MFS SERIES TRUST IX /MA/
NSAR-A, 1996-12-27
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<PAGE>      PAGE  1
000 A000000 10/31/96
000 C000000 0000063075
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0.a
000 J000000 A
001 A000000 MFS SERIES TRUST IX
001 B000000 811-2464
001 C000000 6179545000
002 A000000 500 BOYLSTON STREET
002 B000000 BOSTON
002 C000000 MA
002 D010000 02116
003  000000 N
004  000000 N
005  000000 N
006  000000 N
007 A000000 Y
007 B000000  3
007 C010100  1
007 C020100 MFS BOND FUND
007 C030100 N
007 C010200  2
007 C020200 MFS LIMITED MATURITY FUND
007 C030200 N
007 C010300  3
007 C020300 MFS MUNICIPAL LIMITED MATURITY FUND
007 C030300 N
007 C010400  4
007 C010500  5
007 C010600  6
007 C010700  7
007 C010800  8
007 C010900  9
007 C011000 10
008 A00AA01 MASSACHUSETTS FINANCIAL SERVICES COMPANY
008 B00AA01 A
008 C00AA01 801-17352
008 D01AA01 BOSTON
008 D02AA01 MA
008 D03AA01 02116
011 A00AA01 MFS FUND DISTRIBUTORS, INC.
011 B00AA01 8-27864
011 C01AA01 BOSTON
011 C02AA01 MA
011 C03AA01 02116
012 A00AA01 MFS SERVICE CENTER, INC.
012 B00AA01 84-1316
<PAGE>      PAGE  2
012 C01AA01 BOSTON
012 C02AA01 MA
012 C03AA01 02116
013 A00AA01 DELOITTE & TOUCHE LLP
013 B01AA01 BOSTON
013 B02AA01 MA
013 B03AA01 02110
018  00AA00 Y
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019 C00AA00 MASSFINSER
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022 A000004 UBS SECURITIES
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<PAGE>      PAGE  3
022 B000008 13-3227945
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<PAGE>      PAGE  4
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015 A000101 INVESTORS BANK & TRUST COMPANY
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<PAGE>      PAGE  5
024  000100 Y
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<PAGE>      PAGE  6
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<PAGE>      PAGE  7
048 K020100 0.000
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067  000100 N
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070 F020100 N
<PAGE>      PAGE  8
070 G010100 Y
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070 H020100 N
070 I010100 N
070 I020100 N
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<PAGE>      PAGE  9
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015 A000201 INVESTORS BANK & TRUST COMPANY
015 B000201 C
015 C010201 BOSTON
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<PAGE>      PAGE  10
015 C030201 02111
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015 A000202 BANK OF NEW YORK
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015 A000203 CHASE MANHATTAN BANK
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015 E040203 X
024  000200 Y
025 A000201 LEHMAN BROTHERS
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<PAGE>      PAGE  11
028 G020200      4029
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034  000200 Y
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036 A000200 N
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038  000200      0
039  000200 N
040  000200 Y
041  000200 Y
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042 E000200   0
042 F000200   0
042 G000200   0
042 H000200   0
043  000200    275
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045  000200 Y
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048 F020200 0.000
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048 H020200 0.000
<PAGE>      PAGE  12
048 I010200        0
048 I020200 0.000
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048 J020200 0.000
048 K010200        0
048 K020200 0.000
049  000200 N
050  000200 N
051  000200 N
052  000200 N
053 A000200 Y
053 B000200 N
053 C000200 Y
055 A000200 N
055 B000200 N
056  000200 Y
057  000200 N
062 A000200 Y
062 B000200   0.0
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062 D000200   0.0
062 E000200   0.0
062 F000200   0.0
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063 A000200   0
063 B000200  3.8
064 A000200 Y
064 B000200 N
066 A000200 N
067  000200 N
068 A000200 N
068 B000200 N
069  000200 N
070 A010200 Y
070 A020200 Y
070 B010200 N
070 B020200 N
070 C010200 N
070 C020200 N
070 D010200 N
<PAGE>      PAGE  13
070 D020200 N
070 E010200 Y
070 E020200 Y
070 F010200 N
070 F020200 N
070 G010200 Y
070 G020200 N
070 H010200 N
070 H020200 N
070 I010200 N
070 I020200 N
070 J010200 Y
070 J020200 Y
070 K010200 Y
070 K020200 N
070 L010200 Y
070 L020200 Y
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<PAGE>      PAGE  14
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<PAGE>      PAGE  15
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015 A000301 STATE STREET BANK & TRUST COMPANY
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015 A000304 MORGAN GUARANTY TRUST COMPANY
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<PAGE>      PAGE  16
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039  000300 N
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<PAGE>      PAGE  17
046  000300 N
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048 I020300 0.000
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048 J020300 0.000
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048 K020300 0.000
049  000300 N
050  000300 N
051  000300 N
052  000300 N
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056  000300 Y
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<PAGE>      PAGE  18
062 P000300   0.0
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070 D020300 N
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<PAGE>      PAGE  19
071 D000300   50
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SIGNATURE   JAMES O. YOST                                
TITLE       ASSISTANT TREASURER 
 


<TABLE> <S> <C>

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<CIK> 0000063075
<NAME> MFS SERIES TRUST IX
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   <NAME> MFS BOND FUND CLASS A
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</TABLE>

<TABLE> <S> <C>

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<CIK> 0000063075
<NAME> MFS SERIES TRUST IX
<SERIES>
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   <NAME> MFS BOND FUND CLASS B
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<S>                             <C>
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</TABLE>

<TABLE> <S> <C>

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<CIK> 0000063075
<NAME> MFS SERIES TRUST IX
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   <NAME> MFS BOND FUND CLASS C
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</TABLE>

<TABLE> <S> <C>

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<CIK> 0000063075
<NAME> MFS SERIES TRUST IX
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   <NAME> MFS LIMITED MATURITY FUND CLASS A
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</TABLE>

<TABLE> <S> <C>

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<CIK> 0000063075
<NAME> MFS SERIES TRUST IX
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   <NAME> MFS LIMITED MATURITY FUND CLASS B
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</TABLE>

<TABLE> <S> <C>

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<CIK> 0000063075
<NAME> MFS SERIES TRUST IX
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   <NAME> MFS LIMITED MATURITY FUND CLASS C
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<S>                             <C>
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</TABLE>

<TABLE> <S> <C>

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</TABLE>

<TABLE> <S> <C>

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<CIK> 0000063075
<NAME> MFS SERIES TRUST IX
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   <NAME> MFS MUNICIPAL LIMITED FUND CLASS B
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<S>                             <C>
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</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000063075
<NAME> MFS SERIES TRUST IX
<SERIES>
   <NUMBER> 033
   <NAME> MFS MUNICIPAL LIMITED FUND CLASS C
<MULTIPLIER> 1
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
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<PERIOD-END>                               OCT-31-1996
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<INVESTMENTS-AT-VALUE>                        58253395
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</TABLE>


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