HANCOCK JOHN BANK & THRIFT OPPORTUNITY FUND
N-30D, 1998-07-01
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- --------------------------------------------------------------------------------

                                SEMIANNUAL REPORT

                                [PHOTO OMITTTED]

                                 Bank and Thrift
                                  Opportunity
                                      Fund

                                 APRIL 30, 1998



                           [LOGO] JOHN HANCOCK FUNDS
                                  A Global Investment Management Firm

- --------------------------------------------------------------------------------
<PAGE>

                                    TRUSTEES
                             Edward J. Boudreau, Jr.
                                 James F. Carlin
                             William H. Cunningham*
                                Charles F. Fretz
                              Harold R. Hiser, Jr.
                                 Anne C. Hodsdon
                                Charles L. Ladner
                               Leo E. Linbeck, Jr.
                              Patricia P. McCarter*
                              Steven R. Pruchansky*
                               Richard S. Scipione
                      Lt. Gen. Norman H. Smith, USMC (Ret.)
                                 John P. Toolan
                         *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 and Chief Operating Officer
                                 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

                               INVESTMENT ADVISER
                           John Hancock Advisers, Inc.
                              101 Huntington Avenue
                        Boston, Massachusetts 02199-7603

                          CUSTODIAN, TRANSFER AGENT AND
                               DIVIDEND DISBURSER
                       State Street Bank and Trust Company
                               225 Franklin Street
                           Boston, Massachusetts 02110

                                  LEGAL COUNSEL
                                Hale and Dorr LLP
                                 60 State Street
                        Boston, Massachusetts 02109-1803


                   Listed New York Stock Exchange Symbol: BTO
                         John Hancock Closed-End Funds:
                                 1-800-843-0090

================================================================================
                               CHAIRMAN'S MESSAGE

DEAR FELLOW SHAREHOLDERS:

During the last  decade,  investors  have  become  used to seeing  stock  market
returns averaging 15% or so each year. In the past three years, the stock market
has treated us to a record run, producing annual returns in excess of 20%.

After such a long and  remarkable  performance,  many began this year  wondering
what the market would do for an encore in 1998.  The answer so far has been more
of the same. This achievement  continues to bolster many investors'  convictions
that the market will produce these results forever,  or, in the worst case, that
market declines will always be short-lived.  While the economy remains solid and
the  environment  favorable,  history and reason tell us it's a highly  unlikely
scenario.  

[A 1 1/4" x 1" photo of Edward J. Boudreau,  Jr.,  Chairman and Chief  Executive
Officer, flush right, next to third paragraph.]

This doesn't mean we know what the market will do next,  or that it's
riding  for a fall.  But  after  such a run,  even in this  "new  era" of strong
economic growth with low inflation, we believe it would be wise for investors to
set more realistic expectations. As we've said before, markets do indeed move in
two directions, even though we've seen "up" much more than "down" recently. Over
the long term,  the  market's  historical  results have been more in the 10% per
year range,  which is still a solid  result,  considering  it has been  produced
despite wars,  depressions and other social upheavals along the way. 

In addition to adjusting, or at least re-examining, expectations, now could also
be a good time to review with your investment  professional  how your assets are
diversified,  perhaps with an eye toward a more conservative  approach.  Stocks,
especially  with their outsized gains of the last three years,  might have grown
to represent a larger piece of your portfolio than you had originally  intended,
given your objectives, time horizon and risk level.

At John Hancock Funds,  our goal is to help you reach your financial  objectives
and maintain wealth.  One way we can do that is by helping you keep your feet on
the ground as you pursue your dreams.

Sincerely,

/s/ Edward J. Boudreau

EDWARD J. BOUDREAU, JR., CHAIRMAN AND CHIEF EXECUTIVE OFFICER

                                       2
<PAGE>

================================================================================

         By James K. Schmidt, CFA, Portfolio Management Team Leader and
             Thomas Finucane and Thomas Goggins, Portfolio Managers

                             John Hancock Bank and
                            Thrift Opportunity Fund

                 Bank stocks heat up with consolidation fever;
                 ---------------------------------------------
                       industry fundamentals are stellar
                       ---------------------------------

After some Asia-related  weakness in late 1997, U.S. financial markets continued
their  exuberant  ascent in 1998,  fueled by the powerful  combination of strong
economic growth and low inflation.  For the six months ended April 30, 1998, the
Standard & Poor's 500 Stock Index,  a commonly  used gauge of the broader  stock
market,  returned 22.49%,  including reinvested dividends.  As they have for the
last several  years,  large-company  stocks led the market's  charge.  

     Banks and other financial  stocks also performed well.  Mirroring the broad
market, the large  superregional and money center bank stocks outperformed their
smaller counterparts. For the six months ended April 30, 1998, John Hancock Bank
and Thrift  Opportunity  posted a very strong absolute total return of 20.96% at
net asset value.  That result was equal to the market's  performance  for all of
1997.  Because the Fund's  emphasis is on regional and community  banks,  rather
than on the larger  banks that  outperformed,  our results  were just behind the
average open-end financial services fund's return of 22.51%, according to Lipper
Analytical Services, Inc.

"The past six months have marked a period of frenzied merger activity..."

Performance review 

The single most important factor  contributing to the financial sector's success
is the ideal macroeconomic  environment.  

[A 2 1/4" x 3 3/4"  photo at bottom  of page of fund  management  team.  Caption
reads "Fund management team members (l-r): (standing) Jay Mckelvey, Tom Goggins,
and Tom Finucane, (seated) Lisa Welch, Jim Schmidt and Patricia Ouimet.]

                                       3
<PAGE>

================================================================================

             John Hancock Funds - Bank and Thrift Opportunity Fund


[Chart at the top of left hand column with the  heading  "Top Five Common  Stock
Holdings".  The chart lists five  holdings:  1.) National City Corp.  5.3%;  2.)
Summit Bancorp 4.3%; 3.) U.S.  Bancorp 4.2%; 4.)  NationsBankCorp.  4.0% and 5.)
First Union Corp.  3.6%.  A note below the chart reads "As a  percentage  of net
assets on April 30, 1998".]

"...earnings in 1998 have generally equaled or surpassed expectations."

A string of mergers  involving  banks of all size levels,  and healthy  earnings
reports  also  helped our  cause.  But these two  positives  were made even more
robust by the moderate,  sustainable  growth,  low inflation and stable interest
rates this  country has  experienced  over the last few years.  As long as these
economic  conditions  exist,  we believe the bank and thrift sector will deliver
the bottom-line  results and the consolidation wave will roll on.  

Consolidation results in  mega-banks  

The past six months have marked a period of frenzied merger activity in the bank
world. The highlight of late 1997 was the First Union-CoreStates  blockbuster, a
$17  billion   transaction.   However,   1998's  merger   activity  has  already
overshadowed  that. April 13 became the most dramatic date in the annals of bank
consolidation  as  two  mega-deals  were  announced.   

The  proposed  merger of  NationsBank  and  BankAmerica  would create by far the
largest bank in the United  States.  Despite  having  coast-to-coast  span and a
multiple of any other bank's market  share,  the "new"  BankAmerica  still falls
short of being a national  banking  institution.  It will still fail to cover 28
states and will have no  presence  at all in  populous  states such as New York,
Ohio,  and Michigan.  The "other" merger of April 13, which would have dominated
banking news on any other day, was between Banc One and First Chicago. This deal
will create a banking  company  with  approximately  $240 billion in assets that
will rank as the nation's sixth largest. These deals, coupled with the merger of
Citicorp  and  Travelers  into  Citigroup  that was  announced  a week  earlier,
substantially increase the pressure for industry consolidation. The U.S. banking
system is on a path to more closely resemble those of other developed economies,
where a handful  of  institutions  control  most of the  assets.  

