<PAGE> PAGE 1
000 B000000 12/31/98
000 C000000 0000785303
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0.a
000 J000000 U
001 A000000 JOHN HANCOCK VARIABLE SERIES TRUST I
001 B000000 811-04490
001 C000000 6175729196
002 A000000 200 CLARENDON STREET, P.O. BOX 111
002 B000000 BOSTON
002 C000000 MA
002 D010000 02117
002 D020000 0111
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 Y
007 B000000 23
007 C010100 1
007 C020100 LARGE CAP GROWTH
007 C030100 N
007 C010200 2
007 C020200 SOVEREIGN BOND
007 C030200 N
007 C010300 3
007 C020300 MONEY MARKET
007 C030300 N
007 C010400 4
007 C020400 GROWTH AND INCOME
007 C030400 N
007 C010500 5
007 C020500 MANAGED
007 C030500 N
007 C010600 6
007 C020600 INTERNATIONAL EQUITY INDEX
007 C030600 N
007 C010700 7
007 C020700 REAL ESTATE EQUITY
007 C030700 N
007 C010800 8
007 C020800 DIVERSIFIED MID CAP GROWTH
007 C030800 N
007 C010900 9
007 C020900 SHORT-TERM BOND
007 C030900 N
007 C011000 10
<PAGE> PAGE 2
007 C021000 SMALL CAP GROWTH
007 C031000 N
007 C011100 11
007 C021100 INTERNATIONAL BALANCED
007 C031100 N
007 C011200 12
007 C021200 MID CAP GROWTH
007 C031200 N
007 C011300 13
007 C021300 LARGE CAP VALUE
007 C031300 N
007 C011400 14
007 C021400 MID CAP VALUE
007 C031400 N
007 C011500 15
007 C021500 SMALL CAP VALUE
007 C031500 N
007 C011600 16
007 C021600 INTERNATIONAL OPPORTUNITIES
007 C031600 N
007 C011700 17
007 C021700 EQUITY INDEX
007 C031700 N
007 C011800 18
007 C021800 STRATEGIC BOND
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007 C011900 19
007 C021900 EMERGING MARKETS EQUITY
007 C031900 N
007 C012000 20
007 C022000 GLOBAL EQUITY
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007 C012100 21
007 C022100 BOND INDEX
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007 C012200 22
007 C022200 SMALL/MID CAP CORE
007 C032200 N
007 C012300 23
007 C022300 HIGH YIELD BOND
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007 C012400 24
007 C012500 25
007 C012600 26
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011 C01AA01 BOSTON
<PAGE> PAGE 3
011 C02AA01 MA
011 C03AA01 02117
011 C04AA01 0021
015 A00AA01 STATE STREET BANK & TRUST COMPANY
015 B00AA01 C
015 C01AA01 BOSTON
015 C02AA01 MA
015 C03AA01 02110
015 E01AA01 X
015 A00AA02 CAJA DE VALORES S.A.
015 B00AA02 S
015 C01AA02 BUENOS AIRES
015 D01AA02 ARGENTINA
015 E04AA02 X
015 A00AA03 AUSTRACLEAR LIMITED
015 B00AA03 S
015 C01AA03 SYDNEY
015 D01AA03 AUSTRALIA
015 E04AA03 X
015 A00AA04 RESERVE BANK INFO & TRANSFER SYSTEM
015 B00AA04 S
015 C01AA04 SYDNEY
015 D01AA04 AUSTRALIA
015 E04AA04 X
015 A00AA05 OESTERREICHISCHE KONTROLLBANK
015 B00AA05 S
015 C01AA05 VIENNA
015 D01AA05 AUSTRIA
015 E04AA05 X
015 A00AA06 BANQUE NATIONALE BELIGIQUE
015 B00AA06 S
015 C01AA06 BRUSSELS
015 D01AA06 BELGIUM
015 E04AA06 X
015 A00AA07 CAISSE INTERPROFESSIONNELLE DE DEPOT
015 B00AA07 S
015 C01AA07 BRUSSELS
015 D01AA07 BELGIUM
015 E04AA07 X
015 A00AA08 CAIXA DE LIQUIDACO DE SAO PAULO
015 B00AA08 S
015 C01AA08 SAO PAULO
015 D01AA08 BRAZIL
015 E04AA08 X
015 A00AA09 BULGARIAN NATIONAL BANK
015 B00AA09 S
015 C01AA09 BULGARIA
015 D01AA09 BULGARIA
015 E04AA09 X
015 A00AA10 CENTRAL DEPOSITORY AD
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<PAGE> PAGE 4
015 C01AA10 BULGARIA
015 D01AA10 BULGARIA
015 E04AA10 X
015 A00AA11 CANADIAN DEPOSITORY FOR SECURITIES
015 B00AA11 S
015 C01AA11 TORONTO
015 D01AA11 CANADA
015 E04AA11 X
015 A00AA12 SHANGHAI SECURITIES CLEARING CORP.
015 B00AA12 S
015 C01AA12 SHANGHAI
015 D01AA12 CHINA
015 E04AA12 X
015 A00AA13 SHENZHEN SECURITIES CLEARING CORP.
015 B00AA13 S
015 C01AA13 SHANGHAI
015 D01AA13 CHINA
015 E04AA13 X
015 A00AA14 MINISTRY OF FINANCE
015 B00AA14 S
015 C01AA14 CROATIA
015 D01AA14 CROATIA
015 E04AA14 X
015 A00AA15 NATIONAL BANK OF CROATIA
015 B00AA15 S
015 C01AA15 CROATIA
015 D01AA15 CROATIA
015 E04AA15 X
015 A00AA16 CZECH NATIONAL BANK
015 B00AA16 S
015 C01AA16 PRAGUE
015 D01AA16 CZECH REPUBLIC
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015 A00AA17 STREDISKO CENNYCH PAPIRU
015 B00AA17 S
015 C01AA17 PRAGUE
015 D01AA17 CZECH REPUBLIC
015 E04AA17 X
015 A00AA18 VAERDIPAPIRCENTRALEN
015 B00AA18 S
015 C01AA18 COPENHAGEN
015 D01AA18 DENMARK
015 E04AA18 X
015 A00AA19 MISR CO. FOR CLEARING, SETTLEMENT
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015 C01AA19 EGYPT
015 D01AA19 EGYPT
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015 A00AA20 EESTI VAARTPABERITE KESKDEPOSITOORIUM
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015 C01AA20 ESTONIA
<PAGE> PAGE 5
015 D01AA20 ESTONIA
015 E04AA20 X
015 A00AA21 SUOMEN ARVOPAPERIKESKUS
015 B00AA21 S
015 C01AA21 HELSINKI
015 D01AA21 FINLAND
015 E04AA21 X
015 A00AA22 SICOVAM
015 B00AA22 S
015 C01AA22 PARIS
015 D01AA22 FRANCE
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015 A00AA23 DEUTSCHE BORSE CLEARING AG
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015 C01AA23 FRANKFURT
015 D01AA23 GERMANY
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015 A00AA24 APOTHETIRION TITON AE
015 B00AA24 S
015 C01AA24 ATHENS
015 D01AA24 GREECE
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015 A00AA25 CENTRAL CLEARING AND SETTLEMENT SYSTEM
015 B00AA25 S
015 C01AA25 HONG KONG
015 D01AA25 CHINA
015 E04AA25 X
015 A00AA26 CENTRAL MONEYMARKETS UNIT
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015 C01AA26 HONG KONG
015 D01AA26 CHINA
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015 A00AA27 KOZPONTI ELSZAMOLOHAZ ES ERTEKTAR
015 B00AA27 S
015 C01AA27 BUDAPEST
015 D01AA27 HUNGARY
015 E04AA27 X
015 A00AA28 NATIONAL SECURITIES DEPOSITORY LTD
015 B00AA28 S
015 C01AA28 NEW DELHI
015 D01AA28 INDIA
015 E04AA28 X
015 A00AA29 BANK INDONESIA
015 B00AA29 S
015 C01AA29 INDONESIA
015 D01AA29 INDONESIA
015 E04AA29 X
015 A00AA30 CENTRAL BANK OF IRELAND SECURITIES
015 B00AA30 S
015 C01AA30 DUBLIN
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<PAGE> PAGE 6
015 E04AA30 X
015 A00AA31 BANK OF ISRAEL
015 B00AA31 S
015 C01AA31 TEL AVIV
015 D01AA31 ISRAEL
015 E04AA31 X
015 A00AA32 TEL AVIV STOCK EXCHANGE CLEARING HOUSE
015 B00AA32 S
015 C01AA32 TEL AVIV
015 D01AA32 ISRAEL
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015 A00AA33 BANCA D'ITALIA
015 B00AA33 S
015 C01AA33 MILAN
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015 A00AA34 MONTE TITOLI S.P.A.
