disregard of its obligations and duties thereunder. The Submanagement Agreement
further provides that the services of Mellon Equity to the

                                       34
<PAGE>   60

Index Portfolio are not deemed to be exclusive, Mellon Equity being free to
render investment advisory, administrative and/or other services to others.

     Under the Submanagement Agreement, DSI pays Mellon Equity an investment
submanagement fee equal on an annual basis to 0.07% of the average daily net
assets of the Index Portfolio.

        Prior to October 22, 1997, Mellon Equity managed the assets of the Index
Portfolio pursuant to an investment management agreement with the Index
Portfolio. From October 4, 1996 to November 15, 1999, Mellon Equity was paid an
investment management fee equal on an annual basis to 0.10% of the Index
Portfolio's average daily net assets. For the fiscal years ended July 31, 1997
and 1998, respectively, the Index Portfolio incurred $182,885 and $86,354 in
investment management fees.

ADMINISTRATOR, SUBADMINISTRATOR, TRANSFER AGENT AND CUSTODIAN, AND EXPENSES

ADMINISTRATOR Pursuant to an Administrative Services Agreement dated April 7,
1995 between the Trust and Green Century Capital (the "Administration
Agreement"), Green Century Capital, as the Trust's administrator (the
"Administrator"), provides the Trust with general office facilities and
supervises the overall administration of the Trust, including, among other
responsibilities, the negotiation of contracts and fees with, and the monitoring
of performance and billings of, the Trust's independent contractors and agents;
the preparation and filing of all documents required for compliance by the Trust
with applicable laws and regulations; and arranging for the maintenance of books
and records of the Trust. As described in the Prospectus, the Administrator also
pays, pursuant to the Administration Agreement, all the operating expenses of
each Fund other than the Funds' investment advisory fees, if any, fees under the
Distribution Plan, if any, interest, taxes, brokerage costs and other capital
expenses, expenses of the non-interested Trustees of the Funds (including
counsel fees) and any extraordinary expenses.

        Green Century Capital was founded in 1991 by a partnership of
not-for-profit environmental advocacy organizations for the following purposes:
to provide quality environmentally responsible investment opportunities to the
members of its founding organizations and other environmentally conscious
investors; to generate revenue to support the environmental research and
advocacy work of its founding organizations; and to work in tandem with its
founding organizations to promote greater corporate environmental responsibility
by advocating that companies improve their environmental performance. As do the
advocacy organizations that founded Green Century Capital, Green Century upholds
the right of people to speak for the public interest and corporate
responsibility.

        The Administration Agreement provides that it shall remain in force
until terminated. The Administration Agreement may be terminated as to any Fund
at any time, without the payment of any penalty, by the Board of Trustees of the
Trust or by the Administrator, in each case on not less than 30 days' written
notice to the other party. The Administration Agreement further provides that
the Administrator shall not be liable for any error of judgment or mistake of
law or for any act or omission in the administration or management of the Trust
or the performance of its duties, except for willful misfeasance, bad faith or
gross negligence in the performance of its duties, or by reason of the reckless
disregard of its obligations and duties.

        For such administrative services, the Administrator receives a fee from
the Balanced Fund at a rate

                                       35
<PAGE>   61

such that immediately following any payment to the Administrator, the total
operating expenses of the Balanced Fund (including investment advisory and
distribution fees), on an annual basis, do not exceed 2.50% of the Balanced
Fund's average daily net assets up to $30 million, 2.25% on average net assets
from $30 million to $100 million, and 1.75% on average net assets in excess of
$100 million. The Administrator receives a fee from the Equity Fund at a rate
such that immediately following any payment to the Administrator, the combined
total operating expenses of the Fund and the Index Portfolio (including
investment advisory fees and any amortization of organization expenses), on an
annual basis, do not exceed 1.50% of the Equity Fund's average daily net assets.

        For the fiscal year ended June 30, 1998, the Balanced Fund accrued
administrative services fees aggregating $209,666. For the one-month period
ended July 31, 1998, the Balanced Fund accrued administrative service fees
aggregating $20,597. For the fiscal years ended July 31, 1999 and 2000, the
Balanced Fund accrued administrative fees aggregating $209,905 and $497,991,
respectively. For the fiscal years ended July 31, 1998, 1999 and 2000, the
Equity Fund accrued administrative service fees to the Administrator of the
Trust aggregating $122,190, $281,718 and $469,339, respectively.

SUBADMINISTRATOR Pursuant to a Subadministration Agreement dated July 7, 1997
(the "Subadministration Agreement"), between the Administrator and Sunstone
Financial Group, Inc. ("Sunstone"), Sunstone provides certain day-to-day
administrative services to the Trust, under the supervision and direction of the
Administrator of the Trust. The Subadministration Agreement provides that it
shall continue to July 7, 1998 unless sooner terminated, and thereafter will
continue automatically in effect for successive annual periods until terminated.
The Agreement may be terminated at any time with respect to any one or both
Funds without penalty (i) upon mutual consent of the parties, or (ii) by either
party upon not less than ninety (90) days' written notice.

        The Subadministration Agreement provides further that Sunstone shall not
be liable for any error of judgment or mistake of law or for any loss suffered
by Green Century Capital or the Funds in connection with the matters to which
the Agreement relates, except for a loss resulting from willful misfeasance, bad
faith or gross negligence on its part in the performance of its duties or from
reckless disregard by it of its obligations and duties under the
Subadministration Agreement.

        Sunstone receives a fee from the Administrator (not the Funds) for its
administrative services on behalf of the Administrator, which fee is based on
each Fund's average net assets beginning at the annual rate of 0.175% on the
first $50,000,000 of average net assets and decreasing as assets reach certain
levels, subject to an annual minimum for each Fund of $35,000 in the first year,
$40,000 in the second year, and $50,000 in the third year. Sunstone does not act
or serve in any capacity with respect to the Index Portfolio. For the fiscal
year ended June 30, 1998 and the one month ended July 31, 1998, the
Administrator paid fees of $34,436 and $3,304, respectively, to Sunstone
relating to services performed on behalf of the Balanced Fund. For the fiscal
years ended July 31, 1999 and 2000, the Administrator paid fees of $40,685 and
$59,110, respectively, to Sunstone relating to services performed on behalf of
the Balanced Fund. For the years ended July 31, 1998 1999 and 2000, the
Administrator paid fees of $35,388, $40,685 and $63,524, respectively, to
Sunstone relating to services performed on behalf of the Equity Fund.

        Effective August 1, 2000, at average net assets of each Fund up to
$125,000,000, Sunstone receives an annual base fee of $25,000 per Fund, as well
as a fee based on each Fund's average net assets beginning at the annual rate of
0.11% on the first $50,000,000 of average net assets and decreasing as assets
reach

                                       36
<PAGE>   62

certain levels, subject to an annual minimum fee for each Fund of $40,500. The
minimum annual fee increases 5% each year thereafter. At average net assets of
each Fund greater than $125,000,000, Sunstone receives a fee based on each
Fund's average net assets beginning at the annual rate of 0.13% on the first
$50,000,000 of average net assets and decreasing as assets reach certain levels,
subject to an annual minimum fee for each Fund of $40,500. The minimum annual
fee increases 5% each year thereafter. Sunstone will no longer receive an annual
base fee once each Fund's average net assets reach $125,000,000.


     Prior to July 7, 1997, Signature Broker-Dealer Services, Inc. ("Signature")
served as the subadministrator of the Funds. For the fiscal years ended June 30,
1995, 1996 and 1997, Green Century Capital paid subadministrative services fees
to Signature for its subadministrative services for the Equity Fund and the
Balanced Fund aggregating $4,602, $10,708, and $16,062, respectively. For the
period July 1, 1997 to July 6, 1997, Green Century Capital Management paid
subadministrative services fees to Signature aggregating $273.

TRANSFER AGENT Effective November 16, 1998, the Trust entered into a transfer
agency agreement with Unified Fund Services, Inc. ("Unified") pursuant to which
Unified acts as transfer agent for the Trust (the "Transfer Agent"). Unified
maintains an account for each shareholder of each Fund, performs other transfer
agency functions and acts as dividend disbursing agent for each Fund. Prior to
November 16, 1998, Investors Bank & Trust Company ("IBT") served as transfer
agent for the Trust.

CUSTODIAN Pursuant to a Custodian Agreement with each of the Trust and the Index
Portfolio, IBT also acts as the custodian of the Funds' assets (i.e., cash and
securities or, in the case of the Equity Fund, its interest in the Index
Portfolio) and as the custodian of the Index Portfolio's assets (the
"Custodian"). The Custodian's responsibilities include safeguarding and
controlling the Funds' and the Index Portfolio's cash and securities, handling
the receipt and delivery of securities, determining income and collecting
interest on the Funds' and the Index Portfolio's investments, maintaining books
of original entry for portfolio and fund accounting and other required books and
accounts, and calculating the daily net asset value of shares and interests in
the Fund and the Index Portfolio, respectively. Securities held by the Funds and
the Index Portfolio may be deposited into certain securities depositaries. The
Custodian does not determine the investment policies of the Funds or the Index
Portfolio nor does the Custodian decide which securities the Funds or the Index
Portfolio will buy or sell. The Index Portfolio may, however, invest in
securities of the Custodian and may deal with the Custodian as a principal in
securities transactions. For its services, IBT will receive such compensation as
may from time to time be agreed upon by it and the Funds and the Index
Portfolio, as the case may be.