The asset size  needed to join the  surviving  class of  mega-banks  keeps being
raised,  and in this sense the pressure is increased on remaining large banks to
gain scale.  Banks in the $30 billion to $80 billion range are no longer too big
to be acquisition  targets.  We think that the "mortality  rate" through mergers
will be  highest  among  banks in this  size  category.  Importantly,  the April
mega-mergers  resulted in no earnings  dilution to any of the banks involved and
had neutral or positive impacts on their stocks.  Thus, we think the market will
not discourage similar transactions.

At the same time,  there will also  continue  to be several  thousand  community
banks,  many of which will continue to thrive and find their  opportunities  are
actually enhanced by the large bank mergers.

[Table at bottom of left hand column  entitled  "Scorecard".  The header for the
left  column is  "Investment"  and the  header  for the right  column is "Recent
Performance...and  What's  Behind the  Numbers".  The first listing is Comerica,
Inc.  followed  by an up arrow with the phrase  "Market  recognized  fundamental
strengths". The second listing is Capital Corp. of the West followed by an arrow
pointing to the left and right with the phrase  "Questions about asset quality".
The third listing is Mercantile  Bancorp followed by a down arrow and the phrase
"Market mistrusts aggressive acquisition strategy". A note below the table reads
"See 'Schedule of Investments.' Investment holdings are subject to change."]

                                       4
<PAGE>

================================================================================

             John Hancock Funds - Bank and Thrift Opportunity Fund


[Bar chart at top of left hand column with the heading "Fund Performance". Under
the heading is a note that reads "For the six months ended April 30, 1998".  The
chart is scaled in  increments  of 5% with 0% at the  bottom and 25% at the top.
The first bar  represents  the 20.96% total return for the John Hancock Bank and
Thrift  Opportunity  Fund. The second bar represents the 22.51% total return for
the  average  open-end  financial  services  fund.  A note below the chart reads
"Total  returns for John  Hancock  Bank and Thrift  Opportunity  Fund are at net
asset value with all distributions  reinvested.  The average open-end  financial
services fund is tracked by Lipper Analytical Services, Inc.]

A byproduct of the Citigroup merger,  in our view, is increased  likelihood that
Congress  will  enact  financial  services  reform  legislation.  The bill under
consideration  will create financial  services holding  companies that could own
commercial banks, securities brokers, and insurance underwriters.  We think that
this change will prove to be more beneficial to other  financial  companies than
to banks,  which is why the banking  industry has not supported the legislation.
In 1997, the Fund  witnessed a record 22 of its holdings  announce  mergers;  in
1998 the merger tally stands at seven.  These deals were dispersed  across banks
of all sizes. We expect numerous  additional  transactions in the coming months.
We have  observed  often in the  past  that  mergers  beget  mergers,  and a few
landmark  deals  give  other   managements   the  incentive  to  negotiate  like
transactions. The timing of such mergers is likely to be affected by the need to
revamp  computer  systems to be capable of properly  recognizing  and processing
dates when the new century arrives on January 1, 2000 (the "Y2K"  problem).  For
the next six months,  activity could increase as institutions scrambling to meet
their Y2K  deadlines  will be induced to strike  deals now and avoid the problem
totally. Subsequently, in early 1999, we could witness a brief hiatus in mergers
because systems would have to be combined perilously close to the magic date.

"...regional banks continue to represent attractive values..."

Earnings on track,  valuations attractive Following an enormously fruitful 1997,
earnings in 1998 have generally equaled or surpassed expectations. The continued
economic conditions that are so ideal for bank stocks have enabled our companies
to report  12%  year-over-year  earnings  growth in the first  quarter  of 1998.
Across  the gamut of banks and  thrifts,  loan  quality  is very  good,  margins
generally  remain  stable,  expense  controls  have  been  excellent  and  stock
repurchases   continue  to  counter  capital  build-up.   Decreasing  levels  of
write-offs and  delinquent  loans have lessened  earlier  worries about consumer
credit  quality.  In  addition,  the  Asian  economic  swoon and  gyrating  U.S.
long-term interest rates have had little effect on the broad underlying strength
of the domestic  economy.  Thus,  both loan demand and credit trends continue to
maintain a positive balance between quantity and quality.  Given our outlook for
continued  cooperation on the macro-economic  front, we believe the average bank
firm can show 10% plus earnings increases over 1997.

In  retrospect,  merger  speculation  caused some of our favorite  regional bank
stocks,  such as Fund holdings  Union  Planters  Corp.,  Mercantile  Bancorp and
Summit Bancorp, to become overvalued at the end of 1997. These stock prices have
since declined from their year-end level and are once again  reasonably  priced.
Indeed, bank stocks have become less expensive than

                                       5
<PAGE>

================================================================================

              John Hanock Funds - Bank and Thrift Opportunity Fund


they were  compared  to the overall  market.  As a group,  their  price-earnings
multiple  relative to the overall market declined from 80% at the end of 1997 to
the current  level of 73%.  That means bank stocks are 27% percent  cheaper than
the market as a whole.  We believe  that  regional  banks  continue to represent
attractive values, offering predictable, consistent earnings streams and ongoing
consolidation  potential for less than the price of the market's  average stock.

"...the seven-year-old U.S. economic expansion still has legs..."

Fund activity  
Overall,   the  Fund's  investment  focus  has  not  wavered.  We  seek  capital
appreciation  by holding a  portfolio  of small- and mid-cap  regional  bank and
thrift  stocks  that  have  healthy  fundamentals  and may  stand in the path of
consolidation.  Currently,  we see no need to overweight any specific geographic
regions,  because,  with the exception of Hawaii, every state is enjoying steady
growth.  Over  time,  the Fund has built up  substantial  positions  in  several
superregional  banks that were inherited  through mergers.  As market conditions
and  relative  valuations  dictate,  the Fund  will  continue  to  reduce  these
positions to maintain our focus on the regional banks.  In this period,  we took
advantage of their rising stock prices to reduce our holdings in NationsBank and
U.S.  Bancorp.  In addition,  we also have been reducing the Fund's  holdings in
savings and loans,  many of which have converted to public ownership and are now
buying back stock at attractive levels. We reinvested the money into some of the
regional and community  banks,  such as First Tennessee  National and Associated
Banc-Corp.,  when their stock  prices were  attractive  compared to their larger
counterparts.

Outlook  
Our outlook for bank stocks and the economy in general remains  upbeat.  As long
as the current  backdrop of solid economic  growth,  low interest rates and tame
inflation remains,  we believe the seven-year-old  U.S. economic expansion still
has legs and can go well into 1998 without producing  inflationary side effects.
This positive macroeconomic picture,  combined with continued bank mergers and a
favorable  regulatory  environment,  keeps us encouraged about the prospects for
bank and thrift stocks.

- --------------------------------------------------------------------------------
This commentary  reflects the views of the portfolio managers through the end of
the Fund's period discussed in this report.  Of course,  the managers' views are
subject to change as market and other  conditions  warrant. 

Sector investing is subject to different,  and sometimes greater, risks than the
market as a whole.

                                       6
<PAGE>

================================================================================
                              FINANCIAL STATEMENTS

             John Hancock Funds - Bank and Thrift Opportunity Fund

The Statement of Assets and  Liabilities  is the Fund's  balance sheet and shows
the value of what the Fund owns, is due and owes on April 30, 1998.  You'll also
find the net asset value for each common share as of that date.

