MERRILL LYNCH CALIFORNIA INSURED MUNICIPAL BOND FUND OF MERR
N-30D, 1997-10-16
Previous: CYCLO3PSS CORP, 10QSB, 1997-10-16
Next: MOLTEN METAL TECHNOLOGY INC /DE/, PRES14A, 1997-10-16



MERRILL LYNCH 
CALIFORNIA 
INSURED
MUNICIPAL 
BOND FUND



[FUND LOGO]
STRATEGIC
         Performance



Annual Report
August 31, 1997



This report is not authorized for use as an offer of sale or a 
solicitation of an offer to buy shares of the Fund unless accompanied or 
preceded by the Fund's current prospectus. Past performance results 
shown in this report should not be considered a representation of future 
performance. Investment return and principal value of shares will 
fluctuate so that shares, when redeemed, may be worth more or less than 
their original cost. Statements and other information herein are as 
dated and are subject to change.



Merrill Lynch
California Insured
Municipal Bond Fund
Merrill Lynch California
Municipal Series Trust
Box 9011
Princeton, NJ
08543-9011                                              #16575 -- 8/97



[RECYCLE LOGO]
Printed on post-consumer recycled paper



Merrill Lynch California Insured Municipal Bond Fund   August 31, 1997

TO OUR SHAREHOLDERS

The Municipal Market Environment
During the six months ended August 31, 1997, a number of very favorable 
factors combined to push both tax-exempt and taxable bond yields lower. 
A slowing domestic economy, a continued benign, if not improving, 
inflationary environment, a declining Federal budget deficit with 
resultant reduced Treasury borrowing needs, and a successful 
Congressional budget accord all resulted in significant declines in 
fixed-income yields. By the end of July, 30-year US Treasury bond yields 
had declined approximately 50 basis points (0.50%) to 6.30%, their 
lowest level in over a year. Similarly, as measured by the Bond Buyer 
Revenue Bond Index, long-term municipal revenue bond yields fell over 50 
basis points to 5.49%, their lowest level since early 1994.

However, during August the fixed-income markets retraced a part of their 
earlier gains. Investors and traders developed new fears that domestic 
economic growth would reaccelerate during the remainder of the calendar 
year and cause the Federal Reserve Board to raise interest rates prior 
to 1998. During August, long-term US Treasury bond yields increased by 
approximately 30 basis points to end the period at 6.61%. Long-term, 
tax-exempt revenue bond yields rose by approximately 20 basis points to 
end the August 31, 1997 period at 5.60%. Over the last six months, the 
overall positive combination of moderate economic growth and minimal 
inflation fostered a decline in long-term US Treasury bond yields of 
approximately 20 basis points, while long-term municipal bond yields 
fell approximately 25 basis points.

The decline in tax-exempt yields in recent months was even more 
impressive given that the municipal market lost much of the technical 
support it enjoyed for over a year. In previous quarters, new tax-exempt 
bond issuance declined, or remained stable. During the six months ended 
August 31, 1997, approximately $100 billion in new long-term municipal 
securities was underwritten, an increase of over 12% versus the 
comparable period in 1996. As tax-exempt bond yields declined, many 
municipal bond issuers took this opportunity to both issue new debt as 
well as refinance older, higher-couponed debt with new, lower-yielding 
issues. This refinancing led to a surge in tax-exempt issuance in recent 
months. Over the three months ended August 31, 1997, new long-term, tax-
exempt bond issuance totaled approximately $55 billion, an increase of 
over 25% versus the August 31, 1996 quarter.

The decline in municipal bond yields also resulted in some reduction in 
retail investor demand. In earlier episodes of rapidly declining 
interest rates, individual investor demand initially fell until 
investors became more acclimated to the lower interest rate levels. 
Should interest rates stabilize, we expect investor demand to increase 
once again. Also, this past June and July, municipal bond investors 
received over $50 billion in assets from coupon income payments, bond 
maturities, and the proceeds from early bond redemptions. Despite the 
continued attraction of the US equity market, much of these assets 
should be reallocated to the municipal bond market as investors adjust 
to the new investment environment.

Looking ahead, given the extent of the recent bond market rally, some 
retrenchment or at least a period of consolidation is likely. However, 
the positive backdrop of modest economic growth and low inflation 
suggests that any such adjustment is not likely to be excessive. Despite 
recent increases in new bond issuance, supply for all of 1997 is not 
expected to be materially different than earlier estimates of 
approximately $175 billion. It is likely that the recent increase in 
issuance is largely borrowed from financings that originally were 
scheduled for later this year. Additionally, any significant increase in 
tax-exempt bond yields will preclude any further bond refinancings, 
reducing future supply. Unless the current positive economic 
fundamentals undergo immediate and meaningful deterioration, we are 
likely to view any increase in municipal bond yields as an opportunity 
to purchase more attractively priced tax-exempt securities.

Fiscal Year in Review 
As 1997 began, Treasury bond yields rose in excess of 7% as an improving 
economy caused inflationary concerns to mount. We identified this level 
as the lower price end of the trading range and began buying long-term 
municipal bonds.

One interesting note during the fiscal year was that municipal bonds 
outperformed Treasury issues. This was most likely caused by a decreased 
amount of issuance in a year where many municipal bonds were redeemed, 
or called from the marketplace. 

A rally into the six months ended August 31, 1997 brought municipal 
interest rates back down to levels where they historically lose retail 
support. In our experience, professional traders and arbitrageurs 
normally account for most trading activity at these prices. When this 
occurred, we reduced the Fund's exposure to the long-term end of the 
market, protecting net asset valuation. We presently expect to maintain 
this position until the Federal Reserve Board completes its tightening 
phase and a more sustained drop in yields can be forecast. During the 
fiscal year, our strategy benefited the Fund's total return, enabling 
Class A Shares to achieve an above California insured municipal bond 
fund industry average of 8.84%. (Results shown do not reflect sales 
charges and would be lower if sales charges were included. Complete 
performance information, including average annual total returns, can be 
found on pages 3 -- 6 of this report to shareholders.)

Portfolio Strategy
During the past several months, the municipal market was characterized 
by enormous volatility within an abnormally tight trading range. Lack of 
significant primary supply, combined with an equally disinterested 
demand side at low interest rates created a stagnant marketplace where a 
low volume of activity fostered inefficient price movements. During the 
six months ended August 31, 1997, our portfolio strategy was aimed at 
identifying and capturing the relevant municipal bond trading range that 
corresponds to Treasury bond yields ranging from 7% to 6.50%. When 
Treasury yields are at these levels, municipal bonds tend to have a 
corresponding range of 5.50% -- 5.90%. We presently aim to buy municipal 
bonds when yields approach the 5.90% level and sell when they reach the 
latter level. During the August period, this formula worked well on 
several occasions. We remain focused on achieving as high a level of 
income as possible. To this end, we seek to invest in higher-yielding 
California bonds that comply with the Fund's credit constraints. We are 
currently neutral on the prospects for the fixed-income market, with a 
bias toward becoming more aggressively postured as interest rates move 
higher in anticipation of another possible Federal Funds rate increase 
this fall. Should this event provide us with a buying opportunity, we 
would expect to reenter the insured California bond market by extending 
the Fund's duration, since the municipal bond market's prospects appear 
very favorable for 1998. 