                                       37
<PAGE>   63

DISTRIBUTION PLAN


        The Trust has adopted a Distribution Plan with respect to the Balanced
Fund in accordance with Rule 12b-1 under the 1940 Act after concluding that
there is a reasonable likelihood that the Distribution Plan will benefit the
Fund and its shareholders. The Trust has not adopted a Distribution Plan with
respect to the Equity Fund. The Distribution Plan provides that the Balanced
Fund shall pay a fee to Sunstone Distribution Services, LLC, as the distributor
of shares of the Balanced Fund (the "Distributor"), at an annual rate not to
exceed 0.25% of the Fund's average daily net assets in anticipation of, or as
reimbursement for expenses (i) of compensating broker-dealers with trail or
maintenance commissions and (ii) of printing prospectuses and reports used for
sales purposes, expenses of the preparation and printing of sales literature and
other such distribution-related expenses. Prior to July 7, 1997, Signature
served as distributor of the shares of the Trust. For the fiscal year ended June
30, 1998, the Balanced Fund accrued distribution fees aggregating $34,944. For
the one-month period ended July 31, 1998, the Balanced Fund accrued distribution
fees aggregating $3,437. For the fiscal years ended July 31, 1999 and 2000, the
Balanced Fund accrued distribution fees aggregating $34,984 (of which $22,911
was spent on advertising and $12,073 was spent on printing and mailing of
prospectuses to other than current shareholders) and $84,443 (of which $46,774
was spent on advertising, $30,981 was spent on printing and mailing prospectuses
to other than current shareholders and $6,688 was spent on other printed
materials), respectively.

        The Distribution Plan will continue in effect indefinitely if such
continuance is specifically approved at least annually by a vote of both a
majority of the Trustees and a majority of the Trustees who are not "interested
persons" (as defined in the 1940 Act) of the Trust and who have no direct or
indirect financial interest in the operation of the Distribution Plan or in any
agreement related to the Plan ("Qualified Trustees"). The Distribution Plan
requires that the Trust shall provide to its Board of Trustees, and its Board of
Trustees shall review, at least quarterly, a written report of the amounts
expended (and the purposes therefor) under the Distribution Plan. The
Distribution Plan further provides that the selection and nomination of the
Qualified Trustees shall be committed to the discretion of the disinterested
Trustees then in office. The Distribution Plan may be terminated at any time by
a vote of a majority of the Qualified Trustees or by a vote of the shareholders
of the Balanced Fund. The Distribution Plan may not be amended to increase
materially the amount of permitted expenses thereunder without the approval of
shareholders and may not be materially amended in any case without a vote of the
majority of both the Trustees and Qualified Trustees. The Distributor will
preserve copies of any plan, agreement or report made pursuant to the
Distribution Plan for a period of not less than six years from the date of the
Plan, and for the first two years the Distributor will preserve such copies in
an easily accessible place.

        The Distributor acts as the agent of the Trust in connection with the
offering of shares of the Balanced Fund and the Equity Fund pursuant to a
Distribution Agreement. After the prospectuses and periodic reports have been
prepared, set in type and mailed to existing shareholders, the Distributor pays
for the printing and distribution of copies thereof which are used in connection
with the offering of shares of the Funds to prospective investors.

FINANCIAL INTERMEDIARIES

Green Century Capital Management may enter into contracts with banks, brokers
and other financial intermediaries ("Financial Intermediary"). When a customer
of the Financial Intermediary purchases or

                                       38
<PAGE>   64

redeems shares through that Financial Intermediary (and/or through designated
intermediaries of the Financial Intermediary) it provides certain services such
as: (1) necessary personnel and facilities to establish and maintain certain
shareholders accounts and records enabling it to hold, as agent, its customers'
shares in its name or its nominee name on the shareholder records of the Green
Century Funds; (2) assists in processing purchase and redemption transactions;
(3) arranges for the wiring of funds; (4)transmits and receives funds in
connection with customer orders to purchase or redeem shares of the Funds; (5)
provides periodic statements showing a customer's account balance and, to the
extent practicable, integrates such information with information concerning
other customer transactions otherwise effected with or through it; (6)
furnishes, either separately or on an integrated basis with other reports sent
to a customer, monthly and annual statements and confirmations of all purchases
and redemptions of Fund shares in a customer's account; (7) transmits proxy
statements, annual reports, updated prospectuses and other communications from
the Green Century Funds to its customers; (8) and receives, tabulates and
transmits to the Green Century Funds proxies executed by its customers with
respect to meetings of shareholders of the Funds. For these services, the
Financial Intermediary receives fees from Green Century Capital Management as
agreed upon from time to time between Green Century Capital Management and such
Financial Intermediary.


An investor who has an account with a Financial Intermediary may place purchase
orders for Fund shares with the Green Century Funds through that Financial
Intermediary. The Funds will be deemed to have received the purchase or
redemption order for Fund shares when a Financial Intermediary or its designated
intermediary accepts the purchase or redemption order and such orders will be
priced at each Fund's net asset value after the acceptance of the purchase or
redemption order by a Financial Intermediary or its designated intermediary.
Each Financial Intermediary may establish and amend from time to time a minimum
initial and a minimum subsequent purchase requirement for its customers. A
transaction or other fee may be charged by a Financial Intermediary on the
purchase of Fund shares. Each Financial Intermediary may establish its own
policy with respect to the reinvestment of dividends and capital gains
distributions in additional Fund shares. Shares held by a Financial Intermediary
on behalf of a shareholder must be redeemed through that Financial Intermediary.
A transaction or other fee may be charged by a Financial Intermediary on the
redemption of Fund shares.


NET ASSET VALUE; REDEMPTION IN KIND

        The net asset value of each Fund's shares is determined each day the New
York Stock Exchange is open for trading ("Fund Business Day"). (As of the date
of this Statement of Additional Information, such Exchange is open for trading
every weekday except for the following holidays: New Year's Day, Martin Luther
King, Jr. Day, Presidents' Day, Good Friday, Memorial Day, Independence Day,
Labor Day, Thanksgiving Day and Christmas Day.) This determination of net asset
value of shares of the Fund is made once during each such day as of the close of
the New York Stock Exchange (usually 4:00 p.m., Eastern time) in the case of the
Funds by deducting the amount of the Fund's liabilities from the value of its
assets and dividing the difference by the number of shares of the Fund
outstanding at the time the determination is made.

        Valuation Procedures: Balanced Fund--In valuing the Balanced Fund's
assets, a security listed on the New York Stock Exchange (and not subject to
restrictions against sale by the Fund on such Exchange) will be valued at its
last sale price on such Exchange. Lacking any sales, the security will be valued
at the mean

                                       39
<PAGE>   65

between the closing asked price and the closing bid price. Securities listed on
other exchanges (and not subject to restriction against sale by the Fund on such
exchanges) will be similarly valued, using quotations on the exchange on which
the security is traded most extensively. Unlisted securities which are quoted on
the NASD National Market System, for which there have been sales of such
securities, will be valued at the last sale price reported on such system. If
there are no such sales, the value will be the high or "inside" bid, which is
the bid supplied by the NASD on its NASDAQ System for such securities in the
over-the-counter market. The value of such securities quoted on the NASDAQ
System, but not listed on the National Market System, will be valued at the high
or "inside" bid. Unlisted securities which are not quoted on the NASDAQ System
and for which over-the-counter market quotations are readily available will be
valued at the mean between the current bid and asked prices for such securities
in the over-the-counter market. Other unlisted securities (and listed securities
subject to restriction on sale) will be valued at their fair value as determined
in good faith by the Trustees although the actual calculation may be done by
others. Short-term corporate investments with remaining maturities of sixty days
or less are valued at amortized cost. Open futures contracts are valued at the
most recent settlement price, unless such price does not reflect the fair value
of the contract, in which case such positions will be valued by or under the
direction of the Trustees.

        Subject to the Trust's compliance with applicable regulations, the Trust
has reserved the right to pay the redemption price of shares of the Balanced
Fund, either totally or partially, by a distribution in kind of portfolio
securities (instead of cash). The securities so distributed would be valued at
the same amount as that assigned to them in calculating the net asset value for
the shares being sold. If a shareholder received a distribution in kind, the
shareholder could incur brokerage or other charges in converting the securities
to cash. The Trust has elected, however, to be governed by Rule 18f-1 under the
1940 Act, as a result of which the Trust is obligated with respect to any one
investor during any 90 day period to redeem shares of the Balanced Fund solely
in cash up to the lesser of $250,000 or 1% of the Fund's net assets at the
beginning of such 90 day period.

        Valuation Procedures: Equity Fund and Index Portfolio--The value of the
Index Portfolio's net assets (i.e., the value of its securities and other assets
less its liabilities, including expenses payable or accrued) is determined at
the same time and on the same day as the Equity Fund determines its net asset
value per share. The net asset value of the Equity Fund's investment in the
Index Portfolio is equal to the Fund's pro rata share of the total investment of
the Fund and of other investors in the Index Portfolio less the Fund's pro rata
share of the Index Portfolio's liabilities. Equity securities held by the Index
Portfolio are valued at the last sale price on the exchange on which they are
primarily traded or on the NASDAQ system for unlisted national market issues, or
at the last quoted bid price for securities in which there were no sales during
the day or for unlisted securities not reported on the NASDAQ system. If the
Index Portfolio purchases option contracts, such option contracts which are
traded on commodities or securities exchanges are normally valued at the
settlement price on the exchange on which they are traded. Short-term
obligations with remaining maturities of less than sixty days are valued at
amortized cost, which constitutes fair value as determined by the Board of
Trustees of the Index Portfolio. Index Portfolio securities (other than
short-term obligations with remaining maturities of less than sixty days) for
which there are no such quotations or valuations are valued at fair value as
determined in good faith by or at the direction of the Index Portfolio's Board
of Trustees.

                                       40
<PAGE>   66

PERFORMANCE ADVERTISING

        Equity Fund and Balanced Fund--The average annual total rate of return
of the Funds will be calculated for any period by (a) dividing (i) the sum of
the aggregate net asset value per share on the last day of the period of shares
purchased with a $1,000 payment on the first day of the period and the aggregate
net asset value per share on the last day of the period of shares purchasable
with dividends and capital gains distributions declared during such period with
respect to shares purchased on the first day of such period and with respect to
shares purchased with such dividends and capital gains distributions, by (ii)
$1,000, (b) raising the quotient to a power equal to 1 divided by the number of
years in the period, and (c) subtracting 1 from the result.

