HANCOCK JOHN BOND TRUST/
PRE 14A, 1998-09-15
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                                  SCHEDULE 14A
                                (Rule 14a -101)

                    INFORMATION REQUIRED IN PROXY STATEMENT

                              FILE NUMBER 811-3006

                            SCHEDULE 14A INFORMATION

          Proxy Statement Pursuant to Section 14(a) of the Securities
                    Exchange Act of 1934 (Amendment No. ___)

Filed by the Registrant                      [X]
Filed by a Party other than the Registrant   [ ]

Check the appropriate box:

[X]  Preliminary Proxy Statement             [ ]  Confidential. For Use of the
[ ]  Definitive Proxy Statement                   Commission Only (as permitted
[ ]  Definitive Additional Materials              by Rule 14a-6(e)(2))
[ ]  Soliciting Material Pursuant to
     Rule 14a-11(c) or Rule 14a-12

                            JOHN HANCOCK BOND TRUST
- --------------------------------------------------------------------------------
                (Name of Registrant as Specified in Its Charter)

                            JOHN HANCOCK BOND TRUST
- --------------------------------------------------------------------------------
    (Name of Person(s) Filing Proxy Statement, if Other Than the Registrant)

Payment of Filing Fee (Check the appropriate box):

[X]  No fee required.

<PAGE>

Dear Fellow Shareholder:

I am  writing  to ask for  your  vote on an  important  matter  concerning  your
investment in the John Hancock High Yield Bond Fund.

Many of the High Yield Bond Fund's current investment  restrictions,  which were
adopted at the Fund's inception in October 1987, reflect  regulatory  conditions
that are no longer in effect.  Many of these restrictions were formerly required
by state securities  commissions,  but the  requirements  were eliminated by the
National Securities Markets Improvement Act of 1996. The Securities and Exchange
Commission ("SEC") has changed its position on others.

After careful  consideration,  your Fund's Trustees have unanimously agreed that
modernizing the High Yield Bond Fund's fundamental investment  restrictions will
benefit  all  shareholders  by  providing  a  clearer  and more  concise  set of
restrictions  that reflect the current  legal and  investment  environment.  The
proposed changes are detailed in the enclosed proxy statement, and the rationale
for these  changes is  summarized  in the questions and answers on the following
page. I suggest you read both thoroughly before voting.

                        No Change in Investment Strategy

It is  important  to note  that  the  adoption  of these  simplified  investment
restrictions  will in no way alter  the John  Hancock  High  Yield  Bond  Fund's
objective of maximizing  current income without assuming undue risk. Also, while
the range of available  investment  opportunities and techniques may expand as a
result of these  amendments,  the  portfolio  management  team  currently has no
intention of changing its investment approach.

Your Vote Makes a Difference!
No matter what the size of your investment may be, your vote is critical. I urge
you to review  the  enclosed  materials  and to  complete,  sign and  return the
enclosed proxy ballot to us  immediately.  Your prompt  response will help avoid
the need for additional  mailings at your Fund's expense.  For your convenience,
we have provided a postage-paid envelope.

If you have any questions or need  additional  information,  please contact your
investment   professional  or  call  your  Customer  Service  Representative  at
1-800-225-5291, Monday through Friday between 8:00 A.M and 8:00 P.M.
Eastern Time. I thank you for your prompt vote on this matter.

                                            Sincerely,


                                            Edward  J. Boudreau, Jr.
                                            Chairman and CEO
<PAGE>

                 Q: What is the purpose of the proposed changes?


A:  Many of your  Fund's  current  investment  restrictions  reflect  regulatory
conditions  that are no longer in  effect.  The  proposed  changes  to your Fund
include  eliminating  these obsolete  restrictions  on issues such as oil or gas
exploration  investments.  The  proposal  also  calls  for  amending  investment
restrictions  to  reflect  the  Securities  and  Exchange  Commission's  current
position   on  issues  such  as   underwriting,   loans,   and   diversification
requirements. In addition the proposal seeks to re-designate certain fundamental
investment  restrictions  as  non-fundamental.  These  include  prohibiting  the
purchase of  securities  on margin and investing in companies for the purpose of
exercising  control.  Adopting these changes should not affect the way your fund
is managed,  but will give it a set of investment  restrictions that reflect the
current legal and investment environment.


               Q: What is a "fundamental" investment restriction?


A: To protect the rights of  shareholders,  federal laws require that investment
companies  adopt  fundamental  restrictions  with  respect to  certain  types of
investments  and  practices   pertaining  to  a  fund's   investment   strategy.
Fundamental  investment  restrictions can only be changed by a shareholder vote.
Non-fundamental  restrictions  further define a mutual fund's  policies and risk
profile, but can be altered by a fund's board of trustees.  Your Fund will still
have all the fundamental investment  restrictions required by federal law if the
proposed changes are adopted.


                 Q: Why are some of these restrictions outdated?


A:  Formerly  state  authorities  had the  ability to  regulate  the  investment
practices  of  investment   companies,   and  often  required  the  adoption  of
fundamental  restrictions  not  required by federal law.  These state  mandates,
however,  were not consistently  applied,  changed repeatedly and did not always
relate to the  underlying  objectives  and  policies  of  investment  companies.
Consequently,  state level  authority was eliminated by the National  Securities
Markets Improvements Act of 1996. Many of your Fund's restrictions still reflect
these obsolete regulations.