015 B00AA34 S
015 C01AA34 MILAN
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015 A00AA35 JAMAICAN CENTRAL SECURITIES DEPOSITORY
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015 C01AA35 MONTEGO BAY
015 D01AA35 JAMAICA
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015 A00AA36 BANK OF JAPAN NET SYSTEM
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015 C01AA36 TOKYO
015 D01AA36 JAPAN
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015 A00AA37 KOREA SECURITIES DEPOSITORY CORP.
015 B00AA37 S
015 C01AA37 SEOUL
015 D01AA37 KOREA
015 E04AA37 X
015 A00AA38 LATVIAN CENTRAL DEPOSITORY
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015 C01AA38 LATVIA
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015 A00AA39 BANQUE DU LIBAN
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015 C01AA39 LEBANON
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015 A00AA40 CUSTODIAN/CLEARING CENTER
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<PAGE> PAGE 7
015 A00AA41 LIETUVOS CENTRINIS VERTYBINIV
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015 C01AA41 LITHUANIA
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015 A00AA43 SCRIPLESS SECURITIES
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015 D01AA43 MALAYSIA
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015 A00AA44 CENTRAL DEPOSITORY
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015 C01AA44 MAURITIUS
015 D01AA44 MAURITIUS
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015 A00AA45 INSITUTO PARA EL DEPOSITO
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015 E04AA45 X
015 A00AA46 MAROCLEAR
015 B00AA46 S
015 C01AA46 CASABLANCA
015 D01AA46 MOROCCO
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015 A00AA47 NEDERLANDS CENTRAAL INSTITUUT
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015 C01AA47 AMSTERDAM
015 D01AA47 NETHERLANDS
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015 A00AA48 DE NEDERLANDSCHE BANK N.V.
015 B00AA48 S
015 C01AA48 AMSTERDAM
015 D01AA48 NETHERLANDS
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015 A00AA49 NEW ZEALAND CENTRAL DEPOSITORS LTD
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015 C01AA49 AMSTERDAM
015 D01AA49 NEW ZEALAND
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015 A00AA50 VERDIPAPIRSENTRALEN
015 B00AA50 S
015 C01AA50 OLSO
015 D01AA50 NORWAY
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015 A00AA51 MUSCAT SECURITIES MARKET
<PAGE> PAGE 8
015 B00AA51 S
015 C01AA51 OMAN
015 D01AA51 OMAN
015 E04AA51 X
015 A00AA52 CENTRAL DEPOSITORY CO. OF PAKISTAN LTD
015 B00AA52 S
015 C01AA52 PAKISTAN
015 D01AA52 PAKISTAN
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015 A00AA53 CAJA DE VALORES Y LIQUIDACIONES S.A.
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015 C01AA53 LIMA
015 D01AA53 PERU
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015 A00AA54 REGISTRY OF SCRIPLESS SECURITIES
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015 C01AA54 PHILIPPINES
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015 C01AA55 PHILIPINES
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015 A00AA56 CENTRALNY REJESTER BONOW
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015 C01AA56 WARSAW
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015 A00AA57 KRAJOWNY DEPOZT
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<PAGE> PAGE 9
015 C01AA61 SINGAPORE
015 D01AA61 SINAGPORE
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015 A00AA62 MONETARY AUTHORITY OF SINGAPORE
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015 A00AA64 STREDISKO CENNYCH PAPIEROV
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015 A00AA65 KLIRINSKO DEPOTNA DRUZBA D.D.
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015 A00AA67 BANCO DE ESPANA
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015 C01AA69 SRI LANKA
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015 A00AA70 VARDEPAPPERSCENTRALEN AB
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015 C01AA70 STOCKHOLM
015 D01AA70 SWEDEM
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015 A00AA71 SCHWEIZERISCHE EFFEKTEN -GIRO AG
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<PAGE> PAGE 10
015 D01AA71 SWITZERLAND
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015 A00AA72 TAIWAN SECURITIES CENTRAL DEPOSITORY
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015 C01AA72 TAIWAN
015 D01AA72 CHINA
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015 A00AA73 THAILAND SECURITIES DEPOSITORY
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015 C01AA73 BANGKOK
015 D01AA73 THAILAND
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015 A00AA74 SOCIETE TUNISIENNE INTERPROF.
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015 C01AA74 TUNISIA
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015 A00AA75 CENTRAL BANK OF TURKEY
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015 C01AA75 ISTANBUL
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015 A00AA76 CENTRAL GILTS OFFICE/CENTRAL MMKT OFFICE
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015 C01AA76 LONDON
015 D01AA76 UNITED KINGDOM
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<PAGE> PAGE 11
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020 A000008 CS FIRST BOSTON CORP.
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022 C000002 3513273
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022 C000003 2853278
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<PAGE> PAGE 12
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<PAGE> PAGE 13
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<PAGE> PAGE 14
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<PAGE> PAGE 15
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<PAGE> PAGE 16
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<PAGE> PAGE 17
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<PAGE> PAGE 18
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<PAGE> PAGE 27
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<PAGE> PAGE 29
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<PAGE> PAGE 30
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<PAGE> PAGE 37
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<PAGE> PAGE 38
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008 B000801 A
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<PAGE> PAGE 39
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<PAGE> PAGE 40
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<PAGE> PAGE 41
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<PAGE> PAGE 42
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<PAGE> PAGE 43
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<PAGE> PAGE 44
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008 A001001 JOHN HANCOCK MUTUAL LIFE INSURANCE COMPANY
008 B001001 A
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008 A001002 JOHN HANCOCK ADVISERS, INC.