        The total rate of return of the Funds for any specified period will be
calculated by (a) dividing (i) the sum of the aggregate net asset value per
share on the last day of the period of shares purchased with a $1,000 payment on
the first day of the period and the aggregate net asset value per share on the
last day of the period of shares purchasable with dividends and capital gains
distributions declared during such period with respect to shares purchased on
the first day of such period and with respect to shares purchased with such
dividends and capital gains distributions, by (ii) $1,000, and (b) subtracting 1
from the result.


        For the period March 18, 1992 (commencement of operations) through July
31, 2000, the average annual total return of the Balanced Fund was 15.56%. The
Balanced Fund's average annual total return for the one and five year periods
ended July 31, 2000 were 93.54% and 23.69%, respectively.

        The Equity Fund's total rate of return for the fiscal year ended July
31, 2000 was 7.62%. The Fund's average annual total return for the five years
ended July 31, 2000 was 22.63%. The Fund's average annual total return for the
fiscal periods since the Index Portfolio's commencement of investment operations
(June 3, 1991) through July 31, 2000 was 17.22%. The Equity Fund, which
commenced investment operations on September 13, 1995, invests all of its Assets
in the Index Portfolio, a separate registered investment company which commenced
investment operations on June 3, 1991 and commenced operations on August 10,
1990. Consistent with applicable regulatory guidance, performance for the period
from June 3, 1991 to the commencement of operations of the Equity Fund will
reflect the investment performance of the Index Portfolio. The performance for
this prior period reflects the deduction of the charges and expenses of the
Equity Fund set forth in the Expense Table in the Prospectus.


        Total rate of return and yield information with respect to the Social
Index will be computed in the same fashion as set forth above with respect to
the Equity Fund, except that for purposes of this computation an investment will
be assumed to have been made in a portfolio consisting of all of the stocks
comprising the Social Index weighted in accordance with the weightings of the
stocks comprising the Social Index. Performance information with respect to the
Social Index will not take into account brokerage commission and other
transaction costs which will be incurred by the Index Portfolio.

        The total rate of return should not be considered a representation of
the total rate of return of the respective Fund or the Index Portfolio in the
future since the total rate of return is not fixed. Actual total rates of return
will depend on changes in the market value of, and dividends and interest
received from, the investments held by the Funds or Index Portfolio and expenses
of the Funds and the Index Portfolio during the

                                       41
<PAGE>   67

period. Performance is historical and will fluctuate. An investor's shares when
redeemed may be worth more or less than their original cost.

        Total rate of return information may be useful for reviewing the
performance of a Fund or the Index Portfolio and for providing a basis for
comparison with other investment alternatives. However, unlike bank deposits or
other investments which pay a fixed yield for a stated period of time, total
rate of return fluctuates, and this should be considered when reviewing
performance or making comparisons.

        Any current "yield" quotation of the Funds shall consist of an
annualized historical yield, carried to at least the nearest hundredth of one
percent, based on a 30 calendar day or one-month period and shall be calculated
by (a) raising to the sixth power the sum of 1 plus the quotient obtained by
dividing the Fund's net investment income earned during the period by the
product of the average daily number of shares outstanding during the period that
were entitled to receive dividends and the maximum offering price per share on
the last day of the period, (b) subtracting 1 from the result, and (c)
multiplying the result by 2.

        The performance of the Funds may be compared in publications to the
performance of various indices and investments for which reliable performance
data is available. The performance of the Funds may also be compared in
publications to averages, performance rankings, or other information prepared by
recognized mutual fund statistical services.


FEDERAL TAXES

        Each year, the Trust intends to qualify each Fund and elect that each
Fund be treated as a separate "regulated investment company" under Subchapter M
of the Internal Revenue Code of 1986, as amended (the "Code"). Under Subchapter
M of the Code each Fund will not be subject to federal income taxes on amounts
distributed to shareholders. As long as each Fund qualifies as a "regulated
investment company" under the Code, the Fund will not be required to pay
Massachusetts income or excise taxes.

        Qualification as a regulated investment company under the Code requires,
among other things, that (a) at least 90% of a Fund's annual gross income,
without offset for losses from the sale or other disposition of securities, be
derived from dividends, interest, payments with respect to securities loans and
gains from the sale or other disposition of stock or securities or foreign
currencies or other income derived with respect to its business of investing in
such securities; and (b) the holdings of a Fund are diversified so that, at the
end of each quarter of its taxable year, (i) at least 50% of the market value of
a Fund's assets is represented by cash and cash items, U.S. Government
securities, securities of other regulated investment companies and other
securities limited in respect of any one issuer to an amount not greater than 5%
of the Fund's assets and 10% of the outstanding voting securities of such
issuer, and (ii) not more than 25% of the value of a Fund's assets is invested
in the securities of any one issuer (other than U.S. Government securities and
securities of other regulated investment companies). In addition, in order not
to be subject to federal income tax, at least 90% of a Fund's net investment
income and net short-term capital gains earned in each year must be distributed
to the Fund's shareholders. If a Fund should fail to qualify as a "regulated
investment company" in any year, the Fund would incur a regular corporate
federal income tax upon its taxable income and Fund distributions would
generally be taxable as ordinary dividend income to the shareholders.

                                       42
<PAGE>   68


     Shareholders of the Funds will normally have to pay federal income taxes
and any state or local income taxes on the dividends and capital gain
distributions they receive from the Fund. Dividends from ordinary income and any
distributions from net short-term capital gains are taxable to shareholders as
ordinary income for federal income tax purposes, whether the distributions are
made in cash or in additional shares. A portion of the Funds' net investment
income and short-term capital gains dividends is normally eligible for the
dividends received deduction for corporations if the recipient otherwise
qualifies for that deduction with respect to its holding of Fund shares.
Availability of the deduction for a particular corporate shareholder is subject
to certain limitations, and deducted amounts may be subject to the alternative
minimum tax and result in certain basis adjustments. Distributions of net
capital gains, whether made in cash or in additional shares, may receive
favorable tax treatment without regard to the length of time the shareholders
have held their shares. Any Fund dividend that is declared in October, November,
or December of any calendar year, that is payable to shareholders of record in
such a month, and that is paid the following January will be treated as if
received by the shareholders on December 31 of the year in which the divided is
declared. The Funds will notify shareholders regarding the federal tax status of
its distributions after the end of each calendar year.

     Gains or losses on sales of securities for the Funds may receive favorable
tax treatment if the securities have been held by it longer than the applicable
holding period except in certain cases where a put has been acquired or a call
has been written thereon for the Fund. Other gains or losses on the sale of
securities will be short-term capital gains or losses.

     Options--Gains and losses on the sale, lapse or other termination of
options on securities will generally be treated as gains and losses from the
sale of securities. If an option written for the Balanced Fund or the Index
Portfolio lapses or is terminated through a closing transaction, such as a
repurchase for the Balanced Fund or the Index Portfolio of the option from its
holder, the Balanced Fund or the Index Portfolio may realize a short-term
capital gain or loss, depending on whether the premium income is greater or less
than the amount paid in the closing transaction. If securities are sold for the
Balanced Fund or the Index Portfolio pursuant to the exercise of a call option
written for it, the premium received will be added to the sale price of the
securities delivered in determining the amount of gain or loss on the sale.

     Certain option contracts held for the Balanced Fund and the Index Portfolio
at the end of each fiscal year will be required to be "marked to market" for
federal income tax purposes; that is, treated as having been sold at market
value. Sixty percent of any gain or loss recognized on these deemed sales and on
actual dispositions will be treated as long-term capital gain or loss, and the
remainder will be treated as short-term capital gain or loss regardless of how
long the Balanced Fund or the Index Portfolio has held such options. The
Balanced Fund or the Index Portfolio may be required to defer the recognition of
losses on stock or securities to the extent of any unrecognized gain on
offsetting positions held for it.

     Redemption of Shares--Any gain or loss realized on the redemption of Fund
shares by a shareholder who is not a dealer in securities will be treated as
long-term capital gain or loss if the shares have been held for more than the
applicable holding period, and otherwise as short-term capital gain or loss.
However, any loss realized by a shareholder upon the redemption of Fund shares
held one year or less will be treated as a long-term capital loss to the extent
of any long-term capital gains distributions received by the shareholder with
respect to such shares. Additionally, any loss realized on a redemption or
exchange of Fund shares will be disallowed to the extent the shares disposed of
are replaced within a period of 61 days beginning 30 days before such
disposition, such as pursuant to reinvestment of a dividend or capital gains
distribution in Fund shares.

                                       43

<PAGE>   69


     Investment Activities--The Balanced Fund's and Index Portfolio's activities
in options may be restricted by the requirements of the Internal Revenue Code
for qualification as a regulated investment company. In addition, the Balanced
Fund's and the Index Portfolio's activities involving futures contracts and
forward contracts may be limited by the requirements of Subchapter M of the
Internal Revenue Code for qualification as a regulated investment company.

DESCRIPTION OF SHARES, VOTING RIGHTS AND LIABILITIES

     The Trust's Declaration of Trust permits the Trustees to issue an unlimited
number of full and fractional Shares of Beneficial Interest (par value $0.01 per
share) of each series and to divide or combine the shares into a greater or
lesser number of shares of that series without thereby changing the
proportionate beneficial interests in that series. The Funds are the only
current series of shares of the Trust, and the Trust has reserved the right to
create and issue additional series of shares. Each share of a series represents
an equal proportionate interest in that series with each other share of that
series. The shares of each series participate equally in the earnings, dividends
and assets of the particular series. Shares of each series are entitled to vote
separately to approve advisory agreements or changes in fundamental investment
policy, but shares of all series may vote together in the election or selection
of Trustees, principal underwriters and accountants. Upon liquidation or
dissolution of a series, shareholders of that series would be entitled to share
pro rata in the net assets of that series available for distribution to
shareholders.