                Q: What are the benefits of the proposed changes?


Modernizing  the  investment   restrictions   will  give  your  Fund  additional
flexibility  to  respond  to  new  opportunities  in  the  evolving   high-yield
marketplace   that  match  your  Fund's   investment   objective  and  approach.
Simplifying your Fund's investment  restrictions will also provide a clearer and
more concise picture of the characteristics and risks associated with your Fund.


                                Q: How do I vote?


Most  shareholders  typically  vote by  completing,  signing and  returning  the
enclosed proxy card using the postage-paid  envelope provided.  If you prefer to
vote in person, you are cordially invited to attend a meeting of shareholders of
your  Fund,  which  will be held at 9:00  A.M.  on  December  9, 1998 at our 101
Huntington Avenue  headquarters in Boston,  Massachusetts.  If you vote now, you
will help avoid additonal solicitations at your Fund's expense.

<PAGE>

                        JOHN HANCOCK HIGH YIELD BOND FUND
                      (a series of John Hancock Bond Trust)
                              101 Huntington Avenue
                                Boston, MA 02199

                    NOTICE OF SPECIAL MEETING OF SHAREHOLDERS
                           TO BE HELD DECEMBER 9, 1998


This is the formal  agenda for your fund's  special  meeting.  It tells you what
matters will be voted on and the time and place of the meeting, in case you want
to attend in person.

To the shareholders of John Hancock High Yield Bond Fund:

A special  meeting of  shareholders  of your fund will be held at 101 Huntington
Avenue,  Boston,  Massachusetts  on  Wednesday,  December  9, 1998 at 9:00 a.m.,
Eastern time, to consider the following:

1(a)-(n).      A proposal to amend the fund's investment restrictions. Your
               board of trustees recommends that you vote FOR this proposal.

2.             Any other business that may properly come before the meeting.

Shareholders  of record as of the close of  business on  September  16, 1998 are
entitled to vote at the meeting and any related follow-up meetings.

Whether or not you expect to attend the meeting,  please complete and return the
enclosed proxy card. Please take a few minutes to vote now.

                                              By order of the board of trustees,
                                              Susan S. Newton
                                              Secretary

October 5, 1998

<PAGE>

                               PROXY STATEMENT OF
                        JOHN HANCOCK HIGH YIELD BOND FUND
                      (a series of John Hancock Bond Trust)

This proxy  statement  contains the information you should know before voting on
the proposals as summarized below.

High Yield Bond Fund will furnish  without charge a copy of its Annual Report to
any  shareholder  upon  request.  Shareholders  who want to obtain a copy of the
fund's report  should direct all written  requests to the attention of the fund,
101 Huntington Avenue,  Boston,  Massachusetts 02199 or should call John Hancock
Funds at 1-800-225-5291.

                                  INTRODUCTION

This  proxy  statement  is being used by the board of  trustees  of your fund to
solicit  proxies to be voted at a special  meeting of shareholders of your fund.
This meeting will be held at 101 Huntington  Avenue,  Boston,  Massachusetts  on
Wednesday,  December  9, 1998 at 9:00 a.m.,  eastern  time.  The  purpose of the
meeting is to consider:

1(a)-(n).      A proposal to amend the fund's investment restrictions.

2.             Any other business that may properly come before the meeting.

This  proxy  statement  and the  proxy  card are  being  mailed  to your  fund's
shareholders on or about October 5, 1998.

Who is Eligible to Vote?

Shareholders  of record on September 16, 1998 are entitled to attend and vote on
each proposal at the meeting or any adjourned meeting. Each share is entitled to
one vote. Shares represented by properly executed proxies, unless revoked before
or at the meeting, will be voted according to shareholders' instructions. If you
sign a proxy,  but do not fill in a vote,  your  shares will be voted to approve
the proposals.  If any other business comes before the meeting, your shares will
be voted at the discretion of the persons named as proxies.

<PAGE>

                           PROPOSALS 1(a) through 1(n)

                             AMENDMENT TO THE FUND'S
                             INVESTMENT RESTRICTIONS

         John Hancock Advisers,  Inc. (the "adviser") and your board of trustees
recommend  that  the  following   changes  be  made  to  modernize  your  fund's
fundamental investment restrictions. They recommend eliminating several obsolete
restrictions as well as amending and  redesignating as  non-fundamental a number
of other restrictions. The purpose of this proposal is to provide your fund with
a set of investment  restrictions  that reflect the current legal and investment
environment. We are asking you to vote on these changes because the restrictions
are fundamental and may be changed only with shareholder approval.

         The  Investment  Company Act of 1940 (the "1940 Act")  requires  mutual
funds to adopt  fundamental  investment  restrictions  covering certain types of
investment  practices.  However,  your  fund  is also  subject  to a  number  of
fundamental  restrictions  that are not  required  by the 1940 Act or any  other
current laws.  These  restrictions  were adopted in the past to reflect  certain
regulatory,  business  or  industry  conditions  which are no longer in  effect,
especially the "blue sky" laws formerly imposed by state securities regulations.
It is also recommended that some of the fundamental  restrictions be liberalized
to the  extent  permitted  under the 1940 Act in light of  current  interpretive
positions of the staff of the Securities and Exchange Commission (the "SEC").

