<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 060
<NAME> CALAMOS HIGH YIELD FUND
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-2001
<PERIOD-START> APR-01-2000
<PERIOD-END> SEP-30-2000
<INVESTMENTS-AT-COST> 656,072
<INVESTMENTS-AT-VALUE> 652,468
<RECEIVABLES> 16,690
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<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 802,903
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 15,295
<TOTAL-LIABILITIES> 15,295
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 814,021
<SHARES-COMMON-STOCK> 81,770
<SHARES-COMMON-PRIOR> 76,445
<ACCUMULATED-NII-CURRENT> 2,065
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (24,874)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (3,604)
<NET-ASSETS> 787,608
<DIVIDEND-INCOME> 997
<INTEREST-INCOME> 33,528
<OTHER-INCOME> 0
<EXPENSES-NET> 7,427
<NET-INVESTMENT-INCOME> 27,098
<REALIZED-GAINS-CURRENT> (15,574)
<APPREC-INCREASE-CURRENT> 22,397
<NET-CHANGE-FROM-OPS> 33,921
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 25,877
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2,683
<NUMBER-OF-SHARES-REDEEMED> 54
<SHARES-REINVESTED> 2,696
<NET-CHANGE-IN-ASSETS> 59,354
<ACCUMULATED-NII-PRIOR> 844
<ACCUMULATED-GAINS-PRIOR> (9,300)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 2,850
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 54,319
<AVERAGE-NET-ASSETS> 759,332
<PER-SHARE-NAV-BEGIN> 9.53
<PER-SHARE-NII> 0.34
<PER-SHARE-GAIN-APPREC> 0.09
<PER-SHARE-DIVIDEND> 0.33
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.63
<EXPENSE-RATIO> 1.80
</TABLE>