Statement of Assets and Liabilities
April 30, 1998 (Unaudited)
- --------------------------------------------------------------------------------
Assets:
Investments at value -D Note C:
Common stocks and warrant
  (cost- $381,242,350) ................                          $1,115,927,201
Preferred stocks (cost - $11,225,000)..                              13,770,250
Bonds (cost - $20,882,875) ............                              22,124,500
Short-term investments 
  (cost - $66,845,167) ................                              66,845,167
                                                                 --------------
                                                                  1,218,667,118
Cash ..................................                                  26,838
Receivable for investments sold .......                               7,456,531
Interest receivable ...................                                 541,402
Dividends receivable ..................                               3,137,979
Deferred organization expenses - 
 Note A ...............................                                  21,114
Other assets ..........................                                  46,179
                                                                 --------------
          Total Assets ................                           1,229,897,161
          ---------------------------------------------------------------------

Liabilities:
Payable for investments purchased .....                               6,196,614
Payable to John Hancock Advisers, Inc.
 and affiliates - Note B ..............                               1,339,222
                                                                 --------------
          Total Liabilities ...........                               7,535,836
          ---------------------------------------------------------------------

Net Assets:
Capital paid-in .......................                             435,267,021
Accumulated net realized gain on 
investments ...........................                              43,879,363
Net unrealized appreciation of 
investments ...........................                             738,477,603
Undistributed net investment 
income ................................                               4,737,338
                                                                 --------------
          Net Assets ..................                          $1,222,361,325
          =====================================================================

Net Asset Value Per Share:
(Based on 88,400,000 shares of beneficial
interest outstanding -D unlimited number of
shares authorized with no par value)...                                  $13.83
===============================================================================


The Statement of Operations summarizes the Fund's investment
income earned and expenses incurred in operating the Fund. 
It also shows net gains for the period stated.

Statement of Operations
Six months ended April 30, 1998 (Unaudited)
- --------------------------------------------------------------------------------
Investment Income:
 Dividends (including $449,724 received from affiliated
 issuers and net of foreign withholding taxes of
 $20,729) .............................                             $11,466,776
Interest ..............................                               2,709,831
                                                                 --------------
                                                                     14,176,607
                                                                 --------------
Expenses:
Investment management fee- Note B .....                               6,315,425
Administration fee- Note B ............                               1,372,919
New York Stock Exchange fee ...........                                 115,342
Printing ..............................                                  80,963
Custodian fee .........................                                  80,392
Trustees' fees ........................                                  40,905
Auditing fee ..........................                                  17,447
Transfer agent fee ....................                                  13,622
Miscellaneous .........................                                  12,324
Legal fees ............................                                   8,653
Organization expenses- Note A .........                                   7,911
                                                                 --------------
          Total Expenses .............                                8,065,903
          ---------------------------------------------------------------------
          Net Investment Income ......                                6,110,704
          ---------------------------------------------------------------------

Realized and Unrealized Gain on Investments:
 Net realized gain on investments sold
  (including $213,875 on sales of investments
  in affiliated issuers) .............                               43,879,722
Change in net unrealized appreciation/depreciation
 of investments ......................                              175,985,947
                                                                 --------------
          Net Realized and Unrealized
          Gain on Investments ........                              219,865,669
          ---------------------------------------------------------------------
          Net Increase in Net Assets
          Resulting from Operations ..                             $225,976,373
          =====================================================================

                       SEE NOTES TO FINANCIAL STATEMENTS.
                                       7


<PAGE>

================================================================================
                             FINANCIAL STATEMENTS

             John Hancock Funds - Bank and Thrift Opportunity Fund

Statement of Changes in Net Assets
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>

                                                                                SIX MONTHS ENDED
                                                                YEAR ENDED       APRIL 30, 1998
                                                             OCTOBER 31, 1997      (UNAUDITED)
                                                              ----------------  ----------------
     <S>                                                             <C>                 <C>
Increase (Decrease) in Net Assets:
From Operations:
  Net investment income ...................................      $12,354,294          $6,110,704
  Net realized gain on investments sold ...................       52,635,494          43,879,722
  Change in net unrealized appreciation/
  depreciation of investments .............................      308,986,988         175,985,947
                                                              --------------      --------------
   Net Increase in Net Assets Resulting 
   from Operations ........................................      373,976,776         225,976,373
                                                              --------------      --------------
Distributions to Shareholders:
  Dividends from net investment income ($0.0297 and 
  $0.1400 per share, respectively) ........................       (2,629,876)        (12,375,469)
  Distributions from net realized 
  gain on investments sold ($0.0333 and 
  $0.5955 per share, respectively) ........................       (2,946,969)        (52,637,780)
                                                              --------------      --------------
  Total Distributions to Shareholders .....................       (5,576,845)        (65,013,249)
                                                              --------------      --------------
From Fund Share Transactions - Net:*.......................       (8,677,032)                -   
                                                              --------------      --------------
Net Assets:
  Beginning of period .....................................      701,675,302       1,061,398,201
                                                              --------------      --------------
End of period (including undistributed 
net investment income of $11,002,103 
and $4,737,338, respectively) .............................   $1,061,398,201      $1,222,361,325
                                                              ==============      ==============
* Analysis of Fund Share Transactions:
</TABLE>

<TABLE>  
<CAPTION>                                                                

                                                                           SIX MONTHS ENDED
                                                YEAR ENDED                   APRIL 30, 1998
                                            OCTOBER 31, 1997                   (UNAUDITED)
                                          -------------------             -------------------
                                           SHARES      AMOUNT              SHARES      AMOUNT
                                          -------     -------             --------    -------
     <S>                                    <C>        <C>                    <C>        <C>    
Shares outstanding, beginning 
of period ........................       9,588,400   $443,944,053        88,400,000  $435,267,021
Less shares repurchased ..........      (1,188,400)    (8,677,032)            -            -
Shares outstanding, end                 -----------  -------------       ----------   -----------
of period ........................      88,400,000   $435,267,021        88,400,000  $435,267,021
                                        ==========   ============        ==========   ===========
</TABLE>                 


The  Statement  of Changes  in Net Assets  shows how the value of the Fund's net
assets has changed since the end of the previous period. The difference reflects
earnings less expenses,  any investment gains and losses,  distributions paid to
shareholders and any increase or decrease in money shareholders  invested in the
Fund.  The footnote  illustrates  the number of Fund shares sold during the last
two periods, along with the corresponding dollar value.

                       SEE NOTES TO FINANCIAL STATEMENTS.
                                       8
<PAGE>

================================================================================
                             FINANCIAL STATEMENTS

             John Hancock Funds - Bank and Thrift Opportunity Fund
<TABLE>
<CAPTION>

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:
- ------------------------------------------------------------------------------------------------------------------------------------
 