In Conclusion
We appreciate your investment in Merrill Lynch California Insured 
Municipal Bond Fund, and we look forward to assisting you with your 
financial needs in the months and years ahead.

Sincerely,

/S/ARTHUR ZEIKEL
Arthur Zeikel
President

/S/VINCENT R. GIORDANO
Vincent R. Giordano
Senior Vice President 

/S/WALTER C. O'CONNOR
Walter C. O'Connor
Vice President and Portfolio Manager

October 2, 1997



PERFORMANCE DATA

About Fund Performance

Investors are able to purchase shares of the Fund through the Merrill 
Lynch Select PricingSM System, which offers four pricing alternatives:

[bullet] Class A Shares incur a maximum initial sales charge (front-end 
load) of 4% and bear no ongoing distribution or account maintenance 
fees. Class A Shares are available only to eligible investors.

[bullet] Class B Shares are subject to a maximum contingent deferred 
sales charge of 4% if redeemed during the first year, decreasing 1% each 
year thereafter to 0% after the fourth year. In addition, Class B Shares 
are subject to a distribution fee of 0.25% and an account maintenance 
fee of 0.25%. These shares automatically convert to Class D Shares after 
approximately 10 years. (There is no initial sales charge for automatic 
share conversions.)

[bullet] Class C Shares are subject to a distribution fee of 0.35% and 
an account maintenance fee of 0.25%. In addition, Class C Shares are 
subject to a 1% contingent deferred sales charge if redeemed within one 
year of purchase.

[bullet] Class D Shares incur a maximum initial sales charge of 4% and 
an account maintenance fee of 0.10% (but no distribution fee).

None of the past results shown should be considered a representation of 
future performance. Figures shown in the "Average Annual Total Return" 
tables as well as the total returns and cumulative total returns in the 
"Performance Summary" tables assume reinvestment of all dividends and 
capital gains distributions at net asset value on the payable date. 
Investment return and principal value of shares will fluctuate so that 
shares, when redeemed, may be worth more or less than their original 
cost. Dividends paid to each class of shares will vary because of the 
different levels of account maintenance, distribution and transfer 
agency fees applicable to each class, which are deducted from the income 
available to be paid to shareholders.




<TABLE>
<CAPTION>

Recent Performance Results

                                                                                              12 Month         3 Month
                                             8/31/97         5/31/97         8/31/96          % Change        % Change
<S>                                         <C>             <C>              <C>              <C>              <C>
Class A Shares*                              $10.25          $10.04           $9.84            +4.17%           +2.09%
Class B Shares*                               10.25           10.04            9.84            +4.17            +2.09
Class C Shares*                               10.24           10.03            9.84            +4.07            +2.09
Class D Shares*                               10.26           10.04            9.85            +4.16            +2.19
Class A Shares -- Total Return*                                                                +9.50(1)         +3.35(2)
Class B Shares -- Total Return*                                                                +8.95(3)         +3.22(4)
Class C Shares -- Total Return*                                                                +8.74(5)         +3.19(6)
Class D Shares -- Total Return*                                                                +9.39(7)         +3.42(8)
Class A Shares -- Standardized 30-day Yield    3.98%
Class B Shares -- Standardized 30-day Yield    3.64%
Class C Shares -- Standardized 30-day Yield    3.54%
Class D Shares -- Standardized 30-day Yield    3.89%

*   Investment results shown do not reflect sales charges; results shown would be lower if a sales charge was included.
(1) Percent change includes reinvestment of $0.504 per share ordinary income dividends.
(2) Percent change includes reinvestment of $0.123 per share ordinary income dividends.
(3) Percent change includes reinvestment of $0.453 per share ordinary income dividends.
(4) Percent change includes reinvestment of $0.110 per share ordinary income dividends.
(5) Percent change includes reinvestment of $0.443 per share ordinary income dividends.
(6) Percent change includes reinvestment of $0.108 per share ordinary income dividends.
(7) Percent change includes reinvestment of $0.494 per share ordinary income dividends.
(8) Percent change includes reinvestment of $0.121 per share ordinary income dividends.

</TABLE>



[GRAPHIC LINE CHART OMITTED: TOTAL RETURN BASED ON A $10,000 INVESTMENT]

Total Return Based on a $10,000 Investment--Class A Shares and Class B 
Shares

A line graph depicting the growth of an investment in the Fund's Class A 
Shares and Class B Shares compared to growth of an investment in the 
Lehman Brothers Municipal Bond Index. Beginning and ending values are:

                                            2/26/93**          8/97

ML California Insured Municipal Bond +
Fund -- Class A Shares*                      $9,600          $12,477

ML California Insured Municipal Bond +
Fund -- Class B Shares*                     $10,000          $12,704

Lehman Brothers Municipal Bond Index++      $10,000          $13,091


Total Return Based on a $10,000 Investment--Class C Shares and Class D 
Shares

A line graph depicting the growth of an investment in the Fund's Class C 
Shares and Class D Shares compared to growth of an investment in the 
Lehman Brothers Municipal Bond Index.  Beginning and ending values are:

                                           10/21/94**          8/97

ML California Insured Municipal Bond +
Fund -- Class C Shares*                     $10,000          $12,714

ML California Insured Municipal Bond +
Fund -- Class D Shares*                      $9,600          $12,410

Lehman Brothers Municipal Bond Index++      $10,000          $12,932

*  Assuming maximum sales charge, transaction costs and other operating
   expenses, including advisory fees.
** Commencement of Operations.
 + ML California Insured Municipal Bond Fund invests primarily in long-
   term investment-grade obligations issued by or on behalf of the State
   of California, its political subdivisions, agencies and
   instrumentalities and obligations of other qualifying issuers.
++ This unmanaged Index consists of long-term revenue bonds,
   prerefunded bonds, general obligation bonds and insured bonds.
   Past performance is not predictive of future performance.



Average Annual Total Return

                            % Return Without       % Return With
                              Sales Charge         Sales Charge**
Class A Shares*
Year Ended 6/30/97                +9.50%               +5.12%
Inception (2/26/93)
through 6/30/97                   +5.76                +4.77

 * Maximum sales charge is 4%.
** Assuming maximum sales charge.


                                % Return              % Return
                              Without CDSC           With CDSC**
Class B Shares*
Year Ended 6/30/97                +8.95%               +4.95%
Inception (2/26/93) 
through 6/30/97                   +5.23                +5.23

 * Maximum contingent deferred sales charge is 4% and is reduced 
   to 0% after 4 years.
** Assuming payment of applicable contingent deferred sales charge.


                                % Return              % Return
                              Without CDSC           With CDSC**
Class C Shares*
Year Ended 6/30/97                +8.96%               +7.96%
Inception (10/21/94)
through 6/30/97                   +8.64                +8.64

 * Maximum contingent deferred sales charge is 1% and is reduced 
   to 0% after 1 year.
** Assuming payment of applicable contingent deferred sales charge.


