CDC NVEST FUNDS TRUST I
                            CDC NVEST FUNDS TRUST II
                            CDC NVEST FUNDS TRUST III
                         CDC NVEST CASH MANAGEMENT TRUST
                     CDC NVEST TAX EXEMPT MONEY MARKET TRUST
                           CDC NVEST COMPANIES TRUST I
                           AEW REAL ESTATE INCOME FUND
                              LOOMIS SAYLES FUNDS I
                             LOOMIS SAYLES FUNDS II

                               Dated August, 2003

          CODE OF ETHICS PURSUANT TO SECTION 406 OF THE SARBANES-OXLEY
            ACT OF 2002 FOR PRINCIPAL EXECUTIVE AND SENIOR FINANCIAL
                                    OFFICERS

I.   Covered Persons/Purpose of the Code

     This Code of Ethics (this "Code") pursuant to Section 406 of the
Sarbanes-Oxley Act of 2002 has been adopted by the registered investment
companies (each a "Fund" and, collectively, the "Funds") listed on Exhibit A and
applies to each Fund's Principal Executive Officer, Principal Financial Officer
and Principal Accounting Officer (the "Covered Persons," all covered persons are
set forth in Exhibit B) for the purpose of promoting:

     .    Honest and ethical conduct, including the ethical handling of actual
          or apparent conflicts of interest between personal and professional
          relationships;

     .    Full, fair, accurate, timely, and understandable disclosure in reports
          and documents that a registrant files with, or submits to, the
          Securities and Exchange Commission (the "SEC") and in other public
          communications made by the registrant

     .    Compliance with applicable governmental laws, rules and regulations;

     .    The prompt internal reporting of violations of the Code to an
          appropriate person or persons identified in the Code of violations of
          the Code; and

     .    Accountability for adherence to the Code.

     Each Covered Person should adhere to a high standard of business ethics and
should be sensitive to situations that may give rise to conflicts of interest.

II.  Covered Persons Should Handle Ethically Actual and Apparent Conflicts of
     Interest



     Overview. A "conflict of interest" occurs when a Covered Person's private
interest interferes with the interests of, or his service to, the Fund. For
example, a conflict of interest would arise if a Covered Person's, or a member
of the Covered Person's family or household, receives improper personal benefits
as a result of the Covered Person's position with the Fund.

     Certain conflicts of interest arise out of the relationships between
Covered Persons and the Fund and already are subject to conflict of interest
provisions in the Investment Company Act of 1940 (including the regulations
thereunder, the "1940 Act") and the Investment Advisers Act of 1940 (including
the regulations thereunder, the "Investment Advisers Act"). For example, Covered
Persons may not engage in certain transactions with the Fund because of their
status as "affiliated persons" of the Fund. The Funds and their investment
advisers; subadvisers; distributors and administrators (each a "Service
Provider" and, collectively, the "Service Providers") compliance programs and
procedures are designed to prevent, or identify and correct, violations of these
provisions. This Code does not, and is not intended to, repeat or replace these
programs and procedures, and such conflicts fall outside of the parameters of
this Code. See also Section V of this code.

     Although typically not presenting an opportunity for improper personal
benefit, conflicts may arise from, or as a result of, the contractual
relationship between the Funds and their Service Providers of which the Covered
Persons are also officers or employees. As a result, this Code recognizes that
the Covered Persons will, in the normal course of their duties (whether for the
Funds or for a Service Provider, or for each), be involved in establishing
policies and implementing decisions that will have different effects on the
Service Providers and the Funds. The participation of the Covered Persons in
such activities is inherent in the contractual relationships between the Funds
and their Service Providers and is consistent with the performance by the
Covered Persons of their duties as officers of the Funds. Thus, if performed in
conformity with the provisions of the 1940 Act and the Investment Advisers Act,
such activities will be deemed to have been handled ethically. In addition, it
is recognized by the Funds' Boards of Trustees ("Boards") that the Covered
Persons may also be officers or employees of one or more other investment
companies covered by this or other codes and that such service, by itself, does
not give rise to a conflict of interest.

     Other conflicts of interest are covered by the Code, even if such conflicts
of interest are not the subject of provisions of the 1940 Act and the Investment
Advisers Act. The following list provides examples of conflicts of interest
under the Code, but Covered Persons should keep in mind that these examples are
not exhaustive. The overarching principle is that the personal interest of a
Covered Person should not be placed improperly before the interest of a Fund.