                                             FOR THE PERIOD FROM AUGUST 23, 1994        YEAR ENDED OCTOBER 31,      SIX MONTHS ENDED
                                                  (COMMENCEMENT OF OPERATIONS)       ------------------------------   APRIL 30, 1998
                                                      TO OCTOBER 31, 1994              1995       1996       1997        (UNAUDITED)
                                                      -------------------            --------   --------   --------       --------
     <S>                                                     <C>                 <C>       <C>       <C>       <C>
Per Share Operating Performance(1)
Net Asset Value, Beginning of Period .....                   $5.00                     $4.95      $6.62       $7.83        $12.01
                                                          --------                  --------    -------      ------       -------
Net Investment Income ....................                    0.03                      0.13       0.14        0.14          0.07
Net Realized and Unrealized Gain                                                                         
(Loss) on Investments ....................                   (0.07)                     1.60       1.64        4.08          2.49
                                                          --------                  --------    -------     -------       -------
Total from Investment Operations .........                   (0.04)                     1.73       1.78        4.22          2.56
                                                          --------                  --------    -------     -------       -------
Less Distributions:                                                                                      
Dividends from Net Investment Income......                    -                        (0.06)     (0.23)      (0.03)        (0.14)
Distributions from Net Realized Gain                                                                     
on Investments Sold ......................                    -                          -        (0.38)      (0.03)        (0.60)
                                                          --------                  --------    -------     -------       -------
Total Distributions ......................                    -                        (0.06)     (0.61)      (0.06)        (0.74)
                                                          --------                  --------    -------     -------       -------
Common Shares Offering Costs .............                   (0.01)                      -          -           -             -
                                                          --------                  --------    -------     -------       -------
Increase due to Purchase of Bank and                                                                     
Thrift Opportunity Fund Stock at less                                                                    
than Net Asset Value .....................                    -                          -         0.04        0.02           -
                                                          --------                  --------    -------     -------       -------
Net Asset Value, End of Period ...........                   $4.95                     $6.62      $7.83      $12.01        $13.83
                                                          ========                  ========    =======    ========       =======
Per Share Market Value, End of Period ....                   $4.50                     $5.69      $6.75      $10.64        $13.25
                                                          ========                  ========    =======    ========       =======
Total Investment Return at Market Value...                 (10.00%)(3)                27.91%     29.78%      58.95%        30.80%(3)
                                                                                                         
Ratios and Supplemental Data                                                                             
Net Assets, End of Period (000s omitted)..                $455,656                  $608,724   $701,675  $1,061,398    $1,222,361
Ratio of Expenses to Average Net Assets..                    1.51%(2)                  1.49%      1.50%       1.45%         1.47%(2)
Ratio of Net Investment Income to                                                                        
Average Net Assets ......................                    3.22%(2)                  2.22%      1.96%       1.42%         1.08%(2)
Portfolio Turnover Rate ................                        0%                        8%        13%          9%            4%
                                                                                                        
(1) All per share  amounts and net asset  values have been  restated to reflect
    the four-for-one stock split effective December 2, 1997.
(2) Annualized.
(3) Not annualized.
</TABLE>

The Financial  Highlights  summarizes  the impact of the following  factors on a
single  share  for each  period  indicated:  the net  investment  income,  gains
(losses),  distributions  and total investment  return of the Fund. It shows how
the Fund's net asset value for a share has changed since the end of the previous
period.  Additionally,  important  relationships between some items presented in
the financial statements are expressed in ratio form.

                       SEE NOTES TO FINANCIAL STATEMENTS.
                                       9
<PAGE>

================================================================================
                             FINANCIAL STATEMENTS

             John Hancock Funds - Bank and Thrift Opportunity Fund

Schedule of Investments
April 30, 1998 (Unaudited)
- --------------------------------------------------------------------------------
The Schedule of Investments  is a complete list of all  securities  owned by the
Bank and Thrift  Opportunity Fund on April 30, 1998. It's divided into four main
categories:  common stocks and warrant,  preferred stocks,  bonds and short-term
investments.  The common stocks and preferred  stocks are further broken down by
industry  groups.  Short-term  investments,  which  represent  the Fund's "cash"
position, are listed last.

                                                                        MARKET
ISSUER, DESCRIPTION                               NUMBER OF SHARES      VALUE
- -------------------                               ----------------      -----
COMMON STOCKS AND WARRANT  
Banks - Foreign  (2.24%)
Allied  Irish Banks PLC,
American Depositary Receipts (Ireland).......         79,000          $6,557,000
Oriental Financial Group (Puerto Rico).......         11,100     `       462,038
Popular, Inc. (Puerto Rico)..................        290,000          20,372,500
                                                                     -----------
                                                                      27,391,538
                                                                     -----------
Superregional Banks (14.08%)
First Union Corp. (NC) ......................        723,125          43,658,672
Fleet Financial Group, Inc. (MA).............        235,206          20,315,918
NationsBank Corp. (NC) ......................        639,610          48,450,457
Norwest Corp. (MN) ..........................        528,102          20,959,048
PNC Bank Corp. (PA)..........................        641,500          38,770,656
                                                                     -----------
                                                                     172,154,751
                                                                     -----------
Regional Banks (61.40%)
ABC Bancorp. (GA)............................         59,500           1,033,813
Alabama National Bancorp. (AL) ..............        130,000           4,160,000
American Bancorp. (WV) ......................         35,000             883,750
American Bancshares, Inc.* (FL) .............         64,500             838,500
Associated Banc-Corp. (WI)...................         71,036           3,729,390
BancFirst Corp. (OK) ........................         72,500           3,262,500
BancFirst Ohio Corp. (OH)....................         41,000           2,121,750
BancorpSouth, Inc. (MS) .....................         59,000           2,629,187
Bank of Rhode Island * (RI) .................         20,500             366,438
Bank of the Ozarks, Inc. (AR) ...............         60,000           2,085,000
Banknorth Group, Inc. (VT) ..................        126,000           4,567,500
BB&T Corp. (NC) .............................        528,880          35,567,180
BCB Financial Services Corp. (PA)............         27,500             821,563
Beverly Bancorp., Inc. (IL) .................         45,150           1,179,544
Beverly National Corp. (MA) .................         50,000           1,025,000
BNCCorp, Inc.* (ND)..........................         57,500          $1,135,625
Broad National Bancorp. (NJ).................         96,139           2,042,954
BT Financial Corp. (PA) .....................         18,950           1,099,100
BYL Bancorp. (CA) ...........................        110,000           2,392,500
California State Bank (CA) ..................         83,200           4,305,600
Cape Cod Bank & Trust Co. (MA) ..............         67,500           2,835,000
Capital Corp. of the West * (CA) ............         57,000             812,250
Carolina First Corp. (SC) ...................         43,890           1,272,810
CCB Financial Corp. (NC) ....................        110,025          11,965,219
Centura Banks, Inc. (NC) ....................         82,500           5,940,000
Century Financial Corp. (PA) ................         70,000           1,925,000
Chittenden Corp. (VT) .......................         83,827           3,143,512
City National Corp. (CA) ....................         44,977           1,672,582
CNB Bancshares, Inc. (IN)....................         44,963           2,203,187
Colonial BancGroup, Inc. (AL)................        756,500          27,139,437
Columbia Bancorp. (MD) ......................         53,000           1,934,500
Comerica, Inc. (MI) .........................        257,250          17,219,672
Commercial Bankshares, Inc. (FL).............         40,110             975,174
Commonwealth Bankshares, Inc.* (VA) .........         34,523             517,845
Community Banks, Inc. (PA) ..................         34,650           1,394,663
Community Bankshares, Inc.  (VA) ............         38,162           1,106,698
Compass Bancshares, Inc. (AL) ...............        543,905          26,379,392
Cowlitz Bancorp. * (WA) .....................         42,500             584,375
Crestar Financial Corp. (VA) ................        569,076          34,037,858
Desert Community Bank (CA) ..................         49,500           1,621,125
DNB Financial Corp. (PA) ....................         47,478           1,637,991
Empire Banc Corp. (MI) ......................         21,126           1,151,367
Evergreen Bancorp., Inc. (NY) ...............         54,800           1,602,900
F & M National Corp.* (VA) ..................         16,000             516,000
First American Corp. (TN) ...................        644,200          31,767,112
First Commerce Corp. (LA) ...................        360,000          29,295,000
First Financial Corp. (RI) ..................         84,000           1,407,000
First Hawaiian, Inc. (HI) ...................         47,000           1,844,750
First Security Corp. (UT) ...................        391,250           9,585,625
First State Bancorp. (NM)....................         82,625           1,993,328
First Tennessee National Corp. (TN) .........        241,400           8,313,212
First Victoria National Bank (TX) ...........         48,100           1,984,125
Firstar Corp. (WI) ..........................        275,352          10,274,071
F.N.B.  Corp. (PA) ..........................         45,166           1,682,434
FNB Bankshares (ME) .........................         20,780             709,014
FNB Financial Services Corp. (NC) ...........         40,000             930,000

                       SEE NOTES TO FINANCIAL STATEMENTS.

