<PAGE> PAGE 1
000 B000000 02/29/2000
000 C000000 0000356349
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 6.1
000 J000000 A
001 A000000 MFS GOVERNMENT SECURITIES FUND
001 B000000 811-3327
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 N
007 B000000 0
007 C010100 1
007 C010200 2
007 C010300 3
007 C010400 4
007 C010500 5
007 C010600 6
007 C010700 7
007 C010800 8
007 C010900 9
007 C011000 10
008 A000001 MASSACHUSETTS FINANCIAL SERVICES COMPANY
008 B000001 A
008 C000001 801-17352
008 D010001 BOSTON
008 D020001 MA
008 D030001 02116
010 A000001 MASSACHUSETTS FINANCIAL SERVICES COMPANY
010 C010001 BOSTON
010 C020001 MA
010 C030001 02116
011 A000001 MFS FUND DISTRIBUTORS, INC.
011 B000001 8-27864
011 C010001 BOSTON
011 C020001 MA
011 C030001 02116
012 A000001 MFS SERVICE CENTER, INC.
012 B000001 84-1316
012 C010001 BOSTON
012 C020001 MA
<PAGE> PAGE 2
012 C030001 02116
013 A000001 DELOITTE & TOUCHE LLP
013 B010001 BOSTON
013 B020001 MA
013 B030001 02110
015 A000001 STATE STREET BANK AND TRUST COMPANY
015 B000001 C
015 C010001 BOSTON
015 C020001 MA
015 C030001 02110
015 E010001 X
015 A000002 THE BANK OF NEW YORK
015 B000002 S
015 C010002 NEW YORK
015 C020002 NY
015 C030002 10286
015 E010002 X
018 000000 Y
019 A000000 Y
019 B000000 53
019 C000000 MASSFINSER
020 C000001 0
020 C000002 0
020 C000003 0
020 C000004 0
020 C000005 0
020 C000006 0
020 C000007 0
020 C000008 0
020 C000009 0
020 C000010 0
021 000000 0
022 A000001 GOLDMAN SACHS & CO.
022 B000001 13-5108880
022 C000001 5109885
022 D000001 103099
022 A000002 BEAR STEARNS SECURITIES
022 B000002 13-3299429
022 C000002 160865
022 D000002 144474
022 A000003 MERRILL LYNCH
022 B000003 13-5674085
022 C000003 108009
022 D000003 127884
022 A000004 WARBURG DILLON
022 B000004 00-0000000
022 C000004 111044
022 D000004 115576
022 A000005 MORGAN, J.P. SECURITIES
022 B000005 13-3224016
022 C000005 71411
<PAGE> PAGE 3
022 D000005 90460
022 A000006 LEHMAN BROTHERS
022 B000006 13-2518466
022 C000006 48312
022 D000006 20267
022 A000007 BANK OF NEW YORK
022 B000007 00-0000000
022 C000007 27954
022 D000007 27606
022 A000008 DONALDSON LUFKIN
022 B000008 13-2741729
022 C000008 55279
022 D000008 0
022 A000009 PRUDENTIAL SECURITIES
022 B000009 22-2347336
022 C000009 49122
022 D000009 1998
022 A000010 BANK OF AMERICA
022 B000010 94-1687665
022 C000010 41034
022 D000010 0
023 C000000 5867728
023 D000000 653378
024 000000 Y
025 A000001 GOLDMAN SACHS
025 B000001 13-5108880
025 C000001 D
025 D000001 1068
025 D000002 0
025 D000003 0
025 D000004 0
025 D000005 0
025 D000006 0
025 D000007 0
025 D000008 0
026 A000000 Y
026 B000000 Y
026 C000000 N
026 D000000 Y
026 E000000 N
026 F000000 N
026 G010000 N
026 G020000 N
026 H000000 N
027 000000 Y
028 A010000 46640
028 A020000 1986
028 A030000 0
028 A040000 45364
028 B010000 28785
028 B020000 2018
<PAGE> PAGE 4
028 B030000 0
028 B040000 40706
028 C010000 29102
028 C020000 2008
028 C030000 0
028 C040000 32566
028 D010000 29264
028 D020000 1985
028 D030000 0
028 D040000 42474
028 E010000 32478
028 E020000 1928
028 E030000 0
028 E040000 43534
028 F010000 28901
028 F020000 1924
028 F030000 0
028 F040000 47510
028 G010000 195170
028 G020000 11849
028 G030000 0
028 G040000 252154
028 H000000 154428
029 000000 Y
030 A000000 1304
030 B000000 4.75
030 C000000 0.00
031 A000000 191
031 B000000 0
032 000000 1113
033 000000 0
034 000000 Y