                           % Return Without        % Return With
                             Sales Charge          Sales Charge**
Class D Shares*
Year Ended 6/30/97                +9.50%               +5.12%
Inception (10/21/94) 
through 6/30/97                   +9.24                +7.60

 * Maximum sales charge is 4%.
** Assuming maximum sales charge.



<TABLE>
<CAPTION>


Performance Summary -- Class A Shares

                                    Net Asset Value              Capital Gains
Period Covered                 Beginning         Ending           Distributed           Dividends Paid*          % Change**
<S>                            <C>              <C>                 <C>                    <C>                  <C>
2/26/93 -- 12/31/93             $10.00           $10.25               --                    $0.450                + 7.18%
1994                             10.25             8.97               --                     0.518                - 7.54
1995                              8.97            10.10               --                     0.514                +18.73
1996                             10.10            10.09               --                     0.510                + 5.17
1/1/97-- 8/31/97                 10.09            10.25               --                     0.327                + 5.02
                                                                                      Total $2.319
                                                                         Cumulative total return as of 8/31/97:  + 29.97%**

*  Figures may include short-term capital gains distributions.
** Figures do not include sales charge; results would be lower if sales charge was included.

</TABLE>



<TABLE>
<CAPTION>


Performance Summary -- Class B Shares

                                    Net Asset Value              Capital Gains
Period Covered                 Beginning         Ending           Distributed           Dividends Paid*          % Change**
<S>                            <C>              <C>                 <C>                    <C>                  <C>
2/26/93 -- 12/31/93             $10.00           $10.26               --                    $0.407               + 6.83%
1994                             10.26             8.98               --                     0.471               - 7.99
1995                              8.98            10.11               --                     0.465               +18.12
1996                             10.11            10.10               --                     0.460               + 4.64
1/1/97-- 8/31/97                 10.10            10.25               --                     0.294               + 4.57
                                                                                      Total $2.097
                                                                         Cumulative total return as of 8/31/97:  +27.04%**

*  Figures may include short-term capital gains distributions.
** Figures do not reflect deduction of any sales charge; results would be lower if sales charge was deducted.

</TABLE>



<TABLE>
<CAPTION>


Performance Summary -- Class C Shares

                                    Net Asset Value              Capital Gains
Period Covered                 Beginning         Ending           Distributed           Dividends Paid*          % Change**
<S>                            <C>              <C>                 <C>                    <C>                  <C>
10/21/94 -- 12/31/94            $9.19            $8.97                --                    $0.091               - 1.38%
1995                             8.97            10.09                --                     0.455               +17.90
1996                            10.09            10.09                --                     0.450               + 4.64
1/1/97-- 8/31/97                10.09            10.24                --                     0.287               + 4.50
                                                                                      Total $1.283
                                                                         Cumulative total return as of 8/31/97:  +27.14%**
*  Figures may include short-term capital gains distributions.
** Figures do not reflect deduction of any sales charge; results would be lower if sales charge was deducted.

</TABLE>



<TABLE>
<CAPTION>


Performance Summary -- Class D Shares

                                    Net Asset Value              Capital Gains
Period Covered                 Beginning         Ending           Distributed           Dividends Paid*          % Change**
<S>                            <C>              <C>                 <C>                    <C>                  <C>
10/21/94 -- 12/31/94            $9.19            $8.98                --                    $0.101               - 1.16%
1995                             8.98            10.11                --                     0.505               +18.60
1996                            10.11            10.10                --                     0.501               + 5.07
1/1/97-- 8/28/97                10.10            10.26                --                     0.320               + 4.95
                                                                                      Total $1.427
                                                                        Cumulative total return as of 8/31/97:  + 29.27%**

*  Figures may include short-term capital gains distributions.
** Figures do not include sales charge; results would be lower if sales charge was included.

</TABLE>



<TABLE>
<CAPTION>


Merrill Lynch California Insured Municipal Bond Fund                                                           August 31, 1997

SCHEDULE OF INVESTMENTS                                                                                          (in Thousands)

S&P          Moody's       Face                                                                                      Value
Ratings      Ratings       Amount                           Issue                                                  (Note 1a)