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<PAGE> PAGE 45
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<PAGE> PAGE 46
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<PAGE> PAGE 47
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008 A001101 JOHN HANCOCK MUTUAL LIFE INSURANCE COMPANY
008 B001101 A
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<PAGE> PAGE 48
008 D011101 BOSTON
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<PAGE> PAGE 49
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070 A011100 Y
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<PAGE> PAGE 50
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<PAGE> PAGE 51
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008 A001201 JOHN HANCOCK MUTUAL LIFE INSURANCE COMPANY
008 B001201 A
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<PAGE> PAGE 52
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<PAGE> PAGE 53
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<PAGE> PAGE 54
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<PAGE> PAGE 55
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008 A001301 JOHN HANCOCK MUTUAL LIFE INSURANCE COMPANY
008 B001301 A
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<PAGE> PAGE 56
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<PAGE> PAGE 57
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<PAGE> PAGE 58
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<PAGE> PAGE 60
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<PAGE> PAGE 61
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<PAGE> PAGE 63
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<PAGE> PAGE 64
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<PAGE> PAGE 65
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<PAGE> PAGE 66
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<PAGE> PAGE 67
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<PAGE> PAGE 68
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<PAGE> PAGE 69
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<PAGE> PAGE 70
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<PAGE> PAGE 71
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<PAGE> PAGE 72
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<PAGE> PAGE 73
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<PAGE> PAGE 75
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008 A001901 JOHN HANCOCK MUTUAL LIFE INSURANCE COMPANY
008 B001901 A
008 C001901 801-8352
008 D011901 BOSTON
008 D021901 MA
008 D031901 02117
008 D041901 0111
008 A001902 MONTGOMERY ASSET MANAGEMENT LLC
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008 D021902 CA
008 D031902 94111
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<PAGE> PAGE 77
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<PAGE> PAGE 78
062 C001900 0.0
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070 A011900 Y
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070 B011900 N
070 B021900 N
070 C011900 Y
070 C021900 N
070 D011900 Y
070 D021900 N
070 E011900 Y
070 E021900 N
070 F011900 Y
070 F021900 N
070 G011900 Y
070 G021900 N
070 H011900 Y
070 H021900 N
070 I011900 Y
070 I021900 N
070 J011900 Y
070 J021900 N
070 K011900 Y
070 K021900 Y
070 L011900 Y
070 L021900 Y
070 M011900 Y
070 M021900 Y
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070 O011900 N
070 O021900 N
070 P011900 Y
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070 Q011900 N
070 Q021900 N
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<PAGE> PAGE 79
070 R021900 N
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<PAGE> PAGE 80
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008 A002001 JOHN HANCOCK MUTUAL LIFE INSURANCE COMPANY
008 B002001 A
008 C002001 801-8352
008 D012001 BOSTON
008 D022001 MA
008 D032001 02117
008 A002002 SCUDDER KEMPER INVESTMENTS,INC.
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<PAGE> PAGE 81
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<PAGE> PAGE 82
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<PAGE> PAGE 83
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<PAGE> PAGE 84
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008 A002101 JOHN HANCOCK MUTUAL LIFE INSURANCE COMPANY
008 B002101 A
008 C002101 801-8352
008 D012101 BOSTON
008 D022101 MA
008 D032101 02117
008 A002102 MELLON BOND ASSOCIATES, LLP
008 B002102 S
008 C002102 801-50865
008 D012102 PITTSBURGH
008 D022102 PA
008 D032102 15258
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<PAGE> PAGE 85
028 G012100 1190
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<PAGE> PAGE 86
064 A002100 N
064 B002100 N
070 A012100 Y
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070 F022100 N
070 G012100 N
070 G022100 N
070 H012100 N
070 H022100 N
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070 J022100 N
070 K012100 Y
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070 L022100 Y
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<PAGE> PAGE 87
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<PAGE> PAGE 88
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008 A002201 JOHN HANCOCK MUTUAL LIFE INSURANCE COMPANY
008 B002201 A
008 C002201 801-8352
008 D012201 BOSTON
008 D022201 MA
008 D032201 02117
008 D042201 0111
008 A002202 GOLDMAN SACHS MANAGEMENT
008 B002202 S
008 C002202 801-3111
008 D012202 NEW YORK
008 D022202 NY
008 D032202 10004
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<PAGE> PAGE 89
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<PAGE> PAGE 90
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<PAGE> PAGE 91
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<PAGE> PAGE 92
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008 A002301 JOHN HANCOCK MUTUAL LIFE INSURANCE COMPANY
008 B002301 A
008 C002301 801-8352
008 D012301 BOSTON
008 D022301 MA
008 D032301 02117
008 D042301 0111
008 A002302 WELLINGTON MANAGEMENT COMPANY LLP
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008 D032302 02109
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<PAGE> PAGE 93
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<PAGE> PAGE 94
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<PAGE> PAGE 95
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SIGNATURE SANDRA M. DADALT
TITLE ASSISTANT SECRETARY
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE JOHN
HANCOCK VARIABLE SERIES TRUST I ANNUAL REPORT DATED DECEMBER 31, 1998 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER> 01
<NAME> LARGE CAP GROWTH
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-START> JAN-01-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 771,576
<INVESTMENTS-AT-VALUE> 1,130,641
<RECEIVABLES> 4,809
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1,135,450
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<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 147
<TOTAL-LIABILITIES> 8,686
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 777,691
<SHARES-COMMON-STOCK> 43,016
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> (38)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (1,050)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 350,085
<NET-ASSETS> 1,126,764
<DIVIDEND-INCOME> 8,574
<INTEREST-INCOME> 547
<OTHER-INCOME> 0
<EXPENSES-NET> 3,765
<NET-INVESTMENT-INCOME> 5,356
<REALIZED-GAINS-CURRENT> 104,660
<APPREC-INCREASE-CURRENT> 198,191
<NET-CHANGE-FROM-OPS> 308,207
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (5,356)
<DISTRIBUTIONS-OF-GAINS> (104,621)
<DISTRIBUTIONS-OTHER> (39)
<NUMBER-OF-SHARES-SOLD> 5,424
<NUMBER-OF-SHARES-REDEEMED> (2,861)
<SHARES-REINVESTED> 4,217
