HANCOCK JOHN INVESTMENT TRUST IV
N-30D, 1998-01-29
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                               John Hancock Funds

          
                                    Discovery
                                      Fund

                                 Annual Report


                                Ocotber 31, 1997

<PAGE>
                       John Hancock Funds - Discovery Fund

                                    Trustees
                             Edward J. Boudreau, Jr.
                              Dennis S. Aronowitz*
                            Richard P. Chapman, Jr.*
                              William J. Cosgrove*
                               Douglas M. Costle*
                               Leland O. Erdahl *
                              Richard A. Farrell *
                                 Gail D. Fosler*
                               William F. Glavin *
                                 Anne C. Hodsdon
                                 John A. Moore*
                             Patti McGill Peterson*
                                 John W. Pratt*
                               Richard S. Scipione
                                Edward Spellman*
                        * Members of the Audit Committee
                                    Officers
                             Edward J. Boudreau, Jr.
                      Chairman and Chief Executive Officer
                               Robert G. Freedman
                                Vice Chairman and
                            Chief Investment Officer
                                 Anne C. Hodsdon
                                    President
                                 James B. Little
                            Senior Vice President and
                             Chief Financial Officer
                                 Susan S. Newton
                          Vice President and Secretary
                               James J. Stokowski
                          Vice President and Treasurer
                                Thomas H. Connors
                  Second Vice President and Compliance Officer
                                    Custodian
                         Investors Bank & Trust Company
                              200 Clarendon Street
                           Boston, Massachusetts 02116
                                 Transfer Agent
                      John Hancock Signature Services, Inc.
                         1 John Hancock Way, Suite 1000
                        Boston, Massachusetts 02217-1000
                               Investment Adviser
                           John Hancock Advisers, Inc.
                              101 Huntington Avenue
                        Boston, Massachusetts 02199-7603
                              Principal Distributor
                            John Hancock Funds, Inc.
                              101 Huntington Avenue
                        Boston, Massachusetts 02199-7603
                                  Legal Counsel
                                  Hale and Dorr
                                 60 State Street
                           Boston, Massachusetts 02109
                              Independent Auditors
                               Ernst & Young LLP
                              200 Clarendon Street
                        Boston, Massachusetts 02116-5072


<PAGE>

                       John Hancock Funds - Discovery Fund

Statement of Assets and Liabilities
October 31, 1997
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------------------------------------------------
<S>                                                                                                                <C>
Assets:
     Investments at value - Note C:
        Common Stocks                               (cost - $ 109,033,840)                                    $140,917,366         
        Joint repurchase agreement                  (cost - $     628,000)                                         628,000
        Corporate savings account                                                                                       46
                                                                                                    ----------------------
                                                                                                               141,545,412

     Receivable for investments sold                                                                             1,328,887
     Receivable for shares sold                                                                                    226,806
     Interest receivable                                                                                               121
     Other assets                                                                                                    1,557
                                                                                                    ----------------------
                                                                               Total Assets                    143,102,783
                                                                               -------------------------------------------
Liabilities:
     Payable for investments purchased                                                                           1,367,970
     Payable for shares repurchased                                                                                163,378
     Payable to John Hancock Advisers, Inc.
        and affiliates - Note B                                                                                    148,617
     Accounts payable and accrued expenses                                                                          35,094
                                                                                                    ----------------------
                                                                               Total Liabilities                 1,715,059
                                                                               -------------------------------------------
Net Assets:
     Capital paid-in                                                                                           108,031,718
     Accumulated realized gain on investments and foreign currency transactions                                  1,474,030
     Net unrealized appreciation of investments                                                                 31,883,717
     Accumulated net investment loss                                                                                (1,741)
                                                                                                    ----------------------
                                                                               Net Assets                     $141,387,724
                                                                               ===========================================
Net Asset Value Per Share:
     (Based on net asset values and shares of beneficial interest outstanding -
     unlimited number of shares authorized with no par value)
     Class A - $46,288,680 / 2,707,537                                                                              $17.10
     =====================================================================================================================
     Class B - $95,099,044 / 5,843,429                                                                              $16.27
     =====================================================================================================================
Maximum Offering Price Per Share*
     Class A - ($17.10 x 105.26%)                                                                                   $18.00        
     =====================================================================================================================
     * On single retail sales of less than $50,000.  On sales of $50,000 or more
     and on group sales the offering price is reduced.
</TABLE>
                       See Notes to Financial Statements.


