<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
INSURED CALIFORNIA MUNI SECURITIES
</LEGEND>
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-2000
<PERIOD-END> APR-30-2000
<INVESTMENTS-AT-COST> 56,635,190
<INVESTMENTS-AT-VALUE> 58,254,026
<RECEIVABLES> 1,014,270
<ASSETS-OTHER> 108,878
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 59,376,354
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> (73,372)
<TOTAL-LIABILITIES> (73,372)
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 57,664,518
<SHARES-COMMON-STOCK> 4,068,813
<SHARES-COMMON-PRIOR> 4,145,213
<ACCUMULATED-NII-CURRENT> 254,257
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (234,629)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 1,618,836
<NET-ASSETS> 59,302,982
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 1,698,234
<OTHER-INCOME> 0
<EXPENSES-NET> (169,391)
<NET-INVESTMENT-INCOME> 1,528,843
<REALIZED-GAINS-CURRENT> 189,886
<APPREC-INCREASE-CURRENT> 339,146
<NET-CHANGE-FROM-OPS> 2,057,875
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (1,540,741)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 0
<NUMBER-OF-SHARES-REDEEMED> (76,400)
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> (470,977)
<ACCUMULATED-NII-PRIOR> 267,304
<ACCUMULATED-GAINS-PRIOR> (424,515)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> (103,940)
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (172,187)
<AVERAGE-NET-ASSETS> 59,394,465
<PER-SHARE-NAV-BEGIN> 14.42
<PER-SHARE-NII> 0.37
<PER-SHARE-GAIN-APPREC> 0.17
<PER-SHARE-DIVIDEND> (0.38)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 14.58
<EXPENSE-RATIO> 0.58
</TABLE>