<S>         <C>          <C>        <C>                                                                           <C>
California -- 96.3%
AAA          Aaa          $1,000     Anaheim, California, Public Financing Authority, Tax Allocation 
                                     Revenue Bonds, RITES, 9.12% due 12/28/2018 (d)(e)                              $1,179
AAA          Aaa           1,290     California Fairs Financing Authority Revenue Bonds, 6.50% due 7/01/2011
                                     (f)                                                                             1,399
AA -         Aa            1,965     California HFA, Home Mortgage Revenue Bonds, AMT, Series F-1, 7% due 
                                     8/01/2026                                                                       2,102
                                     California Health Facilities Financing Authority Revenue Bonds, Series A:
BB           Aaa           2,000     Refunding (Good Samaritan Health System), 7.50% due 5/01/2000 (g)               2,206
AAA          Aaa           2,000     (Scripps Memorial Hospital), 6.375% due 10/01/2022 (d)(h)                       2,170
A1           NR*             300     California Pollution Control Financing Authority, PCR, Refunding (Pacific
                                     Gas and Electric Co.), VRDN, AMT, Series G, 3.50% due 2/01/2016 (a)               300
NR*          P1              100     California Pollution Control Financing Authority, Resource Recovery 
                                     Revenue Refunding Bonds (Ultra Power Malaga Project), VRDN, AMT, Series B,
                                     3.55% due 4/01/2017 (a)                                                           100
                                     California State Public Works Board, Lease Revenue Bonds, Series A (g):
A            Aaa           2,000     (Department of Corrections -- Monterey County Soledad II), 7% due 
                                     11/01/2004                                                                      2,345
AAA          Aaa           2,000     (Various University of California Projects), 6.40% due 12/01/2002 (b)           2,234
AAA          Aaa           2,500     California State, Veterans' Bonds, AMT, UT, Series BD, BE and BF, 6.375%
                                     due 2/01/2027 (b)                                                               2,570
NR*          Aa2             300     California Statewide Community Development Authority, Solid Waste 
                                     Facilities Revenue Bonds (Chevron U.S.A. Inc. Project), VRDN, AMT, 3.50% 
                                     due 12/15/2024 (a)                                                                300
AAA          Aaa           1,200     Cucamonga County, California, Water District Facilities Refinancing Bonds,
                                     COP, 6.50% due 9/01/2022 (c)                                                    1,301
AAA          Aaa           2,000     East Bay, California, Municipal Utilities District, Water System Revenue 
                                     Bonds, 6.50% due 6/01/2004 (b)(g)                                               2,272
AAA          Aaa           4,000     El Cajon, California, Redevelopment Agency, Tax Allocation Bonds (El Cajon 
                                     Redevelopment Project), 6.60% due 10/01/2022 (b)                                4,369
AAA          Aaa           2,500     Fresno, California, Sewer Revenue Bonds (Fowler Avenue Project), Series A,
                                     6.25% due 8/01/2011 (b)                                                         2,684
AAA          Aaa           2,500     Industry, California, Urban Development Agency Refunding Bonds
                                     (Transportation District Industrial Redevelopment Project 2), 6.50% due 
                                     11/01/2016 (d)                                                                  2,739
AAA          Aaa           1,795     Los Angeles, California, Convention and Exhibition Center Authority, Lease 
                                     Revenue Refunding Bonds, Series A, 5.125% due 8/15/2021 (d)                     1,701
A+           Aa3           4,000     Los Angeles, California, Department of Water and Power, Electric Plant 
                                     Revenue Refunding Bonds, 6.375% due 2/01/2020                                   4,277
                                     Los Angeles, California, Harbor Department Revenue Bonds, AMT:
AAA          Aaa           2,000     RITR, 8.795% due 11/01/2026 (d)(e)                                              2,375
AAA          Aaa           2,000     Series B, 6.625% due 8/01/2019 (b)                                              2,167
AAA          Aaa           2,000     Los Angeles, California, Wastewater Systems Revenue Bonds, Series D, 
                                     6.70% due 12/01/2000 (d)(g)                                                     2,193
AAA          Aaa           1,000     Mesa, California, Consolidated Water District, COP (Water Project), 6.375%
                                     due 3/15/2012 (c)                                                               1,072
AAA          Aaa           2,140     Mount Diablo, California, Unified School District, Community Facilities 
                                     -- Special District Tax No. 1, 6.30% due 8/01/2022 (b)                          2,319
AAA          Aaa           2,500     Mountain View, California, Capital Improvements Financing Authority Revenue
                                     Bonds (City Hall Community Theatre), 6.50% due 8/01/2016 (d)                    2,715
AAA          Aaa           3,500     Northern California Public Power Agency, Revenue Refunding Bonds 
                                     (Hydroelectric Project No. 1), Series A, 6.25% due 7/01/2012 (d)                3,778
AAA          Aaa           3,000     Orchard, California, School District, GO, UT, Series A, 6.50% due 8/01/2019
                                     (c)                                                                             3,342
AAA          Aaa           1,500     Rancho, California, Water District Financing Authority, Revenue Refunding 
                                     Bonds, 6.25% due 8/01/2012 (c)                                                  1,607
                                     Sacramento, California, Municipal Utility District, Electric Revenue Bonds:
AAA          Aaa           2,000     INFLOS, 8.868% due 8/15/2018 (c)(e)                                             2,307
AAA          Aaa           3,000     Series B, 6.375% due 8/15/2002 (d)(g)                                           3,333
                                     San Diego, California, Public Facilities Financing Authority, Sewer Revenue
                                     Bonds (c):
AAA          Aaa           2,000     5% due 5/15/2020                                                                1,876
AAA          Aaa           1,500     Series B, 5.25% due 5/15/2027                                                   1,445
                                     San Francisco, California, City and County Airport Commission, International
                                     Airport, Revenue Refunding Bonds, Second Series:
AAA          Aaa           3,750     First Issue, 6.50% due 5/01/2013 (b)                                            4,090
AAA          Aaa           2,500     Second Issue, 6.75% due 5/01/2020 (d)                                           2,784
AAA          Aaa           2,000     Santa Rosa, California, Wastewater Revenue Refunding Bonds (Subregional 
                                     Water Project), Series A, 5% due 9/01/2022 (c)                                  1,878
                                     Stockton, California, Revenue, COP (Wastewater Treatment Plant Expansion),
                                     Series A (c):
AAA          Aaa           2,500     6.70% due 9/01/2014                                                             2,790
AAA          Aaa           2,500     6.80% due 9/01/2024                                                             2,795
AAA          Aaa           2,000     Truckee - Donner, California, Public Utility District, COP (Water System
                                     Improvement Project), 6.75% due 11/15/2001 (d)(g)                               2,233
AAA          Aaa           3,685     University of California Revenue Bonds (Multiple Purpose Projects), 
                                     Series D, 6.30% due 9/01/2015 (d)                                               3,997
AAA          Aaa           1,100     University of California Revenue Bonds, RITR, Series 13, 9.17% due 
                                     9/01/2019 (d)(e)                                                                1,283

Total Investments (Cost -- $83,789) -- 96.3%                                                                        88,627

Variation Margin on Financial Futures Contracts** -- 0.0%                                                              (24)

Other Assets Less Liabilities -- 3.7%                                                                                3,455
                                                                                                                 ---------
Net Assets -- 100.0%                                                                                               $92,058
                                                                                                                 =========

(a) The interest rate is subject to change periodically based upon 
    prevailing market rates. The interest rate shown is the rate is 
    effect at August 31, 1997.
(b) AMBAC Insured.
(c) FGIC Insured.
(d) MBIA Insured.
(e) The interest rate is subject to change periodically and inversely 
    based upon prevailing market rates. The interest rate shown is 
    the rate in effect at August 31, 1997.
(f) FSA Insured.
(g) Prerefunded.
(h) All or a portion of security held as collateral in connection with 
    open financial futures contracts.
*   Not Rated.
**  Financial futures contracts purchased as of August 31, 1997 
    were as follows:
                                                       (in Thousands)
                                                              Value
Number of                               Expiration           (Notes 
Contracts           Issue                  Date              1a & 1b)

40           Municipal Bond Index      December 1997          $4,713
Total Financial Futures Contracts Purchased
(Total Contract Price -- $4,689)                              $4,713
                                                             =======

Ratings of issues shown have not been audited by Deloitte & Touche LLP.

See Notes to Financial Statements.

</TABLE>



PORTFOLIO ABBREVIATIONS

To simplify the listings of Merrill Lynch California Insured Municipal 
Bond Fund's portfolio holdings in the Schedule of Investments, we have 
abbreviated the names of many of the securities according to the list 
at right. 

AMT    Alternative Minimum Tax (subject to)
COP    Certificates of Participation
GO     General Obligation Bonds
HFA    Housing Finance Agency
INFLOS Inverse Floating Rate Municipal Bonds
PCR    Pollution Control Revenue Bonds
RITES  Residual Interest Tax-Exempt Securities
RITR   Residual Interest Trust Receipts
UT     Unlimited Tax
VRDN   Variable Rate Demand Notes




<TABLE>
<CAPTION>

FINANCIAL INFORMATION

Statement of Assets and Liabilities as of August 31, 1997

<S>                  <C>                                                                   <C>              <C>
Assets:               Investments, at value (identified cost -- $83,789,452) (Note 1a)                       $88,626,832
                      Cash                                                                                        48,072
                      Receivables:
                      Securities sold                                                       $3,983,670
                      Interest                                                               1,354,911
                      Beneficial interest sold                                                 115,004         5,453,585
                                                                                           -----------
                      Deferred organization expenses (Note 1e)                                                     5,580
                      Prepaid registration and other assets (Note 1e)                                             40,551
                                                                                                            ------------
                      Total assets                                                                            94,174,620
                                                                                                            ------------

Liabilities:          Payables:
                      Securities purchased                                                   1,692,972
                      Beneficial interest redeemed                                             115,633
                      Dividends to shareholders (Note 1f)                                       78,557
                      Investment adviser (Note 2)                                               35,972
                      Distributor (Note 2)                                                      33,837
                      Variation margin (Note 1b)                                                23,750         1,980,721
                                                                                           -----------
                      Accrued expenses and other liabilities                                                     136,094
                                                                                                            ------------
                      Total liabilities                                                                        2,116,815
                                                                                                            ------------