<PAGE>
                       John Hancock Funds - Discovery Fund

Statement of Operations
Year ended October 31, 1997
- --------------------------------------------------------------------------------

Investment Income:
   Interest                                                          $  271,392
   Dividends                                                            248,091
                                                                     ----------
                                                                        519,483
                                                                     ----------
   Expenses:
     Investment management fee - Note B                               1,064,031
     Distribution and service fee - Note B
       Class A                                                          142,693
       Class B                                                          943,065
     Transfer agent fee - Note B                                        564,586
     Custodian fee                                                       98,735
     Registration and filing fees                                        59,711
     Printing                                                            30,434
     Auditing fee                                                        28,500
     Financial services fee - Note B                                     26,051
     Trustees' fees                                                      11,875
     Miscellaneous                                                        4,432
     Legal fees                                                           1,775
                                                                     ----------
                   Total Expenses                                     2,975,888
                   ------------------------------------------------------------
                   Net Investment Loss                               (2,456,405)
                   ------------------------------------------------------------

Realized and Unrealized Gain on Investments:
   Net realized gain on investments sold                              3,061,999
   Change in net unrealized appreciation/depreciation
      of investments                                                  8,352,255
                                                                     ----------
                   Net Realized and Unrealized Gain on
                   Investments                                       11,414,254
                   ------------------------------------------------------------
                   Net Increase in Net Assets
                   Resulting from Operations                         $8,957,849
                   ============================================================

                       See Notes to Financial Statements
<PAGE>
                       John Hancock Funds - Discovery Fund

Statement of Changes in Net Assets
<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------------------------------------

                                                                                                 PERIOD FROM
                                                                                                  AUGUST 1,            
                                                                                    YEAR ENDED     1996 TO    YEAR ENDED
                                                                                     JULY 31,    OCTOBER 31,  OCTOBER 31,
                                                                                       1996       1996 (1)        1997
                                                                                   ------------ ------------  ------------
<S>                                                                                  <C>             <C>            <C>  
Increase (Decrease) in Net Assets:
From Operations:
  Net investment loss                                                               ($1,011,877)   ($587,256)  ($2,456,405)
  Net realized gain (loss) on investments sold and foreign currency transactions      1,751,805   (1,588,518)    3,061,999
  Change in net unrealized appreciation/depreciation of investments                  (1,130,239)   9,432,551     8,352,255
                                                                                   ------------ ------------  ------------
   Net Increase (Decrease) in Net Assets Resulting from Operations                     (390,311)   7,256,777     8,957,849
                                                                                   ------------ ------------  ------------

Distributions to Shareholders:
  Distributions from net realized gain on investments sold
   Class A - ($0.1312, none and $0.1140 per share, respectively)                        (61,866)          -       (377,494)
                                                                                                          
   Class B - ($0.1312, none and $0.1140 per share, respectively)                       (350,267)          -       (775,851)        
                                                                                   ------------ ------------  ------------
   Total Distributions to Shareholders                                                 (412,133)          -     (1,153,345)        
                                                                                   ------------ ------------  ------------
From Fund Share Transactions - Net: *                                                64,682,010   40,664,165   (14,937,605)
                                                                                   ------------ ------------  ------------
Net Assets:
  Beginning of period                                                                36,720,317  100,599,883   148,520,825
                                                                                   ------------ ------------  ------------
  End of period (including accumulated net investment loss
   of none, $1,087 and $1,741, respectively)                                       $100,599,883 $148,520,825  $141,387,724
                                                                                   ============ ============  ============

  * Analysis of Fund Share Transactions:

                                                                                 PERIOD FROM
                                                       YEAR ENDED             AUGUST 1, 1996 TO               YEAR ENDED
                                                     JULY 31, 1996           OCTOBER 31, 1996 (1)          OCTOBER 31, 1997
                                              -------------------------   -------------------------    -----------------------
                                                 SHARES       AMOUNT        SHARES        AMOUNT        SHARES        AMOUNT
                                              ----------   ------------   ----------   ------------    ---------   -----------
  CLASS A
   Shares sold                                 6,629,390   $105,087,816    6,727,252   $112,934,558    4,483,350   $67,441,611
   Shares issued to shareholders in            
   reinvestment of distributions                   4,495         57,719           -              -        23,197       340,089
                                              ----------   ------------   ----------   ------------    ---------   -----------     
                                               6,633,885    105,145,535    6,727,252    112,934,558    4,506,547    67,781,700
   Less shares repurchased                    (4,904,679)   (76,082,263)  (5,595,291)   (96,031,768)  (5,051,999)  (76,943,832)
                                              ==========   ============   ==========   ============   ==========   ===========
   Net increase (decrease)                     1,729,206    $29,063,272    1,131,961    $16,902,790     (545,452)  ($9,162,132)
                                              ==========   ============   ==========   ============   ==========   ===========
  CLASS B
   Shares sold                                 3,295,866    $51,516,179    2,908,304    $46,987,243    3,577,728   $51,201,699
   Shares issued to shareholders in                         
   reinvestment of distributions                  25,501        315,955           -              -        47,151       662,535
                                              ----------   ------------   ----------   ------------    ---------   -----------
                                               3,321,367     51,832,134    2,908,304     46,987,243    3,624,879    51,864,234
   Less shares repurchased                    (1,113,915)   (16,213,396)  (1,430,974)   (23,225,868)  (3,989,627)  (57,639,707)
                                              ==========   ============   ==========   ============    =========   ===========
   Net increase (decrease)                     2,207,452    $35,618,738    1,477,330    $23,761,375     (364,748)  ($5,775,473)
                                              ==========   ============   ==========   ============    =========   ===========

