<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information
extracted from the TCW Convertible Securities Fund,
Inc. form N-SAR for the period ended June 30, 2000
and is qualified in its entirety by reference to
such financial statements.
</LEGEND>
<SERIES>
<NUMBER> 1
<NAME> TCW Convertible Securities Fund, Inc.
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-END> JUN-30-2000
<INVESTMENTS-AT-COST> 471,868,350
<INVESTMENTS-AT-VALUE> 549,936,324
<RECEIVABLES> 5,573,289
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 555,509,613
<PAYABLE-FOR-SECURITIES> 4,625,000
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 20,812,177
<TOTAL-LIABILITIES> 25,437,177
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 342,711,694
<SHARES-COMMON-STOCK> 42,196,924
<SHARES-COMMON-PRIOR> 42,196,924
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 109,292,768
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 78,067,974
<NET-ASSETS> 530,072,436
<DIVIDEND-INCOME> 3,223,743
<INTEREST-INCOME> 6,435,174
<OTHER-INCOME> 0
<EXPENSES-NET> 1,790,739
<NET-INVESTMENT-INCOME> 7,868,178
<REALIZED-GAINS-CURRENT> 119,372,116
<APPREC-INCREASE-CURRENT> (57,052,688)
<NET-CHANGE-FROM-OPS> 70,187,606
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 7,868,178
<DISTRIBUTIONS-OF-GAINS> 9,854,532
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 0
<NUMBER-OF-SHARES-REDEEMED> 0
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 52,464,896
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> (224,816)
<GROSS-ADVISORY-FEES> 1,426,472
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,790,739
<AVERAGE-NET-ASSETS> 519,183,461
<PER-SHARE-NAV-BEGIN> 11.32
<PER-SHARE-NII> 0.19
<PER-SHARE-GAIN-APPREC> 1.47
<PER-SHARE-DIVIDEND> (0.19)
<PER-SHARE-DISTRIBUTIONS> (0.23)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 12.56
<EXPENSE-RATIO> 0.69
</TABLE>