         The adviser  expects that you will benefit from these proposed  changes
to the fund's  fundamental  investment  restrictions in several ways. First, the
high yield bond segment of the fixed income  security  marketplace  continues to
grow and evolve.  Innovative new products,  variations on existing  products and
new investment techniques are constantly being introduced. The adviser carefully
evaluates all new  investment  opportunities  to determine  whether any would be
suitable for the fund given its investment objective, policies and risk profile.
The  adviser  believes  that the  proposed  changes  to the  fund's  fundamental
restrictions  will provide the fund with additional  flexibility to respond more
quickly to new developments and changing trends in the marketplace  whenever the
adviser determines that a response is both appropriate and prudent.

         Second, the proposed changes to the fund's investment  restrictions are
designed  to  produce a clearer  and more  concise  set of  restrictions.  These
revised restrictions parallel the investment restrictions of other funds managed
by the adviser,  which will facilitate the adviser's  compliance efforts.  Also,
these revised

<PAGE>

restrictions  should assist investors in understanding the  characteristics  and
risks associated with this fund and will allow for more effective  comparison to
other mutual funds with similar investment objectives.

         Third, the proposed changes to the fund's fundamental  restrictions may
expand the range of investment  opportunities and techniques available to manage
the fund's portfolio. However, the fund has no current intention of changing its
actual investment strategies as a result of these amendments.  In addition,  the
fund's investment  objective of maximizing current income without assuming undue
risk remains the same.

                 Proposed Amendments to Investment Restrictions

         The table below sets forth the fund's current fundamental  restrictions
in the left hand column and the proposed amended  restrictions in the right hand
column.  The current  restrictions  are  presented in the same order as they are
listed  in  the  fund's  statement  of  additional   information.   The  amended
restrictions,  if approved, will be reordered in the fund's revised statement of
additional information.
<TABLE>
<CAPTION>
- ---------------- ---------------------------------------------        ---------------------------------------------

Proposal         Current Fundamental Restriction                               Amended Fundamental Restriction
- ---------------- ---------------------------------------------        ---------------------------------------------
<S>              <C>                                                      <C>
1(a)             The Fund may not borrow money in an amount in        Amended as follows: The fund may not borrow  
                 excess of 33-1/3% of its total assets, and           money, except: (i) for temporary or          
                 then only as a temporary measure for                 short-term purposes or for the clearance of  
                 extraordinary or emergency purposes (except          transactions in amounts not to exceed 33 1/3%
                 that it may enter into a reverse repurchase          of the value of the fund's total assets      
                 agreement within the limits described in the         (including the amount borrowed) taken at     
                 Prospectus or this Statement of Additional           market value; (ii) in connection with the    
                 Information), or pledge, mortgage or                 redemption of fund shares or to finance      
                 hypothecate an amount of its assets (taken at        failed settlements of portfolio trades       
                 market value) in excess of 15% of its total          without immediately liquidating portfolio    
                 assets, in each case taken at the lower of           securities or other assets; (iii) in order to
                 cost or market value. For the purpose of this        fulfill commitments or plans to purchase     
                 restriction, collateral arrangements with            additional securities pending the anticipated
                 respect to options, futures contracts,               sale of other portfolio securities or assets;
                 options on futures contracts and collateral          (iv) in connection with entering into reverse
                 arrangements with respect to initial and             repurchase agreements and dollar rolls, but  
                 variation margins are not considered a pledge        only if after each such borrowing there is   
                 of assets.                                           asset coverage of at least 300% as defined in
                                                                      the 1940 Act; and (v) as otherwise permitted 
                                                                      under the 1940 . Act. For purposes of this   
                                                                      investment restriction, the deferral of      
                                                                      trustees' fees and transactions in short     
                                                                      sales, futures contracts, options on futures 
                                                                      contracts, securities or indices and forward 
                                                                      commitment transactions shall not constitute 
                                                                      borrowing.                                   
- ---------------- ---------------------------------------------        ---------------------------------------------
<PAGE>
- ---------------- ---------------------------------------------        ---------------------------------------------
1(a)
contd.                                                                                   * * * *

                                                                      Explanation: The amended restriction does not
                                                                      change the maximum amount of money which the 
                                                                      fund may borrow but makes more explicit      
                                                                      certain exceptions to the general prohibition
                                                                      against borrowing. The amended restriction   
                                                                      also affords the fund additional flexibility 
                                                                      to borrow money for other than extraordinary 
                                                                      or emergency purposes if the adviser         
                                                                      determines such borrowing is in the best     
                                                                      interests of the fund and is consistent both 
                                                                      with the fund's investment objective and with
                                                                      the requirements of the 1940 Act.            
                                                                          
                                                                                         * * * *

                                                                      The restriction in the second part of the   
                                                                      existing restriction relating to the        
                                                                      pledging, mortgaging or hypothecating of the
                                                                      fund's assets has been eliminated. This     
                                                                      restriction was imposed on the fund by state
                                                                      securities regulations that no longer apply 
                                                                      to the fund.
- ---------------- ---------------------------------------------        ---------------------------------------------
1(b)             The Fund may not underwrite securities issued         Amended as follows: The fund may not act as  
                 by other persons except insofar as the Fund           an underwriter, except to the extent that in 
                 may technically be deemed an underwriter              connection with the disposition of portfolio 
                 under the Securities Act of 1933 in selling a         securities, the Fund may be deemed to be an  
                 portfolio security.                                   underwriter for purposes of the Securities   
                                                                       Act of 1933.                                 