035 000000 587
036 A000000 N
036 B000000 0
037 000000 N
038 000000 0
039 000000 N
040 000000 Y
041 000000 Y
042 A000000 0
042 B000000 0
042 C000000 46
042 D000000 54
042 E000000 0
042 F000000 0
042 G000000 0
042 H000000 0
043 000000 3618
044 000000 0
045 000000 Y
<PAGE> PAGE 5
046 000000 N
047 000000 N
048 000000 0.000
048 A010000 0
048 A020000 0.000
048 B010000 0
048 B020000 0.000
048 C010000 0
048 C020000 0.000
048 D010000 0
048 D020000 0.000
048 E010000 0
048 E020000 0.000
048 F010000 0
048 F020000 0.000
048 G010000 0
048 G020000 0.000
048 H010000 0
048 H020000 0.000
048 I010000 0
048 I020000 0.000
048 J010000 0
048 J020000 0.000
048 K010000 0
048 K020000 0.000
049 000000 N
050 000000 Y
051 000000 N
052 000000 N
053 A000000 Y
053 B000000 Y
053 C000000 Y
054 A000000 Y
054 B000000 N
054 C000000 N
054 D000000 N
054 E000000 N
054 F000000 N
054 G000000 N
054 H000000 Y
054 I000000 N
054 J000000 Y
054 K000000 N
054 L000000 N
054 M000000 Y
054 N000000 N
054 O000000 N
055 A000000 Y
055 B000000 N
056 000000 Y
057 000000 N
<PAGE> PAGE 6
058 A000000 N
059 000000 Y
060 A000000 Y
060 B000000 Y
061 000000 1000
062 A000000 Y
062 B000000 0.0
062 C000000 0.0
062 D000000 0.2
062 E000000 0.0
062 F000000 0.0
062 G000000 0.0
062 H000000 0.0
062 I000000 0.0
062 J000000 0.0
062 K000000 0.0
062 L000000 0.0
062 M000000 16.9
062 N000000 82.4
062 O000000 0.0
062 P000000 0.0
062 Q000000 0.0
062 R000000 0.0
063 A000000 0
063 B000000 6.7
064 A000000 Y
064 B000000 N
066 A000000 N
067 000000 N
068 A000000 N
068 B000000 N
069 000000 N
070 A010000 Y
070 A020000 Y
070 B010000 N
070 B020000 N
070 C010000 N
070 C020000 N
070 D010000 N
070 D020000 N
070 E010000 N
070 E020000 N
070 F010000 N
070 F020000 N
070 G010000 N
070 G020000 N
070 H010000 N
070 H020000 N
070 I010000 N
070 I020000 N
070 J010000 Y
<PAGE> PAGE 7
070 J020000 N
070 K010000 Y
070 K020000 N
070 L010000 N
070 L020000 N
070 M010000 N
070 M020000 N
070 N010000 Y
070 N020000 Y
070 O010000 Y
070 O020000 N
070 P010000 Y
070 P020000 N
070 Q010000 N
070 Q020000 N
070 R010000 N
070 R020000 N
071 A000000 705106
071 B000000 668718
071 C000000 538796
071 D000000 124
072 A000000 12
072 B000000 39287
072 C000000 0
072 D000000 0
072 E000000 0
072 F000000 2253
072 G000000 73
072 H000000 0
072 I000000 568
072 J000000 171
072 K000000 86
072 L000000 74
072 M000000 56
072 N000000 0
072 O000000 0
072 P000000 0
072 Q000000 0
072 R000000 35
072 S000000 7
072 T000000 3343
072 U000000 0
072 V000000 0
072 W000000 388
072 X000000 7054
072 Y000000 655
072 Z000000 32888
072AA000000 0
072BB000000 15148
072CC010000 0
072CC020000 19119
<PAGE> PAGE 8
072DD010000 19903
072DD020000 9295
072EE000000 0
073 A010000 0.5500
073 A020000 0.4900
073 B000000 0.0000
073 C000000 0.0000
074 A000000 82
074 B000000 1068
074 C000000 0
074 D000000 519553
074 E000000 0
074 F000000 0
074 G000000 0
074 H000000 0
074 I000000 0
074 J000000 17173
074 K000000 0
074 L000000 8205
074 M000000 24374
074 N000000 570455
074 O000000 17103
074 P000000 14
074 Q000000 0
074 R010000 0
074 R020000 0
074 R030000 0
074 R040000 30235
074 S000000 0
074 T000000 523103
074 U010000 35880
074 U020000 17120
074 V010000 9.15
074 V020000 9.14
074 W000000 0.0000
074 X000000 35461
074 Y000000 0
075 A000000 0
075 B000000 565469
076 000000 0.00
077 A000000 Y
077 B000000 Y
078 000000 N
080 A000000 NATIONAL UNION INSURANCE
080 C000000 90000