(1)  Effective  October  31,  1996 the  fiscal  period  changed  from July 31 to
     October 31.
</TABLE>
                       See Notes to Financial Statements.
<PAGE>

                       John Hancock Funds - Discovery Fund

Financial Highlights
Selected data for a share of beneficial  interest  outstanding  throughout  each
period  indicated,  investment  returns,  key ratios and  supplemental  data are
listed as follows:
<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------------------------------------
                                                                                
                                                                       
                                                                 YEAR ENDED JULY 31,               PERIOD FROM                     
                                                     ---------------------------------------   AUGUST 1, 4996 TO       YEAR ENDED
                                                      1993      1994       1995       1996    OCTOBER 31, 1996 (6)  OCTOBER 31, 1997
                                                     -------   ------     ------     -------  --------------------  ----------------
<S>                                                    <C>       <C>       <C>     <C>              <C>                   <C>
CLASS A
Per Share Operating Performance 
   Net Asset Value, Beginning of Period               $8.95    $10.81      $8.56      $12.95        $15.09               $16.13
                                                     ------    ------     ------     -------       -------              ------- 
   Net Investment Loss                                (0.16)    (0.16)(1)  (0.17)(1)   (0.19)(1)     (0.05)(1)            (0.19)(1)
   Net Realized and Unrealized Gain (Loss)                                                        
   on Investments and Foreign Currency                                                            
   Transactions                                        2.15     (0.43)      4.83        2.46          1.09                 1.27
                                                     ------    ------     ------     -------       -------              -------
         Total from Investment Operations              1.99     (0.59)      4.66        2.27          1.04                 1.08
                                                     ------    ------     ------     -------       -------              -------
   Less Distributions:                                                                            
   Distributions from Net Realized Gain               (0.13)    (1.66)     (0.27)      (0.13)           -                 (0.11)
   on Investments Sold                               ------    ------     ------     -------       -------              -------
                                                                                                  
   Net Asset Value, End of Period                    $10.81     $8.56      12.95      $15.09        $16.13               $17.10
                                                     ======    ======     ======     =======       =======              =======
   Total Investment Return at Net Asset Value (2)    22.33%    (6.45%)    55.80%      17.72%         6.89%(3)             6.84%
                                                                                                  
Ratios and Supplemental Data                                                                      
   Net Assets, End of Period (000s omitted)          $4,692    $3,226     $5,075     $32,009       $52,479              $46,289
   Ratio of Expenses to Average Net Assets            2.17%     2.01%      2.10%       1.72%         1.65%(4)             1.63%
   Ratio of Net Investment Loss to                   (1.61%)   (1.64%)    (1.73%)     (1.26%)       (1.20%)(4)           (1.26%)
   Average Net Assets                                                                             
   Portfolio Turnover Rate                             148%      108%       118%        116%           45%                 262%
   Average Broker Commission Rate (5)                   N/A       N/A        N/A         N/A       $0.0628              $0.0679
                                                                                                

CLASS B
Per Share Operating Performance
   Net Asset Value, Beginning of Period               $8.87    $10.65      $8.34      $12.54        $14.50               $15.47
                                                    -------   -------    -------     -------        ------              -------
   Net Investment Loss                                (0.23)    (0.22)(1)  (0.22)(1)   (0.27)(1)     (0.08)(1)            (0.29)(1)
   Net Realized and Unrealized Gain (Loss) 
   on Investments and Foreign Currency      
   Transactions                                        2.14     (0.43)      4.69        2.36          1.05                 1.20 
                                                    -------   -------    -------     -------       -------              -------
     Total from Investment Operations                  1.91     (0.65)      4.47        2.09          0.97                 0.91
                                                    -------   -------    -------     -------       -------              -------
   Less Distributions:
   Distributions from Net Realized Gain               
   on Investments Sold                                (0.13)    (1.66)     (0.27)      (0.13)           -                 (0.11)
                                                    -------   -------    -------     -------       -------              -------
   Net Asset Value, End of Period                    $10.65     $8.34     $12.54      $14.50        $15.47               $16.27
                                                    =======   =======    =======     =======       =======              =======
   Total Investment Return at Net Asset Value (2)    21.63%    (7.18%)    54.97%      16.85%         6.69% (3)            6.03%

Ratios and Supplemental Data
   Net Assets, End of Period (000s omitted)         $38,672   $26,537    $31,645     $68,591       $96,042              $95,099
   Ratio of Expenses to Average Net Assets            2.86%     2.62%      2.70%       2.42%         2.37%(4)             2.33%
   Ratio of Net Investment Loss to                   
   Average Net Assets                                (2.26%)   (2.24%)    (2.34%)     (1.96%)       (1.93%) (4)          (1.97%)
   Portfolio Turnover Rate                             148%      108%       118%        116%           45%                 262%
   Average Broker Commission Rate (5)                   N/A       N/A        N/A         N/A       $0.0628              $0.0679