                                                                                             * * * *

                                                                       Explanation: The 1940 Act prohibits the fund 
                                                                       from underwriting securities of other        
                                                                       issuers. The amended restriction is          
                                                                       substantively identical to the current       
                                                                       restriction, but is rewritten to conform the 
                                                                       restriction to the language of the other John
                                                                       Hancock Funds' restrictions.
- ---------------- ---------------------------------------------        ---------------------------------------------

<PAGE>

- ---------------- ---------------------------------------------        ---------------------------------------------
1(c)             The Fund may not purchase or retain real             Amended and restated as two restrictions as  
                 estate (including limited partnership                follows: The fund may not purchase, sell or  
                 interests but excluding securities of                invest in real estate, but subject to its    
                 companies, such as real estate investment            other investment policies and restrictions   
                 trusts, which deal in real estate or                 may invest in securities of companies that   
                 interests therein and securities secured by          deal in real estate or are engaged in the    
                 real estate), or mineral leases, commodities         real estate business. These companies include
                 or commodity contracts (except contracts for         real estate investment trusts and securities 
                 the future delivery of fixed income                  secured by real estate or interests in real  
                 securities, stock index and currency futures         estate. The fund may hold and sell real      
                 and options on such futures) in the ordinary         estate acquired through default, liquidation 
                 course of its business. The Fund reserves the        or other distributions of an interest in real
                 freedom of action to hold and to sell real           estate as a result of the fund's ownership of
                 estate or mineral leases, commodities or             securities.                                  
                 commodity contracts acquired as a result of          
                 the ownership of securities.                         The fund may not invest in commodities or    
                                                                      commodity futures contracts, except for      
                                                                      transactions in financial derivative         
                                                                      contracts, such as forward currency          
                                                                      contracts; financial futures contracts and   
                                                                      options on financial futures contracts;      
                                                                      options on securities, currencies and        
                                                                      financial indices; and swaps, caps, floors,  
                                                                      collars and swaptions. The fund may not      
                                                                      invest in commodities or commodity futures   
                                                                      contracts, except for transactions in        
                                                                      financial derivative contracts, such as      
                                                                      forward currency contracts; financial futures
                                                                      contracts and options on financial futures   
                                                                      contracts; options on securities, currencies 
                                                                      and financial indices; and swaps, caps,      
                                                                      floors, collars and swaptions.               
                                                                      
                                                                      Explanation: The existing restriction     
                                                                      contains two unrelated restrictions. These
                                                                      restrictions have been separated into two 
                                                                      amended restrictions for improved clarity.
                                                                      The two amended restrictions are          
                                                                      substantively identical to the existing   
                                                                      restriction.
- ---------------- ---------------------------------------------        ---------------------------------------------

<PAGE>

- ---------------- ---------------------------------------------        ---------------------------------------------
1(d)             The Fund may not invest in direct                    Eliminated (not required by the 1940 Act)
                 participation interests in oil, gas or other
                 mineral exploration or development programs.
                                   
                                                                      Explanation: This restriction was imposed on 
                                                                      the fund by state securities regulations that
                                                                      no longer apply to the fund. The fund does   
                                                                      not invest in direct participation interests 
                                                                      in oil, gas or other mineral exploration or  
                                                                      development programs as part of its          
                                                                      investment strategy.
- ---------------- ---------------------------------------------        ---------------------------------------------
1(e)             The Fund may not make loans to other persons         Amended as follows: The fund may not make    
                 except by the purchase of obligations in             loans, except that the fund (1) may lend     
                 which the Fund is authorized to invest and by        portfolio securities in accordance with the  
                 entering into repurchase agreements; provided        fund's investment policies up to 33 1/3% of  
                 that the Fund may lend its portfolio                 the fund's total assets taken at market      
                 securities not in excess of 30% of its total         value, (2) enter into repurchase agreements, 
                 assets (taken at market value).                      and (3) purchase all or a portion of an issue
                                                                      of publicly distributed debt securities, bank
                 Not more than 10% of the Fund's total assets         loan participation interests, bank           
                 (taken at market value) will be subject to           certificates of deposit, bankers'            
                 repurchase agreements maturing in more than          acceptances, debentures or other securities, 
                 seven days. For these purposes the purchase          whether or not the purchase is made upon the 
                 of all or a portion of an issue of debt              original issuance of the securities.         
                 securities shall not be considered the making                                                     
                 of a loan.                                                              * * * *

                                                                      Explanation: The first part of the existing          
                                                                      restriction is not substantively changed, but
                                                                      has been rewritten to conform to a more      
                                                                      modern phrasing of lending restrictions.     
                                                                      
                                                                      The second part of the existing restriction  
                                                                      is not required under the 1940 Act and has   
                                                                      been eliminated. The fund's board has adopted
                                                                      a non-fundamental restriction which limits   
                                                                      the fund's investments in illiquid securities
                                                                      to 15% of its net assets.
- ---------------- ---------------------------------------------        ---------------------------------------------

