MFS SERIES TRUST IX /MA/
NSAR-B, EX-27.4IRESBNDFND, 2000-06-27
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<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000063075
<NAME> MFS SERIES TRUST IX
<SERIES>
   <NUMBER> 044
   <NAME> MFS RESEARCH BOND FUND CLASS I
<MULTIPLIER> 1

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