<NET-CHANGE-IN-ASSETS> 372,366
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 3,446
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 3,765
<AVERAGE-NET-ASSETS> 914,150
<PER-SHARE-NAV-BEGIN> 20.82
<PER-SHARE-NII> 0.14
<PER-SHARE-GAIN-APPREC> 8.05
<PER-SHARE-DIVIDEND> (0.14)
<PER-SHARE-DISTRIBUTIONS> (2.68)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 26.19
<EXPENSE-RATIO> 0.41
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE JOHN
HANCOCK VARIABLE SERIES TRUST I ANNUAL REPORT DATED DECEMBER 31, 1998 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER> 02
<NAME> SOVEREIGN BOD
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-START> JAN-01-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 851,738
<INVESTMENTS-AT-VALUE> 891,650
<RECEIVABLES> 19,541
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 911,191
<PAYABLE-FOR-SECURITIES> 3,856
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 214
<TOTAL-LIABILITIES> 4,070
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 882,112
<SHARES-COMMON-STOCK> 91,429
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 178
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 3,988
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 20,843
<NET-ASSETS> 907,121
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 60,699
<OTHER-INCOME> 0
<EXPENSES-NET> 2,459
<NET-INVESTMENT-INCOME> 58,240
<REALIZED-GAINS-CURRENT> 12,121
<APPREC-INCREASE-CURRENT> (3,300)
<NET-CHANGE-FROM-OPS> 67,061
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (58,240)
<DISTRIBUTIONS-OF-GAINS> (12,168)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 12,001
<NUMBER-OF-SHARES-REDEEMED> (8,405)
<SHARES-REINVESTED> 7,044
<NET-CHANGE-IN-ASSETS> 103,351
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 2,128
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 2,459
<AVERAGE-NET-ASSETS> 851,016
<PER-SHARE-NAV-BEGIN> 9.95
<PER-SHARE-NII> 0.69
<PER-SHARE-GAIN-APPREC> 0.11
<PER-SHARE-DIVIDEND> (0.69)
<PER-SHARE-DISTRIBUTIONS> (0.14)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.92
<EXPENSE-RATIO> 0.29
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE JOHN
HANCOCK VARIABLE SERIES TRUST I ANNUAL REPORT DATED DECEMBER 31, 1998 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER> 03
<NAME> MONEY MARKET
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-START> JAN-01-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 370,722
<INVESTMENTS-AT-VALUE> 370,722
<RECEIVABLES> 24,540
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 395,262
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 67
<TOTAL-LIABILITIES> 67
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 395,195
<SHARES-COMMON-STOCK> 39,519
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 395,195
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 16,754
<OTHER-INCOME> 0
<EXPENSES-NET> 916
<NET-INVESTMENT-INCOME> 15,838
<REALIZED-GAINS-CURRENT> 0
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 15,838
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (15,838)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 38,622
<NUMBER-OF-SHARES-REDEEMED> (23,631)
<SHARES-REINVESTED> 1,584
<NET-CHANGE-IN-ASSETS> 165,752
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 749
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 916
<AVERAGE-NET-ASSETS> 299,376
<PER-SHARE-NAV-BEGIN> 10.00
<PER-SHARE-NII> 0.53
<PER-SHARE-GAIN-APPREC> 0
<PER-SHARE-DIVIDEND> (0.53)
<PER-SHARE-DISTRIBUTIONS> 00.00
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.00
<EXPENSE-RATIO> 0.31
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE JOHN
HANCOCK VARIABLE SERIES TRUST I ANNUAL REPORT DATED DECEMBER 31, 1998 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER> 04
<NAME> GROWTH & INCOME
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-START> JAN-01-1998
<PERIOD-END> DEC-01-1998
<INVESTMENTS-AT-COST> 2,538,433
<INVESTMENTS-AT-VALUE> 3,672,104
<RECEIVABLES> 4,023
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 3,676,127
<PAYABLE-FOR-SECURITIES> 4,856
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 486
<TOTAL-LIABILITIES> 5,342
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 2,550,367
<SHARES-COMMON-STOCK> 188,319
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 1,482
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (362)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 1,119,298
<NET-ASSETS> 3,670,785
<DIVIDEND-INCOME> 46,457
<INTEREST-INCOME> 1,695
<OTHER-INCOME> 0
<EXPENSES-NET> 8,747
<NET-INVESTMENT-INCOME> 39,405
<REALIZED-GAINS-CURRENT> 320,993
<APPREC-INCREASE-CURRENT> 486,604
<NET-CHANGE-FROM-OPS> 847,002
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (39,405)
<DISTRIBUTIONS-OF-GAINS> (320,993)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 14,254
<NUMBER-OF-SHARES-REDEEMED> (12,305)
<SHARES-REINVESTED> 18,579
<NET-CHANGE-IN-ASSETS> 884,821
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 7,960
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 8,747
<AVERAGE-NET-ASSETS> 3,184,087
<PER-SHARE-NAV-BEGIN> 16.61
<PER-SHARE-NII> 0.23
<PER-SHARE-GAIN-APPREC> 4.75
<PER-SHARE-DIVIDEND> (0.23)
<PER-SHARE-DISTRIBUTIONS> (1.87)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 19.49
<EXPENSE-RATIO> 0.27
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE JOHN
HANCOCK VARIABLE SERIES TRUST I ANNUAL REPORT DATED DECEMBER 31, 1998 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER> 05
<NAME> MANAGED
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-START> JAN-01-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 2,662,717
<INVESTMENTS-AT-VALUE> 3,466,578
<RECEIVABLES> 142,798
<ASSETS-OTHER> 2,197
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 3,611,573
<PAYABLE-FOR-SECURITIES> 304,113
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 5,550
<TOTAL-LIABILITIES> 309,663
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 2,698,050
<SHARES-COMMON-STOCK> 211,171
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 4,698
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (3,020)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 606,741
<NET-ASSETS> 3,301,910
<DIVIDEND-INCOME> 27,279
<INTEREST-INCOME> 74,000
<OTHER-INCOME> 0
<EXPENSES-NET> 10,967
<NET-INVESTMENT-INCOME> 90,312
<REALIZED-GAINS-CURRENT> 215,053
<APPREC-INCREASE-CURRENT> 256,886
<NET-CHANGE-FROM-OPS> 562,251
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (90,312)
<DISTRIBUTIONS-OF-GAINS> (212,457)
<DISTRIBUTIONS-OTHER> (10,444)
<NUMBER-OF-SHARES-SOLD> 12,059
<NUMBER-OF-SHARES-REDEEMED> (16,174)
<SHARES-REINVESTED> 20,147
<NET-CHANGE-IN-ASSETS> 501,783
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 9,826
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 10,967
<AVERAGE-NET-ASSETS> 3,025,277
<PER-SHARE-NAV-BEGIN> 14.35
<PER-SHARE-NII> 0.46
<PER-SHARE-GAIN-APPREC> 2.43
<PER-SHARE-DIVIDEND> (0.46)
<PER-SHARE-DISTRIBUTIONS> (1.09)
<RETURNS-OF-CAPITAL> (0.05)
<PER-SHARE-NAV-END> 15.64
<EXPENSE-RATIO> 0.36
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE JOHN
HANCOCK VARIABLE SERIES TRUST I ANNUAL REPORT DATED DECEMBER 31, 1998 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER> 06
<NAME> INTERNATIONAL EQUITY INDEX
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-START> JAN-01-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 162,862
<INVESTMENTS-AT-VALUE> 172,782
<RECEIVABLES> 406
<ASSETS-OTHER> 8
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 173,196
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 59
<TOTAL-LIABILITIES> 59
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 165,702
<SHARES-COMMON-STOCK> 11,127