                                       10
<PAGE>

================================================================================
                             FINANCIAL STATEMENTS

             John Hancock Funds - Bank and Thrift Opportunity Fund

                                                                       MARKET
ISSUER, DESCRIPTION                               NUMBER OF SHARES      VALUE
- -------------------                               ----------------      -----
Regional Banks (continued)
FNB Rochester Corp. (NY) ....................         24,500            $496,125
Harleysville National Corp. (PA).............         46,000           1,937,750
Imperial Bancorp.* (CA) .....................        196,657           5,764,508
Independent Bankshares, Inc. (TX) ...........         32,500             593,125
Keystone Financial, Inc. (PA) ...............        129,850           5,064,150
Magna Group, Inc. (MO) ......................        115,500           6,828,937
Mahaska Investment Co. (IA) .................        249,171           5,481,762
Mahoning National Bancorp. (OH) .............         68,600           2,606,800
Marathon Financial Corp. (VA) ...............         15,000             125,625
Mercantile Bancorp., Inc. (MO) ..............        502,450          27,823,169
MetroBanCorp. (IN) ..........................         51,450             546,656
Midwest Banc Holdings, Inc. (IL).............         45,000             866,250
Mississippi Valley Bancshares, Inc. (MO).....         92,500           3,754,922
National City Corp. (OH) ....................        929,340          64,356,795
New England Community Bancorp.
 (Class A) (CT) .............................        208,500           5,160,375
North Fork Bancorp., Inc. (NY) ..............        234,100           8,690,962
Old Kent Financial Corp. (MI) ...............        361,454          14,051,524
One Valley Bancorp., Inc. (WV) ..............        134,590           5,232,186
Pacific Century Financial Corp. (HI) ........        602,500          14,874,219
Prime Bancshares, Inc.* (TX).................         13,500             361,125
Provident Bankshares Corp. (MD) .............        338,343          10,996,147
Regions Financial Corp. (AL).................        174,912           7,630,536
Riggs National Corp. (DC) ...................         55,000           1,584,688
Salem Bank & Trust (VA) .....................         44,990             877,305
Santa Barbara Bancorp. (CA) .................         45,000           1,260,000
Security Bank Corp.* (VA)....................         31,000             372,000
Shore Financial Corp.* (VA) .................         17,250             213,469
Six Rivers National Bank* (CA) ..............         33,500             640,688
Southtrust Corp. (AL) .......................        720,000          30,735,000
Southwest Bancorp. of Texas, Inc.* (TX) .....         98,990           3,959,600
Southwest Bancorp., Inc. (OK) ...............         10,500             330,750
Summit Bancorp. (NJ) ........................      1,038,305          52,045,038
Summit Bancshares, Inc. (TX) ................        227,400           5,102,287
Sun Bancorp., Inc. * (NJ) ...................        154,030           4,851,945
Surety Capital Corp.* (TX) ..................        253,700           1,363,638
TCF Financial Corp. (MN) ....................         50,008           1,628,386
Tehama Bancorp. (CA) ........................         56,552             940,177
Texas Regional Bancshares, Inc.
(Class A) (TX) ..............................         44,750           1,476,750
TriCo Bancshares (CA) .......................         20,500             630,375
UCBH Holdings, Inc.*  (CA) (r)...............        133,333           1,999,995
Union Planters Corp. (TN) ...................        706,975          43,478,962
United Security Bancorp.* (WA) ..............        172,215           3,853,311
Univest Corp. (PA) ..........................         25,000           1,762,500
U.S. Bancorp. (OR) ..........................        399,828          50,778,156
Regional Banks (continued)
U.S. Trust Corp. (NY) .......................         52,000          $3,692,000
Vermont Financial Services Corp. (VT)........         78,000           2,281,500
VRB Bancorp. (OR) ...........................         32,500             357,500
West Coast Bancorp. (OR) ....................         91,280           2,384,690
Western Bancorp. (CA) .......................         11,000             472,313
Whitney Holding Corp. (LA) ..................        148,000           9,009,500
Yardville National Bank (NJ) ................         98,400           1,820,400
Zions Bancorp. (UT) .........................         52,875           2,703,234
                                                                     -----------
                                                                     750,470,927
                                                                     ===========
Thrifts (11.67%)
Bank Plus Corp.* (CA) .......................         36,358             511,284
Bank West Financial Corp. (MI) ..............        168,000           2,373,000
BostonFed Bancorp., Inc. (MA) ...............        106,000           2,583,750
Cameron Financial Corp. (MO).................         75,000           1,584,375
CitFed Bancorp, Inc. (OH) ...................         48,000           2,544,000
Commercial Federal Corp. (NE) ...............         69,758           2,528,727
Community Financial Corp. (IL) ..............         20,000             460,000
CSB Financial Group, Inc.* (IL) .............         10,000             136,250
Dime  Bancorp.,  Inc. (NY) ..................         24,500             751,844
Financial Bancorp., Inc. (NY) ...............         70,000           1,855,000
First Colorado Bancorp., Inc. (CO)...........         96,000           2,808,000
First Defiance Financial Corp. (OH)..........         90,885           1,363,275
First Federal Capital Corp. (WI) ............         31,000           1,100,500
First Keystone Financial, Inc. (PA) .........         40,000             825,000
First SecurityFed Financial, Inc.* (IL) .....         65,000           1,088,750
First Source Bancorp., Inc. (NJ).............         75,000             796,875
GA Financial, Inc. (PA) .....................         72,500           1,431,875
Golden State Bancorp., Inc.* (CA)............         33,000           1,287,000
GreenPoint Financial Corp. (NY) .............        630,000          25,003,125
Guaranty Financial Corp. (VA)................         30,000             465,000
Highland Bancorp., Inc. (CA) ................         79,167           3,245,847
Hingham Institute for Savings (MA)...........         60,000           2,115,000
HMN Financial, Inc.* (MN) ...................         36,500             976,375
InterWest Bancorp., Inc. (WA) ...............         21,900             973,181
ISB Financial Corp. (LA) ....................        120,000           3,420,000
Lawrence Savings Bank* (MA) .................         70,000           1,242,500
Little Falls Bancorp., Inc. (NJ) ............        105,000           2,231,250
Local Financial Corp. (DE) (R) ..............        310,000           4,030,000
Long Island Bancorp., Inc. (NY)..............        174,200          11,497,200
New Hampshire Thrift Bancshares, Inc.
(NH) ........................................         25,000             515,625
North Central Bancshares, Inc. (IA) .........         55,000           1,326,875
Northwest Equity Corp. (WI) .................         61,000           1,265,750
Pamrapo Bancorp., Inc. (NJ) .................         86,000           2,408,000
Patriot Bank Corp. (PA) .....................         51,600             915,900

                       SEE NOTES TO FINANCIAL STATEMENTS.
                                       11
<PAGE>

================================================================================
                             FINANCIAL STATEMENTS