     Shareholders are entitled to one vote for each share held on matters on
which they are entitled to vote. The Trust is not required and has no present
intention to hold annual meetings of shareholders, but the Trust will hold
special meetings of shareholders when in the judgment of the Trustees it is
necessary or desirable to submit matters for a shareholder vote. Shareholders
have under certain circumstances (i.e., upon application and submission of
certain specified documents to the Trustees by a specified number of
shareholders) the right to communicate with other shareholders in connection
with requesting a meeting of shareholders for the purpose of removing one or
more Trustees. Shareholders also have under certain circumstances the right to
remove one or more Trustees without a meeting by a declaration in writing by a
specified number of shareholders. No material amendment may be made to the
Trust's Declaration of Trust without the affirmative vote of the holders of a
majority of the outstanding shares of each series affected by the amendment.
(See "Investment Objectives, Policies and Restrictions Investment
Restrictions".) Shares have no preference, preemptive, conversion or similar
rights. Shareholders in the Fund do not have cumulative voting rights, and
shareholders owning more than 50% of the outstanding shares of the Trust may
elect all of the Trustees if they chose to do so. Shares, when issued, are fully
paid and nonassessable, except as set forth below. The Fund may be terminated
(i) upon sale of its assets, if approved by the vote of the holders of two
thirds of its outstanding shares, except that if the Board of Trustees
recommends such sale of assets, the approval by vote of the majority of the
Fund's outstanding shares will be sufficient, or (ii) by the vote of the holders
of the majority of the Fund's outstanding shares, or (iii) by the Trustees of
the Trust by written notice to the shareholders. If not so terminated, each Fund
will continue indefinitely.

     The Trust is an entity of the type commonly known as a "Massachusetts
business trust". Under Massachusetts law, shareholders of such a business trust
may, under certain circumstances, be held personally liable as partners for its
obligations and liabilities. However, the Declaration of Trust contains an

                                       44

<PAGE>   70


express disclaimer of shareholder liability for acts or obligations of the Trust
and provides for indemnification and reimbursement of expenses out of Trust
property for any shareholder held personally liable for the obligations of the
Trust. The Declaration of Trust also provides that the Trust shall maintain
appropriate insurance (for example, fidelity bonding and errors and omissions
insurance) for the protection of the Trust, its shareholders, Trustees,
officers, employees and agents covering 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 existed and the Trust itself was unable to meet its obligations.

     The Declaration of Trust further provides that obligations of the Trust are
not binding upon the Trustees individually but only upon the property of the
Trust and that the Trustees will not be liable for any action or failure to act,
but nothing in the Declaration of Trust protects a Trustee against any liability
to which he would otherwise be subject by reason of willful misfeasance, bad
faith, gross negligence, or reckless disregard of the duties involved in the
conduct of his office.

     The Index Portfolio is organized as a trust under the laws of the State of
New York. The Equity Fund and other entities investing in the Index Portfolio
(e.g., other investment companies and common and commingled trust funds) are
each liable for all obligations of the Index Portfolio.

     Each investor in the Index Portfolio, including the Equity Fund, may add to
or reduce its investment in the Index Portfolio on each Fund Business Day. At
the close of each such business day, the value of each investor's interest in
the Index Portfolio will be determined by multiplying the net asset value of the
Index Portfolio by the percentage representing that investor's share of the
aggregate beneficial interests in the Index Portfolio effective for that day.
Any additions or withdrawals, which are to be effected as of the close of
business on that day, will then be effected. The investor's percentage of the
aggregate beneficial interests in the Index Portfolio will then be re-computed
as the percentage equal to the fraction (i) the numerator of which is the value
of such investor's investment in the Index Portfolio as of the close of business
on such day plus or minus, as the case may be, the amount of any additions to or
withdrawals from the investor's investment in the Index Portfolio effected as of
the close of business on such day, and (ii) the denominator of which is the
aggregate net asset value of the Index Portfolio as of the close of business on
such day plus or minus, as the case may be, the amount of the net additions to
or withdrawals from the aggregate investments in the Index Portfolio by all
investors in the Index Portfolio. The percentage so determined will then be
applied to determine the value of the investor's interest in the Index Portfolio
as of the close of business on the following Fund Business Day.

     The Trustees of Green Century have adopted the following policy with
respect to voting shares of the Index Portfolio held by the Equity Fund:
Whenever the Equity Fund is requested to vote on a matter pertaining to the
Index Portfolio, the Trustees will, in their discretion and in accordance with
applicable law, either seek instructions from shareholders of the Equity Fund
and vote the shares only in accordance with such instructions, or vote the
shares held by the Equity Fund in the same proportion as the vote of all other
holders of shares in the Index Portfolio. Whenever the Trustees determine to
seek the instructions of the Equity Fund shareholders, the Equity Fund will hold
a meeting of its shareholders and, at the meeting of investors in the Index
Portfolio, the Equity Fund will cast all of its votes in the same proportion as
the votes of the Equity Fund's shareholders. Equity Fund shareholders who do not
vote will not affect the Equity Fund's votes at the Index Portfolio meeting.
Shares of the Equity Fund for which no voting instructions have been received
will be voted by the Trustees in the same proportion as the shares for which it
receives


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voting instructions.

PORTFOLIO TRANSACTIONS AND BROKERAGE COMMISSIONS

                                  BALANCED FUND

     Specific decisions to purchase or sell securities for the Fund are made by
a portfolio manager who is an employee of the Subadviser and who is appointed
and supervised by its senior officers. Changes in the Fund's investments are
reviewed by the Board of Trustees. The Fund's portfolio manager may serve other
clients of the respective Subadviser in a similar capacity.

     Decisions concerning the execution of portfolio security transactions of
the Balanced Fund, including the selection of the market and the broker-dealer
firm, are made by the Subadviser. The Subadviser is also responsible for the
execution of transactions for all other accounts managed by it.

     The Subadviser places the security transactions of the Balanced Fund and of
all other accounts managed by it for execution with many broker-dealer firms.
The Subadviser uses its best efforts to obtain execution of portfolio
transactions at prices which are advantageous to the Fund and (when a disclosed
commission is being charged) at reasonably competitive commission rates. In
seeking such execution, the Subadviser will use its best judgement in evaluating
the terms of a transaction, and will give consideration to various relevant
factors, including without limitation the size and type of the transaction, the
general execution and operational capabilities of the broker-dealer, the nature
and character of the market for the security, the confidentiality, speed and
certainty of effective execution required for the transaction, the reputation,
reliability, experience and financial condition of the broker-dealer, the value
and quality of services rendered by the broker-dealer in other transactions, and
the reasonableness of the commission, if any. Transactions on United States
stock exchanges and other agency transactions involve the payment by the Fund of
negotiated brokerage commissions. Such commissions vary among different
broker-dealer firms, and a particular broker-dealer may charge different
commissions according to such factors as the difficulty and size of the
transaction and the volume of business done with such broker-dealer.
Transactions in foreign securities usually involve the payment of fixed
brokerage commissions, which are generally higher than those in the United
States. There is generally no stated commission in the case of securities traded
in the over-the-counter markets, but the price paid or received by the Fund
usually includes an undisclosed dealer markup or markdown. In an underwritten
offering the price paid by the Fund often includes a disclosed fixed commission
or discount retained by the underwriter or dealer. Although commissions paid on
portfolio security transactions will, in the judgement of the Subadviser, be
reasonable in relation to the value of the services provided, commissions
exceeding those which another firm might charge may be paid to broker-dealers
who were selected to execute transactions on behalf of the Fund and the
Subadviser's other clients in part for providing brokerage and research services
to the Subadviser.

     As authorized in Section 28(e) of the Securities Exchange Act of 1934, a
broker or dealer who executes a portfolio transaction on behalf of the Balanced
Fund may receive a commission which is in excess of the amount of commission
another broker or dealer would have charged for effecting that transaction if
the Subadviser determines in good faith that such commission was reasonable in
relation to the value of the brokerage and research services provided. This
determination may be made on the basis of either that


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<PAGE>   72


particular transaction or on the basis of the overall responsibilities which the
Subadviser and its affiliates have for accounts over which they exercise
investment discretion. In making any such determination, the Subadviser will not
attempt to place a specific dollar value on the brokerage and research services
provided or to determine what portion of the commission should be related to
such services. Brokerage and research services may include advice as to the
value of securities, the advisability of investing in, purchasing, or selling
securities, and the availability of securities or purchasers or sellers of
securities; furnishing analyses and reports concerning issuers, industries,
securities, economic factors and trends, portfolio strategy and the performance
of accounts; and effecting securities transactions and performing functions
incidental thereto (such as clearance and settlement); and the "Research
Services" referred to in the next paragraph.

     It is a common practice in the investment advisory industry for the
advisers of investment companies, institutions and other investors to receive
research, statistical and quotation services, data, information and other
services, products and materials which assists such advisers in the performance
of their investment responsibilities ("Research Services") from broker-dealer
firms which execute portfolio transactions for the clients of such advisers and
from third parties with which these broker-dealers have arrangements. Consistent
with this practice, the Subadviser receives Research Services from many
broker-dealer firms with which the Subadviser places the Fund transactions and
from third parties which with these broker-dealers have arrangements. These
Research Services include such matters as general economic and market reviews,
industry and company reviews, evaluations of securities and portfolio strategies
and transactions, recommendations as to the purchase and sale of securities and
other portfolio transactions, financial, industry and trade publications, news
and information services, pricing and quotation equipment and services, and
research oriented computer hardware, software, data bases and services. Any
particular Research Service obtained through a broker-dealer may be used by the
Subadviser in connection with client accounts other than those accounts which
pay commissions to such broker-dealer. Any such Research Service may be broadly
useful and of value to the Subadviser in rendering investment advisory services
to all or a significant portion of its clients, or may be relevant and useful
for the management of only one client's account or of a few clients' accounts,
or may be useful for the management of merely a segment of certain clients'
accounts, regardless of whether any such account or accounts paid commissions to
the broker-dealer through which such Research Service was obtained. The advisory
fee paid by the Balanced Fund is not reduced because the Subadviser receives
such Research Services. The Subadviser evaluates the nature and quality of the
various Research Services obtained through broker-dealer firms and attempts to
allocate sufficient commissions to such firms to ensure the continued receipt of
Research Services which the Subadviser believes are useful or of value to it
rendering investment advisory services to its clients.