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> (173)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 108
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 7,518
<NET-ASSETS> 173,137
<DIVIDEND-INCOME> 2,984
<INTEREST-INCOME> 283
<OTHER-INCOME> 0
<EXPENSES-NET> 908
<NET-INVESTMENT-INCOME> 2,359
<REALIZED-GAINS-CURRENT> 24,001
<APPREC-INCREASE-CURRENT> 4,290
<NET-CHANGE-FROM-OPS> 30,650
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (2,321)
<DISTRIBUTIONS-OF-GAINS> (24,366)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,470
<NUMBER-OF-SHARES-REDEEMED> (2,070)
<SHARES-REINVESTED> 1,703
<NET-CHANGE-IN-ASSETS> 20,778
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 504
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,032
<AVERAGE-NET-ASSETS> 163,862
<PER-SHARE-NAV-BEGIN> 15.20
<PER-SHARE-NII> 0.23
<PER-SHARE-GAIN-APPREC> 2.91
<PER-SHARE-DIVIDEND> (0.23)
<PER-SHARE-DISTRIBUTIONS> (2.55)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 15.56
<EXPENSE-RATIO> 0.56
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE JOHN
HANCOCK VARIABLE SERIES TRUST I ANNUAL REPORT DATED DECEMBER 31, 1998 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER> 07
<NAME> REAL ESTATE EQUITY
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-START> JAN-01-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 149,365
<INVESTMENTS-AT-VALUE> 151,908
<RECEIVABLES> 1,170
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 153,078
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 289
<TOTAL-LIABILITIES> 289
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 149,582
<SHARES-COMMON-STOCK> 12,263
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 2,108
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (180)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 1,279
<NET-ASSETS> 152,789
<DIVIDEND-INCOME> 10,843
<INTEREST-INCOME> 173
<OTHER-INCOME> 0
<EXPENSES-NET> 1,229
<NET-INVESTMENT-INCOME> 9,787
<REALIZED-GAINS-CURRENT> 1,614
<APPREC-INCREASE-CURRENT> (44,965)
<NET-CHANGE-FROM-OPS> (33,564)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (8,848)
<DISTRIBUTIONS-OF-GAINS> (1,695)
<DISTRIBUTIONS-OTHER> (58)
<NUMBER-OF-SHARES-SOLD> 1,549
<NUMBER-OF-SHARES-REDEEMED> 2,894
<SHARES-REINVESTED> 778
<NET-CHANGE-IN-ASSETS> (51,342)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1,071
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,229
<AVERAGE-NET-ASSETS> 178,542
<PER-SHARE-NAV-BEGIN> 15.91
<PER-SHARE-NII> 0.77
<PER-SHARE-GAIN-APPREC> (3.38)
<PER-SHARE-DIVIDEND> (0.70)
<PER-SHARE-DISTRIBUTIONS> (0.14)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 12.46
<EXPENSE-RATIO> 0.69
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE JOHN
HANCOCK VARIABLE SERIES TRUST I ANNUAL REPORT DATED DECEMBER 31, 1998 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER> 08
<NAME> DIVERSIFIED MID CAP GROWTH
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-START> JAN-01-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 166,644
<INVESTMENTS-AT-VALUE> 194,444
<RECEIVABLES> 771
<ASSETS-OTHER> 1
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 195,216
<PAYABLE-FOR-SECURITIES> 1,752
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 132
<TOTAL-LIABILITIES> 1,884
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 170,700
<SHARES-COMMON-STOCK> 12,129
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (290)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 22,922
<NET-ASSETS> 193,332
<DIVIDEND-INCOME> 1,150
<INTEREST-INCOME> 393
<OTHER-INCOME> 0
<EXPENSES-NET> 1,760
<NET-INVESTMENT-INCOME> (217)
<REALIZED-GAINS-CURRENT> 2,111
<APPREC-INCREASE-CURRENT> 8,644
<NET-CHANGE-FROM-OPS> 10,538
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> (3,671)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,216
<NUMBER-OF-SHARES-REDEEMED> (3,201)
<SHARES-REINVESTED> 230
<NET-CHANGE-IN-ASSETS> (20,280)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1,490
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,760
<AVERAGE-NET-ASSETS> 198,741
<PER-SHARE-NAV-BEGIN> 15.39
<PER-SHARE-NII> (0.02)
<PER-SHARE-GAIN-APPREC> 0.88
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (0.31)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 15.94
<EXPENSE-RATIO> 0.89
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE JOHN
HANCOCK VARIABLE SERIES TRUST I ANNUAL REPORT DATED DECEMBER 31, 1998 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER> 09
<NAME> SHORT TERM BOND
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-START> JAN-01-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 73,522
<INVESTMENTS-AT-VALUE> 76,028
<RECEIVABLES> 1,218
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 77,246
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 52
<TOTAL-LIABILITIES> 52
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 77,623
<SHARES-COMMON-STOCK> 7,682
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 87
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (208)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (308)
<NET-ASSETS> 77,194
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 4,306
<OTHER-INCOME> 0
<EXPENSES-NET> 341
<NET-INVESTMENT-INCOME> 3,965
<REALIZED-GAINS-CURRENT> (82)
<APPREC-INCREASE-CURRENT> (325)
<NET-CHANGE-FROM-OPS> 3,558
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (3,946)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 4,790
<NUMBER-OF-SHARES-REDEEMED> (2,568)
<SHARES-REINVESTED> 390
<NET-CHANGE-IN-ASSETS> 26,074
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 193
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 341
<AVERAGE-NET-ASSETS> 64,228
<PER-SHARE-NAV-BEGIN> 10.08
<PER-SHARE-NII> 0.61
<PER-SHARE-GAIN-APPREC> (0.03)
<PER-SHARE-DIVIDEND> (0.61)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.05
<EXPENSE-RATIO> 0.53
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE JOHN
HANCOCK VARIABLE SERIES TRUST I ANNUAL REPORT DATED DECEMBER 31, 1998 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER> 10
<NAME> SMALL CAP GROWTH
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-START> JAN-01-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 55,256
<INVESTMENTS-AT-VALUE> 74,839
<RECEIVABLES> 2,695
<ASSETS-OTHER> 46
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 77,580
<PAYABLE-FOR-SECURITIES> 2,710
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 21
<TOTAL-LIABILITIES> 2,731
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 61,011
<SHARES-COMMON-STOCK> 5,763
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 4
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (3045)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 16,879
<NET-ASSETS> 74,849
<DIVIDEND-INCOME> 104
<INTEREST-INCOME> 94
<OTHER-INCOME> 0
<EXPENSES-NET> 561
<NET-INVESTMENT-INCOME> (363)
<REALIZED-GAINS-CURRENT> (271)
<APPREC-INCREASE-CURRENT> 10,212
<NET-CHANGE-FROM-OPS> 9,578
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2,779
<NUMBER-OF-SHARES-REDEEMED> (1,314)
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 26,088
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 421
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 588
<AVERAGE-NET-ASSETS> 56,060
<PER-SHARE-NAV-BEGIN> 11.34
<PER-SHARE-NII> (0.05)
<PER-SHARE-GAIN-APPREC> 1.70
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 12.99
<EXPENSE-RATIO> 1.00
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE JOHN
HANCOCK VARIABLE SERIES TRUST I ANNUAL REPORT DATED DECEMBER 31, 1998 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER> 11
<NAME> INTERNATIONAL BALANCED