             John Hancock Funds - Bank and Thrift Opportunity Fund

                                                                        MARKET
ISSUER, DESCRIPTION                               NUMBER OF SHARES      VALUE
- -------------------                               ----------------      -----
Thrifts (continued)
PennFed Financial Services, Inc. (NJ)........        611,000         $10,921,625
PeopleOs Bancshares, Inc. (MA)...............         50,000           1,337,500
Peoples Heritage Financial Group, Inc. (ME)..         59,854           2,887,956
Pittsburgh Home Financial Corp. (PA).........        100,000           1,800,000
Quaker City Bancorp., Inc.* (CA) ............         80,000           1,810,000
St. Landry Financial Corp.* (LA).............         25,000             443,750
Scotland Bancorp., Inc. (NC).................         22,500             202,500
SFC Acquisition Corp. (AR) (r) ..............        150,000           1,500,000
SGV Bancorp., Inc.* (CA) ....................         20,000             360,000
SIS Bancorp., Inc. (MA) .....................         92,000           3,933,000
Southern Missouri Bancorp., Inc. (MO)........         40,700             854,700
Sovereign Bancorp., Inc. (PA) ...............         15,688             296,111
Stone Street Bancorp., Inc. (NC) ............          3,500              70,438
Sturgis Federal Savings Bank (MI) ...........         40,500           1,316,250
Teche Holding Co. (LA) ......................         80,000           1,675,000
Warren Bancorp., Inc. (MA) ..................         70,000           1,925,000
Washington Mutual, Inc. (WA).................        222,300          15,574,894
Wells Financial Corp.* (MN) .................        122,000           2,592,500
WesterFed Financial Corp. (MT)...............        209,162           5,490,502
                                                                   -------------
                                                                     142,652,859
                                                                   -------------
Other (1.31%)
Capital One Financial Corp. (VA) ............        167,000          16,042,438
Core Cap, Inc.* (Class A) (NY) (r)...........            500              10,000
                                                                    ------------
                                                                      16,052,438
                                                                   -------------
WARRANT (0.59%)
Golden State Bancorp., Inc.* (CA) ...........        265,000           7,204,688
                                                                   -------------
         TOTAL COMMON STOCKS
         AND WARRANT
         (Cost $381,242,350)                         (91.29%)      1,115,927,201
                                                  ----------       -------------
PREFERRED STOCKS
Banks & Thrifts (1.13%)
Astoria Financial Corp., Ser B, 12.00%
(NY) ........................................         50,000           1,650,000
Chevy Chase Savings,  13.00% (MD)............         55,000           1,705,000
Community Bank, Ser B, 13.00%(CA)............         21,000             582,750
First Preferred  Capital I, 9.25% (MO).......         50,000           1,337,500
IFC Capital Trust I, 9.25% (IN) .............         40,000           1,075,000
Matewan  BancShares,  Inc., Ser A, 
7.50% (WV) ..................................         25,000             737,500
MVBI Capital  Trust,  7.46% ** (MO) .........         40,000           1,000,000
Riggs National Corp.,  Ser B, 10.75% (DC)....         93,000           2,557,500
Sovereign  Bancorp., Ser B, 6.25% (PA).......         15,000           2,040,000
Sterling  Bancshares  Capital Trust I,
9.28% (TX) ..................................         20,000             535,000
Banks & Thrifts (continued) VBC Capital I,
9.50% (CO) ..................................         20,000            $537,500
                                                                   -------------
                                                                      13,757,750
                                                                   -------------
Other (0.00%)
Core Cap, Inc., Ser A/I, 10.00% (NY) (r) ....            500              12,500
                                                                   -------------
         TOTAL PREFERRED STOCKS
         (Cost $11,225,000) .................         (1.13%)         13,770,250
                                                  ----------       -------------

                                             INTEREST      PAR VALUE     MARKET
                                               RATE      (000s OMITTED)   VALUE
                                               ----      --------------   -----
BONDS
BFC Capital Trust I,
Capital Securities, Ser A,
01-15-27 ....................................  9.650%        $250        274,375
CENFED Financial Corp. (R),
Sr Note 12-15-01 ............................ 11.170        3,500      3,880,625
Coastal Bancorp., Inc.,
Sr Note 06-30-02 ............................ 10.000        3,000      3,090,000
CSBI Capital Trust I (R),
Sub Cap Income, Ser A,
06-06-27 .................................... 11.750          770        816,200
Dime Bancorp.,
Sr Note 11-15-05 ............................ 10.500        3,690      3,948,300
Fidelity Federal Bancorp.,
Sub Note 06-01-05 ........................... 10.000        1,000        980,000
First Federal Financial Corp.,
Note 10-01-04 ............................... 11.750        2,000      2,210,000
MAF Bancorp., Inc.,
Sub Note 09-30-05 ...........................  8.320        1,500      1,485,000
ML Capital Trust I,
Capital Securities 03-01-27 .................  9.875        1,000      1,150,000
Ocwen Federal Bank,
Sub Deb 06-15-05 ............................ 12.000        1,000      1,110,000
WSFS Financial Corp.,
Sr Note 12-31-05 ............................ 11.000        3,000      3,180,000
                                                                   -------------
         TOTAL BONDS
         (Cost $20,882,875) .................              (1.81%)    22,124,500
                                                          -------  -------------

                       SEE NOTES TO FINANCIAL STATEMENTS.
                                       12
<PAGE>

================================================================================
                           FINANCIAL STATEMENTS

             John Hancock Funds - Bank and Thrift Opportunity Fund
  

                                         INTEREST      PAR VALUE      MARKET
                                           RATE      (000s OMITTED)   VALUE
                                           ----      --------------   -----

SHORT-TERM INVESTMENTS
Certificates of Deposit (0.01%)
Deposits in Mutual Banks  ..............                                 $57,167
                                                                   -------------
Joint Repurchase Agreement (5.46%)
Investment in a joint repurchase
agreement transaction with
Toronto Dominion Securities
USA, Inc.-D Dated 04-30-98,
due 05-1-98 (Secured by
U.S. Treasury Notes,
5.00% thru 9.125%, due
02-15-99 thru 07-31-00)
- -DNote A ...............................  5.500%        $66,788       66,788,000
                                                                  --------------
                    TOTAL SHORT-TERM INVESTMENTS         (5.47%)      66,845,167
                                                                  --------------
                                TOTAL INVESTENTS        (99.70%)   1,218,667,118
                                                                  --------------
               OTHER ASSETS AND LIABILITIES, NET         (0.30%)       3,694,207
                                                                  --------------
                                TOTAL NET ASSETS       (100.00%)  $1,222,361,325
                                                                  ==============

NOTES TO SCHEDULE OF INVESTMENTS

*    Non-income producing security.
**   Floating rate effective April 30, 1998.
(R)  These  securities  are  exempt  from  registration  under  Rule 144A of the
     Securities  Act of  1933.  Such  securities  may  be  resold,  normally  to
     qualified  institutional  buyers, in transactions exempt from registration.
     Rule 144A securities amounted to $8,726,825 as of April 30, 1998.
(r)  The  securities  listed  below  are  direct  placement  securities  and are
     restricted as to resale.  The Fund has limited rights to registration under
     the  Securities  Act of 1933 with  respect to  restricted  securities  (not
     including Rule 144A securities). In certain circumstances the Fund may bear
     a portion of the cost of such registrations; otherwise, such costs would be
     borne by the issuer.  Additional information on these restricted securities
     is as follows:

<TABLE>
<CAPTION>

                                                                 MARKET       MARKET 
                                                                 VALUE AS A   VALUE 
                                                                 PERCENTAGE   AS OF 
                                ACQUISITION   ACQUISITION        OF FUND'S    APRIL 30, 
                                   DATE          COST            NET ASSETS   1998
                                   ----          ----            ----------   ----
   <S>                             <C>            <C>                 <C>      <C>
Core Cap, Inc.
(Common Stock) ................  10-31-97        $10,000           0.00%     $10,000
(Preferred Stock) .............  10-31-97         12,500           0.00       12,500
SFC Acquisition Corp. .........  03-30-98      1,500,000           0.12    1,500,000
UCBH Holdings, Inc. ...........  04-16-98      2,000,000           0.16    1,999,995

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.
                                       13
<PAGE>

================================================================================
                         NOTES TO FINANCIAL STATEMENTS

             John Hancock Funds - Bank and Thrift Opportunity Fund


(UNAUDITED)
NOTE A -
ACCOUNTING POLICIES
The John Hancock Bank and Thrift  Opportunity Fund (the "Fund") is a diversified
closed-end management investment company registered under the Investment Company
Act of 1940. To provide the initial capital of the Fund, John Hancock  Advisers,
Inc. (the "Adviser"), a wholly owned subsidiary of The Berkeley Financial Group,
Inc.,  purchased a total of 20,000 common shares for an aggregate purchase price
of $100,000 on August 8, 1994.  The Adviser was the sole holder of common shares
until the public offering was completed and the operations of the Fund commenced
on August 23, 1994. The Fund's primary investment objective is long-term capital
appreciation.  