     Securities considered as investments for the Balanced Fund may also be
appropriate for other investment accounts managed by the Subadviser or its
affiliates. The Subadviser will attempt to allocate equitably portfolio security
transactions among the Fund and the portfolios of its other investment accounts
whenever decisions are made to purchase or sell securities by the Fund and one
or more of such other accounts simultaneously. In making such allocations, the
main factors to be considered are the respective investment objectives of the
Fund and such other accounts, the relative size of portfolio holdings of the
same or comparable securities, the availability of cash for investment by the
Fund and such accounts, the size of investment commitments generally held by the
Fund and such accounts and the opinions of the persons responsible for
recommending investments to the Fund and such accounts. While this procedure
could have a detrimental effect on the price or amount of the securities
available to the Fund from time to time, it is the


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<PAGE>   73


opinion of the Trustees of the Trust and the Fund that the benefits available
from the Subadviser organization outweigh any disadvantage that may arise from
exposure to simultaneous transactions.


     For the fiscal year ended June 30, 1998, the Balanced Fund paid brokerage
commissions aggregating $33,721. For the one-month period ended July 31, 1998,
the Balanced Fund paid brokerage commissions aggregating $1,701. For the fiscal
years ended July 31, 1999 and 2000, the Balanced Fund paid brokerage commissions
aggregating $39,909 and $187,587, respectively. Approximately 50% of the
brokerage commissions were allocated primarily on the basis of research services
provided for each such period.

     The portfolio turnover rate is the ratio of the lesser of sales or
purchases to the monthly average value of the portfolio (excluding from both the
numerator and the denominator all securities with maturities at the time of
acquisition of one year or less). Higher levels of Fund activity result in
higher transaction costs and may also result in taxes on realized capital gains
to be borne by the Fund's shareholders. Purchases and sales are made for the
Fund whenever necessary, in management's opinion, to meet the Fund's objective.
The portfolio turnover rate of the Balanced Fund for the fiscal year ended June
30, 1998 was 96%. The portfolio turnover rate for the Balanced Fund for the
one-month period ended July 31, 1998 was 4%. The portfolio turnover rates for
the Balanced Fund for the fiscal years ended July 31, 1999 and 2000 were 91% and
116%, respectively.

                         EQUITY FUND AND INDEX PORTFOLIO

     Specific decisions to purchase or sell securities for the Index Portfolio
are made by a portfolio manager who is an employee of Mellon Equity and who is
appointed and supervised by its senior officers. Changes in the Index
Portfolio's investments are reviewed by its Board of Trustees. The portfolio
manager of the Index Portfolio may serve other clients of Mellon Equity in a
similar capacity.

     Frequent changes in the Index Portfolio's holdings may result from the
policy of attempting to correlate the Index Portfolio's securities holdings with
the composition of the Social Index, and the frequency of such changes will
increase as the rate and volume of purchases and redemptions of shares of the
Index Portfolio increases. The annual portfolio turnover rates of the Index
Portfolio for the fiscal years ended July 31, 1998, 1999 and 2000 were 5%, 8%
and 9%, respectively.


     The Index Portfolio's primary consideration in placing securities
transactions with broker-dealers for execution is to obtain and maintain the
availability of execution at the most favorable prices and in the most effective
manner possible. Mellon Equity attempts to achieve this result by selecting
broker-dealers to execute transactions on behalf of the Index Portfolio and
other clients of Mellon Equity on the basis of their professional capability,
the value and quality of their brokerage services, and the level of their
brokerage commissions. In the case of securities traded in the over-the-counter
market (where no stated commissions are paid but the prices include a dealer's
markup or markdown), Mellon Equity normally seeks to deal directly with the
primary market makers, unless in its opinion, best execution is available
elsewhere. In the case of securities purchased from underwriters, the cost of
such securities generally includes a fixed underwriting commission or
concession. From time to time, soliciting dealer fees are available to Mellon
Equity on the tender of the Index Portfolio's securities in so-called tender or
exchange offers. Such soliciting dealer fees are in effect recaptured for the
Index Portfolio by Mellon Equity. At present no other recapture arrangements are
in effect. Consistent with the foregoing primary consideration, the Rules of
Fair Practice of the National Association of Securities Dealers, Inc. and such
other policies as the Trustees of the Index Portfolio may determine, Mellon
Equity may consider sales of shares of the Equity Fund and of securities of
other investors in the Index Portfolio as a factor


                                       48

<PAGE>   74


in the selection of broker-dealers to execute the Index Portfolio's securities
transactions. Neither the Index Portfolio nor the Equity Fund will engage in
brokerage transactions with DSI, Mellon Equity or Green Century Capital or any
of their respective affiliates or any affiliate of the Equity Fund or the Index
Portfolio.

     Under the Submanagement Agreement and as permitted by Section 28(e) of the
Securities Exchange Act of 1934, Mellon Equity may cause the Index Portfolio to
pay a broker-dealer acting on an agency basis which provides brokerage and
research services to Mellon Equity or DSI an amount of commission for effecting
a securities transaction for the Index Portfolio in excess of the amount other
broker-dealers would have charged for the transaction if Mellon Equity
determines in good faith that the greater commission is reasonable in relation
to the value of the brokerage and research services provided by the executing
broker-dealer viewed in terms of either a particular transaction or Mellon
Equity's or DSI's overall responsibilities to the Index Portfolio or to its
other clients. Not all of such services are useful or of value in advising the
Index Portfolio.

     The term "brokerage and research services" includes advice as to the value
of securities, the advisability of investing in, purchasing, or selling
securities, and the availability of securities or of purchasers or sellers of
securities; furnishing analyses and reports concerning issues, industries,
securities, economic factors and trends, portfolio strategy and the performance
of accounts; and effecting securities transactions and performing functions
incidental thereto such as clearance and settlement. However, because of the
Index Portfolio's policy of investing in accordance with the Social Index,
Mellon Equity and DSI currently intend to make only a limited use of such
brokerage and research services.

     Although commissions paid on every transaction will, in the judgment of
Mellon Equity, be reasonable in relation to the value of the brokerage services
provided, commissions exceeding those which another broker might charge may be
paid to broker-dealers who were selected to execute transactions on behalf of
the Index Portfolio and Mellon Equity's or DSI's other clients in part for
providing advice as to the availability of securities or of purchasers or
sellers of securities and services in effecting securities transactions and
performing functions incidental thereto such as clearance and settlement.
Certain broker-dealers may be willing to furnish statistical, research and other
factual information or services to Mellon Equity or DSI for no consideration
other than brokerage or underwriting commissions.

     Mellon Equity and DSI attempt to evaluate the quality of research provided
by brokers. Mellon Equity and DSI sometimes use evaluations resulting from this
effort as a consideration in the selection of brokers to execute portfolio
transactions. However, neither Mellon Equity nor DSI is able to quantify the
amount of commissions which are paid as a result of such research because a
substantial number of transactions are effected through brokers which provide
research but which are selected principally because of their execution
capabilities.


     The fees that the Index Portfolio pays to Mellon Equity and DSI will not be
reduced as a consequence of the Index Portfolio's receipt of brokerage and
research services. To the extent the Index Portfolio's securities transactions
are used to obtain brokerage and research services, the brokerage commissions
paid by the Index Portfolio will exceed those that might otherwise be paid for
such portfolio transactions and research, by an amount which cannot be presently
determined. Such services may be useful and of value to Mellon Equity or DSI in
serving both the Index Portfolio and other clients and, conversely, such
services obtained by the placement of brokerage business of other clients may be
useful to Mellon Equity or DSI in carrying out its obligations to the Index
Portfolio. While such services are not expected to reduce the expenses of Mellon
Equity or DSI, Mellon Equity or DSI would, through use of the services, avoid
the additional expenses which


                                       49

<PAGE>   75


would be incurred if it should attempt to develop comparable information through
its own staff. For the fiscal years ended July 31, 1998, 1999 and 2000, the
Index Portfolio paid brokerage commissions of $175,344, $327,338 and $256,045,
respectively. For the fiscal years ended July 31, 1998, 1999 and 2000 the Equity
Fund paid no brokerage commissions.


     In certain instances there may be securities which are suitable for the
Index Portfolio as well as for one or more of Mellon Equity's or DSI's other
clients. Investment decisions for the Index Portfolio and for Mellon Equity's or
DSI's other clients are made with a view to achieving their respective
investment objectives. It may develop that a particular security is bought or
sold for only one client even though it might be held by, or bought or sold for,
other clients. Likewise, a particular security may be bought for one or more
clients when one or more clients are selling that same security. Some
simultaneous transactions are inevitable when several clients receive investment
advice from the same investment adviser, particularly when the same security is
suitable for the investment objectives of more than one client. When two or more
clients are simultaneously engaged in the purchase or sale of the same security,
the securities are allocated among clients in a manner believed to be equitable
to each. It is recognized that in some cases this system could have a
detrimental effect on the price or volume of the security as far as the Index
Portfolio is concerned. However, it is believed that the ability of the Index
Portfolio to participate in volume transactions will produce better executions
for the Index Portfolio.

INDEPENDENT AUDITORS AND EXPERTS

     KPMG LLP are the independent auditors of the Balanced Fund, the Equity Fund
and the Index Portfolio, providing audit services and review of filings with the
SEC. Prior to July 1, 1995, other auditors served as independent auditors of the
Balanced Fund. The financial statements of the Funds incorporated herein by
reference have been so incorporated by reference in reliance upon the report of
KPMG LLP as experts in accounting and auditing. The financial statements of the
Index Portfolio incorporated herein by reference have been so incorporated by
reference in reliance upon the report of KPMG LLP as experts in accounting and
auditing.