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-START> JAN-01-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 25,786
<INVESTMENTS-AT-VALUE> 29,275
<RECEIVABLES> 870
<ASSETS-OTHER> 319
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 30,464
<PAYABLE-FOR-SECURITIES> 43
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 5
<TOTAL-LIABILITIES> 48
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 27,679
<SHARES-COMMON-STOCK> 2,734
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> (829)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 237
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 2,791
<NET-ASSETS> 30,416
<DIVIDEND-INCOME> 333
<INTEREST-INCOME> 859
<OTHER-INCOME> 0
<EXPENSES-NET> 305
<NET-INVESTMENT-INCOME> 887
<REALIZED-GAINS-CURRENT> 609
<APPREC-INCREASE-CURRENT> 3,072
<NET-CHANGE-FROM-OPS> 4,568
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (887)
<DISTRIBUTIONS-OF-GAINS> (1,103)
<DISTRIBUTIONS-OTHER> (24)
<NUMBER-OF-SHARES-SOLD> 581
<NUMBER-OF-SHARES-REDEEMED> (545)
<SHARES-REINVESTED> 184
<NET-CHANGE-IN-ASSETS> 4,996
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 236
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 504
<AVERAGE-NET-ASSETS> 27,707
<PER-SHARE-NAV-BEGIN> 10.11
<PER-SHARE-NII> 0.34
<PER-SHARE-GAIN-APPREC> 1.44
<PER-SHARE-DIVIDEND> (0.34)
<PER-SHARE-DISTRIBUTIONS> (0.42)
<RETURNS-OF-CAPITAL> (0.01)
<PER-SHARE-NAV-END> 11.12
<EXPENSE-RATIO> 1.10
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE JOHN
HANCOCK VARIABLE SERIES TRUST I ANNUAL REPORT DATED DECEMBER 31, 1998 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER> 12
<NAME> MID CAP GROWTH
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-START> JAN-01-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 68,410
<INVESTMENTS-AT-VALUE> 92,304
<RECEIVABLES> 3,127
<ASSETS-OTHER> 533
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 95,964
<PAYABLE-FOR-SECURITIES> 1,862
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 17
<TOTAL-LIABILITIES> 1,879
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 72,467
<SHARES-COMMON-STOCK> 6,224
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> (69)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (141)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 21,795
<NET-ASSETS> 94,085
<DIVIDEND-INCOME> 134
<INTEREST-INCOME> 138
<OTHER-INCOME> 0
<EXPENSES-NET> 655
<NET-INVESTMENT-INCOME> (383)
<REALIZED-GAINS-CURRENT> 8,102
<APPREC-INCREASE-CURRENT> 15,616
<NET-CHANGE-FROM-OPS> 23,335
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> (7,468)
<DISTRIBUTIONS-OTHER> (833)
<NUMBER-OF-SHARES-SOLD> 3,075
<NUMBER-OF-SHARES-REDEEMED> (774)
<SHARES-REINVESTED> 549
<NET-CHANGE-IN-ASSETS> 83,850
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 507
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 670
<AVERAGE-NET-ASSETS> 59,636
<PER-SHARE-NAV-BEGIN> 11.93
<PER-SHARE-NII> (0.09)
<PER-SHARE-GAIN-APPREC> 4.75
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (1.32)
<RETURNS-OF-CAPITAL> (0.15)
<PER-SHARE-NAV-END> 15.12
<EXPENSE-RATIO> 1.10
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE JOHN
HANCOCK VARIABLE SERIES TRUST I ANNUAL REPORT DATED DECEMBER 31, 1998 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER> 13
<NAME> LARGE CAP VALUE
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-START> JAN-01-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 106,130
<INVESTMENTS-AT-VALUE> 123,254
<RECEIVABLES> 270
<ASSETS-OTHER> 1
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 123,525
<PAYABLE-FOR-SECURITIES> 151
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 9
<TOTAL-LIABILITIES> 160
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 111,673
<SHARES-COMMON-STOCK> 8,799
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 35
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (8)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 11,665
<NET-ASSETS> 123,365
<DIVIDEND-INCOME> 2,592
<INTEREST-INCOME> 399
<OTHER-INCOME> 0
<EXPENSES-NET> 920
<NET-INVESTMENT-INCOME> 2,071
<REALIZED-GAINS-CURRENT> 4,295
<APPREC-INCREASE-CURRENT> 2,592
<NET-CHANGE-FROM-OPS> 8,958
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (2,052)
<DISTRIBUTIONS-OF-GAINS> (4,289)
<DISTRIBUTIONS-OTHER> (21)
<NUMBER-OF-SHARES-SOLD> 3809
<NUMBER-OF-SHARES-REDEEMED> (864)
<SHARES-REINVESTED> 455
<NET-CHANGE-IN-ASSETS> 50,096
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 747
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 920
<AVERAGE-NET-ASSETS> 99,497
<PER-SHARE-NAV-BEGIN> 13.57
<PER-SHARE-NII> 0.28
<PER-SHARE-GAIN-APPREC> 0.96
<PER-SHARE-DIVIDEND> (0.28)
<PER-SHARE-DISTRIBUTIONS> (0.51)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 14.02
<EXPENSE-RATIO> 0.92
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE JOHN
HANCOCK VARIABLE SERIES TRUST I ANNUAL REPORT DATED DECEMBER 31, 1998 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER> 14
<NAME> MID CAP VALUE
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-START> JAN-01-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 94,039
<INVESTMENTS-AT-VALUE> 95,152
<RECEIVABLES> 367
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 95,519
<PAYABLE-FOR-SECURITIES> 688
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 11
<TOTAL-LIABILITIES> 699
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 104,944
<SHARES-COMMON-STOCK> 7,781
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (9,170)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (954)
<NET-ASSETS> 94,820
<DIVIDEND-INCOME> 1,368
<INTEREST-INCOME> 303
<OTHER-INCOME> 0
<EXPENSES-NET> 851
<NET-INVESTMENT-INCOME> 820
<REALIZED-GAINS-CURRENT> (8,690)
<APPREC-INCREASE-CURRENT> (4,194)
<NET-CHANGE-FROM-OPS> (12,064)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (820)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 4,722
<NUMBER-OF-SHARES-REDEEMED> (1,693)
<SHARES-REINVESTED> 66
<NET-CHANGE-IN-ASSETS> 29,847
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 709
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 851
<AVERAGE-NET-ASSETS> 88,520
<PER-SHARE-NAV-BEGIN> 13.87
<PER-SHARE-NII> 0.11
<PER-SHARE-GAIN-APPREC> (1.68)
<PER-SHARE-DIVIDEND> (0.11)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 12.19
<EXPENSE-RATIO> 0.96
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE JOHN
HANCOCK VARIABLE SERIES TRUST I ANNUAL REPORT DATED DECEMBER 31, 1998 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER> 15
<NAME> SMALL-CAP VALUE
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-START> JAN-01-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 60,464
<INVESTMENTS-AT-VALUE> 63,981
<RECEIVABLES> 126
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 64,107
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 12
<TOTAL-LIABILITIES> 12
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 66,361
<SHARES-COMMON-STOCK> 5,531
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 48
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (4,591)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 2,277
<NET-ASSETS> 64,095
<DIVIDEND-INCOME> 742
<INTEREST-INCOME> 195
<OTHER-INCOME> 0
<EXPENSES-NET> 585
<NET-INVESTMENT-INCOME> 352
<REALIZED-GAINS-CURRENT> (4,544)
<APPREC-INCREASE-CURRENT> 253
<NET-CHANGE-FROM-OPS> (3,939)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (352)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2,952
<NUMBER-OF-SHARES-REDEEMED> (940)
<SHARES-REINVESTED> 31
<NET-CHANGE-IN-ASSETS> 20,834
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 446
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 602
<AVERAGE-NET-ASSETS> 55,624
<PER-SHARE-NAV-BEGIN> 12.40
<PER-SHARE-NII> 0.07