081 A000000 Y
081 B000000 131
082 A000000 Y
082 B000000 100
083 A000000 N
083 B000000 0
<PAGE> PAGE 9
084 A000000 N
084 B000000 0
085 A000000 Y
085 B000000 N
086 A010000 0
086 A020000 0
086 B010000 0
086 B020000 0
086 C010000 0
086 C020000 0
086 D010000 0
086 D020000 0
086 E010000 0
086 E020000 0
086 F010000 0
086 F020000 0
SIGNATURE ELLEN M. MOYNIHAN
TITLE ASSISTANT TREASURER
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000356349
<NAME> MFS GOVERNMENT SECURITIES FUND
<SERIES>
<NUMBER> 011
<NAME> CLASS A
<MULTIPLIER> 1
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> FEB-29-2000
<PERIOD-START> MAR-1-1999
<PERIOD-END> FEB-29-2000
<INVESTMENTS-AT-COST> 541207233
<INVESTMENTS-AT-VALUE> 520621430
<RECEIVABLES> 25377306
<ASSETS-OTHER> 24374319
<OTHER-ITEMS-ASSETS> 82310
<TOTAL-ASSETS> 570455365
<PAYABLE-FOR-SECURITIES> 17103250
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 30248810
<TOTAL-LIABILITIES> 47352060
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 584769981
<SHARES-COMMON-STOCK> 35879960
<SHARES-COMMON-PRIOR> 34684648
<ACCUMULATED-NII-CURRENT> 1215695
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> (42296568)
<ACCUM-APPREC-OR-DEPREC> (20585803)
<NET-ASSETS> 523103305
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 39287549
<OTHER-INCOME> 0
<EXPENSES-NET> (6399234)
<NET-INVESTMENT-INCOME> 32888315
<REALIZED-GAINS-CURRENT> (15148397)
<APPREC-INCREASE-CURRENT> (19118548)
<NET-CHANGE-FROM-OPS> (1378630)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (19903251)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 39616965
<NUMBER-OF-SHARES-REDEEMED> (40006876)
<SHARES-REINVESTED> 1585223
<NET-CHANGE-IN-ASSETS> (29432033)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> (90728)
<OVERDIST-NET-GAINS-PRIOR> (27191429)
<GROSS-ADVISORY-FEES> 2252607
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 7053833
<AVERAGE-NET-ASSETS> 565469438
<PER-SHARE-NAV-BEGIN> 9.69
<PER-SHARE-NII> 0.57
<PER-SHARE-GAIN-APPREC> (0.56)
<PER-SHARE-DIVIDEND> (0.55)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.15
<EXPENSE-RATIO> 0.90
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000356349
<NAME> MFS GOVERNMENT SECURITIES FUND
<SERIES>
<NUMBER> 012
<NAME> CLASS B
<MULTIPLIER> 1
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> FEB-29-2000
<PERIOD-START> MAR-1-1999
<PERIOD-END> FEB-29-2000
<INVESTMENTS-AT-COST> 541207233
<INVESTMENTS-AT-VALUE> 520621430
<RECEIVABLES> 25377306
<ASSETS-OTHER> 24374319
<OTHER-ITEMS-ASSETS> 82310
<TOTAL-ASSETS> 570455365
<PAYABLE-FOR-SECURITIES> 17103250
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 30248810
<TOTAL-LIABILITIES> 47352060
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 584769981
<SHARES-COMMON-STOCK> 17120031
<SHARES-COMMON-PRIOR> 17935037
<ACCUMULATED-NII-CURRENT> 1215695
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> (42296568)
<ACCUM-APPREC-OR-DEPREC> (20585803)
<NET-ASSETS> 523103305
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 39287549
<OTHER-INCOME> 0
<EXPENSES-NET> (6399234)
<NET-INVESTMENT-INCOME> 32888315
<REALIZED-GAINS-CURRENT> (15148397)
<APPREC-INCREASE-CURRENT> (19118548)
<NET-CHANGE-FROM-OPS> (1378630)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (9295018)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 9138245
<NUMBER-OF-SHARES-REDEEMED> (10657927)