(1)  Based on the of the  average of the shares  outstanding  at the end of each
     month.
(2)  Assumes  dividend  reinvestment  and does not  reflect  the effect of sales
     charges.
(3)  Not annualized.
(4)  Annualized.
(5)  Per portfolio share traded.  Required for fiscal years that began September
     1, 1995 or later.
(6)  Effective  October 31,  1996,  the fiscal  period  changed  from July 31 to
     October 31.
</TABLE>
                       See Notes to Financial Statements.
<PAGE>

                      John Hancock Funds - Discovery Fund

Schedule of Investments
October 31, 1997

                                                     NUMBER OF         MARKET
ISSUER, DESCRIPTION                                    SHARES          VALUE
- -------------------                                  ---------         ------

COMMON STOCKS
Advertising (1.63%)
Outdoor Systems, Inc.*                                75,000          2,306,250
                                                                  -------------
Automobile / Trucks (1.04%)                                      
Lear Corp.*                                           30,600          1,470,712
                                                                  -------------
Beverages (1.93%)                                                
Beringer Wine Estates Holdings, Inc. (Class B)*        6,900            213,900
Mondavi (Robert) Corp. (Class A)*                     49,400          2,510,137
                                                                  -------------
                                                                      2,724,037
                                                                  -------------
Building (.99%)                                                  
Royal Group Technologies Ltd.* (Canada)               55,000          1,395,625
                                                                  -------------
Business Services - Misc (1.43%)                                 
Corrections Corporation of America*                   50,000          1,525,000
Market Facts, Inc.                                    22,000            445,500
Securacom, Inc.*                                       5,300             49,687
                                                                  -------------
                                                                      2,020,187
                                                                  -------------
Computers (18.97%)
America Online, Inc.*                                 30,000          2,310,000
Aspect Development, Inc.*                             36,900          1,725,075
Bay Networks, Inc.*                                   65,000          2,055,625
BMC Software, Inc.*                                   35,000          2,113,125
CBT Group PLC,* American Depositary                              
 Receipt (ADR),  (Ireland)                            32,800          2,517,400
Compaq Computer Corp.                                 25,000          1,593,750
Discreet Logic, Inc.*                                 39,800            778,587
E*TRADE Group, Inc.*                                  78,000          2,408,250
HBO & Co.                                             50,300          2,188,050
Iomega Corp.*                                         95,000          2,547,188
Network Appliance, Inc.*                              63,100          3,170,775
SCM Microsystems, Inc.*                                2,300             53,475
SPR Inc.*                                              2,400             41,400
Symantec Corp.*                                       50,000          1,093,750
Visio Corp.*                                          60,000          2,231,250
                                                                  --------------
                                                                     26,827,700
                                                                  --------------

                       See Notes to Financial Statements.
<PAGE>

                      John Hancock Funds - Discovery Fund


                                                     NUMBER OF         MARKET
ISSUER, DESCRIPTION                                    SHARES          VALUE
- -------------------                                  ---------         ------

Electronics (10.72%)
ASM Lithography Holding N.V.* (Netherlands)           28,200          2,065,650
ATMI, Inc.*                                           70,000          1,881,250
Level One Communications, Inc.*                       50,000          2,250,000
Metromedia Fiber Network, Inc. (Class A)*              5,400            129,600
Novellus Systems, Inc.*                               41,200          1,833,400
Semtech Corp.*                                        45,000          2,095,312
Teradyne, Inc.*                                       30,200          1,130,612
Unitrode Corp.*                                       60,000          1,608,750
Vitesse Semiconductor Corp.*                          50,000          2,168,750
                                                                  -------------
                                                                     15,163,324
                                                                  -------------
Finance (3.16%)                  
                                                             
FIRSTPLUS Financial Group, Inc.*                      37,600          2,068,000
Medallion Financial Corp.                            114,000          2,394,000
                                                                  -------------
                                                                      4,462,000
                                                                  -------------
Food (0.04%)
American Italian Pasta Co. (Class A)*                  2,500             52,500
                                                                  -------------
Insurance (2.25%)
Ace, Ltd. (Bermuda)                                   17,400          1,617,113
Progressive Corp.                                     15,000          1,563,750
                                                                  --------------
                                                                      3,180,863
                                                                  --------------
Lasers - Systems / Components (.93%)                             
Cymer, Inc.*                                          52,700          1,205,513
General Scanning, Inc.*                                4,400            113,575
                                                                  -------------
                                                                      1,319,088
                                                                  -------------
Leisure (1.78%)
Carnival Corp. (Class A)                              52,000          2,522,000
                                                                  -------------
Machinery (1.62%)                                                
Gardner Denver Machinery, Inc.*                       63,900          2,292,413
                                                                  -------------
Media (6.59%)
Central Newspapers, Inc. (Class A)                    40,000          2,627,500
Clear Channel Communications, Inc.*                   40,000          2,640,000
Heftel Broadcasting Corp. (Class A)*                  35,000          2,327,500
Jacor Communications, Inc.*                           40,000          1,675,000
Petersen Cos., Inc. (The) (Class A)*                   2,200             43,450
                                                                  -------------
                                                                      9,313,450
                                                                  -------------

                       See Notes to Financial Statements.