<PAGE>

- ---------------- ---------------------------------------------        ---------------------------------------------
1(f)             The Fund may not purchase the securities of          Amended as follows: With respect to 75% of   
                 any issuer if such purchase, at the time             the fund's total assets, the fund may not    
                 thereof, would cause more than 5% of its             invest more than 5% of the fund's total                
                 total assets (taken at market value) to be           assets in the securities of any single issuer          
                 invested in the securities of such issuer,           or own more than 10% of the outstanding                
                 other than securities issued or guaranteed by        voting securities of any one issuer, in each           
                 the United States or any state or political          case other than (i) securities issued or               
                 subdivision thereof, or any political                guaranteed by the U.S. Government, its                 
                 subdivision of any such state, or any agency         agencies or its instrumentalities or (ii)              
                 or instrumentality of the United States, any         securities of other investment companies.              
                 state or political subdivision thereof, or                     
                 any political subdivision of any such state.                            * * * *
                 In applying these limitations, a guarantee of                  
                 a security will not be considered a security         Explanation: The amended diversification               
                 of the guarantor, provided that the value of         restriction will apply to 75% instead of 100%          
                 all securities issued or guaranteed by that          of the fund's total assets. The 100%                   
                 guarantor, and owned by the Fund, does not           limitation is not required by the 1940 Act.            
                 exceed 10% of the Fund's total assets. In            This change will allow the fund to invest up           
                 determining the issuer of a security, each           to 25% of its total assets in the securities           
                 state and each political subdivision agency,         of any one issuer, which will provide the              
                 and instrumentality of each state and each           fund with additional flexibility to invest             
                 multi-state agency of which such state is a          more significantly in certain issuers when             
                 member is a separate issuer. Where securities        the adviser determines that an investment              
                 are backed only by assets and revenues of a          presents a special opportunity for the fund.           
                 particular instrumentality, facility or              This change would also increase the risks of           
                 subdivision, such entity is considered the           investing in the fund because the fund would           
                 issuer.                                              become more susceptible to events that effect          
                                                                      individual issuers.                          
- ---------------- ---------------------------------------------        ---------------------------------------------
1(g)             The Fund may not invest in companies for the         Reclassified as a non-fundamental restriction
                 purpose of exercising control or management.         (not required to be fundamental by the 1940  
                                                                      Act).                                        

                                                                                             * * * *

                                                                      Explanation: The board has adopted a       
                                                                      non-fundamental policy to prohibit the fund
                                                                      from investing in companies for the purpose
                                                                      of exercising control or management of any 
                                                                      company.
- ---------------- ---------------------------------------------        ---------------------------------------------

<PAGE>



- ---------------- ---------------------------------------------        ---------------------------------------------
1(h)             The Fund may not purchase or retain in its           Eliminated (not required by the 1940 Act).
                 portfolio any securities issued by an issuer 
                 any of whose officers, directors, trustees or                           * * * *       
                 security holders is an officer or Trustee of                   
                 such Fund, or is a member, partner, officer          Explanation: This restriction was imposed by           
                 or Director of the Adviser, if after the             state securities regulations that no longer            
                 purchase of the securities of such issuer by         apply to the fund. This restriction is not             
                 the Fund one or more of such persons owns            necessary because principal transactions (the          
                 beneficially more than 1/2 of 1% of the              direct purchase or sale of securities for a            
                 shares or securities, or both, all taken at          person's own account) with affiliated persons          
                 market value, of such issuer, and such               (persons who have an existing relationship             
                 persons owning more than 1/2 of 1% of such           with the fund, such as any employee, officer           
                 shares or securities together own                    or trustee of the fund) are already                    
                 beneficially more than 5% of such shares or          restricted by the 1940 Act.          
                 securities, or both, all taken at market                       
                 value.                                                         
- ---------------- ---------------------------------------------        ---------------------------------------------
1(i)             The Fund may not purchase any securities or          Amended and reclassified as a non-         
                 evidences of interest therein on margin,             fundamental restriction (not required to be
                 except that the Fund may obtain such                 fundamental by the 1940 Act).          
                 short-term credit as may be necessary for the                  
                 clearance of purchases and sales of                                     * * * *
                 securities and the Fund may make deposits on                   
                 margin in connection with futures contracts          Explanation: The board has adopted a                 
                 and related options.                                 non-fundamental restriction prohibiting the          
                                                                      fund from purchasing securities on margin. 
                                                                      The non-fundamental restriction is         
                                                                      substantively identical to the existing    
                                                                      fundamental restriction.                   
- ---------------- ---------------------------------------------        ---------------------------------------------
1(j)             The Fund may not sell any security which the         Eliminated (not required by the 1940 Act).
                 Fund does not own unless by virtue of its   
                 ownership of other securities it has at the                             * * * *     
                 time of sale a right to obtain securities                     
                 without payment of further consideration             Explanation: Elimination of this restriction           
                 equivalent in kind and amount to the                 means that the fund may engage in short sales         
                 securities sold and provided that if such            to the extent permitted by the 1940 Act. The          
                 right is conditional the sale is made upon           fund does not engage in short sales as part           
                 equivalent conditions.                               of its investment strategy and has no current         
                                                                      intention to do so.                          
- ---------------- ---------------------------------------------        ---------------------------------------------