<PER-SHARE-GAIN-APPREC> (0.81)
<PER-SHARE-DIVIDEND> (0.07)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 11.59
<EXPENSE-RATIO> 1.05
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE JOHN
HANCOCK VARIABLE SERIES TRUST I ANNUAL REPORT DATED DECEMBER 31, 1998 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER> 16
<NAME> INTERNATIONAL OPPORTUNITIES
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-START> JAN-01-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 54,893
<INVESTMENTS-AT-VALUE> 64,211
<RECEIVABLES> 78
<ASSETS-OTHER> 37
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 64,326
<PAYABLE-FOR-SECURITIES> 2
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 74
<TOTAL-LIABILITIES> 76
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 58,135
<SHARES-COMMON-STOCK> 5,260
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 52
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (392)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 6,453
<NET-ASSETS> 64,250
<DIVIDEND-INCOME> 854
<INTEREST-INCOME> 144
<OTHER-INCOME> 0
<EXPENSES-NET> 563
<NET-INVESTMENT-INCOME> 435
<REALIZED-GAINS-CURRENT> (303)
<APPREC-INCREASE-CURRENT> 6,191
<NET-CHANGE-FROM-OPS> 6,323
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (416)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 3,600
<NUMBER-OF-SHARES-REDEEMED> (1,258)
<SHARES-REINVESTED> 36
<NET-CHANGE-IN-ASSETS> 33,619
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 441
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 708
<AVERAGE-NET-ASSETS> 48,655
<PER-SHARE-NAV-BEGIN> 10.63
<PER-SHARE-NII> 0.11
<PER-SHARE-GAIN-APPREC> 1.57
<PER-SHARE-DIVIDEND> (0.10)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 12.21
<EXPENSE-RATIO> 1.16
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE JOHN
HANCOCK VARIABLE SERIES TRUST I ANNUAL REPORT DATED DECEMBER 31, 1998 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER> 17
<NAME> EQUITY INDEX
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-START> JAN-01-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 187,090
<INVESTMENTS-AT-VALUE> 233,336
<RECEIVABLES> 893
<ASSETS-OTHER> 68
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 234,297
<PAYABLE-FOR-SECURITIES> 1,719
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 0
<TOTAL-LIABILITIES> 1,719
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 186,595
<SHARES-COMMON-STOCK> 13,139
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 85
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (356)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 45,998
<NET-ASSETS> 232,578
<DIVIDEND-INCOME> 2,556
<INTEREST-INCOME> 11
<OTHER-INCOME> 0
<EXPENSES-NET> 0
<NET-INVESTMENT-INCOME> 2,567
<REALIZED-GAINS-CURRENT> 3,458
<APPREC-INCREASE-CURRENT> 34,583
<NET-CHANGE-FROM-OPS> 40,608
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (2,483)
<DISTRIBUTIONS-OF-GAINS> (3,661)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 7,345
<NUMBER-OF-SHARES-REDEEMED> (1,703)
<SHARES-REINVESTED> 363
<NET-CHANGE-IN-ASSETS> 131,188
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 271
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 543
<AVERAGE-NET-ASSETS> 161,057
<PER-SHARE-NAV-BEGIN> 14.21
<PER-SHARE-NII> 0.25
<PER-SHARE-GAIN-APPREC> 3.76
<PER-SHARE-DIVIDEND> (0.24)
<PER-SHARE-DISTRIBUTIONS> (0.28)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 17.70
<EXPENSE-RATIO> 0
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE JOHN
HANC0CK VARIABLE SERIES TRUST I ANNUAL REPORT DATED DECEMBER 31, 1998 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER> 18
<NAME> STRATEGIC BOND
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-START> JAN-01-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 60,144
<INVESTMENTS-AT-VALUE> 71,782
<RECEIVABLES> 5,853
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 77,635
<PAYABLE-FOR-SECURITIES> 10,824
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 20
<TOTAL-LIABILITIES> 10,844
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 64,192
<SHARES-COMMON-STOCK> 6,301
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> (147)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (1)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 2,593
<NET-ASSETS> 66,791
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 2,902
<OTHER-INCOME> 0
<EXPENSES-NET> 446
<NET-INVESTMENT-INCOME> 2,456
<REALIZED-GAINS-CURRENT> (559)
<APPREC-INCREASE-CURRENT> 2,193
<NET-CHANGE-FROM-OPS> 4,090
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (1,387)
<DISTRIBUTIONS-OF-GAINS> (534)
<DISTRIBUTIONS-OTHER> (891)
<NUMBER-OF-SHARES-SOLD> 4,340
<NUMBER-OF-SHARES-REDEEMED> (1,102)
<SHARES-REINVESTED> 266
<NET-CHANGE-IN-ASSETS> 38,144
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 329
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 477
<AVERAGE-NET-ASSETS> 46,643
<PER-SHARE-NAV-BEGIN> 10.24
<PER-SHARE-NII> 0.54
<PER-SHARE-GAIN-APPREC> 0.38
<PER-SHARE-DIVIDEND> (0.29)
<PER-SHARE-DISTRIBUTIONS> (0.09)
<RETURNS-OF-CAPITAL> (0.18)
<PER-SHARE-NAV-END> 10.60
<EXPENSE-RATIO> 0.95
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE JOHN
HANCOCK VARIABLE SERIES TRUST I ANNUAL REPORT DATED DECEMBER 31, 1998 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER> 19
<NAME> EMERGING MARKETS EQUITY
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 8-MOS
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-START> MAY-01-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 8,319
<INVESTMENTS-AT-VALUE> 7,296
<RECEIVABLES> 15
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 7,311
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1
<TOTAL-LIABILITIES> 1
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 10,255
<SHARES-COMMON-STOCK> 1,032
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> (9)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (1,624)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (1,312)
<NET-ASSETS> 7,310
<DIVIDEND-INCOME> 84
<INTEREST-INCOME> 24
<OTHER-INCOME> 0
<EXPENSES-NET> 81
<NET-INVESTMENT-INCOME> 27
<REALIZED-GAINS-CURRENT> (1,644)
<APPREC-INCREASE-CURRENT> (1,312)
<NET-CHANGE-FROM-OPS> (2,929)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (16)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> (11)
<NUMBER-OF-SHARES-SOLD> 1,271
<NUMBER-OF-SHARES-REDEEMED> (243)
<SHARES-REINVESTED> 4
<NET-CHANGE-IN-ASSETS> 7,310
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 68
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 192
<AVERAGE-NET-ASSETS> 7,783
<PER-SHARE-NAV-BEGIN> 10.00
<PER-SHARE-NII> 0.03
<PER-SHARE-GAIN-APPREC> (2.91)
<PER-SHARE-DIVIDEND> (0.02)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> (0.01)
<PER-SHARE-NAV-END> 7.09
<EXPENSE-RATIO> 1.55
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE JOHN
HANCOCK VARIABLE SERIES TRUST I ANNUAL REPORT DATED DECEMBER 31, 1998 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER> 20
<NAME> GLOBAL EQUITY
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 8-MOS
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-START> MAY-01-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 14,174
<INVESTMENTS-AT-VALUE> 15,264
<RECEIVABLES> 24
<ASSETS-OTHER> 1
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 15,289
<PAYABLE-FOR-SECURITIES> 4
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 4
<TOTAL-LIABILITIES> 8
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 15,474
<SHARES-COMMON-STOCK> 1,548
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> (3)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (366)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 176