ADDITIONAL INFORMATION

     A shareholder's right to receive payment with respect to any redemption may
be suspended or the payment of the redemption proceeds postponed: (i) during
periods when the New York Stock Exchange is closed for other than weekends and
holidays or when trading on such Exchange is restricted as determined by the SEC
by rule or regulation, (ii) during periods in which an emergency exists which
causes disposal of, or evaluation of the net asset value of, the Funds'
portfolio securities to be unreasonable or impracticable, or (iii) for such
other periods as the SEC may permit.

     With respect to the securities offered by the Funds' Prospectus, this
Statement of Additional Information and the Prospectus do not contain all the
information included in the Registration Statement filed with the SEC under the
1933 Act. Pursuant to the rules and regulations of the SEC, certain portions
have been omitted. The


                                       50

<PAGE>   76


Registration Statement including the exhibits filed therewith may be examined at
the office of the SEC in Washington, D.C.

     Statements contained in this Statement of Additional Information and the
Prospectus concerning the contents of any contract or other document are not
necessarily complete, and in each instance, reference is made to the copy of
such contract or other document filed as an exhibit to the Registration
Statement. Each such statement is qualified in all respects by such reference.

FINANCIAL STATEMENTS


     The financial statements of the Funds and the Index Portfolio as of July
31, 2000 have been filed as part of each of the Fund's annual report with the
Securities and Exchange Commission pursuant to Section 30(b) of the 1940 Act and
Rule 30b2-1 thereunder, are hereby incorporated herein by reference from such
report. Shareholders may obtain a copy of the Annual Report, without charge, by
calling 1-800-93-GREEN




                                       51

<PAGE>   77



APPENDIX - DESCRIPTION OF SECURITIES RATINGS(1)

DESCRIPTION OF MOODY'S INVESTORS SERVICE, INC.'S CORPORATE BOND RATINGS:

AAA: Bonds which are rated Aaa are judged to be of the best quality. They carry
the smallest degree of investment risk and are generally referred to as
"gilt-edged". Interest payments are protected by a large or by an exceptionally
stable margin and principal is secure. While the various protective elements are
likely to change, such changes as can be visualized are most unlikely to impair
the fundamentally strong position of such issues.

AA: Bonds which are rated Aa are judged to be of high quality by all standards.
Together with the Aaa group they comprise what are generally known as high grade
bonds. They are rated lower than the best bonds because margins of protection
may not be as large as in Aaa securities or fluctuations of protective elements
may be of greater amplitude or there may be other elements present which make
the long-term risk appear somewhat larger than in Aaa securities.

A: Bonds which are rated A possess many favorable investment attributes and are
to be considered as upper medium grade obligations. Factors giving security to
principal and interest are considered adequate, but elements may be present
which suggest a susceptibility to impairment sometime in the future.

BAA: Bonds which are rated Baa are considered as medium grade obligations,
(i.e., they are neither highly protected nor poorly secured). Interest payments
and principal security appear adequate for the present, but certain protective
elements may be lacking or may be characteristically unreliable over any great
length of time. Such bonds lack outstanding investment characteristics and in
fact have speculative characteristics as well.

BA: Bonds which are rated Ba are judged to have speculative elements; their
future cannot be considered as well assured. Often the protection of interest
and principal payments may be very moderate and thereby not well safe-guarded
during both good and bad times over the future. Uncertainty of position
characterizes bonds in this class.

B: Bonds which are rated B generally lack characteristics of the desirable
investment. Assurance of interest and principal payments or of maintenance of
other terms of the contract over any long period of time may be small.

CAA: Bonds which are rated Caa are of poor standing. Such issues may be in
default or there may be present elements of danger with respect to principal or
interest.

CA: Bonds which are rated Ca represent obligations which are speculative in a
high degree. Such issues are often in default or have other marked shortcomings.


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C: Bonds which are rated C are the lowest rated class of bonds and issues so
rated can be regarded as having extremely poor prospects of ever attaining any
real investment standing.

NOTE: Moody's applies numerical modifiers, 1, 2 and 3 in each generic rating
classification from Aa through B in its corporate bond rating system. The
modifier 1 indicates that the security ranks in the higher end of its generic
rating category; the modifier 2 indicates a mid range ranking; and the modifier
3 indicates that the issue ranks in the lower end of its generic rating
category.

SHORT-TERM DEBT

Moody's short term debt ratings are opinions of the ability of issuers to repay
punctually promissory obligations not having an original maturity in excess of
one year.

Issuers rated PRIME-1 or P-1 (or supporting institutions) have a superior
ability for repayment of senior short-term debt obligations. Prime-1 or P-1
repayment ability will often be evidenced by many of the following
characteristics:

     -    Leading market positions in well established industries.

     -    High rates of return on funds employed.

     -    Conservative capitalization structure with moderate reliance on debt
          and ample asset protection.

     -    Broad margins in earnings coverage of fixed financial charges and high
          internal cash generation.

     -    Well established access to a range of financial markets and assured
          sources of alternate liquidity.

Issuers rated PRIME-2 or P-2 (or supporting institutions) have a strong ability
for repayment of senior short-term debt obligations. This will normally be
evidenced by many of the characteristics cited above but to a lesser degree.
Earnings trends and coverage ratios, while sound, may be more subject to
variation. Capitalization characteristics, while still appropriate, may be more
affected by external conditions. Ample alternate liquidity is maintained.

DESCRIPTION OF STANDARD & POOR'S RATINGS GROUP'S CORPORATE BOND RATINGS:

INVESTMENT GRADE

AAA: Debt rated AAA has the highest rating assigned by S&P's to a debt
obligation. Capacity to pay interest and repay principal is extremely strong.

AA: Debt rated AA has a very strong capacity to pay interest and repay principal
and differs from the higher rated issues only in small degree.


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A: Debt rated A has a strong capacity to pay interest and repay principal
although it is somewhat more susceptible to the adverse effects of changes in
circumstances and economic conditions than bonds in higher rated categories.

BBB: Debt rated BBB is regarded as having an adequate capacity to pay interest
and repay principal. Whereas it normally exhibits adequate protection
parameters, adverse economic conditions or changing circumstances are more
likely to lead to a weakened capacity to pay interest and repay principal for
debt in this category than in higher rated categories.

SPECULATIVE GRADE

Debt rated BB, B, CCC, CC, and C is regarded as having predominantly speculative
characteristics with respect to capacity to pay interest and repay principal. BB
indicates the least degree of speculation and C the highest. While such debt
will likely have some quality and protective characteristics, these are
outweighed by large uncertainties or major exposures to adverse conditions.

BB: Debt rated BB has less near-term vulnerability to default than other
speculative issues. However, it faces major ongoing uncertainties or exposure to
adverse business, financial, or economic conditions which could lead to
inadequate capacity to meet timely interest and principal payments. The BB
rating category is also used for debt subordinated to senior debt that is
assigned an actual or implied BBB- rating.

B: Debt rated B has a greater vulnerability to default but currently has the
capacity to meet interest payments and principal repayments. Adverse business,
financial, or economic conditions will likely impair capacity or willingness to
pay interest and repay principal.

The B rating category is also used for debt subordinated to senior debt that is
assigned an actual or implied BB or BB- rating.

CCC: Debt rated CCC has a currently identifiable vulnerability to default, and
is dependent upon favorable business, financial, and economic conditions to meet
timely payment of interest and repayment of principal. In the event of adverse
business, financial, or economic conditions, it is not likely to have the
capacity to pay interest and repay principal.

The CCC rating category is also used for debt subordinated to senior debt that
is assigned an actual or implied B or B- rating.

CC: The rating CC is typically applied to debt subordinated to senior debt which
is assigned an actual or implied CCC debt rating.

C: The rating C is typically applied to debt subordinated to senior debt which
is assigned an actual or implied CCC- debt rating. The C rating may be used to
cover a situation where a bankruptcy petition has been filed, but debt service
payments are continued.

C1: The Rating C1 is reserved for income bonds on which no interest is being
paid.


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<PAGE>   80


D: Debt rated D is in payment default. The D rating category is used when
interest payments or principal payments are not made on the date due even if the
applicable grace period has not expired, unless Standard & Poor's believes that
such payments will be made during such grace period. The D rating also will be
used upon the filing of a bankruptcy petition if debt service payments are
jeopardized.

PLUS (+) OR MINUS (-): The ratings from AA to CCC may be modified by the
addition of a plus or minus sign to show relative standing within the major
rating categories.

NR: Bonds may lack a S&P's rating because no public rating has been requested,
because there is insufficient information on which to base a rating, or because
S&P's does not rate a particular type of obligation as a matter of policy.

COMMERCIAL PAPER

A: S&P's commercial paper rating is a current assessment of the likelihood of
timely payment of debt considered short-term in the relevant market.

A-1: This highest category indicates that the degree of safety regarding timely
payment is strong. Those issues determined to possess extremely strong safety
characteristics are denoted with a plus (+) sign designation.

A-2: Capacity for timely payment on issues with this designation is
satisfactory. However, the relative degree of safety is not as high as for
issues designated "A-1 ".

A-3: Issues carrying this designation have adequate capacity for timely payment.
They are, however, more vulnerable to the adverse effects of changes in
circumstances than obligations carrying the higher designations.

FITCH INVESTORS SERVICE, INC.

INVESTMENT GRADE BOND RATINGS

AAA: Bonds considered to be investment grade and of the highest credit quality.
The obligor has an exceptionally strong ability to pay interest and repay
principal, which is unlikely to be affected by reasonably foreseeable events.

AA: Bonds considered to be investment grade and of very high credit quality. The
obligor's ability to pay interest and repay principal is very strong, although
not quite as strong as bonds rated "AAA". Because bonds rated in the "AAA" and
"AA" categories are not significantly vulnerable to foreseeable future
developments, short-term debt of these issuers is generally rated "F-1+".

A: Bonds considered to be investment grade and of high credit quality. The
obligors ability to pay interest and repay principal is considered to be strong,
but may be more vulnerable to adverse changes in economic conditions and
circumstances than bonds with higher ratings.