<SHARES-REINVESTED> 704676
<NET-CHANGE-IN-ASSETS> (29432033)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> (90728)
<OVERDIST-NET-GAINS-PRIOR> (27191429)
<GROSS-ADVISORY-FEES> 2252607
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 7053833
<AVERAGE-NET-ASSETS> 565469438
<PER-SHARE-NAV-BEGIN> 9.68
<PER-SHARE-NII> 0.51
<PER-SHARE-GAIN-APPREC> (0.56)
<PER-SHARE-DIVIDEND> (0.49)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.14
<EXPENSE-RATIO> 1.55
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000356349
<NAME> MFS GOVERNMENT SECURITIES FUND
<SERIES>
<NUMBER> 013
<NAME> CLASS C
<MULTIPLIER> 1
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> FEB-29-2000
<PERIOD-START> MAR-1-1999
<PERIOD-END> FEB-29-2000
<INVESTMENTS-AT-COST> 541207233
<INVESTMENTS-AT-VALUE> 520621430
<RECEIVABLES> 25377306
<ASSETS-OTHER> 24374319
<OTHER-ITEMS-ASSETS> 82310
<TOTAL-ASSETS> 570455365
<PAYABLE-FOR-SECURITIES> 17103250
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 30248810
<TOTAL-LIABILITIES> 47352060
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 584769981
<SHARES-COMMON-STOCK> 3564474
<SHARES-COMMON-PRIOR> 3740803
<ACCUMULATED-NII-CURRENT> 1215695
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> (42296568)
<ACCUM-APPREC-OR-DEPREC> (20585803)
<NET-ASSETS> 523103305
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 39287549
<OTHER-INCOME> 0
<EXPENSES-NET> (6399234)
<NET-INVESTMENT-INCOME> 32888315
<REALIZED-GAINS-CURRENT> (15148397)
<APPREC-INCREASE-CURRENT> (19118548)
<NET-CHANGE-FROM-OPS> (1378630)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (1954103)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 4365724
<NUMBER-OF-SHARES-REDEEMED> (4686351)
<SHARES-REINVESTED> 144298
<NET-CHANGE-IN-ASSETS> (29432033)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> (90728)
<OVERDIST-NET-GAINS-PRIOR> (27191429)
<GROSS-ADVISORY-FEES> 2252607
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 7053833
<AVERAGE-NET-ASSETS> 565469438
<PER-SHARE-NAV-BEGIN> 9.71
<PER-SHARE-NII> 0.52
<PER-SHARE-GAIN-APPREC> (0.56)
<PER-SHARE-DIVIDEND> (0.49)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.18
<EXPENSE-RATIO> 1.55
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000356349
<NAME> MFS GOVERNMENT SECURITIES FUND
<SERIES>
<NUMBER> 014
<NAME> CLASS I
<MULTIPLIER> 1
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> FEB-29-2000
<PERIOD-START> MAR-1-1999
<PERIOD-END> FEB-29-2000
<INVESTMENTS-AT-COST> 541207233
<INVESTMENTS-AT-VALUE> 520621430
<RECEIVABLES> 25377306
<ASSETS-OTHER> 24374319
<OTHER-ITEMS-ASSETS> 82310
<TOTAL-ASSETS> 570455365
<PAYABLE-FOR-SECURITIES> 17103250
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 30248810
<TOTAL-LIABILITIES> 47352060
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 584769981
<SHARES-COMMON-STOCK> 609481
<SHARES-COMMON-PRIOR> 684831
<ACCUMULATED-NII-CURRENT> 1215695
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> (42296568)
<ACCUM-APPREC-OR-DEPREC> (20585803)
<NET-ASSETS> 523103305
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 39287549
<OTHER-INCOME> 0
<EXPENSES-NET> (6399234)
<NET-INVESTMENT-INCOME> 32888315
<REALIZED-GAINS-CURRENT> (15148397)
<APPREC-INCREASE-CURRENT> (19118548)
<NET-CHANGE-FROM-OPS> (1378630)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (386262)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 22849
