LORD ABBETT INVESTMENT TRUST
N14AE24, 1996-03-01
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                                                      1940 Act File No. 811-7988
                                                      1933 Act File No.
                                                                                
================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                              -------------------

                                   FORM N-14

                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933
                      [ ]  Pre-Effective Amendment No. __
                      [ ] Post-Effective Amendment No. __

                          LORD ABBETT INVESTMENT TRUST
               (Exact Name of Registrant as Specified in Charter)


                 The General Motors Building, 767 Fifth Avenue
                            New York, New York 10153
                    (Address of Principal Executive Offices)
        Registrant's Telephone Number, Including Area Code: 800-426-1130

                               Kenneth B. Cutler
                         Vice President and Secretary
                         Lord Abbett Investment Trust
                          The General Motors Building
                               767 Fifth Avenue
                           New York, New York 10153
                    (Name and Address of Agent for Service)


                 Approximate Date of Proposed Public Offering:
 As soon as practicable after the effective date of the registration statement.


NO FILING FEE IS REQUIRED BECAUSE AN INDEFINITE NUMBER OF SHARES ARE BEING
REGISTERED PURSUANT TO RULE 24F-2 UNDER THE INVESTMENT COMPANY ACT OF 1940.

            IT IS PROPOSED THAT THIS FILING WILL BECOME EFFECTIVE ON
                      MARCH  , 1996 PURSUANT TO RULE 488.

================================================================================
<PAGE>
 

                                LORD ABBETT INVESTMENT TRUST
 
                                   CROSS-REFERENCE SHEET
                                ITEMS REQUIRED BY FORM N-14
<TABLE>
<CAPTION>

PART A                                             
ITEM NO.  ITEM CAPTION                                                         PROSPECTUS CAPTION    
- - --------  ------------                                                         ------------------
<S>  <C>                                                                  <C>
1.   Beginning of Registration Statement and Outside                      Cover Page of Registration Statement;
     Front Cover Page of Prospectus                                       Cover Page of Proxy Statement and
                                                                          Prospectus                                       
                                                        
2.   Beginning and Outside Back Cover Page of                             Table of Contents
     Prospectus

3.   Fee Table, Synopsis and Risk Factors                                 Fee Table; Summary of Proposal

4.   Information about the Transaction                                    Summary of Proposal; Information
                                                                          About the Reorganization

5.   Information about the Registrant                                     Summary of Proposal; Comparative
                                                                          Information about the Acquiring Fund
                                                                          and the Acquired Fund; Additional
                                                                          Information; Prospectus of Lord
                                                                          Abbett Investment Trust dated March
                                                                          __, 1996

6.   Information about the Company Being Acquired                         Summary of Proposal; Comparative
                                                                          Information about the Acquiring Fund
                                                                          and the Acquired Fund

7.   Voting Information                                                   Special Meeting of Shareholders of
                                                                          the Acquired Fund; Notice of Special
                                                                          Meeting of Shareholders; Summary of
                                                                          Proposal

8.   Interest of Certain Persons and Experts                              Additional Information

9.   Additional Information Required for Reoffering                       Not Applicable
     by Persons Deemed to be Underwriters
</TABLE> 
<PAGE>
 
<TABLE>
<CAPTION>

PART B                                                                         STATEMENT OF ADDITIONAL                      
ITEM NO.  ITEM CAPTION                                                         INFORMATION CAPTION    
- - --------  ------------                                                         -------------------
<S>  <C>                                                                  <C>
10.  Cover Page                                                           Cover Page

11.  Table of Contents                                                    Not Applicable

12.  Additional Information about the Registrant                          Cover Page of Proxy Statement and
                                                                          Prospectus; Acquiring Fund State-
                                                                          ment of Additional Information incor-
                                                                          porated by reference.

13.  Additional Information about the Company Being                       Cover Page of Proxy Statement and
     Acquired                                                             Prospectus; Acquired Fund Statement
                                                                          of Additional Information incor-
                                                                          porated by reference.

14.  Financial Statements                                                 Pro-forma Financial Statements

PART C                                                                                  
ITEM NO.                                                                        PART C CAPTION
- - --------                                                                        --------------

15.  Indemnification                                                      Indemnification

16.  Exhibits                                                             Exhibits

17.  Undertakings                                                         Undertakings

Signatures
</TABLE>
<PAGE>
 
[Letterhead of Lord Abbett Securities Trust - Lord Abbett Balanced Trust]

FROM THE CHAIRMAN OF THE BOARD
- - ------------------------------

Dear Shareholder,

      Lord, Abbett & Co. is the investment manager for two funds with
substantially similar investment objectives and policies:  your Fund and the
Balanced Series, a series of Lord Abbett Investment Trust  (the "Acquiring
Fund"). To eliminate the offering of substantially identical funds and to take
advantage of potential economies of scale, the Board of Trustees of your Fund
has recommended that your Fund combine with the Acquiring Fund.

      If approved and consummated, this proposed combination of your Fund and
the Acquiring Fund will be a tax-free reorganization for Federal income tax
purposes.

      You are also being asked to ratify the selection of Deloitte & Touche LLP
as your Fund's independent accountants.  A shareholder vote is required on this
matter in case the proposed combination is not consummated.

      The proposal is subject to the approval of shareholders of your Fund at a
meeting to be held in New York on  June 19, 1996 at 10:00 a.m.

      YOUR VOTE ON THESE ISSUES IS CRITICAL.  TO ENSURE THAT YOUR VOTE IS
COUNTED, IT IS IMPORTANT THAT YOU:

      1.  REVIEW THE ENCLOSED PROXY STATEMENT AND PROSPECTUS;

      2.  COMPLETE AND SIGN THE ENCLOSED PROXY CARD; AND

      3.  RETURN THE PROXY CARD IN THE ENCLOSED ENVELOPE AS SOON AS POSSIBLE.

Your prompt response will help save your Fund the expense of additional
solicitations.

      We encourage you to review the enclosed materials.  Because we believe
this combination of funds is in the best interests of shareholders, we encourage
you to vote in favor of this proposal.

                                  Sincerely,

                                  Ronald P. Lynch
                                  Chairman of the Board
April 17, 1996
<PAGE>
 
                         LORD ABBETT SECURITIES TRUST -
                           LORD ABBETT BALANCED TRUST
                                767 Fifth Avenue
                            New York, New York 10153
                          Telephone No. (800) 426-1130



Notice of a Special Meeting of Shareholders
to be held on June 19, 1996                                     April 17, 1996


Notice is given hereby of a special meeting of the shareholders of Lord Abbett
Securities Trust.  The meeting will be held in the offices of Lord, Abbett &
Co., on the 11th floor of The General Motors Building, 767 Fifth Avenue, New
York, New York on June 19, 1996, at 10:00 a.m. for the following purposes and to
transact such other business as may properly come before the meeting and any
adjournments thereof.

ITEM 1.  To consider and act upon an Agreement and Plan of Reorganization
         between Lord Abbett Balanced Trust (the "Acquired Fund"), a series of
         Lord Abbett Securities Trust, and the Balanced Series, a series of Lord
         Abbett Investment Trust (the "Acquiring Fund") providing for (a) the
         transfer of all of the assets of the Acquired Fund to the Acquiring
         Fund in exchange for shares of a new class of the Acquiring Fund (to be
         designated "Class C Shares") and the assumption by the Acquiring Fund
         of all of the liabilities of the Acquired Fund, (b) the distribution of
         such Class C Shares to the shareholders of the Acquired Fund and (c)
         the subsequent termination of the Acquired Fund. A vote in favor of
         this Item 1 will be deemed to be a vote to authorize the Acquired Fund,
         as the sole shareholder of Class C Shares prior to this reorganization,
         to approve a proposed distribution plan pursuant to Section 12 of the
         Investment Company Act of 1940, as amended, and Rule 12b-1 thereunder
         applicable to that class.

ITEM 2.  To ratify the selection of Deloitte & Touche LLP as the independent
         auditors of the Lord Abbett Securities Trust for the current fiscal
         year.


                                         By order of the Board of Trustees


                                         Kenneth B. Cutler
                                         Vice President and Secretary

The Board of Trustees has fixed the close of business on March 22, 1996 as the
record date for determination of shareholders of the Acquired Fund entitled to
notice of and to vote at the meeting. Shareholders are entitled to one vote for
each share held.  As of  March 22, there were ____ shares of the Acquired Fund
issued and outstanding.
<PAGE>
 
- - --------------------------------------------------------------------------------

PLEASE INDICATE YOUR VOTING INSTRUCTIONS ON THE ENCLOSED PROXY CARD.

SIGN, DATE AND RETURN IT IN THE ENVELOPE PROVIDED.

TO SAVE THE COST OF ADDITIONAL SOLICITATIONS, PLEASE MAIL YOUR PROXY PROMPTLY.

- - --------------------------------------------------------------------------------
<PAGE>
 
              PROXY STATEMENT AND PROSPECTUS DATED MARCH   , 1996
            
                          ACQUISITION OF THE ASSETS OF
                    Lord Abbett Balanced Trust, a series of
                          Lord Abbett Securities Trust
                 The General Motors Building, 767 Fifth Avenue
                               New York, NY 10153
                                 (800) 426-1130

                    BY AND IN EXCHANGE FOR CLASS C SHARES OF
                          Balanced Series, A SERIES OF
                          Lord Abbett Investment Trust
                 The General Motors Building, 767 Fifth Avenue
                               New York, NY 10153
                                 (800) 426-1130


      This Proxy Statement and Prospectus relates to Class C shares (the "Class
C shares") of the Balanced Series (the "Acquiring Fund"), a series of Lord
Abbett Investment Trust (the "Investment Trust") to be issued to, and in
exchange for all the assets of, Lord Abbett Balanced Trust (the "Acquired Fund"
and, together with the Acquiring Fund, the "Funds"), a series of Lord Abbett
Securities Trust (the "Securities Trust").   In exchange for such assets, the
Acquiring Fund will also assume all of the liabilities of the Acquired Fund.
Following receipt of the Acquiring Fund Class C shares, the Acquired Fund will
be terminated and the Class C shares will be distributed to the shareholders of
the Acquired Fund.  The shareholders of the Acquired Fund are being asked to
vote to approve or disapprove these proposed transactions (the
"Reorganization"), which are more fully described in this Proxy Statement and
Prospectus.

      The Investment Trust and the Securities Trust are open-end diversified
investment management companies that seek current income and capital growth.
Lord, Abbett & Co. ("Lord Abbett") serves as investment manager to both Funds.

      The Class C shares of the Acquiring Fund will be a newly-created class of
shares that will share pro-rata with the existing class of Acquiring Fund shares
(the "Class A shares") in the portfolio, income and expenses of the Acquiring
Fund, except that each class will bear the expense of its own distribution and
shareholder servicing arrangements and certain other expenses.  See "Information
About the Reorganization -- Shares of the Acquiring Fund."  The distribution and
shareholder servicing arrangements for the Class C shares will be substantially
the same as the arrangements currently applicable to the Acquired Fund shares.
The trustees of the Securities Trust believe that the proposed transaction will
enable the shareholders of the Acquired Fund to benefit from economies of scale
while continuing to invest in a portfolio of securities managed by Lord Abbett
under an investment objective substantially similar to that of the Acquired
Fund.  See "Information About the Reorganization -- Reasons for the
Reorganization."

<PAGE>
 
      This Proxy Statement and Prospectus sets forth concisely the information
about the Acquiring Fund that a shareholder of the Acquired Fund should know
before voting on the Reorganization.  It should be read and retained for future
reference.  Attached as Exhibit A to this Proxy Statement and Prospectus is a
copy of the Agreement and Plan of Reorganization (the "Plan") for the
Reorganization.   This Proxy Statement and Prospectus is accompanied by the
Prospectus of the Acquiring Fund dated March 1, 1995 (the "Acquiring Fund
Prospectus"), which Prospectus is incorporated by reference herein.  Also
incorporated herein by reference are (a) the Statement of Additional Information
dated the date hereof relating to this Proxy Statement and Prospectus, including
the Statement of Additional Information of the Securities Trust dated December
27, 1994 and the Statement of Additional Information of the Acquiring Fund dated
March 1, 1995, and (b)  the Prospectus of the Securities Trust dated December
27, 1994 (the "Acquired Fund Prospectus") [a pre-effective amendment is to be
filed to incorporate by reference the Prospectus and Statement of Additional
Information of the Investment Trust and the Securities Trust to be dated March
1, 1996].  Such Statements of Additional Information and the Acquired Fund
Prospectus are available, upon oral or written request, and at no charge, from
the Acquiring Fund, at its above-noted telephone number and address.

===============================================================================
                               TABLE OF CONTENTS
<TABLE>
<CAPTION>
 
<S>                                                                      <C>
SPECIAL MEETING OF SHAREHOLDERS OF THE ACQUIRED FUND....................  2
 
FEE TABLE                                                                 4
 
ITEM 1. - APPROVAL OF THE AGREEMENT AND PLAN OF REORGANIZATION..........  5
 
    SUMMARY OF PROPOSAL.................................................  5
 
    INFORMATION ABOUT THE REORGANIZATION................................  7
 
    COMPARATIVE INFORMATION ABOUT THE
        ACQUIRING FUND AND THE ACQUIRED FUND............................ 11
 
ITEM 2. - RATIFICATION OR REJECTION
    OF INDEPENDENT PUBLIC ACCOUNTANTS................................... 13
 
ADDITIONAL INFORMATION.................................................. 14
Exhibit A - Agreement and Plan of Reorganization

Exhibit B - Comparison of Current and Proposed Investment Policies and
Restrictions
</TABLE> 
================================================================================
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
       EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE
           SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES
            COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY OF THIS
                PROSPECTUS.  ANY REPRESENTATION TO THE CONTRARY
                             IS A CRIMINAL OFFENSE.

<PAGE>
 
              SPECIAL MEETING OF SHAREHOLDERS OF THE ACQUIRED FUND


      This Prospectus and Proxy Statement is furnished in connection with the
solicitation of proxies by and on behalf of the Board of Trustees of the
Securities Trust on behalf of the Acquired Fund to be used at a Special Meeting
of Shareholders of the Securities Trust to be held at 10:00 a.m. on June 19,
1996, at the offices of Lord Abbett on the 11th floor of the General Motors
Building, 767 Fifth Avenue, New York, New York 10153, and at any adjournments
thereof.  This Prospectus and Proxy Statement and the enclosed proxy card are
first being mailed to shareholders of the Acquired Fund on or about April 17,
1996.

      At the close of business on March 22, 1996 (the "Record Date"), there were
issued and outstanding ____ shares of the Acquired Fund.  Only shareholders of
record as of the close of business on the Record Date will be entitled to notice
of, and to vote at, the meeting or any adjournment thereof. Shareholders of the
Acquired Fund are entitled to one vote for each share.  Under Delaware law,
shares owned by two or more persons (whether as joint tenants, co-fiduciaries or
otherwise) will be voted as follows, unless a written instrument or court order
providing to the contrary has been filed with the Secretary of the Acquired
Fund:  (1) if only one votes, that vote binds all; (2) if more than one votes,
the vote of the majority binds all; and (3) if more than one votes and the vote
is evenly divided, the vote will be cast proportionately.

      Approval of the Plan and the Reorganization will require the affirmative
vote of a majority of the shares of the Acquired Fund voted on the matter.  One-
third of the aggregate number of shares of the Acquired Fund shall be necessary
to constitute a quorum for approval of the Plan and the Reorganization.  Shares
with respect to which there is an abstention or broker non-vote shall be counted
for quorum purposes and shall not be treated as "voted" for purposes of
determining whether the proposal has passed. If the enclosed form of proxy is
properly executed and returned in time to be voted at the meeting, the proxies
named therein will vote the shares represented by the proxy in accordance with
the instructions marked thereon.  A proxy may be revoked by the signer at any
time at or before the meeting by written notice to the Acquired Fund, by
execution of a later-dated proxy or by voting in person at the meeting.  Unless
revoked, all valid proxies will be voted in accordance with the specifications
thereon or, in the absence of such specifications, FOR approval of the Plan and
the Reorganization, FOR ratification of the selection of Deloitte & Touche as
the Acquired Fund's independent auditors and on any other matters as deemed
appropriate.

      Proxies will be solicited by mail.  Additional solicitations may be made
by telephone, facsimile or personal contact by officers or employees of Lord
Abbett and its affiliates.  The Acquired Fund may also request brokerage houses,
custodians, nominees, and fiduciaries who are shareholders of record to forward
proxy material to the beneficial owners.  D.F. King & Co. has been retained to
assist in the solicitation of proxies at an estimated cost of $_______.  The
cost of the solicitation will be borne by ______________.

      In the event that sufficient votes to approve the Plan are not received by
the meeting date, the persons named as proxies may propose one or more
adjournments of the meeting to permit further solicitation of proxies.  In
determining whether to adjourn the meeting, the following factors may be
considered:  the percentage of votes actually cast, the percentage of negative
votes actually cast and the nature of any further solicitation and any
information to be provided to shareholders with respect to such

                                       2
<PAGE>
 
a solicitation.  Any such adjournment will require an affirmative vote of a
majority of the shares present in person or by proxy and entitled to vote at the
meeting.  The persons named as proxies will vote upon such adjournment after
consideration of the best interests of all shareholders.

      If the Plan is not approved by the shareholders of the Acquired Fund, or
if the Reorganization is not consummated for any other reason, the Acquired Fund
will continue to engage in business as a series of the Securities Trust.

                                       3
<PAGE>
 
                                 FEE TABLE

      Set forth below is a summary comparison of the expenses of (a) the shares
of the Acquiring Fund (currently, the only class of Acquiring Fund shares, to be
designated "Class A"), (b) the shares of the Acquired Fund and (c) on a pro-
forma basis after giving effect to the Reorganization, the Class C shares of the
Acquiring Fund (to be issued in the Reorganization in exchange for the shares of
the Acquired Fund).  The annual operating expenses shown in the summary
comparison for the Acquiring Fund shares and the Acquired Fund shares are the
actual expenses for the fiscal years ending October 31, 1995 and October 31,
1995, respectively, and those shown on a pro-forma basis for the Class C shares
of the Acquiring Fund are the estimated expenses of such shares for the
subsequent year had the Reorganization occurred on November 1, 1994.  The
example set forth below is not a representation of past or future expenses.
Actual expenses may be greater or less than those shown.

<TABLE>
<CAPTION>
- - ------------------------------------------------------------------------------------------------------------------------------------

                                                     ACQUIRING FUND SHARES                                      ACQUIRING FUND
SHAREHOLDER TRANSACTION EXPENSES)                     (TO BE DESIGNATED                                         CLASS C SHARES
(AS A PERCENTAGE OF OFFERING PRICE                        CLASS A)                ACQUIRED FUND SHARES            (PRO-FORMA)
- - ------------------------------------------------------------------------------------------------------------------------------------

<S>                                                       <C>                           <C>                        <C>
   Maximum Sales Load on Purchases/(1)/                   4.75%/(2)/                    None/(3)/                 None/(3)/
- - ------------------------------------------------------------------------------------------------------------------------------------

   Deferred Sales Load /(1)/                               None/(2)/                  1.00%/(4)/                  1.00%/(4)/
- - ------------------------------------------------------------------------------------------------------------------------------------

ANNUAL OPERATING EXPENSES
(AS A PERCENTAGE OF AVERAGE NET ASSETS)
- - ------------------------------------------------------------------------------------------------------------------------------------

    Management Fee                                          0.00%                     0.00%/(6)/                  0.00%/(5)/
- - ------------------------------------------------------------------------------------------------------------------------------------

    Rule 12b-1 Fees                                       0.00% /(2)/                 0.22%/(3)/                  0.22%/(3)(5)/
- - ------------------------------------------------------------------------------------------------------------------------------------

    Other Expenses                                          0.37%                      0.00%                      0.37%/(5)/
- - ------------------------------------------------------------------------------------------------------------------------------------

TOTAL OPERATING EXPENSES                                  0.37%/(8)/                  0.22%/(8)/                  0.59%/(5)(8)/
- - ------------------------------------------------------------------------------------------------------------------------------------

Example:  Assume each Fund's annual return is 5% and there is no change in the level of expenses described above .  For every
- - -------  
 $1,000 invested, with reinvestment of all distributions, you would pay the following total expenses if you closed your account
 after the number of years indicated.

                                                        1 YEAR               3 YEARS               5 YEARS               10 YEARS
                                                        ------               -------               --------              --------
          ACQUIRING FUND CLASS A SHARES /(7)/            $51                   $59                    $67                   $92
          ACQUIRED FUND SHARES /(7)/                      $2                    $7                    $12                   $28
          ACQUIRING FUND CLASS C SHARES                   $6                   $19                    $33                   $74
             (PRO-FORMA)/(7)/
/(1)/  Sales "load" is referred to as sales "charge" and "deferred sales load" is referred to as "contingent deferred reimbursement
       charge" throughout this Proxy Statement and Prospectus.
/(2)/  See "Purchases" in the Acquiring Fund Prospectus accompanying this Proxy Statement and Prospectus for descriptions of the
       front-end sales charges,  the 1% contingent deferred reimbursement charges payable on sales and certain redemptions of these
       shares and the Rule 12b-1 plan applicable to the shares of the Acquiring Fund.
/(3)/  Although the Acquired Fund does not, and the Acquiring Fund will not with respect to the Class C shares, charge a front-end
       sales charge, investors should be aware that long-term shareholders may pay, under the Rule 12b-1 plan of the Acquired Fund
       and under the Rule 12b-1 plan to be applicable to the Class C shares of the Acquiring Fund (which pays and will pay annual
       0.25% service and 0.75% distribution fees), more than the economic equivalent of the maximum front-end sales charge as
       permitted by certain rules of the New York Association of Securities Dealers, Inc.
/(4)/  Redemptions of the Acquired Fund shares are, and redemptions of the Class C shares will be, subject to a 1% contingent
       deferred reimbursement charge if the redemption occurs before the first anniversary of the share purchase. For this purpose,
       Class C shares received in the Reorganization will be deemed to have been purchased on the date the holders purchased or were

       deemed to purchase the shares of the Acquired Fund exchanged for such Class C shares. See "12b-1 Plans" under "Information
       About Reorganization. "

/(5)/  The expenses of the Acquiring Fund Class C Shares are estimated.   Lord Abbett intends to neither waive its management fee
       or subsidize expenses for the years subsequent to the Reorganization with respect to Class C shares of the Acquiring Fund.
/(6)/  Lord Abbett waived its management fee and subsidized certain expenses with respect to the Acquired Fund during the past year
       (and continues to do so).  The management fee and other expenses would have been 0.75% and 1.47%, respectively, absent such
        waiver.
/(7)/  Based on total operating expenses or estimated operating expenses shown in the table above.
/(8)/  Not annualized.

The foregoing is provided to assist shareholders of the Acquired Fund in understanding the various expenses the holders of the
shares of the Acquiring Fund and the holders of shares of the Acquired Fund have incurred and that holders of the shares of the
Acquired Fund might incur as holders of the Class C shares following the Reorganization.
- - ------------------------------------------------------------------------------------------------------------------------------------

</TABLE>

                                       4
<PAGE>
 
        ITEM 1. - APPROVAL OF THE AGREEMENT AND PLAN OF REORGANIZATION

                              SUMMARY OF PROPOSAL

      The following is a summary of certain information contained elsewhere or
incorporated by reference in this Proxy Statement and Prospectus and is
qualified in its entirety by reference to such information.

OVERVIEW OF PROPOSED REORGANIZATION.  The Plan provides for the transfer to the
Acquiring Fund of all of the assets of the Acquired Fund in exchange for Class C
shares and the assumption by the Acquiring Fund of all of the liabilities of the
Acquired Fund.  The Class C shares will then be distributed to the Acquired Fund
shareholders and the Acquired Fund will be terminated.  As a result of the Reor
ganization, each shareholder of the Acquired Fund will become the owner of that
number of full and fractional Class C shares having an aggregate net asset value
equal to the aggregate net asset value of their shares of the Acquired Fund, as
of the close of business on the date the Acquired Fund assets are transferred to
the Acquiring Fund.  Consummation of the Reorganization is subject to the
approval of the Acquired Fund's shareholders and other conditions, including
Acquiring Fund shareholder approval of an amendment to the Investment Trust's
Declaration and Agreement of Trust authorizing the creation of the Class C
shares.

      To avoid a need to call an Acquiring Fund shareholders' meeting after the
Reorganization, shareholders of the Acquired Fund are being asked to authorize
the Acquired Fund, as the sole Class C shareholder of the Acquiring Fund before
the Reorganization, to approve the proposed distribution plan for the Class C
shares.  A vote in favor of the Reorganization will be deemed also to be a vote
to authorize the Acquired Fund to take such action.

      The trustees of the Securities Trust believe that the proposed
Reorganization will enable the shareholders of the Acquired Fund to benefit on a
long-term basis from economies of scale while continuing to invest in a
portfolio of securities managed by Lord Abbett under the same investment
objective as that of the Acquired Fund.  See "Information About the
Reorganization -- Reasons for Reorganization" for additional information about
the reasons for the Reorganization.

BUSINESSES OF THE ACQUIRED AND ACQUIRING FUNDS.  The Acquired Fund is a
diversified series of the Securities Trust, an open-end management investment
company organized as a Delaware business trust under an Agreement and
Declaration of Trust dated February 26, 1993.  The Securities Trust offers ten
series, one of which is the Acquired Fund, each consisting of one class of
shares.  The Acquired Fund commenced investment operations on January 3, 1994.
As of December 31, 1995, the Acquired Fund's net assets were approximately $2
million.

      The Acquiring Fund is a diversified series of the Investment Trust, an
open-end management investment company organized under Delaware law on August
16, 1993.  To date, the Acquiring Fund offers three series, one of which is the
Acquiring Fund, each consisting of one class of shares.  As of December 31,
1995, the Acquiring Fund's net assets were approximately $6 million.

                                       5
<PAGE>
 
INVESTMENT OBJECTIVES AND POLICIES OF THE ACQUIRED FUND AND THE ACQUIRING FUND.
The Acquired Fund and Acquiring Fund have identical investment objectives:  to
seek current income and capital growth.  The two Funds also have generally
similar investment policies and restrictions.  The Acquiring Fund is seeking to
revise and reclassify certain of its investment policies and restrictions in
order to provide greater flexibility in managing the investment portfolio of the
Acquiring Fund.  Most importantly, a number of the investment policies and
restrictions that are classified as fundamental for the Acquired Fund are to be
re-classified as non-fundamental for the Acquiring Fund.  See "Comparative
Information About the Acquiring Fund and the Acquired Fund -- Investment
Objectives, Policies and Restrictions."

      The portfolio of the Acquired Fund is expected to be suitable for the
Acquiring Fund, and so no significant realignment of that portfolio is expected
in connection with the Reorganization.

PURCHASES AND EXCHANGES.  Shares of the Acquired Fund are, and Class C shares
will be, available through certain authorized dealers at the public offering
price, which is the net asset value per share.  See "Information About the
Reorganization -- Shares of the Acquiring Fund."  Shareholders of the Acquired
Fund may now exchange their shares for shares of the other nine series of the
Securities Trust and for the shares of Lord Abbett U.S. Government Securities
Money Market Fund, Inc.  It is expected that holders of Class C shares will be
able to exchange their shares for Class C shares of up to 13 other funds and
series managed by Lord Abbett.  Each exchange represents a sale of shares for
which a shareholder may have to recognize a gain or loss under Federal income
tax provisions.

RULE 12B-1 PLAN.  The Acquired Fund has adopted a plan pursuant to Section 12(b)
of the Investment Company Act of 1940 (the "1940 Act") and Rule 12b-1 thereunder
(a "Rule 12b-1 Plan"), under which it pays service and distribution fees at the
time shares are sold not to exceed 1% of the net asset value of such shares and
at each quarter-end after the first anniversary of the sale of shares at an
annual rate not to exceed 1% of the net asset value of such shares then
outstanding.  As part of the Reorganization, the Acquiring Fund will adopt a
Rule 12b-1 Plan applicable to the Class C shares that will be substantially the
same as the Acquired Fund's Rule 12b-1 Plan.  See "Information About the
Reorganization -- Rule 12b-1 Plan".

DIVIDEND POLICIES AND OPTIONS.  The Acquired Fund distributes net investment
income monthly as a dividend.  It also may pay supplemental dividends and
capital gains distributions in December or January and, in the case of the
Acquiring Fund, capital gains may be distributed in November.  The Acquiring
Fund has a similar dividend and distribution policy.  The shareholders of each
Fund may reinvest such dividends and distributions in additional shares at net
asset value or take such amounts in cash.

REDEMPTION PROCEDURES.  The redemption procedures of the Acquired Fund and the
Acquiring Fund are substantially the same.  See the Acquiring Fund Prospectus
under "Redemptions."

TAX CONSIDERATIONS.  The consummation of the Reorganization is subject to
receipt of an opinion of counsel, substantially to the effect that, among other
things, the Reorganization will not cause a gain or loss to be recognized by the
Acquired Fund or its shareholders for federal income tax purposes.  See
"Information about the Reorganization--Federal Income Tax Considerations."

                                       6
<PAGE>
 
RISK FACTORS.  Because of the similarities in the investment objectives of the
Funds, Lord Abbett believes that the relative risks involved in investing in the
Funds can be considered similar.  However, the investment policies and
restrictions of the Acquiring Fund have been made less restrictive compared to
those of the Acquired Fund in order to provide greater flexibility in the future
management of the investment portfolio of the Acquiring Fund.  If the Acquiring
Fund were to take to any significant extent the actions permitted by these less
restrictive policies and restrictions, a result not now anticipated, the risks
of investing in the Acquiring Fund could be greater than those involved in
investing in the Acquired Fund.  See "Comparative Information About the
Acquiring Fund and the Acquired Fund -- Investment Objectives, Policies and
Restrictions" below.