<PAGE>

                      John Hancock Funds - Discovery Fund


                                                     NUMBER OF         MARKET
ISSUER, DESCRIPTION                                    SHARES          VALUE
- -------------------                                  ---------         ------

Medical (2.11%)
Warner-Lambert Co.                                    11,500          1,646,656
Wesley Jessen VisionCare, Inc.*                       45,900          1,342,575
                                                                  -------------
                                                                      2,989,231
                                                                  -------------
Metal (1.50%)
Maverick Tube Corp.*                                  60,000          2,115,000
                                                                  -------------
Office (1.68%)                                                   
HON Industries, Inc.                                  45,900          2,369,588
                                                                  -------------
Oil & Gas (11.22%)                                               
ENSCO International, Inc.*                            75,000          3,154,688
EVI, Inc.*                                            43,600          2,798,575
Falcon Drilling Co., Inc.*                            80,000          2,910,000
Marine Drilling Co.,  Inc.*                           65,400          1,937,475
National-Oilwell, Inc.*                               30,000          2,296,875
Precision Drilling Corp.* (Canada)                    90,000          2,767,500
                                                                  -------------
                                                                     15,865,113
                                                                  -------------
Pollution Control (10.00%)
ITEQ, Inc.*                                          194,400          2,430,000
Newpark Resources, Inc.*                              80,200          3,328,300
Philip Services Corp.* (Canada)                      246,000          4,305,000
US Filter Corp.*                                      60,000          2,407,500
USA Waste Services, Inc.*                             45,000          1,665,000
                                                                  -------------
                                                                     14,135,800
                                                                  -------------
Retail (9.48%)
Borders Group, Inc. *                                 70,000          1,815,625
Consolidated Stores Corp.*                            57,500          2,292,813
Costco Cos., Inc.*                                    60,000          2,310,000
Dollar General Corp.                                  63,750          2,107,734
Home Depot, Inc.                                      55,000          3,059,375
Starbucks Corp.*                                      55,000          1,815,000
                                                                  -------------
                                                                     13,400,547
                                                                  -------------
Schools / Education (1.93%)
Apollo Group, Inc. (Class A)*                         64,500          2,725,125
                                                                  --------------

                       See Notes to Financial Statements.
<PAGE>
                      John Hancock Funds - Discovery Fund


                                                     NUMBER OF         MARKET
ISSUER, DESCRIPTION                                    SHARES          VALUE
- -------------------                                  ---------         ------

Steel (1.48%)
Lone Star Technologies, Inc.*                         55,000          2,100,313
                                                                  -------------
Telecommunications (7.16%)                                       
Comverse Technology, Inc.*                            50,200          2,070,750
Innova Corp.*                                         35,400            761,100
Nextel Communications, Inc. (Class A)*               100,000          2,625,000
Qwest Communications International Inc.*              40,300          2,488,525
WorldCom, Inc.*                                       65,000          2,185,625
                                                                  -------------
                                                                     10,131,000
                                                                  -------------
Transport (0.03%)
Jevic Transportation, Inc.*                            2,000             35,500
                                                                  -------------
                                TOTAL COMMON STOCK                     
                               (Cost $109,033,840)   (99.67%)       140,917,366
                                                      ------      -------------
<TABLE>
<CAPTION>                                                                                              
                                                 INTEREST          PAR VALUE         MARKET
SHORT-TERM INVESTMENTS                             RATE         (000'S OMITTED)      VALUE
- ----------------------                             ----         ---------------      -----
<S>                                                  <C>              <C>            <C>
Joint Repurchase Agreement (0.44%)                                                            
Investment in a joint repurchase agreement                                                    
   transaction with Aubrey G. Lanston & Co. -                                            
   Dated 10-31-97, Due 11-03-97 (secured by
   U.S. Treasury Notes, 5.00% thru 9.25%
   due 02-28-98 thru 04-30-02), - Note A           5.68               628            628,000
                                                                                ------------
                                                                                              
Corporate Savings Account (  0.00%)                                                           
  Investors Bank & Trust Company                                                              
    Daily Interest Savings Account                                                            
    Current Rate 4.95%                                                                    46
                                                                                ------------
                                 TOTAL SHORT-TERM INVESTMENTS      (0.44%)           628,046
                                                                   -------      ------------
                                           TOTAL INVESTMENTS     (100.11%)       141,545,412
                                                                 ==========     ============
*Non-Income producing security.                                                               
Parenthetical  disclosure  of a  foreign  country  in the  security  description              
represents  country  of a  foreign  issuer,  however,  security  is U.S.  dollar              
denominated.                                                                                  
                                                                                              
The  percentage  shown for each  investment  category is the total value of that              
category as a percentage of the net assets of the Fund.                                       
</TABLE>                                                                        
  

                       See Notes to Financial Statements.
                                                                              
<PAGE>                                                                          

                      John Hancock Funds - Discovery Fund


Portfolio Concentration (Unaudited)
- --------------------------------------------------------------------------------