Net Assets:           Net assets                                                                             $92,057,805
                                                                                                            ============

Net Assets            Class A Shares of beneficial interest, $.10 par value, unlimited
Consist of:           number of shares authorized                                                               $121,365
                      Class B Shares of beneficial interest, $.10 par value, unlimited 
                      number of shares authorized                                                                676,343
                      Class C Shares of beneficial interest, $.10 par value, unlimited 
                      number of shares authorized                                                                 52,334
                      Class D Shares of beneficial interest, $.10 par value, unlimited 
                      number of shares authorized                                                                 48,155
                      Paid-in capital in excess of par                                                        89,111,616
                      Accumulated realized capital losses on investments -- net (Note 5)                      (2,813,138)
                      Unrealized appreciation on investments -- net                                            4,861,130
                                                                                                            ------------
                      Net assets                                                                             $92,057,805
                                                                                                            ============

Net Asset Value:      Class A -- Based on net assets of $12,437,427 and 1,213,650 shares of 
                      beneficial interest outstanding                                                             $10.25
                                                                                                            ============
                      Class B -- Based on net assets of $69,320,188 and 6,763,433 shares of 
                      beneficial interest outstanding                                                             $10.25
                                                                                                            ============
                      Class C -- Based on net assets of $5,361,183 and 523,342 shares of 
                      beneficial interest outstanding                                                             $10.24
                                                                                                            ============
                      Class D -- Based on net assets of $4,939,007 and 481,550 shares of 
                      beneficial interest outstanding                                                             $10.26
                                                                                                            ============

                      See Notes to Financial Statements.

</TABLE>



<TABLE>
<CAPTION>


Statement of Operations

                                                                                                         For the Year Ended
                                                                                                            August 31, 1997

<S>                  <C>                                                               <C>                   <C>
Investment Income     Interest and amortization of premium and discount earned                                $5,411,269
(Note 1d):

Expenses:             Investment advisory fees (Note 2)                                 $525,625
                      Account maintenance and distribution fees -- Class B (Note 2)      359,250
                      Accounting services (Note 2)                                        86,203
                      Registration fees (Note 1e)                                         80,516
                      Professional fees                                                   51,573
                      Printing and shareholder reports                                    38,488
                      Account maintenance and distribution fees -- Class C (Note 2)       31,088
                      Transfer agent fees -- Class B (Note 2)                             22,281
                      Custodian fees                                                      13,474
                      Amortization of organization expenses (Note 1e)                     11,443
                      Pricing fees                                                         7,061
                      Account maintenance fees -- Class D (Note 2)                         4,693
                      Transfer agent fees -- Class A (Note 2)                              3,385
                      Trustees' fees and expenses                                          3,149
                      Transfer agent fees -- Class C (Note 2)                              1,585
                      Transfer agent fees -- Class D (Note 2)                              1,143
                      Other                                                                4,850
                                                                                      ----------
                      Total expenses before reimbursement                              1,245,807
                      Reimbursement of expenses (Note 2)                                (238,835)
                                                                                      ----------
                      Total expenses after reimbursement                                                       1,006,972
                                                                                                              ----------
                      Investment income -- net                                                                 4,404,297
                                                                                                              ----------

Realized &            Realized gain on investments -- net                                                      1,351,724
Unrealized Gain on    Change in unrealized appreciation on investments -- net                                  2,532,891
Investments -- Net                                                                                            ----------
(Notes 1b, 1d & 3):   Net Increase in Net Assets Resulting from Operations                                    $8,288,912
                                                                                                              ==========

                      See Notes to Financial Statements.

</TABLE>



<TABLE>
<CAPTION>


Statements of Changes in Net Assets

                                                                                                For the Year Ended August 31, 
Increase (Decrease) in Net Assets:                                                                1997                1996
<S>                   <C>                                                                     <C>                <C>
Operations:            Investment income -- net                                                $4,404,297         $4,511,142
                       Realized gain on investments -- net                                      1,351,724            605,747
                       Change in unrealized appreciation on investments -- net                  2,532,891          1,181,849
                                                                                              -----------        -----------
                       Net increase in net assets resulting from operations                     8,288,912          6,298,738
                                                                                              -----------        -----------

Dividends to           Investment income -- net:
Shareholders           Class A                                                                   (695,974)          (752,385)
(Note 1f):             Class B                                                                 (3,248,319)        (3,437,910)
                       Class C                                                                   (228,905)          (161,469)
                       Class D                                                                   (231,099)          (159,378)
                                                                                              -----------        -----------
                       Net decrease in net assets resulting from dividends to shareholders     (4,404,297)        (4,511,142)
                                                                                              -----------        -----------

Beneficial Interest    Net increase (decrease) in net assets derived from beneficial 
Transactions           interest transactions                                                   (8,506,453)         5,394,929
(Note 4):                                                                                     -----------        -----------

Net Assets:            Total increase (decrease) in net assets                                 (4,621,838)         7,182,525
                       Beginning of year                                                       96,679,643         89,497,118
                                                                                              -----------        -----------
                       End of year                                                            $92,057,805        $96,679,643
                                                                                              ===========        ===========

                       See Notes to Financial Statements.

</TABLE>



<TABLE>
<CAPTION>


Financial Highlights

                                                                                          Class A
                                                                                                                      For the
                                                                                                                       Period
                                                                                                                       Feb. 26,
The following per share data and ratios have been derived                                                             1993+ to
from information provided in the financial statements.                      For the Year Ended August 31,              Aug. 31,
                                                                  1997         1996          1995          1994          1993
Increase (Decrease) in Net Asset Value:
<S>                 <C>                                         <C>          <C>           <C>          <C>           <C>
Per Share            Net asset value, beginning of period        $9.84        $9.65         $9.54        $10.23        $10.00
Operating                                                    ---------    ---------     ---------     ---------     ---------
Performance:         Investment income -- net                      .50          .52           .52           .51           .24
                     Realized and unrealized gain (loss) on 
                     investments -- net                            .41          .19           .11          (.65)          .23
                                                             ---------    ---------     ---------     ---------     ---------
                     Total from investment operations              .91          .71           .63          (.14)          .47
                                                             ---------    ---------     ---------     ---------     ---------
                     Less dividends and distributions:
                     Investment income -- net                     (.50)        (.52)         (.52)         (.51)         (.24)
                     In excess of realized gain on 
                     investments -- net                             --           --            --          (.04)           --
                                                             ---------    ---------     ---------     ---------     ---------
                     Total dividends and distributions            (.50)        (.52)         (.52)         (.55)         (.24)
                                                             ---------    ---------     ---------     ---------     ---------
                     Net asset value, end of period             $10.25        $9.84         $9.65         $9.54        $10.23
                                                             =========    =========     =========     =========     =========

Total Investment     Based on net asset value per share           9.50%        7.44%         6.94%        (1.44%)        4.81%++++
Return:**                                                    =========    =========     =========     =========     =========

Ratios to Average    Expenses, net of reimbursement                .63%         .49%          .47%          .33%          .14%*
Net Assets:                                                  =========    =========     =========     =========     =========
                     Expenses                                      .89%         .85%          .87%          .96%         1.06%*
                                                             =========    =========     =========     =========     =========
                     Investment income -- net                     5.03%        5.20%         5.53%         5.16%         4.80%*
                                                             =========    =========     =========     =========     =========
Supplemental         Net assets, end of period 
Data:                (in thousands)                            $12,438      $14,183       $14,204       $15,946       $17,105
                                                             =========    =========     =========     =========     =========
                     Portfolio turnover                          67.28%       87.77%        61.53%        93.04%        74.26%
                                                             =========    =========     =========     =========     =========
                   * Annualized. 
                  ** Total investment returns exclude the effects of sales loads.
                   + Commencement of Operations.
                ++++ Aggregate total investment return.

