<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 011
<NAME> CALAMOS CONVERTIBLE FUND CLASS A
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> MAR-31-2000
<PERIOD-START> APR-01-1999
<PERIOD-END> MAR-31-2000
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<SHARES-COMMON-STOCK> 8,675,538
<SHARES-COMMON-PRIOR> 7,759,003
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<DIVIDEND-INCOME> 1,862,786
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<REALIZED-GAINS-CURRENT> 28,016,377
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<EQUALIZATION> 0
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<NET-CHANGE-IN-ASSETS> 64,071,676
<ACCUMULATED-NII-PRIOR> 265,893
<ACCUMULATED-GAINS-PRIOR> (43,240)
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</TABLE>