<PAGE>

- ---------------- ---------------------------------------------        ---------------------------------------------
1(k)             The Fund may not knowingly invest in                 Eliminated (not required by the 1940 Act).
                 securities which are subject to legal or   
                 contractual restrictions on resale or for                               * * * *     
                 which there is no readily available market           
                 (e.g., trading in the security is suspended          Explanation: As noted in Proposal 1(e) above,        
                 or market makers do not exist or will not            the fund's board has adopted a                       
                 entertain bids or offers), except for                non-fundamental restriction limiting the             
                 repurchase agreements, if, as a result               fund's investments in illiquid securities to         
                 thereof more than 10% of the Fund's total            15% of its net assets.        
                 assets (taken at market value) would be so                   
                 invested.                                                    
- ---------------- ---------------------------------------------        ---------------------------------------------
1(l)             The Fund may not issue any senior security           Amended as follows: The fund may not issue
                 (as that term is defined in the [1940 Act])          senior securities, except to the extent   
                 if such issuance is specifically prohibited          permitted by the 1940 Act.          
                 by the [1940 Act] or the rules and                             
                 regulations promulgated thereunder. For the                             * * * *       
                 purpose of this restriction, collateral                        
                 arrangements with respect to options, futures        Explanation: This restriction has been              
                 contracts and options on futures contracts           amended for improved clarity, but has not           
                 and collateral arrangements with respect to          been substantively changed.           
                 initial and variation margins are not deemed                   
                 to be the issuance of a senior security.                       
- ---------------- ---------------------------------------------        ---------------------------------------------
1(m)             The Fund may not invest more than 25% of its         Amended as follows: The fund may not purchase
                 total assets (taken at market value) in the          the securities of issuers conducting their   
                 securities of issuers engaged in any one             principal activity in the same industry if,            
                 industry, except that the Fund may invest up         immediately after such purchase, the value of          
                 to 40% of the value of its total assets in           its investments in such industry would equal           
                 the securities of issuers engaged in the             or exceed 25% of its total assets taken at             
                 electric utility and telephone industries.           market value at the time of such purchase,             
                 The Adviser follows a policy of not causing          except that (i) the fund may invest up to 40%          
                 the Fund to invest more than 25% of its total        of the value of its total assets in the                
                 assets. Obligations issued or guaranteed by          securities of issuers engaged in the electric          
                 the U.S. Government or its agencies and              utility and telephone industries and (ii)              
                 instrumentalities are not subject to the             this limitation does not apply to investments          
                 foregoing 25% limitation. The Adviser follows        in obligations of the U.S. Government or any           
                 a policy of not causing the Fund to invest           of its agencies or instrumentalities. The              
                 more than 25% of its total assets in the             fund may not concentrate its investments in            
                 securities of issuers engaged in the electric        the securities of issuers engaged in the               
                 utility industry or the telephone industry                     
                 unless yields available for four consecutive                   
                 weeks in the four highest rating categories                    
                 on new issue bonds in this                                     
- ---------------- ---------------------------------------------        ---------------------------------------------

<PAGE>

- ---------------- ---------------------------------------------        ---------------------------------------------
1(m)contd.       industry (issue size of $50 million or more)         electric utility industry or the telephone  
                 have averaged greater than the yields of new         industry unless yields available for four             
                 issue long-term industrial bonds similarly           consecutive weeks in the four highest rating          
                 rated (issue size of $50 million or more)            categories on new issue bonds in either               
                 and, in the opinion the Adviser, the relative        industry (issue size of $50 million or more)          
                 return available from the electric utility or        have averaged greater than the yields of new          
                 telephone industry and the relative risk,            issue long-term industrial bonds similarly            
                 marketability, quality and availability              rated (issue size of $50 million or more)                
                 of securities of this industry justifies such        and, in the opinion the adviser, the utility           
                 an investment. Obligations issued or                 or telephone industry and the relative risk, 
                 guaranteed by the U.S. Government or its             marketability, quality and availability of   
                 agencies and instrumentalities relative              securities of this industry justifies such an
                 return available from the electric are not           investment.
                 subject to the foregoing 25% limitation. In                    
                 addition, for purposes of this limitation,                              * * * *      
                 determinations of what constitutes an                          
                 industry are made in accordance with specific        Explanation: The 1940 Act requires that the           
                 industry codes set forth in the Standard             fund adopt a fundamental restriction with             
                 Industrial Classification Manual and without         respect to concentrating its investments in           
                 considering groups of industries (e.g., all          particular industries. However, the 1940 Act          
                 utilities, to be an industry).                       does not require that the concentration     
                                                                      restriction reference how industry          
                                                                      classifications are determined and that part
                                                                      of the restriction has been eliminated.     
- ---------------- ---------------------------------------------        ---------------------------------------------
1(n)             The Fund may not purchase securities of any          Amended and incorporated into Proposal
                 (other than securities issued or guaranteed          by the 1(f).                          
                 issuer U.S. Government or its agencies or                    
                 instrumentalities) if such purchase, at the          Explanation: This restriction has been              
                 time thereof, would cause the Fund to hold           incorporated into the diversification policy        
                 more than 10% of any class of securities of          listed in Proposal 1(f) above. The amended          
                 such issuer. For this purpose, all                   restriction remains substantively identical         
                 indebtedness of an issuer shall be deemed a          but will apply to 75% instead of 100% of the        
                 single class and all preferred stock of an           fund's total assets.        
                 issuer shall be deemed a single class.
- ---------------- ---------------------------------------------        ---------------------------------------------
</TABLE>

                       BOARD EVALUATION AND RECOMMENDATION

The trustees  believe that the proposed  amendments  to the fund's  restrictions
will more  clearly  reflect  current  regulatory  practice  and will  expand the
investment  opportunities  available  to the  fund.  Accordingly,  the  trustees
recommend  that you  approve  the  proposal  to change  the  fund's  fundamental
investment restrictions as described above.