<NET-ASSETS> 15,281
<DIVIDEND-INCOME> 163
<INTEREST-INCOME> 54
<OTHER-INCOME> 0
<EXPENSES-NET> 111
<NET-INVESTMENT-INCOME> 106
<REALIZED-GAINS-CURRENT> (376)
<APPREC-INCREASE-CURRENT> 176
<NET-CHANGE-FROM-OPS> (94)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (99)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> (7)
<NUMBER-OF-SHARES-SOLD> 1,800
<NUMBER-OF-SHARES-REDEEMED> (263)
<SHARES-REINVESTED> 11
<NET-CHANGE-IN-ASSETS> 15,281
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 87
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 237
<AVERAGE-NET-ASSETS> 14,410
<PER-SHARE-NAV-BEGIN> 10.00
<PER-SHARE-NII> 0.07
<PER-SHARE-GAIN-APPREC> (0.13)
<PER-SHARE-DIVIDEND> (0.07)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.87
<EXPENSE-RATIO> 1.15
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE JOHN
HANCOCK VARIABLE SERIES TRUST I ANNUAL REPORT DATED DECEMBER 31, 1998 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER> 21
<NAME> BOND INDEX
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 8-MOS
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-START> MAY-01-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 26,650
<INVESTMENTS-AT-VALUE> 27,736
<RECEIVABLES> 551
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 28,287
<PAYABLE-FOR-SECURITIES> 282
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 4
<TOTAL-LIABILITIES> 286
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 27,543
<SHARES-COMMON-STOCK> 2,748
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 458
<NET-ASSETS> 28,001
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 1,160
<OTHER-INCOME> 0
<EXPENSES-NET> 71
<NET-INVESTMENT-INCOME> 1,089
<REALIZED-GAINS-CURRENT> 267
<APPREC-INCREASE-CURRENT> 458
<NET-CHANGE-FROM-OPS> 1,814
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (1,089)
<DISTRIBUTIONS-OF-GAINS> (267)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2,623
<NUMBER-OF-SHARES-REDEEMED> (8)
<SHARES-REINVESTED> 133
<NET-CHANGE-IN-ASSETS> 28,001
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 27
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 127
<AVERAGE-NET-ASSETS> 26,307
<PER-SHARE-NAV-BEGIN> 10.00
<PER-SHARE-NII> 0.42
<PER-SHARE-GAIN-APPREC> 0.29
<PER-SHARE-DIVIDEND> (0.42)
<PER-SHARE-DISTRIBUTIONS> (0.10)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.19
<EXPENSE-RATIO> 0.40
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE JOHN
HANCOCK VARIABLE SERIES TRUST I ANNUAL REPORT DATED DECEMBER 31, 1998 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER> 22
<NAME> SMALL/MID CAP CORE
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 8-MOS
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-START> MAY-01-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 4,681
<INVESTMENTS-AT-VALUE> 4,945
<RECEIVABLES> 8
<ASSETS-OTHER> 64
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 5,017
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 2
<TOTAL-LIABILITIES> 2
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 5,501
<SHARES-COMMON-STOCK> 556
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (750)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 264
<NET-ASSETS> 5,015
<DIVIDEND-INCOME> 4
<INTEREST-INCOME> 28
<OTHER-INCOME> 0
<EXPENSES-NET> 32
<NET-INVESTMENT-INCOME> 0
<REALIZED-GAINS-CURRENT> (750)
<APPREC-INCREASE-CURRENT> 264
<NET-CHANGE-FROM-OPS> (486)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 636
<NUMBER-OF-SHARES-REDEEMED> (80)
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 5,015
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 24
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 139
<AVERAGE-NET-ASSETS> 4,561
<PER-SHARE-NAV-BEGIN> 10.00
<PER-SHARE-NII> 0
<PER-SHARE-GAIN-APPREC> (0.98)
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.02
<EXPENSE-RATIO> 1.05
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE JOHN
HANCOCK VARIABLE SERIES TRUST I ANNUAL REPORT DATED DECEMBER 31, 1998 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER> 23
<NAME> HIGH YIELD BOND
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 8-MOS
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-START> MAY-01-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 14,870
<INVESTMENTS-AT-VALUE> 14,509
<RECEIVABLES> 308
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 14,817
<PAYABLE-FOR-SECURITIES> 27
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1
<TOTAL-LIABILITIES> 28
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 15,355
<SHARES-COMMON-STOCK> 1,602
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (566)
<NET-ASSETS> 14,789
<DIVIDEND-INCOME> 7
<INTEREST-INCOME> 626
<OTHER-INCOME> 0
<EXPENSES-NET> 68
<NET-INVESTMENT-INCOME> 565
<REALIZED-GAINS-CURRENT> 7
<APPREC-INCREASE-CURRENT> (566)
<NET-CHANGE-FROM-OPS> 6
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (565)
<DISTRIBUTIONS-OF-GAINS> (7)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,741
<NUMBER-OF-SHARES-REDEEMED> (200)
<SHARES-REINVESTED> 61
<NET-CHANGE-IN-ASSETS> 14,789
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 49
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 153
<AVERAGE-NET-ASSETS> 11,329
<PER-SHARE-NAV-BEGIN> 10.00
<PER-SHARE-NII> 0.46
<PER-SHARE-GAIN-APPREC> (0.76)
<PER-SHARE-DIVIDEND> (0.46)
<PER-SHARE-DISTRIBUTIONS> (0.01)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.23
<EXPENSE-RATIO> 0
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
ERNST & YOUNG LLP
200 CLARENDON STREET
BOSTON, MASSACHUSETTS 02116-5072
Phone: 617-266-2000 Fax: 617-266-5843
Report of Independent Auditors
To the Board of Trustees
John Hancock Variable Series Trust I
In planning and performing our audit of the financial statements of John
Hancock Variable Series Trust I (comprising, respectively, the Large Cap
Growth, Sovereign Bond, International Equity Index (formerly,
International Equities), Small Cap Growth, International Balanced, Mid
Cap Growth, Large Cap Value, Money Market, Mid Cap Value, Diversified
Mid Cap Growth (formerly, Special Opportunities), Real Estate Equity,
Growth & Income, Managed, Short-Term Bond (formerly, Short-Term U.S.
Government), Small Cap Value, International Opportunities, Equity
Index, Strategic Bond, Small/Mid Cap Core, High Yield Bond, Bond Index,
Global Equity, and Emerging Markets Equity Portfolios) for the year ended
December 31, 1998, 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 internal control.
The management of John Hancock Variable Series Trust I 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 internal control, errors or fraud may
occur and not be detected. Also, projection of any evaluation of
internal control to future periods is subject to the risk that it may
become inadequate because of changes in conditions or that the
effectiveness of the design and operation may deteriorate. Our
consideration of the 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 specific internal control components does
not reduce to a relatively low level the risk that errors 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 internal control and its
operation, including controls for safeguarding securities, that we
consider to be material weaknesses as defined above at December 31,1998.
This report is intended solely for the information and use of the Board
of Trustees and management of John Hancock Variable Series Trust I and
the Securities and Exchange Commission and is not intended to be and
should not be used by anyone other than these specified parties.
February 10, 1999 ERNST & YOUNG LLP
Boston, Massachusetts
Ernst & Young LLP is a member of Ernst & Young International, Ltd.