On  November 7, 1997 the Board of Trustees of the Fund voted to split the shares
four for one,  effective  December 2, 1997.  All per share amounts and net asset
values have been restated to reflect the stock split.

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.

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,
Inc., may participate in a joint  repurchase  agreement  transaction.  Aggregate
cash  balances are invested in one or more large  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.

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 its  taxable  income,  including  any net  realized  gain on
investments, to its shareholders.  Therefore, no federal income tax provision is
required.

DIVIDENDS,  INTEREST AND DISTRIBUTIONS Dividend  income on investment securities
is recorded on the ex-dividend date. Interest income on investment securities is
recorded  on  the  accrual  basis.   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.

DISCOUNT ON  SECURITIES The  Fund accretes discount from par value on securities
purchased from either the date of issue or the date of purchase over the life of
the security, as required by the Internal Revenue Code.

ORGANIZATION  EXPENSES  Expenses incurred in connection with the organization of
the Fund have been  capitalized  and are being charged to the Fund's  operations
ratably over a five-year  period that began with the  commencement of operations
of the 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.

OPTIONS Listed  options  will be valued at the last  quoted  sales  price on the
exchange  on  which  they  are   primarily   traded.   Purchased   put  or  call
over-the-counter  options  will be valued  at the  average  of the "bid"  prices
obtained  from two  independent  brokers.  Written put or call  over-the-counter
options will be valued at the average of the "asked"  prices  obtained  from two
independent  brokers.  Upon the writing of a call or put option, an amount equal
to the premium  received by the Fund will be included in the Statement of Assets
and  Liabilities  as an asset and  corresponding  liability.  The  amount of the
liability  will be  subsequently  marked to market to reflect the current market
value of the written  option.  

                                       14
<PAGE>

================================================================================
                         NOTES TO FINANCIAL STATEMENTS

             John Hancock Funds - Bank and Thrift Opportunity Fund


The Fund may use option  contracts to manage its  exposure to the stock  market.
Writing puts and buying  calls will tend to increase the Fund's  exposure to the
underlying  instrument,  and buying puts and writing calls will tend to decrease
the  Fund's  exposure  to  the  underlying  instrument,   or  hedge  other  Fund
investments.

The maximum  exposure to loss for any  purchased  options will be limited to the
premium  initially  paid  for the  option.  In all  other  cases,  the  face (or
"notional")  amount of each contract at value will reflect the maximum  exposure
of the Fund in these  contracts,  but the actual exposure will be limited to the
change in value of the contract over the period the contract remains open.

Risks may also  arise if  counterparties  do not  perform  under the  contracts'
terms,  or if the Fund is unable to offset a contract with a  counterparty  on a
timely basis  ("liquidity  risk").  Exchange-traded  options have minimal credit
risk as the  exchanges  act as  counterparties  to each  transaction,  and  only
present liquidity risk in highly unusual market  conditions.  To minimize credit
and  liquidity  risks  in  over-the-counter  option  contracts,  the  Fund  will
continuously monitor the creditworthiness of all its counterparties.

At any particular time, except for purchased options,  market or credit risk may
involve amounts in excess of those reflected in the Fund's period-end  Statement
of Assets and Liabilities.

There were no written option transactions for the period ended April 30, 1998.

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 1.15% of the Fund's average weekly net asset value.

The Fund has also  entered  into an  administrative  agreement  with the Adviser
pursuant to which the Adviser provides certain administrative services on behalf
of the Fund. In return, the Fund has agreed to pay a monthly  administration fee
at an annual rate of 0.25% of the Fund's average weekly net asset value.

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 Adviser owns 20,000  shares of beneficial  interest of the Fund.  The
unaffiliated  Trustees may elect to defer for tax purposes their 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  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 April 30,
1998, the Fund's  investments to cover the deferred  compensation  liability had
unrealized appreciation of $5,877.

NOTE C - 
INVESTMENT  TRANSACTIONS 
Purchases  and  proceeds  from  sales  of  securities,   other  than  short-term
obligations,  during the year ended April 30, 1998,  aggregated  $42,930,671 and
$92,476,569, respectively.

The cost of investments  owned at April 30, 1998 for federal income tax purposes
was $480,195,392.

Gross  unrealized   appreciation  and  depreciation  of  investments  aggregated
$738,578,220   and   $106,494,   respectively,   resulting  in  net   unrealized
appreciation of $738,471,726.

NOTE D - CAPITAL 

In connection  with the Fund's initial public  offering in August 1994, the Fund
recorded  proceeds  of  $458,770,000,   net  of  estimated   offering  costs  of
$1,230,000, through the issuance of 92,000,000 common shares at $5.00 per share.
As of April 30,  1998,  the Fund had  incurred  $1,156,818  of  public  offering
expenses and had  adjusted  capital  paid-in for $73,182  which  represents  the
balance of  estimated  offering  costs  which the Fund does not expect to incur.
During the years ended October 31, 1996 and 1997, 2,431,600 shares and 1,188,400

                                       15

<PAGE>

================================================================================
                         NOTES TO FINANCIAL STATEMENTS

             John Hancock Funds - Bank and Thrift Opportunity Fund


shares, respectively, of the Fund's stock were purchased from stockholders at an
average  discount of 18.0% from net asset  value.  These shares were retired and
restored to the status of authorized but unissued shares.

NOTE E - 
TRANSACTIONS  IN SECURITIES OF AFFILIATED  ISSUERS
Affiliated  issuers, as defined by the Investment Company Act of 1940, are those
in  which  the  Fund's  holdings  of an  issuer  represent  5% or  more  of  the
outstanding   voting   securities  of  the  issuer.  A  summary  of  the  Fund's
transactions  in the  securities of these issuers  during the period ended April
30, 1998 is set forth below.