<PAGE>

If the  required  approval of a change to a  restriction  is not  obtained,  the
current investment restriction will continue in effect.

The trustees of your fund recommend that the  shareholders of your fund vote for
the proposal to amend the fund's investment restrictions.


                         VOTING RIGHTS AND REQUIRED VOTE

Each  share of your fund is  entitled  to one vote.  Approval  of each  proposal
requires  the  affirmative  vote  of a  majority  of the  shares  of  your  fund
outstanding  and  entitled  to  vote.  For  this  purpose,  a  majority  of  the
outstanding  shares of your fund means with respect to each proposal the vote of
the lesser of

(1)      67% or more of the shares  present at the  meeting,  if the  holders of
         more than 50% of the shares of the fund are present or  represented  by
         proxy, or

(2)      more than 50% of the outstanding shares of the fund.

Shares of your fund  represented in person or by proxy,  including  shares which
abstain or do not vote with respect to a proposal,  will be counted for purposes
of  determining  whether  there  is a quorum  at the  meeting.  Accordingly,  an
abstention from voting has the same effect as a vote against a proposal.

However, if a broker or nominee holding shares in "street name" indicates on the
proxy card that it does not have discretionary  authority to vote on a proposal,
those  shares  will  not be  considered  present  and  entitled  to vote on that
proposal.  Thus, a "broker  non-vote" has no effect on the voting in determining
whether a proposal has been adopted in accordance with clause (1) above, if more
than 50% of the  outstanding  shares  (excluding  the  "broker  non-votes")  are
present or represented.  However, for purposes of determining whether a proposal
has been adopted in accordance  with clause (2) above,  a "broker  non-vote" has
the same effect as a vote against that proposal because shares  represented by a
"broker non-vote" are considered to be outstanding shares.


                       INFORMATION CONCERNING THE MEETING

Solicitation of Proxies

In addition to the mailing of these proxy materials, proxies may be solicited by
telephone,  by fax or in person by the trustees,  officers and employees of your
fund;  by personnel  of the  adviser,  the fund's  principal  distributor,  John

<PAGE>

Hancock Funds, and the fund's transfer agent, John Hancock  Signature  Services,
Inc., or by broker-dealer firms. Signature Services, together with a third party
solicitation firm, has agreed to provide proxy  solicitation  services at a cost
of approximately $_______, which will be paid by the Fund.

The  mailing  address of the fund,  the adviser  and John  Hancock  Funds is 101
Huntington Avenue, Boston, Massachusetts, 02199.

Revoking Proxies

A  shareholder  signing and  returning a proxy has the power to revoke it at any
time before it is exercised:

         o        By filing a  written  notice of  revocation  with your  fund's
                  transfer agent, John Hancock Signature Services,  Inc., 1 John
                  Hancock Way, Suite 1000, Boston, Massachusetts 02217-1000,

         o        By  returning a duly  executed  proxy with a later date before
                  the time of the meeting, or

         o        If a  shareholder  has  executed a proxy but is present at the
                  meeting  and  wishes  to  vote in  person,  by  notifying  the
                  secretary of the fund (without complying with any formalities)
                  at any time before it is voted.

Being  present at the meeting  alone does not revoke a  previously  executed and
returned proxy.

Outstanding Shares and Quorum

As of September 16, 1998,  _____________  Class A shares  __________ and Class B
shares of beneficial interest of the fund were outstanding. Only shareholders of
record on September 16, 1998 (record date) are entitled to notice of and to vote
at the  meeting.  A  majority  of the  outstanding  shares  of the fund that are
entitled to vote will be considered a quorum for the transaction of business.

Other Business

The  fund's  board  of  trustees  knows  of  no  business  to be  presented  for
consideration  at the  meeting  other than the  proposal.  If other  business is
properly brought before the meeting, proxies will be voted according to the best
judgment of the persons named as proxies.

<PAGE>

Adjournments

If a quorum is not  present in person or by proxy at the time any session of the
meeting is called to order,  the persons named as proxies may vote those proxies
that have been  received to adjourn the meeting to a later date.  If a quorum is
present but there are not sufficient votes in favor of the proposal, the persons
named as proxies may propose one or more  adjournments  of the meeting to permit
further  solicitation of proxies  concerning the proposal.  Any adjournment will
require the  affirmative  vote of a majority of the fund's shares at the session
of the meeting to be  adjourned.  If an  adjournment  of the meeting is proposed
because there are not  sufficient  votes in favor of the  proposal,  the persons
named as proxies  will vote those  proxies  favoring  the  proposal  in favor of
adjournment,   and  will  vote  those  proxies  against  the  proposal   against
adjournment.