The Discovery Fund invests  primarily in securities  issued in the United States
of America.  The  performance  of the Fund is closely  tied to the  economic and
financial condition within the countries in which it invests.  The concentration
of  investments  by  individual  securities  held by the  Fund is  shown  in the
schedule of  investments.  In  addition,  concentration  of  investments  can be
aggregated  by various  countries.  The table below shows the  percentage of the
Fund's investments at October 31,1997 assigned to country categories.           
                                                                                
                                                                                
                                                                                
                                             MARKET VALUE
                                            AS A PERCENTAGE                    
                                              OF FUND'S
COUNTRY DIVERSIFICATION                       NET ASSETS                        
- -----------------------                     ---------------                     
Canada                                                5.99%
Ireland                                               1.78
Netherlands                                           1.46         
United States                                        89.74         
Bermuda                                               1.14         
                                           ---------------- 
                    TOTAL INVESTMENTS               100.11%        
                                           ================ 
                                                            
                                                            








                       See Notes to Financial Statements.
<PAGE>

                       John Hancock Funds - Discovery Fund

NOTE A --
ACCOUNTING POLICIES
John Hancock Investment Trust IV (the "Trust")(formerly  Freedom InvestmentTrust
III) is a diversified open-end management  investment company,  registered under
the  Investment  Company Act of 1940.  The Trust  consists  of one series:  John
Hancock Discovery Fund (the "Fund").  The investment objective of the Fund is to
achieve long-term capital appreciation through investment primarily in companies
that appear to offer superior growth prospects.

     The Trustees have authorized the issuance of multiple  classes of shares of
the Fund,  designated  as Class A and Class B shares.  The  shares of each class
represent an interest in the same  portfolio of investments of the Fund and have
equal rights to voting,  redemptions,  dividends  and  liquidation,  except that
certain  expenses,  subject  to the  approval  of the  Trustees,  may be applied
differently  to each class of shares in accordance  with current  regulations of
the  Securities  and  Exchange  Commission  and the  Internal  Revenue  Service.
Shareholders  of a class which bears  distribution  and service  expenses  under
terms of a distribution  plan have exclusive voting rights to that  distribution
plan.

     Significant accounting policies of the Fund are as follows:

VALUATION OF  INVESTMENTS  Securities in the Fund's  portfolio are valued on the
basis of market quotations,  valuations provided by independent pricing services
or at fair value as  determined  in good  faith in  accordance  with  procedures
approved by the Trustees.  Short-term debt  investments  maturing within 60 days
are valued at amortized  cost which  approximates  market  value.  All portfolio
transactions  initially  expressed  in terms of  foreign  currencies  have  been
translated  into U.S.  dollars as  described in "Foreign  Currency  Translation"
below.

JOINT  REPURCHASE  AGREEMENT  Pursuant  to an  exemptive  order  issued  by  the
Securities  and  Exchange  Commission,  the Fund,  along with  other  registered
investment  companies having a management  contract with John Hancock  Advisers,
Inc. (the "Adviser"), a wholly owned subsidiary of The Berkeley Financial Group,
may  participate in a joint  repurchase  agreement.  Aggregate cash balances are
invested in one or more repurchase  agreements,  whose underlying securities are
obligations of the U.S.  government  and/or its agencies.  The Fund's  custodian
bank receives delivery of the underlying securities for the joint account on the
Fund's  behalf.  The Adviser is  responsible  for ensuring that the agreement is
fully collateralized at all times.

INVESTMENT  TRANSACTIONS  Investment transactions are recorded as of the date of
purchase,  sale  or  maturity.  Net  realized  gains  and  losses  on  sales  of
investments are determined on the identified cost basis.  Capital gains realized
on some foreign  securities  are subject to foreign  taxes and are  accrued,  as
applicable.

FEDERAL INCOME TAXES The Fund's policy is to comply with the requirements of the
Internal Revenue Code that are applicable to regulated  investment companies and
to  distribute  all of its taxable  income,  including  any net realized gain on
investment,  to its shareholders.  Therefore, no federal income tax provision is
required.

DIVIDENDS,  DISTRIBUTIONS AND INTEREST Dividend income on investment  securities
is recorded on the ex-dividend date, or, in the case of some foreign securities,
on the date  thereafter  when the Fund is made aware of the  dividend.  Interest
income on investment securities is recorded on the accrual basis. Foreign income
may be subject to foreign withholding taxes which are accrued as applicable.

     The Fund records all  distributions  to  shareholders  from net  investment
income and  realized  gains on the  ex-dividend  date.  Such  distributions  are
determined  in  conformity  with income tax  regulations,  which may differ from
generally  accepted  accounting  principles.  Dividends  paid by the  Fund  with
respect to each class of shares will be  calculated  in the same manner,  at the
same time and will be in the same amount, except for the effect of expenses that
may be applied differently to each class.