<TABLE>
<CAPTION>

                                                       ACQUISITIONS     DISPOSITIONS  
                                        BEGINNING   ---------------------------------  ENDING
                                        SHARE       SHARE             SHARE            SHARE    REALIZED    DIVIDEND   ENDING
AFFILIATE                               AMOUNT      AMOUNT   COST    AMOUNT   COST     AMOUNT   GAIN        INCOME     VALUE
- ----------------------------------------------------------------------------------------------------------------------------
     <S>                                <C>           <C>    <C>      <C>      <C>       <C>     <C>          <C>       <C>
Bank West Financial Corp. (MI)          112,000        -      $-        -       $-   168,000(1)     $-     $10,080   $2,373,000
Bank Yorba Linda (CA)                   110,000        -       -        -        -   110,000         -       5,500    2,392,500
First Financial Corp. (RI)               94,000        -       -   10,000   93,750    84,000    68,120       9,740    1,407,000
Mahaska Investment Co. (IA)             149,500        -       -        -        -   249,171(2)      -      67,784    5,481,762
MVBI Capital Trust (MO)                  40,000        -       -        -        -    40,000         -           -    1,000,000
Northwest Equity Corp. (WI)              61,000        -       -        -        -    61,000         -      18,910    1,265,750
Penn Fed Financial Services, Inc. (NJ)  305,500        -       -        -        -   611,000(4)      -      42,770   10,921,625
Pittsburgh Home Financial Corp. (PA)    100,000        -       -        -        -   100,000         -     262,000    1,800,000
St. Landry Financial Corp. (LA)          25,000        -       -        -        -    25,000         -           -      443,750
Surety Capital Corp. (TX)               296,800        -       -   43,100  140,075   253,700(3) 145,755          -            -
Wells Financial Corp. (MN)              122,000        -       -        -        -   122,000         -      32,940    2,592,500
                                                           -------         --------             --------   --------   ---------
                                                                       $- $233,825             $213,875   $449,724  $29,677,887
                                                                         =========              =======    =======   ========== 
(1)  Reflects  three-for-two  stock split as of December 3, 1997.  
(2)  Reflects five-for-three stock split as of November 12, 1997. 
(3) As of April 30, 1998, no longer an affiliated issuer. 
(4) Reflects two-for-one stock split as of February 11, 1998.
</TABLE>

                                       16

<PAGE>

================================================================================
                         NOTES TO FINANCIAL STATEMENTS

             John Hancock Funds - Bank and Thrift Opportunity Fund


SHAREHOLDER MEETING
On March 5, 1998, the Annual Meeting of John Hancock Bank and Thrift Opportunity
Fund (the  "Fund") was held to elect four  Trustees  and to ratify the action of
the Trustees in selecting  independent  auditors for the Fund. 

The shareholders  elected the following Trustees to serve until their respective
successors are duly elected and qualified, with the votes tabulated as follows:

                                        FOR        AUTHORITY WITHHELD
Edward J. Boudreau, Jr.              82,209,531         643,781
Anne C. Hodsdon                      82,172,651         680,661
Steven R. Pruchansky                 82,205,287         648,025
Norman H. Smith                      82,185,016         668,296

The shareholders also ratified the Trustees' selection of Deloitte
and Touche LLP as the Fund's  independent  auditors  for the fiscal  year ending
October 31, 1998, with the votes tabulated as follows:  82,011,104 FOR,  375,644
AGAINST and 466,653 ABSTAINING.

                                       17
<PAGE>

================================================================================

             John Hancock Funds - Bank and Thrift Opportunity Fund


INVESTMENT OBJECTIVE AND POLICY
John  Hancock  Bank and  Thrift  Opportunity  Fund is a  closed-end  diversified
management  investment  company,  shares of which were initially  offered to the
public  on  August  23,  1994 and are  publicly  traded  on the New  York  Stock
Exchange.  Its investment objective is long-term capital appreciation.  

DIVIDEND REINVESTMENT PLAN
The Fund provides  shareholders with a Dividend Reinvestment Plan, (the "Plan"),
which offers the  opportunity  to earn  compound  yields.  Each holder of Common
Shares will  automatically have all distributions of dividends and capital gains
reinvested by State Street Bank and Trust Company, 225 Franklin Street,  Boston,
Massachusetts  02110, as agent for holders of Common Shares pursuant to the Plan
(the "Plan Agent") unless an election is made to receive cash.  Each  registered
shareholder will receive from the Plan Agent an authorization  card to be signed
and  returned  if the  shareholder  elects  to  receive  distributions  from net
investment  income in cash or elects not to receive capital gains  distributions
in the form of a shares dividend. The Plan Agent will effect purchases of Common
Shares under the Plan in the open market. The Fund will not issue any new shares
in  connection  with the  Plan.  Holders  of  Common  Shares  who  elect  not to
participate  in the Plan will  receive all  distributions  in cash paid by check
mailed  directly to the  shareholder of record (or if the Common Shares are held
in street or other  nominee  name,  then to the  nominee) by the Plan Agent,  as
divided  disbursing agent.  Shareholders  whose shares are held in the name of a
broker or nominee or shareholders  transferring  such an account to a new broker
or nominee  should  contact the broker or nominee to  determine  whether and how
they may participate in the Plan.

The Plan Agent serves as agent for the holders of Common Shares in administering
the  Plan.  After  the  Fund  declares  a  dividend  or  makes a  capital  gains
distribution,  the Plan Agent will, as agent for the  participants,  receive the
cash payment and use it to buy Common Shares in the open market, on the New York
Stock Exchange or elsewhere,  for the participants'  accounts.  The price of the
shares will be the average  market price at which such shares were  purchased by
the Plan Agent.

Participants  in the Plan may withdraw from the Plan upon written  notice to the
Plan Agent.  Such withdrawal will be effective  immediately if received not less
than ten days prior to a dividend record date;  otherwise,  it will be effective
for all subsequent dividend record dates. When a participant  withdraws from the
Plan or upon  termination of the Plan as provided  below,  either a cash payment
will be made to the participant for the full value of the Common Shares credited
to the account upon  instruction by the  participant or  certificates  for whole
Common Shares credited to his or her account under the Plan will be issued and a
cash payment  will be made for any  fraction of a Common Share  credited to such
account. 

The Plan Agent  maintains each  shareholder's  account in the Plan and furnishes
monthly written  confirmations  of all  transactions in the accounts,  including
information  needed by the  shareholders  for personal  and tax records.  Common
Shares in the account of each Plan participant will be held by the Plan Agent in
non-certified  form in the name of the participant.  Proxy material  relating to
shareholders'  meetings of the Fund will include those shares  purchased as well
as shares held pursuant to the Plan.

In the case of shareholders,  such as banks,  brokers,  or nominees,  which hold
Common  Shares  for others who are the  beneficial  owners,  the Plan Agent will
administer  the Plan on the basis of the number of Common Shares  certified from
time to  time by the  record  shareholders  as  representing  the  total  amount
registered  in the  record  shareholder's  name  and  held  for the  account  of
beneficial  owners who are  participants  in the Plan.  Shares may be  purchased
through broker-dealers.

The Plan Agent's fees for the handling of  reinvestment  of dividends  and other
distributions  will be paid by the Fund.  Each  participant  will pay a pro rata
share of brokerage  commissions  incurred  with respect to the Plan Agent's open
market purchases in connection with the reinvestment of distributions. There are
no other  charges to  participants  for  reinvesting  dividends  or capital gain
distributions.

                                       18
<PAGE>

================================================================================

             John Hancock Funds - Bank and Thrift Opportunity Fund


Dividends and capital gains  distributions  are taxable whether received in cash
or reinvested in additional  Common Shares,  and the automatic  reinvestment  of
dividends and capital gain  distributions  will not relieve  participants of any
U.S. income tax that may be payable or required to be withheld on such dividends
or  distributions. 

Experience under the Plan may indicate that changes are desirable.  Accordingly,
the Fund  reserves  the right to amend or  terminate  the Plan as applied to any
distribution  paid  subsequent  to  written  notice  of the  change  sent to all
shareholders  of the  Fund at  least  90 days  before  the  record  date for the
dividend or distribution. The Plan also may be amended or terminated by the Plan
Agent with at least 90 days' written notice to all shareholders of the Fund. All
correspondence  concerning the Plan should be directed to the Plan Agent,  State
Street  Bank  and  Trust  Company,  at  P.O.  Box  8209,  Boston,  Massachusetts
02266-8209 (telephone 1-800-426-5523).

                                       19
<PAGE>


[LOGO] JOHN HANCOCK FUNDS                                      -----------------
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101 Huntington Avenue, Boston, MA  02199-7603                     U.S. Postage
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