Telephone Voting

In addition to  soliciting  proxies by mail,  by fax or in person,  the fund may
also arrange to have votes  recorded by  telephone by officers and  employees of
the fund or by personnel of the adviser or transfer agent.  The telephone voting
procedure is designed to verify a shareholder's identity, to allow a shareholder
to  authorize  the  voting  of  shares  in  accordance  with  the  shareholder's
instructions  and to confirm  that the voting  instructions  have been  properly
recorded.  If these  procedures  were subject to a successful  legal  challenge,
these  telephone  votes  would not be counted at the  meeting.  The fund has not
obtained an opinion of counsel  about  telephone  voting,  but is currently  not
aware of any challenge.

         o        A  shareholder  will  be  called  on a  recorded  line  at the
                  telephone  number in the fund's  account  records  and will be
                  asked to provide the  shareholder's  social security number or
                  other identifying information.

         o        The shareholder will then be given an opportunity to authorize
                  proxies to vote his or her shares at the meeting in accordance
                  with the shareholder's instructions.

         o        To  ensure  that  the  shareholder's  instructions  have  been
                  recorded  correctly,  the  shareholder  will  also  receive  a
                  confirmation of the voting instructions by mail.

         o        A  toll-free  number  will be  available  in case  the  voting
                  information contained in the confirmation is incorrect.

<PAGE>

         o        If the shareholder decides after voting by telephone to attend
                  the meeting, the shareholder can revoke the proxy at that time
                  and vote the shares at the meeting.


                        OWNERSHIP OF SHARES IN THE FUNDS

To the knowledge of the fund, as of September  16, 1998,  the following  persons
owned of record or beneficially  5% or more of the outstanding  Class A, Class B
and Class C shares of your fund.

[Insert table of 5% and less than 5% shareholders here]

As of  September  16,  1998,  the trustees and officers of the fund owned in the
aggregate less than 1% of the outstanding shares of the fund.

<PAGE>

Form of Proxy Card [FRONT]
- --------------------------------------------------------------------------------
                                                                           PROXY

                        JOHN HANCOCK HIGH YIELD BOND FUND
                       A SERIES OF JOHN HANCOCK BOND TRUST

         The undersigned holder of shares of beneficial interest of John Hancock
High Yield Bond Fund hereby  constitutes and appoints Anne C. Hodsdon,  James B.
Little and Susan S. Newton,  and each of them singly,  proxies and  attorneys of
the undersigned, with full power of substitution to each, for and in the name of
the  undersigned,  to vote and act upon all  matters at the  special  meeting of
shareholders  of the  fund to be  held on  Wednesday,  December  9,  1998 at the
offices of the fund, 101 Huntington Avenue, Boston, Massachusetts, at 9:00 a.m.,
eastern time, and at any and all adjournments thereof, relating to all shares of
the fund held by the  undersigned  or relating to all shares of the fund held by
the undersigned  which the undersigned would be entitled to vote or act with all
the powers the  undersigned  would  possess if personally  present.  All proxies
previously given by the undersigned relating to the meeting are hereby revoked.

ITEMS 1(a)-(n):   To amend the fund's investment restrictions.

     For All                       Against All                    For All Except

If you do not wish to  direct  the  voting  of your  shares  "For" a  particular
proposed change,  mark the "For All Except" box and check the "Against" box next
to the  proposed  change(s)  listed  below.  Your shares will be voted "For" the
remaining proposed changes.

<TABLE>
<S>                                                                                                    <C>
ITEM 1(a): To amend the fund's investment restriction on borrowing money.                            Against
ITEM 1(b): To amend the fund's investment restriction on underwriting securities.                    Against
ITEM 1(c): To amend the fund's investment restriction on purchasing real estate and commodities.     Against
ITEM 1(d): To eliminate the fund's investment restriction on direct investments in oil, gas or       Against
other mineral exploration ventures.
ITEM 1(e): To amend the fund's investment restriction on making loans.                               Against
ITEM 1(f): To amend the fund's investment restriction on portfolio diversification.                  Against
ITEM 1(g): To eliminate the fund's fundamental investment restriction on investing for the           Against
purpose of exercising control and reclassify the restriction as non-fundamental.
ITEM 1(h): To eliminate the fund's investment restriction on investing in affiliated companies.      Against
ITEM 1(i): To eliminate the fund's fundamental investment restriction on purchasing securities       Against
on margin and reclassify the restriction as non-fundamental.
ITEM 1(j): To eliminate the fund's investment restriction on short sales.                            Against
ITEM 1(k): To eliminate the fund's investment restriction on investing in restricted securities.     Against
ITEM 1(l): To amend the fund's investment restriction on issuing senior securities.                  Against
ITEM 1(m): To amend the fund's investment restriction on concentration.                              Against
ITEM 1(n): To amend the fund's investment restriction on diversification with respect to             Against
investments in any one issuer.
</TABLE>
<PAGE>

Form of Proxy Card [REVERSE]
- --------------------------------------------------------------------------------
         Specify your desired  action by check marks in the  appropriate  space.
This proxy will be voted as specified.  If no  specification  is made, the proxy
will be  voted in  favor  of each  item.  The  persons  named  as  proxies  have
discretionary  authority which they intend to exercise in favor of the proposals
referred to and  according to their best  judgment as to any other matters which
properly come before the meeting.

                  o        Please complete,  sign, date and return this proxy in
                  the enclosed envelope as soon as possible.

                  o        Please sign  exactly as your name or names  appear in
                  the box on the  left.  When  signing  as  attorney,  executor,
                  administrator,  trustee  or  guardian,  please  give your full
                  title as such.

                  o        If a corporation,  please sign in full corporate name
                  by president or other authorized officer.

                  o        If a partnership,  please sign in partnership name by
                  authorized person.

                  Date ______________________________________________ , 1998
                  __________________________________________________________
                  __________________________________________________________


                  This proxy is solicited by the board of trustees



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