<PAGE> PAGE 1
000 A000000 12/31/98
000 C000000 0000276776
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0
000 J000000 A
001 A000000 PIONEER BOND FUND
001 B000000 811-2864
001 C000000 6177427825
002 A000000 60 STATE STREET
002 B000000 BOSTON
002 C000000 MA
002 D010000 02109
002 D020000 1820
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 PIONEER INVESTMENT MANAGEMENT, INC.
008 B000001 A
008 C000001 801-8255
008 D010001 BOSTON
008 D020001 MA
008 D030001 02109
008 D040001 1820
010 A000001 PIONEER INVESTMENT MANAGEMENT, INC.
010 B000001 801-8255
010 C010001 BOSTON
010 C020001 MA
010 C030001 02109
010 C040001 1820
011 A000001 PIONEER FUNDS DISTRIBUTOR, INC.
011 B000001 8-41256
011 C010001 BOSTON
011 C020001 MA
011 C030001 02109
<PAGE> PAGE 2
011 C040001 1820
012 A000001 PIONEERING SERVICES CORPORATION
012 B000001 84-1359
012 C010001 BOSTON
012 C020001 MA
012 C030001 02109
012 C040001 1820
013 A000001 ARTHUR ANDERSEN LLP
013 B010001 BOSTON
013 B020001 MA
013 B030001 02110
013 B040001 2812
015 A000001 BROWN BROTHERS HARRIMAN & CO.
015 B000001 C
015 C010001 BOSTON
015 C020001 MA
015 C030001 02109
015 C040001 1975
015 E010001 X
018 000000 Y
019 A000000 Y
019 B000000 36
019 C000000 PIONEERFDS
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 BROWN BROTHERS
022 B000001 13-4973745
022 C000001 301600
022 D000001 0
022 A000002 HOUSEHOLD FINANCE
022 B000002 36-1239445
022 C000002 240727
022 D000002 0
022 A000003 EXXON CREDIT CORP.
022 C000003 82779
022 D000003 0
022 A000004 FORD MOTOR CREDIT
022 B000004 38-1612444
022 C000004 75060
022 D000004 0
022 A000005 EXXON ASSET MANAGEMENT
022 C000005 46049
<PAGE> PAGE 3
022 D000005 0
022 A000006 HSBC SECURITIES
022 B000006 13-2650272
022 C000006 10423
022 D000006 9998
022 A000007 TRAVELERS/AETNA PROP.
022 C000007 17201
022 D000007 0
022 A000008 CITIGROUP, INC.
022 C000008 15528
022 D000008 0
022 A000009 MERRIL LYNCH
022 B000009 13-5674085
022 C000009 9226
022 D000009 4319
022 A000010 BEAR, STEARNS
022 B000010 13-3299429
022 C000010 10016
022 D000010 3394
023 C000000 864058
023 D000000 23560
024 000000 N
025 D000001 0
025 D000002 0
025 D000003 0
025 D000004 0
025 D000005 0
025 D000006 0
025 D000007 0
025 D000008 0
026 A000000 N
026 B000000 N
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 12501
028 A020000 583
028 A030000 0
028 A040000 9038
028 B010000 23193
028 B020000 596
028 B030000 0
028 B040000 9094
028 C010000 15841
028 C020000 595
028 C030000 0
<PAGE> PAGE 4
028 C040000 14941
028 D010000 23243
028 D020000 517
028 D030000 0
028 D040000 17216
028 E010000 18056
028 E020000 791
028 E030000 0
028 E040000 12641
028 F010000 19432
028 F020000 689
028 F030000 0
028 F040000 16200
028 G010000 112266
028 G020000 3771
028 G030000 0
028 G040000 79130
028 H000000 12923
029 000000 Y
030 A000000 300
030 B000000 4.50
030 C000000 0.00
031 A000000 29
031 B000000 0
032 000000 271
033 000000 0
034 000000 Y
035 000000 47
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 0
042 D000000 100
042 E000000 0
042 F000000 0
042 G000000 0
042 H000000 0
043 000000 419
044 000000 0
045 000000 Y
046 000000 N
047 000000 Y
048 000000 0.500
048 A010000 0
048 A020000 0.000
<PAGE> PAGE 5
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 N
051 000000 N
052 000000 N
053 A000000 N
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 N
055 B000000 N
056 000000 Y
057 000000 N
058 A000000 N
059 000000 Y
060 A000000 Y
060 B000000 Y
061 000000 1000
062 A000000 Y
062 B000000 0.0
<PAGE> PAGE 6
062 C000000 2.0
062 D000000 0.0