                      INFORMATION ABOUT THE REORGANIZATION


THE PLAN.  On July 12, 1996, assuming the conditions referred to below are
satisfied, the Acquired Fund will transfer all its assets to the Acquiring Fund
(the date of such transfer is referred to herein as the "Closing Date") in
exchange for (i) Class C shares of the Acquiring Fund having an aggregate net
asset value equal to the aggregate value of the assets, less liabilities, of the
Acquired Fund and (ii) the assumption by the Acquiring Fund of all the
liabilities of the Acquired Fund.  The Acquired Fund will distribute as of the
Closing Date such Class C shares pro-rata to its shareholders of record,
determined as of the close of business on the Closing Date, in exchange for
their shares of the Acquired Fund.  The net asset value of Class C shares and
the value of the Acquired Fund's assets and the amount of its liabilities will
be determined as of the Closing Date in accordance with the valuation procedures
set forth in the Investment Trust's Declaration and Agreement of Trust (see
"Purchases" in the Acquiring Fund Prospectus).  The valuation procedures used by
the Acquiring Fund are the same as those used by the Acquired Fund.

      The obligations of the Acquiring Fund and the Acquired Fund to consummate
the Reor ganization are subject to the satisfaction of certain conditions
precedent, including (a) approval and authorization of the Reorganization by the
vote of a majority of the shares of the Acquired Fund voted on the matter if a
quorum is present, (b) receipt of a favorable ruling from the Internal Revenue
Service to the effect that the issuance of various classes of shares by the
Acquiring Fund will not result in dividends or distributions of the Acquiring
Fund constituting "preferential dividends" under the Internal Revenue Code of
1986, as amended (the "Code"), (c) a favorable opinion of legal counsel as to
the federal income tax consequences of the proposed transaction as described
below under "Federal Income Tax Considerations", and (d) approval by the
shareholders of the Acquiring Fund of an amendment to its Declaration and
Agreement of Trust authorizing the creation of additional classes of shares.

      The foregoing summary of the Plan does not purport to be complete, and is
subject in all respects to the provisions of, and is qualified in its entirety
by reference to, the Plan, a copy of which is attached as Exhibit A.

REASONS FOR THE REORGANIZATION.  The Board of Trustees of the Securities Trust
and the Board of Trustees of the Investment Trust, including in each case a
majority who are not "interested persons" (as defined in the 1940 Act) of either
Fund or of Lord Abbett, approved the Plan and the Reorganization on

                                       7
<PAGE>
 
March 14, 1996, and in this connection determined that participation in the
proposed Reorganization is in the best interests of the shareholders of each of
the Funds and that the interests of existing shareholders of the Funds will not
be diluted as a result of the Reorganization.  In doing so, the boards of the
two Funds considered several factors, including that (a) the shareholders of the
Acquired Fund are expected to benefit from economies of scale as shareholders of
the larger Acquiring Fund, while continuing to invest in a portfolio of
securities managed by Lord Abbett under a substantially similar investment
objective, and (b) implementation of a multi-class fund structure for the
Acquiring Fund is expected to (i) enable investors in the Acquiring Fund to
choose the distribution option that best suits their individual situations, (ii)
facilitate distribution of the Acquiring Fund's shares, and (iii) maintain the
competitive position of the Acquiring Fund in relation to other funds that have
implemented or are seeking to implement similar distribution arrangements.

      The trustees of the Securities Trust and the trustees of the Investment
Trust are the same individuals.

SHARES OF THE ACQUIRING FUND.  On or before the Closing Date, the Acquiring Fund
will have two classes of shares, Class A shares (the existing class of the
Acquiring Fund) and Class C shares (to be received by the shareholders of the
Acquired Fund in the Reorganization).  Each share of the Acquiring Fund,
regardless of class, will share pro-rata (based on net asset value) in the
portfolio and income of the Acquiring Fund and in the Acquiring Fund's expenses,
except for differences in expenses resulting from different Rule 12b-1 Plans for
the classes and certain other class specific expenses.  See "Rule 12b-1 Plans"
below.  After the Reorganization, Class C shares will be offered at net asset
value without an initial sales charge but if redeemed for cash before the first
anniversary of purchase, will be subject to a contingent deferred reimbursement
charge (a "CDRC") equal to 1% of the lower of their cost or then net asset
value.  Holding periods for shares purchased prior to the Reorganization will
carry over for the purpose of determining the applicability of the CDRC.

      After the Closing Date, the Acquiring Fund may create and issue one or
more classes of shares in addition to the Class A and C shares.

      Shares of all classes of the Acquiring Fund will vote together on all
matters affecting the Acquiring Fund, except for matters, such as approval of a
Rule 12b-1 Plan, affecting only a particular class or classes.  All shares
voting on a matter will have identical voting rights.  All issued shares of the
Acquiring Fund are fully paid and non-assessable, and shareholders have no
preemptive or other right to subscribe to any additional shares.  All shares
within a series will have the same rights and be subject to the same limitations
with respect to dividends, redemptions and liquidation except for differences
resulting from class-specific Rule 12b-1 plans and related service plans and
certain other class-specific expenses.

RULE 12B-1 PLANS.  The Acquiring Fund is adopting a Rule 12b-1 Plan for the
Class C shares (the "Class C 12b-1 Plan") substantially the same as the plan
currently in effect for the Acquired Fund.  The Acquired Fund's plan provides
for payments to dealers through Lord Abbett of distribution and service fees (a)
at the time shares are sold, not to exceed 0.75% and 0.25%, respectively, of the
net asset value of the shares sold and (b) at the end of the quarter following
the first anniversary of the sale of shares, and quarterly thereafter, at an
annual rate not to exceed 0.75% and 0.25%, respectively, of the net asset

                                       8
<PAGE>
 
value of such shares, including any shares issued for reinvested dividends and
distributions after such first anniversary, so long as such shares remain
outstanding.  Lord Abbett may retain from the quarterly distribution fee, for
the payment of distribution expenses incurred directly by it, an amount not to
exceed 0.10% of the average annual net asset value of such shares outstanding.
See the Acquired Fund Prospectus under "Purchases" for additional information
concerning the Rule 12b-1 Plan of the Acquired Fund.

      There are two substantive changes in the Class C 12b-1 Plan: First,
                                                                   ----- 
payments under the plan may be made to all institutions and persons permitted by
applicable law and/or rules to receive such payments ("Authorized
Institutions"), rather than just to dealers, as is the case under the Acquired
Fund's Rule 12b-1 Plan; and Second, the other party to the Class C 12b-1 Plan is
                            ------                                              
to be Lord Abbett Distributor, LLC, a New York limited liability company, to be
formed as a subsidiary of Lord Abbett ("Lord Abbett Distributor"), rather than
Lord Abbett itself.  Lord Abbett Distributor will take on all the underwriting
functions currently performed directly by Lord Abbett.

      The Acquiring Fund will pay smaller Rule 12b-1 distribution and service
fees in connection with the Class A shares.  However, the Acquiring Fund will
sell those shares subject to an initial sales charge (see the Acquiring Fund
Prospectus under "Purchases").  The Acquired Fund does not impose, and the
Acquiring Fund will not impose with respect to the Class C shares, an initial
sales charge.

      The Class C 12b-1 Plan was approved on March 14, 1996, by the trustees of
the Investment Trust, including a majority of the trustees who are not
"interested persons" of the Investment Trust or the Acquiring Fund within the
meaning of the 1940 Act and who will have no direct or indirect financial
interest in the operations of such plan or in any agreements related thereto.
Prior to the Reorganization, the Acquired Fund will purchase one Class C share,
and as sole shareholder, will approve the Class C 12b-1 Plan prior to that class
being issued to the Acquired Fund in the Reorganization.  A vote in favor of the
Reorganization will be deemed also to be a vote to authorize the Acquired Fund
to take such action.

FEDERAL INCOME TAX CONSIDERATIONS.  The consummation of the Reorganization is
conditioned upon the receipt of an opinion of Debevoise & Plimpton, legal
counsel to the Acquiring Fund and the Acquired Fund, substantially to the effect
that, for Federal income tax purposes:

   (a) no gain or loss will be recognized by the Acquired Fund upon the transfer
of the Acquired Fund's assets to the Acquiring Fund in exchange for Class C
shares and the assumption by the Acquiring Fund of the liabilities of the
Acquired Fund or upon the distribution of the Class C shares to the Acquired
Fund's shareholders;

   (b) no gain or loss will be recognized by the Acquiring Fund upon the receipt
of the assets of the Acquired Fund in exchange for Class C shares and the
assumption by the Acquiring Fund of the liabilities of the Acquired Fund;

   (c) no gain or loss will be recognized by shareholders of the Acquired Fund
upon the exchange of their Acquired Fund shares for Class C shares;

                                       9
<PAGE>
 
   (d) the aggregate tax basis of the Class C shares received by any Acquired
Fund shareholder pursuant to the Reorganization will be the same as the
aggregate tax basis of the Acquired Fund shares held by such shareholder
immediately prior to the Reorganization, and the holding period for the Class C
shares to be received by any Acquired Fund shareholder will include the period
during which the Acquired Fund shares exchanged therefor were held by such
shareholder (provided that the Acquired Fund shares were held as capital assets
on the date of the Reorganization); and

   (e) the tax basis of the Acquired Fund's assets acquired by the Acquiring
Fund will be the same as the tax basis of such assets to the Acquired Fund
immediately prior to the Reorganization, and the holding period of the assets of
the Acquired Fund in the hands of the Acquiring Fund will include the period
during which those assets were held by the Acquired Fund.

      The Funds have not sought a tax ruling from the Internal Revenue Service
with respect to the tax consequences of the Reorganization, but will act in
reliance upon the opinion of counsel.  Such opinion is not binding on the
Internal Revenue Service.  Since the foregoing discussion relates only to the
general Federal income tax consequences of the Reorganization, shareholders
should also consult their tax advisors as to any state or local tax consequences
of the Reorganization to them and any special circumstances that may apply in
their individual circumstances.

EXPENSES OF THE REORGANIZATION.  Expenses of the Reorganization, including legal
and accounting expense, the costs of proxy solicitation and the preparation of
this Prospectus and Proxy Statement, will be borne by __________.  If the
Reorganization is consummated, the expenses of the Acquired Fund, to the extent
not paid prior to the Closing Date, will be assumed by the Acquiring Fund and
taken into account in determining the net assets of the Acquired Fund for the
purpose of calculating the number of Class C shares to be issued to the Acquired
Fund.

CAPITALIZATION.  The following table sets forth the capitalization of the
Acquiring Fund and the Acquired Fund as of December 31, 1995, and the pro-forma
capitalization of the Acquiring Fund as if the Reorganization had occurred on
that date:
<TABLE>
<CAPTION>
                                                                      CLASS A           CLASS C
                                                                     ACQUIRING         ACQUIRING
                                                                       FUND              FUND
                             ACQUIRING FUND     ACQUIRED FUND       (PRO-FORMA -       (PRO-FORMA -
                              (UNAUDITED)        (UNAUDITED)         UNAUDITED)        UNAUDITED)
                             ---------------    -------------      -------------     -------------
<S>                          <C>                <C>                <C>               <C>
                             (In thousands, except per share values)
- - --------------------------------------------------------------------------------------------------
Net Assets.....................   $6,406            $2,142             $6,406             $2,142
- - --------------------------------------------------------------------------------------------------
Net Asset Value per Share......   $11.09            $11.71             $11.09             $11.09
- - --------------------------------------------------------------------------------------------------
Shares Outstanding:                  577               183                577                193
- - --------------------------------------------------------------------------------------------------
</TABLE>

      The foregoing table reflects a pro-forma exchange ratio of approximately
1.1 Class C shares for each Acquired Fund share.  If the Reorganization is
consummated, the actual exchange ratio may vary from this ratio due to changes
in the market value of the portfolio securities of both the Acquiring Fund

                                       10
<PAGE>
 
and the Acquired Fund between December 31, 1995 and the Closing Date, and
changes in the amounts of undistributed net investment income and accrued
liabilities of the Acquiring Fund and the Acquired Fund during that period.


                       COMPARATIVE INFORMATION ABOUT THE
                     ACQUIRING FUND AND THE ACQUIRED FUND

FEES AND EXPENSES.   Both the Acquiring Fund and the Acquired Fund employ Lord
Abbett as their investment manager.  Under the management agreement between the
Investment Trust and Lord Abbett, the Investment Trust, on behalf of the
Acquiring Fund, pays a monthly fee, based on average daily net assets for each
month, at the annual rate of .75 of 1%.  For the fiscal year ended October 31,
1995, the Acquiring Fund paid Lord Abbett no effective management fee.  This fee
rate reflects a waiver of management fee.  The management fee would have been at
an annual rate of 0.75 of 1% of average daily net assets absent such waiver.
This management agreement will continue in effect following the Reorganization.

      Under the management agreement between the Securities Trust and Lord
Abbett, the Securities Trust, on behalf of the Acquired Fund, is obligated to
pay a monthly fee at the annual rate of  0.5 of 1% of average daily net assets.
For the fiscal year ended October 31, 1995, the Acquired Fund paid Lord Abbett
no effective management fee.  This fee rate reflects a waiver of management
fees.  The management fee would have been 0.75 of 1% of average daily net assets
absent such waiver.  The management agreement provides for the Acquired Fund to
repay Lord Abbett without interest for any expenses of the Acquired Fund paid or
reimbursed by Lord Abbett, as follows: if the Acquired Fund's annual expense
ratio (determined before taking into account any fee waiver or expense payment
or reimbursement by Lord Abbett) is less than 1.95% after the first day of the
calendar quarter after the net assets of the Acquired Fund first reach $50
million (the "commencement date"), the Acquired Fund will repay Lord Abbett an
amount sufficient to increase the expense ratio to 1.95%.  The Acquired Fund is
not obligated to repay any such expenses after the earlier of the termination of
the management agreement or the end of five full fiscal years after the
commencement date.  The contingent obligation to repay such expenses, which
totaled $15,249 as of December 31, 1995, will be extinguished upon the
consummation of the Reorganization.

      As shown above under "Fee Table," the pro-forma expense ratio for the
Class C shares for the year ended October 31, 1995, calculated as if the
Reorganization had occurred at the beginning of such year, was 0.59%, compared
to an expense ratio of 0.22% for the Acquired Fund for such year. If Lord Abbett
had not waived its management fee and subsidized expenses for the Acquired Fund,
the Acquired Fund's expense ratio for such year would have been 2.22%.

INVESTMENT OBJECTIVES, POLICIES AND RESTRICTIONS. The Acquired Fund and
Acquiring Fund have identical investment objectives:  to seek current income and
capital growth.

      The Acquired Fund and the Acquiring Fund have substantially the same
investment policies and restrictions.  However, the Acquiring Fund is seeking
approval of its shareholders to simplify and make less restrictive its
investment policies and restrictions in order to provide greater flexibility in

                                       11
<PAGE>
 
managing its investment portfolio.  A number of the investment policies and
restrictions that are classified as fundamental for the Acquired Fund are to be
re-classified as non-fundamental for the Acquiring Fund. In other instances,
certain fundamental restrictions of the Acquired Fund are to be modified or
eliminated in the case of the Acquiring Fund.  Fundamental investment
restrictions may not be changed without approval of the shareholders of a fund
and the costs of shareholder meetings for these purposes generally are borne by
the fund and its shareholders.  The board may amend a non-fundamental
restriction as it deems appropriate and in the best interest of the fund and its
shareholders, without incurring the costs of seeking a shareholder vote.  The
fundamental restrictions of the Acquiring Fund would permit the following
actions, among others, that are not permitted by the fundamental restrictions of
the Acquired Fund:  (i) short sales of securities and purchases of securities on
                     -                                                          
margin to the extent permitted by applicable law; (ii) borrowings from banks in
                                                   --                          
amounts up to one-third of total assets and such short-term credits as may be
necessary for the clearance of purchases and sales of portfolio securities;
                                                                           
(iii) purchases and sales of commodities and commodity contracts in accordance
 ---                                                                          
with applicable law so long as registration would not be required as a commodity
pool operator under the Commodity Exchange Act; (iv) pledges to secure
                                                 --                   
borrowings or in connection with hedging transactions and other investment
strategies; and (v) investments in the securities of other investment companies.
                 -                                                         
Currently, the Acquiring Fund does not intend to take all such action, but the
Board of Trustees of the Investment Trust believes it would be desirable for the
Acquiring Fund to have the ability to do so in the future without further
shareholder approval if such action was deemed desirable as an appropriate means
of seeking the Acquiring Fund's investment objective.

      A summary comparison of the current investment policies and restrictions
of the Acquired Fund and the Acquiring Fund and of the investment policies of
the Acquiring Fund as proposed to be amended is set forth in Exhibit B to this
Proxy Statement and Prospectus.

      For a full discussion and statement of  the Acquiring Fund's investment
objectives, policies and restrictions, see "Investment Objective" and "How We
Invest" in  the Acquiring Fund Prospectus and "Investment Objective and
Policies" in the Acquiring Fund Statement of Additional Information.  For a full
discussion and statement of the Acquired Fund investment objectives, policies
and restrictions, see "Investment Objective" and "How We Invest" in the Acquired
Fund Prospectus and "Investment Objective and Policies" in the Acquired Fund
Statement of Additional Information.  The summary comparison set forth in
Exhibit B does not purport to be complete, and is subject in all respects to,
and is qualified in its entirety by reference to, such statements of such
policies and restrictions.

SHAREHOLDERS' RIGHTS.   The rights of the Acquired Fund shareholders will not
change in an adverse way as a result of the Reorganization.  After the
Reorganization, the rights of the former shareholders of the Acquired Fund
(Class C shareholders of the Acquiring Fund) will be governed by the Investment
Trust's Declaration and Agreement of Trust, By-Laws and applicable Delaware law
rather than by the Securities Trust's Declaration and Agreement of Trust and By-
Laws and applicable Delaware law.  The operations of the Acquiring Fund will
continue to be subject to the provisions of the 1940 Act and the rules and
regulations of the Commission thereunder.

      The current Board of Trustees of the Investment Trust is comprised of the
same individuals as the current Board of Trustees of the Securities Trust.  The
responsibilities, powers and fiduciary duties of the trustees of the Investment
Trust are substantially the same as those of the trustees of the Securities

                                       12
<PAGE>
 
Trust.  The Trusts' Declarations and Agreements of Trust provide for
indemnification of the trustees against certain liabilities and expenses, except
with respect to (i) any matter as to which any trustee has been adjudicated to
have not acted in good faith in the reasonable belief that his or her action was
in the best interest of the Acquired Fund, or (ii) any liability by reason of
willful misfeasance, bad faith, gross negligence or reckless disregard of
duties.  Trust shareholders may remove a trustee by a vote of two thirds of the
eligible shares.  Income Trust shareholders may remove a director by the vote of
a majority of eligible shares.

      Neither the Acquired Fund nor the Acquiring Fund regularly holds
shareholder meetings.  The By-laws of both Funds provide that a meeting of
shareholders will be held upon the written request of holders of at least 25% of
votes entitled to be cast.

      The foregoing is only a summary of certain rights of the shareholders of
the Acquired Fund and of the rights these shareholders will have following the
Reorganization as holders of Class C shares of the Acquiring Fund.  It is not a
complete description of the Declaration of Trust of the Securities Trust, the
Declaration and Agreement of Trust of the Investment Trust, the  By-Laws of
either Fund or the applicable Delaware law.  Shareholders desiring additional
information about those documents and provisions of law should refer to such
Declaration of Trust, Declaration and Agreement of Trust, By-Laws and
provisions.

      The Board of Trustees of the Securities Trust recommends that shareholders
vote FOR the approval of the proposed Agreement and Plan of Reorganization and
the Reorganization.


                     ITEM 2. - RATIFICATION OR REJECTION OF
                         INDEPENDENT PUBLIC ACCOUNTANTS

      The Board of Trustees of the Securities Trust has selected Deloitte &
Touche LLP as the in dependent public accountants for the Securities Trust for
the fiscal year ending October 31, 1996.  The Act requires that such selection
be submitted for ratification or rejection at the next annual meeting of
shareholders if such meeting be held.  Deloitte & Touche LLP (or a predecessor
firm) acted as the Acquired Fund's independent auditors for the year ended
October 31, 1995, and for a number of years prior thereto.  Based on information
in the possession of the Securities Trust, and information furnished by Deloitte
& Touche LLP, the firm has no direct financial interest and no material indirect
financial interest in the Securities Trust.  A representative of Deloitte &
Touche LLP is expected to attend the annual meeting and will be provided with an
opportunity to make a statement and answer appropriate questions.

      The Board of Trustees of the Securities Trust recommends that shareholders
vote to ratify the selection of Deloitte & Touche LLP as the Securities Trust's
independent public accountants for the fiscal year ending October 31, 1996.

                                       13
<PAGE>
 
                            ADDITIONAL INFORMATION

      To the knowledge of the Acquiring Fund and the Securities Trust, as of
March 22, 1996, no person owned of record or beneficially 5% or more of the
outstanding shares of the Investment Trust, the Acquiring Fund, the Acquired
Fund or the Securities Trust.  As of December 31, 1995, the trustees and
officers of the Investment Trust, as a group, and the trustees and officers of
the Securities Trust, as a group, owned less than 1% of the outstanding shares
of each of the Acquiring Fund, the Acquired Fund and the Securities Trust.

      The Investment Trust and the Securities Trust (of which the Acquired Fund
is a series) are subject to the informational requirements of the Securities
Exchange Act of 1934 and in accordance therewith file reports, proxy statements
and other information with the Securities and Exchange Commission.  Such
reports, proxy statements and other information filed by such entities can be
inspected and copied at the public reference facilities of the Commission at
Room 1024, 450 Fifth Street, N.W., Washington, D.C., and at the Northeast
Regional Office in New York, 7 World Trade Center, 13th Floor, New York, New
York.  Copies of such material can also be obtained by mail from the Public
Reference Branch, Office of Consumer Affairs and Information Services,
Securities and Exchange Commission,  Washington, D.C. 20549 at prescribed rates.

                                       14
<PAGE>
 
                                                      Draft-February 24, 1996
                                                                    Exhibit A
                                                                    ---------





                     AGREEMENT AND PLAN OF REORGANIZATION

     THIS AGREEMENT AND PLAN OF REORGANIZATION (the "Agreement") is made as of
this      day of        , 1996, by and between the Lord Abbett Investment Trust
(the "Investment Trust"), a Delaware business trust, on behalf of its series the
Balanced Series (the "Acquiring Fund") and Lord Abbett Securities Trust (the
"Securities Trust"), a Delaware business trust, on behalf of its series Lord
Abbett Balanced Trust (the "Acquired Fund").

     WHEREAS, this Agreement is intended to be and is adopted as a plan of
reorganization and liquidation within the meaning of Section 368(a)(1)(C) of the
United States Internal Revenue Code of 1986, as amended (the "Code");

     WHEREAS, the reorganization (the "Reorganization") will consist of the
transfer of all of the assets of the Acquired Fund in exchange for Class C
shares of capital stock of the Acquiring Fund (the "Acquiring Fund Class C
Shares" and each an "Acquiring Fund Class C Share") and the assumption by the
Acquiring Fund of all of the liabilities of the Acquired Fund and the
distribution, after the Closing Date herein referred to, of Acquiring Fund Class
C Shares to the shareholders of the Acquired Fund in termination of the Acquired
Fund, all upon the terms and conditions hereinafter set forth in this Agreement;

     WHEREAS, the Securities Trust and the Investment Trust are open-end,
registered investment companies of the management type;

     WHEREAS, the Acquiring Fund is a series of the Investment Trust;

     WHEREAS, the Acquired Fund is a series of the Securities Trust and the
Acquired Fund owns securities that generally are of the character in which the
Acquiring Fund is permitted to invest;

     WHEREAS, the Acquiring Fund is authorized to issue and currently has
outstanding a single class of shares (the "Acquiring Fund Class A Shares"), and
prior to the consummation of the Reorganization, will seek to amend its
Declaration and Agreement of Trust to provide for the authorization and issuance
of shares of additional classes of shares, including Acquiring Fund Class C
Shares, which will share pro rata with each other class in the portfolio, income
and expenses of the Acquiring Fund, except that each class will bear the expense
of its own distribution and shareholder servicing arrangements and certain other
expenses;
<PAGE>
 
     WHEREAS, after the multiple class share structure is authorized by the
Acquiring Fund but before the Acquiring Fund Class C Shares are issued to the
Acquired Fund pursuant to the Reorganization, the Acquired Fund is to purchase
one Acquiring Fund Class C share and as sole shareholder approve a plan pursuant
to Section 12(b) of the Investment Company Act of 1940 (the "1940 Act") and Rule
12b-1 thereunder (a "Rule 12b-1 Plan") applicable to the Acquiring Fund Class C
Shares;

     WHEREAS, the Board of Trustees, including a majority of the trustees who
are not "interested persons" (as defined under the 1940 Act ), of the Securities
Trust has determined that the Reorganization is in the best interests of the
Acquired Fund's shareholders and that the interests of the existing shareholders
of the Acquired Fund will not be diluted as a result of this transaction; and

     WHEREAS, the Board of Trustees, including a majority of the trustees who
are not "interested persons" (as defined under the 1940 Act) of the Investment
Trust, has determined that the Reorganization is in the best interests of the
Acquiring Fund's shareholders and that the interests of the existing
shareholders of the Acquiring Fund will not be diluted as a result of this
transaction;

     NOW THEREFORE, in consideration of the premises and of the agreements
hereinafter set forth, the parties hereto agree as follows:

1. REORGANIZATION.

     1.1.  Subject to the terms and conditions herein set forth and on the basis
of the representations and warranties contained herein, the Securities Trust
will transfer assets of the Acquired Fund as set forth in paragraph 1.2 to the
Acquiring Fund, and the Acquiring Fund will in exchange therefor, (i) deliver to
                                                                   -            
the Acquired Fund the number of Acquiring Fund Class C Shares, including
fractional Acquiring Fund Class C Shares, determined by dividing the net value
of the Acquired Fund's assets so transferred computed in the manner and as of
the time and date set forth in paragraph 2.1, by the net asset value of one
Acquiring Fund Class A Share, computed in the manner and as of the time and date
set forth in paragraph 2.2; and (ii) to assume all of the liabilities of the
Acquired Fund.  Such transactions shall take place at the closing provided for
in paragraph 3.1 (the "Closing").

     1.2.  (a)  The assets of the Acquired Fund to be acquired by the Acquiring
Fund shall consist of all of its property, including, without limitation, all
cash, securities and dividends or interest receivables and any deferred or
prepaid expenses shown as an asset on the books of the Acquired Fund on the
closing date provided in paragraph 3.1 (the "Closing Date").

                                       2
<PAGE>
 
     (b)  The Acquiring Fund has a list of all of the Acquired Fund's assets as
of the date of execution of this Agreement.  The Acquired Fund has a statement
of the Acquiring Fund's investment objectives, policies and restrictions.  The
Acquired Fund reserves the right to sell any of its securities but will not,
without the prior approval of the Acquiring Fund, acquire any additional
securities other than securities of the type in which the Acquiring Fund is
permitted to invest.  The Acquiring Fund will, within a reasonable time prior to
the Closing Date, furnish the Acquired Fund with a list of the securities, if
any, on the Acquired Fund's list referred to in the first sentence of this
paragraph which do not conform to the Acquiring Fund's investment objectives,
policies and restrictions.  In the event that the Acquired Fund holds any
investments which the Acquiring Fund may not hold, the Acquired Fund will
dispose of such securities prior to the Closing Date.  In addition, if it is
determined that the portfolios of the Acquired Fund and the Acquiring Fund, when
aggregated, would contain investments exceeding certain percentage limitations
imposed upon the Acquiring Fund with respect to such investments, the Acquired
Fund, if requested by the Acquiring Fund, will dispose of and/or reinvest a
sufficient amount of such in vestments as may be necessary to avoid violating
such limitations as of the Closing Date.

     1.3.  As provided in paragraph 3.4, as soon after the Closing Date as is
conveniently practicable, the Acquired Fund will distribute pro rata to the
Acquired Fund's shareholders of record determined as of the close of business on
the Closing Date, the Acquiring Fund Class C Shares it receives pursuant to
paragraph 1.1.  Such distribution will be accomplished by establishing Acquiring
Fund shareholder accounts in the names of each Acquired Fund shareholder,
representing the respective pro rata number of full and fractional Acquiring
Fund Class C Shares due each shareholder. All issued and outstanding shares of
the Acquired Fund will simultaneously be canceled on the books of the Acquired
Fund.  The Acquiring Fund shall not issue certificates representing the
Acquiring Fund Shares in connection with such exchange.

     1.4.  Any transfer taxes payable upon issuance of Acquiring Fund Class C
Shares in a name other than the registered holder of the shares of the Acquired
Fund on the books of the Acquired Fund as of that time shall, as a condition of
such issuance and transfer, be paid by the person to whom such Acquiring Fund
Class C Shares are to be issued and transferred.

     1.5.  The Acquired Fund shall, following the Closing Date and the making of
all distributions pursuant to paragraph 1.3, be terminated by a majority of the
Securities Trust's Trustees' executing an instrument pursuant to Section 5.4 of
the Declaration and Agreement of Trust of the Securities Trust abolishing the
Acquired Fund.  Any reporting responsibility of the Securities Trust with
respect to the

                                       3
<PAGE>
 
Acquired Fund is and shall remain the responsibility of the Securities Trust up
to and including the Closing Date and following the termination of the Acquired
Fund.

2. VALUATION

     2.1.  The net value of the Acquired Fund's assets to be acquired by the
Acquiring Fund hereunder shall be the value of such assets, less the Acquired
Fund's liabilities assumed by the Acquiring Fund, computed as of the close of
regular trading on New York Stock Exchange, Inc. (the "NYSE") on the Closing
Date (such time and date being hereinafter called the "Valuation Date"), using
the valuation procedures set forth in the Investment Trust's Declaration and
Agreement of Trust.

     2.2.  The net asset value of one Acquiring Fund Class A Share shall be the
net asset value per share computed as of the close of regular trading on the
NYSE on the Valuation Date, using the valuation procedures set forth in the
Investment Trust's Declaration and Agreement of Trust.

     2.3.  All computations of value shall be made by the Acquiring Fund and the
Acquired Fund in accordance with the regular practice of the Acquiring Fund.

3.  CLOSING AND CLOSING DATE

     3.1.  The Closing Date shall be July 12, 1996, or such other date as the
parties may agree to in writing.  All acts taking place at the Closing shall be
deemed to take place simultaneously as of the close of business on the Closing
Date unless otherwise provided.  The Closing shall be held as of 5:00 p.m. at
the offices of [specify location in New Jersey], or at such other time and/or
place as the parties may agree.

