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FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
1. Name and Address of Reporting Person*
Bogart Thomas A

(Last)(First)(Middle)
500 BOYLSTON STREET

(Street)
BOSTONMA02116

(City)(State)(Zip)
2. Issuer Name and Ticker or Trading Symbol
MFS CALIFORNIA INSURED MUNICIPAL FUND [CCA]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
Officer (give title below)XOther (specify below)
Director of the Advisor
3. Date of Earliest Transaction (Month/Day/Year)
12/02/2008
4. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)
7. Nature of Indirect Beneficial Ownership
(Instr. 4)
CodeVAmount(A) or (D)Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)
6. Date Exercisable and Expiration Date
(Month/Day/Year)
7. Title and Amount of Underlying Securities
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)
10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)
11. Nature of Indirect Beneficial Ownership
(Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
Susan S. Newton, By Power of Attorney06/01/2009
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

                                POWER OF ATTORNEY



The  undersigned  on his or her own behalf  and on behalf of his or her  estate,
heirs and assigns hereby  constitutes and appoints Susan S. Newton,  Christopher
R. Bohane,  Timothy M. Fagan,  Susan A. Pereira and Brian E. Langenfeld and each
of them singly as true and lawful  attorneys with full power to them and each of
them, to execute,  on behalf of the  undersigned,  in the capacity listed below,
any and all  statements or reports under Section 16 of the  Securities  Exchange
Act of 1934, as amended,  with respect to the beneficial ownership of reportable
securities  issued by MFS  California  Insured  Municipal  Fund, MFS High Income
Municipal  Trust, MFS InterMarket  Income Trust I, MFS Intermediate  High Income
Fund, MFS Investment  Grade  Municipal  Trust and MFS High Yield Municipal Trust
including, without limitation, all initial statements of beneficial ownership on
Form 3, all  statements  of changes of  beneficial  ownership  on Form 4 and all
annual  statements  of  beneficial  ownership  on Form 5, and any and all  other
documents  that  may be  required,  from  time to  time,  to be  filed  with the
Securities  and  Exchange  Commission,  to  execute  any and all  amendments  or
supplements  to any such  statements  or forms,  and to file the same,  with all
exhibits  thereto,  and  other  documents  in  connection  therewith,  with  the
Securities and Exchange  Commission,  granting to said attorney,  full power and
authority  to do so and  perform  each and  every act and  thing  requisite  and
necessary  to be done in and about the  premises,  as fully to all  intents  and
purposes as the undersigned  (or his or her estate,  heirs and assigns) might or
could do in person,  hereby  ratifying and confirming all that said attorneys or
any of them may lawfully do or cause to be done by virtue hereof.

IN WITNESS WHEREOF,  the undersigned has set his or her hand on this 15th day of
June, 2007.



THOMAS A. BOGART
Thomas A. Bogart

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