062 E000000 0.0
062 F000000 0.0
062 G000000 0.0
062 H000000 0.0
062 I000000 2.4
062 J000000 0.0
062 K000000 0.0
062 L000000 1.4
062 M000000 23.0
062 N000000 22.5
062 O000000 0.0
062 P000000 44.9
062 Q000000 1.6
062 R000000 0.0
063 A000000 0
063 B000000 8.1
064 A000000 N
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 N
070 J020000 N
070 K010000 N
070 K020000 N
070 L010000 Y
070 L020000 N
070 M010000 N
070 M020000 N
<PAGE> PAGE 7
070 N010000 Y
070 N020000 N
070 O010000 Y
070 O020000 N
070 P010000 N
070 P020000 N
070 Q010000 N
070 Q020000 N
070 R010000 Y
070 R020000 N
071 A000000 61693
071 B000000 29971
071 C000000 166915
071 D000000 18
072 A000000 6
072 B000000 6297
072 C000000 0
072 D000000 0
072 E000000 0
072 F000000 358
072 G000000 36
072 H000000 0
072 I000000 148
072 J000000 14
072 K000000 0
072 L000000 10
072 M000000 12
072 N000000 7
072 O000000 0
072 P000000 0
072 Q000000 0
072 R000000 8
072 S000000 4
072 T000000 419
072 U000000 0
072 V000000 0
072 W000000 4
072 X000000 1020
072 Y000000 0
072 Z000000 5277
072AA000000 723
072BB000000 0
072CC010000 654
072CC020000 0
072DD010000 3829
072DD020000 1370
072EE000000 0
073 A010000 0.0000
073 A020000 0.0000
073 B000000 0.0000
073 C000000 0.0000
<PAGE> PAGE 8
074 A000000 1
074 B000000 0
074 C000000 4632
074 D000000 183221
074 E000000 0
074 F000000 0
074 G000000 0
074 H000000 0
074 I000000 0
074 J000000 0
074 K000000 0
074 L000000 5936
074 M000000 6
074 N000000 193796
074 O000000 0
074 P000000 186
074 Q000000 0
074 R010000 0
074 R020000 0
074 R030000 0
074 R040000 1520
074 S000000 0
074 T000000 192090
074 U010000 14044
074 U020000 6297
074 V010000 0.00
074 V020000 0.00
074 W000000 0.0000
074 X000000 10242
074 Y000000 6495
075 A000000 0
075 B000000 174810
076 000000 0.00
077 A000000 N
078 000000 N
080 A000000 ICI MUTUAL INSURANCE
080 B000000 NONE
080 C000000 25000
081 A000000 Y
081 B000000 36
082 A000000 N
082 B000000 0
083 A000000 N
083 B000000 0
084 A000000 N
084 B000000 0
085 A000000 Y
085 B000000 N
086 A010000 0
086 A020000 0
086 B010000 0
<PAGE> PAGE 9
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 ROBERT P. NAULT
TITLE ASST. SECRETARY
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000276776
<NAME> PIONEER BOND FUND
<SERIES>
<NUMBER> 001
<NAME> PIONEER BOND FUND CLASS A
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> JUN-30-1999
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 180565404
<INVESTMENTS-AT-VALUE> 187853349
<RECEIVABLES> 5936402
<ASSETS-OTHER> 5582
<OTHER-ITEMS-ASSETS> 516
<TOTAL-ASSETS> 193795849
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1705631
<TOTAL-LIABILITIES> 1705631
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 188706765
<SHARES-COMMON-STOCK> 14043549
<SHARES-COMMON-PRIOR> 12202078
<ACCUMULATED-NII-CURRENT> 93094
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 3997586
<ACCUM-APPREC-OR-DEPREC> 7287945
<NET-ASSETS> 192090218
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 6297045
<OTHER-INCOME> 0
<EXPENSES-NET> 1019908
<NET-INVESTMENT-INCOME> 5277137
<REALIZED-GAINS-CURRENT> 723220
<APPREC-INCREASE-CURRENT> 653877
<NET-CHANGE-FROM-OPS> 6654234
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 3829383
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 7739227
<NUMBER-OF-SHARES-REDEEMED> 6209098
<SHARES-REINVESTED> 311342
<NET-CHANGE-IN-ASSETS> 38361684
<ACCUMULATED-NII-PRIOR> 15047
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 4720806
<GROSS-ADVISORY-FEES> 358045