CLASS  ALLOCATIONS  Income,  common  expenses and realized and unrealized  gains
(losses) are  calculated at the Fund level and allocated  daily to each class of
shares  based  on  the  appropriate  net  assets  of  the  respective   classes.
Distribution  and service fees, if any, are calculated  daily at the class level
based on the  appropriate  net  assets of each  class and the  specific  expense
rate(s) applicable to each class.


<PAGE>

                      John Hancock Funds - Discovery Fund


USE OF ESTIMATES The  preparation  of these  financial  statements in accordance
with generally accepted  accounting  principles  incorporates  estimates made by
management in determining the reported amounts of assets, liabilities,  revenues
and expenses of the Fund. Actual results could differ from these estimates.

BANK  BORROWINGS The Fund is permitted to have bank  borrowings for temporary or
emergency purposes,  including the meeting of redemption requests that otherwise
might require the untimely  disposition of securities.  These agreements  enable
the Fund to participate  with other Funds managed by the Advisor in an unsecured
line  of  credit  with  banks  which  permit  borrowings  up  to  $600  million,
collectively.  Interest is charged to each Fund,  based on its  borrowing,  at a
rate equal to 0.50% over the Fed Funds Rate. In addition, a commitment fee, at a
rate of 0.075% per annum based on the average  daily unused  portion of the line
of credit, is allocated among the participating Funds. The Fund had no borrowing
activity for the year ended October 31, 1997.

NOTE B -- 
MANAGEMENT  FEE AND  TRANSACTIONS  WITH  AFFILIATES AND OTHERS 
Under  the  present  investment  management  contract,  the Fund  pays a monthly
management fee to the Adviser for a continuous investment program equivalent, on
an annual basis, to the sum of (a) 0.75% of the first $750,000,000 of the Fund's
average  daily net asset  value and (b) 0.70% of the  Fund's  average  daily net
asset value in excess of $750,000,000.

     The Fund has a distribution  agreement  with John Hancock Funds,  Inc. ("JH
Funds"),  a wholly owned  subsidiary of the Adviser.  For the year ended October
31,  1997,  net sales  charges  received  with regard to sales of Class A shares
amounted to  $456,183.  Out of this  amount,  $72,968 was  retained and used for
printing  prospectuses,   advertising,  sales  literature  and  other  purposes,
$249,811 was paid as sales commissions to unrelated  broker-dealers and $133,404
was paid as sales  commissions to sales personnel of John Hancock  Distributors,
Inc. ("Distributors"), Tucker Anthony, Incorporated ("Tucker Anthony") and Sutro
& Co., Inc. ("Sutro"),  all of which are broker-dealers.  The Adviser's indirect
parent, John Hancock Mutual Life Insurance Company ("JHMLICo"),  is the indirect
sole shareholder of Distributors and was the indirect shareholder until November
29, 1996 of John Hancock Freedom  Securities  Corporation  and its  subsidiaries
which include Tucker Anthony and Sutro.

     Class B shares  which are  redeemed  within six years of  purchase  will be
subject to a  contingent  deferred  sales  charge  ("CDSC") at  declining  rates
beginning  at 5.0% of the  lesser  of the  current  market  value at the time of
redemption or the original purchase cost of the shares being redeemed.  Proceeds
from the CDSC  are paid to JH Funds  and are used in whole or in part to  defray
its  expenses  for  providing  distribution  related  services  to the  Fund  in
connection with the sale of Class B shares. For the year ended October 31, 1997,
contingent deferred sales charges paid to JH Funds amounted to $401,344.

     In  addition,  to  reimburse  JH Funds  for the  services  it  provides  as
distributor of shares of the Fund, the Fund has adopted  Distribution Plans with
respect  to Class A and Class B  pursuant  to Rule  12b-1  under the  Investment
Company Act of 1940.  Accordingly,  the Fund will make  payments to JH Funds for
distribution  and service  expenses,  at an annual  rate not to exceed  0.30% of
Class A average  daily net assets and 1.00% of Class B average  daily net assets
to reimburse JH Funds for its distribution and service costs. Up to a maximum of
0.25% of such  payments may be service  fees as defined by the amended  Rules of
Fair  Practice of the National  Association  of  Securities  Dealers.  Under the
amended  Rules of Fair  Practice,  curtailment  of a portion of the Fund's 12b-1
payments could occur under certain circumstances.

     The Fund  has a  transfer  agent  agreement  with  John  Hancock  Signature
Services,  Inc. ("Signature  Services"),  an indirect subsidiary of JHMLICo. The
Fund pays transfer  agent fees based on the number of  shareholder  accounts and
certain  out-of-pocket  expenses.  The Fund has an agreement with the Adviser to
perform  necessary  tax and  financial  management  services  for the Fund.  The
compensation  for the  year  was at an  annual  rate of less  than  0.02% of the
average net assets of the Fund.