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<PAGE>   81


BBB: Bonds considered to be investment grade and of satisfactory credit quality.
The obligors ability to pay interest and repay principal is considered to be
adequate. Adverse changes in economic conditions and circumstances, however, are
more likely to have adverse impact on these bonds, and therefore, impair timely
payment. The likelihood that the ratings of these bonds will fall below
investment grade is higher than for bonds with higher ratings.

HIGH YIELD BOND RATINGS

BB: Bonds are considered speculative. The obligors ability to pay interest and
repay principal may be affected over time by adverse economic changes. However,
business and financial alternatives can be identified which could assist the
obligor in satisfying its debt service requirements.

B: Bonds are considered highly speculative. While bonds in this class are
currently meeting debt service requirements, the probability of continued timely
payment of principal and interest reflects the obligors limited margin of safety
and the need for reasonable business and economic activity throughout the life
of the issue.

CCC: Bonds have certain identifiable characteristics which, if not remedied, may
lead to default. The ability to meet obligations requires an advantageous
business and economic environment.

CC: Bonds are minimally protected. Default in payment of interest and/or
principal seems probable over time.

C: Bonds are in imminent default in payment of interest or principal.

DDD, DD, AND D: Bonds are in default of interest and/or principal payments. Such
bonds are extremely speculative and should be valued on the basis of their
ultimate recovery value in liquidation or reorganization of the obligor. "DDD"
represents the highest potential for recovery on these bonds, and "D" represents
the lowest potential for recovery.

PLUS (+) OR MINUS (-): The ratings from AA to C may be modified by the addition
of a plus or minus sign to indicate the relative position of a credit within the
rating category.

NR: Indicates that Fitch does not rate the specific issue.

CONDITIONAL: A conditional rating is premised on the successful completion of a
project or the occurrence of a specific event.

INVESTMENT GRADE SHORT-TERM RATINGS

Fitch's short-term ratings apply to debt obligations that are payable on demand
or have original maturities of generally up to three years, including commercial
paper, certificates of deposit, medium-term notes, and municipal and investment
notes.

F-1+: Exceptionally Strong Credit Quality. Issues assigned this rating are
regarded as having the strongest degree of assurance for timely payment.

                                       56


<PAGE>   82


F-1: Very Strong Credit Quality. Issues assigned this rating reflect an
assurance of timely payment only slightly less in degree than issues rated
"F-1+".

F-2: Good Credit Quality. Issues assigned this rating have a satisfactory degree
of assurance for timely payment, but the margin of safety is not as great as the
"F-1+" and "F-1 " categories.

F-3: Fair Credit Quality. Issues assigned this rating have characteristics
suggesting that the degree of assurance for timely payment is adequate, however,
near-term adverse changes could cause these securities to be rated below
investment grade.

DUFF & PHELPS

INVESTMENT GRADE BOND RATINGS

AAA: Highest credit quality. The risk factors are negligible, being only
slightly more than for risk-free U.S. Treasury debt.

AA+, AA, AND AA-: High credit quality. Protection factors are strong. Risk is
modest but may vary slightly from time to time because of economic conditions.

A+, A, AND A-: Protection factors are average but adequate. However, risk
factors are more variable and greater in periods of economic stress.

BBB+, BBB, AND BBB-: Below average protection factors but still considered
sufficient for prudent investment. Considerable variability in risk during
economic cycles.

HIGH YIELD BOND RATINGS

BB+, BB, AND BB-: Below investment grade but deemed likely to meet obligations
when due. Present or prospective financial protection factors fluctuate
according to industry conditions or company fortunes. Overall quality may move
up or down frequently within this category.

B+, B, AND B-: Below investment grade and possessing risk that obligations will
not be met when due. Financial protection factors will fluctuate widely
according to economic cycles, industry conditions and/or company fortunes.
Potential exists for frequent changes in the rating within this category or into
a higher or lower rating grade.

CCC: Well below investment grade securities. Considerable uncertainty exists as
to timely payment of principal interest or preferred dividends. Protection
factors are narrow and risk can be substantial with unfavorable
economic/industry conditions, and/or with unfavorable company developments.

Preferred stocks are rated on the same scale as bonds but the preferred rating
gives weight to its more junior



                                       57
<PAGE>   83


COMMERCIAL PAPER/CERTIFICATES OF DEPOSIT

CATEGORY 1: TOP GRADE

DUFF 1 PLUS: Highest certainty of timely payment. Short-term liquidity including
internal operating factors and/or ready access to alternative sources of funds,
is outstanding, and safety is just below risk-free U.S. Treasury short-term
obligations.

DUFF 1: Very high certainty of timely payment. Liquidity factors are excellent
and supported by good fundamental protection factors. Risk factors are minor.

DUFF 1 MINUS: High certainty of timely payment. Liquidity factors are strong and
supported by good fundamental protection factors. Risk factors are very small.

CATEGORY 2: GOOD GRADE

DUFF 2: Good certainty of timely payment. Liquidity factors and company
fundamentals are sound. Although ongoing funding needs may enlarge total
financing requirements, access to capital markets is good. Risk factors are
small.

CATEGORY 3: SATISFACTORY GRADE

DUFF 3: Satisfactory liquidity and other protection factors qualify issue as to
investment grade. Risk factors are larger and subject to more variation.
Nevertheless timely payment is expected.

No ratings are issued for companies whose paper is not deemed to be of
investment grade.

                                    * * * * *

NOTES:

1    The ratings indicated herein are believed to be the most recent ratings
     available at the date of this Statement of Additional Information for the
     securities listed. Ratings are generally given to securities at the time of
     issuance. While the rating agencies may from time to time revise such
     ratings, they undertake no obligation to do so, and the ratings indicated
     do not necessarily represent ratings which would be given to these
     securities on the date of the Fund's fiscal year end.

Bonds which are unrated expose the investor to risks with respect to capacity to
pay interest or repay principal which are similar to the risks of lower-rated
bonds. The Balanced Fund is dependent on the investment adviser's or investment
subadviser's judgment, analysis and experience in the evaluation of such bonds.

Investors should note that the assignment of a rating to a bond by a rating
service may not reflect the effect of recent developments on the issuer's
ability to make interest and principal payments.



                                       58

<PAGE>   84
                                     PART C

                                OTHER INFORMATION

<TABLE>
<CAPTION>

ITEM 23     EXHIBITS:
<S>         <C>

            a-1      Declaration of Trust. (Incorporated by reference to Exhibit 1(a) of Post-Effective
                     Amendment No .8 to Registrant's Registration Statement on Form N-1A)

            a-2      First Amended and Restated Establishment and Designation of Series of the Trust.
                     (Incorporated by reference to Exhibit 1(b) of Post-Effective Amendment No. 8 to
                     Registrant's Registration Statement on Form N-1A)

            a-3      Second Amended and Restated Establishment and Designation of Series of the Trust.
                     (Incorporated by reference to Exhibit 1(c) of Post-Effective No.8 to Registrant's
                     Registration Statement on Form N-1A)

            a-4      Third Amended and Restated Establishment and Designation of Series of the Trust.
                     (Incorporated by reference to Exhibit 1(d) of Post-Effective Amendment No. 8 to
                     Registrant's Registration Statement on Form N-1A)

            b.       By-Laws of the Trust. (Incorporated by reference to Exhibit 2 of Post Effective
                     Amendment No. 8 to Registrant's Registration Statement on Form N-1A)

            c.       None.

            d-1      Investment Advisory Agreement between Registrant and Green Century Capital Management,
                     Inc. (Incorporated by reference to Exhibit 5(a) of Post-Effective Amendment No. 8 to
                     Registrant's Registration Statement on Form N-1A)

            d-2      Investment Subadvisory Agreement with respect to the Green Century Balanced Fund
                     between Green Century Capital Management, Inc. and Adams, Harkness & Hill, Inc.
                     (Incorporated by reference to Exhibit d-2 of Post-Effective Amendment No. 12 to
                     Registrant's Registration Statement on Form N-1A)

            e-1      Distribution Agreement between the Registrant and Sunstone Distribution Services, LLC.
                     (Incorporated by reference to Exhibit

</TABLE>

<PAGE>   85

<TABLE>
<S>                  <C>
                     6(b) of Post-Effective Amendment No. 9 to Registrant's Registration Statement on Form N-1A)

            e-2      Revised and Restated Schedule A to the Distribution Agreement between the Registrant
                     and Sunstone Distribution Services, LLC effective August 1, 2000

            f.       None.

            g.       Custodian Agreement between Registrant and Investors Bank and Trust Company.
                     (Incorporated by reference to Exhibit 8(a) of Post-Effective Amendment No. 11 to
                     Registrant's Registration Statement on Form N-1A)

            h-1      Transfer Agent Agreement between Registrant and Unified Fund Services, Inc.
                     (Incorporated by reference to Exhibit 8(c) of Post-Effective Amendment No. 11 to
                     Registrant's Registration Statement on Form N-1A)

            h-2      Amended and Restated Administrative Services Agreement between Registrant and Green
                     Century Capital Management, Inc. (Incorporated by reference to Exhibit 9(a) of
                     Post-Effective Amendment No. 11 to Registrant's Registration Statement on Form N-1A)

            h-3      Sub-Administration  Agreement between Green Century Capital Management, Inc. and
                     Sunstone  Financial Group, Inc.  (Incorporated by reference to Exhibit 9(d) of
                     Post-Effective Amendment No. 9 to Registrant's Registration Statement on Form N-1A)

            h-4      Revised and Restated Schedule A to the Sub-Administration Agreement between Green
                     Century Capital Management, Inc. and Sunstone Financial Group, Inc. effective August
                     1, 2000

            i.       Opinion of Dana, Bingham & Gould, counsel for Registrant

            j.       Consent of Independent Accountants

            k.       None.

            l.       Investment representation letters of initial shareholder. (Incorporated by reference
                     to Exhibit 13 of Pre-Effective Amendment No. 3 to Registrant's Registration Statement
                     on Form N-1A)

            m.       Amended and Restated Distribution Plan pursuant to Rule 12b-1 under the Investment
                     Company Act of 1940 (the "1940 Act").