     Each Covered Person must not:

     .    use his/her personal influence or personal relationships improperly to
          influence investment decisions or financial reporting by a Fund
          whereby the Covered Person would benefit personally to the detriment
          of the Fund;

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     .    cause a Fund to take action, or fail to take action, for the
          individual personal benefit of the Covered Person rather than the
          benefit the Fund; or

     .    retaliate against any other Covered Person or any employee of the
          Funds or their Service Providers for reports of potential violations
          that are made in good faith.

     There are some conflict of interest situations that should always be
approved by the Chief Legal Officer ("CLO") of the Fund (or, with respect to
activities of the CLO if he/she is a Covered Person, by the President ). These
conflict of interest situations are listed below:

     .    service on the board of directors or governing board of a publicly
          traded entity;

     .    acceptance of any investment opportunity, gift, gratuity or other
          thing of more than nominal value from any person or entity that does
          business, or desires to do business, with the Fund. This restriction
          shall not apply to (i) gifts from a single giver so long as their
          aggregate annual value does not exceed the equivalent of $100 or (ii)
          attending business meals, business related conferences, sporting
          events and other entertainment events at the expense of a giver, so
          long as the expense is reasonable;

     .    any ownership interest in, or any consulting relationship with, any
          entities doing business with a Fund, other than a Service Provider or
          an affiliate of a Service Provider. This restriction shall not apply
          to or otherwise limit the ownership of publicly traded securities so
          long as the Covered Person's ownership does not exceed more than 2% of
          the outstanding securities of the relevant class; and

     .    a direct or indirect financial interest in commissions, transaction
          charges or spreads paid by a Fund for effecting portfolio transactions
          or for selling or redeeming shares other than an interest arising from
          the Covered Person's employment with a Service Provider or its
          affiliate. This restriction shall not apply to or otherwise limit (i)
          the ownership of publicly traded securities so long as the Covered
          Person's ownership does not exceed more than 2% of the particular
          class of security outstanding or (ii) the receipt by the Service
          Provider of research or other benefits in exchange for "soft dollars".

III. Disclosure and Compliance

     .    Each Covered Person should familiarize himself with the disclosure
          requirements generally applicable to a Fund;

     .    Each Covered Person should not knowingly misrepresent, or cause others
          to misrepresent, facts about a Fund to others, whether within or
          outside the

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          Fund, including to the Fund's Board and auditors, and to governmental
          regulators and self-regulatory organizations;

     .    Each Covered Person should, to the extent appropriate within his/her
          area of responsibility, consult with other officers and employees of
          the Funds and the adviser with the goal of promoting full, fair,
          accurate, timely and understandable disclosure in the reports and
          documents the Funds file with, or submit to, the SEC and in other
          public communications made by the Funds; and

     .    It is the responsibility of each Covered Person to promote compliance
          with the standards and restrictions imposed by applicable laws, rules
          and regulations.

IV.  Reporting and Accountability

     Each Covered Person must:

     .    upon adoption of the Code (or thereafter as applicable, upon becoming
          a Covered Person), affirm in writing to the Funds that he/she has
          received, read, and understands the Code;

     .    annually thereafter affirm to the Funds that he/she has complied with
          the requirements of the Code; and

     .    notify the CLO of the Funds promptly if he/she knows of any violation
          of this Code (with respect to violations by the CLO if he/she is a
          Covered Person, the Covered Person shall report to the President).
          Failure to do so is itself a violation of this Code.

     The CLO of a Fund is responsible for applying this Code to specific
situations in which questions are presented under it and has the authority to
interpret this Code in any particular situation. However, any approvals or
waivers other than those this Code states can be granted by the CLO, sought by
the CLO or Covered Person will be considered by the relevant Fund's Audit
Committee (the "Committee").

     The Funds will follow these procedures in investigating and enforcing this
Code:

     .    the CLO will take all appropriate action to investigate any potential
          violations reported, which may include the use of internal or external
          counsel, accountants or other personnel;

     .    if, after such investigation, the CLO believes that no violation has
          occurred, the CLO is not required to take any further action;

     .    any matter that the CLO believes is a violation will be reported to
          the Committee;

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        .     if the Committee concurs that a violation has occurred, it will
              inform and make a recommendation to the Board, which will consider
              appropriate action, which may include review of, and appropriate
              modifications to, applicable policies and procedures; notification
              to appropriate personnel of the investment adviser or its board;
              or a recommendation to dismiss the Covered Person;

        .     the Committee will be authorized to grant waivers, as it deems
              appropriate; and

        .     any changes to or waivers of this Code will, to the extent
              required, be disclosed as provided by SEC rules.

V.      Other Policies and Procedures

        This Code shall be the sole code of ethics adopted by the Funds for
purposes of Section 406 of the Sarbanes-Oxley Act and the rules and forms
applicable to registered investment companies thereunder. Insofar as other
policies or procedures of the Funds or the Funds' Service Providers govern or
purport to govern the behavior or activities of the Covered Persons who are
subject to this Code, they are superseded by this Code to the extent that they
conflict with the provisions of this Code. The Funds and their Service
Providers' codes of ethics under Rule 17j-1 under the 1940 Act and the Service
Providers' more detailed compliance policies and procedures are separate
requirements applying to the Covered Persons and others, and are not part of
this Code.

VI.     Amendments

        Any amendments to this Code with respect to a Fund, other than
administrative amendments to Exhibits A and B, must be approved or ratified by a
majority vote of the Fund's Board, including a majority of independent trustees.

VII.    Confidentiality

        All reports and records prepared or maintained pursuant to this Code
will be considered confidential and shall be maintained and protected
accordingly. Except as otherwise required by law or this Code, such matters
shall not be disclosed to anyone except as permitted by the Board.

VIII.   Internal Use

        The Code is intended solely for the internal use by the Funds and does
not constitute an admission, by or on behalf of any Fund, as to any fact,
circumstance, or legal conclusion.

                                       -5-



Exhibit A

Registered Investment Companies

CDC Nvest Funds Trust I
CDC Nvest Funds Trust II
CDC Nvest Funds Trust III
CDC Nvest Cash Management Trust
CDC Nvest Tax Exempt Money Market Trust
CDC Nvest Companies Trust I
AEW Real Estate Income Fund
Loomis Sayles Funds I
Loomis Sayles Funds II

                                       -6-



Exhibit B

Persons Covered by this Code of Ethics



- -------------------------------------------------------------------------------------------------------------
       Trust          Principal Executive           Principal Financial          Principal Accounting
                            Officer                       Officer                       Officer
- -------------------------------------------------------------------------------------------------------------
                                                                         
CDC Nvest Funds       John. T. Hailer,              Nicholas H. Palmerino,       Nicholas H. Palmerino,
Trust I               Trustee, President and        Treasurer
                      Chief Treasurer
                      Executive Officer
- -------------------------------------------------------------------------------------------------------------
CDC Nvest Funds       John. T. Hailer,              Nicholas H. Palmerino,       Nicholas H. Palmerino,
Trust II              Trustee, President and        Treasurer                    Treasurer
                      Chief Executive Officer
- -------------------------------------------------------------------------------------------------------------
CDC Nvest Funds       John. T. Hailer,              Nicholas H. Palmerino,       Nicholas H. Palmerino,
Trust III             Trustee, President and        Treasurer                    Treasurer
                      Chief Executive Officer
- -------------------------------------------------------------------------------------------------------------
CDC Nvest Companies   John. T. Hailer,              Nicholas H. Palmerino,       Nicholas H. Palmerino,
Trust I               Trustee, President and        Treasurer                    Treasurer
                      Chief Executive Officer
- -------------------------------------------------------------------------------------------------------------
CDC Nvest Cash        John. T. Hailer,              Nicholas H. Palmerino,       Nicholas H. Palmerino,
Management Trust      Trustee, President and        Treasurer                    Treasurer
                      Chief Executive Officer
- -------------------------------------------------------------------------------------------------------------
CDC Nvest Tax         John. T. Hailer,              Nicholas H. Palmerino,       Nicholas H. Palmerino,
Exempt Money Market   Trustee, President and        Treasurer                    Treasurer
Trust                 Chief Executive Officer
- -------------------------------------------------------------------------------------------------------------
AEW Real Estate       John. T. Hailer,              Nicholas H. Palmerino,       Nicholas H. Palmerino,
Income Fund           Trustee, President and        Treasurer                    Treasurer
                      Chief Executive Officer
- -------------------------------------------------------------------------------------------------------------
Loomis Sayles Funds   Robert J. Blanding,           Nicholas H. Palmerino,       Nicholas H. Palmerino,
I and Loomis Sayles   Trustee, Chief Executive      Treasurer                    Treasurer
Funds II              Officer
- -------------------------------------------------------------------------------------------------------------


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