     Mr.  Edward J.  Boudreau,  Jr.,  Ms. Anne C.  Hodsdon,  and Mr.  Richard S.
Scipione are trustees and/or  officers of the Adviser and/or its affiliates,  as
well as Trustees of the Fund. The compensation of unaffiliated Trustees is borne
by the Fund. The unaffiliated Trustees may elect to defer for tax purposes their

<PAGE>

                      John Hancock Funds - Discovery Fund


receipt of this  compensation  under the John  Hancock  Group of Funds  Deferred
Compensation  Plan. The Fund makes investments into other John Hancock funds, as
applicable, to cover its liability for the deferred compensation. Investments to
cover the Fund's  deferred  compensation  liability  are  recorded on the Fund's
books as an other asset.  The deferred  compensation  liability  and the related
other  asset are always  equal and are  marked to market on a periodic  basis to
reflect any income earned by the investment as well as any  unrealized  gains or
losses.  At October  31,  1997,  the Fund's  investments  to cover the  deferred
compensation liability had unrealized appreciation of $192.

NOTE C --
INVESTMENT TRANSACTIONS 
Purchases and proceeds from sales of securities,  other than  obligations of the
U.S.  government  and its agencies and  short-term  securities,  during the year
ended October 31, 1997, aggregated $356,721,974 and $366,578,572,  respectively.
There were no purchases or sales of obligations  of the U.S.  government and its
agencies  during the year ended October 31, 1997. 

     The cost of  investments  owned at October  31, 1997  (including  the joint
repurchase  agreement) for federal income tax purposes was  $109,697,788.  Gross
unrealized  appreciation and depreciation of investments  aggregated $34,577,338
and  $2,729,760,  respectively,  resulting  in net  unrealized  appreciation  of
$31,847,578.

NOTE D -- 
RECLASSIFICATION OF ACCOUNTS 
During the year ended  October 31, 1997,  the Fund has  reclassified  amounts to
reflect a  decrease  in  accumulated  realized  gain on  investments  of $70,  a
decrease in  accumulated  net  investment  loss of $2,455,751  and a decrease in
capital paid-in of $2,455,681.  This  represents the amount  necessary to report
these balances on a tax basis,  excluding certain temporary  differences,  as of
October 31, 1997.  Additional  adjustments may be needed in subsequent reporting
periods. These reclassifications, which have no impact on the net asset value of
the Fund, are primarily attributable to the net investment loss. The calculation
of net investment  income per share in the financial  highlights  excludes these
adjustments.

NOTE E --
SUBSEQUENT EVENT
On September 9, 1997  shareholders  approved a vote on a proposed merger between
the Fund and the John Hancock Growth Fund ("Growth  Fund").  The  reorganization
provided for a transfer of  substantially  all the assets and liabilities of the
Fund to the Growth Fund.  After the  transaction and as of the close of business
on December 5, 1997, the Fund will be terminated.

<PAGE>

                      John Hancock Funds - Discovery Fund


REPORT OF ERNST & YOUNG LLP,  INDEPENDENT  AUDITORS 
To the Board of Trustees and Shareholders of
     John Hancock Discovery Fund

We have audited the accompanying  statement of assets and  liabilities,including
the schedule of  investments,of  the John Hancock Discovery Fund (the "Fund"),as
of October 31, 1997, and the related statement of operations for the year ended,
and the statement of changes in net assets and the financial highlights for each
of the periods  indicated  therein.  These  financial  statements  and financial
highlights are the responsibility of the Fund's  management.  Our responsibility
is to express an opinion on these financial  statements and financial highlights
based on our audits.

We  conducted  our  audits  in  accordance  with  generally   accepted  auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable  assurance  about  whether the  financial  statements  and  financial
highlights are free of material misstatement.  An audit includes examining, on a
test basis,  evidence  supporting  the amounts and  disclosures in the financial
statements.  Our  procedures  included  confirmation  of securities  owned as of
October 31, 1997, by  correspondence  with the custodian and brokers,  and other
auditing  procedures when replies from brokers were not received.  An audit also
includes assessing the accounting principles used and significant estimates made
by  management,   as  well  as  evaluating  the  overall   financial   statement
presentation.  We believe  that our audits  provide a  reasonable  basis for our
opinion.

In our opinion,  the financial  statements and financial  highlights referred to
above present fairly, in all material  respects,  the financial  position of the
John Hancock  Discovery  Fund at October 31, 1997, the results of its operations
for  the  year  ended,  and the  changes  in its net  assets  and the  financial
highlights  for each of the  indicated  periods,  in conformity  with  generally
accepted accounting principles.

Ernst & Young LLP


Boston, Massachusetts
December 11, 1997


TAX INFORMATION NOTICE (UNAUDITED)

For Federal  income tax purposes,  the following  information  is furnished with
respect to the  distributions  of the Fund during its fiscal year ended  October
31, 1997.

The Fund  designated a distribution  to shareholders of $ 1,153,345 as long-term
capital gain  dividends.  These amounts were reported on the 1996 U.S.  Treasury
Department Form 1099-DIV.

With respect to the dividends paid by the fund for the fiscal year ended October
31, 1997, none qualify for the corporate dividends received deduction.

Shareholders  will  received a 1997 U.S.  Treasury  Department  Form 1099-DIV in
January of 1998.  This will  reflect  the total of all  distributions  which are
taxable for the calendar year 1997.




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