UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANY Investment Company Act file number: 811-07111 Morgan Stanley Insured California Municipal Securities (Exact name of registrant as specified in charter) 522 Fifth Avenue, New York, New York 10036 (Address of principal executive offices) (Zip code) Ronald E. Robison 522 Fifth Avenue, New York, New York 10036 (Name and address of agent for service) Registrant's telephone number, including area code: 212-296-6990 Date of fiscal year end: October 31, 2008 Date of reporting period: January 31, 2008 ITEM 1. SCHEDULE OF INVESTMENTS. The Trust's schedule of investments as of the close of the reporting period prepared pursuant to Rule 12-12 of Regulation S-X is as follows: MORGAN STANLEY INSURED CALIFORNIA MUNICIPAL SECURITIES PORTFOLIO OF INVESTMENTS JANUARY 31, 2008 (UNAUDITED) PRINCIPAL AMOUNT IN COUPON MATURITY THOUSANDS RATE DATE VALUE --------- ------ -------- ----------- TAX-EXEMPT MUNICIPAL BONDS (96.5%) CALIFORNIA (94.5%) $2,000 Anaheim Public Financing Authority, Distribution Electric Ser 2007-A (MBIA Insd) 4.50% 10/01/37 $ 1,903,960 1,000 Anaheim Public Financing Authority, Generation Refg Electric Ser 2002-B (FSA Insd) 5.25 10/01/18 1,088,850 2,000 California Department of Veterans Affairs, Home Purchase 2002 Ser A (AMBAC Insd) 5.35 12/01/27 2,067,900 1,500 California Department of Water Resources, Central Valley Ser Y (FGIC) 5.25 12/01/19 1,629,285 2,000 California Infrastructure & Economic Development Bank, Bay Area Toll Bridges Seismic Retrofit First Lien Ser 2003 A (FGIC Insd) (ETM) 5.00 07/01/29 2,221,580 1,000 California, Ser 2007 (MBIA) 4.25 08/01/33 916,160 1,000 California State University, Ser 2005 A (AMBAC Insd) 5.00 11/01/35 1,028,391 505 California, Various Purpose Dtd 03/01/94 (FSA Insd) 5.50 03/01/20 506,050 400 California Veterans Ser BH (AMT) (FSA Insd) 5.40 12/01/16 412,448 1,000 Capistrano Unified School District, Community Facilities District #98-2 Ladera Ser 2005 (FGIC Insd) 5.00 09/01/29 999,300 2,000 East Bay Municipal Utility District Water Ser 2001 (MBIA Insd) 5.00 06/01/26 2,167,700 3,025 Fairfield Calif Ctfs Partn-Zero Coupon 0.00 04/01/30 956,959 1,000 Golden State Tobacco Securitization Corporation, California, Enhanced Asset Backed Ser 2005 A (FGIC Insd) 5.00 06/01/38 991,440 1,280 Huntington Beach Union High School District Ser 2004 (FSA Insd) 5.00 08/01/26 1,349,709 1,110 Kern County Board of Education Refg 2006 Ser A COPs (MBIA Insd) 5.00 06/01/31 1,126,928 La Quinta Financing Authority, Local Agency 2004 Ser A (AMBAC Insd) 5.25 09/01/24 1,173,018 1,030 Los Angeles, Ser 2004 A (MBIA Insd) 5.00 09/01/24 1,083,519 1,000 Los Angeles County Metropolitan Transportation Authority Sales Tax Ser 2000 A (FGIC Insd) 4.50 07/01/29+ 996,560 1,000 Los Angeles Department of Water & Power, 2001 Ser A (FSA Insd) 5.25 07/01/21 1,057,850 800 Los Angeles Municipal Improvement Corporation, Police Headquarters Ser 2006 - A (FGIC Insd) 4.75 01/01/31 775,520 1,000 Los Angeles Wastewater Refg Ser 2003 B (FSA Insd) 5.00 06/01/22 1,061,360 1,000 Metropolitan Water District of Southern California, 2003 Ser B-2 (FGIC Insd) 5.00 10/01/27 1,036,600 1,000 Oxnard Financing Authority, Wastewater 2004 Ser A (FGIC Insd) 5.00 06/01/29 1,031,960 1,000 Rancho Mirage Redevelopment Agency, Ser 2003 A (MBIA Insd) 5.00 04/01/33 1,002,410 1,235 Rocklin California Uni School District Community 0.00 09/01/34 305,057 1,255 Rocklin California Uni School District Community 0.00 09/01/35 293,319 1,230 Rocklin California Uni School District Community 0.00 09/01/36 271,965 1,025 Rocklin California Uni School District Community 0.00 09/01/37 213,743 1,000 Sacramento County Sanitation Districts Financing Authority, Refg Ser 2006 (FGIC Insd) 5.00 12/01/28 1,040,360 180 Sacramento City Financing Authority, 1999 Solid Waste & Redevelopment (AMBAC Insd) 5.75 12/01/22 190,699 2,000 Sacramento City Financing Authority, Water & Capital Improvement 2001 Ser A (AMBAC Insd) 5.00 12/01/26+ 2,167,700 1,000 San Diego County Water Authority, California, Ser 2004 A COPs (FSA Insd) 5.00 05/01/29 1,027,770 1,000 San Francisco City & County, City Buildings Ser 2007 A COPs (FGIC Insd) 4.50 09/01/37 916,670 340 San Francisco City & County, Laguna Honda Hospital RITES PA 1387 (FSA Insd) 11.589# 06/15/30 390,585 2,000 San Francisco Public Utilities Commission, Water Refg Ser A 2001 (FSA Insd) 5.00 11/01/31 2,045,440 1,000 San Jose, Airport Ser 2001 A (FGIC Insd) 5.00 03/01/25 1,029,580 1,000 Simi Valley Public Financing Authority, Ser 2004 COPs (AMBAC Insd) 5.00 09/01/30 1,010,850 1,000 Southern California Public Power Authority, Transmission