</TABLE>

<PAGE>   86

<TABLE>
<S>         <C>
                     (Incorporated  by  reference to Exhibit  15(b) of Post-Effective Amendment No. 9 to
                     Registrant's Registration Statement on Form N-1A)

            n.       None

            p-1      Code of Ethics for Green Century Capital Management

            p-2      Code of Ethics for Green Century Funds

            p-3      Code of Ethics for Domini Social Investments LLC and DSIL Investment Services LLC

            p-4      Code of Ethics for Domini Social Equity Fund, Domini Institutional Trust, Domini
                     Social Index Portfolio

            p-5      Code of Ethics for  Mellon Equity Associates

            q-1      Powers of Attorney with respect to the Domini Social Index Portfolio (Julia Elizabeth
                     Harris, Kirsten S. Moy, Frederick C. Williamson, Sr., Gregory A. Ratliff, William C.
                     Osborn, Karen Paul)

            q-2      Powers of Attorney with respect to The Green Century Funds (Douglas M. Husid, David J.
                     Fine, Steven Kadish, Stephen Morgan, C. William Ryan, James H. Starr, Wendy Wendlandt,
                     Douglas Phelps)

</TABLE>

ITEM 24.  PERSONS CONTROLLED BY OR UNDER COMMON CONTROL WITH THE TRUST.

                  Registrant neither controls any person nor is under common
control with any other person.


ITEM 25. INDEMNIFICATION.

                  Reference is made to Article V of the Trust's Declaration of
Trust, filed as Exhibit a-1 to this Registration Statement.

                  Insofar as indemnification for liability arising under the
Securities Act of 1933, as amended (the "1933 Act"), may be permitted to
Trustees, officers and controlling persons of the Trust pursuant to the Trust's
Declaration of Trust, or otherwise, the Trust has been advised that in the
opinion of the SEC such indemnification is against public policy as expressed in
the 1933 Act and is, therefore, unenforceable. In the event that a claim for
indemnification against such liabilities (other than the payment by the Trust of
expenses incurred or paid by a Trustee, officer or controlling person of the
Trust in the successful defense of any action, suit or proceeding) is asserted
by such Trustee, officer or controlling

<PAGE>   87

person in connection with the securities being registered, the Trust will,
unless in the opinion of its counsel the matter has been settled by controlling
precedent, submit to a court of appropriate jurisdiction the question whether
such indemnification by it is against public policy as expressed in the 1933 Act
and will be governed by the final adjudication of such issue.

ITEM 26. BUSINESS AND OTHER CONNECTIONS OF INVESTMENT ADVISER AND INVESTMENT
         SUBADVISER.

         Reference is made to the Form ADV (File No. 801-39630) of Green Century
Capital Management, Inc. last filed with the SEC on January 19, 1999, and the
Form ADV (File No. 801-15930) of Adams Harkness & Hill, Inc. last filed with SEC
on May 27, 1999. The information required by Item 26 hereof is included in
Schedule D of the respective Form ADV and such information is incorporated
herein by reference.

ITEM 27. PRINCIPAL UNDERWRITERS.

         (a) Sunstone Distribution Services, LLC currently serves as distributor
of the shares of: Choice Funds, The Haven Capital Management Trust, The Marsico
Investment Trust, Lend Lease Funds, RREEF Securities Trust , Zero Gravity Funds
and La Crosse Funds, Inc.

         (b) To the best of Registrant's knowledge, the executive officers of
Sunstone Distribution Services, LLC, distributor for Registrant, are as follows:

<TABLE>
<CAPTION>
NAME AND PRINCIPAL              POSITIONS AND OFFICES WITH SUNSTONE      POSITIONS AND OFFICES
BUSINESS ADDRESS                DISTRIBUTION SERVICES, LLC.              WITH REGISTRANT
------------------              -----------------------------------      ---------------------
<S>                             <C>                                      <C>


Miriam M. Allison               President                                None
803 West Michigan Street
Suite A
Milwaukee, WI 53233

Peter Hammond                   Vice President                           None
803 West Michigan Street
Suite A
Milwaukee, WI  53233

</TABLE>


ITEM 28. LOCATION OF ACCOUNTS AND RECORDS.

         All accounts, books or other documents required to be maintained by
Section 31(a) of the Investment Company Act of 1940 and the rules promulgated
thereunder are

<PAGE>   88

in the possession of the Registrant, at Registrant's business office, except (1)
records held and maintained by Investors Bank & Trust Company, 200 Clarendon
St., Boston, MA, 02116, relating to its function as custodian; (2) records held
and maintained by Sunstone Financial Group, Inc., 803 West Michigan Street,
Suite A, Milwaukee, Wisconsin, 53233, relating to its function as
subadministrator; (3) records held and maintained by Sunstone Distribution
Services, LLC, 803 West Michigan Street, Suite A, Milwaukee, Wisconsin 53233,
relating to its role as distributor; and (4) records held and maintained by
Unified Fund Services, Inc., 431 North Pennsylvania Street, Indianapolis,
Indiana 46204, relating to its function as transfer agent.


ITEM 29. MANAGEMENT SERVICES.

         All management-related service contracts entered into by Registrant are
discussed in Parts A and B of this Registration Statement.


ITEM 30. UNDERTAKINGS.

         (a)      The Registrant undertakes to comply with Section 16(c) of the
                  1940 Act as though such provisions of the 1940 Act were
                  applicable to the Registrant except that the request referred
                  to in the third full paragraph thereof may only be made by 10%
                  of the outstanding shares of the Registrant, regardless of the
                  net asset value or value of shares held by such requesting
                  shareholders.

         (b)      If the information called for by Item 5A of Form N-1A is
                  contained in the latest annual report to shareholders, the
                  Registrant shall furnish each person to whom a prospectus is
                  delivered with a copy of the Registrant's latest annual report
                  to shareholders upon request and without charge.
<PAGE>   89
                                   SIGNATURES

         Pursuant to the requirements of the Securities Act of 1933 (the "1933
Act") and the Investment Company Act of 1940, the Registrant certifies that it
meets all of the requirements for effectiveness of this Post-Effective Amendment
No. 15 to its Registration Statement under Rule 485(b) and has duly caused this
Amendment to its Registration Statement on Form N-1A to be signed on its behalf
by the undersigned, thereunto duly authorized, in the of City of Boston and the
Commonwealth of Massachusetts on the 22nd day of November, 2000.



                                     GREEN CENTURY FUNDS



                                     By:/s/Kristina A. Curtis
                                        ---------------------------------
                                        Treasurer



         Pursuant to the requirements of the 1933 Act, this Amendment to the
Registration Statement on Form N-1A has been signed below by the following
persons in the capacities indicated on November 22, 2000.


<TABLE>
<CAPTION>
Signature                          Title
---------                          -----
<S>                                <C>

/s/DOUGLAS M. HUSID*               President, Chief Executive Officer and Trustee
-------------------------
Douglas M. Husid


/s/ Kristina A. Curtis             Treasurer, Principal Financial Officer and
--------------------------         Principal Accounting Officer
Kristina A. Curtis


/s/DAVID J. FINE*                  Trustee
--------------------------
David J. Fine


/s/STEVEN KADISH*                  Trustee
--------------------------
Steven Kadish

</TABLE>

<PAGE>   90

<TABLE>
<CAPTION>
Signature                          Title
---------                          -----
<S>                                <C>

/s/STEPHEN MORGAN*                 Trustee
--------------------------
Stephen Morgan


/s/C. WILLIAM RYAN*                Trustee
--------------------------
C. William Ryan


/s/JAMES H. STARR*                 Trustee
--------------------------
James H. Starr


/s/WENDY WENDLANDT*                Trustee
--------------------------
Wendy Wendlandt


/s/DOUGLAS H. PHELPS*              Trustee
--------------------------
Douglas H. Phelps


*By:/s/Kristina A. Curtis
    ----------------------
Attorney-in-fact

</TABLE>


*Pursuant to Power of Attorney filed herewith.
<PAGE>   91
                                   SIGNATURES

         Domini Social Index Portfolio has duly caused this Post-Effective
Amendment Form N-1A (File No. 33-41692) of Green Century Funds (the "Trust") to
be signed on its behalf by the undersigned, thereto duly authorized, in the City
of Boston and the Commonwealth of Massachusetts on the 20th day of November,
2000.

                                            DOMINI SOCIAL INDEX PORTFOLIO


                                            By: /s/Amy Domini
                                                ------------------------------
                                                Amy L. Domini
                                                President


         This post-effective amendment to the Registration Statement on Form
N-1A of Green Century Funds has been signed below by the following persons in
the capacities indicated on November 20th, 2000.

<TABLE>
<CAPTION>

Signature                        Title
---------                        -----
<S>                              <C>

/s/ Amy L. Domini                President (Principal Executive Officer) of the Index
-------------------------        Portfolio
Amy L. Domini


/s/ Carol M. Laible              Treasurer (Principal Accounting and Financial Officer)
-------------------------        of Domini Social Index Portfolio
Carol M. Laible


Julia Elizabeth Harris*          Trustee of Domini Social Index Portfolio
-------------------------
Julia Elizabeth Harris


/s/Kirsten S. Moy*               Trustee of  Domini Social Index Portfolio
-------------------------
Kirsten S. Moy


/s/ William C. Osborn*           Trustee of Domini Social Index Portfolio
-------------------------
William C. Osborn

</TABLE>

<PAGE>   92

<TABLE>
<S>                               <C>
/s/ Karen Paul*                   Trustee of the Index Portfolio
-----------------------------
Karen Paul


/s/ Gregory A. Ratliff*           Trustee of Domini Social Index Portfolio
-----------------------------
Gregory A. Ratliff


/s/ Frederick C. Williamson*      Trustee of Domini Social Index Portfolio
-----------------------------
Frederick C. Williamson

*By: /s/ Amy Domini
     ------------------------
     Amy L. Domini

</TABLE>

*Pursuant to power of attorney filed herewith.


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