<NUMBER-OF-SHARES-REDEEMED> (139645)
<SHARES-REINVESTED> 41446
<NET-CHANGE-IN-ASSETS> (29432033)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> (90728)
<OVERDIST-NET-GAINS-PRIOR> (27191429)
<GROSS-ADVISORY-FEES> 2252607
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 7053833
<AVERAGE-NET-ASSETS> 565469438
<PER-SHARE-NAV-BEGIN> 9.69
<PER-SHARE-NII> 0.60
<PER-SHARE-GAIN-APPREC> (0.56)
<PER-SHARE-DIVIDEND> (0.58)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.15
<EXPENSE-RATIO> 0.55
</TABLE>
INDEPENDENT AUDITORS' REPORT
To the Trustees and Shareholders of MFS Government Securities Fund:
In planning and performing our audit of the financial statements of MFS
Government Securities Fund (the "Fund") for the year ended February 29, 2000 (on
which we have issued our report dated April 6, 2000), we considered its internal
control, including control activities for safeguarding securities, in order to
determine our auditing procedures for the purpose of expressing our opinion on
the financial statements and to comply with the requirements of Form N-SAR, and
not to provide assurance on the Fund's internal control.
The management of the Fund is responsible for establishing and maintaining
internal control. In fulfilling this responsibility, estimates and judgments by
management are required to assess the expected benefits and related costs of
controls. Generally, controls that are relevant to an audit pertain to the
entity's objective of preparing financial statements for external purposes that
are fairly presented in conformity with generally accepted accounting
principles. Those controls include the safeguarding of assets against
unauthorized acquisition, use or disposition.
Because of inherent limitations in any internal control, misstatements due to
error or fraud may occur and not be detected. Also, projections of any
evaluation of internal control to future periods are subject to the risk that
the internal control may become inadequate because of changes in conditions or
that the degree of compliance with policies or procedures deteriorates.
Our consideration of the Fund's internal control would not necessarily disclose
all matters in internal control that might be material weaknesses under
standards established by the American Institute of Certified Public Accountants.
A material weakness is a condition in which the design or operation of one or
more of the internal control components does not reduce to a relatively low
level the risk that misstatements caused by error or fraud in amounts that would
be material in relation to the financial statements being audited may occur and
not be detected within a timely period by employees in the normal course of
performing their assigned functions. However, we noted no matters involving the
Fund's internal control and its operation, including controls for safeguarding
securities that we consider to be material weaknesses as defined above as of
February 29, 2000.
This report is intended solely for the information and use of management, the
Board of Trustees and Shareholders of MFS Government Securities Fund, and the
Securities and Exchange Commission and is not intended to be and should not be
used by anyone other than these specified parties.
DELOITTE & TOUCHE LLP
Boston, Massachusetts
April 6, 2000