Refg Ser 2002 A (FSA Insd) 5.25 07/01/18 1,085,280 1,000 University of California, Ser 2007- J (FSA Insd) 4.50 05/15/31 992,090 1,000 University of California, Ser 2007- J (FSA Insd) 4.50 05/15/35 983,720 1,000 University of California Regents Ser 2007 A (MBIA Insd) 4.50 05/15/37 965,980 1,000 Upland School District, Election 2000 Ser 2001 B (FSA Insd) 5.125 08/01/25 1,069,920 675 Val Verde Unified School District of Construction COPs Ser 2005 B (FGIC Insd) 5.00 01/01/30 684,227 1,375 Washington Unified School District, 2004 Ser A (FGIC Insd) 5.00 08/01/22 1,452,013 1,000 Yucaipa Valley Water District, Ser 2004 A COPs (MBIA Insd) 5.25 09/01/24 1,047,800 ----------- 47,770,225 ----------- PUERTO RICO (2.0%) 1,000 Puerto Rico Infrastructure Financing Authority, 2000 Ser A (ETM)++ 5.50 10/01/32 1,061,540 ----------- TOTAL TAX-EXEMPT MUNICIPAL BONDS (Cost $47,277,296) 48,831,765 ----------- SHORT-TERM TAX-EXEMPT MUNICIPAL OBLIGATIONS (2.2%) 1,100 California Department of Water Ser B Sub Ser B-1 (Demand 02/01/08) (Cost $1,100,000) 3.53* 05/01/22 1,100,000 ----------- TOTAL INVESTMENTS (Cost $48,377,296) (a) (b) 98.70% 49,931,765 ======== OTHER ASSETS IN EXCESS OF LIABILITIES 1.3 664,844 -------- ----------- NET ASSETS APPLICABLE TO COMMON SHAREHOLDERS 100.0% $50,596,609 ======== =========== ---------- Note: The categories of investments are shown as a percentage of net assets applicable to common shareholders. AMT Alternative Minimum Tax. COPs Certificates of Participation. ETM Escrowed to Maturity. RITES Residual Interest Tax-Exempt Security (Illiquid security). + Prefunded to call date shown. ++ A portion of this security has been physically segregated in connection with open futures contracts in the amount of $180,095. * Current coupon rate of variable rate demand obligation. # Current coupon rate for residual interest bond. This rate resets periodically as the auction rate on the related security changes. Position in an inverse floating rate municipal obligation has a value of $390,585, which represents 0.8% of net assets applicable to common shareholders. (a) Securities have been designated as collateral in an amount equal to $42,707,117 in connection with open futures contracts. (b) The aggregate cost for federal income tax purposes approximates the aggregate cost for book purposes. Bond Insurance: AMBAC Ambac Assurance Corporation. FGIC Financial Guaranty Insurance Company. FSA Financial Security Assurance Inc. MBIA Municipal Bond Investors Assurance Corporation. XLCA XL Capital Assurance Inc. FUTURES CONTRACTS OPEN AT JANUARY 31, 2008: UNREALIZED NUMBER OF DESCRIPTION, DELIVERY UNDERLYING FACE APPRECIATION CONTRACTS LONG/SHORT MONTH AND YEAR AMOUNT AT VALUE (DEPRECIATION) --------- ---------- ---------------------------- --------------- -------------- 259 Long U.S. Treasury Swaps 10 Year, March 2008 $29,481,486 $ 879,153 30 Long U.S. Treasury Bonds 20 Year, March 2008 3,579,375 70,894 18 Short U.S. Treasury Notes 5 Year, March 2008 (2,034,000) (59,721) 53 Short U.S. Treasury Notes 2 Year, March 2008 (11,300,594) (174,929) 215 Short U.S. Treasury Notes 10 Year, March 2008 (25,094,531) (805,140) --------- Net Unrealized Depreciation (90,744) ========= ITEM 2. CONTROLS AND PROCEDURES. (a) The Trust's principal executive officer and principal financial officer have concluded that the Trust's disclosure controls and procedures are sufficient to ensure that information required to be disclosed by the Trust's in this Form N-Q was recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission's rules and forms, based upon such officers' evaluation of these controls and procedures as of a date within 90 days of the filing date of the report. (b) There were no changes in the Trust's internal control over financial reporting that occurred during the registrant's fiscal quarter that has materially affected, or is reasonably likely to materially affect, the Trust's internal control over financial reporting. ITEM 3. EXHIBITS. (a) A separate certification for each principal executive officer and principal financial officer of the registrant are attached hereto. 2 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. Morgan Stanley Insured California Municipal Securities /s/ Ronald E. Robison Ronald E. Robison Principal Executive Officer March 20, 2008 Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed by the following persons on behalf of the registrant and in the capacities and on the dates indicated. /s/ Ronald E. Robison Ronald E. Robison Principal Executive Officer March 20, 2008 /s/ Francis Smith Francis Smith Principal Financial Officer March 20, 2008 3