                     See Notes to Financial Statements.


<CAPTION>


                                                                                          Class B
                                                                                                                       For the
                                                                                                                       Period
                                                                                                                       Feb. 26,
The following per share data and ratios have been derived                                                             1993+ to
from information provided in the financial statements.                      For the Year Ended August 31,              Aug. 31,
                                                                  1997         1996          1995          1994          1993
Increase (Decrease) in Net Asset Value:
<S>                 <C>                                         <C>          <C>           <C>          <C>           <C>
Per Share            Net asset value, beginning of period        $9.84        $9.65         $9.54        $10.23        $10.00
Operating                                                    ---------    ---------     ---------     ---------     --------- 
Performance:
                     Investment income -- net                      .45          .47           .48           .46           .22
                     Realized and unrealized gain (loss) on 
                     investments -- net                            .41          .19           .11          (.65)          .23
                                                             ---------    ---------     ---------     ---------     ---------
                     Total from investment operations              .86          .66           .59          (.19)          .45
                                                             ---------    ---------     ---------     ---------     ---------
                     Less dividends and distributions:
                     Investment income -- net                     (.45)        (.47)         (.48)         (.46)         (.22)
                     In excess of realized gain on 
                     investments -- net                             --           --            --          (.04)           --
                                                             ---------    ---------     ---------     ---------     ---------
                     Total dividends and distributions            (.45)        (.47)         (.48)         (.50)         (.22)
                                                             ---------    ---------     ---------     ---------     ---------
                     Net asset value, end of period             $10.25        $9.84         $9.65         $9.54        $10.23
                                                             =========    =========     =========     =========     =========

Total Investment     Based on net asset value per share           8.95%        6.89%         6.38%        (1.93%)        4.56%++++
Return:**                                                    =========    =========     =========     =========     =========

Ratios to Average    Expenses, net of reimbursement               1.14%         .99%          .97%          .83%          .64%*
Net Assets:                                                  =========    =========     =========     =========     =========
                     Expenses                                     1.39%        1.36%         1.38%         1.48%         1.56%*
                                                             =========    =========     =========     =========     =========
                     Investment income -- net                     4.52%        4.69%         5.02%         4.67%         4.31%*
                                                             =========    =========     =========     =========     =========

Supplemental         Net assets, end of period
Data:                (in thousands)                            $69,320      $73,292       $71,670       $74,982       $72,861
                                                             =========    =========     =========     =========     =========
                     Portfolio turnover                          67.28%       87.77%        61.53%        93.04%        74.26%
                                                             =========    =========     =========     =========     =========

                   * Annualized. 
                  ** Total investment returns exclude the effects of sales loads.
                   + Commencement of Operations.
                ++++ Aggregate total investment return.

                     See Notes to Financial Statements.


<CAPTION>


                                                                    Class C                               Class D
                                                                                   For the                             For the
                                                                                   Period                              Period
                                                                   For the         Oct 21,            For the          Oct. 21,
The following per share data and ratios have been derived        Year Ended       1994+ to          Year Ended        1994+ to
from information provided in the financial statements.            August 31,       Aug. 31,          August 31,        Aug. 31,
                                                              1997         1996      1995        1997         1996      1995

Increase (Decrease) in Net Asset Value:
<S>                 <C>                                       <C>        <C>       <C>            <C>        <C>        <C>
Per Share            Net asset value, beginning of period      $9.84      $9.64      $9.19         $9.85      $9.65      $9.19
Operating                                                  ---------  ---------  ---------     ---------  ---------  ---------
Performance:
                     Investment income -- net                    .44        .46        .39           .49        .51        .44
                     Realized and unrealized gain on 
                     investments -- net                          .40        .20        .45           .41        .20        .46
                                                           ---------  ---------  ---------     ---------  ---------  ---------
                     Total from investment operations            .84        .66        .84           .90        .71        .90
                                                           ---------  ---------  ---------     ---------  ---------  ---------
                     Less dividends from investment 
                     income -- net                              (.44)      (.46)      (.39)         (.49)      (.51)      (.44)
                                                           ---------  ---------  ---------     ---------  ---------  ---------
                     Net asset value, end of period           $10.24      $9.84      $9.64        $10.26      $9.85      $9.65
                                                           =========  =========  =========     =========  =========  =========

Total Investment     Based on net asset value per share         8.74%      6.90%      9.38%++++     9.39%      7.44%      9.99%++++
Return:**                                                  =========   ========= =========     =========  =========  =========

Ratios to Average    Expenses, net of reimbursement             1.24%       1.10%     1.09%*         .74%       .59%       .57%*
Net Assets:                                                =========   ========= =========     =========  =========  ========= 
                     Expenses                                   1.49%       1.46%     1.49%*         .98%       .95%       .97%*
                                                           =========  =========  =========     =========  =========  =========
                     Investment income -- net                   4.42%      4.59%      4.76%*        4.92%      5.09%      5.33%*
                                                           =========  =========  =========     =========  =========  =========
Supplemental         Net assets, end of period
Data:                (in thousands)                           $5,361     $4,901     $1,778        $4,939     $4,304     $1,845
                                                           =========  =========  =========     =========  =========  ========= 
                     Portfolio turnover                        67.28%     87.77%     61.53%        67.28%     87.77%     61.53%
                                                           =========  =========  =========     =========  =========  =========

                   * Annualized. 
                  ** Total investment returns exclude the effects of sales loads.
                   + Commencement of Operations.
                ++++ Aggregate total investment return.

                     See Notes to Financial Statements.

</TABLE>



Merrill Lynch California Insured Municipal Bond Fund    August 31, 1997

NOTES TO FINANCIAL STATEMENTS

1. Significant Accounting Policies:
Merrill Lynch California Insured Municipal Bond Fund (the "Fund") is 
part of Merrill Lynch California Municipal Series Trust (the "Trust"). 
The Fund is registered under the Investment Company Act of 1940 as a 
non-diversified, open-end management investment company. The Fund offers 
four classes of shares under the Merrill Lynch Select Pricingsm System. 
Shares of Class A and Class D are sold with a front-end sales charge. 
Shares of Class B and Class C may be subject to a contingent deferred 
sales charge. All classes of shares have identical voting, dividend, 
liquidation and other rights and the same terms and conditions, except 
that Class B, Class C and Class D Shares bear certain expenses related 
to the account maintenance of such shares, and Class B and Class C 
Shares also bear certain expenses related to the distribution of such 
shares. Each class has exclusive voting rights with respect to matters 
relating to its account maintenance and distribution expenditures. The 
following is a summary of significant accounting policies followed by 
the Fund.