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1046508
<AVERAGE-NET-ASSETS> 123848605
<PER-SHARE-NAV-BEGIN> 9.37
<PER-SHARE-NII> 0.29
<PER-SHARE-GAIN-APPREC> 0.09
<PER-SHARE-DIVIDEND> 0.29
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.46
<EXPENSE-RATIO> 0.95
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000276776
<NAME> PIONEER BOND FUND
<SERIES>
<NUMBER> 002
<NAME> PIONEER BOND FUND CLASS B
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> JUN-30-1999
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 180565404
<INVESTMENTS-AT-VALUE> 187853349
<RECEIVABLES> 5936402
<ASSETS-OTHER> 5582
<OTHER-ITEMS-ASSETS> 516
<TOTAL-ASSETS> 193795849
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1705631
<TOTAL-LIABILITIES> 1705631
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 188706765
<SHARES-COMMON-STOCK> 4882034
<SHARES-COMMON-PRIOR> 3311042
<ACCUMULATED-NII-CURRENT> 93094
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 3997586
<ACCUM-APPREC-OR-DEPREC> 7287945
<NET-ASSETS> 192090218
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 6297045
<OTHER-INCOME> 0
<EXPENSES-NET> 1019908
<NET-INVESTMENT-INCOME> 5277137
<REALIZED-GAINS-CURRENT> 723220
<APPREC-INCREASE-CURRENT> 653877
<NET-CHANGE-FROM-OPS> 6654234
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 1056742
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2755599
<NUMBER-OF-SHARES-REDEEMED> 1256816
<SHARES-REINVESTED> 72209
<NET-CHANGE-IN-ASSETS> 38361684
<ACCUMULATED-NII-PRIOR> 15047
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 4720806
<GROSS-ADVISORY-FEES> 358045
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1046508
<AVERAGE-NET-ASSETS> 39409119
<PER-SHARE-NAV-BEGIN> 9.33
<PER-SHARE-NII> 0.25
<PER-SHARE-GAIN-APPREC> 0.09
<PER-SHARE-DIVIDEND> 0.25
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.42
<EXPENSE-RATIO> 1.71
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000276776
<NAME> PIONEER BOND FUND
<SERIES>
<NUMBER> 003
<NAME> PIONEER BOND FUND CLASS C
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> JUN-30-1999
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 180565404
<INVESTMENTS-AT-VALUE> 187853349
<RECEIVABLES> 5936402
<ASSETS-OTHER> 5582
<OTHER-ITEMS-ASSETS> 516
<TOTAL-ASSETS> 193795849
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1705631
<TOTAL-LIABILITIES> 1705631
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 188706765
<SHARES-COMMON-STOCK> 1414893
<SHARES-COMMON-PRIOR> 914450
<ACCUMULATED-NII-CURRENT> 93094
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 3997586
<ACCUM-APPREC-OR-DEPREC> 7287945
<NET-ASSETS> 192090218
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 6297045
<OTHER-INCOME> 0
<EXPENSES-NET> 1019908
<NET-INVESTMENT-INCOME> 5277137
<REALIZED-GAINS-CURRENT> 723220
<APPREC-INCREASE-CURRENT> 653877
<NET-CHANGE-FROM-OPS> 6654234
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 312965
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1416488
<NUMBER-OF-SHARES-REDEEMED> 929909
<SHARES-REINVESTED> 13864
<NET-CHANGE-IN-ASSETS> 38361684
<ACCUMULATED-NII-PRIOR> 15047
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 4720806
<GROSS-ADVISORY-FEES> 358045
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1046508
<AVERAGE-NET-ASSETS> 11552080
<PER-SHARE-NAV-BEGIN> 9.31
<PER-SHARE-NII> 0.26
<PER-SHARE-GAIN-APPREC> 0.09
<PER-SHARE-DIVIDEND> 0.26
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.40
<EXPENSE-RATIO> 1.69
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
