EX-99.CODE ETH

                                 CGM FOCUS FUND
                                CGM REALTY FUND
                                CGM MUTUAL FUND
                          CGM CAPITAL DEVELOPMENT FUND
                   (EACH A "FUND," COLLECTIVELY THE "FUNDS")

                  CODE OF ETHICS UNDER THE SARBANES-OXLEY ACT

I.       INTRODUCTION

The Board of Trustees of the Funds has established this Code of Ethics (the
"Code") in accordance with the Sarbanes-Oxley Act of 2002 and the rules
promulgated thereunder. This Code does not supersede or otherwise affect the
separate codes of ethics that the Funds and the investment adviser of the Funds
have adopted pursuant to Rule 17j-1 under the Investment Company Act of 1940,
as amended, and Rule 204A-1 under the Investment Advisers Act of 1940, as
amended.

This Code is designed to deter wrongdoing and promote:

         (i)   honest and ethical conduct, including the ethical handling of
               actual or apparent conflicts of interest between personal and
               professional relationships;

         (ii)  full, fair, accurate, timely, and understandable disclosure in
               reports and documents that the Funds file with, or submit to, the
               Securities and Exchange Commission ("SEC") and in other public
               communications made by the Funds;

         (iii) compliance with applicable governmental laws, rules, and
               regulations;

         (iv)  the prompt internal reporting of violations of the Code to an
               appropriate person or persons; and

         (v)   accountability for adherence to the Code.

The Code applies to the Funds' principal executive officer, principal financial
officer, principal accounting officer or controller, or persons performing
similar functions, regardless of whether these individuals are employed by the
Funds or a third party (collectively, "Covered Officers," each of whom is set
forth in Exhibit A). For the purposes of this Code, the Review Officer is David
Fietze.

II.      PRINCIPLES OF HONEST AND ETHICAL CONDUCT

         A.  General Objectives

The Funds expect their Covered Officers to adhere to the highest possible
standards of honest and ethical conduct. All Covered Officers are expected to
handle actual or apparent conflicts of interest between personal and
professional relationships in a manner that is above reproach, and to place the
interests of the Funds above their own personal interests.

         B.  Conflicts of Interest

All Covered Officers should be scrupulous in avoiding a conflict of interest
with regard to the Funds' interests. A conflict of interest occurs when an
individual's private interest interferes in any way -- or even appears to
interfere -- with the interests of a Fund. A conflict situation can arise when
a Covered Officer takes actions or has interests that may make it difficult to
perform his or her work for a Fund objectively and effectively. Conflicts of
interest also arise when a Covered Officer, or a member of his or her family,
receives improper benefits as a result of his or her position with the Funds,
whether such benefits are received from the Funds or a third party. ANY
CONFLICT OF INTEREST THAT ARISES IN A SPECIFIC SITUATION OR TRANSACTION MUST BE
DISCLOSED BY THE COVERED OFFICER TO THE REVIEW OFFICER AND RESOLVED BEFORE
TAKING ANY ACTION.

Conflicts of interest may not always be evident, and Covered Officers should
consult with the Review Officer or the Funds' legal counsel if they are
uncertain about any situation.

Examples of possible conflicts of interest include:

             1.  Outside Employment or Activities

Covered Officers may not engage in any outside employment or activity that
interferes with their performance or responsibilities to the Funds or is
otherwise in conflict with or prejudicial to the Funds. A Covered Officer must
disclose to the Review Officer any outside employment or activity that may
constitute a conflict of interest and obtain the Review Officer's approval
before engaging in any such employment or activity.

             2.  Gifts

Covered Officers may not accept gifts or other items of more than $250. value
annually from any person or entity that does business with or on behalf of the
Funds.

             3.  Other Situations

Because other conflicts of interest may arise, it would be impractical to
attempt to list all possible situations in this Code. If a proposed transaction
or situation raises any questions or doubts, a Covered Officer should consult
with the Review Officer or the Funds' counsel before engaging in the
transaction or activity.

         C.  Corporate Opportunities

Covered Officers may not exploit for their own personal gain, or for the
personal gain of their family members or relatives, opportunities that are
discovered through the use of Fund property, information, or position, unless
the opportunity is first disclosed fully in writing to the Board of Trustees
and the Board of Trustees declines to pursue such opportunity.

III.     FULL, FAIR, ACCURATE, TIMELY, AND UNDERSTANDABLE DISCLOSURE IN FUND
         DISCLOSURE AND REPORTING DOCUMENTS

As a registered investment company, it is of critical importance that each
Fund's public communications, reports, and SEC filings contain full, fair,
accurate, timely, and understandable disclosure. Accordingly, the Funds'
Covered Officers are expected to consider it central to their roles as officers
of the Funds to promote full, fair, accurate, timely, and understandable
disclosure in the Funds' public communications and reports, and in the
documents that the Funds file with, or submit to, the SEC.

Depending on his or her position with the Funds, a Covered Officer may be
called upon to provide necessary information to make the Funds' public reports,
communications, and SEC filings and submissions complete, fair, and
understandable. The Funds expect their Covered Officers to take this
responsibility very seriously and to provide prompt and accurate answers to
inquiries related to the Funds' public disclosure requirements. Covered
Officers may be asked to certify the accuracy of all responses and information
provided for inclusion in the Funds' public reports, communications, and SEC
filings and submissions.

IV.      COMPLIANCE WITH APPLICABLE GOVERNMENTAL RULES AND REGULATIONS

As a registered investment company, each Fund is subject to regulation by the
SEC and must comply with Federal securities laws and regulations, as well as
other applicable laws. The Funds insist on strict compliance with the spirit
and the letter of these laws and regulations. Each Covered Officer shall
cooperate with the Funds' counsel, the Funds' independent accountants, and the
Funds' other service providers with the goal of maintaining the Funds' material
compliance with applicable governmental rules and regulations.

The Funds expect their Covered Officers to comply with all laws, rules, and
regulations applicable to the Funds' operations and business. Covered Officers
should seek guidance whenever they are in doubt as to the applicability of any
law, rule, or regulation, or regarding any contemplated course of action.
Covered Officers should also make use of the various guidelines which the Funds
and their service providers have prepared on specific laws and regulations. IF
IN DOUBT ON A COURSE OF ACTION, A GOOD GUIDELINE IS "ALWAYS ASK FIRST, ACT
LATER" -- IF YOU ARE UNSURE OF WHAT TO DO IN ANY SITUATION, SEEK GUIDANCE
BEFORE YOU ACT.

Upon obtaining knowledge of any material violation of any applicable law, rule,
or regulation by a Fund or a person acting with or on behalf of a Fund, a
Covered Officer shall report such violation to the Review Officer, the Funds'
counsel, or both. (See Section VI of the Code for a discussion of reporting
Code violations.) Each Covered Officer shall cooperate or take such steps as
may be necessary or appropriate to remedy any such material violation.

V.       CONFIDENTIALITY

The Funds' Covered Officers must maintain the confidentiality of information
entrusted to them by the Funds, except when disclosure is authorized by the
Funds' counsel or required by laws or regulations. Whenever possible, Covered
Officers should consult with the Funds' counsel if they believe they have a
legal obligation to disclose confidential information. Confidential information
includes all non-public information that might be of use to competitors or
harmful to the Funds or their shareholders if disclosed. The obligation to
preserve confidential information continues even after employment as a Covered
Officer ends.

VI.      PROMPT INTERNAL REPORTING OF VIOLATIONS OF THE CODE; EVALUATION OF
         POSSIBLE VIOLATIONS; DETERMINATION OF SANCTIONS

         A.  Reporting to Review Officer. The Funds' Covered Officers shall
promptly report knowledge of, or information concerning, any material violation
of this Code to the Review Officer. Any such report shall be in writing, and
shall describe in reasonable detail the conduct that such Covered Officer
believes to have violated this Code. The Review Officer shall also have the
authority to draft a report of a suspected material violation of the Code, if
no written report is made by a Covered Officer.

         B.  Evaluation of Reports. The Review Officer shall then consult with
the Funds' counsel to the extent necessary to determine whether the reported
conduct actually violates the Code. If it is determined that there has been a
violation of the Code, the Review Officer will determine (in consultation with
the Funds' counsel) whether the violation has had or may have, in the
reasonable judgment of the Review Officer, a material adverse impact upon a
Fund.

             1. No Material Adverse Impact on a Fund. If the Review Officer
determines that the violation has not caused a material adverse impact upon a
Fund, the Review Officer shall determine what sanctions, if any, may be
appropriate for the violation. (See Section VIII of the Code for a discussion
of possible sanctions.)

             2. Material Adverse Impact on a Fund. If the Review Officer
determines that the violation has caused a material adverse impact upon a Fund,
the Review Officer shall promptly notify the Board of such violation. The Board
shall be entitled to consult with independent legal counsel to determine
whether the violation actually has had a material adverse impact upon a Fund;
to formulate sanctions, if any, appropriate for the violation; or for any other
purpose that the Board, in its business judgment, determines to be necessary or
advisable. (See Section VIII of the Code for a discussion of possible
sanctions.)

         C.  Periodic Reports by Review Officer to Board of Trustees. The Review
Officer shall report to the Board at each regularly scheduled Board meeting all
violations of this Code with respect to the Funds (whether or not they caused a
material adverse impact upon a Fund) and all sanctions imposed.

VII.     WAIVERS OF PROVISIONS OF THE CODE

         A.   Waivers. A Covered Officer may request a waiver of a provision of
              this Code if there is a reasonable likelihood that a contemplated
              action would be a material departure from a provision of the
              Code. Waivers will not be granted except under extraordinary or
              special circumstances.

              The process of requesting a waiver shall consist of the following
              steps:

                   a.    The Covered Officer shall set forth a request for
                         waiver in writing and submit such request to the
                         Review Officer. The request shall describe the
                         conduct, activity, or transaction for which the
                         Covered Officer seeks a waiver, and shall briefly
                         explain the reason for engaging in the conduct,
                         activity, or transaction.

                   b.    The determination with respect to the waiver shall be
                         made in a timely fashion by the Review Officer, in
                         consultation with Funds' counsel, and submitted to the
                         Board for ratification.

                   c.    The decision with respect to the waiver request shall
                         be documented and kept in the Funds' records for the
                         appropriate period mandated by applicable law or
                         regulation.

         B.   Disclosure of Waivers. To the extent required by applicable law,
              waivers (including "implicit waivers") shall be publicly
              disclosed on a timely basis. An "implicit waiver" is defined as
              the Funds' failure to take action within a reasonable period of
              time regarding a material departure from a provision of the Code
              that has been made known to an "executive officer" of the Funds.
              For this purpose, an "executive officer" is the Funds' President
              or Chief Executive Officer, Vice President (who is in charge of a
              principal policymaking function), or any other person who
              performs similar policymaking functions for the Funds. For the
              purpose of determining whether an "implicit waiver" has occurred,
              if a material departure from a provision of the Code is known
              only by the Covered Officer who has caused the material
              departure, the material departure will not be considered to have
              been made known to an executive officer of the Funds.

VIII.    ACCOUNTABILITY FOR ADHERENCE TO THE CODE

The matters covered in this Code are of the utmost importance to the Funds and
their shareholders, and are essential to the Funds' ability to conduct their
business in accordance with their stated values. The Funds' Covered Officers
are expected to adhere to these rules in carrying out their duties for the
Funds.

The Funds will, if appropriate, take action against any of their Covered
Officers whose actions are found to violate this Code. Sanctions for violations
of the Code may include, among other things, a requirement that the violator
undergo training related to the violation, a letter of sanction, the imposition
of a monetary penalty, and/or suspension or termination of the employment of
the violator. Where a Fund has suffered a loss because of violations of this
Code or applicable laws, regulations, or rules, it may pursue its remedies
against the individuals or entities responsible.

IX.      RECORDKEEPING

A. General. Each Fund requires accurate recording and reporting of information
in order to make responsible business decisions. Each Fund's books, records,
accounts and financial statements must be maintained in reasonable detail, must
appropriately reflect the Fund's transactions, and must conform both to
applicable legal requirements and to the Fund's system of internal controls.

B. Code of Ethics Records. A copy of this Code, any amendments hereto, and any
reports or other records created in relation to waivers of or amendments to
provisions of this Code shall be kept as records of the Funds for six years
from the end of the fiscal year in which such document was created. Such
records shall be furnished to the SEC or its staff upon request.

X.       AMENDMENTS TO THE CODE

The Covered Officers and the Review Officer are encouraged to recommend
improvements to this Code to the Board of Trustees. The Funds' Board may amend
the Code in its discretion with respect to the Funds. In connection with any
amendment to the Code, the Review Officer shall prepare a brief description of
the amendment, in order that this description may be disclosed in accordance
with applicable law and regulations. Any amendment requires the approval of a
majority of the independent members of the Board as well as a majority of the
overall Board.



DATED: October 27, 2005.


EXHIBIT A

                                COVERED OFFICERS


Principal Executive Officer                      Robert L. Kemp (President)
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Principal Financial Officer                      Jem Hudgins (Treasurer)
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