(a) Valuation of investments -- Municipal bonds and other portfolio 
securities in which the Fund invests are traded primarily in the over-
the-counter municipal bond and money markets and are valued at the last 
available bid price in the over-the-counter market or on the basis of 
yield equivalents as obtained from one or more dealers that make markets 
in the securities. Financial futures contracts and options thereon, 
which are traded on exchanges, are valued at their settlement prices as 
of the close of such exchanges. Short-term investments with remaining 
maturities of sixty days or less are valued on an amortized cost basis, 
which approximates market value. Securities and assets for which market 
quotations are not readily available are valued at fair value as 
determined in good faith by or under the direction of the Board of 
Trustees of the Trust, including valuations furnished by a pricing 
service retained by the Trust, which may utilize a matrix system for 
valuations. The procedures of the pricing service and its valuations are 
reviewed by the officers of the Trust under the general supervision of 
the Trustees.

(b) Derivative financial instruments -- The Fund may engage in various 
portfolio strategies to seek to increase its return by hedging its 
portfolio against adverse movements in the debt markets. Losses 
may arise due to changes in the value of the contract or if the 
counterparty does not perform under the contract.

[bullet] Financial futures contracts -- The Fund may purchase or sell 
interest rate futures contracts and options on such futures contracts 
for the purpose of hedging the market risk on existing securities or the 
intended purchase of securities. Futures contracts are contracts for 
delayed delivery of securities at a specific future date and at a 
specific price or yield. Upon entering into a contract, the Fund 
deposits and maintains as collateral such initial margin as required by 
the exchange on which the transaction is effected. Pursuant to the 
contract, the Fund agrees to receive from or pay to the broker an amount 
of cash equal to the daily fluctuation in value of the contract. Such 
receipts or payments are known as variation margin and are recorded by 
the Fund as unrealized gains or losses. When the contract is closed, the 
Fund records a realized gain or loss equal to the difference between the 
value of the contract at the time it was opened and the value at the 
time it was closed.

(c) Income taxes -- It is the Fund's policy to comply with the 
requirements of the Internal Revenue Code applicable to regulated 
investment companies and to distribute substantially all of its taxable 
income to its shareholders. Therefore, no Federal income tax provision 
is required.

(d) Security transactions and investment income -- Security transactions 
are recorded on the dates the transactions are entered into (the trade 
dates). Interest income is recognized on the accrual basis. Discounts 
and market premiums are amortized into interest income. Realized gains 
and losses on security transactions are determined on the identified 
cost basis.

(e) Deferred organization expenses and prepaid registration fees -- 
Deferred organization expenses are charged to expense on a straight-line 
basis over a five-year period. Prepaid registration fees are charged to 
expense as the related shares are issued.

(f) Dividends and distributions -- Dividends from net investment income 
are declared daily and paid monthly. Distributions of capital gains are 
recorded on the ex-dividend date.

2. Investment Advisory Agreement and Transactions with Affiliates:
The Fund has entered into an Investment Advisory Agreement with Fund 
Asset Management, L.P. ("FAM"). The general partner of FAM is Princeton 
Services, Inc. ("PSI"), an indirect wholly-owned subsidiary of Merrill 
Lynch & Co., Inc. ("ML & Co."), which is the limited partner. The Fund 
has also entered into a Distribution Agreement and Distribution Plans 
with Merrill Lynch Funds Distributor, Inc. ("MLFD" or "Distributor"), a 
wholly-owned subsidiary of Merrill Lynch Group, Inc.

FAM is responsible for the management of the Fund's portfolio and 
provides the necessary personnel, facilities, equipment and certain 
other services necessary to the operations of the Fund. For such 
services, the Fund pays a monthly fee based upon the average daily value 
of the Fund's net assets at the following annual rates: 0.55% of the 
Fund's average daily net assets not exceeding $500 million; 0.525% of 
average daily net assets in excess of $500 million but not exceeding $1 
billion; and 0.50% of average daily net assets in excess of $1 billion. 
For the year ended August 31, 1997, FAM earned fees of $525,625, of 
which $238,835 was voluntarily waived. 

Pursuant to the distribution plans (the "Distribution Plans") adopted by 
the Fund in accordance with Rule 12b-1 under the Investment Company Act 
of 1940, the Fund pays the Distributor ongoing account maintenance and 
distribution fees. The fees are accrued daily and paid monthly at annual 
rates based upon the average daily net assets of the shares as follows:

                     Account                Distribution 
                 Maintenance Fee                Fee

Class B              0.25%                     0.25%
Class C              0.25%                     0.35%
Class D              0.10%                       --

Pursuant to a sub-agreement with the Distributor, Merrill Lynch, Pierce, 
Fenner & Smith Incorporated ("MLPF&S"), a subsidiary of ML & Co., also 
provides account maintenance and distribution services to the Fund. The 
ongoing account maintenance fee compensates the Distributor and MLPF&S 
for providing account maintenance services to Class B, Class C 
and Class D shareholders. The ongoing distribution fee compensates the 
Distributor and MLPF&S for providing shareholder and distribution-
related services to Class B and Class C shareholders.

For the year ended August 31, 1997, MLFD earned underwriting discounts 
and MLPF&S earned dealer concessions on sales of the Fund's Class A and 
Class D Shares as follows:

                     MLFD                      MLPF&S

Class A             $150                      $1,335
Class D             $503                      $3,096

For the year ended August 31, 1997, MLPF&S received contingent deferred 
sales charges of $133,241 and $1,735 relating to transactions in 
Class B and Class C Shares, respectively.

Merrill Lynch Financial Data Services, Inc. ("MLFDS"), a wholly-owned 
subsidiary of ML & Co., is the Fund's transfer agent.

Accounting services are provided to the Fund by FAM at cost.

Certain officers and/or trustees of the Fund are officers and/or 
directors of FAM, PSI, MLFDS, MLFD, and/or ML & Co.

3. Investments:
Purchases and sales of investments, excluding short-term securities, for 
the year ended August 31, 1997 were $60,586,252 and $68,143,623, 
respectively.

Net realized and unrealized gains as of August 31, 1997 were as follows:

                                 Realized             Unrealized
                                   Gains                Gains

Long-term investments           $1,327,093            $4,837,380
Financial futures contracts         24,631                23,750
                               -----------           -----------
Total                           $1,351,724            $4,861,130
                               ===========           ===========

As of August 31, 1997, net unrealized appreciation for Federal income 
tax purposes aggregated $4,837,380, of which $4,866,392 related to 
appreciated securities and $29,012 related to depreciated securities. 
The aggregate cost of investments at August 31, 1997 for Federal income 
tax purposes was $83,789,452.

4. Beneficial Interest Transactions:
Net increase (decrease) in net assets derived from beneficial interest 
transactions was $(8,506,453) and $5,394,929 for the years ended August 
31, 1997 and August 31, 1996, respectively.