     3.2.  In the event that on the Valuation Date (a) the NYSE or another
primary trading market for portfolio securities of the Acquiring Fund or the
Acquired Fund shall be closed to trading or trading thereon shall be restricted
or (b) trading or the reporting of trading on the NYSE or elsewhere shall be
disrupted so that accurate appraisal of the value of the net assets of the
Acquiring Fund or the Acquired Fund is impracticable, the Closing Date shall be
postponed until the first business day after the day when trading shall have
been fully resumed and reporting shall have been restored.

     3.3.  At the Closing, the Acquired Fund shall direct its custodian to
deliver to the custodian of the Acquiring Fund, for the Acquiring Fund's
account, all of its portfolio securities and other assets held by such custodian
for the Acquired

                                       4
<PAGE>
 
Fund's account, duly endorsed in proper form for transfer as appropriate, in
such condition as to constitute good delivery thereof in accordance with the
custom of the Acquiring Fund's custodian, and shall be accompanied by all
necessary federal and state stock transfer stamps or a check for the appropriate
purchase price thereof.

     3.4.  The Acquired Fund shall direct its transfer agent to deliver to the
transfer agent of the Acquiring Fund on the Closing Date a list of the names and
addresses of the Acquired Fund's shareholders and the number of outstanding
shares owned by each such shareholder immediately prior to the Closing.  The
Acquiring Fund shall direct its transfer agent to issue and deliver a
confirmation evidencing the Acquiring Fund Class C Shares to be credited to the
Acquired Fund's account on the Closing Date to the transfer agent of the
Acquired Fund, or provide evidence satisfactory to the Acquired Fund that such
Acquiring Fund Class C Shares have been credited to the Acquired Fund's account
on the books of the Acquiring Fund.  At the Closing, each party shall deliver to
the other such bills of sale, checks, assignments, share certificates, if any,
receipts, assumption agreements or other documents as such other party or its
counsel may reasonably request.

4. REPRESENTATION AND WARRANTIES

     4.1.  With respect to the Acquired Fund, the Securities Trust represents
and warrants to the Acquiring Fund as follows:

     (a)  The Securities Trust is a registered investment company classified as
   a management company of the open-end type, and its registration with the
   Securities and Exchange Commission (the "Commission") as an investment
   company under the 1940 Act is in full force and effect.

     (b)  The Acquired Fund is a series of the Securities Trust.  The Securities
   Trust is duly organized, validly existing and in good standing under the laws
   of the State of Delaware and has the power to own all of its properties and
   assets and to carry out this Agreement.

     (c)  The current prospectus and statement of additional information of the
   Securities Trust conform (and any prospectus or statement of additional
   information of the Securities Trust issued prior to the Closing Date will
   conform) in all material respects to the applicable requirements of the
   Securities Act of 1933 Act, as amended (the "1933 Act"), and the 1940 Act and
   the rules and regulations of the Commission thereunder and do not (and will
   not) include any untrue statement of a material fact or omit to state any
   material fact required to be stated therein or necessary to make the
   statements

                                       5
<PAGE>
 
   therein, in light of the circumstances under which they were (and will be)
   made, not materially misleading.

     (d)  The Securities Trust is not, and the execution, delivery and
   performance of this Agreement will not result in, a material violation of its
   Declaration and Agreement of Trust or By-laws or of any agreement,
   instrument, contract or other undertaking to which the Securities Trust is a
   party or by which it is bound.

     (e)  The Securities Trust has no material contracts or other commitments
   which will be terminated with liability to the Securities Trust on, prior to
   or after the Closing Date.

     (f)  Except as otherwise disclosed in writing to and accepted by the
   Acquiring Fund, no litigation or administrative proceeding or investigation
   before any court or governmental body is presently pending or to its
   knowledge threatened against the Securities Trust or any of the Acquired
   Fund's properties or assets, which if adversely determined would materially
   and adversely affect the financial condition of the Acquired Fund or the
   conduct of the Acquired Fund's business. The Securities Trust knows of no
   facts which might form the basis of the institution of such a proceeding and
   is not party to or subject to the provisions of any order, decree or judgment
   of any court or governmental body which materially and adversely affects the
   business of the Acquired Fund or the ability of the Securities Trust to
   consummate the transactions contemplated herein.

     (g)  True and correct copies of the Acquired Fund's (i) Statement of Net
                                                          -
   Assets as at October 31, 1995 and (ii) Statements of Operations and Changes
                                      --
   in Net Assets for the 12-month period then ended, including the accompanying
   notes, have been furnished to the Acquiring Fund. Such Statement of Net
   Assets and such Statements of Operations and Changes in Net Assets (and the
   accompanying notes) have been audited by Deloitte & Touche LLP, independent
   certified public accountants. Such statements have been prepared in
   accordance with generally accepted accounting principles consistently
   applied, and such statements fairly reflect the financial condition and the
   operations and changes in net assets of the Acquired Fund as of such date and
   for such period, respectively. There are no known contingent liabilities of
   the Acquired Fund as of such date required to be reflected or disclosed in
   such Statement of Net Assets or notes in accordance with generally accepted
   accounting principles that are not so reflected or disclosed.

                                       6
<PAGE>
 
     (h)  Since October 31, 1995, there has not been any material adverse change
   in the Acquired Fund's financial condition, assets, liabilities or business
   other than changes occurring in the ordinary course of business, or any
   incurrence by the Acquired Fund of indebtedness maturing more than one year
   from the date such indebtedness was incurred, except as otherwise disclosed
   to and accepted by the Acquiring Fund.

     (i)  The Securities Trust will file the final federal and other tax returns
   of the Acquired Fund for the period ending on the Closing Date in accordance
   with the Code. At the Closing Date, all federal and other tax returns and
   reports of the Acquired Fund required by law to have been filed prior to the
   Closing Date shall have been filed, and all federal and other taxes shown as
   due on such returns shall have been paid, or provision shall have been made
   for the payment thereof, and to the best of the Securities Trust's knowledge,
   no such return is currently under audit and no assessment has been asserted
   with respect to such returns.

     (j)  For the most recent fiscal year of its operation, the Acquired Fund
   has met the requirements of Subchapter M of the Code for qualification and
   treatment as a regulated investment company.

     (k)  All issued and outstanding shares of the Acquired Fund are, and at the
   Closing Date will be, duly and validly issued and outstanding, fully paid and
   non-assessable. All of the issued and outstanding shares of the Acquired Fund
   will, at the time of Closing, be held of record by the persons and in the
   amounts set forth in the records of the transfer agent as provided in
   paragraph 3.4. The Acquired Fund does not have outstanding any options,
   warrants or other rights to subscribe for or purchase any shares of the
   Acquired Fund, nor is there outstanding any security convertible into any
   shares of the Acquired Fund.

     (l)  At the Closing Date, the Acquired Fund will have good and marketable
   title to its assets to be transferred to the Acquiring Fund pursuant to
   paragraph 1.1 and full right, power and authority to sell, assign, transfer
   and deliver such assets hereunder and, upon delivery and payment for such
   assets, the Acquiring Fund will acquire good and marketable title thereto,
   subject to no restrictions on the full transfer thereof, including such
   restrictions as might arise under the 1933 Act, other than as disclosed to
   the Acquiring Fund prior to the date hereof.

                                       7
<PAGE>
 
     (m)  The execution, delivery and performance of this Agreement has been
   duly authorized by all necessary action on the part of Securities Trust's
   Trustees, and subject to the due approval of the Acquired Fund's
   shareholders, this Agreement, assuming due authorization, execution and
   delivery by the Acquiring Fund, constitutes a valid and binding obligation of
   the Securities Trust on behalf of the Acquired Fund, enforceable in
   accordance with its terms, subject as to enforcement to bankruptcy,
   insolvency, reorganization, moratorium and other laws relating to or
   affecting creditors' rights and to general equity principles. The Securities
   Trust's Board of Trustees has called a meeting of the Securities Trust's
   shareholders at which the shareholders of the Acquired Fund are to consider
   and act upon this Agreement.

     (n)  The information furnished and to be furnished by the Securities Trust
   on behalf of the Acquired Fund for use in registration statements, proxy
   materials and other documents which may be necessary in connection with the
   transactions contemplated hereby shall be accurate and complete in all
   material respects and shall comply in all material respects with federal
   securities and other laws and regulations thereunder applicable thereto.

     (o)  The combined prospectus and proxy statement (the "N-14 prospectus and
   proxy statement") and the related statement of additional information
   included in the Registration Statement on Form N-14 of the Acquiring Fund
   (the "N-14 Registration Statement") did not on the effective date of the N-14
   Registration Statement contain any untrue statement of a material fact
   relating to the Acquired Fund or the meeting of the Securities Trust
   shareholders referred to therein or omit to state a material fact required to
   be stated therein or necessary to make the statements therein relating to the
   Acquired Fund or such special meeting, in light of the circumstances under
   which such statements were made, not materially misleading.

     (p)  The Acquiring Fund Class C Shares to be issued to the Acquired Fund
   hereunder are not being acquired for the purpose of making any distribution
   thereof other than in accordance with the terms of this Agreement.

     4.2.  With respect to the Acquiring Fund, the Investment Trust represents
and warrants to the Acquired Fund as follows:

     (a)  The Investment Trust is a registered investment company classified as
   a management company of the open-end type, and its registration with the
   Commission as an investment company under the 1940 Act is in full force and
   effect.

                                       8
<PAGE>
 
     (b)  The Acquiring Fund is a series of the Investment Trust.  The
   Investment Trust is a business trust duly organized, validly existing and in
   good standing under the laws of the State of Delaware and has the power to
   own all of its properties and assets and to carry out this Agreement.

     (c)  The current prospectus and statement of additional information of the
   Investment Trust conform (and any prospectus or statement of additional
   information of the Investment Trust issued prior to the Closing Date will
   conform) in all material respects to the applicable requirements of the 1933
   Act and the 1940 Act and the rules and regulations of the Commission
   thereunder and do not (and will not) include any untrue statement of a
   material fact or omit to state any material fact required to be stated
   therein or necessary to make the statements therein, in light of the
   circumstances under which they were (or will be) made, not materially
   misleading.

     (d)  The Investment Trust is not, and the execution, delivery and
   performance of this Agreement will not result in, a material violation of its
   Declaration and Agreement of Trust or By-laws or of any agreement,
   instrument, contract or other undertaking to which the Investment Trust is a
   party or by which it is bound.

     (e)  The Investment Trust has no material contracts or other commitments
   which will be terminated with liability to the Investment Trust on, prior to
   or after the Closing Date.

     (f)  Except as otherwise disclosed in writing to and accepted by the
   Acquired Fund, no litigation or administrative proceeding or investigation
   before any court or governmental body is presently pending or to its
   knowledge threatened against the Investment Trust or any of the Acquiring
   Fund's properties or assets, which, if adversely determined, would materially
   and adversely affect its financial condition or the conduct of its business.
   The Investment Trust knows of no facts which might form the basis of the
   institution of such a proceeding and is not party to or subject to the
   provisions of any order, decree or judgment of any court or governmental body
   which materially and adversely affects its business or its ability to
   consummate the transactions contemplated herein.

     (g)  True and correct copies of the Acquiring Fund's (i) Statement of Net
                                                           -
   Assets as at October 31, 1995, and (ii) Statements of Operation and Changes
                                       --
   in Net Assets for the 12-month period then ended, including the accompanying
   notes, have been furnished to the Securities Trust. Such

                                       9
<PAGE>
 
   Statement of Net Assets and such Statements of Operations and Changes in Net
   Assets (and the accompanying notes) have been audited by Deloitte & Touche
   LLP, independent certified public accountants. Such statements have been
   prepared in accordance with generally accepted accounting principles
   consistently applied, and such statements fairly reflect the financial
   condition and the operations and changes in net assets of the Acquiring Fund
   as of such date and for such period, respectively. There are no known
   contingent liabilities of the Acquiring Fund as of such date required to be
   reflected or disclosed in such Statements of Net Assets or notes in
   accordance with generally accepted accounting principles that are not so
   reflected or disclosed.

     (h)  Since October 31, 1995, there has not been any material adverse change
   in the Acquiring Fund's financial condition, assets, liabilities or business
   other than changes occurring in the ordinary course of business, or any
   incurrence by the Acquiring Fund of indebtedness maturing more than one year
   from the date such indebtedness was incurred, except as otherwise disclosed
   to and accepted by the Acquired Fund.

     (i)  At the Closing Date, all federal and other tax returns and reports of
   the Investment Trust required by law to have been filed prior to the Closing
   Date shall have been filed, and all federal and other taxes shown as due on
   such returns and reports shall have been paid, or provision shall have been
   made for the payment thereof, and to the best of the Acquiring Fund's
   knowledge, no such return is currently under audit and no assessment has been
   asserted with respect to such returns.

     (j)  For the most recent fiscal year of its operation, the Acquiring Fund
   has met the requirements of Subchapter M of the Code for qualification and
   treatment as a regulated investment company and the Acquiring Fund intends to
   do so in the future.

     (k)  All issued and outstanding shares of the Acquiring Fund are, and at
   the Closing Date will be, duly and validly issued and outstanding, fully paid
   and non-assessable, with no personal liability attaching to the ownership
   thereof. The Acquiring Fund does not have outstanding any options, warrants
   or other rights to subscribe for or purchase any shares of the Acquiring
   Fund, nor is there outstanding any security convertible into shares of the
   Acquiring Fund.

     (l)  At the Closing Date, the Acquiring Fund will have good and marketable
   title to the Acquiring Fund's assets.

                                      10
<PAGE>
 
     (m)  The execution, delivery and performance of this Agreement has been
   duly authorized by all necessary action on the part of the Investment Trust's
   Board of Trustees, and assuming due authorization, execution and delivery by
   the Acquired Fund, this Agreement constitutes a valid and binding obligation
   of the Investment Trust on behalf of the Acquiring Fund, enforceable in
   accordance with its terms, subject as to enforcement to bankruptcy,
   insolvency, reorganization, moratorium and other laws relating to or
   affecting creditors' rights and to general equity principles.

     (n)  The N-14 Registration Statement (except insofar as it relates to the
   Acquired Fund or the special meeting of its shareholders referred to therein)
   did not on the effective date of the N-14 Registration Statement contain any
   untrue statement of a material fact or omit to state a material fact required
   to be stated therein or necessary to make the statements therein, in light of
   the circumstances under which such statements were made, not materially
   misleading.

     (o)  The Acquiring Fund Class C Shares to be issued and delivered to the
   Acquired Fund pursuant to the terms of this Agreement have been duly
   authorized by the Board of Trustees of the Investment Trust, and, when issued
   and delivered at the Closing in accordance with this Agreement, will be duly
   and validly issued Acquiring Fund Class C Shares and will be fully paid and
   non-assessable with no personal liability attaching to the ownership thereof.

     (p)  The Board of Trustees of the Investment Trust has duly adopted a
   resolution (a copy of which has been furnished to the Securities Trust)
   authorizing the creation and issuance of Acquiring Fund Class C Shares.

5.  COVENANTS

     5.1.  The Acquiring Fund and the Acquired Fund each will operate its
business in the ordinary course between the date hereof and the Closing Date.
It is understood that such ordinary course of business will include the
declaration and payment of customary dividends and distributions and any other
dividends and distributions deemed advisable.

     5.2.  After the amendment to the Investment Trust's Declaration and
Agreement of Trust referred to in paragraph 4.2(p) has been duly approved by the
shareholders of the Investment Trust, the Investment Trust will duly file the
same with the Secretary of State of the State of Delaware.

                                      11
<PAGE>
 
     5.3.  At or after the Closing, the Securities Trust will deliver or
otherwise make available to the Investment Trust a statement of the Acquired
Fund's assets and liabilities, together with a list of the Acquired Fund's
portfolio securities showing the tax costs of such securities to it and the
holding periods of such securities, as of the Closing Date.

     5.4.  The Acquired Fund will assist the Acquiring Fund in obtaining such
information as the Acquiring Fund reasonably requests concerning the beneficial
ownership of the Acquired Fund's shares.

     5.5.  Subject to the provisions of this Agreement, the Acquired Fund and
the Acquiring Fund each will take, or cause to be taken, all action, and do or
cause to be done all things, reasonably necessary, proper or advisable to
consummate and make effective the transactions contemplated by this Agreement.

     5.6.  Prior to the Closing Date, the Board of Trustees of the Securities
Trust will declare such dividends and distributions, payable no later than [90]
days after the Closing Date, to shareholders of record of the Acquired Fund as
of the Closing Date, which, together with all such previous dividends and
distributions, shall have the effect of distributing to the shareholders of the
Acquired Fund all of the investment company taxable income and exempt-interest
income of the Acquired Fund for all taxable years ending on or prior to the
Closing Date.  The dividends and distributions declared by the Acquired Fund
shall also include all of the Acquired Fund's net capital gain realized in all
taxable years ending on or prior to the Closing Date (after reduction for any
capital loss carry forward).  Such dividends and distributions declared prior to
the Closing Date shall be paid by the Acquiring Fund no later than [90] days
after the Closing Date.

     5.7.  As promptly as practicable, but in any case within sixty days after
the Closing Date, the Acquired Fund shall furnish the Acquiring Fund, in such
form as is reasonably satisfactory to the Acquiring Fund, a statement of the
earnings and profits of the Acquired Fund for federal income tax purposes which
will be carried over to the Acquiring Fund as a result of Section 381 of the
Code.

     5.8.  The Acquired Fund will provide the Acquiring Fund with any additional
information reasonably necessary for any revision of the N-14 Prospectus and
Proxy Statement referred to in paragraph 4.1(o), all to be included in any
amendment to the N-14 Registration Statement, in compliance with the 1933 Act,
the Securities Exchange Act of 1934 (the "1934 Act") and the 1940 Act in
connection with the meeting of the Acquired Fund's shareholders to consider
approval of this Agreement and the Reorganization.

                                      12
<PAGE>
 
6.  CONDITIONS PRECEDENT TO OBLIGATIONS OF THE SECURITIES TRUST

     The obligations of the Securities Trust, on behalf of the Acquired Fund, to
consummate the transactions provided for herein shall be subject, at its
election, to the performance by the Investment Trust in all material respects of
all of the obligations to be performed by it hereunder on or before the Closing
Date and, in addition thereto, the following further conditions:

     6.1.  All representations and warranties of the Investment Trust contained
in this Agreement shall be true and correct in all material respects as of the
date hereof and, except as they may be affected by the transactions contemplated
by this Agreement, as of the Closing Date with the same force and effect as if
made on and as of the Closing Date.

     6.2.  The Acquiring Fund shall have delivered to the Acquired Fund a
certificate executed in its name by its Chairman, President or a Vice President
and its Treasurer or an Assistant Treasurer, in form reasonably satisfactory to
the Acquired Fund and dated as of the Closing Date, to the effect that the
representations and warranties of the Investment Trust made in this Agreement
are true and correct at and as of the Closing Date, except as they may be
affected by the transactions contemplated by this Agreement.

7.  CONDITIONS PRECEDENT TO OBLIGATIONS OF THE INVESTMENT TRUST

     The obligations of the Investment Trust, on behalf of the Acquiring Fund,
to consummate the transactions provided for herein shall be subject, at its
election, to the performance by the Securities Trust in all material respects of
all the obligations to be performed by it hereunder on or before the Closing
Date and, in addition thereto, the following further conditions:

     7.1.  All representations and warranties of the Securities Trust contained
in this Agreement shall be true and correct in all material respects as of the
date hereof and, except as they may be affected by the transactions contemplated
by this Agreement, as of the Closing Date with the same force and effect as if
made on and as of the Closing Date.

     7.2.  The Securities Trust shall have delivered to the Acquiring Fund on
the Closing Date a certificate executed in its name by its Chairman, President
or a Vice President and its Treasurer or an Assistant Treasurer, in form and
substance

                                      13
<PAGE>
 
satisfactory to the Acquiring Fund and dated as of the Closing Date, to the
effect that the representations and warranties of the Securities Trust made in
this Agreement are true and correct at and as of the Closing Date, except as
they may be affected by the transactions contemplated by this Agreement.

8.  FURTHER CONDITIONS PRECEDENT TO OBLIGATIONS OF THE SECURITIES TRUST AND THE
    INVESTMENT TRUST

     If any of the conditions set forth below do not exist on the Closing Date
with respect to the Acquiring Fund or the Acquired Fund, either party to this
Agreement shall, at its option, not be required to consummate the transactions
contemplated by this Agreement:

     8.1.  This Agreement and the transactions contemplated herein shall have
been approved by the requisite vote of the holders of the outstanding shares of
the Acquired Fund in accordance with the provisions of the Securities Trust's
Declaration and Agreement of Trust and By-laws.  Notwithstanding anything herein
to the contrary, neither the Acquiring Fund nor the Acquired Fund may waive the
condi tions set forth in this paragraph 8.1.

     8.2.  On the Closing Date, no action, suit or other proceeding shall be
pending before any court or governmental agency in which it is sought to
restrain or prohibit, or obtain damages or other relief in connection with, this
Agreement or the transactions contemplated herein.

     8.3.  All consents of other parties and all other consents, orders, rulings
and permits of federal, state and local regulatory authorities (including those
of the Commission, the Internal Revenue Service and state Blue Sky and
securities authorities) deemed necessary by the Acquiring Fund or the Acquired
Fund to permit consummation, in all material respects, of the transactions
contemplated hereby shall have been obtained, except where failure to obtain any
such consent, order, ruling or permit would not involve a risk of a material
adverse effect on the assets or properties of the Acquiring Fund or the Acquired
Fund.

     8.4.  The N-14 Registration Statement shall have become effective under the
1933 Act and no stop orders suspending the effectiveness thereof shall have been
issued and, to the best knowledge of the parties hereto, no investigation or
proceeding for that purpose shall have been instituted or be pending, threatened
or contemplated under the 1933 Act.

                                      14
<PAGE>
 
     8.5.  The parties shall have received a favorable opinion of Debevoise &
Plimpton, addressed to the Investment Trust and the Securities Trust and
satisfactory to the Secretary of each such party, substantially to the effect
that for federal income tax purposes:

     (a) the acquisition by the Acquiring Fund of all of the assets of the
   Acquired Fund solely in exchange for the issuance of Acquiring Fund Class C
   Shares to the Acquired Fund and the assumption of all of the Acquired Fund
   liabilities by the Acquiring Fund, followed by the distribution by the
   Acquired Fund, in complete liquidation, of the Acquiring Fund Class C Shares
   to the Acquired Fund shareholders in exchange for their Acquired Fund shares,
   will be treated as a "reorganization" within the meaning of Section 368(a) of
   the Code, and the Acquiring Fund and the Acquired Fund will each be a "party
   to a reorganization" within the meaning of Section 368(b) of the Code;

     (b)  no gain or loss will be recognized by the Acquiring Fund upon the
   receipt of the assets of the Acquired Fund in exchange for the Acquiring Fund
   Shares and the assumption by the Acquiring Fund of liabilities of the
   Acquired Fund;

     (c)  no gain or loss will be recognized by the Acquired Fund upon the
   transfer of the Acquired Fund's assets to the Acquiring Fund in exchange for
   the Acquiring Fund Shares and the assumption by the Acquiring Fund of
   liabilities of the Acquired Fund or upon the distribution of the Acquiring
   Fund Shares to the Acquired Fund's shareholders;

     (d)  no gain or loss will be recognized by shareholders of the Acquired
   Fund upon the exchange of their Acquired Fund shares for the Acquiring Fund
   Shares;

     (e)  the aggregate tax basis for the Acquiring Fund Shares received by each
   of the Acquired Fund's shareholders pursuant to the Reorganization will be
   the same as the aggregate tax basis of the Acquired Fund shares held by such
   shareholder immediately prior to the Reorganization, and the holding period
   of the Acquiring Fund Shares to be received by each Acquired Fund shareholder
   will include the period during which the Acquired Fund shares exchanged
   therefor were held by such shareholder (provided that the Acquired Fund
   shares were held as capital assets on the date of the Reorganization); and

     (f)  the tax basis of the Acquired Fund's assets acquired by the Acquiring
   Fund will be the same as the tax basis of such assets to the

                                      15
<PAGE>
 
   Acquired Fund immediately prior to the Reorganization, and the holding period
   of the assets of the Acquired Fund in the hands of the Acquiring Fund will
   include the period during which those assets were held by the Acquired Fund.

     Notwithstanding anything herein to the contrary, neither the Investment
Trust nor the Securities Trust may waive the conditions set forth in this
paragraph 8.5.

     8.6.  The Acquiring Fund shall have duly adopted a Rule 12b-1 Plan for the
Acquiring Fund Class C Shares acceptable to the Securities Trust.

9. BROKERAGE FEES AND EXPENSES

     9.1.  The Investment Trust represents and warrants to the Acquired Fund,
and the Securities Trust represents and warrants to the Acquiring Fund, that
there are no brokers or finders entitled to receive any payments in connection
with the transactions provided for herein.

     9.2.  Except as may be otherwise provided herein, the Acquiring Fund and
the Acquired Fund each shall pay, or provide for the payment of, the expenses
incurred by it in connection with entering into and carrying out the provisions
of this Agreement.

10. ENTIRE AGREEMENT; SURVIVAL OF WARRANTIES

     10.1.  The parties hereto agree that no party has made any representation,
warranty or covenant not set forth herein and that this Agreement constitutes
the entire agreement between the parties.

     10.2.  None of the representations and warranties  included or provided for
herein shall survive the consummation of the transactions contemplated hereby.

11. TERMINATION

     11.1.  This Agreement may be terminated at any time prior to the Closing
Date:  (1) by the mutual agreement of the Securities Trust and the Investment
Trust; (2) by the Securities Trust in the event that the Investment Trust shall,
or by the Investment Trust in the event that the Securities Trust shall,
materially breach any representation or warranty contained herein or any
agreement contained herein and to be performed at or prior to the Closing Date;
or (3) by either party if a condition

                                      16
<PAGE>
 
herein expressed to be precedent to the obligations of the terminating party has
not been met and it reasonably appears that it will not or cannot be met.

     11.2.  In the event of any such termination, there shall be no liability
for damages on the part of either the Securities Trust, the Investment Trust,
the Acquired Fund or the Acquiring Fund or their respective trustees or officers
to the other party, but the Acquiring Fund and the Acquired Fund shall each
bear, or provide for the payment of, the expenses incurred by it incidental to
the preparation and carrying out of this Agreement as provided in paragraph 9.2.

12. AMENDMENTS; WAIVERS

     12.1.  This Agreement may be amended, modified or supplemented in such
manner as may be mutually agreed upon in writing by the authorized officers of
the Securities Trust and the Investment Trust; provided, however, that following
the approval of the Acquired Fund shareholders referred to in paragraph 8.1, no
such amendment may have the effect of changing the provisions for determining
the number of the Acquiring Fund Class C Shares to be issued to the Acquired
Fund's shareholders under this Agreement to the detriment of such shareholders
without their further approval.

     12.2.  At or at any time prior to the Closing either party hereto may by
written instrument signed by it (i) waive any inaccuracies in the
representations and warranties made to it contained herein and (ii) waive
compliance with any of the covenants or conditions made for its benefit
contained herein.

13. NOTICES

     Any notice, report, statement or demand required or permitted by any
provisions of this Agreement shall be in writing and shall be given by personal
delivery addressed to the Acquired Fund, 767 Fifth Avenue, New York, New York,
10153, Attention: Office of the Secretary; or to the Acquiring Fund, 767 Fifth
Avenue, New York, New York, 10153, Attention: Office of the Secretary.

14. HEADINGS; COUNTERPARTS; GOVERNING LAW; ASSIGNMENT; LIMITATION OF LIABILITY

     14.1.  The article and paragraph headings contained in this Agreement are
for reference purposes only and shall not affect in any way the meaning or
interpretation of this Agreement.

                                      17
<PAGE>
 
     14.2.  This Agreement may be executed in any number of counterparts, each
of which shall be deemed an original.

     14.3.  This Agreement shall be governed by and construed in accordance with
the laws of the State of New York.

     14.4.  (a)  This Agreement shall bind and inure to the benefit of the
parties hereto and their respective successors and assigns, but no assignment or
transfer hereof or of any rights or obligations hereunder shall be made by any
party without the written consent of the other party.  Nothing herein expressed
or implied is intended or shall be construed to confer upon or give any person,
firm, corporation or other entity, other than the parties hereto and their
respective successors and assigns, any rights or remedies under or by reason of
this Agreement.

     (b)  The Acquiring Fund is hereby expressly put on notice of the limitation
of liability as set forth in Article IV of the Declaration and Agreement of
Trust of the Securities Trust and agrees that the obligations assumed by the
Securities Trust pursuant to this Agreement shall be limited in any case to the
Acquired Fund and its assets and the Investment Trust shall not seek
satisfaction of any such obligation from the shareholders of the Securities
Trust, the trustees, officers,

                                      18
<PAGE>
 
employees or agents of the Securities Trust or any of them or from any other
assets of the Securities Trust.

     IN WITNESS WHEREOF, each of the parties hereto has caused this Agreement to
be executed by its Chairman of the Board, President or Vice President and
attested by its Secretary or Assistant Secretary.


Attest:                                 LORD ABBETT SECURITIES TRUST
                                        on behalf of Lord Abbett Balanced Trust



                                         By:   _______________________________
Name:  _____________                            Name:
Title: Secretary                                Title:




Attest:                                  LORD ABBETT INVESTMENT TRUST
                                         on behalf of the Balanced Series




                                         By:   _______________________________
Name:  _____________                            Name:
Title: Secretary                                Title:


                                      19
<PAGE>
 
                                                               EXHIBIT B
                                                               ---------



    COMPARISON OF CURRENT AND PROPOSED INVESTMENT POLICIES AND RESTRICTIONS

      Comparison of certain investment policies and restrictions of Lord Abbett
Balanced Trust (the "Acquired Fund"), a series of Lord Abbett Securities Trust,
and Lord Abbett Investment Trust (the "Acquiring Fund") and proposed revised
investment policies and restrictions of the Acquiring Fund.
<TABLE>
<CAPTION>
 
          POLICY/RESTRICTION OF THE               POLICY/RESTRICTION OF THE                PROPOSED POLICY/RESTRICTION OF
               ACQUIRED FUND                           ACQUIRING FUND                            THE ACQUIRING FUND
               -------------                           --------------                            ------------------  
<S>                                             <C>                                           <C>
- - ------------------------------------------------------------------------------------------------------------------------------------

SHORT SALES/MARGIN.
NON-FUNDAMENTAL                              NON-FUNDAMENTAL                              NON-FUNDAMENTAL
The Fund may not sell short or buy           The Fund may not sell short or buy           The Fund may not make short sales of
on margin, although the Fund may             on margin, although the Fund may             securities or maintain a short position
obtain short-term credit necessary for       obtain short-term credit necessary for       except to the extent permitted by
the purchase of securities.                  the purchase of securities.                  applicable law.
 
                                                                                          FUNDAMENTAL
                                                                                          The Fund may purchase securities on
                                                                                          margin to the extent permitted by
                                                                                          applicable law.
- - ----------------------------------------------------------------------------------------------------------------------------------
BORROWING.
FUNDAMENTAL                                  FUNDAMENTAL                                  FUNDAMENTAL
Subject to certain exceptions, the           Subject to certain exceptions, the           The Fund may not borrow money,
Fund may not borrow money.                   Fund may not borrow money.                   except that (i) the Fund may borrow
                                                                                          from banks (as defined in the 1940
                                                                                          Act) in amounts up to 33 1/3% of its
                                                                                          total assets (including the amount bor-
                                                                                          rowed), (ii) the Fund may borrow up
                                                                                          to an additional 5% of its total assets
                                                                                          for temporary purposes, and (iii) the
                                                                                          Fund may obtain such short-term
                                                                                          credit as may be necessary for the
                                                                                          clearance of purchases and sales of
                                                                                          portfolio securities.
- - ----------------------------------------------------------------------------------------------------------------------------------
UNDERWRITING.                                                                             FUNDAMENTAL
FUNDAMENTAL                                  FUNDAMENTAL                                  The Fund may not engage in the
The Fund may not engage in the               The Fund may not engage in the               underwriting of securities, except,
underwriting of securities, except           underwriting of securities, except           pursuant to a merger or acquisition or
pursuant to a merger or acquisition or       pursuant to a merger or acquisition or       to the extent that, in connection with
to the extent that, in connection with       to the extent that, in connection with       the disposition of its portfolio secur-
the disposition of its portfolio securi-     the disposition of its portfolio securi-     ities, it may be deemed to be an
ties, it may be deemed to be an              ties, it may be deemed to be an              underwriter under federal securities
underwriter under federal securities         underwriter under federal securities         laws.
laws.                                        laws.
- - ----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                       1
<PAGE>
 
<TABLE>
<CAPTION>
 
          POLICY/RESTRICTION OF THE               POLICY/RESTRICTION OF THE                PROPOSED POLICY/RESTRICTION OF
               ACQUIRED FUND                           ACQUIRING FUND                            THE ACQUIRING FUND
               -------------                           --------------                            ------------------  
<S>                                          <C>                                        <C>
- - ------------------------------------------------------------------------------------------------------------------------------------

LENDING.
FUNDAMENTAL                                  FUNDAMENTAL                                  FUNDAMENTAL
The Fund may not lend money or               The Fund may not lend money or               The Fund may not make loans to
securities, except that it may lend          securities, except that it may lend          other persons, except that the acqui-
portfolio securities not in excess of        portfolio securities not in excess of        sition of bonds, debentures or other
30% its total assets, subject to certain     30% its total assets, subject to certain     corporate debt securities and invest-
limitations.  The Acquired Fund also         limitations, and except for time or          ment in government obligations, com-
may enter into certain repurchase            demand deposits with banks and               mercial paper, pass-through instru-
agreements.                                  purchases of commercial paper or             ments, certificates of deposit, bankers
                                             publicly offered debt securities at          acceptances, repurchase agreements
                                             original issue or otherwise.  The            or any similar instruments shall not be
                                             Acquired Fund also may enter into            subject to this limitation, and except
                                             certain repurchase agreements.               further that the Fund may lend its
                                                                                          portfolio securities, provided that the
                                                                                          lending of portfolio securities may be
                                                                                          made only in accordance with appli-
                                                                                          cable law and the guidelines set forth
                                                                                          in the Fund's Prospectus and State-
                                                                                          ment of Additional Information, as
                                                                                          they may be amended from time to
                                                                                          time.
- - ----------------------------------------------------------------------------------------------------------------------------------
REAL ESTATE/COMMODITIES.
FUNDAMENTAL                                  FUNDAMENTAL                                  FUNDAMENTAL
The Fund may not deal in real estate,        The Fund may not deal in real estate,        The Fund may not buy or sell real
oil, gas or other mineral leases,            oil, gas or other mineral leases,            estate (except that the Fund may in-
commodities or commodity contracts,          commodities or commodity contracts,          vest in securities directly or indirectly
except such interests and other              except such interests and other              secured by real estate or interests
property acquired as a result of             property acquired as a result of             therein or issued by companies which
owning other securities, though              owning other securities, though              invest in real estate or interests
securities will not be purchased in          securities will not be purchased in          therein), commodity or commodity
order to acquire any of these                order to acquire any of these                contracts (except to the extent the
interests.                                   interests.                                   Fund may do so in accordance with
                                                                                          applicable law and without registering
                                                                                          as a commodity pool operator under
                                                                                          the Commodity Exchange Act as, for
                                                                                          example, with futures contracts).
 
                                                                                          NON-FUNDAMENTAL
                                                                                          The Fund may not invest in real
                                                                                          estate limited partnership interests or
                                                                                          interests in oil, gas or other mineral
                                                                                          leases, or exploration or other
                                                                                          development programs, except that
                                                                                          the Fund may invest in securities
                                                                                          issued by companies that engage in
                                                                                          oil, gas or other mineral exploration
                                                                                          or development activities.
- - ----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                       2
<PAGE>
 
<TABLE>
<CAPTION>
 
          POLICY/RESTRICTION OF THE               POLICY/RESTRICTION OF THE                PROPOSED POLICY/RESTRICTION OF
               ACQUIRED FUND                           ACQUIRING FUND                            THE ACQUIRING FUND
               -------------                           --------------                            ------------------  
<S>                                             <C>                                           <C>
- - ------------------------------------------------------------------------------------------------------------------------------------

DIVERSIFICATION.
FUNDAMENTAL                                  FUNDAMENTAL                                  FUNDAMENTAL
With respect to 75% of  its gross            With respect to 75% of its total             With respect to 75% of its gross
assets, the Fund may not buy                 assets, the Fund may not buy                 assets, the Fund may not buy
securities of one issuer representing        securities of one issuer representing        securities of one issuer representing
more than (i) 5% of the Fund's gross         (i) more than 5% of its gross assets,        more than (i) 5% of the Fund's gross
assets, except for U.S. Government           except for U.S. Government                   assets, except securities issued or
securities, or (ii) 10% of the voting        Securities, or (ii) 10% of the voting        guaranteed by the U.S. Government,
securities of such issuer.                   securities of such issuer.                   its agencies or instrumentalities, or
                                                                                          (ii) 10% of the voting securities of
                                                                                          such issuer.
- - ----------------------------------------------------------------------------------------------------------------------------------
INVESTMENT IN A SINGLE
INDUSTRY.
FUNDAMENTAL                                  FUNDAMENTAL                                  FUNDAMENTAL
The Fund may not concentrate its             The Fund may not concentrate its             The Fund may not invest more than
investments in any single industry,          investments in any single industry,          25% of its assets, taken at market
excluding U.S. Government                    excluding U.S. Government                    value, in the securities of issuers in
Securities.                                  Securities.                                  any particular industry (excluding
                                                                                          securities of the U.S. Government, its
                                                                                          agencies and instrumentalities).
- - ----------------------------------------------------------------------------------------------------------------------------------
RESTRICTED/ILLIQUID
SECURITIES.
NON-FUNDAMENTAL                              NON-FUNDAMENTAL                              NON-FUNDAMENTAL
The Fund may not invest knowingly            The Fund may not invest knowingly            The Fund may not invest, knowingly,
more than 15% of its net assets in           more than 15% of its net assets in           more than 15% of its net assets (at
illiquid securities, except, subject to      illiquid securities, except, subject to      the time of investment) in illiquid
applicable state law, securities             applicable state law, securities             securities, except for securities
qualifying for resale under Rule 144A        qualifying for resale under Rule 144A        qualifying for resale under Rule 144A
of the Securities Act of 1933, deemed        of the Securities Act of 1933, deemed        of the Securities Act of 1933, deemed
to be liquid by the Board of Trustees.       to be liquid by the Board of Trustees.       to be liquid by the Board of Trustees.
- - ----------------------------------------------------------------------------------------------------------------------------------
MORTGAGING AND PLEDGING
OF ASSETS.
NON-FUNDAMENTAL                              NON-FUNDAMENTAL                              FUNDAMENTAL
The Fund may not, with certain               The Fund may not, with certain               The Fund may not pledge its assets
exceptions, pledge, mortgage or              exceptions, pledge, mortgage or              (other than to secure borrowings, or
hypothecate its assets.                      hypothecate its assets.                      to the extent permitted by the Fund's
                                                                                          investment policies, in connection
                                                                                          with hedging transactions, short sales,
                                                                                          when-issued and forward commitment
                                                                                          transactions and similar investment
                                                                                          strategies).
- - ----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                       3
<PAGE>
 
<TABLE>
<CAPTION>
 
          POLICY/RESTRICTION OF THE               POLICY/RESTRICTION OF THE                PROPOSED POLICY/RESTRICTION OF
               ACQUIRED FUND                           ACQUIRING FUND                            THE ACQUIRING FUND
               -------------                           --------------                            ------------------  
<S>                                             <C>                                           <C>
- - ------------------------------------------------------------------------------------------------------------------------------------

INVESTMENTS IN SECURITIES                  
OF OTHER INVESTMENT
COMPANIES.
NON-FUNDAMENTAL                              NON-FUNDAMENTAL                              NON-FUNDAMENTAL
The Fund may not invest, with certain        The Fund may not invest, with certain        The Fund may not invest in the
exceptions, in the securities of other       exceptions,  in the securities of other      securities of other investment
investment companies.                        investment companies.                        companies, except as permitted by
                                                                                          applicable law.
- - ----------------------------------------------------------------------------------------------------------------------------------
OPTIONS.
 
None stated.                                 None stated.                                 None stated.
- - ----------------------------------------------------------------------------------------------------------------------------------
INVESTMENTS IN SECURITIES
OF ISSUERS IN OPERATION
FOR LESS THAN THREE YEARS.
NON-FUNDAMENTAL                              NON-FUNDAMENTAL                              NON-FUNDAMENTAL
The Fund may not invest in securities        The Fund may not invest in securities        The Fund may not invest in securities
of issuers which, with their                 of issuers which, with their                 of issuers which, with their
predecessors, have a record of less          predecessors, have a record of less          predecessors, have a record of less
than three years continuous                  than three years continuous                  than three years continuous
operations, except through                   operations, except through                   operations, except if more than 5% of
subscription or other rights limited to      subscription or other rights limited to      the Fund's total assets would be
5% of net assets.                            5% of net assets.                            invested in such securities (this
                                                                                          restriction shall not apply to
                                                                                          mortgage-backed securities, asset-
                                                                                          backed securities or obligations issued
                                                                                          or guaranteed by the U.S.
                                                                                          Government, its agencies or
                                                                                          instrumentalities).
- - ----------------------------------------------------------------------------------------------------------------------------------
OWNERSHIP OF PORTFOLIO
SECURITIES BY OFFICERS AND
TRUSTEES
NON-FUNDAMENTAL                              NON-FUNDAMENTAL                              NON-FUNDAMENTAL
The Fund may not hold securities of          The Fund may not hold securities of          The Fund may not hold securities of
any issuer if more than  1/2 of 1% of        any issuer if more than  1/2 of 1% of        any issuer if more than  1/2 of 1% of
the securities of such issuer are            the securities of such issuer are            the securities of such issuer are
owned beneficially by one or more            owned beneficially by one or more            owned beneficially by one or more
officer or Trustee or by one or more         officer or Trustee or by one or more         officers or Trustees or by one or
partners of the underwriter or               partners of the underwriter or               more members or partners of the
investment adviser if together they          investment adviser if together they          underwriter or investment advisor if
own more than 5% of the securities of        own more than 5% of the securities of        together they own more than 5% of
such issuer.                                 such issuer.                                 the securities of such issuer.
- - ----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                       4
<PAGE>
 
<TABLE>
<CAPTION>
 
          POLICY/RESTRICTION OF THE               POLICY/RESTRICTION OF THE                PROPOSED POLICY/RESTRICTION OF
               ACQUIRED FUND                           ACQUIRING FUND                            THE ACQUIRING FUND
               -------------                           --------------                            ------------------  
<S>                                             <C>                                           <C>
- - ----------------------------------------------------------------------------------------------------------------------------------- 

TRANSACTIONS WITH
CERTAIN PERSONS.
 
None stated (but certain restrictions        None stated (but certain restrictions        None stated (but certain restrictions
may exist under applicable law).             may exist under applicable law).             may exist under applicable law).
- - ----------------------------------------------------------------------------------------------------------------------------------
SENIOR SECURITIES
FUNDAMENTAL.                                 FUNDAMENTAL.                                 FUNDAMENTAL
The Fund may not issue senior                The Fund may not issue senior                The Fund may not issue senior
securities.                                  securities, except to the extent             securities to the extent such issuance
                                             permitted by the 1940 Act.                   would violate applicable law.  
- - ----------------------------------------------------------------------------------------------------------------------------------
PURCHASE OF WARRANTS
NON-FUNDAMENTAL.                             NON-FUNDAMENTAL.                             NON-FUNDAMENTAL
The Fund may not invest in warrants,         The Fund may not invest in warrants          The Fund may not invest in warrants
valued at the lower of cost or market,       valued at the lower of cost or market,       if, at the time of the acquisition, its
that exceed 5% of the Fund's total           that exceed 5% of the Fund's total           investment in warrants, valued at the
assets (included within such                 assets (included within such                 lower of cost or market, would
limitation, but not to exceed 2% of          limitation, but not to exceed 2% of          exceed 5% of the Fund's total assets
the Fund's total assets, are warrants        the Fund's total assets, are warrants        (included within such limitation, but
which are not listed on the New York         which are not listed on the New York         not to exceed 2% of the Fund's total
or American Stock Exchange or a              or American Stock Exchange or a              assets, are warrants which are not
major foreign exchange).                     major foreign exchange).                     listed on the New York or American
                                                                                          Stock Exchange or a major foreign
                                                                                          exchange).
- - ----------------------------------------------------------------------------------------------------------------------------------
SHORT-TERM TRADING
NON-FUNDAMENTAL.                             NON-FUNDAMENTAL.                             NON-FUNDAMENTAL.
The Fund may not engage in short-            The Fund may not engage in short-            The Fund may not engage in short-
term trading under normal                    term trading under normal                    term trading under normal
circumstances.                               circumstances.                               circumstances.
- - ----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                       5
<PAGE>
 
STATEMENT OF ADDITIONAL INFORMATION DATED MARCH __, 1996

                          ACQUISITION OF THE ASSETS OF
                    Lord Abbett Balanced Trust, A SERIES OF
                          Lord Abbett Securities Trust
                 The General Motors Building, 767 Fifth Avenue
                               New York, NY 10153
                                 (800) 426-1130

                    BY AND IN EXCHANGE FOR CLASS C SHARES OF
                          Balanced Series, A SERIES OF
                          Lord Abbett Investment Trust
                 The General Motors Building, 767 Fifth Avenue
                               New York, NY 10153
                                 (800) 426-1130

      This Statement of Additional Information, relating specifically to the
proposed transfer of the assets of Lord Abbett Balanced Trust (the "Acquired
Fund"), a series of  Lord Abbett Securities Trust (the "Trust"), to the Balanced
Series (the "Acquiring Fund"), a series of Lord Abbett Investment Trust (the
"Income Trust") in exchange for Class C shares of the Acquiring Fund and the
assumption by the Acquiring Fund of the liabilities of the Acquired Fund,
consists of (i) this cover page, (ii) the pro-forma financial statements of the
             -                                                                 
Acquiring Fund as at October 31, 1995 and for the 12-month period then ended
prepared as though the reorganization referred to above had occurred on November
1, 1994, attached hereto as Exhibit A, and (iii) the following described
documents, each of which accompanies this Statement of Additional Information
and is incorporated herein by reference:

      1.  Statement of Additional Information of the Investment Trust dated
March 1, 1996./*/

      2.  Statement of Additional Information of the Securities Trust dated
March 1, 1996, insofar as it relates to the Acquired Fund./*/

      3.  The financial statements of the Acquiring Fund for the fiscal year
ended October 31, 1995, and the report thereon of Deloitte & Touche LLP,
independent auditors, contained in the 1995 Annual Report of the Acquiring Fund.

      4.  The financial statements of the Acquired Fund for the fiscal year
ended October 31, 1995, and the report thereon of Deloitte & Touche LLP,
independent public accountants, contained in the 1995 Annual Report of the
Acquired Fund.


- - ----------------------------
/*/ A pre-effective amendment is to be filed to incorporate by reference these
documents.

                                      B-1
<PAGE>
 
      The financial statements referred to above are incorporated herein in
reliance upon the authority of Deloitte & Touche LLP as experts in auditing and
accounting.  This Statement of Additional Information is not a prospectus.  A
Proxy Statement and Prospectus dated the date hereof relating to the above-
referenced matter may be obtained without charge by calling or writing the
Acquiring Fund at the telephone number or address set forth above.  This
Statement of Additional Information should be read in conjunction with such
Proxy Statement and Prospectus.

                                      B-2
<PAGE>
                                                                 EXHIBIT A
PRO-FORMA PORTFOLIO OF INVESTMENTS FUND  
October 31, 1995 (Unaudited)
<TABLE>
<CAPTION>
                                                            LORD ABBETT             LORD ABBETT
                                                          INVESTMENT TRUST        SECURITIES TRUST
                                                          BALANCED SERIES          BALANCED TRUST   PRO-FORMA COMBINED
                                                            Number    Market     Number    Market     Number    Market
                   Security                               of Shares   Value     of Shares   Value    of Shares   Value
- - -----------------------------------------------           ---------  -------    ---------  ------   ----------  ------
<S>                                                       <C>        <C>        <C>        <C>      <C>         <C>     
INVESTMENTS IN SECURITIES 94.75%
COMMON STOCKS AND CONVERTIBLE SECURITIES 52.54%

Aerospace
1.11%              Boeing Co.                                 850  $ 55,780        450     $ 29,531     1,300   $ 85,311
                                                                                                                
Apparel                                                                                                         
..42%               VF Corp.                                   450    21,543        250       11,969       700     33,512
                                                                                                                
Auto Parts         Genuine Parts Company                    2,300    91,137        550       21,794     2,850    112,931
1.86%              TRW Inc.                                   300    19,725        150        9,863       450     29,588
                   Total                                            110,862                  31,657              142,519
                                                                                                                
Automobiles                                                                                                     
1.22%              General Motors Corp.                     1,550    67,812        600       26,250     2,150     94,062
                                                                                                                
Banks:                                                                                                          
Money Center                                                                                                    
1.19%              Chemical Banking Corp.                   1,200    68,250        400       22,750     1,600     91,000
                                                                                                                
Banks: Regional    BankAmerica Corp.                          950    54,625        400       23,000     1,350     77,625
1.54%              Comerica Inc.                            1,000    33,625        200        6,725     1,200     40,350
                   Total                                             88,250                  29,725              117,975
                                                                                                                
Chemicals          Dow Chemical Co.                         1,150    78,918        500       34,313     1,650    113,231
2.40%              Union Carbide Corp.                      1,300    49,237        550       20,831     1,850     70,068
                   Total                                            128,155                  55,144              183,299
                                                                                                                
Data Processing                                                                                                 
Equipment                                                                                                       
..85%               Hewlett-Packard Co.                        500    46,312        200       18,525       700     64,837
                                                                                                                
Data Processing                                                                                                 
Services           General Motors Corp. Class E                                                                 
1.73%              (Electronic Data Systems)                2,200   103,675        600       28,275     2,800    131,950
                                                                                                                
Drugs/Health       Merck & Co., Inc.                          650    37,375        450       25,875     1,100     63,250
Care Products      SmithKline Beecham plc ADR                 600    31,125        500       25,938     1,100     57,063
1.55%              Total                                             68,500                  51,813              120,313
                                                                                                                
Electric Power     Baltimore Gas & Electric Co.             1,750    46,812        650       17,388     2,400     64,200
3.00%              CINergy Corp.                            2,650    75,194        900       25,538     3,550    100,731
                   Public Service Enterprises Group Inc.    1,550    45,531        500       14,688     2,050     60,219
                   Total                                            167,536                  57,614              225,150
                                                                                                                
Electrical                                                                                                      
Equipment                                                                                                       
1.50%              Emerson Electric Co.                     1,250    89,062        350       24,938     1,600    114,000
                                                                                                                
Electronics:                                                                                                    
Components                                                                                                      
1.72%              AMP Inc.                                 2,400    94,200        950       37,288     3,350    131,488
                                                                                                                
Financial:         American Express Co.                     1,050    42,656        450       18,281     1,500     60,938
Miscellaneous      Transamerica Corp.                         650    44,038        200       13,550       850     57,588
1.55%              Total                                             86,694                  31,831              118,525
                                                                                                                
Food               Conagra Inc.                               950    36,694        500       19,313     1,450     56,007
4.74%              Dean Foods Co.                             900    25,088        250        6,969     1,150     32,057
                   Hershey Foods Corp.                      1,250    74,688        350       20,913     1,600     95,601
                   RJR Nabisco                              2,500    76,875        800       24,600     3,300    101,475
                   Supervalu Inc.                           2,150    66,113        400       12,300     2,550     78,413
                   Total                                            279,458                  84,095              363,553
</TABLE>

                                                                               1
<PAGE>
 
<TABLE>
<CAPTION>
PRO-FORMA PORTFOLIO OF INVESTMENTS FUND
October 31, 1995 (Unaudited)
                                                                      LORD ABBETT          LORD ABBETT
                                                                   INVESTMENT TRUST      SECURITIES TRUST
                                                                    BALANCED SERIES       BALANCED TRUST   PRO-FORMA COMBINED
                                                                 NUMBER       MARKET     NUMBER   MARKET     NUMBER    MARKET
                             Security                            of Shares    Value    of Shares   Value    of Shares   Value
                             -------------------------           ---------    ------   ---------  ------    ---------  ------
<S>                          <C>                                 <C>          <C>                 <C>       <C>       <C>        
Insurance                    Aetna Life & Casualty Co.           1,000        $ 70,375     300     $ 21,112    1,300  $ 91,487
4.00%                        Chubb Corp.                           500          44,938     150       13,480      650    58,418
                             CIGNA Corp.                           700          69,388     350       34,694    1,050   104,081
                             SAFECO Corp.                          600          38,513     150        9,628      750    48,141
                             Total                                             223,214               78,914            302,128
Machinery:                                                                                                     
Diversified                                                                                                    
1.22%                        Deere & Co.                           700          62,562     350       31,280    1,050    93,842
                                                                                                               
Miscellaneous                                                                                                  
..71%                         Minnesota Mining & Mfg. Co.           750          42,656     200       11,374      950    54,030
                                                                                                       
Natural Gas                                                                                                    
Transmission                                                                                                   
1.02%                        Coastal Corp.                       2,000          64,750     400       12,950    2,400    77,700
Office Equipment/                                                                 
Supplies                                                                                                       
..52%                         Apple Computer Inc.                   850          30,866     250        9,077    1,100    39,943
                                                                                                               
Oil: Domestic                                                                                                  
..73%                         Ultramar Corp.                      1,900          46,313     400        9,750    2,300    56,063
                                                                                                               
Oil: International           Chevron Corp.                       1,150          53,763     450       21,038    1,600    74,800
3.03%                        Exxon Corp.                           900          68,738     500       38,188    1,400   106,925
                             Mobil Corp.                           400          40,300     100       10,075      500    50,375
                             Total                                             162,801               69,301            232,102
                                                                                                               
Paper and                    Federal Paper Board Inc.            1,600          67,200     550       23,100    2,150    90,300
Forest Products              James River Corp.                     900          28,913     100        3,213    1,000    32,126
3.31%                        Scott Paper Co.                     1,150          61,238     300       15,975    1,450    77,213
                             Westvaco Corporation                1,700          47,175     225        6,244    1,925    53,419
                             Total                                             204,526               48,532            253,058
                                                                                                               
Printing and                                                                                                   
Publishing                                                                                                     
1.23%                        Donnelley, R.R. & Sons Co.          1,950          71,175     650       23,725    2,600    94,900
                                                                                                           
Retail                       Dayton Hudson Corp.                   500          34,375     200       13,750      700    48,125
1.54%                        Sears, Roebuck & Co.                1,500          51,000     550       18,700    2,050    69,700
                             Total                                              85,375               32,450            117,825
                                                                                                               
Savings and Loan             Ahmanson, H.F. & Co.                2,600          65,000     750       18,750    3,350    83,750
2.16%                        Great Western                       2,650          59,956     950       21,493    3,600    81,449
                             Financial Corp.                                                                   
                             Total                                             124,956               40,243            165,199
                                                                                                               
Telecommunications           AT&T Corp.                          1,250          80,000     350       22,400    1,600   102,400
3.13%                        MCI Communications Corp.            4,100         102,244   1,400       34,912    5,500   137,156
                             Total                                             182,244               57,312            239,556
                                                                                                               
Tire and Rubber                                                                                                
Goods                                                                                                          
..84%                         Cooper Tire & Rubber Company        2,100          48,563     700       16,187    2,800    64,750
                                                                                                               
Tobacco                                                                                                        
1%                           American Brands Inc.                1,250          53,594     500       21,437    1,750    75,031
                                                                                                               
Waste Management             Browning Ferris Industries Inc.     1,650          48,056     650       18,930    2,300    66,986
1.72%                        WMX Technologies Inc.               1,950          54,844     350        9,844    2,300    64,688
                             Total                                             102,900               28,774            131,674
</TABLE>

2
<PAGE>
 
PRO-FORMA PORTFOLIO OF INVESTMENTS FUND
October 31, 1995 (Unaudited)
<TABLE>
<CAPTION>
                                                       LORD ABBETT              LORD ABBETT
                                                      INVESTMENT TRUST       SECURITIES TRUST
                                                      BALANCED SERIES         BALANCED TRUST          PRO-FORMA COMBINED
                                                     Number     Market          Number    Market      Number       Market
     Security                                        of Shares   Value         of Shares   Value     of Shares      Value
     -------------------------------------           ---------  ------       -----------  -------    ---------     ------
<S>                                                  <C>        <C>           <C>        <C>          <C>         <C>
U.S. GOVERNMENT OBLIGATIONS 42.21%

     Federal National Mortgage Association
     8 1/2% due 4/1/2025                              $773M     $  801,750    $304M      $  314,759    $1,077M     $1,116,509

     Federal National Mortgage Association
     7% due 10/1/2025                                  196M        194,285      98M          97,143       294M        291,428

     U.S. Treasury Bonds 7 1/2% due
     11/15/2001                                        800M        865,375     210M         227,161     1,010M      1,092,536

     U.S. Treasury Notes 6 1/2% due 8/15/2005          500M        517,890     200M         207,156       700M        725,046

     Total                                                       2,379,300                  846,219                 3,225,519

     Total Investments in Securities
     (Cost $5,077,489 and $1,740,756, respectively)              5,361,884                1,878,930                 7,240,814
</TABLE> 
     See Notes to Pro-Forma Financial Statements.

                                                                               3

<PAGE>

                      PRO-FORMA STATEMENT OF NET ASSETS
                               OCTOBER 31, 1995
                                 (UNAUDITED) 


<TABLE>
<CAPTION>
 
 
                                                Lord Abbett      Lord Abbett
                                              Investment Trust  Securities Trust    Pro-Forma    Pro-Forma
                                               Balanced Series   Balanced Trust    Adjustments   Combined
                                               ------------------------------------------------------------
 <S>                                           <C>               <C>               <C>          <C>         
Assets
Investments, at value (cost $5,077,489               5,361,884    1,878,930                       7,240,814
and $1,740,756 respectively)
Cash                                                   226,925       27,906                         254,831
Receivable for investments sold                          3,718            -                           3,718
Receivable for capital stock sold                      111,461        3,722                         115,183
Other assets & other receivables                        80,598       59,112          (30,694)(*)    109,016
                                               ------------------------------------------------------------
 Total Assets                                        5,784,586    1,969,670          (30,694)     7,723,562
                                               ------------------------------------------------------------
Liabilities                                                                                       
Payable for securities purchased                        68,325        4,349                          72,674
Accounts payable, accrued expenses & taxes               3,582        5,538                           9,120
                                                                                                  
 Total Liabilities                                      71,907        9,887                          81,794
                                               ------------------------------------------------------------
Net Assets as of October 31, 1995                    5,712,679    1,959,783          (30,694)     7,641,768
                                               ============================================================
                                                                                                  
Net Assets were comprised of :                                                                    
 Paid-in capital                                     5,366,735    1,769,869                       7,136,604
 Accumulated net realized gain                          58,841       35,213                          94,054
 Net unrealized appreciation                           284,395      138,174                         422,569
 Undistributed net investment income                     2,708       16,527          (30,694)(*)    (11,459)
                                               ------------------------------------------------------------
Net Assets as of October 31, 1995                    5,712,679    1,959,783          (30,694)     7,641,768
                                               ============================================================
                                                                                                  
Class A shares outstanding as of October 31, 1995      533,307                                      533,307
Class C shares outstanding as of October 31, 1995                   172,752                         180,120
                                                                                          
Class A:                                                                                  
 Net Asset Value and redemption price                                                     
 per share                                          $    10.71                                   $    10.71               
                                                                                          
Class C:                                                                                  
 Net Asset Value and redemption price                            $    11.34                      $    10.71               
 per share
</TABLE>


- - -------------------
(*)  Adjustment to reflect the write-off of unamortized deferred organization
     costs of Lord Abbett Securities Trust Balanced Trust.
<PAGE>
 
                       PRO-FORMA STATEMENT OF OPERATIONS
                          YEAR ENDED OCTOBER 31, 1995
                                  (UNAUDITED)

<TABLE>
<CAPTION>
 
 
                                                                Lord Abbett       Lord Abbett
                                                              Investment Trust   Securities Trust     Pro-Forma     Pro-Forma
                                                               Balanced Series    Balanced Trust     Adjustments    Combined
                                                              --------------------------------------------------------------
<S>                                                           <C>                <C>                 <C>          <C>         
Investment Income
 Interest                                                           $   98,067    $   44,058                         142,125
                                                                                                        
 Dividends                                                              38,946        17,502                          56,448
                                                                                                        
                                                                                                        
                                                                                                        
                                                              --------------------------------------------------------------
 Total Income                                                       $  137,013    $   61,560                         198,573
                                                              --------------------------------------------------------------
Expenses:                                                                                               
         Management fee                                                 23,330         9,859                          33,189
                                                              --------------------------------------------------------------
         12b-1 Distribution Plan                                           -           3,463                           3,463
                                                              --------------------------------------------------------------
         Shareholder servicing costs                                       800         2,819                           3,619
                                                              --------------------------------------------------------------
         Reports to shareholders                                         4,000           500                           4,500
                                                              --------------------------------------------------------------
         Legal and audit                                                 1,500           500                           2,000
                                                              --------------------------------------------------------------
         Registration fee                                                1,658         2,800                           4,458
                                                              --------------------------------------------------------------
         Organization expense                                            6,370         6,130            30,694 (a)    43,194
                                                              --------------------------------------------------------------
         Management Fees Waived                                        (27,906)      (25,108)                        (53,014)
                                                              --------------------------------------------------------------
        Other                                                            1,800         2,500                           4,300
                                                              --------------------------------------------------------------
Total Expenses                                                          11,552         3,463            30,694        45,709
                                                              --------------------------------------------------------------
Net Investment Income                                                  125,461        58,097           (30,694)      152,864
                                                                                                        
Net Realized and Unrealized gain (loss) on Investments:                                                 
                                                                                                        
 Net Realized gain (loss) from security transactions                                                    
                                                                                                        
 Proceeds from sales                                                 4,497,911     2,970,739                       7,468,650
                                                                                                        
 Cost of securities sold                                             4,439,070     2,935,526                       7,374,596
                                                              --------------------------------------------------------------
Net realized gain (loss)                                                58,841        35,213                          94,054
                                                              --------------------------------------------------------------
                                                                                                        
Net unrealized appreciation (depreciation) of investments:                                              
 Beginning of year                                                           0             0                             -
                                                                                                        
 End of year                                                           284,395       138,174                         422,569
                                                              --------------------------------------------------------------
Net unrealized appreciation                                            284,395       138,174                         422,569
                                                              --------------------------------------------------------------
                                                                                                        
 Net realized/unrealized gain on investment                            343,236       173,387               -         516,623
                                                              --------------------------------------------------------------
                                                                                                        
Net increase in net assets resulting from operations                $  468,697    $  231,484           ($30,694)     669,487
                                                              ==============================================================
 
</TABLE>


(a)  Adjustment to reflect the write-off of unamortized deferred organization
     costs of Lord Abbett Securities Trust Balanced Trust.
<PAGE>
 
Notes to Pro-Forma Financial Statements

1. Significant Accounting Policies   

The Lord Abbett Investment Trust was organized as a Delaware business trust on
August 16, 1993 and is registered under the Investment Company Act of 1940 as a
diversified, open-end management investment company. On December 22, 1994, Lord
Abbett Investment Trust -Balanced Series (the "Company") received an initial
capital contribution of $1,000 and issued 105 shares of the Balanced Series to
the partners of Lord, Abbett & Co. The following is a summary of significant
accounting policies consistently followed by the Company. The policies are in
conformity with generally accepted accounting principles. (a) Market value is
determined as follows: Securities listed or admitted to trading privileges on
any securities exchange are valued at the last sales price on the exchange on
which such securities are traded, as of the close of business on the day the
securities are being valued or, lacking any sales, at the latest price on the
basis of current quotations from dealers (as in the case of bonds), from
valuations furnished by an independent pricing service or, in their absence,
fair value as determined under procedures approved by the Board of Trustees. (b)
It is the policy of the Company to meet the requirements of the Internal Revenue
Code applicable to regulated investment companies and to distribute all of its
taxable income in taxable distributions. Therefore, no federal income tax
provision is required. (c) Security transactions are accounted for on the date
that the securities are purchased or sold (trade date). Dividend income and
distributions to shareholders are recorded on the ex-dividend date and interest
is recorded on the accrual basis. The Company has elected not to amortize
premiums on U.S. Government bonds which is consistent with the treatment for
federal income tax purposes. (d) A portion of the proceeds from sales and costs
of repurchases of shares, equivalent to the amount of distributable net
investment income on the date of the transaction, is credited or charged to
undistributed income. Undistributed net investment income per share thus is
unaffected by sales or repurchases of shares. (e) The organization expenses of
the Company are amortized evenly over a period of five years from its respective
commencements of operations.

2. Distributions
Dividends from net investment income are declared quarterly and paid monthly.
Taxable net realized gain from security transactions, if any, will be
distributed to shareholders in December 1995.

3. Repurchase Agreements
The Company may enter into repurchase agreements with certain banks and
broker/dealers whereby the company, through its custodian, receives delivery of
the underlying securities, the amount of which at the time of purchase and each
subsequent business day is required to be maintained at such a level at the
market value, depending on the maturity of the repurchase agreement and the
underlying collateral, is equal to at least 100% of the resale price.

4. Agreements
The Company has a management agreement with Lord, Abbett & Co. for which it
provided the Company with investment management services and executive and other
personnel, paid the remuneration of officers, provided office space and paid for
ordinary and necessary office and clerical expenses relating to research,
statistical work and the supervision of the investment portfolios.

The management fee is based on average daily net assets for each month at the
annual rate of .75 of 1% of average daily net assets for each month.

For the Class A shares, the Company adopted a Rule 12b-1 Plan providing for the
quarterly payment of compensation to dealers of (1) an annual service fee of
..25% of the average daily net asset value of shares sold by dealers from the
commencement of the Series' public offering and (2) with respect to sales at the
breakpoint of $1 million or more, a one-time distribution fee, at the time of
sale, of 1% of the first $3 million, plus .50% of the next $7 million, plus .25%
of the remainder of the net asset value of shares sold on or after the effective
date. This Plan commences on the first day of the calendar quarter subsequent to
net assets reaching $50 million.

Pursuant to the Rule 12b-1 Plan for Class C shares, the Company will pay (1) a
service fee and a distribution fee, at the time shares are sold, not to exceed
..25% and .75%, respectively, of the net asset value of such shares and (2) at
each quarter-end after the first anniversary of the sale of such shares, fees
for services and distribution at annual rates not to exceed .25% and .75%,
respectively, of the average annual net asset value of shares outstanding
(payments with respect to shares not outstanding during the full quarter to be
prorated). The fees will be paid to Lord Abbett Distributor LLC which Lord,
Abbett & Co. may retain from the quarterly distribution fee, for payment of
distribution expenses incurred directly by it, an amount not to exceed .10% of
the average annual net asset value of such shares outstanding.

4
<PAGE>
 
                                    PART C

ITEM 15.  INDEMNIFICATION

   The Registrant is a Delaware Business Trust established under Chapter 38 of
Title 12 of the Delaware Code.  The Registrant's Declaration and Agreement of
Trust at Section 4.3 relating to indemnification of trustees, officers and
employees states the following.

   The Trust shall indemnify each of its Trustees, officers, employees and
agents (including any individual who serves at its request as director, officer,
partner, trustee or the like of another organization in which it has any
interest as a shareholder, creditor or otherwise) against all liabilities and
expenses, including but not limited to amounts paid in satisfaction of
judgments, in compromise or as fines and penalties, and counsel fees reasonably
incurred by him or her in connection with the defense or disposition of any
action, suit or other proceeding, whether civil or criminal, before any court or
administrative or legislative body in which he or she may be or may have been
involved as a party or otherwise or with which he or she may be or may have been
threatened, while acting as Trustee or as an officer, employee or agent of the
Trust or the Trustees, as the case may be, or thereafter, by reason of his or
her being or having been such a Trustee, officer, employee or agent, except with
                                                                     ------     
respect to any matter as to which he or she shall have been adjudicated not to
have acted in good faith in the reasonable belief that his or her action was in
the best interests of the Trust or any Series thereof.  Notwithstanding anything
herein to the contrary, if any matter which is the subject of indemnification
hereunder relates only to one Series (or to more than one but not all of the
Series of the Trust), then the indemnity shall be paid only out of the assets of
the affected Series.  No individual shall be indemnified hereunder against any
liability to the Trust or any Series thereof or the Shareholders by reason of
willful misfeasance, bad faith, gross negligence or reckless disregard of the
duties involved in the conduct of his or her office. In addition, no such
indemnity shall be provided with respect to any matter disposed of by settlement
or a compromise payment by such Trustee, officer, employee or agent, pursuant to
a consent decree or otherwise, either for said payment or for any other expenses
unless there has been a determination that such compromise is in the best
interests of the Trust or, if appropriate, of any affected Series thereof and
that such Person appears to have acted in good faith in the reasonable belief
that his or her action was in the best interests of the Trust or, if
appropriate, of any affected Series thereof, and did not engage in willful
misfeasance, bad faith, gross negligence or reckless disregard of the duties
involved in the conduct of his or her office.  All determinations that the
applicable standards of conduct have been met for in demnification hereunder
shall be made by (a) a majority vote of a quorum consisting of disinterested
Trustees who are not parties to the proceeding relating to indemnification, or
(b) if such quorum is not obtainable or, even if obtainable, if a majority vote
of such quorum so directs, by independent legal counsel in a written opinion, or
(c) a vote of Shareholders (excluding Shares owned of a record or beneficially
by such individual).  In addition, unless a matter is disposed of with a court
determination (i) on the merits that such Trustee, officer, employee or agent
was not liable or (ii) that such Person was not guilty of willful misfeasance,
bad faith, gross negligence or reckless disregard of the duties involved in the
conduct of his or her office, no indemnification shall be provided hereunder
unless there has been a determination by independent legal counsel in a written
opinion that such Person did not engage in willful misfeasance, bad faith, gross
negligence or reckless disregard of the duties involved in the conduct of his or
her office.

                                      C-1
<PAGE>
 
   The Trustees may make advance payments out of the assets of the Trust, or, if
appropriate, of the affected Series in connection with the expense of defending
any action with respect to which indemnification might be sought under this
Section 4.3.  The indemnified Trustee, officer, employee or agent shall give a
written undertaking to reimburse the Trust or the Series in the event it
subsequently determined that he or she is not entitled to such indemnification
and (a) the indemnified Trustee, officer, employee or agent shall provide
security for his or her undertaking, (b) the Trust shall be insured against
losses arising by reason of lawful advances, or (c) a majority of a quorum of
disinterested Trustees or an independent legal counsel in a written opinion
shall determine, based on a review of readily available facts (as opposed to a
full trial-type inquiry), that there is reason to believe that the indemnitee
ultimately will be found entitled to indemnification.  The rights accruing to
any Trustee, officer, employee or agent under these provisions shall not exclude
any other right to which he or she may be lawfully entitled and shall inure to
the benefit of his or her heirs, executors, administrators or other legal
representatives.

   Insofar as indemnification for liability arising under the Securities Act of
1933 may be permitted to Trustees, officers and controlling persons of the
Registrant pursuant to the foregoing provisions, or otherwise, the Registrant
has been advised that in the opinion of the Securities and Exchange Commission
such indemnification is against public policy as expressed in the Act and is,
therefore, unenforceable. In the event that a claim for indemnification against
such liabilities (other than the payment by the Registrant of expense incurred
or paid by a Trustee, officer or controlling person of the Registrant in the
successful defense of any action, suit or proceeding) is asserted by such
Trustee, officer or controlling person in connection with the securities being
registered, the Registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the Act and will be governed by the final adjudication of
such issue.

 
ITEM 16.  EXHIBITS
<TABLE>
<CAPTION>
<S>        <C> 
   1. (a)  Declaration and Agreement of Trust of the Registrant. (1)
      (b)  Form of Amendment designating the Lord Abbett U.S. Government
           Securities Series of the Registrant and Class A and Class C shares
           thereof; filed herewith.

   2.      By-Laws of the Registrant. (1)

   3.      Not Applicable. 

   4.      Form of Agreement and Plan of Reorganization between Registrant and
           Lord Abbett Securities Trust-Lord Abbett Balanced Trust; filed
           herewith as Exhibit A contained in Part A of this Registration
           Statement.

   5.      Not Applicable.

   6.      Investment Management Agreement between the Registrant and Lord,
           Abbett & Co. dated October 20, 1993. (2)
</TABLE>

                                     C-2
<PAGE>
 
<TABLE>
<CAPTION>
<S>        <C>
   7. (a)  Form of Rule 12b-1 Plan for Registrant Class C Shares; filed
           herewith.
      (b)  Distribution Agreement, dated May 19, 1993, between Registrant and 
           Lord, Abbett & Co. (1)
 
   8. (a)  Deferred Compensation Plan. (3)
      (b)  Retirement Plan. (3)
 
   9. (a)  Custody Agreement. (4)
      (b)  Form of Assignment and Assumption Agreement between Morgan Guaranty
           Trust Company of New York and Bank of New York; filed herewith.

  10. (a)  See Item 7(a) above.
      (b)  Form of Rule 18f-3 Plan; filed herewith.

  11.      Form of opinion and Consent of Debevoise & Plimpton as to the
           legality of securities being issued; filed herewith.
 
  12.      Form of opinion and Consent of Debevoise & Plimpton as to Tax 
           Matters; filed herewith.

  13.      Not Applicable.

  14. (a)  Consent of Deloitte & Touche LLP regarding financial statements of
           Registrant, Lord Abbett U.S. Government Securities Fund, Inc. and
           Lord Abbett Securities Trust; filed herewith.
      (b)  Ruling application submitted to the Internal Revenue Service, dated
           October 19, 1995, supplemental application dated January 26, 1996 and
           Ruling, dated February 5, 1996; filed herewith.

  15.      Not Applicable.

  16.      Not Applicable.

  17. (a)  Form of Proxy Card; filed herewith.
      (b)  Prospectus and Statement of Additional Information of the Registrant,
           dated March ___, 1996. (5)
      (c)  Financial statements of the Acquiring Fund for the fiscal year ended
           October 31, 1995 and report thereon of Deloitte & Touche LLP. (6)
      (d)  Prospectus and Statement of Additional Information of Lord Abbett
           Securities Trust, dated December 27, 1994. (7)
      (e)  Financial statements of the Acquired Fund for the fiscal year ended
           October 31, 1995, and the report thereon of Deloitte and Touche 
           LLP. (8)
      (f) Notice to Brokers

      (g) Letter to Shareholders re: Proxy


</TABLE>
- - -------------------------
(1)  Incorporated herein by reference to Registrant's Registration Statement on
     Form N-1A (File Nos. 33-68090 and 811-7988) filed on or about February 26,
     1993.

                                      C-3
<PAGE>
 
(2)  Incorporated herein by reference to Post-Effective Amendment No. 2 to
     Registrant's Registration Statement on Form N-1A (File Nos. 33-68090 and
     811-7988) Filed on or about October 7, 1993.
(3)  Incorporated herein by reference to Post-Effective Amendment No. 7 to Lord
     Abbett Securities Trust's Registration Statement on Form N-1A (File Nos.
     33-68090 and 811-7988) filed on or about October 7, 1994.
(4)  Incorporated herein by reference to Pre-Effective Amendment No. 2 to
     Registrant's Registration Statement on Form N-1A (File Nos. 33-68090 and
     811-7988) filed on or about August 6, 1993.
(5)  Incorporated herein by reference to Post-Effective Amendment No. 8 to
     Registrant's Registration Statement on Form N-1A (File Nos. 33-68090 and
     811-7988) filed on or about February __, 1996.
(6)  1995 Annual Report of the Acquiring Fund filed on or about January 10,
     1996.
(7)  Incorporated herein by reference to Post-Effective Amendment No. 7 to Lord
     Abbett Securities Trust's Registration Statement on Form N-1A (File Nos.
     811-7538 and 33-58846) filed on or about December 20, 1994.
(8)  1995 Annual Report of the Acquired Fund filed on or about January 10, 1996.

ITEM 17.  UNDERTAKINGS

(1)  The undersigned registrant agrees that, prior to any public reoffering of
     the securities registered through the use of a prospectus which is a part
     of this registration statement by any person or party who is deemed to be
     an underwriter within the meaning of Rule 145(c) of the Securities Act [17
     CFR (S) 230.145c] the reoffering prospectus will contain the information
     called for by the applicable registration form for reofferings by persons
     who may be deemed underwriters, in addition to the information called for
     by the other items of the applicable form.

(2)  The undersigned registrant agrees that every prospectus that is filed under
     paragraph (1) above will be filed as part of an amendment to the
     registration statement and will not be used until the amendment is
     effective, and that, in determining any liability under the 1933 Act, each
     post-effective amendment shall be deemed to be a new registration statement
     for the securities offered therein, and the offering of the securities at
     that time shall be deemed to be the initial bona fide offering of them.

                                      C-4
<PAGE>
 

                                   SIGNATURES

      As required by the Securities Act of 1933, this Registration Statement has
been signed on behalf of the Registrant in the City of New York and State of New
York on the 29th  day of February 1996.

                                  LORD ABBETT INVESTMENT TRUST


                                By:  /s/ Ronald P. Lynch
                                    ---------------------------------------
                                     Ronald P. Lynch, Chairman of the Board

      As required by the Securities Act of 1933, this Registration Statement has
been signed by the following persons in the capacities indicated and on the
dates indicated.

<TABLE>
<CAPTION>
 
Signature                           Title              Date
- - -------------------------  -----------------------     ----
<S>                        <C>                      <C>
 /s/Ronald P. Lynch           Chairman of the Board  2/29/96
- - -------------------------  and Trustee              -----------
Ronald P. Lynch

 /s/ Robert S. Dow            President and Trustee  2/29/96
- - -------------------------                           -----------
Robert S. Dow

/s/ John J. Gargana, Jr.     Vice President and        2/29/96
- - -------------------------  Chief Financial Officer  -----------
John J. Gargana, Jr.

 /s/ E. Thayer Bogelow             Trustee             2/29/96
- - -------------------------                           -----------
E. Thayer Bigelow

                                   Trustee
- - -------------------------                           ----------- 
Stewart S. Dixon 

                                   Trustee
- - -------------------------                           -----------
John C. Jansing

C. Alan MacDonald                  Trustee             2/29/96
- - -------------------------                           -----------
C. Alan MacDonald

                                   Trustee
- - -------------------------                           -----------
Hansel B. Millican, Jr.

/s/ Thomas J. Neff                 Trustee             2/29/96
- - -------------------------                           -----------
Thomas J. Neff
</TABLE>

                                      C-5
<PAGE>
 
                                 EXHIBIT INDEX

      The following exhibits are filed as a part of this Registration Statement
pursuant to General Instruction G of Form N-14.
<TABLE>
<CAPTION>
 
 EXHIBIT                                                                  PAGE
 NUMBER                       DESCRIPTION                                NUMBER
 -------                      -----------                                ------ 
<S>        <C>                                                         

(1)(b)     Form of Amendment designating the Lord Abbett U.S.
           Government Securities Series of the Registrant and Class
           A and Class C shares thereof

(4)        Form of Agreement and Plan of Reorganization between the
           Registrant and Lord Abbett Securities Trust-Lord Abbett 
           Balanced Trust

(7)        Form of Rule 12b-1 Plan for Registrant Class C Shares

(9)(b)     Form of Assignment and Assumption Agreement between Morgan
           Guaranty Trust Company of New York and Bank of New York

(10)(b)    Rule 18f-3 Plan

(11)       Form of opinion and Consent of Debevoise & Plimpton as to 
           legality of securities being issued

(12)       Form of opinion and Consent of Debevoise & Plimpton as to 
           Tax Matters

(14)(a)    Consent of Deloitte & Touche LLP regarding financial 
           statements

    (b)    Ruling application submitted to the Internal Revenue Service,
           dated October 19, 1995, supplemental application dated
           January 26, 1996 and Ruling, dated February 5, 1996

(17)(a)    Form of Proxy Card

      (f) Notice to Brokers

      (g) Letter to Shareholders re: Proxy


                                      C-6
</TABLE>


 
                                                                    Exhibit 1(b)
                                                                    ------------
                                                      Draft -- February 20, 1996





                          LORD ABBETT INVESTMENT TRUST
                          ----------------------------

                                  AMENDMENT TO
                              DECLARATION OF TRUST
                              --------------------


     The undersigned, being at least a majority of the Trustees of Lord Abbett
Investment Trust, a Delaware business trust (the "Trust"), organized pursuant to
a Declaration of Trust dated August 16, 1993 (the "Declaration"), do hereby
establish, pursuant to Section 5.3 of the Declaration:

     (i)   a new Series of shares of beneficial interest, to be designated the
      -    Lord Abbett U.S. Government Securities Series, which shares shall
           represent undivided beneficial interests in the assets of the Trust
           allocated to that Series pursuant to Section 5.4.1 of the
           Declaration. The shares of beneficial interest for the Lord Abbett
           U.S. Government Securities Series shall have the same rights and
           preferences as shares of the other Series as set forth in the
           Declaration.

     (ii)  a new class of shares for each Series of the Trust, to be designated
      --   the Class C shares of such Series. The initial class of shares of
           each Series shall be designated the Class A shares of such Series.
           Any variations between such classes as to purchase price,
           determination of net asset value, the price, terms and manner of
           redemption, special and relative rights as to dividends and on
           liquidation, and conditions under which such classes shall have
           separate voting rights, shall be as set forth in the Declaration or
           as elsewhere determined by the Board of Trustees of the Trust.

     This instrument shall constitute an amendment to the Declaration.
<PAGE>
 
     IN WITNESS WHEREOF, the undersigned have executed this instrument this
_____ day of ____________, 1996.


                                                        --------------------



                                                        --------------------
        


                                                        --------------------



                                                        --------------------



                                                        --------------------



                                                        --------------------



                                                        --------------------



                                                        --------------------
                        


                                                        --------------------
        
                                       2
<PAGE>
 
State of New York  )
                   )  ss.
Count of New York  )

     On _____________ ___, 1996, there personally appeared before me the above-
named [insert names of Trustees executing amendment] who severally acknowledged
the foregoing instrument to be their free act and deed.

                                        Before me



                                        --------------------------------------
                                        Notary Public


My commission expires



- - ---------------------
                                       3


 
                                                                    Exhibit 7(a)
                                                                    ------------
                                                      Draft -- February 23, 1996


                  Rule 12b-1 Distribution Plan and Agreement
 Lord Abbett Investment Trust -- Lord Abbett Balanced Series -- Class C Shares
 -----------------------------------------------------------------------------


     RULE 12b-1 DISTRIBUTION PLAN AND AGREEMENT dated as of July 12, 1996 by and
between LORD ABBETT INVESTMENT TRUST, a Delaware business trust (the "Fund"), on
behalf of its LORD ABBETT BALANCED SERIES (the "Series"), and LORD ABBETT
DISTRIBUTOR LLC, a New York limited liability company (the "Distributor").

     WHEREAS, the Fund is an open-end management investment company registered
under the Investment Company Act of 1940, as amended (the "Act"); and the
Distributor is the exclusive selling agent of the Fund's shares of beneficial
interest, including the Series' Class C shares (the "Shares") pursuant to the
Distribution Agreement between the Fund and the Distributor, dated as of the
date hereof, and

     WHEREAS, the Fund desires to adopt a Distribution Plan and Agreement (the
"Plan") for the Series with the Distributor, as permitted by Rule 12b-1 under
the Act, pursuant to which the Series may make certain payments to the
Distributor for payment to institutions and persons permitted by applicable law
and/or rules to receive such payments ("Authorized Institutions") in connection
with sales of Shares and for use by the Distributor as provided in paragraph 3
of this Plan, and

     WHEREAS, the Fund's Board of Trustees has determined that there is a
reasonable likelihood that the Plan will benefit the Series and the holders of
the Shares.

     NOW, THEREFORE, in consideration of the mutual covenants and of other good
and valuable consideration, receipt of which is hereby acknowledged, it is
agreed as follows:

     1.  The Fund hereby authorizes the Distributor to enter into agreements
with Authorized Institutions (the "Agreements") which may provide for the
payment to such Authorized Institutions of distribution and service fees which
the Distributor receives from the Series in order to provide incentives to such
Authorized Institutions (i) to sell Shares and (ii) to provide continuing
information and investment services to their accounts holding Shares and
otherwise to encourage their accounts to remain invested in the Shares.  The
Distributor may, from time to time, waive or defer payment of some fees payable
at the time of the sale of Shares provided for under paragraph 2 hereof.
<PAGE>
 
     2.  Subject to possible reduction as provided below in this paragraph 2,
the Series shall pay to the Distributor fees (i) at the time of sale of Shares
(a) for services, not to exceed .25 of 1% of the net asset value of the Shares
sold and (b) for distribution, not to exceed .75 of 1% of the net asset value of
the Shares sold; and (ii) at each quarter-end after the first anniversary of the
sale of Shares (a) for services, at an annual rate not to exceed .25 of 1% of
the average annual net asset value of Shares outstanding for one year or more
and (b) for distribution, at an annual rate not to exceed .75 of 1% of the
average annual net asset value of Shares outstanding for one year or more.  For
purposes of clause (ii) above, (A) Shares issued pursuant to an exchange for
Class C shares of another series of the Fund or another Lord Abbett-sponsored
fund (or for shares of a fund acquired by the Fund) will be credited with the
time held from the initial purchase of such other shares when determining how
long Shares mentioned in clause (ii) have been outstanding and (B) payments will
be based on Shares outstanding during any such quarter.  Sales in clause (i)
above exclude Shares issued for reinvested dividends and distributions, and
Shares outstanding in clause (ii) above include Shares issued for reinvested
dividends and distributions which have been outstanding for one year or more.
The Board of Trustees of the Fund shall from time to time determine the amounts,
within the foregoing maximum amounts, that the Series may pay the Distributor
hereunder.  Such determinations by the Board of Trustees shall be made by votes
of the kind referred to in paragraph 10 of this Plan.  The service fees men
tioned in this paragraph are for the purposes mentioned in clause (ii) of
paragraph 1 of this Plan and the distribution fees mentioned in this paragraph
are for the purposes mentioned in clause (i) of paragraph 1 and the second
sentence of paragraph 3 of this Plan.  The Distributor will monitor the payments
hereunder and shall reduce such payments or take such other steps as may be
necessary to assure that (x) the payments pursuant to this Plan shall be
consistent with Article III, Section 26, subparagraphs (d)(2) and (5) of the
Rules of Fair Practice of the National Association of Securities Dealers, Inc.
with respect to investment companies with asset-based sales charges and service
fees as the same may be in effect from time to time and (y) the Series shall not
pay with respect to any Authorized Institution service fees equal to more than
..25 of 1% of the average annual net asset value of Shares sold by (or
attributable to shares sold by) such Authorized Institution and held in an
account covered by an Agreement.

     3.  The Distributor may use amounts received as distribution fees hereunder
from the Series to finance any activity which is primarily intended to result in
the sale of Shares including, but not limited to, commissions or other payments
relating to selling or servicing efforts.  Without limiting the generality of
the foregoing, the Distributor may apply up to 10 of the total basis points
authorized by the Fund's Board of Trustees designated as the distribution fee
referred to in clause

                                       2
<PAGE>
 
(ii)(b) of paragraph 2 to expenses incurred by the Distributor if such expenses
are primarily intended to result in the sale of Shares.  The Fund's Board of
Trustees (in the manner contemplated in paragraph 10 of this Plan) shall approve
the timing, categories and calculation of any payments under this paragraph 3
other than those referred to in the foregoing sentence.

     4.  The net asset value of the Shares shall be determined as provided in
the Declaration of Trust of the Fund.  If the Distributor waives all or a
portion of fees which are to be paid by the Series hereunder, the Distributor
shall not be deemed to have waived its rights under this Agreement to have the
Series pay such fees in the future.

     5.  The Secretary of the Fund, or in his absence the Chief Financial
Officer, is hereby authorized to direct the disposition of monies paid or
payable by the Series hereunder and shall provide to the Fund's Board of
Trustees, and the Board of Trustees shall review, at least quarterly, a written
report of the amounts so expended pursuant to this Plan and the purposes for
which such expenditures were made.

     6.  Neither this Plan nor any other transaction between the parties hereto
pursuant to this Plan shall be invalidated or in any way affected by the fact
that any or all of the trustees, officers, shareholders, or other
representatives of the Fund are or may be "interested persons" of the
Distributor, or any successor or assignee thereof, or that any or all of the
trustees, officers, partners, or other representatives of the Distributor are or
may be "interested persons" of the Fund, except as otherwise may be provided in
the Act.

     7.  The Distributor shall give the Fund the benefit of the Distributor's
best judgment and good faith efforts in rendering services under this Plan.
Other than to abide by the provisions hereof and render the services called for
hereunder in good faith, the Distributor assumes no responsibility under this
Plan and, having so acted, the Distributor shall not be held liable or held
accountable for any mistake of law or fact, or for any loss or damage arising or
resulting therefrom suffered by the Fund, the Series or any of the shareholders,
creditors, trustees or officers of the Fund; provided however, that nothing
herein shall be deemed to protect the Distributor against any liability to the
Fund or the Series' shareholders by reason of willful misfeasance, bad faith or
gross negligence in the performance of its duties hereunder, or by reason of the
reckless disregard of its obligations and duties hereunder.

     8.  This Plan shall become effective on the date hereof, and shall continue
in effect for a period of more than one year from such date only so long as

                                       3
<PAGE>
 
such continuance is specifically approved at least annually by a vote of the
Board of Trustees of the Fund, including the vote of a majority of the trustees
who are not "interested persons" of the Fund and who have no direct or indirect
financial interest in the operation of this Plan or in any agreement related to
this Plan, cast in person at a meeting called for the purpose of voting on such
renewal.

     9.  This Plan may not be amended to increase materially the amount to be
spent by the Series hereunder without the vote of a majority of its outstanding
voting securities and each material amendment must be approved by a vote of the
Board of Trustees of the Fund, including the vote of a majority of the trustees
who are not "interested persons" of the Fund and who have no direct or indirect
financial interest in the operation of this Plan or in any agreement related to
this Plan, cast in person at a meeting called for the purpose of voting on such
amendment.

     10.  Amendments to this Plan other than material amendments of the kind
referred to in the foregoing paragraph 9 of this Plan may be adopted by a vote
of the Board of Trustees of the Fund, including the vote of a majority of the
trustees who are not "interested persons" of the Fund and who have no direct or
indirect financial interest in the operation of this Plan or in any agreement
related to this Plan. The Board of Trustees of the Fund may, by such a vote,
interpret this Plan and make all determinations necessary or advisable for its
administration.

     11.  This Plan may be terminated at any time without the payment of any
penalty by (a) the vote of a majority of the trustees of the Fund who are not
"interested persons" of the Fund and have no direct or indirect financial
interest in the operation of this Plan or in any agreement related to this Plan,
or (b) by a shareholder vote in compliance with Rule 12b-1 and Rule 18f-3 under
the Act as in effect at such time.  This Plan shall automatically terminate in
the event of its assignment.

     12.  So long as this Plan shall remain in effect, the selection and
nomination of those trustees of the Fund who are not "interested persons" of the
Fund are committed to the discretion of such disinterested trustees.  The terms
"interested persons," "assignment" and "vote of a majority of the outstanding
voting securities" shall have the same meaning as those terms are defined in the
Act.

                                       4
<PAGE>
 
     IN WITNESS WHEREOF, each of the parties has caused this instrument to be
executed in its name and on its behalf by its duly authorized representative as
of the date first above written.

                                             LORD ABBETT INVESTMENT TRUST



                                             By:_________________________
                                                   President



ATTEST:



___________________ 
Assistant Secretary



                                             LORD ABBETT DISTRIBUTOR LLC



                                             By:________________________


                                       5


 
                                                                    Exhibit 9(b)
                                 MORGAN GUARANTY
                                   Letterhead




February 9, 1996


Lord Abbett Investment Trus
767 Fifth Avenue
New York, N.Y. 10153

Attention:  Mr. Kenneth B. Cutler
                  Vice President


Dear Sirs:

     Pursuant to Section 15 of the Global Custody  Agreement,  dated October 20,
1993,  between  Lord  Abbett  Investment Trust  (hereinafter   called  the
"Corporation") and Morgan GuarantyTrust  Company of New York (hereinafter called
"Morgan"),  Morgan hereby  assigns to The Bank of New York  (hereinafter  called
"successor  custodian"),  as of January 1, 1996, all its rights and  obligations
under such Agreement, and successor custodian hereby agrees with you to be bound
by such Agreement in accordance with its terms.

Sincerely,


____________________                        Consented to:
Vice President                              LORD ABBETT  INVESTMENT TRUST
Mutual Funds Division


Agreed and Confirmed                        By:___________________________
THE BANK OF NEW YORK                      Vice President


By:________________________
      Vice President



 
                                                                  Exhibit 10 (b)

                                                      Draft -- February 27, 1996





                   Plans Pursuant to Rule 18f-3(d) under the
                         Investment Company Act of 1940

     Rule 18f-3 (the "Rule") under the Investment Company Act of 1940, as
amended (the "1940 Act"), requires that the Board of Directors or Trustees of an
investment company desiring to offer multiple classes pursuant to the Rule adopt
a plan setting forth the separate arrangement and expense allocation of each
class, and any related conversion features or exchange privileges.  This
document constitutes such a plan (individually, a "Plan" and collectively, the
"Plans") of each of the investment companies, or series thereof, listed on
Schedule A attached hereto (each, a "Fund").  The Plan of any Fund is subject to
amendment by action of the Board of Directors or Trustees (the "Board") of such
Fund and without the approval of shareholders of any class, to the extent
permitted by law and by the governing documents of such Fund.

     The Board, including a majority of the non-in terested Board members, has
determined that the following separate arrangement and expense allocation, and
the related exchange privileges, of each class of each Fund are in the best
interest of each class of each Fund individually and each Fund as a whole:
<PAGE>
 
     1.  Class Designation.  Fund shares shall initially be divided into Class A
         -----------------                                                      
shares and Class C shares.


     2.   Sales Charges and Distribution and Service Fees.
          ----------------------------------------------- 

     (a)  Initial Sales Charge.  Class A shares will be traditional front-end
          --------------------                                               
sales charge shares, offered at their net asset value ("NAV") plus a sales
charge in the case of each Fund as described in such Fund's Prospectus as from
time to time in effect.

     Class C shares will be offered at their NAV with out an initial sales
charge.

     (b)  Service and Distribution Fees.  In respect of the Class A shares and
          -----------------------------                                       
Class C shares, each Fund will pay service and distribution fees under plans
adopted for such classes pursuant to Rule 12b-1 under the 1940 Act (each a "12b-
1 Plan").

     Pursuant to a 12b-1 Plan with respect to the Class A shares, if effective,
each Fund will pay (i) at the time such shares are sold, a one-time distribution
                    -                                                           
fee of up to 1% of the NAV of the shares sold in the amount of $1 million or
more, including sales qualifying at such level under the rights of accumulation
and statement of intention privileges, or to retirement plans with 100 or more
eligible employees, as described in the Fund's Prospectus as from time to time
in effect, (ii) a continuing distribution fee
            --                               
                                       2
<PAGE>
 
at an annual rate of 0.10% of the average daily NAV of the Class A share
accounts of dealers who meet certain sales and redemption criteria, and (iii) a
                                                                         ---   
continuing service fee at an annual rate not to exceed 0.25% of the average
daily NAV of the Class A shares.  The Board will have the authority to increase
the distribution fees payable under such 12b-1 Plan by a vote of the Board,
including a majority of the in dependent directors thereof, up to an annual rate
of 0.50% of the average daily NAV of the Class A shares.  The effective dates of
various of the 12b-1 Plans for the Class A shares are based on achievement by
the Funds of specified total NAV's for the Class A shares of each Fund.

     Pursuant to a 12b-1 Plan with respect to the Class C shares, each Fund will
pay a one-time service and distribution fee at the time such shares are sold of
up to 1% of their NAV and a continuing annual fee, commencing 12 months after
the first anniversary of such sale, of up to 1% of the average annual NAV of
such shares then outstanding (each fee comprised of .25% in service fees and
..75% in distribution fees).

     (c)  Contingent Deferred Reimbursement Charges ("CDRC").  Subject to some
          --------------------------------------------------                  
exceptions, Class A shares subject to the one-time sales distribution fee of up
to 1% under the Rule 12b-1 Plan for the Class A shares will be subject to a CDRC
equal to 1% of the lower of the cost or then NAV of such shares if the shares
are redeemed for cash
                                       3
<PAGE>
 
on or before the end of the twenty-fourth month after the month in which the
shares were purchased.

     Class C shares will be subject to a CDRC equal to 1% of the lower of the
cost or then NAV of the shares if the shares are redeemed for cash before the
first anniversary of their purchase.


     3.  Liability and Expense Allocation.  The following expenses and
         --------------------------------                             
liabilities therefor shall be allocated, to the extent such expenses can
reasonably be identified as relating to a particular class, on a class-specific
basis: (a) fees under a 12b-1 Plan applicable to a specific class (net of any
CDRC paid with respect to shares of such class and retained by the Fund) and any
other costs relating to implementing or amending such Plan, including obtaining
shareholder approval of such Plan or any amendment thereto; (b) transfer and
shareholder servicing agent fees and shareholder servicing costs identifiable as
being attrib utable to the particular provisions of a specific class; (c)
stationery, printing, postage and delivery expenses related to preparing and
distributing materials such as shareholder reports, prospectuses and proxy
statements to current shareholders of a specific class; (d) Blue Sky reg
istration fees incurred by a specific class; (e) Securities and Exchange
Commission registration fees incurred by a specific class; (f) Board fees or
expenses identifiable as
                                       4
<PAGE>
 
being attributable to a specific class; (g) auditor's fees and expense relating
solely to a specific class; (h) litigation expenses and legal fees and expense
relating solely to a specific class; (i) expenses incurred in connection with
shareholders meetings as a result of issues relating solely to a specific class
and (j) other expenses relating solely to a specific class.  All such
liabilities and expenses incurred by a class of shares will be charged directly
to the net assets of the particular class and thus will be borne on a pro rata
basis by the outstanding shares of such class.


     4.  Dividends.  Dividends paid by a Fund as to each class of its shares, to
         ---------                                                              
the extent any dividends are paid, will be calculated in the same manner, will
be paid at the same time, and will be in the same amount, except that any
liabilities and expenses allocated to a class as pro vided above will be borne
exclusively by that class.

     5.  Net Asset Values.  The NAV of each share of a class of a Fund shall be
         ----------------                                                      
determined in accordance with the Articles of Incorporation or Declaration of
Trust of such Fund with appropriate adjustments to reflect the differing
allocations of liabilities and expenses of such Fund between its classes as
provided above.  [Attached hereto as Exhibit

                                       5
<PAGE>
 
A is a sample calculation of the NAV's of a Class A share and a Class C share.]


     6.  Conversion Features.  Subject to amendment by the Board, no class of
         -------------------                                                 
shares shall be subject to any automatic conversion feature at this time.


     7.  Exchange Privileges.  Except as set forth in the Fund's prospectus,
         -------------------                                                
shares of any class of a Fund may be exchanged, at the holder's option, for
shares of the same class of another Fund, or other Lord Abbett-sponsored fund or
series thereof, without the imposition of any sales charge, fee or other charge.


     Each Plan is qualified by and subject to the terms of the then current
prospectus for the applicable Fund; provided, however, that none of the terms
set forth in any such prospectus shall be inconsistent with the terms con tained
herein.  The prospectus for each Fund contains addi tional information about
that Fund's classes and its multiple-class structure.

     Each Plan is being adopted for a Fund with the approval of, and all
material amendments thereto must be approved by, a majority of the Board of such
Fund, including a majority of the Board who are not interested persons of the
Fund.
                                       6
<PAGE>
 
                                                                      Schedule A
                                                                      ----------




                       The Lord Abbett - Sponsored Funds
                      Establishing Multi-Class Structures
                      -----------------------------------


Lord Abbett Affiliated Fund, Inc.
Lord Abbett Bond-Debenture Fund, Inc.
Lord Abbett Developing Growth Fund, Inc.
Lord Abbett Global Fund, Inc.
      Equity Series
      Income Series
Lord Abbett Investment Trust
      Lord Abbett Balanced Series
      Lord Abbett Limited Duration U.S. Government Securities Series
      Lord Abbett U.S. Government Securities Series
Lord Abbett Securities Trust
      Lord Abbett Growth & Income Trust
Lord Abbett Tax-Free Income Fund, Inc.
      California Series
      National Series
      New York Series
Lord Abbett Tax-Free Income Trust
      Florida Series
Lord Abbett U.S. Government Securities Money Market Fund, Inc.


                                                                     Exhibit 11
                                                                     ----------
                                                     Draft -- February 27, 1996 
  
                                                     

                       [Debevoise & Plimpton Letterhead]









Lord Abbett Investment Trust
The General Motors Building
767 Fifth Avenue
New York, New York  10153


                          Lord Abbett Investment Trust
                      Registration Statement on Form N-14
                      -------------------------------------

Ladies and Gentlemen:

     We have acted as counsel to Lord Abbett Investment Trust (the
"Registrant"), a Delaware business trust, in connection with the preparation and
filing with the Securities and Exchange Commission under the Securities Act of
1933, as amended, of a Registration Statement on Form N-14 (File No. 811-7988)
(the "Registration Statement"), relating to the issuance of shares of beneficial
interest of the Lord Abbett Balanced Series (the "Acquiring Fund"), a series of
the Registrant.

     Such shares have been established and designated as the Class C shares (the
"Class C shares").  The Class C shares are to be issued to Lord Abbett Balanced
Trust (the "Acquired Trust"), a series of Lord Abbett Securities Trust (the
"Securities Trust"), a Delaware business trust,
<PAGE>
 
Lord Abbett Investment Trust
Page 2


pursuant to an Agreement and Plan of Reorganization (the "Acquired Trust Plan")
between the Registrant, on behalf of the Acquiring Fund, and the Securities
Trust, on behalf of the Acquired Trust, substantially in the form of Exhibit A
included in Part A of the Registration Statement.  Such issuance of the Class C
shares is to be made in connection with the acquisition by the Acquiring Fund of
the assets of, and the assumption by the Acquiring Fund of the liabilities of,
the Acquired Trust.

     In so acting, we have examined and relied upon the originals, or copies
certified or otherwise identified to our satisfaction, of such documents,
records, certificates and other instruments and have made such other
investigations as in our judgment are necessary or appropriate to enable us to
render the opinion expressed below.  We have not, however, undertaken any
independent investigation of any factual matter set forth in any of the
foregoing.

     Based on the foregoing, we are of the following opinion:

     Assuming that the Acquired Trust and the Acquiring Fund duly execute and
  deliver the Acquired Trust Plan, that the Acquired Trust Plan and the
  reorganization provided for thereby are duly approved by the shareholders of
  the Acquired Trust and that the transactions contemplated by the Acquired
  Trust Plan are duly consummated, the Class C shares issued pursuant to the
  Acquired Trust Plan will be legally issued, fully paid and non-assessable.
 
     This opinion is limited solely to the federal law of the United States and
the Delaware Business Trust Act as in effect on the date hereof and the relevant
facts that exist as of the date hereof.  Without limiting the generality of the
foregoing, we express no opinion concerning other laws of the State of Delaware,
including the securities laws of such state, or the laws of any other
jurisdiction other than the United States.  No assurance can be given that the
law or facts will not change, and we have not undertaken to advise you or any
other person with respect to any event subsequent to the date hereof.

     We are delivering this opinion to you and, without our prior written
consent, no other persons are entitled to rely on this opinion.  We consent to
the filing of this
<PAGE>
 
Lord Abbett Investment Trust
Page 3


opinion as an Exhibit to the Registration Statement.  In giving such consent, we
do not thereby concede that we are within the category of persons whose consent
is required under Section 7 of the Securities Act of 1933 or the Rules and
Regulations of the Securities and Exchange Commission thereunder.


                                                     Very truly yours,


 
                                                                   Exhibit 12
                                                                   ----------


                       [Debevoise & Plimpton Letterhead]






                                        [Dated as of the Closing Date]



Lord Abbett Investment Trust
The General Motors Building
767 Fifth Avenue
New York, New York  10153

Lord Abbett Securities Trust
The General Motors Building
767 Fifth Avenue
New York, New York  10153


                      Agreement and Plan of Reorganization
                          dated as of _______ __, 1996
                                 by and between
                         Lord Abbett Investment Trust,
                            on behalf of its series,
                          Lord Abbett Balanced Series,
                       and Lord Abbett Securities Trust,
                            on behalf of its series,
                          Lord Abbett Balanced Trust
                     ------------------------------------


Ladies and Gentlemen:

     We have acted as counsel to Lord Abbett Investment
Trust, a Delaware business trust ("Investment Trust"), acting on behalf of its
series, Lord Abbett Balanced Series ("Acquiring Fund"), and Lord Abbett
Securities Trust, a
<PAGE>
 
Lord Abbett Investment Trust
Lord Abbett Securities Trust
                                     2                   [Date of the Closing]


Delaware business trust ("Securities Trust"), acting on behalf of its series,
Lord Abbett Balanced Trust ("Acquired Fund"), in connection with the proposed
acquisition (the "Reorganization") of all of the assets of Acquired Fund by
Acquiring Fund pursuant to the Agreement and Plan of Reorganization dated as of
_______ __, 1996, by and between Investment Trust, on behalf of Acquiring Fund,
and Securities Trust, on behalf of Acquired Fund (the "Reorganization
Agreement").

     In so acting, we have participated in the preparation of the
Reorganization Agreement and the preparation and filing by Acquiring Fund with
the Securities and Exchange Commission on ________ __, 1996 of a Registration
Statement on Form N-14, containing a Proxy Statement and Prospectus relating to
the proposed Reorganization and to the shares of common stock of Acquiring Fund
to be issued to Acquired Fund shareholders in the Reorganization pursuant to the
Reorganization Agreement.

     As required by Section 8.5 of the Reorganization Agreement, you have
requested that we render the opinion set forth below.  In rendering such
opinion, we have examined and relied upon the accuracy as of the date hereof of
the representations and warranties as to factual matters set forth in the
documents referred to above and the Letters of Representation, dated as of the
date hereof, that you have provided to us, copies of which are attached hereto.
We have also examined the originals, or copies certified or otherwise identified
to our satisfaction, of such records, documents, certificates or other
instruments as in our judgment are necessary or appropriate to enable us to
render the opinions set forth below.  We have not, however, undertaken any
independent investigation of any factual matter set forth in any of the
foregoing.

     Subject to the foregoing and to the qualifications and limitations set
forth herein, and assuming that the Reorganization is consummated in accordance
with the Reorganization Agreement and as described in the Registration
Statement, we are of the opinion that for United States federal income tax
purposes:
<PAGE>
 

Lord Abbett Securities Trust
                                     3                   [Date of the Closing]


         1.  The acquisition by Acquiring Fund of all of the assets of Acquired
     Fund solely in exchange for the issuance of Acquiring Fund shares to
     Acquired Fund and the assumption of all of the Acquired Fund liabilities by
     Acquiring Fund, followed by the distribution by Acquired Fund, in complete
     liquidation, of the Acquiring Fund shares to Acquired Fund shareholders in
     exchange for their Acquired Fund shares, will be treated as a
     "reorganization" within the meaning of Section 368(a) of the Internal
     Revenue Code of 1986, as amended (the "Code").

          2.  Acquiring Fund and Acquired Fund will each be "a party to the
     reorganization" within the meaning of Section 368(b) of the Code.

          3.  No gain or loss will be recognized by Acquired Fund upon the 
     transfer of Acquired Fund's assets to Acquiring Fund in exchange for
     Acquiring Fund shares and the assumption by Acquiring Fund of the
     liabilities of Acquired Fund or upon the distribution of Acquiring Fund
     shares to Acquired Fund's shareholders.

          4.  No gain or loss will be recognized by Acquiring Fund upon the 
     receipt of the assets of Acquired Fund in exchange for Acquiring Fund
     shares and the assumption by Acquiring Fund of the liabilities of Acquired
     Fund.

          5.  No gain or loss will be recognized by shareholders of Acquired 
     Fund upon the exchange of their Acquired Fund shares for Acquiring Fund
     shares.

          6.  The aggregate tax basis of the Acquiring Fund shares received by
     any Acquired Fund shareholder pursuant to the Reorganization will be the
     same as the aggregate tax basis of the Acquired Fund shares held by such
     shareholder immediately prior to the Reorganization, and the holding period
     for the Acquiring Fund shares to be received by any Acquired Fund
     shareholder will include the period during which the Acquired Fund shares
     exchanged therefor were held by such shareholder (provided that the
     Acquired Fund
<PAGE>
 
Lord Abbett Securities Trust
                                     4                   [Date of the Closing]


     shares are held as capital assets on the date of the Reorganization).

          7.  The tax basis of Acquired Fund's assets acquired by Acquiring 
     Fund will be the same as the tax basis of such assets to Acquired Fund
     immediately prior to the Reorganization, and the holding period of the
     assets of Acquired Fund in the hands of Acquiring Fund will include the
     period during which those assets were held by Acquired Fund.

     This opinion is limited solely to the federal law of the United States
as in effect on the date hereof and the relevant facts that exist as of the date
hereof.  No assurance can be given that the law or facts will not change, and we
have not undertaken to advise you or any other person with respect to any event
subsequent to the date hereof.

          We are delivering this opinion to you and, without our prior written
consent, no other persons are entitled to rely on this opinion.


                                               Very truly yours,
<PAGE>
 
                       [Debevoise & Plimpton Letterhead]





                                                        March 1 , 1996


Lord Abbett Investment Trust
The General Motors Building
767 Fifth Avenue
New York, New York 10153


Lord Abbett Securities Trust
The General Motors Building
767 Fifth Avenue
New York, New York 10153

Ladies and Gentlemen:

     We hereby consent to the filing of the draft opinion attached hereto as an
exhibit to the Registration Statement on Form N-14, to be filed by Lord Abbett
Invest ment Trust, a Delaware business trust ("Investment Trust"), with the
Securities and Exchange Commission, containing a Proxy Statement and Prospectus
relating to (i) the proposed acquisition (the "Reorganization") of all of the
             -                                                               
assets of Lord Abbett Balanced Trust ("Acquired Fund"), a series of Lord Abbett
Securities Trust, a Delaware business trust ("Securities Trust") by Lord Abbett
Balanced Series ("Acquiring Fund"), a series of Investment Trust, pursuant to an
Agreement and Plan of Reorganization to be entered into by and between
Investment Trust, on behalf of Acquiring Fund, and Securities Trust, on behalf
of Acquired Fund and (ii) the shares of common stock of Acquiring Fund to be
                      --                                                    
issued to Acquired Fund shareholders in the Reorganization. We also hereby
consent to the use of our name under the caption "Information About the
Reorganization -- Federal Income Tax Consequences" in the Registration
Statement.  In giving such consent, we do not thereby concede that we are within
the category of persons whose consent is required under Section 7 of the
Securities Act of 1933 or the Rules and Regulations of the Securities and
Exchange Commission thereunder.


                                                     Very truly yours,

                                            /S/ DEBEVOISE & PLIMPTON

                                                                 Exhibit 14(a)

CONSENT OF INDEPENDENT AUDITORS


We consent to the use in this Registration Statement on Form N-14 of Lord Abbett
Investment  Trust of our reports on the financial  statements of the Lord Abbett
Investment  Trust -  Balanced  Series  dated  December  8, 1995 and Lord  Abbett
Securities Trust - Balanced Trust dated December 8, 1995, which are contained in
the  respective  1995 Annual Reports and are  incorporated  by reference in such
Registration  Statement.  We also  consent  to the  references  to us under  the
headings  "Financial  Highlights"  in the Prospectus and to the references to us
under the headings of  "Investment  Advisory and Other  Services" and "Financial
Statements" in the Statement of Additional Information of Lord Abbett Investment
Trust - Balanced Series dated December 27, 1994 and Lord Abbett Securities Trust
- - - Balanced Trust dated December 27, 1994, which are incorporated by reference in
such Registration Statement.




DELOITTE & TOUCHE LLP

New York, New York
February 29, 1996




 
                                                                  Exhibit 14 (b)
                                                                  --------------








                                                                January 26, 1996



BY HAND DELIVERY
- - ----------------

Internal Revenue Service
Associate Chief Counsel (Domestic)
1111 Constitution Avenue, N.W.
Washington, D.C.  20224

Attention:    CC:DOM:FIP2
- - ---------                
              Susan Baker
              Room 4316

                               Re:  TR-31-2400-95
                           Request for Rulings Under
                         Sections 562 and 852(b)(2)(D)
                         -----------------------------

Dear Associate Chief Counsel (Domestic):

     By letter dated October 19, 1995 (the "Original Request"), the Lord Abbett
funds listed on Schedule A thereto requested that the Internal Revenue Service
issue rulings (1) that the dividends paid on each class of shares issued by them
               -                                                                
will be eligible for the dividends-paid deduction under sections 561 and
852(b)(2)(D) of the Internal Revenue Code and (2) that the creation of multiple
                                               -                               
classes of shares will not affect the classification of any such fund as a
regulated investment company under section 851(a) and (h) of the Code.
<PAGE>
 
Internal Revenue Service               2                        January 26, 1996


     We now wish to request that you issue similar rulings with respect to two
additional funds, Growth and Income Trust of Lord Abbett Securities Trust and
the Small-Cap Series of Lord Abbett Research Fund, Inc.  All defined terms in
this request have the meanings set forth in the Original Request.

     Growth and Income Trust
     -----------------------

     Growth and Income Trust (TIN 13-3731505) is a series of Lord Abbett
Securities Trust ("Securities Trust"), an open-end management investment company
organized as a Delaware business trust on February 26, 1993.  Securities Trust
is registered as an open-end management investment company under the 1940 Act.
A copy of Securities Trust's most recent Post-Effective Amendment to its
Registration Statement on Form N-1A, dated June 15, 1995, is attached as Exhibit
N.

     Growth and Income Trust is diversified and has met and intends to continue
to meet the diversification rules under Subchapter M of the Internal Revenue
Code.  Its taxable year ends on October 31.  The investment objective of Growth
and Income Trust is long-term growth of capital and income without excessive
fluctuations in market value.  It normally invests in common stocks of large,
seasoned companies in sound financial condition which are expected to show
above-average price appreciation.

     Growth and Income Trust currently has outstanding only a single class of
shares.  All shares have equal voting rights and equal rights with respect to
dividends, assets, and liquidation.  They are fully paid and non-assessable when
issued and have no preemptive or conversion rights.  There are no restrictions
on transfer.

     Growth and Income Trust has adopted a Rule 12b-1 Plan.  Under the 12b-1
Plan, Growth and Income Trust pays Lord Abbett (1) a service fee and a
                                                -                     
distribution fee, at the time shares are sold, not to exceed .25% and .75%,
respectively, of the net asset value of such shares and (2) at each quarter-end
                                                         -                     
after the first anniversary of the sale of shares, fees for services and
distribution at annual rates not to exceed .25% and .75%, respectively, of the
average annual net asset value of such shares outstanding (payments with respect
to shares
<PAGE>
 
Internal Revenue Service               3                        January 26, 1996


not outstanding during the full quarter are prorated).  Sales in clause (1)
exclude shares issued for reinvested dividends and distributions and shares
outstanding in clause (2) include shares issued for reinvested dividends and
distributions after the first anniversary of their issuance.  Lord Abbett may
retain from the quarterly distribution fee, for the payment of distribution
expenses incurred directly by it, an amount not to exceed .10% of the average
annual net asset value of such shares outstanding.  No dealer shall receive for
service more than .25% of the average annual net asset value of shares sold by
the dealer.  Lord Abbett is required to pay the sales distribution fee to
dealers as compensation for selling Growth and Income Trust's shares.

     If shares of Growth and Income Trust are redeemed for cash before the first
anniversary of their purchase, the redeeming shareholder will be required to pay
a contingent deferred reimbursement charge of 1% of the lower of cost or the
then net asset value of the shares redeemed.  If the shares are exchanged into
another series of Securities Trust or Lord Abbett U.S. Government Securities
Money Market Fund ("GSMMF") and subsequently redeemed before the first
anniversary of their original purchase, the charge will be collected by the
other series or GSMMF for Growth and Income Trust.

     The Small-Cap Series
     --------------------

     The Small-Cap Series (TIN 13-3862601) is a newly-organized series of
Research Fund, which is described at page 9 of the Original Request.  It plans
to begin offering its shares on or after February 20, 1996.  The Small-Cap
Series intends to qualify as a regulated investment company under Subchapter M
of the Internal Revenue Code.  The Small Cap Series' taxable year ends on
November 30.  The investment objective of the Small-Cap Series is to seek long-
term capital appreciation through investments primarily in equity securities
which are believed to be undervalued in the marketplace. A copy of Research
Fund's most recent amendment to its Form N-1A describing the Small-Cap Series,
which was filed with the Securities and Exchange Commission on December 7, 1995,
is attached as Exhibit O.

     The Small-Cap Series currently has outstanding only a single class of
shares, $.001 par value.  All shares have
<PAGE>
 
Internal Revenue Service               4                        January 26, 1996


equal voting rights and equal rights with respect to dividends, assets, and
liquidation.  They are fully paid and nonassessable when issued and have no
preemptive or conversion rights.  There are no restrictions on transfer.

     As stated in the Original Request, Research Fund has not adopted a Rule
12b-1 Plan.

     The Statement of Facts, Rulings Requested, Dis cussion and Procedural
Statements with respect to Growth and Income Trust and the Small-Cap Series are
otherwise as set forth in the Original Request, except that "Revenue Procedure
96-1" is substituted for "Revenue Procedure 95-1" and the check for the user fee
specified in section 14.02 and Appendix A of Revenue Procedure 96-1 is endorsed
in the amount of $300.

                                             Respectfully submitted,



                                             Seth L. Rosen
<PAGE>
 
                                                             October 19, 1995



BY HAND DELIVERY
- - ----------------

Internal Revenue Service
Associate Chief Counsel (Domestic)
1111 Constitution Avenue, N.W.
Washington, D.C.  20224

Attention:  CC:DOM:FI&P
- - ---------              


                           Request for Rulings Under
                         Sections 562 and 852(b)(2)(D)
                         -----------------------------

     The Lord Abbett funds listed on Schedule A (collectively, the "Lord Abbett
Funds" or the "Funds") hereby request that the Internal Revenue Service (the
"Service") issue rulings (1) that the dividends paid on each class of shares
                          -                                                 
issued by them will be eligible for the dividends-paid deduction under sections
561 and 852(b)(2)(D) of the Internal Revenue Code (the "Code") and (2) that the
                                                                    -          
creation of multiple classes of shares will not affect the classification of any
Fund as a regulated investment company under section 851(a) and (h) of the Code.
<PAGE>
 
Internal Revenue Service               2                     October 19, 1995

                              STATEMENT OF FACTS
                              ------------------

THE FUNDS
- - ---------

          The principal office of each of the Lord Abbett Funds is located at
The General Motors Building, 767 Fifth Avenue, New York, New York 10153-0203
(telephone number (212) 848-1800).  Each of the Lord Abbett Funds files its tax
returns with the Internal Revenue Service Center in Holtsville, New York and is
subject to the audit jurisdiction of the District Director, Manhattan District,
New York, New York.

          The Investment Manager for each of the Lord Abbett Funds is Lord,
Abbett & Co. ("Lord Abbett"), a partnership organized under the laws of New
York, located at The General Motors Building, 767 Fifth Avenue, New York, New
York 10153-0203 (Taxpayer ID No. 13-5620131).  Pursuant to a Distribution
Agreement for each Fund, Lord Abbett also acts as the distributor of the shares
for each of the Funds (other than Lord Abbett Research Fund Inc.).

          AFFILIATED FUND, INC. (TIN 13-6020600) ("Affiliated Fund") is a
diversified, open-end management investment company re-organized in 1934 and
incorporated under the laws of Maryland on November 26, 1975.  The fund is
registered as a diversified, open-end management investment company under the
Investment Company Act of 1940, 15 U.S.C. (S) 80a-1 et seq. (the "1940 Act").  A
copy of Affiliated Fund's most recent Post-Effective Amendment to its
Registration Statement on Form N-1A, dated March 1, 1995 containing the fund's
Prospectus and Statement of Additional Information, is attached as Exhibit A.

          Affiliated Fund currently has a single class of shares, $1.25 par
value, with equal rights as to voting, dividends, assets and liquidation.  There
are no conversion or preemptive rights, and no restrictions on transfer.
Affiliated Fund qualifies as a regulated investment company under Subchapter M
of the Internal Revenue Code.  Its taxable year ends on October 31.  The
investment objective of Affiliated Fund is long-term growth of capital and
income without excessive fluctuations in market value.
<PAGE>
 
Internal Revenue Service               3                     October 19, 1995



          Affiliated Fund has adopted a distribution plan pursuant to Rule 12b-
1, 17 C.F.R. 270.12b-1, promulgated pursuant to Section 12(b) of the 1940 Act (a
"12b-1 Plan"). Under its 12b-1 Plan, Affiliated Fund pays Lord Abbett (1) an
                                                                       -    
annual service fee (payable quarterly) of .15% of the average daily net asset
value of Affiliated Fund's shares sold by dealers prior to June 1, 1990 and .25%
of the average daily net asset value of shares sold by dealers on or after that
date and (2) a one-time 1% sales distribution fee, at the time of sale, on all
          -                                                                   
sales of over $1 million by dealers, including sales qualifying at such level
under the rights of accumulation and statement of intention privileges. /1/
Lord Abbett is required to pay the sales distribution fee to dealers as
compensation for selling Affiliated Fund's shares.

          LORD ABBETT BOND-DEBENTURE FUND, INC. (TIN 13-2669319) ("Bond Fund")
is a diversified, open-end management investment company incorporated under the
laws of Maryland on January 23, 1976.  Bond Fund is registered as a diversified,
open-end management investment company under the 1940 Act.  A copy of the fund's
most recent Post-

- - --------------------

1.   For each of the Funds, each holder of Fund shares on which the 1% sales
distribution fee has been paid is required to pay to the Fund a contingent
deferred reimbursement charge of 1% of the original cost or the then net asset
value, whichever is less, of all shares so purchased which are redeemed out of
the Lord Abbett Funds on or before the end of the twenty-fourth month after the
month in which the purchase occurred (subject to certain exceptions, including
certain redemptions by tax-qualified plans under Section 401 of the Internal
Revenue Code).  If the shares have been exchanged into another Lord Abbett Fund
and are thereafter redeemed out of the Lord Abbett family on or before the end
of such twenty-fourth month, the charge will be collected for the initial Fund
by the other Fund. Each Fund also collects such a charge for other Lord Abbett
Funds in similar situations.  Shares of a Fund or series on which the 1% sales
distribution fee has been paid may not be exchanged into a Fund or series with a
Rule 12b-1 Plan for which the payment provisions have not been in effect for at
least one year.
<PAGE>
 
Internal Revenue Service               4                     October 19, 1995



Effective Amendment to its Registration Statement on Form N-1A, dated May 1, 
1995, is attached as Exhibit B.

          Bond Fund currently has outstanding a single class of shares, $1.00
par value, with equal rights as to voting, dividends, assets and liquidation.
The shares are fully paid and nonassessable when issued and have no preemptive
or conversion rights.  There are no restrictions on transfer. Bond Fund
qualifies as a regulated investment company under Subchapter M of the Internal
Revenue Code.  Its taxable year ends on December 31.  The investment objective
of Bond Fund is high current income and the opportunity for capital appreciation
to produce a high total return through a professionally-managed portfolio
consisting primarily of convertible and discount debt securities, many of which
are lower-rated.

          Bond Fund has adopted a Rule 12b-1 Plan.  Under its Rule 12b-1 Plan,
Bond Fund pays Lord Abbett (1) an annual service fee (payable quarterly) of .25%
                            -                                                   
of the average daily net asset value of Bond Fund's shares sold by dealers on or
after June 1, 1990 and .15% of the average daily net asset value of shares sold
by dealers prior to that date and (2) a one-time 1% sales distribution fee, at
                                   -                                          
the time of sale, on all sales over $1 million by dealers, including sales
qualifying at such level under the rights of accumulation and statement of
intention privileges.  Lord Abbett is required to pay the sales distribution fee
to dealers as compensation for selling Bond Fund shares.

          LORD ABBETT CALIFORNIA TAX-FREE INCOME FUND, INC. (TIN 13-3271131)
("California Fund") is a diversified, open-end management investment company
incorporated under the laws of Maryland on May 21, 1985.  California Fund is
registered as a diversified, open-end management investment company under the
1940 Act.  A copy of the fund's most recent Post-Effective Amendment to its
Registration Statement on Form N-1A, dated January 1, 1995, is attached as
Exhibit C.

          California Fund has a single class of shares, $.001 par value, with
equal rights as to voting, dividends, assets and liquidation.  They are fully
paid and nonassessable when paid for and issued and have no preemptive or
conversion rights.  There are no restrictions
<PAGE>
 
Internal Revenue Service               5                     October 19, 1995



on transfer.  California Fund qualifies as a regulated investment company under
Subchapter M of the Internal Revenue Code.  Its taxable year ends on August 31.
The investment objective of California Fund is to seek as high a level of
interest income exempt from both federal income tax and California personal
income tax as is consistent with preservation of capital by investing primarily
in a diversified portfolio of California municipal bonds.

          California Fund has adopted a Rule 12b-1 Plan whereby California Fund
pays Lord Abbett (1) an annual fee for services (payable quarterly) of .25% of
                  -                                                           
the average daily net asset value of shares sold by dealers and (2) a one-time
                                                                 -            
1% sales distribution fee, at the time of sale, on all sales over $1 million by
dealers, including sales qualifying at such level under the rights of
accumulation and statement of intention privileges.  Lord Abbett is required to
pay the sales distribution fee to dealers as compensation for selling California
Fund's shares.

          LORD ABBETT DEVELOPING GROWTH FUND, INC. (TIN 13-2755091) ("Growth
Fund") is a diversified, open-end management investment company incorporated
under the laws of Maryland on August 21, 1978 and its predecessor corporation
was organized on July 11, 1973.  Growth Fund is registered as a diversified,
open-end management investment company under the 1940 Act.  A copy of Growth
Fund's most recent Post-Effective Amendment to its Registration Statement on
Form N-1A, dated June 1, 1995, is attached as Exhibit D.

          Growth Fund has a single class of shares, $1.00 par value, with equal
rights to voting, dividends, assets, and liquidation.  There are no conversion
or preemptive rights and no restrictions on transfer.  Growth Fund qualifies as
a regulated investment company under Subchapter M of the Internal Revenue Code.
Its taxable year ends on January 31.  The investment objective of Growth Fund is
long-term growth of capital through a diversified and actively-managed portfolio
consisting of developing growth companies, many of which are traded over the
counter.

          Growth Fund has adopted a Rule 12b-1 Plan.  Under the 12b-1 Plan,
Growth Fund pays Lord Abbett (1) an annual service fee (payable quarterly) of
                              -                                              
..25% of the average daily net asset value of Growth Fund's shares sold by
dealers on
<PAGE>
 
Internal Revenue Service               6                     October 19, 1995



or after June 1, 1990 and .15% of the average daily net asset value of shares
sold by dealers prior to that date and (2) a one-time 1% sales distribution fee,
                                        -                                       
at the time of sale, on all sales over $1 million by dealers, including sales
qualifying at such level under the rights of accumulation and statement of
intention privileges.  Lord Abbett is required to pay the sales distribution fee
to dealers as compensation for selling Growth Fund's shares.

          LORD ABBETT FUNDAMENTAL VALUE FUND, INC. (TIN 13-3342841)
("Fundamental Value Fund") is a diversified, open-end management investment
company incorporated under the laws of Maryland on March 26, 1986.  Fundamental
Value Fund is registered as a diversified, open-end management investment
company under the 1940 Act.  A copy of the fund's most recent Post-Effective
Amendment to its Registration Statement on Form N-1A, dated November 1, 1994, is
attached as Exhibit E.

          All of Fundamental Value Fund's shares are of a single class and each
has a par value of $.10.  All shares have equal noncumulative voting rights and
equal rights with respect to dividends, assets and liquidation.  There are no
conversion or preemptive rights, and no restrictions on transfer.  Fundamental
Value Fund qualifies as a regulated investment company under Subchapter M of the
Internal Revenue Code.  Its taxable year ends on June 30.  The investment
objectives of Fundamental Value Fund are growth of capital and growth of income
consistent with reasonable risk.  Production of current income is a secondary
consideration.

          Fundamental Value Fund has adopted a Rule 12b-1 Plan.  The 12b-1 Plan
provides for the payment to Lord Abbett of (1) an annual service fee (payable
                                            -                                
quarterly) of .25% of the average daily net asset value of Fundamental Value
Fund shares sold by dealers, and (2) a one-time 1% sales distribution fee, at
                                  -                                          
the time of sale, on all sales over $1 million by dealers, including sales
qualifying at such level under the rights of accumulation and statement of
intention privileges.  Lord Abbett is required to pay the full amount of the
sales distribution fees to dealers as compensation for selling Fundamental Value
Fund's shares.
<PAGE>
 
Internal Revenue Service               7                     October 19, 1995

          LORD ABBETT GLOBAL FUND, INC. ("Global Fund") is a diversified, open-
end management investment company incorporated under the laws of Maryland on
February 23, 1988.  The fund is registered as a diversified, open-end management
investment company under the 1940 Act.  A copy of the fund's most recent Post-
Effective Amendment to its Registration Statement on Form N-1A, dated May 1,
1995, is attached as Exhibit F.

          Global Fund is organized as a series fund, currently comprised of two
separate portfolios, EQUITY SERIES (TIN 13-3460109) and INCOME SERIES (TIN 13-
3460111). Each series qualifies as a regulated investment company under
Subchapter M of the Internal Revenue Code.   Each series' taxable year ends on
December 31.  The investment objective of Equity Series is long-term growth of
capital and income consistent with reasonable risk.  The production of current
income is a secondary consideration for Equity Series.  The investment objective
of Income Series is high current income consistent with reasonable risk.
Capital appreciation is a secondary consideration for Income Series.

          Lord Abbett has entered into an agreement with Dunedin Fund Managers
Limited, under which it provides Lord Abbett with advice with respect to that
portion of Global Fund's assets invested in foreign countries.

          Each series currently has outstanding only a single class of shares
and each share has a par value of $.001.  Within each series, all shares have
equal rights as to voting, dividends, assets and liquidation.  There are no
conversion or preemptive rights, and no restrictions on transfer.

          Global Fund has adopted a Rule 12b-1 Plan.  Under the 12b-1 Plan,
Global Fund pays to Lord Abbett (1) an annual service fee (payable quarterly) of
                                 -                                              
..25% of the average daily net asset value of Global Fund's shares sold by
dealers and (2) a one-time 1% sales distribution fee, at the time of sale, on
             -                                                               
all sales over $1 million by dealers on or after June 1, 1990, including sales
qualifying at that level under the rights of accumulation and statement of
intention privileges.  Lord Abbett is required to pay the full amount of the
sales distribution fees to dealers as compensation for selling Global Fund's
shares.
<PAGE>
 
Internal Revenue Service               8                     October 19, 1995


          LORD ABBETT INVESTMENT TRUST ("Investment Trust"), is a diversified,
open-end management investment company organized as a Delaware business trust on
August 16, 1993. Investment Trust is registered as a diversified, open-end
management investment company under the 1940 Act.  A copy of the fund's most
recent Post-Effective Amendment to its Registration Statement on Form N-1A,
dated June 15, 1995, is attached as Exhibit G.

          Investment Trust is organized as a series fund, currently comprised of
two separate portfolios, LIMITED DURATION U.S. GOVERNMENT SECURITIES SERIES (TIN
13-3731507) and BALANCED SERIES (TIN 13-3799450).  Each series qualifies as a
regulated investment company under Subchapter M of the Internal Revenue Code.
Each series' taxable year ends on October 31.  The investment objective of
Limited Duration U.S. Government Securities Series is to seek a high income from
a portfolio consisting primarily of limited duration U.S. government securities.
The investment objective of Balanced Series is to seek current income and
capital growth.

          Each series currently has outstanding only a single class of shares.
Each share has no par value. Within each series, all shares have equal rights as
to voting, dividends, assets and liquidation.  There are no conversion or
preemptive rights, and no restrictions on transfer.

          Investment Trust has adopted a Rule 12b-1 Plan. Under the 12b-1 Plan,
Investment Trust pays Lord Abbett (1) an annual service fee (payable quarterly)
                                   -                                           
of .25% of the average daily net asset value of the series' shares sold by
dealers from the commencement of the series' public offering and (2) with
                                                                  -      
respect to sales at the breakpoint of $1 million or more, a one-time 1%, .50% or
..25% distribution fee, with respect to sales at the time of sale, on shares sold
at net asset value of $1 million but less than $3 million, $3 million but less
than $10 million or $10 million or more, respectively.  Sales qualifying at such
levels in clause (2) under rights of accumulation and statement of intention
privileges are included.  Lord Abbett is required to pay the sales distribution
fee to dealers as compensation for selling Investment Trust's shares.
<PAGE>
 
Internal Revenue Service               9                     October 19, 1995



          LORD ABBETT RESEARCH FUND, INC. ("Research Fund") is a diversified,
open-end management investment company incorporated under the laws of Maryland
on April 6, 1992. Research Fund is registered as a diversified, open-end
management investment company under the 1940 Act.  A copy of Research Fund's
most recent Post-Effective Amendment to Registration Statement on Form N-1A,
dated April 1, 1995, is attached as Exhibit H.

          Research Fund is organized as a series fund, currently comprised of
two separate portfolios, SERIES 1 (TIN 13-6995863), and LORD ABBETT MID CAP
RESEARCH FUND (TIN 13-3842507).  Each series qualifies as a regulated investment
company under Subchapter M of the Internal Revenue Code.  Each series' taxable
year ends on November 30.  The investment objective of Series 1 is growth of
capital and growth of income consistent with reasonable risk.  Production of
current income is a secondary consideration.  The investment objective of Lord
Abbett Mid Cap Research Fund is to seek capital appreciation through investments
primarily in equity securities which are believed to be undervalued in the
marketplace.

          Each series currently has outstanding only a single class of shares,
$.001 par value.  Within each series, all shares have equal voting rights and
equal rights with respect to dividends, assets, and liquidation.  They are fully
paid and nonassessable when issued and have no preemptive or conversion rights.
There are no restrictions on transfer.

          Research Fund has not adopted a Rule 12b-1 Plan.

          LORD ABBETT TAX-FREE INCOME FUND, INC. (the "Tax-Free Fund") is an
open-end management investment company incorporated under the laws of Maryland
on December 27, 1983.  Tax-Free Fund is registered as an open-end management
investment company under the 1940 Act.  A copy of the fund's most recent Post-
Effective Amendment to its Registration Statement on Form N-1A, dated June 15,
1995, is attached as Exhibit I.

          Tax-Free Fund is organized as a series fund, currently comprised of
nine separate portfolios, NATIONAL SERIES (TIN 13-3397836), CONNECTICUT SERIES
(TIN 13-
<PAGE>
 
Internal Revenue Service               10                    October 19, 1995



3608057), HAWAII SERIES (TIN 13-3635800), MINNESOTA SERIES (TIN 13-
3799448), MISSOURI SERIES (TIN 13-3616715), NEW JERSEY SERIES (TIN 13-3603812),
NEW YORK SERIES (TIN 13-3386492), TEXAS SERIES (TIN 13-3386494) and WASHINGTON
SERIES (TIN 13-3664187).  National Series is diversified under the 1940 Act;
each of the other series is nondiversified.  All of the series have met and
intend to continue to meet the diversification rules under Subchapter M of the
Internal Revenue Code.  Each series' taxable year ends on September 30.  The
investment objective for each series is to seek as high a level of interest
income exempt from federal income tax as is consistent with preservation of
capital by investing in municipal bonds.  Except for National, Texas and
Washington Series, each series also seeks as high a level of interest income
exempt from its state's personal income tax and, in the case of New York Series,
from New York City personal income tax, as is consistent with preservation of
capital.

          Each series currently has outstanding only a single class of shares.
Each share has a par value of $.001 and has one vote.  There are no liquidation,
conversion or preemptive rights, and no restrictions on transfer.

          Each series has adopted a Rule 12b-1 Plan. National, New York and
Texas Series have each adopted a 12b-1 Plan under which each series pays Lord
Abbett (1) an annual fee for services (payable quarterly) of .15% of the average
        -                                                                       
daily net asset value of each series' shares sold by dealers prior to June 1,
1990 and .25% of the average daily net asset value of shares sold by dealers on
or after that date, and (2) a one-time 1% sales distribution fee, at the time of
                         -                                                      
sale, on all sales over $1 million by dealers, including sales qualifying at
such level under the rights of accumulation and statement of intention
privileges.  Lord Abbett is required to pay the sales distribution fee to
dealers as compensation for selling Tax-Free Fund's shares.

          Separate 12b-1 Plans have been adopted by each of Connecticut, Hawaii,
Minnesota, Missouri, New Jersey and Washington Series.  Each 12b-1 Plan has
become effective except for Washington and Minnesota Series which will go into
effect on the first day of the quarter subsequent to its net assets reaching
$100 million.  Each 12b-1 Plan provides for the payment of the series to Lord
Abbett of
<PAGE>
 
Internal Revenue Service               11                    October 19, 1995



(1) an annual service fee (payable quarterly) of .25% of the average daily net
 -                                                                            
asset value of shares sold by dealers from commencement of the series' public
offering (in the case of Hawaii, Minnesota, New Jersey and Washington Series,
..15% of the average daily net asset value of such shares sold prior to its
effective date and .25% of the average daily net asset value of such shares sold
on or after that date), and (2) a one-time 1% sales distribution fee, at the
                             -                                              
time of sale, on all sales over $1 million by dealers on or after the series'
effective date, including sales qualifying at such level under the rights of
accumulation and statement of intention privileges.

          LORD ABBETT TAX-FREE INCOME TRUST ("Tax-Free Trust") is an open-end
non-diversified management investment company organized as a Massachusetts
business trust on September 11, 1991.  Tax-Free Trust is registered as an open-
end management investment company under the 1940 Act. A copy of Tax-Free Trust's
most recent Post-Effective Amendment to its Registration Statement on Form N-1A,
dated June 15, 1995, is attached as Exhibit J.

          Tax-Free Trust is organized as a series fund, currently comprised of
four separate portfolios, FLORIDA SERIES (TIN 13-3633027), GEORGIA SERIES (TIN
13-3799446), PENNSYLVANIA SERIES (TIN 13-3646755) and MICHIGAN SERIES (TIN 13-
3692073).  Each of the four series, although non diversified under the 1940 Act,
meets the diversification rules of and qualifies as a regulated investment
company under Subchapter M of the Internal Revenue Code.  Each series' taxable
year ends on October 31.  The investment objective of each series is to seek as
high a level of interest income exempt from federal income tax and its
respective state's personal income tax, if any, as is consistent with
preservation of capital by investing primarily in a diversified portfolio of
municipal bonds.

          Each series currently has outstanding only a single class of shares.
Each share has no par value. Within each series, all shares have equal voting
rights and equal rights with respect to dividends, assets, and liquidation.
There are no conversion or preemptive rights, and no restrictions on transfer.
<PAGE>
 
Internal Revenue Service               12                    October 19, 1995



          Each series has adopted a Rule 12b-1 Plan.  The 12b-1 Plan fees
indicated below will go into effect on the first day of the calendar quarter
subsequent to the series' net assets reaching $100 million.  Under the 12b-1
Plan the series will pay Lord Abbett (1) an annual service fee (payable
                                      -                                
quarterly) of .25% of the average daily net asset value of the series' shares
sold by dealers on or after the 12b-1 Plans' effective date and .15% of the
average daily net asset value of shares sold by dealers prior to that date and
(2) a one-time 1% sales distribution fee, at the time of sale, on all sales over
 -                                                                              
$1 million by dealers, on or after the series' effective date, including sales
qualifying at such level under the rights of accumulation and statement of
intention privileges.  Lord Abbett is required to pay the sales distribution fee
to dealers as compensation for selling Tax-Free Trust's shares.

          LORD ABBETT U.S. GOVERNMENT SECURITIES FUND, INC. (TIN 13-6020601)
("Government Fund") is a diversified, open-end management investment company
organized in 1932 and re-incorporated under the laws of Maryland on July 9,
1975. The fund is registered as a diversified, open-end management investment
company under the 1940 Act.  A copy of the fund's most recent Post-Effective
Amendment to its Registration Statement on Form N-1A, dated April 1, 1995, is
attached as Exhibit K.

          Government Fund has a single class of shares, $1.00 par value, with
equal rights as to voting, dividends, assets and liquidation.  There are no
conversion or preemptive rights, and no restrictions on transfer.  Its taxable
year ends on November 30.  The investment objective of Government Fund is high
current income with relatively low risk of price decline.  This objective is
sought by investing primarily in U.S. government securities.

          Government Fund has adopted a Rule 12b-1 Plan. Under the 12b-1 Plan,
Government Fund pays Lord Abbett (1) an annual service fee (payable quarterly)
                                  -                                           
of .25% of the average daily net asset value of Government Fund's shares
attributable to sales by dealers on or after September 1, 1985 and .15% of the
average daily net asset value of shares sold by dealers prior to that date and
(2) a one-time 1% sales distribution fee, at the time of sale, on all sales over
 -                                                                              
$1 million by dealers, including sales qualifying at
<PAGE>
 
Internal Revenue Service               13                    October 19, 1995



such level under the rights of accumulation and statement of intention
privileges.  Lord Abbett is required to pay the sales distribution fee to
dealers as compensation for selling Government Fund's shares.

          LORD ABBETT U.S. GOVERNMENT SECURITIES MONEY MARKET FUND, INC. (TIN
13-2986729) ("Money Market Fund") is a diversified, open-end management
investment company incorporated under the laws of Maryland on May 9, 1979. Money
Market Fund is registered as a diversified, open-end management investment
company under the 1940 Act.  A copy of Money Market Fund's most recent
Registration Statement on Form N-1A, dated November 1, 1994, is attached as
Exhibit L.

          Money Market Fund has a single class of shares, $.001 par value, with
equal rights as to voting, dividends, assets and liquidation.  There are no
conversion or preemptive rights, and no restrictions on transfer.  Money Market
Fund qualifies as a regulated investment company under Subchapter M of the
Internal Revenue Code.  Its taxable year ends on June 30.  The investment
objective of Money Market Fund is to provide high current income and
preservation of capital through investments in high-quality, short-term liquid
securities.  The Money Market Fund seeks to obtain its objective by investing at
least 65% of its total assets in obligations issued or backed by the U.S.
Government or its agencies or instrumentalities.

          Money Market Fund has adopted a Rule 12b-1 Plan. However, payment of
the 12b-1 Plan fees has been waived since July 1, 1992.  Under the 12b-1 Plan,
Money Market Fund would pay Lord Abbett, which would pass on to dealers, an
annual service fee (payable quarterly) of .15% of the average daily net asset
value of Money Market Fund's shares sold by dealers.

          LORD ABBETT VALUE APPRECIATION FUND, INC. (TIN 13-3166900) ("Value
Fund"), is a diversified, open-end management investment company incorporated
under the laws of Maryland on March 14, 1983.  Value Fund is registered as a
diversified, open-end management investment company under the 1940 Act.  A copy
of Value Fund's most recent Post-Effective Amendment to its Registration
Statement on Form N-1A, dated May 1, 1995, is attached as Exhibit M.
<PAGE>
 
Internal Revenue Service               14                    October 19, 1995



          Value Fund has a single class of shares, $.10 par value, with equal
rights as to voting, dividends, assets and liquidation.  They are fully paid and
nonassessable when issued and have no preemptive or conversion rights.  There
are no restrictions on transfer.  Value Fund qualifies as a regulated investment
company under Subchapter M of the Internal Revenue Code.  Its taxable year ends
on December 31.  The investment objective of Value Fund is to seek capital
appreciation through investments, primarily in equity securities, which are
believed to be undervalued in the marketplace.

          Value Fund has adopted a Rule 12b-1 Plan. Under the 12b-1 Plan, Value
Fund pays to Lord Abbett, which passes on to dealers, (1) an annual service fee
(payable quarterly) of .25% of the average daily net asset value of Value Fund's
shares attributable to sales by dealers on or after June 1, 1990 and .15% of the
average daily net asset value of shares sold by dealers prior to that date and
(2) a one-time 1% sales distribution fee, at the time of sale, on all sales over
$1 million by dealers, including sales qualifying at such level under the rights
of accumulation and statement of intention privileges.  Lord Abbett is required
to pay the full amount of the sales distribution fees to dealers as compensation
for selling Value Fund's shares.
<PAGE>
 
Internal Revenue Service               15                    October 19, 1995



PROPOSED TRANSACTIONS
- - ---------------------

          Management of the Lord Abbett Funds/2/ has proposed that the Articles
of Incorporation or Declaration of Trust of each Fund be amended to permit each
to issue additional, separate classes of shares with characteristics designed
for particular markets.  A draft of the proxy materials soliciting the approval
of each Fund's shareholders for the amendment to the Articles of Incorporation
or Declaration of Trust permitting the issuance of separate classes (including
the text of the proposed amendment), will be submitted when it is filed with the
Securities and Exchange Commission./3/

          Subject to the shareholders' approval of the amendments, the Board of
Directors of each Fund will redesignate its currently outstanding shares as a
separate class and will authorize the issuance of additional separate classes of
shares of each series ("Additional Classes").

          The precise terms of each Additional Class will be determined by the
Board of Directors of each Fund at the time of issuance.  However, each Fund
represents that, although the Additional Classes may be sold under different
sales arrangements, the shares of the Additional Classes offered by each Fund
will otherwise be identical to the currently outstanding shares of that Fund,
with the following exceptions:

          (i) A 12b-1 Fee equal to a percentage of average daily net asset-value
     may or may not be charged under a 12b-1 Plan to each of the Additional
     Classes, and the level of 12b-1 Fees may vary from class to class. The

- - --------------------
2.   As used herein, the term "Fund" refers to each taxpayer designated on
     Schedule A, regardless of whether the entity is structured as a separate
     corporation or trust or as a series of a corporation or trust.

3.   No shareholder vote is required for Tax-Free Trust. A copy of its proposed
     amendment will be submitted with the other amendments. No amendment is
     required for Investment Trust.
<PAGE>
 
Internal Revenue Service               16                    October 19, 1995



     Additional Classes may bear different service and distribution fees under
     12b-1 Plans, may bear different costs relating to shareholder or director
     (trustee) approval of or amendments to 12b-1 Plans or may have front end
     loads or other sales charges or non-12b-1 shareholder service plan fees
     (collectively, "Plan Payments"). Services provided pursuant to 12b-1 Plans
     or non-12b-1 shareholder service plans may include (1) preparing,
     producing, and delivering printed materials to shareholders, including
     reports, prospectuses and proxies, (2) advertising, and (3) promoting and
     selling shares. Such services may also include certain administrative
     services associated with (1) maintaining and processing customer accounts
     and records, such as data maintenance and communication, and systems
     servicing; (2) handling shareholder inquiries and communications, including
     postage and shipping charges; (3) recordkeeping and shareholder accounting,
     including related storage and shipping; (4) shareholder servicing; and (5)
     processing dividend payments on behalf of customers.

          (ii) Each class will bear different "Specially Allocated Expenses,"
           --
     which are Fund expenses and fees (other than Plan Payments) allocated to
     that class and not allocated on a pro rata basis across different classes.
     These may include registration fees under state Blue Sky laws; SEC
     registration fees; accounting expenses; auditors fees, litigation expenses
     and legal fees and expenses relating to a class; and expenses incurred in
     connection with shareholder or director (trustee) meetings as a result of
     issues relating to a class.

          Specially Allocated Expenses may also include other expenses related
     solely to a particular class of shareholders and administrative expenses
     required to support shareholders of that class, to the extent that such
     expenses are incidental to the class expenses specifically enumerated in
     the paragraph above.

          The taxpayer represents that the only expenses allocated to the
     classes disproportionately will be Specially Allocated Expenses and Plan
     Payments. The Specially Allocated Expenses allocated to each share of
<PAGE>
 
Internal Revenue Service               17                    October 19, 1995



     a class during a year will differ from the Specially Allocated Expenses
     allocated to each share of any other class of the same Fund by less than 50
     basis points of the average daily net asset value of the class of shares of
     such Fund with the smallest average net asset value.

          Any distribution on shares of a class will differ from the
     distribution on shares of other classes of the same Fund only as a result
     of the allocation of Specially Allocated Expenses and Plan Payments and the
     effects of such allocation.

          (iii)  The designation of each class of shares of a Fund will be 
           ---
     different.

          (iv)  The effect of the sales charges for each class will differ.
           --                                           

          (v)  Voting rights on matters affecting only one class will vary in
           -                                                                 
     accordance with the procedures set forth in Rule 12b-1 and Rule 18f-3.

          (vi)  Different classes of shares may have different conversion 
           --                                       
     features.

          (vii)  Each class may have different privileges of reinvestment with a
           ---                                                                  
     reduced sales load after redemption, as will be specified from time to time
     in the relevant prospectus disclosure.

          (viii)  Different classes of shares may have different exchange 
     privileges.

          Dividends paid by each Fund with respect to various classes of shares
will be calculated in the same manner and at the same time on the same day.
Amounts payable as dividends, however, will vary because of the differing
amounts of Specially Allocated Expenses and Plan Payments borne exclusively by a
particular class.

          The net asset value per share and net income per share of a particular
class will also vary owing to the differing amounts of Specially Allocated
Expenses and Plan Payments.  Because gross income and other expenses would be
<PAGE>
 
Internal Revenue Service               18                    October 19, 1995



allocated daily to a class based on its net asset value, more income would be
allocated per share to classes with lower per share class expenses than to
classes with higher per share expenses.  Further, this net income differential
would tend to increase during the course of the dividend period until the
accumulated income is declared as a dividend at the close of the period.

          On each day that it determines net asset value per share each Fund
will first allocate its gross investment income less expenses other than
Specially Allocated Expenses or Plan Payments among all shares of that Fund
regardless of class in accordance with net asset values determined as of the
preceding day.  Specially Allocated Expenses and Plan Payments allocated to a
particular class will then be subtracted from the amounts otherwise allocable to
that class, to determine the net asset value of the shares of each class.

                               RULINGS REQUESTED
                               -----------------

          We respectfully request that you rule that:

     1.   The adoption of the proposed multiple class system will not cause
          dividends declared and paid by any of the Funds to be preferential
          dividends within the meaning of section 562(c) of the Code and each
          Fund will therefore be eligible for the dividends paid deduction under
          sections 561 and 852 of the Code, provided that each Fund otherwise
          continues to meet the criteria of those two sections.

     2.   The creation of multiple classes of shares within each Fund will not
          affect the classification of each Fund as a regulated investment
          company under section 851(a) or (h).

     3.   There will be no federal income tax consequences to the holders of
          currently outstanding shares of any Fund as a result of the
          reclassification of the shares held by such holders as a separate
          class of each Fund.
<PAGE>
 
Internal Revenue Service               19                    October 19, 1995



                                  DISCUSSION
                                  ----------

          Each share of each Additional Class that will be offered by each Fund
will represent an equal interest in the same portfolio of investments and
(except as specified in paragraphs (i) through (viii) above) will have voting,
dividend, and liquidation rights that are identical to those of the currently
outstanding shares of that Fund.  Each class of new shares may be subject to its
own 12b-1 Fees, non-12b-1 shareholder service plan fees or other Plan Payments
and some of the classes may be subject to different levels of Plan Payments.
Although Specially Allocated Expenses will be allocated differently between the
classes, each Fund has represented that the Specially Allocated Expenses
allocated to each share of a class during a year will differ from Specially
Allocated Expenses allocated to each share of any other class of the same Fund
by less than 0.50% of the average net asset value per share of the class with
the smallest net asset value per share.

          The facts and representations presented above are similar to those
described in Private Letter Ruling 9522045 (March 7, 1995), Private Letter
Ruling 9422026 (March 1, 1994) and numerous other rulings.

          In those rulings, the Service has stated that for purposes of section
562(c) of the Code, sales loads, 12b-1 Fees and other Plan Payments are
essentially treated as direct and indirect shareholder expenses that should not
be taken into account in determining whether distributions are preferential.
Cf., Treas. Reg. (S) 1.67-2T(k), Examples 3 and 4.  As a result, amounts
- - --                                                                      
distributed with respect to different classes of shares of each Fund will
effectively differ only as a result of the Specially Allocated Expenses, which
will be limited as described in paragraph (ii) above. As noted in the prior
rulings, section 562(c) treats as pro rata those distributions that differ by a
de minimis amount because of the allocation of fund expenses.  H.R. Rep. No.
1860, 75th Cong., 3d Sess. 23 (1938).  Accordingly, dividends paid by each Fund
after the adoption of the multiple class system will not be preferential within
the meaning of section 562(c) of the Code.

          Moreover, the Service has found in the prior rulings that differences
in class-designations, voting
<PAGE>
 
Internal Revenue Service               20                    October 19, 1995



rights, sales charges and class-specific expenses, like those described above,
are insufficient to cause the shares to be classified as different classes for
purposes of the Code.  As a result, the designation of outstanding shares as
belonging to a particular class should have no tax effect.

          As a result, the adoption of the multiple class system as described
above should have no effect on the qualification of each Fund as a regulated
investment company under sections 851 and 852 of the Code.

                             PROCEDURAL STATEMENTS
                             ---------------------

          To the best of the knowledge of each Fund and its representative,
issues identical to those involved in this ruling request are not raised in an
earlier return of any Fund (or in a return for any year of a related taxpayer
within the meaning of section 267 of the Code, or of a member of an affiliated
group of which any Fund is also a member within the meaning of section 1504).

          To the best of the knowledge of each Fund and its representative, the
Service has not previously ruled on issues identical or similar to those raised
in this ruling request for any Fund (or a related taxpayer within the meaning of
section 267 of the Code, or a member of an affiliated group within the meaning
of section 1504) or a predecessor, nor has any Fund, a related taxpayer, a
predecessor, or their representatives previously submitted the same or similar
issues to the Service but withdrawn them before a letter ruling or determination
letter was issued.

          To the best of the knowledge of each Fund and its representative, the
taxpayer, a related taxpayer, or a predecessor has not previously submitted a
request involving the same or a similar issue that is currently pending with the
Service, nor is the taxpayer or a related taxpayer presently submitting another
request involving the same or similar issues to the Service at the same time as
this request.

          Each Fund believes that the law in connection with this ruling request
is unclear and that the issues raised herein are not adequately addressed by the
relevant authorities.
<PAGE>
 
Internal Revenue Service               21                    October 19, 1995



          No Fund is aware of any pending legislation which may affect the
proposed transactions nor is any Fund aware of any authorities contrary to the
positions advanced herein.

          The declarations required by section 601.201(e)(1) of the Regulations,
signed by an officer of each Fund on behalf of that Fund, who has personal
knowledge of the material facts, is enclosed.

          If any additional information is desired, please call Seth L. Rosen of
Debevoise & Plimpton ((212) 909-6373). Enclosed herewith are powers of attorney
authorizing Mr. Rosen and Jonathan A. Small of this firm to represent each Fund
in this matter.  If for any reason the rulings request ed cannot be issued on
the basis of the information con tained herein, together with any additional
information, we hereby request a conference.

          Your ruling letter should be addressed to each Fund, with a copy to 
the undersigned.

          We request that an advance copy of the letter ruling be issued by
facsimile pursuant to section 8.02(5) of Revenue Procedure 95-1, 1995-1 I.R.B.
9.  The facsimile copy should be sent to Seth L. Rosen, c/o Debevoise &
Plimpton, at (212) 909-6836.  The Funds hereby waive any disclosure violations
which may result from the facsimile transmission, but ask that you take certain
precautions to protect confidential information in accordance with section
8.02(5) of Revenue Procedure 95-1.

          A check in the amount of $7475 is enclosed as the user fee specified
in section 14.02 and Appendix A of Reve nue Procedure 95-1.

                              Respectfully submitted,



                              Seth L. Rosen

Enclosures
<PAGE>
 
                                  SCHEDULE A
                                  ----------
<TABLE>
<CAPTION>
Fund                                                        T.I.N.
- - ----                                                        ------
<S>                                                         <C>
                                                        
Affiliated Fund, Inc.                                       13-6020600
Lord Abbett Bond-Debenture Fund, Inc.                       13-2669319
Lord Abbett California Tax-Free                         
 Income Fund, Inc.                                          13-3271131
Lord Abbett Developing Growth Fund, Inc.                    13-2755091
Lord Abbett Fundamental Value Fund, Inc.                    13-3342841
Lord Abbett Global Fund, Inc.                           
         -- Equity Series                                   13-3460109
         -- Income Series                                   13-3460111
Lord Abbett Investment Trust                            
         -- Limited Duration U.S. Government            
             Securities Series                              13-3731507
         -- Balanced Series                                 13-3799450
Lord Abbett Research Fund, Inc.                         
         -- Series 1                                        13-6995863
         -- Lord Abbett Mid Cap Research Fund               13-3842507
Lord Abbett Tax-Free Income Fund, Inc.                  
         -- National Series                                 13-3397836
         -- Connecticut Series                              13-3608057
         -- Hawaii Series                                   13-3635800
         -- Minnesota Series                                13-3799448
         -- Missouri Series                                 13-3616715
         -- New Jersey Series                               13-3603812
         -- New York Series                                 13-3386492
         -- Texas Series                                    13-3386494
         -- Washington Series                               13-3664187
Lord Abbett Tax-Free Income Trust                       
         -- Florida Series                                  13-3633027
         -- Georgia Series                                  13-3799446
         -- Pennsylvania Series                             13-3646755
         -- Michigan Series                                 13-3692073
Lord Abbett U.S. Government Securities                  
 Fund, Inc.                                                 13-6020601
Lord Abbett U.S. Government Securities                  
 Money Market Fund, Inc.                                    13-2986729
Lord Abbett Value Appreciation Fund, Inc.                   13-3166900
</TABLE>
<PAGE>
 
INTERNAL REVENUE SERVICE          DEPARTMENT OF THE TREASURY
                                  WASHINGTON, DC 20024

U.I.L. Nos.:  0561.05-00, 0562.03-02
              0851.00-00, 0852.00-01
 
 
                                Person to Contact:
                                Susan T. Baker
Seth Rosen                      Telephone Number:
Debevoise & Plimpton            (202) 622-3940
875 Third Avenue                Refer Reply to:
New York, NY  10022             CC:DOM:FI&P:2  TR-31-2399-95
                                Date:
 
Legend:

State A = Maryland

State B = Delaware

State C = Massachusetts

Investment Manager and Distributor = Lord, Abbett & Company

Fund 1 = Affiliated Fund, Inc.
         EIN:  13-6020600

Fund 2 = Lord Abbett Bond-Debenture Fund, Inc.
         EIN:  13-2669319
         TR-31-2400-95

Fund 3 = Lord Abbett California Tax-Free Income Fund, Inc. 
         EIN: 13-3271131
         TR-31-2401-95

Fund 4 = Lord Abbett Developing Growth Fund, Inc.
         EIN:  13-2755091
         TR-31-2402-95

Fund 5 = Lord Abbett Fundamental Value Fund, Inc.
         EIN:  13-3342841
         TR-31-2403-95
                                       1
<PAGE>
 
Fund 6 = Lord Abbett Global Fund, Inc.--Equity Series
         EIN:  13-3460109
         TR-31-2404-95

Fund 7 = Lord Abbett Global Fund, Inc.--Income Series
         EIN:  13-3460111
         TR-31-2405-95

Fund 8  = Lord Abbett Investment Trust--Limited Duration U.S. Government
          Securities Series
          EIN:  13-3731507
          TR-31-2406-95

Fund 9  = Lord Abbett Investment Trust--Balanced Series
          EIN:  13-3799450
          TR-31-2410-95

Fund 10 = Lord Abbett Research Fund, Inc.--Series I
          EIN:  13-6995863
          TR-31-2411-95

Fund 11 = Lord Abbett Research Fund, Inc.--Lord Abbett Mid Cap Research Fund
          EIN:  13-3842507
          TR-31-2412-95

Fund 12 = Lord Abbett Tax-Free Income Fund, Inc.--National Series
          EIN:  13-3397836
          TR-31-2415-95

Fund 13 = Lord Abbett Tax-Free Income Fund, Inc.--Connecticut Series
          EIN:  13-3608057
          TR-31-2417-95

Fund 14 = Lord Abbett Tax-Free Income Fund, Inc.--Hawaii Series
          EIN:  13-3635800
          TR-31-2419-95

Fund 15 = Lord Abbett Tax-Free Income Fund, Inc.--Minnesota Series
          EIN:  13-3799448
          TR-31-2420-95
                                       2
<PAGE>
 
Fund 16 = Lord Abbett Tax-Free Income Fund, Inc.--Missouri Series
          EIN:  13-3616715
          TR-31-2425-95

Fund 17 = Lord Abbett Tax-Free Income Fund, Inc.--New Jersey Series
          EIN:  13-3603812
          TR-31-2426-95

Fund 18 = Lord Abbett Tax-Free Income Fund, Inc.--New York Series
          EIN:  13-3386492
          TR-31-2427-95

Fund 19 = Lord Abbett Tax-Free Income Fund, Inc.--Texas Series
          EIN:  13-3386494
          TR-31-2428-95

Fund 20 = Lord Abbett Tax-Free Income Fund, Inc.--Washington Series
          EIN:  13-3664187
          TR-31-2429-95

Fund 21 = Lord Abbett Tax-Free Income Trust--Florida Series
          EIN:  13-3633027
          TR-31-2430-95

Fund 22 = Lord Abbett Tax-Free Income Trust--Georgia Series
          EIN:  13-3799446
          TR-31-2431-95

Fund 23 = Lord Abbett Tax-Free Income Trust--Pennsylvania Series
          EIN:  13-3646755
          TR-31-2432-95

Fund 24 = Lord Abbett Tax-Free Income Trust--Michigan Series
          EIN:  13-3692073
          TR-31-2433-95

Fund 25 = Lord Abbett U.S. Government Securities Money Market Fund, Inc.
          EIN:  13-2986729
          TR-31-2435-95
                                       3
<PAGE>
 
Fund 26 = Lord Abbett U.S. Government Securities Fund, Inc.
          EIN:  13-6020601
          TR-31-2435-95

Fund 27 = Lord Abbett Value Appreciation Fund, Inc.
          EIN:  13-3166900
          TR-31-2436-95

Fund 28 = Lord Abbett Securities Trust--Growth and Income Trust
          EIN:  13-3731505
          TR-31-268-96

Fund 29 = Lord Abbett Research Fund, Inc.--Small-Cap Series
          EIN:  13-3862601
          TR-31-269-96

a = .50
- - --

Dear Mr. Rosen:

       This ruling replies to your letters dated October 19, 1995, and January
26, 1996, submitted on behalf of Funds I through 29, in which you request that
the Internal Revenue Service rule as follows:

  (1)  that the adoption of the proposed multiple class system will not cause
dividends paid on each class of shares issued by the funds to be preferential
dividends under section 562(c) of the Code, and therefore that each fund will
be eligible for the dividends-paid deduction under sections 561 and 852(b)(2)(D)
of the Code;

  (2)  that the creation of multiple classes of shares will not affect the
classification of the Funds as regulated investment companies (RICs) under
section 851 of the Code; and

  (3)  that the redesignation of currently outstanding shares of each fund as a
separate class of shares pursuant to the proposed multiple class system will not
result in gain or loss or in other Federal income tax consequences to the
holders of currently outstanding shares.
                                       4
<PAGE>
 
  FACTS

       Funds are open-end management investment companies registered under the
Investment Company Act of 1940, 15 U.S.C. 80a-1 et seq., as amended (the 1940
                                                -- ---                       
Act) , and are structured as corporations, as trusts, or as series of
corporations or trusts. Each qualified as a regulated investment company (RIC)
under Subchapter M, part 1, of the Code. Funds 1 through 7, 10 through 20, and
25 through 27 are incorporated under the laws of State A. Funds 6 and 7, Funds
10, 11, and 29, and Funds 12 through 20 are organized as series funds under the
laws of State A. Funds 8 and 9 are organized as business trusts under the laws
of State B. Funds 21 through 24 are organized as a series fund under the laws of
State C. Fund 28 is organized as a series fund under the laws of State B.

       Investment Advisor and Distributor provides investment advice for each
of the funds.  The shares of the funds, with the exception of shares of Funds 10
and 11, are marketed pursuant to distribution agreement with Investment Advisor
and Distributor.

       Shares of the funds are sold subject to differing sales arrangements.
Under Rule 12b-1 plans adopted by certain of the funds, an annual service fee
equal to a percentage of the average daily net asset value of shares of the fund
is payable to Investment Advisor and Distributor. The level of the annual
service fee varies from fund to fund.  Also payable to Investment Advisor and
Distributor under the Rule 12b-1 plans are one-time sales distribution fees,
payable at the time of sale, on sales of greater than certain specified amounts.
Investment Advisor and Distributor is required to pay the sales distribution
fees to dealers as compensation for selling shares of the funds.

       Funds each have outstanding only a single class of shares.  Funds have
proposed that the articles of incorporation or declaration of trust of each
fund be amended to permit each to issue additional, separate classes of shares
with characteristics designed for particular markets.

       The precise terms of each additional class will be determined by the
Board of Directors of each fund at the time of issuance.  Each fund represents,
however, that although the additional classes may be sold under differing sales
arrangements the shares of the additional classes offered by each fund will
otherwise be identical to outstanding shares of that fund, with the following
exceptions:
                                       5
<PAGE>
 
  (1)  The designation of each class of shares will be different.

  (2)  Different classes of shares may have different conversion features.

  (3)  Different classes may have different exchange privileges.

  (4)  Each class may have different privileges of reinvestment with a reduced
sales load after redemption.

  (5)  The additional classes may adopt Rule 12b-1 plans which bear different
service and distribution fees or different costs relating to approval of or
amendments to the Rule 12b-1 plans.  The level of Rule 12b-1 plan fees may vary
from class to class.  Voting rights on matters affecting only one class will
vary in accordance with the procedures set forth in Rule 12b-1 and Rule 18f-3.

  (6)  The additional classes may be sold subject to asset-based sales charges
and the effect of the sales charges for each class will differ.

  (7)  The additional classes may be sold subject to non-Rule 12b-1 plan
shareholder services plan fees.

  (8)  Each class will bear different specially allocated expenses.  To the
extent the following classes of expenses can reasonably be identified as
relating to a particular class, they will be allocated to that class and, if so
allocated, will be referred to as Class Expenses:

            (a)  registration fees under state Blue Sky laws;
            (b)  SEC registration fees;
            (c)  accounting expenses, including auditors' fees;
            (d)  legal fees, including expenses of litigation;
            (e)  expenses incurred in connection with shareholder, director, or
        trustee meetings; and
            (f)  administrative expenses required to support shareholders of a
        particular class, to the

                                       6
<PAGE>
 
       extent incidental to the expenses enumerated in (a) through (e).

       The funds represent that the only expenses allocated to the classes
disproportionately are Class Expenses, Rule 12b-1 plan fees and shareholder
services plan fees. The Class Expenses allocated to each share of a class during
a year will differ from the Class Expenses allocated to each share of any other
class of the same fund by less than a% of the average daily net asset value of
                                    -                                         
the class of shares with the smallest average net asset value.

       Any distribution on shares of a class will differ from the distribution
on shares of other classes of the same fund only as a result of the allocation
of Class Expenses, Rule 12b-1 plan fees and shareholder services plan fees and
the effects of such allocation.

       Investment Advisor and Distributor may waive a Rule 12b-1 plan fee in
whole or in part.

       Dividends paid by each fund with respect to various classes of shares
will be calculated in the same manner and at the same time on the same day.
Amounts payable as dividends, however, will vary because of the differing
amounts of Class Expenses, Rule 12b-1 plan fees, and shareholder services plan
fees borne exclusively by a particular class.

                                      LAW

       Section 851(a) defines a RIC, in part, as a domestic corporation
registered under the 1940 Act as a management company.

       Section 851(b) limits the definition of a RIC to a corporation meeting
certain election, gross income, and diversification requirements.

       Section 851(h) of the Code provides a special rule for a RIC having more
than one fund.  This provision treats each fund as a separate corporation for
all purposes of the Code, other than the definitional requirement of section
851(a).

       A corporation that is a RIC within the meaning of section 851 and that is
taxable under Subchapter M, part I, pays tax on its investment company taxable
income under section 852(b)(2) and on the excess, if any, of its net

                                       7
<PAGE>
 
capital gain over its deduction for dividends paid, determined with reference
to capital gains dividends only under section 852(b)(3).

       Section 852 provides that a RIC is not taxable under Subchapter M, part
I, unless its deduction for dividends paid (as that term is defined in section
561(a) with certain modifications) for the taxable year equals or exceeds a
specified portion of its taxable income (with certain adjustments) and its net
tax-exempt interest income.

       Section 561(a) defines the deduction for dividends paid, for purposes of
section 852, to include dividends paid during the taxable year.

       Section 562(a) states that the term "dividend", except as otherwise
provided, includes only dividends described in section 316, which provides a
definition of dividends for purposes of corporate distributions.

       Section 316(a) defines the term "dividend" as any distribution of
property made by a corporation to its shareholders (1) out of its earnings and
                                                    -                         
profits (E & P) accumulated after February 28, 1913, or (2) out of its E & P of
                                                         -                     
the taxable year (computed as of the close of the taxable year without
diminution by reason of any distributions made during the taxable year), without
regard to the amount of the E & P at the time the distribution was made.

       Section 562(c) provides that the amount of any distribution shall not be
considered as a dividend for purposes of the dividends paid deduction under
section 561 unless the distribution is pro rata, does not prefer any shares of
stock of a class over other shares of stock of that same class, and does not
prefer one class of stock over another class except to the extent the former
class is entitled (without reference to waivers of their rights by shareholders)
to be preferred.

       The legislative history and regulations show that each shareholder within
a class, as that term is used in section 562(c), has certain inherent rights.
                                                                              
The Revenue Act of 1936: Hearings on H.R. 12395 Before the Senate Comm. on
- - --------------------------------------------------------------------------
Finance, 74th Cong., 2d Sess. 62 (1936); H.R. Rep. No. 1860, 75th Cong., 3d
- - -------                                                                    
Sess. 23 (1938); section 1.562-2 of the Income Tax Regulations.  Each
shareholder within a class has the right to receive the same distribution on
each of his shares belonging to the class as every other shareholder within the
class.  In addition, the class has the right not
                                       8
<PAGE>
 
to receive less than that to which it is entitled when compared to other
classes.

       A class for purposes of section 562(c), therefore, is a group of
shareholders whose rights are so closely aligned and so different from other
shareholders' rights as to warrant a conclusion that members of the group should
all be treated the same and should be protected against the infringement of
shareholders outside the group with respect to distributions.  For example,
section 1.562-2(b), Example (3) of the income Tax Regulations indicates that
cumulative preferred and common stock may form two classes for these purposes.
Among the characteristics that cause cumulative preferred shareholders to be
viewed as a unit separate from common shareholders is their right to certain
preferences on distributions, on redemption, and on liquidation, and their right
to vote to protect those preferences.

                                    ANALYSIS

       In this case, shares proposed under the multiple class distribution
system represent an equal interest in the same fund of investments and will be
identical in all ways, except as follows:

  1.  Each class of shares will have a different designation.

  2.  The amount and type of asset-based sales load, if any, may differ on each
class of shares.

  3.  The amounts assessed to a class as a result of a shareholder servicing
plan may differ.

  4.  The Class Expenses enumerated above will be allocated separately to the
class of shares to which they are attributable.

  5.  Certain classes may adopt Rule 12b-1 plans which bear different service
and distribution fees or different costs relating to approval of or amendments
to the Rule 12b-1 plans.  The level of Rule 12b-1 plan fees may vary from class
to class.  Voting rights on matters affecting only one class will vary in 
accordance with the procedures set forth in Rule 12b-1 and Rule l8f-3.

  6.  Different classes of shares may have different conversion features.

                                       9
<PAGE>
 
  7.  Different classes may have different privileges of reinvestment with a
reduced sales load after redemption.

  8.  Different classes of shares may have different exchange privileges.

       These differences alone are insufficient to cause the shares proposed
under the multiple class distribution system to be treated as different classes
of shares under section 562(c).

       The Rule 12b-1 fee is a fund expense for purposes of computing investment
company taxable income because it is paid by a fund from fund assets, unlike a
front-end sales load, which is viewed as a shareholder cost.  See United States
                                                              --- -------------
v. Cartwright, 411 U.S. 546 (1973), aff'q 457 F.2d 567 (1972), in which the
- - -------------                       -----                                  
Supreme Court describes a front-end sales load as a type of brokerage commission
that is a shareholder cost.  Nonetheless, fees paid pursuant to Rule 12b-1 plans
are akin to front-end sales loads because both amounts are primarily for
distribution expenses.  The Securities and Exchange Commission has described
Rule 12b-1 plan fees as substitutes for front-end sales loads.  See Exemptions
                                                                --- ----------
for Certain Registered Open-End Management Investment Companies to Impose
- - ------------------------------------------ ------------------------------
Deferred Sales Loads, Investment Company Act Release No. 16,619, 53 FR 45,275 at
- - --------------------                                                            
45,277-78 (Nov. 9, 1988) and Payment of Asset-Based Sales Loads by Registered
                         --- ------------------------------------------------
Open-End Management Investment Companies, Investment Company Act Release No.
- - ----------------------------------------                                    
16,431, 53 FR 23,258 at 23,270 (June 21, 1988).  Thus, it appears that fees paid
pursuant to a Rule 12b-1 plan indirectly are shareholder expenses.  A fund is
never out-of-pocket for amounts paid under the Rule 12b-1 plan; it is reimbursed
for these outlays by shareholders participating in the plan.

       Under this analysis, a Rule 12b-1 fee can be considered an indirect
shareholder expense in determining whether distributions are preferential under
section 562(c) of the Code.  Payments made pursuant to shareholder servicing
agreements also must be considered in determining whether a fund's distributions
are preferential.

       When the Rule 12b-1 plan fees and fees payable under shareholder
servicing agreements are taken into account, the amounts distributed on the
shares of a fund differ by less than a%, which is de minimis.  Section 562(c) of
                                     -                                          
the Code treats as pro rata those distributions that

                                      10
<PAGE>
 
differ by a de minimis amount.  H.R. Rep. No. 1860, 75th Cong., 3d Sess. 23
(1938).

       We conclude from this analysis that each fund has only a single class of
stock.  The differences specified above are insufficient to cause the shares to
be classified as different classes under section 562(c) of the Code.  The rights
of all shareholders are so closely aligned and similar as to mandate that all
shareholders, who will have the benefit of the same economic distributions,
should be treated as a single class and that the conversion of shares within
that single class will have no tax affect.

                                    HOLDINGS

       Based on the facts as represented by the funds, and provided that each
fund otherwise meets the criteria of sections 561(a) and 852, we rule as
follows:

  (1)  that the adoption of the proposed multiple class system will not cause
dividends paid on each class of shares issued by the funds to be preferential
dividends under section 562(c) of the Code, and therefore that each fund will
be eligible for the dividends-paid deduction under sections 561 and 852(b)(2)(D)
of the Code,

  (2)  that the creation of multiple classes of shares will not affect the
classification of the Funds as regulated investment companies (RICs) under
section 851 of the Code,

and

  (3)  that the redesignation of currently outstanding shares of each fund as a
separate class of shares pursuant to the proposed multiple class system will not
result in gain or loss or in other Federal income tax consequences to the
holders of currently outstanding shares.

       Except as specifically ruled upon above, no opinion is expressed or
implied regarding the Federal tax aspects of this transaction.  We express no
opinion as to whether each fund will qualify as a RIC that is taxable under
Subchapter M, part 1, if expenses other than the Rule 12b-1 fees, fees paid
pursuant to shareholder servicing plans, and the Class Expenses described in
this letter are allocated to the shareholders disproportionately.

                                      11
<PAGE>
 
       This ruling is directed only to the funds.  Section 6110(j)(3) of the
Code provides that it may not be used or cited as precedent.

       A copy Of this letter should be attached to the Federal income tax return
of each fund for each taxable year in which the fund has outstanding classes of
shares described above.

                       Sincerely yours,
                       Assistant Chief Counsel
                       (Financial Institutions & Products)


                       By_________________________
                         William E. Coppersmith
                         Chief, Branch 2

Enclosure:
  6110 copy
                                      12



                                                                   Exhibit 17(a)
                                                                   -------------

                                                        Draft--February 22, 1996


            LORD ABBETT SECURITIES TRUST-LORD ABBETT BALANCED TRUST
                                        
     The undersigned hereby appoints KENNETH B. CUTLER, ROBERT S. DOW and RONALD
P. LYNCH and each of them proxies, with full power of substitution, to vote
(according to the number of votes which the undersigned would be entitled to
cast if then personally present) at the special meeting of shareholders of LORD
ABBETT SECURITIES TRUST on June 19, 1996, including all adjournments, as
specified below, and in their discretion upon such other business as may
properly be brought before the meeting.

THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF TRUSTEES WHO RECOMMEND THAT
YOU AUTHORIZE THE PROXIES TO VOTE FOR THE MATTERS SPECIFIED BELOW.

UNMARKED PROXIES WILL BE VOTED IN FAVOR OF EACH OF THE MATTERS SPECIFIED BELOW.

     1.    For [_] or against [_] or abstain from [_] the approval of the
           Agreement and Plan of Reorganization and the reorganization provided
           for therein, as described in the proxy statement and prospectus.

     2.    For [_] or against [_] or abstain from [_] the ratification of the
           selection of Deloitte & Touche LLP as independent public accountants
           of Lord Abbett Securities Trust for the fiscal year ending October
           31, 1996.


ACCOUNT NUMBER                       SHARES                     PROXY NUMBER

LORD ABBETT SECURITIES TRUST-
LORD ABBETT BALANCED TRUST


                                                   PLEASE FILL IN, DATE AND SIGN
                                                   PROXY AND RETURN IN THE
                                                   ENCLOSED ENVELOPE.

<PAGE>
 
                        For information as to the voting of stock registered in
                        more than one name, see page 2 of the proxy statement
                        and prospectus. When signing the proxy as attorney,
                        executor, administrator, trustee or guardian, please
                        indicate the capacity in which you are acting. Only
                        authorized officers should sign for corporations.

                        Date:...................................................
                        Signature(s) of Shareholder(s) as shown at left

                        ........................................................

                        ........................................................
                                       (Please read other side)

                                       2

                     IMPORTANT NEWS FROM LORD, ABBETT & CO.



We want to give you  advance  notice of some  changes  we will be  proposing  to
shareholders. As you know, Lord Abbett currently offers front-end load and level
load funds through two separate groups: the Lord Abbett Family of Funds and Lord
Abbett Counsel Group, respectively. In general, we are proposing a consolidation
of the  second  group  into the first  group,  which  would be  achieved  by the
issuance of Class A shares to represent  the Family of Funds and the issuance of
Class C shares to represent the former Counsel Group. Additionally, we intend to
offer B shares  in the near  future.  Many of you have  asked  for more  pricing
alternatives  and this  proxy  should  enable us to respond  to your  needs.  In
addition to offering more pricing  options,  we are  recommending  other changes
that  will  allow  for more  flexibility  in our  funds'  management  and in the
distribution of our funds' shares.

Shareholders  will receive proxy materials  describing these proposed changes in
April. We ask that you encourage your clients to vote their proxies promptly, as
additional  solicitations are costly to their funds. The shareholder  meeting is
scheduled for June 19, 1996. Soon thereafter, we will notify you of all approved
changes.

We believe these  changes will enhance our funds'  competitive  positioning.  We
appreciate  any efforts you can make in helping us secure a quorum and thank you
for your continued support.






                        LETTER TO SHAREHOLDERS RE: PROXY

                           (To go on Fund letterhead)



March __, 1996



Dear Shareholder:

In April, you will receive a proxy statement and ballot, requesting your vote on
several  important  proposals.  These proposed  changes are designed to maintain
your Fund's competitive position and to provide more management and distribution
flexibility. The proxy materials will describe all of the proposed changes.

We  ask  that  you  please  vote  your  proxy/proxies  promptly,  as  additional
solicitations are costly to your Fund. The shareholder  meeting is scheduled for
June 19, 1996. Soon thereafter, we will notify you of all approved changes.

We appreciate your cooperation in promptly returning your proxy card and we look
forward to continuing helping you meet your financial goals.



Sincerely,



Ronald P. Lynch
Chairman




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