Transactions in shares of beneficial interest for each class were as 
follows:

Class A Shares for the Year                              Dollar
Ended August 31, 1997              Shares                Amount

Shares sold                       167,842             $1,721,861
Shares issued to shareholders 
in reinvestment of dividends       26,473                266,230
                              -----------            -----------
Total issued                      194,315              1,988,091
Shares redeemed                  (422,075)            (4,313,656)
                              -----------            -----------
Net decrease                     (227,760)           $(2,325,565)
                              ===========            ===========

Class A Shares for the Year                              Dollar
Ended August 31, 1996              Shares                Amount

Shares sold                       192,761             $1,890,855
Shares issued to shareholders 
in reinvestment of dividends       28,926                285,031
                              -----------            -----------
Total issued                      221,687              2,175,886
Shares redeemed                  (252,553)            (2,492,063)
                              -----------            -----------
Net decrease                      (30,866)             $(316,177)
                              ===========            ===========

Class B Shares for the Year                              Dollar
Ended August 31, 1997              Shares                Amount

Shares sold                       925,806             $9,285,667
Shares issued to shareholders 
in reinvestment of dividends      132,283              1,330,133
                              -----------            -----------
Total issued                    1,058,089             10,615,800
Automatic conversion 
of shares                         (30,435)              (307,865)
Shares redeemed                (1,712,394)           (17,203,405)
                              -----------            -----------
Net decrease                     (684,740)           $(6,895,470)
                              ===========            ===========

Class B Shares for the Year                              Dollar
Ended August 31, 1996              Shares                Amount

Shares sold                     1,369,886            $13,477,417
Shares issued to shareholders 
in reinvestment of dividends      155,360              1,531,776
                              -----------            -----------
Total issued                    1,525,246             15,009,193
Automatic conversion 
of shares                         (35,131)              (353,395)
Shares redeemed                (1,469,919)           (14,486,720)
                              -----------            -----------
Net increase                       20,196               $169,078
                              ===========            ===========

Class C Shares for the Year                              Dollar
Ended August 31, 1997              Shares                Amount

Shares sold                       252,747             $2,537,534
Shares issued to shareholders 
in reinvestment of dividends       14,024                140,882
                              -----------            -----------
Total issued                      266,771              2,678,416
Shares redeemed                  (241,739)            (2,416,566)
                              -----------            -----------
Net increase                       25,032               $261,850
                              ===========            ===========

Class C Shares for the Year                              Dollar
Ended August 31, 1996              Shares                Amount

Shares sold                       424,343             $4,215,073
Shares issued to shareholders 
in reinvestment of dividends       11,412                112,281
                              -----------            -----------
Total issued                      435,755              4,327,354
Shares redeemed                  (121,901)            (1,209,318)
                              -----------            -----------
Net increase                      313,854             $3,118,036
                              ===========            ===========

Class D Shares for the Year                              Dollar
Ended August 31, 1997              Shares                Amount

Shares sold                        59,711               $601,386
Automatic conversion of shares     30,417                307,865
Shares issued to shareholders 
in reinvestment of dividends       15,575                156,681
                              -----------            -----------
Total issued                      105,703              1,065,932
Shares redeemed                   (61,225)              (613,200)
                              -----------            -----------
Net increase                       44,478               $452,732
                              ===========            ===========

Class D Shares for the Year                              Dollar
Ended August 31, 1996              Shares                Amount

Shares sold                       263,889             $2,602,675
Automatic conversion 
of shares                          35,107                353,395
Shares issued to shareholders 
in reinvestment of dividends       10,947                107,791
                              -----------            -----------
Total issued                      309,943              3,063,861
Shares redeemed                   (63,998)              (639,869)
                              -----------            -----------
Net increase                      245,945             $2,423,992
                              ===========            ===========

5. Capital Loss Carryforward:
At August 31, 1997, the Fund had a net capital loss carryforward of 
approximately $2,594,000, of which $1,578,000 expires in 2003 and 
$1,016,000 expires in 2004. This amount will be available to offset 
like amounts of any future taxable gains.



INDEPENDENT AUDITORS' REPORT 

The Board of Trustees and Shareholders, 
Merrill Lynch California Insured Municipal 
Bond Fund of Merrill Lynch California 
Municipal Series Trust:

We have audited the accompanying statement of assets and liabilities, 
including the schedule of investments, of Merrill Lynch California 
Insured Municipal Bond Fund of Merrill Lynch California Municipal Series 
Trust as of August 31, 1997, the related statements of operations for 
the year then ended and changes in net assets for each of the years in 
the two-year period then ended, and the financial highlights for each of 
the years in the four-year period then ended and for the period February 
26, 1993 (commencement of operations) to August 31, 1993. These 
financial statements and the financial highlights are the responsibility 
of the Fund's management. Our responsibility is to express an opinion on 
these financial statements and the financial highlights based on our 
audits.

We conducted our audits in accordance with generally accepted auditing 
standards. Those standards require that we plan and perform the audit to 
obtain reasonable assurance about whether the financial statements and 
the financial highlights are free of material misstatement. An audit 
includes examining, on a test basis, evidence supporting the amounts and 
disclosures in the financial statements. Our procedures included 
confirmation of securities owned at August 31, 1997 by correspondence 
with the custodian and broker. An audit also includes assessing the 
accounting principles used and significant estimates made by management, 
as well as evaluating the overall financial statement presentation. We 
believe that our audits provide a reasonable basis for our opinion.

In our opinion, such financial statements and financial highlights 
present fairly, in all material respects, the financial position of 
Merrill Lynch California Insured Municipal Bond Fund of Merrill Lynch 
California Municipal Series Trust as of August 31, 1997, the results of 
its operations, the changes in its net assets, and the financial 
highlights for the respective stated periods in conformity with 
generally accepted accounting principles.

Deloitte & Touche LLP
Princeton, New Jersey
October 7, 1997



IMPORTANT TAX INFORMATION (unaudited)

All of the net investment income distributions paid monthly by Merrill 
Lynch California Insured Municipal Bond Fund during its taxable year 
ended August 31, 1997 qualify as tax-exempt interest dividends for 
Federal income tax purposes.

Additionally, there were no capital gains distributions made by the Fund 
during the year.

Please retain this information for your records.



OFFICERS AND TRUSTEES
Arthur Zeikel, President and Trustee
James H. Bodurtha, Trustee
Herbert I. London, Trustee
Robert R. Martin, Trustee
Joseph L. May, Trustee
Andre F. Perold, Trustee
Terry K. Glenn, Executive Vice President
Vincent R. Giordano, Senior Vice President 
Donald C. Burke, Vice President
Kenneth A. Jacob, Vice President
Walter C. O'Connor, Vice President
Gerald M. Richard, Treasurer
Robert E. Putney, III, Secretary

Custodian
The Bank of New York
90 Washington Street, 12th Floor
New York, NY 10286

Transfer Agent
Merrill Lynch Financial Data Services, Inc.
4800 Deer Lake Drive East
Jacksonville, FL 32246-6484
(800) 637-3863





© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission