LORD ABBETT BOND DEBENTURE FUND INC
497, 2000-05-15
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Lord Abbett
Bond-Debenture Fund

Prospectus
May 1, 2000


[logo]
As with all  mutual  funds,  the  Securities  and  Exchange  Commission  has not
approved or  disapproved  these  securities  or passed upon the adequacy of this
prospectus. Any representation to the contrary is a criminal offense.


<PAGE>

                               Table of Contents

                              The Fund
            What you should know        Goal                                2
                  about the Fund        Principal Strategy                  2
                                        Main Risks                          2
                                        Performance                         3
                                        Fees and Expenses                   5


                              Your Investment

        Information for managing        Purchases                           6
               your Fund account        Sales Compensation                  8
                                        Opening Your Account                9
                                        Redemptions                         10
                                        Distributions and Taxes             10
                                        Services For Fund Investors         11
                                        Management                          12


                              For More Information

               How to learn more        Other Investment Techniques         13
                  about the Fund        Glossary of Shaded Terms            13
                                        Recent Performance                  15


                              Financial Information

                                        Financial Highlights                16
                                        Line Graph Comparison               17
                                        Compensation For Your Dealer        18



     How to learn more about the        Back Cover
Fund and other Lord Abbett Funds


<PAGE>

                                                                        The Fund

GOAL

     The Fund's  investment  objective  is to seek high  current  income and the
     opportunity for capital appreciation to produce a high total return.


PRINCIPAL STRATEGY

     To pursue its goal, the Fund normally  invests in high yield and investment
     grade  debt  securities,  securities  convertible  into  common  stock  and
     preferred stocks. Under normal circumstances, the Fund invests at least 65%
     of its total assets in fixed income  securities of various types.  At least
     20% of the Fund's assets must be invested in any  combination of investment
     grade securities, U.S. Government securities and cash equivalents.


     We  believe  that  a  high  total  return   (current   income  and  capital
     appreciation)  may  be  derived  from  an  actively  managed,   diversified
     portfolio  of  investments.  Through  port-folio  diversification,   credit
     analysis and attention to current developments and trends in interest rates
     and economic  conditions,  we attempt to reduce the risks.  We seek unusual
     values,  using  fundamental,  bottom-up  research to  identify  undervalued
     securities.  In recent  years,  the Fund has found good value in high yield
     securities,  sometimes called  "lower-rated bonds" or "junk bonds," and has
     invested  more than half its assets in those  securities.  Higher  yield on
     debt  securities can occur during periods of high inflation when the demand
     for borrowed money is high. Also, buying  lower-rated bonds when we believe
     the credit risk is likely to decrease, may generate higher returns.

     While typically fully invested,  at times we may take a temporary defensive
     position by investing some of the Fund's assets in cash and short-term debt
     securities.  This could  reduce the benefit  from any upswing in the market
     and prevent the Fund from achieving its investment objective.


MAIN RISKS

     The Fund is subject to the general risks and considerations associated with
     investing in debt  securities.  The value of an investment in the Fund will
     change as interest rates  fluctuate in response to market  movements.  When
     interest rates rise,  the prices of debt  securities are likely to decline,
     and when interest rates fall, the prices of debt  securities  tend to rise.
     Longer-term  debt  securities  are usually more  sensitive to interest rate
     changes.  Put another  way,  the longer the  maturity  of a  security,  the
     greater  the  effect a change  in  interest  rates is likely to have on its
     price.

     There is also the risk that an issuer of a debt  security will fail to make
     timely  payments  of  principal  or  interest  to the Fund,  a risk that is
     greater with junk bonds.  Some  issuers,  particularly  of junk bonds,  may
     default as to principal  and/or interest  payments after the Fund purchases
     their securities.  This may result in losses to the Fund. In addition,  the
     market for high yield  securities  generally is less liquid than the market
     for higher-rated securities.

     An  investment  in the Fund is not a bank  deposit  and is not  insured  or
     guaranteed  by the  Federal  Deposit  Insurance  Corporation  or any  other
     government  agency.  The Fund is not a complete  investment program and may
     not be appropriate for all investors.  You could lose money by investing in
     the Fund.


We or the Fund refers to Lord Abbett Bond-Debenture Fund, Inc.

About the Fund. The Fund is a professionally managed portfolio primarily holding
securities purchased with the pooled money of investors. It strives to reach its
stated goal, although as with all funds, it cannot guarantee results.


You should read this entire prospectus, including "Other Investment Techniques,"
which concisely  describes the other investment  strategies used by the Fund and
their risks.


2 The Fund


<PAGE>

PERFORMANCE
     The bar chart and  table  below  provide  some  indication  of the risks of
     investing  in the  Fund  by  illustrating  the  variability  of the  Fund's
     returns.  Each assumes  reinvestment  of dividends and  distributions.  The
     Fund's past  performance  is not  necessarily an indication of how the Fund
     will perform in the future.

     The bar chart shows changes in the performance of the Fund's Class A shares
     from calendar year to calendar year.  This chart does not reflect the sales
     charges  applicable to Class A shares. If the sales charges were reflected,
     returns would be less.


================================================================================
Bar Chart (per calendar year) - Class A Shares

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

[GRAPHIC OMITTED]

Best Quarter   1st Q `91  13.8%               Worst Quarter   3rd Q `90    -8.2%

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


                                                                      The Fund 3


<PAGE>

     The table below shows how the average  annual  total  returns of the Fund's
     Class A, B, C and P shares  compared to those of a  broad-based  securities
     market index and three more  narrowly  based  indices.  Although the Fund's
     portfolio blend has changed through the years, historically it was composed
     primarily of three categories of securities:  (1) high-yield corporate debt
     (including straight preferred stocks); (2) equity-related  securities;  and
     (3)  high-grade  debt.  Because no single index existed that combined these
     categories  in a  manner  similar  to the  Fund,  we  compared  the  Fund's
     performance  to  that of  three  indices  which  included  elements  of the
     categories:  First Boston High Yield Index ("High Yield Index"); Value Line
     Convertible  Index  ("Value  Line  Index");   and  Salomon  Brothers  Broad
     Investment  Bond Index ("Salomon  Index").  The Fund now intends to replace
     the Value Line Index and the Salomon Index with the Lehman  Aggregate  Bond
     Index.  The  Lehman  Aggregate  Bond  Index  is not  only a  broader  based
     securities  market index but is also more commonly used in fund performance
     comparisons and more accessible to shareholders. The Fund's returns reflect
     payment of the maximum applicable front-end or deferred sales charges.


<TABLE>
<CAPTION>
==========================================================================================
Average Annual Total Returns Through December 31, 1999

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

Share Class                         1 Year      5 Years     10 Years    Since Inception(1)

<S>                                 <C>          <C>          <C>            <C>
Class A shares                     -1.00%        8.83%        9.70%             -
- ------------------------------------------------------------------------------------------
Class B shares                     -1.51%          -            -            6.76%
- ------------------------------------------------------------------------------------------
Class C shares                      2.21%          -            -            7.76%
- ------------------------------------------------------------------------------------------
Class P shares                      3.86%         -             -            4.12%
- ------------------------------------------------------------------------------------------
Lehman Aggregate Bond Index(2)     -0.82%        7.73%        7.70%          6.63%(3)
                                                                             6.41%(4)
                                                                             1.38%(5)
- ------------------------------------------------------------------------------------------
Salomon  Index(2)                  -0.84%        7.75%        7.76%          6.64%(3)
                                                                             6.43%(4)
                                                                             1.46%(5)
- ------------------------------------------------------------------------------------------
High Yield Index(2)                 3.28%        9.07%       11.06%          3.21%(3)
                                                                             3.33%(4)
                                                                             4.54%(5)
- ------------------------------------------------------------------------------------------
Value Line Index(2)                19.50%       14.56%       15.25%          3.40%(3)
                                                                            -3.10%(4)
                                                                            10.05%(5)
- ------------------------------------------------------------------------------------------
</TABLE>

(1)  The date of  inception  for each  class  is: A - 4/1/71;  B -  8/1/96;  C -
     7/15/96 and P - 8/21/98.
(2)  Performance  for  the  unmanaged  indices  does  not  reflect  any  fees or
     expenses. The performance of the indices is not necessarily  representative
     of the Fund's performance.
(3)  Represents  total return for the period 8/31/96 to 12/31/99,  to correspond
     with Class B inception date.
(4)  Represents  total return for the period 7/31/96 to 12/31/99,  to correspond
     with Class C inception date.
(5)  Represents  total return for the period 8/31/98 to 12/31/99,  to correspond
     with Class P inception date.


4 The Fund


<PAGE>

FEES AND EXPENSES
     This table  describes the fees and expenses that you may pay if you buy and
     hold shares of the Fund.

<TABLE>
<CAPTION>
=====================================================================================================
Fee Table

=====================================================================================================
                                              Class A    Class B(2)   Class C      Class P

Shareholder Fees (Fees paid directly from your investment)
- -----------------------------------------------------------------------------------------------------
Maximum Sales Charge on Purchases
- -----------------------------------------------------------------------------------------------------
<S>                                            <C>         <C>         <C>         <C>
(as a % of offering price)                     4.75%       none        none        none
- -----------------------------------------------------------------------------------------------------
Maximum Deferred Sales Charge                   none(1)    5.00%       1.00%(1)    none
- -----------------------------------------------------------------------------------------------------
Annual Fund Operating Expenses (Expenses deducted from Fund assets) (as a % of average net assets)(3)
- -----------------------------------------------------------------------------------------------------
Management Fees (See "Management")             0.46%       0.46%       0.46%       0.46%
- -----------------------------------------------------------------------------------------------------
Distribution (12b-1) and Service Fees(4)       0.35%       1.00%       1.00%       0.45%
- -----------------------------------------------------------------------------------------------------
Other Expenses                                 0.14%       0.14%       0.14%       0.14%
- -----------------------------------------------------------------------------------------------------
Total Operating Expenses                       0.95%       1.60%       1.60%       1.05%
- -----------------------------------------------------------------------------------------------------
</TABLE>

(1)  A  contingent  deferred  sales  charge of 1.00% may be  assessed on certain
     redemptions  of (a) Class A shares  made  within 24  months  following  any
     purchases  made without a sales charge,  and (b) Class C shares if they are
     redeemed before the first anniversary of their purchase.

(2)  Class B shares will convert to Class A shares on the eighth  anniversary of
     your original purchase of Class B shares.

(3)  The annual  operating  expenses have been restated from fiscal year amounts
     to reflect current fees.

(4)  Because  12b-1 fees are paid out on an ongoing  basis,  over time they will
     increase  the cost of your  investment  and may cost you more  than  paying
     other types of sales charges.



================================================================================
Example
================================================================================
This  example is intended to help you compare the cost of  investing in the Fund
with the cost of investing in other mutual  funds.  This  example,  like that in
other  funds'  prospectuses,  assumes  that you  invest  $10,000  in the Fund at
maximum sales charge, if any, for the time periods indicated and then redeem all
of your shares at the end of those  periods.  The example also assumes that your
investment  has a 5% return  each year and that the  Fund's  operating  expenses
remain the same.  Although  your actual  costs may be higher or lower,  based on
these  assumptions,  your costs  (including any applicable  contingent  deferred
sales  charges)  would be:

<TABLE>
<CAPTION>
Share Class                 1 Year           3 Years        5 Years         10 Years

<S>                          <C>              <C>             <C>            <C>
Class A shares               $567             $763            $  976         $1,586
====================================================================================
Class B shares               $663             $805            $1,071         $1,726
====================================================================================
Class C shares               $263             $505            $  871         $1,900
====================================================================================
Class P shares               $107             $334            $  579         $1,283
====================================================================================
You would have paid the following expenses if you did not redeem your shares:
Class A shares               $567             $763            $  976         $1,586
====================================================================================
Class B shares               $163             $505            $  871         $1,726
====================================================================================
Class C shares               $163             $505            $  871         $1,900
====================================================================================
Class P shares               $107             $334            $  579         $1,283
====================================================================================

</TABLE>


Management fees are payable to Lord, Abbett & Co. ("Lord Abbett") for the Fund's
investment management.

12b-1 fees refer to fees incurred for activities that are primarily  intended to
result in the sale of Fund  shares  and  service  fees for  shareholder  account
service and maintenance.

Other  expenses  include fees paid for  miscellaneous  items such as shareholder
service fees and professional fees.


                                                                      The Fund 5


<PAGE>

                                                                 Your Investment

PURCHASES

     The Fund offers in this prospectus  four classes of shares:  Class A, B ,C,
     and P, each with different expenses and dividends.  You may purchase shares
     at the net asset value ("NAV") per share  determined  after we receive your
     purchase  order  submitted in proper form. A front-end  sales charge may be
     added to the NAV in the case of the Class A shares.  There is no  front-end
     sales  charge in the case of the Class B, C, and P shares,  although  there
     may be a contingent  deferred sales charge  ("CDSC") on Class B and Class C
     shares as described below.

     You should read this section  carefully to determine  which class of shares
     represents the best investment option for your particular situation. It may
     not be  suitable  for you to place a  purchase  order for Class B shares of
     $500,000 or more or a purchase  order for Class C shares of  $1,000,000  or
     more. You should discuss pricing options with your investment professional.


     For more information, see "Alternative Sales Arrangements" in the Statement
     of Additional Information.

     We reserve the right to withdraw  all or any part of the  offering  made by
     this  prospectus or to reject any purchase order. We also reserve the right
     to waive or change minimum investment requirements. All purchase orders are
     subject to our acceptance  and are not binding until  confirmed or accepted
     in writing.

- --------------------------------------------------------------------------------
Share Classes
- --------------------------------------------------------------------------------

Class A   o    normally offered with a front-end sales charge

Class B   o    no front-end sales charge,  however,  a CDSC is applied to shares
               sold prior to the sixth anniversary of purchase

          o    higher annual expenses than Class A shares

          o    automatically converts to Class A shares after eight years

Class C   o    no front-end sales charge,  however,  a CDSC is applied to shares
               sold prior to the first anniversary of purchase

          o    higher annual expenses than Class A shares

Class P   o    available to certain pension or retirement  plans and pursuant to
               a Mutual Fund Fee Based Program

- --------------------------------------------------------------------------------
Front-End Sales Charges - Class A Shares
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
                                                                            To Compute
                             As a % of               As a % of             OfferingPrice
Your Investment           Offering Price          Your Investment          Divide NAV by
- -------------------------------------------------------------------------------------------------------------------
<S>                           <C>                     <C>                       <C>
Less than $100,000            4.75%                   4.99%                     .9525
- -------------------------------------------------------------------------------------------------------------------
$100,000 to $249,999          3.95%                   4.11%                     .9605
- -------------------------------------------------------------------------------------------------------------------
$250,000 to $499,999          2.75%                   2.83%                     .9725
- -------------------------------------------------------------------------------------------------------------------
$500,000 to $999,999          1.95%                   1.99%                     .9805
- -------------------------------------------------------------------------------------------------------------------
$1,000,000 and over       No Sales Charge                                      1.0000
- -------------------------------------------------------------------------------------------------------------------
</TABLE>


NAV per share for each class of Fund shares is  calculated  each business day at
the close of regular trading on the New York Stock Exchange  ("NYSE"),  normally
4:00 p.m.  Eastern time.  Purchases and sales of Fund shares are executed at the
NAV next  determined  after the Fund  receives  your  order in proper  form.  In
calculating NAV, securities for which market quotations are available are valued
at those quotations.  Securities for which such quotations are not available are
valued at fair value under procedures approved by the Board of the Fund.


6 Your Investment


<PAGE>

     Reducing  Your  Class A  Front-End  Sales  Charges.  Class A shares  may be
     purchased  at a  discount  if you  qualify  under  either of the  following
     conditions:

     o    Rights  of  Accumulation  -- A  Purchaser  may  apply the value of the
          shares  already  owned to a new  purchase  of  Class A  shares  of any
          Eligible Fund in order to reduce the sales charge.

     o    Letters of  Intention  -- A Purchaser  of Class A shares may  purchase
          additional  shares of any  Eligible  Fund over a  13-month  period and
          receive the same sales  charge as if you had  purchased  all shares at
          once.   Shares   purchased   through   reinvestment  of  dividends  or
          distributions are not included. A Letter of Intention can be backdated
          90 days. Current holdings under Rights of Accumulation may be included
          in a Letter of Intention.


     For  more  information  on  eligibility  for  these  privileges,  read  the
     applicable sections in the attached application.

     Class A Share Purchases  Without A Front-End  Sales Charge.  Class A shares
     may  be  purchased  without  a  front-end  sales  charge  under  any of the
     following conditions:

     o    purchases of $1 million or more *

     o    purchases by Retirement Plans with at least 100 eligible employees *

     o    purchases under a Special Retirement Wrap Program *

     o    purchases made with dividends and  distributions  on Class A shares of
          another Eligible Fund

     o    purchases  representing  repayment  under the loan feature of the Lord
          Abbett-sponsored prototype 403(b) Plan for Class A shares

     o    purchases by employees of any  consenting  securities  dealer having a
          sales agreement with Lord Abbett Distributor

     o    purchases under a Mutual Fund Fee Based Program

     o    purchases by trustees or custodians  of any pension or profit  sharing
          plan, or payroll  deduction  IRA for the  employees of any  consenting
          securities   dealer  having  a  sales   agreement   with  Lord  Abbett
          Distributor

     o    purchases by each Lord  Abbett-sponsored  fund's Directors or Trustees
          (including  retired  Directors  or  Trustees),  officers  of each Lord
          Abbett-sponsored  fund,  employees and partners of Lord Abbett.  These
          categories  of purchasers  also include  other family  members of such
          purchasers.


     See  the  Statement  of  Additional  Information  for a  listing  of  other
     categories of purchasers who qualify for Class A share purchases  without a
     front-end sales charge.

     *    These categories may be subject to a CDSC.

     Class A Share CDSC.  If you buy Class A shares under one of the starred (o)
     categories  listed  above and you redeem any of them within 24 months after
     the month in which you  initially  purchased  them,  the Fund normally will
     collect a CDSC of 1%.

     The  Class  A  share  CDSC  generally  will be  waived  for  the  following
     conditions:

     o    benefit  payments  under  Retirement  Plans in connection  with loans,
          hardship withdrawals, death, disability,  retirement,  separation from
          service   or  any   excess   distribution   under   Retirement   Plans
          (documentation may be required)

     o    redemptions continuing as investments in another fund participating in
          a Special Retirement Wrap Program


Retirement Plans include employer-sponsored  retirement plans under the Internal
Revenue Code, excluding Individual Retirement Accounts.

Lord  Abbett  offers a  variety  of  Retirement  Plans.  Call  800-253-7299  for
information about:

o    Traditional, Rollover, Roth and Education IRAs

o    Simple IRAs, SEP-IRAs, 401(k) and 403(b) accounts

o    Defined Contribution Plans


Lord Abbett  Distributor LLC ("Lord Abbett  Distributor")  acts as agent for the
Fund to work with investment professionals wj8

ho buy and/or  sell  shares of the Fund on behalf of their  clients.  Generally,
Lord Abbett Distributor does not sell Fund shares directly to investors.


Benefit Payment Documentation (Class A CDSC only)

o    under $50,000 - no documentation necessary


                                                               Your Investment 7


<PAGE>

     Class B Share  CDSC.  The CDSC for Class B shares  normally  applies if you
     redeem your shares before the sixth  anniversary of their initial purchase.
     The  CDSC  declines  the  longer  you own  your  shares,  according  to the
     following schedule:

- --------------------------------------------------------------------------------
Contingent Deferred Sales Charges - Class B Shares
- --------------------------------------------------------------------------------

Anniversary(1) of the day on                   Contingent Deferred Sales Charge
which the purchase order                       on redemption (as % of amount
was accepted                                   subject to charge)

On                             Before
- --------------------------------------------------------------------------------
                               1st                               5.0%
- --------------------------------------------------------------------------------
1st                            2nd                               4.0%
- --------------------------------------------------------------------------------
2nd                            3rd                               3.0%
- --------------------------------------------------------------------------------
3rd                            4th                               3.0%
- --------------------------------------------------------------------------------
4th                            5th                               2.0%
- --------------------------------------------------------------------------------
5th                            6th                               1.0%
- --------------------------------------------------------------------------------
on or after the 6th (2)                                          None
- --------------------------------------------------------------------------------


(1)  The  anniversary is the same calendar day in each respective year after the
     date of purchase.  For example, the anniversary for shares purchased on May
     1 will be May 1 of each succeeding year.

(2)  Class B shares will  automatically  convert to Class A shares on the eighth
     anniversary of the purchase of Class B shares.

Different conversion schedules may apply to Class B shares purchased by or on
behalf of retirement plans in connection with certain special programs or
platforms created and maintained by certain broker-dealer firms.

     The  Class B share  CDSC  generally  will be  waived  under  the  following
     circumstances:

     o    benefit  payments  under  Retirement  Plans in connection  with loans,
          hardship withdrawals, death, disability,  retirement,  separation from
          service or any excess  contribution or distribution  under  Retirement
          Plans

     o    Eligible  Mandatory  Distributions  under 403(b) Plans and  individual
          retirement accounts o death of the shareholder

     o    redemptions  of shares in  connection  with  Div-Move  and  Systematic
          Withdrawal Plans (up to 12% per year)


     See "Systematic  Withdrawal Plan" under "Services For Fund Investors" below
     for more information on CDSCs with respect to Class B shares.

     Class C Share CDSC. The 1% CDSC for Class C shares normally  applies if you
     redeem your shares  before the first  anniversary  of the  purchase of such
     shares.

     Class P Shares.  Class P shares have lower annual expenses than Class B and
     Class C shares, no front-end sales charge,  and no CDSC. Class P shares are
     currently  sold and redeemed at NAV (a) pursuant to a Mutual Fund Fee Based
     Program, or (b) to the trustees of, or  employer-sponsors  with respect to,
     pension or retirement plans with at least 100 eligible employees (such as a
     plan under Section 401(a),  401(k) or 457(b) of the Internal  Revenue Code)
     which engage an investment  professional  providing or  participating in an
     agreement  to  provide   certain   recordkeeping,   administrative   and/or
     sub-transfer  agency  services  to  the  Fund  on  behalf  of the  Class  P
     shareholders.


SALES COMPENSATION

     As part of its  plan for  distributing  shares,  the  Fund and Lord  Abbett
     Distributor pay sales and service  compensation to Authorized  Institutions
     that sell the Fund's shares and service its shareholder accounts.

     Sales compensation originates from two sources, as shown in the table "Fees
     and Expenses:" sales charges which are paid directly by  shareholders;  and
     12b-1  distribution


o    over $50,000 - reason for benefit payment must be received in writing.  Use
     the address indicated under "Opening your Account"


8 Your Investment


<PAGE>

     fees  that  are  paid  out  of  the  Fund's  assets.  Service  compensation
     originates  from 12b-1  service  fees.  The total 12b-1 fees  payable  with
     respect  to  each  share  class  are up to .35% of  Class  A  shares  (plus
     distribution fees of up to 1.00% on certain qualifying purchases), 1.00% of
     Class B and Class C shares, and .45% of Class P shares. The amounts payable
     as compensation to Authorized Institutions,  such as your dealer, are shown
     in  the  chart  at  the  end  of  this  prospectus.  The  portion  of  such
     compensation  paid to Lord Abbett  Distributor  is  discussed  under "Sales
     Activities" and "Service Activities."  Sometimes we do not pay compensation
     where  tracking  data is not  available  for certain  accounts or where the
     Authorized  Institution waives part of the compensation.  In such cases, we
     may not require payment of any otherwise applicable CDSC.

     We may pay Additional  Concessions to Authorized  Institutions from time to
     time.

     Sales  Activities.  We may use 12b-1  distribution  fees to pay  Authorized
     Institutions to finance any activity which is primarily  intended to result
     in the sale of shares.  Lord  Abbett  Distributor  uses its  portion of the
     distribution fees attributable to the Fund's Class A and Class C shares for
     activities which are primarily intended to result in the sale of such Class
     A and Class C shares,  respectively.  These activities include, but are not
     limited  to,  printing  of   prospectuses   and  statements  of  additional
     information and reports for other than existing  shareholders,  preparation
     and distribution of advertising and sales material,  expenses of organizing
     and  conducting  sales  seminars,   Additional  Concessions  to  Authorized
     Institutions,  the cost necessary to provide distribution-related  services
     or  personnel,  travel,  office  expenses,  equipment  and other  allocable
     overhead.

     Service   Activities.   We  may  pay  12b-1   service  fees  to  Authorized
     Institutions  for any  activity  which is  primarily  intended to result in
     personal  service  and/or the  maintenance  of  shareholder  accounts.  Any
     portion of the service fees paid to Lord Abbett Distributor will be used to
     service and maintain shareholder accounts.



OPENING YOUR ACCOUNT

     MINIMUM INITIAL INVESTMENT

     o Regular Account                                                  $1,000
- --------------------------------------------------------------------------------
     o Individual Retirement Accounts and
     403(b) Plans under the Internal Revenue Code                         $250
- --------------------------------------------------------------------------------
     o Uniform Gift to Minor Account                                      $250
- --------------------------------------------------------------------------------
     o Invest-A-Matic                                                     $250
- --------------------------------------------------------------------------------
     For  Retirement  Plans  and  Mutual  Fund Fee  Based  Programs  no  minimum
     investment is required, regardless of share class.

     You may purchase shares through any independent securities dealer who has a
     sales  agreement  with  Lord  Abbett  Distributor  or you can  fill out the
     attached  application  and send it to the Fund at the address stated below.
     You should carefully read the paragraph below entitled "Proper Form" before
     placing your order to ensure that your order will be accepted.

     Lord Abbett Bond-Debenture Fund, Inc.
     P.O. Box 219100
     Kansas City, MO 64121

     By Exchange. Telephone the Fund at 800-821-5129 to request an exchange from
     any eligible Lord Abbett-sponsored fund.


CDSC,   regardless  of  class,  is  not  charged  on  shares  acquired   through
reinvestment of dividends or capital gains  distributions  and is charged on the
original  purchase  cost or the current  market  value of the shares at the time
they are being sold, which-ever is lower. In addition,  repayment of loans under
Retirement  Plans and 403(b)  Plans will  constitute  new sales for  purposes of
assessing the CDSC.

To minimize  the amount of any CDSC,  the Fund redeems  shares in the  following
order:

1.   shares acquired by reinvestment of dividends and capital gains (always free
     of a CDSC)

2.   shares  held for six years or more (Class B) or two years or more after the
     month of purchase (Class A) or one year or more (Class C)

3.   shares  held the longest  before the sixth  anniversary  of their  purchase
     (Class B) or before  the  second  anniversary  after the month of  purchase
     (Class A) or before the first anniversary of their purchase (Class C).


                                                               Your Investment 9


<PAGE>

     Proper Form. An order  submitted  directly to the Fund must contain:  (1) a
     completed application, and (2) payment by check. When purchases are made by
     check,  redemption  proceeds  will not be paid  until the Fund or  transfer
     agent is  advised  that the  check  has  cleared,  which  may take up to 15
     calendar days. For more information call the Fund at 800-821-5129.


REDEMPTIONS

     By Broker.  Call your investment  professional  for  instructions on how to
     redeem your shares.

     By  Telephone.  To obtain the proceeds of a  redemption  of $50,000 or less
     from  your  account,  you or your  representative  should  call the Fund at
     800-821-5129.

     By Mail.  Submit a written  redemption  request  indicating  the name(s) in
     which the account is registered, the Fund's name, the class of shares, your
     account number, and the dollar value or number of shares you wish to sell.

     Include all necessary signatures. If the signer has any Legal Capacity, the
     signature and capacity must be guaranteed by an Eligible Guarantor. Certain
     other legal documentation may be required.  For more information  regarding
     proper documentation call 800-821-5129.

     Normally a check  will be mailed to the  name(s)  and  address in which the
     account is registered (or otherwise  according to your instruction)  within
     three business days after receipt of your redemption request.  Your account
     balance  must be  sufficient  to cover the amount  being  redeemed  or your
     redemption order will not be processed.  Under unusual  circumstances,  the
     Fund may suspend redemptions, or postpone payment for more than seven days,
     as permitted by federal securities laws.

     To determine if a CDSC applies to a  redemption,  see "Class A share CDSC,"
     "Class B share CDSC" or "Class C share CDSC."


DISTRIBUTIONS AND TAXES

     The Fund normally pays dividends from its net investment income monthly and
     distributes  net capital  gains (if any) as "capital  gains  distributions"
     annually.  Your  distributions  will be  reinvested  in the Fund unless you
     instruct the Fund to pay them to you in cash. There are no sales charges on
     reinvestments.  The  tax  status  of  distributions  is the  same  for  all
     shareholders  regardless of how long they have owned Fund shares or whether
     distributions are reinvested or paid in cash.

     Except in tax-advantaged accounts, any sale, redemption or exchange of Fund
     shares may be taxable to the shareholder.

     Information on the tax treatment of distributions,  including the source of
     dividends and distributions of capital gains by the Fund, will be mailed to
     shareholders  each year.  Because  everyone's tax situation is unique,  you
     should  consult your tax adviser  regarding the treatment of  distributions
     under the federal,  state and local tax rules that apply to you, as well as
     the tax  consequences of gains or losses from the redemption or exchange of
     your shares.


Exchange  Limitations.  Exchanges should not be used to try to take advantage of
short-term swings in the market.  Frequent  exchanges create higher expenses for
the Fund.  Accordingly,  the Fund reserves the right to limit or terminate  this
privilege  for  any  shareholder   making  frequent  exchanges  or  abusing  the
privilege.  The Fund also may revoke the privilege for all shareholders  upon 60
days' written notice.


10 Your Investment


<PAGE>

SERVICES FOR FUND INVESTORS

AUTOMATIC SERVICES

     Buying or selling shares  automatically is easy with the services described
     below.  With each  service,  you select a schedule  and amount,  subject to
     certain  restrictions.  You may set up most of these  services when filling
     out your application or by calling 800-821-5129.


- --------------------------------------------------------------------------------
For investing

Invest-A-Matic      You may make fixed,  periodic investments ($50 minimum) into
(Dollar-cost        your Fund account by means of automatic money transfers from
checking averaging) your  bank  account.   See  the  attached   application  for
                    instructions.

Div-Move            You   may   automatically   reinvest   the   dividends   and
                    distributions  from your account into another account in any
                    Eligible Fund ($50 minimum).

For selling shares

Systematic          You can make  regular  withdrawals  from  most  Lord  Abbett
Withdrawal          funds.  Automatic cash  withdrawals will be paid to you from
Plan ("SWP")        your  account in fixed or variable  amounts.  To establish a
                    plan,  the value of your  shares  must be at least  $10,000,
                    except for Retirement Plans for which there is no minimum.

Class B shares      The CDSC will be waived on  redemptions  of up to 12% of the
                    current net asset value of your  account at the time of your
                    SWPrequest. For Class B share redemptions over 12% per year,
                    the CDSC will apply to the entire redemption. Please contact
                    the  Fund  for  assistance  in  minimizing  the CDSC in this
                    situation.


Class B and         Redemption  proceeds  due to a SWP for  Class B and  Class C
C shares            shares will be redeemed in the order  described under "CDSC"
                    under "Purchases."
- --------------------------------------------------------------------------------


OTHER SERVICES

     Telephone  Investing.  After  we have  received  the  attached  application
     (selecting  "yes"  under  Section  8C and  completing  Section  7), you may
     instruct us by phone to have money  transferred  from your bank  account to
     purchase shares of the Fund for an existing account. The Fund will purchase
     the requested shares when it receives the money from your bank.

     Exchanges.  You or your  investment  professional  may instruct the Fund to
     exchange  shares of any class for shares of the same class of any  Eligible
     Fund.  Instruction may be provided in writing or by telephone,  with proper
     identification, by calling 800-821-5129. The Fund must receive instructions
     for the exchange  before the close of the NYSE on the day of your call,  in
     which case you will get the NAV per share of the Eligible  Fund  determined
     on that day.  Exchanges will be treated as a sale for federal tax purposes.
     Be sure to read the  current  prospectus  for any Fund  into  which you are
     exchanging.

     Reinvestment Privilege. If you sell shares of the Fund, you have a one-time
     right to  reinvest  some or all of the  proceeds  in the same  class of any
     Eligible  Fund within 60 days  without a sales  charge.  If you paid a CDSC
     when you sold your  shares,  you will be  credited  with the  amount of the
     CDSC. All accounts involved must have the same registration.

     Account  Statements.  Every Lord  Abbett  investor  automatically  receives
     quarterly account statements.

     Householding. Shareholders with the same last name and address will receive
     a single copy of a prospectus and an annual and semi-annual report,  unless
     additional reports are specifically requested in writing to the Fund.


Small Accounts.  Our Board may authorize  closing any account in which there are
fewer than 25 shares if it is in the Fund's best interest to do so.

Eligible Guarantor is any broker or bank that is a member of the medallion stamp
program.  Most major securities  firms and banks are members of this program.  A
notary public is not an eligible guarantor.


                                                              Your Investment 11


<PAGE>

     Account Changes. For any changes you need to make to your account,  consult
     your investment professional or call the Fund at 800-821-5129.

     Systematic  Exchange.  You or your investment  professional can establish a
     schedule of exchanges between the same classes of any Eligible Fund.


MANAGEMENT

     The Fund's  investment  adviser is Lord,  Abbett & Co.,  90 Hudson  Street,
     Jersey City, NJ 07302-3973. Founded in 1929, Lord Abbett manages one of the
     nation's oldest mutual fund complexes,  with  approximately  $35 billion in
     more than 40 mutual fund portfolios and other advisory  accounts.  For more
     information  about the services Lord Abbett  provides to the Fund,  see the
     Statement of Additional Information.

     Lord  Abbett is entitled  to an annual  management  fee based on the Fund's
     average daily net assets.  The fee is calculated and payable  monthly.  The
     management fee is calculated at the following annual rates:

            .50 of 1% on the first $500  million in assets,
            .45 of 1% on assets over $500 million.

     Based on this  calculation,  the management fee paid to Lord Abbett for the
     fiscal year ended December 31, 1999 was at an effective  annual rate of .46
     of 1%. The Fund pays all expenses not expressly assumed by Lord Abbett.

     Investment  Managers.  Lord Abbett uses a team of  investment  managers and
     analysts acting together to manage the Fund's  investments.  Christopher J.
     Towle,  Partner of Lord Abbett, heads the team, the other senior members of
     which include Richard Szaro,  Michael  Goldstein and Thomas Baade.  Messrs.
     Towle  and  Szaro  have  been  with  Lord  Abbett   since  1988  and  1983,
     respectively.  Mr.  Goldstein has been with Lord Abbett since 1997.  Before
     joining Lord Abbett,  Mr. Goldstein was a bond trader for Credit Suisse BEA
     Associates  from August 1992  through  April 1997.  Mr.  Baade  joined Lord
     Abbett in 1998; prior to that he was a credit analyst with Greenwich Street
     Advisors.


Telephone Transactions. You have this privilege unless you refuse it in writing.
For your security,  telephone  transaction  requests are recorded.  We will take
measures to verify the  identity  of the  caller,  such as asking for your name,
account  number,  social  security or taxpayer  identification  number and other
relevant  information.  The Fund will not be liable for  following  instructions
communicated by telephone that it reasonably believes to be genuine.

Transactions  by  telephone  may be  difficult  to implement in times of drastic
economic or market change.


12 Your Investment


<PAGE>

                                                            For More Information

OTHER INVESTMENT TECHNIQUES

     This section describes some of the investment techniques that might be used
     by the Fund and their risks.

     Adjusting  Investment  Exposure.  The Fund may, but is not required to, use
     various strategies to change its investment  exposure to adjust to changing
     security prices,  interest rates, currency exchange rates, commodity prices
     and other factors.  The Fund may use these  transactions to change the risk
     and return characteristics of the Fund's portfolio.

     If we judge market  conditions  incorrectly or use a strategy that does not
     correlate well with the Fund's investments, it could result in a loss, even
     if we intended to lessen risk or enhance  returns.  These  transactions may
     involve a small  investment  of cash  compared to the magnitude of the risk
     assumed and could produce disproportionate gains or losses.

     Convertible  Securities.  The Fund may  invest  in  convertible  bonds  and
     convertible  stocks.  These  investments tend to be more volatile than debt
     securities  but tend to be less volatile and produce more income than their
     underlying common stocks.

     Foreign  Securities.  The Fund may  invest  up to 20% of its net  assets in
     foreign securities.  Foreign securities are securities  primarily traded in
     countries  outside the United  States.  Foreign  markets and the securities
     traded in them are not  subject to the same  degree of  regulation  as U.S.
     markets. Securities clearance and settlement procedures may be different in
     foreign  countries.  There may be less trading  volume in foreign  markets,
     subjecting  the  securities  traded in them to higher  price  fluctuations.
     Transaction  costs  may be  higher in  foreign  markets.  The Fund may hold
     foreign  securities which trade on days when the Fund does not sell shares.
     As a result,  the value of the Fund's  portfolio  securities  may change on
     days an investor may not purchase or sell Fund shares.

     Foreign issuers are generally not subject to similar,  uniform  accounting,
     auditing and financial  reporting  requirements  as U.S.  issuers.  Foreign
     investments  may be  affected  by changes  in  currency  rates or  currency
     controls.  Certain foreign countries may limit the Fund's ability to remove
     its assets from the  country.  With respect to certain  foreign  countries,
     there is a possibility of  nationalization,  expropriation  or confiscatory
     taxation, imposition of withholding or other taxes, and political or social
     instability which could affect investments in those countries.

     Short-Term  Fixed  Income  Securities.  The Fund is  authorized  to  invest
     temporarily in certain short-term fixed income securities.  Such securities
     may be used to invest  uncommitted cash balances,  to maintain liquidity to
     meet shareholder  redemptions,  or to take a temporary  defensive  position
     against market declines. These securities include:  obligations of the U.S.
     Government and its agencies and  instrumentalities;  commercial paper, bank
     certificates  of  deposit,   and  bankers'   acceptances;   and  repurchase
     agreements collateralized by these securities.


GLOSSARY OF SHADED TERMS

     Additional Concessions. Lord Abbett Distributor may, for specified periods,
     allow  dealers to retain the full sales charge for sales of shares,  or may
     pay an additional  concession to a dealer who sells a minimum dollar amount
     of our shares and/or shares of other Lord  Abbett-sponsored  funds. In some
     instances,  such  additional  concessions  will be offered  only to certain
     dealers expected to sell significant amounts of shares.  Additional


                                                         For More Information 13


<PAGE>

     payments may be paid from Lord Abbett  Distributor's  own resources or from
     distribution  fees  received  from the Fund and will be made in the form of
     cash or, if  permitted,  non-cash  payments.  The  non-cash  payments  will
     include business seminars at Lord Abbett's headquarters or other locations,
     including meals and entertainment,  or the receipt of merchandise. The cash
     payments may include payment of various business expenses of the dealer.

     In  selecting  dealers to  execute  portfolio  transactions  for the Fund's
     portfolio,  if two or more dealers are considered capable of obtaining best
     execution,  we may prefer the dealer who has sold our shares  and/or shares
     of other Lord Abbett-sponsored funds.

     Authorized  Institutions.  Institutions  and  persons  permitted  by law to
     receive  service  and/or  distribution  fees  under a Rule  12b-1  plan are
     "Authorized   Institutions."  Lord  Abbett  Distributor  is  an  Authorized
     Institution.

     Eligible  Fund. An Eligible Fund is any Lord  Abbett-sponsored  fund except
     for:  (1)  certain  tax-free,   single-state  funds  where  the  exchanging
     shareholder  is a resident of a state in which such fund is not offered for
     sale;  (2) Lord Abbett Equity Fund;  (3) Lord Abbett  Series Fund;  and (4)
     Lord Abbett U.S. Government  Securities Money Market Fund ("GSMMF") (except
     for holdings in GSMMF which are attributable to any shares  ex-changed from
     the Lord Abbett family of funds).  An Eligible Fund also is any  Authorized
     Institution's   affiliated   money  market  fund   satisfying  Lord  Abbett
     Distributor as to certain omnibus accounts and other criteria.

     Eligible Mandatory Distributions.  If Class B shares represent a part of an
     individual's total IRA or 403(b)  investment,  the CDSC will be waived only
     for that part of a manda-tory distribution which bears the same relation to
     the entire mandatory  distribution as the Class B share investment bears to
     the total investment.

     Legal  Capacity.  This term refers to the authority of an individual to act
     on behalf of an entity or other  person(s).  For  example,  if a redemption
     request were to be made on behalf of the estate of a deceased  shareholder,
     John W. Doe, by a person  (Robert A. Doe) who has the legal capacity to act
     for the estate of the  deceased  shareholder  because he is the executor of
     the estate,  then the request  must be executed as follows:  Robert A. Doe,
     Executor of the Estate of John W. Doe. That  signature  using that capacity
     must be by an Eligible Guarantor.

     Similarly,  if (for example) a redemption  request is made on behalf of the
     ABC Corporation by a person (Mary B. Doe) who has the legal capacity to act
     on the  behalf of the  Corporation,  because  she is the  president  of the
     Corporation,  the request must be executed as follows:  ABC  Corporation by
     Mary  B.  Doe,  President.  That  signature  using  that  capacity  must be
     guaranteed by an Eligible Guarantor (see example in right column).

     Mutual Fund Fee Based Program.  Certain  unaffiliated  authorized  brokers,
     dealers,  registered  investment  advisers or other financial  institutions
     ("entities")   who  either  (1)  have  an  arrangement   with  Lord  Abbett
     Distributor in accordance  with certain  standards  approved by Lord Abbett
     Distributor,  providing  specifically  for  the  use  of  our  shares  (and
     sometimes providing for acceptance of orders for such shares on our behalf)
     in particular  investment  products made  available for a fee to clients of
     such entities, or (2) charge an advisory, consulting or other fee for their
     services  and buy shares for their own  accounts  or the  accounts of their
     clients.

     Purchaser.  The  term  "purchaser"  includes:  (1)  an  individual;  (2) an
     individual  and his or her spouse and children under the age of 21; and (3)
     a trustee or other fiduciary purchasing shares for a single trust estate or
     single  fiduciary  account  (including a pension,  profit-sharing  plan, or
     other employee  benefit trust  qualified  under Section 401 of the Internal
     Revenue Code - more than one qualified  employee  benefit trust of a single


GUARANTEED SIGNATURE. An acceptable form of guarantee would be as follows:

  In the case of the estate --

    Robert A. Doe
    Executor of the Estate of
    John W. Doe

    [Date]

             SIGNATURE GUARANTEED
             MEDALLION GUARANTEED
              NAME OF GUARANTOR

            [SIGNATURE ILLEGIBLE]
- --------------------------------------------------
                            AUTHORIZED SIGNATURE
(960)                            X 9 6 0 3 4 7 0
SECURITIES TRANSFER AGENTS MEDALLION PROGRAM'sm'
                                              SR

  In the case of the corporation --
  ABC Corporation

    Mary B. Doe

    By Mary B. Doe, President

    [Date]

             SIGNATURE GUARANTEED
             MEDALLION GUARANTEED
              NAME OF GUARANTOR

            [SIGNATURE ILLEGIBLE]
- --------------------------------------------------
                            AUTHORIZED SIGNATURE
(960)                            X 9 6 0 3 4 7 0
SECURITIES TRANSFER AGENTS MEDALLION PROGRAM'sm'
                                              SR


14 For More Information


<PAGE>

     employer,  including  its  consolidated  subsidiaries,  may be considered a
     single trust,  as may qualified plans of multiple  employers  registered in
     the name of a single bank trustee as one  account),  although more than one
     beneficiary is involved.

     Special  Retirement  Wrap  Program.  A program  sponsored by an  Authorized
     Institution showing one or more  characteristics  distinguishing it, in the
     opinion of Lord Abbett  Distributor  from a Mutual Fund Fee Based  Program.
     Such  characteristics  include,  among  other  things,  the  fact  that  an
     Authorized  Institution does not charge its clients any fee of a consulting
     or advisory nature that is economically  equivalent to the distribution fee
     under  the  Class A 12b-1  Plan and the fact that the  program  relates  to
     participant-directed Retirement Plans.


RECENT PERFORMANCE

     The following is a discussion of recent  performance  for the  twelve-month
     period ending December 31, 1999.

     The  fourth  quarter of 1999 was  difficult  for bond  investors.  The U.S.
     Federal Reserve Board (the "Fed") raised short-term  interest rates for the
     third consecutive  time,  reversing the three rate reductions that occurred
     in 1998.  As the economy  continued to exhibit  signs of strong  growth and
     record levels of employment,  investors  remained fearful that inflationary
     pressures could develop as a result of the continued  expansion of the U.S.
     economy.  While credit  spreads -- the difference in yield between bonds of
     the same maturity but different  quality -- did tighten some  (contracted),
     they continued to remain wide during the quarter.

     We spent the fourth  quarter  trying to reduce the risk of rising  interest
     rates by keeping  our  exposure  to  Treasurys  to a minimum  and  slightly
     increasing our allocation to  convertible  bonds -- securities  that can be
     exchanged for stock of the issuing  corporation at specified prices.  Since
     we anticipate  that the recovery in the global  economy will  continue,  we
     invested in some multinational  technology  manufacturing and semiconductor
     companies that we believe offered good value.

     Despite  challenging  market  conditions and a significant rise in interest
     rates  during  the past 15  months,  high-yield  bonds  were among the best
     performers in the U.S. bond market. We maintained an allocation of over 63%
     of the Fund to  high-yield  bonds as they  continued  to offer a tremendous
     yield  advantage over  Treasurys.  We also found good value in the bonds of
     technology, telecommunications,  media, and cable companies. Conversely, we
     were  disappointed  by the bonds of small  companies,  which struggled with
     less access to capital and increasing  default rates.  Investors  seemed to
     prefer the more liquid bonds of larger companies.

     Our  holdings  in  convertible   securities  also  helped  the  portfolio's
     performance.  On the heels of strong  corporate  earnings,  persistent U.S.
     economic growth and recent stock market  advances,  we took profits on some
     of the portfolio's  convertible securities that had increased significantly
     in price. We maintained a moderate exposure to mortgage-backed  securities,
     investing mainly in new,  higher-coupon FNMA bonds that were acquired below
     par (face value).

     We will continue to closely monitor the Fed for further rate increases.  We
     feel that  bonds  represent  an  excellent  value  given  today's  level of
     inflation, and should continue to be attractive if inflation remains in the
     area of 2% to 3%.  While  we do not  anticipate  a  meaningful  decline  in
     interest  rates  in the  short  term,  we  remain  encouraged  by  economic
     indicators such as low inflation and the U.S. Government budget surplus.


                                                         For More Information 15


<PAGE>

                                                           Financial Information

FINANCIAL HIGHLIGHTS
     This  table  describes  the  Fund's  performance  for  the  fiscal  periods
     indicated.  "Total return" shows how much your investment in the Fund would
     have  increased  (or  decreased)  during  each  period,  assuming  you  had
     reinvested all dividends and distributions. These Financial Highlights have
     been audited by Deloitte & Touche LLP, the Fund's independent  auditors, in
     conjunction  with their  annual audit of the Fund's  financial  statements.
     Financial  statements  for the fiscal year ended  December 31, 1999 and the
     Independent  Auditors'  Report  thereon  appear  in the  Annual  Report  to
     Shareholders  for  the  fiscal  year  ended  December  31,  1999,  and  are
     incorporated  by reference  into the Statement of  Additional  Information,
     which is available upon request.  Certain  information  reflects  financial
     results for a single fund share.

<TABLE>
<CAPTION>

====================================================================================================================================
                                                     Class A Shares                                 Class B Shares
- ------------------------------------------------------------------------------------------------------------------------------------
                                                 Year Ended December 31,                        Year Ended
December 31,
Per Share Operating Performance:      1999     1998      1997     1996      1995          1999     1998
1997      1996(d)

<S>                                   <C>      <C>      <C>       <C>      <C>           <C>       <C>
<C>      <C>
Net asset value, beginning of year    $9.45    $9.76    $9.41     $9.29    $8.71         $9.44     $9.75
$9.41    $9.13
- ------------------------------------------------------------------------------------------------------------------------------------
Income from investment operations
- ------------------------------------------------------------------------------------------------------------------------------------
 Net investment income                  .75(b)   .76(b)   .75(b)    .81      .85           .69(b)    .69(b)
 .68(b)   .34
- ------------------------------------------------------------------------------------------------------------------------------------
 Net realized and unrealized
   gain (loss) on investments and
   foreign currency transactions       (.40)    (.31)     .40       .17      .606         (.39)     (.31)
 .38      .26
- ------------------------------------------------------------------------------------------------------------------------------------
Total from investment operations        .35      .45     1.15       .98     1.456          .30       .38
1.06      .60
- ------------------------------------------------------------------------------------------------------------------------------------
Distributions
- ------------------------------------------------------------------------------------------------------------------------------------
 Dividends from net investment income  (.75)    (.76)    (.80)     (.86)    (.876)        (.69)     (.69)
(.72)    (.32)
- ------------------------------------------------------------------------------------------------------------------------------------
Net asset value, end of year          $9.05    $9.45    $9.76     $9.41    $9.29         $9.05     $9.44
$9.75    $9.41
- ------------------------------------------------------------------------------------------------------------------------------------
Total Return(a)                        3.91%    4.76%   12.70%    11.16%   17.50%         3.29%     3.98%
11.85%    6.57%(c)
- ------------------------------------------------------------------------------------------------------------------------------------
Ratios to Average Net Assets:
- ------------------------------------------------------------------------------------------------------------------------------------
 Expenses(e)                            .92%     .88%     .89%      .89%     .82%         1.60%     1.60%
1.63%     .70%(c)
- ------------------------------------------------------------------------------------------------------------------------------------
 Net investment income                 8.17%    7.85%    7.89%     8.77%    9.41%         7.49%     7.13%
7.06%    3.37%(c)
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

<TABLE>
<CAPTION>
                                                           Class C Shares                                Class P
Shares
                                                       Year Ended December 31,                       Year Ended
December 31,
Per Share Operating Performance:              1999        1998        1997      1996(d)
1999           1998(d)

<S>                                           <C>        <C>         <C>        <C>
<C>             <C>
Net asset value, beginning of year            $9.44      $9.77       $9.41      $9.05
$9.45           $9.54
- ------------------------------------------------------------------------------------------------------------------------------------
Income from investment operations
- ------------------------------------------------------------------------------------------------------------------------------------
 Net investment income                          .69(b)     .69(b)      .69(b)     .35
 .73(b)          .25(b)
- ------------------------------------------------------------------------------------------------------------------------------------
 Net realized and unrealized
  gain (loss) on investments and
  foreign currency transactions                (.40)      (.31)        .39        .33
(.39)           (.09)
- ------------------------------------------------------------------------------------------------------------------------------------
Total from investment operations                .29        .38        1.08        .68
 .34             .16
- ------------------------------------------------------------------------------------------------------------------------------------
Distributions
- ------------------------------------------------------------------------------------------------------------------------------------
 Dividends from net investment income          (.69)      (.69)       (.72)      (.32)
(.74)           (.25)
- ------------------------------------------------------------------------------------------------------------------------------------
Net asset value, end of year                  $9.06      $9.46       $9.77      $9.41
$9.05           $9.45
- ------------------------------------------------------------------------------------------------------------------------------------
Total Return(a)                                3.17%      3.98%      11.97%      7.86%(c)
3.86%           1.73%(c)
- ------------------------------------------------------------------------------------------------------------------------------------
Ratios to Average Net Assets:
- ------------------------------------------------------------------------------------------------------------------------------------
 Expenses(e)                                   1.60%      1.60%       1.58%       .75%(c)
1.05%            .38%(c)
- ------------------------------------------------------------------------------------------------------------------------------------
 Net investment Income                         7.49%      7.13%       7.16%      3.72%(c)
8.10%           2.90%(c)
</TABLE>

<TABLE>
<CAPTION>

- ------------------------------------------------------------------------------------------------------------------------------------
                                                                     Year Ended December 31,
- ------------------------------------------------------------------------------------------------------------------------------------


Supplemental Data For All Classes:       1999              1998                1997
1996              1995

<S>                                   <C>               <C>                 <C>
<C>               <C>
Net assets, end of year (000)         $3,777,623        $3,540,124          $2,866,184
$2,129,421        $1,339,508
- ------------------------------------------------------------------------------------------------------------------------------------
Portfolio turnover rate                 67.93%            86.48%              89.14%
106.79%           134.90%
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

(a)  Total  return does not  consider the effects of sales loads and assumes the
     reinvestment of all distributions.

(b)  Calculated using average shares outstanding during the period.

(c)  Not annualized.

(d)  Commencement  of operations for class shares:  B - August 1, 1996, C - July
     15, 1996 and P - August 21, 1998.

(e)  The  ratios  for 1998 and 1999  include  expenses  paid  through an expense
     offset arrangement.


16 Financial Information


<PAGE>

LINE GRAPH COMPARISON
     Immediately below is a comparison of a $10,000 investment in Class A shares
     to the same investment in the Lehman  Aggregate Bond Index,  Salomon Index,
     High-Yield  Index,  and Value  Line  Index,  assuming  reinvestment  of all
     dividends  and  distributions.  Although  the  Fund's  portfolio  blend has
     changed through the years,  historically it was composed primarily of three
     categories of securities: (1) high-yield corporate debt (including straight
     preferred stocks); (2) equity-related  securities; and (3) high-grade debt.
     Because no single index existed that combined these  categories in a manner
     similar to the Fund,  we compared the Fund's  performance  to that of three
     indices which included elements of the categories:  High Yield Index; Value
     Line Index;  and Salomon  Index.  The Fund now intends to replace the Value
     Line Index and the Salomon Index with the Lehman  Aggregate Bond Index. The
     Lehman Aggregate Bond Index is not only a broader based  securities  market
     index but is also more commonly used in fund  performance  comparisons  and
     more accessible to shareholders.

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

[GRAPHIC OMITTED]
               NAV       MAX       High Yield     Value Line     Salomon
12-31-89       10,000    9,525     10,000         10,000         10,000
12-31-90       9,243     8,805     9,362          8,686          10,909
12-31-91       12,787    12,180    13,458         11,228         12,651
12-31-92       14,832    14,128    15,702         13,618         13,611
12-31-93       17,201    16,385    18,671         16,532         14,957
12-31-94       16,536    15,751    18,492         15,884         14,531
12-31-95       19,430    18,508    21,710         20,185         17,226
12-31-96       21,598    20,572    24,404         23,463         17,850
13-31-97       24,339    23,184    27,481         27,700         19,571
12-31-98       25,499    24,288    27,638         26,230         21,277
12-31-99       26,494    25,236    28,545         31,345         21,099
================================================================================
             Average Annual Total Return At Maximum Applicable
           Sales Charge For The Periods Ending December 31, 1999

                       1 Year           5 Years        10 Years (or Life)
- --------------------------------------------------------------------------------
Class A(3)            -1.00%             8.83%               9.70%
- --------------------------------------------------------------------------------
Class B(4)            -1.51%               -                 6.76%
- --------------------------------------------------------------------------------
Class C(5)             2.21%               -                 7.76%
- --------------------------------------------------------------------------------
Class P(6)             3.86%               -                 4.12%
- --------------------------------------------------------------------------------


(1)  Reflects the deduction of the maximum initial sales charge of 4.75%.
(2)  Performance for the unmanaged Lehman Aggregate Bond Index (source:  Lipper,
     Inc.), Salomon Index (source: Chase Global Data Service),  High-Yield Index
     (source: Callan Associates),  and Value Line Index (source: Morgan Stanley)
     does not reflect any fees or expenses.
(3)  Represents  total  return  which is the  percent  change  in  value,  after
     deduction of the maximum initial sales charge of 4.75%  applicable to Class
     A shares,  with all dividends and distributions  reinvested for the periods
     shown ending  December 31, 1999 using the  SEC-required  uniform  method to
     compute such return.
(4)  The Class B shares commenced operations on 8/1/96. Performance reflects the
     deduction  of a CDSC of 5% (for  one  year)  and 3%  (for  the  life of the
     class).
(5)  The Class C shares commenced  operations on 7/15/96.  Performance  reflects
     the  deduction  of a CDSC of 1% (for one  year) and 0% (for the life of the
     class).
(6)  The Class P shares  were first  offered on 8/21/98.  Performance  is at net
     asset value.


                                                        Financial Information 17


<PAGE>

Compensation for your dealer

<TABLE>
<CAPTION>
====================================================================================================================================
                                              First Year Compensation

                                     Front-end
                                     sales charge           Dealer's
                                     paid by investors      concession             Service fee(1)        Total
compensation(2)
Class A investments                  (% of offering price)  (% of offering price)  (% of net investment) (% of
offering price)
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                      <C>                     <C>                   <C>
<C>
Less than $100,000                       4.75%                   4.00%                 0.25%
4.24%
- ------------------------------------------------------------------------------------------------------------------------------------
$100,000 - $249,999                      3.95%                   3.25%                 0.25%
3.49%
- ------------------------------------------------------------------------------------------------------------------------------------
$250,000 - $499,999                      2.75%                   2.25%                 0.25%
2.74%
- ------------------------------------------------------------------------------------------------------------------------------------
$500,000 - $999,999                      1.95%                   1.75%                 0.25%
2.00%
- ------------------------------------------------------------------------------------------------------------------------------------
$1 million or more(3) or Retirement Plan - 100 or more
eligible  employees(3) or Special Retirement Wrap Program(3)
- ------------------------------------------------------------------------------------------------------------------------------------
First $5 million                 no front-end sales charge       1.00%                 0.25%
1.25%
- ------------------------------------------------------------------------------------------------------------------------------------
Next $5 million above that       no front-end sales charge       0.55%                 0.25%
0.80%
- ------------------------------------------------------------------------------------------------------------------------------------
Next $40 million above that      no front-end sales charge       0.50%                 0.25%
0.75%
- ------------------------------------------------------------------------------------------------------------------------------------
Over $50 million                 no front-end sales charge       0.25%                 0.25%
0.50%
- ------------------------------------------------------------------------------------------------------------------------------------
Class B investments                                               Paid at time of sale (% of net asset value)
- ------------------------------------------------------------------------------------------------------------------------------------
All amounts                      no front-end sales charge       3.75%                 0.25%
4.00%
- ------------------------------------------------------------------------------------------------------------------------------------
Class C investments
- ------------------------------------------------------------------------------------------------------------------------------------
All amounts                      no front-end sales charge       0.75%                 0.25%
1.00%
- ------------------------------------------------------------------------------------------------------------------------------------
Class P investments                                               Percentage of average net assets
- ------------------------------------------------------------------------------------------------------------------------------------
All amounts                      no front-end sales charge       0.25%                 0.20%
0.45%
- ------------------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------------------
                                       Annual Compensation After first Year

Class A investments                                                    Percentage of average net assets(5)
- ------------------------------------------------------------------------------------------------------------------------------------
All amounts                      no front-end sales charge       none                  0.25%
0.25%
- ------------------------------------------------------------------------------------------------------------------------------------
Class B investments(4)
- ------------------------------------------------------------------------------------------------------------------------------------
All amounts                      no front-end sales charge       none                  0.25%
0.25%
- ------------------------------------------------------------------------------------------------------------------------------------
Class C investments(4)
- ------------------------------------------------------------------------------------------------------------------------------------
All amounts                      no front-end sales charge       0.65%                 0.25%
0.90%
- ------------------------------------------------------------------------------------------------------------------------------------
Class P investments
- ------------------------------------------------------------------------------------------------------------------------------------
All amounts                      no front-end sales charge       0.25%                 0.20%
0.45%
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

(1)  The service fee for Class A and P shares is paid  quarterly and for Class A
     shares may not exceed 0.15% if sold prior to June 1, 1990. The first year's
     service fee on Class B and C shares is paid at the time of sale.

(2)  Reallowance/concession   percentages   and  service  fee   percentages  are
     calculated  from  different  amounts,  and  therefore  may not equal  total
     compensation  percentages  if combined  using simple  addition.  Additional
     Concessions  may be paid to Authorized  Institutions,  such as your dealer,
     from time to time.

(3)  Concessions  are paid at the time of sale on all Class A shares sold during
     any  12-month  period  starting  from the day of the first net asset  value
     sale.  With  respect to (a) Class A share  purchases at $1 million or more,
     sales  qualifying at such level under rights of accumulation  and statement
     of intention  privileges are included and (b) for Special  Retirement  Wrap
     Programs,  only new  sales are  eligible  and  exchanges  into the Fund are
     excluded.Certain purchases of Class A shares are subject to a CDSC.

(4)  Class B and C shares are subject to CDSCs.

(5)  With  respect  to  Class  B,  C and  P  shares,  0.25%,  0.90%  and  0.45%,
     respectively,  of the  average  annual  net  asset  value  of  such  shares
     outstanding during the quarter (including distribution  reinvestment shares
     after  the  first  anniversary  of their  issuance)  is paid to  Authorized
     Institutions,  such as your  dealer.  These  fees  are  paid  quarterly  in
     arrears. In the case of C shares for fixed-income  portfolios,  such as the
     Fund,  0.10% of the  average  annual  net  asset  value of such  shares  is
     retained  by Lord Abbett  Distributor,  thus  reducing  from 0.75% to 0.65%
     after the first year. Lord Abbett  Distributor uses this 0.10% for expenses
     primarily intended to result in the sale of such Fund's shares.


18 Financial Information

<PAGE>

     More information on the Fund is available free upon request,  including the
     following:

ANNUAL/SEMI-ANNUAL REPORT
     Describes the Fund, lists portfolio holdings and contains a letter from the
     Fund's  manager   discussing   recent  market  conditions  and  the  Fund's
     investment strategies.

STATEMENT OF ADDITIONAL INFORMATION ("SAI")
     Provides more details about the Fund and its policies.  A current SAI is on
     file  with  the   Securities  and  Exchange   Commission   ("SEC")  and  is
     incorporated by reference (is legally considered part of this prospectus).

     Lord Abbett Bond-Debenture Fund, Inc.
     90 Hudson Street
     Jersey City, NJ 07302-3973
     --------------------------
     SEC file number: 811-2145


To obtain information:

By telephone.  Call the Fund at:
800-426-1130

By mail.  Write to the Fund at:
The Lord Abbett Family of Funds
90 Hudson Street
Jersey City, NJ 07302-3973

Via the Internet.
Lord, Abbett & Co.
www.lordabbett.com
Text only versions of Fund documents can be viewed online or downloaded from:
SEC
www.sec.gov

You can also  obtain  copies by  visiting  the SEC's  Public  Reference  Room in
Washington, DC (phone 202-942-8090) or by sending your request and a duplicating
fee to the SEC's Public  Reference  Section,  Washington,  DC  20549-6009  or by
sending your request electronically to [email protected].



LABDF-1-500
(5/00)


<PAGE>

<PAGE>

LORD ABBETT


Statement of Additional Information                                 May 1, 2000


                                   Lord Abbett
                                 Bond-Debenture
                                   Fund, Inc.
- --------------------------------------------------------------------------------


This Statement of Additional  Information is not a Prospectus.  A Prospectus may
be obtained  from your  securities  dealer or from Lord Abbett  Distributor  LLC
("Lord  Abbett  Distributor")  at 90 Hudson  Street,  Jersey  City,  New Jersey,
07302-3973.  This Statement  relates to, and should be read in conjunction with,
the Prospectus dated May 1, 2000.

Shareholder  inquiries  should  be made by  directly  contacting  the Fund or by
calling   800-821-5129.   The  Annual  Report  to   Shareholders  is  available,
withoutcharge,  upon request by calling that number.  In addition,  you can make
inquiries through your dealer.



                TABLE OF CONTENTS                                  Page

        1.       Investment Policies                                  2
        2.       Directors and Officers                               4
        3.       Investment Advisory and Other Services               7
        4.       Portfolio Transactions                               8
        5.       Purchases, Redemptions and
                 Shareholder Services                                 9
        6.       Performance                                         17
        7.       Taxes                                               18
        8.       Information About the Fund                          19
        9.       Financial Statements                                20
        10.      Appendix                                            20


                                       1
<PAGE>

                                       1.
                               Investment Policies



The Lord Abbett  Bond-Debenture  Fund,  Inc. (the  "Company" or the "Fund") is a
diversified   open-end  investment   management  company  registered  under  the
Investment Company Act of 1940, as amended (the "Act").


Fundamental  Investment  Restrictions.  The  Fund is  subject  to the  following
investment restrictions,  which cannot be changed without approval of a majority
of the Fund's outstanding shares.

The Fund may not:


(1)           borrow  money,  except that (i) the Fund may borrow from banks (as
              defined in the Act) in  amounts up to 33 1/3% of its total  assets
              (including the amount borrowed), (ii) the Fund may borrow up to an
              additional  5% of its total assets for temporary  purposes,  (iii)
              the Fund may obtain such short-term credit as may be necessary for
              the clearance of purchases and sales of portfolio  securities  and
              (iv) the Fund may  purchase  securities  on margin  to the  extent
              permitted by applicable law;

(2)           pledge  its assets  (other  than to secure  borrowings,  or to the
              extent permitted by the Fund's investment policies as permitted by
              applicable law);

(3)           engage in the  underwriting  of securities,  except  pursuant to a
              merger or  acquisition  or to the extent that, in connection  with
              the disposition of its portfolio  securities,  it may be deemed to
              be an underwriter under federal securities laws;

(4)           make loans to other persons, except that the acquisition of bonds,
              debentures or other  corporate  debt  securities and investment in
              government    obligations,    commercial    paper,    pass-through
              instruments,   certificates  of  deposit,   bankers   acceptances,
              repurchase  agreements  or any  similar  instruments  shall not be
              subject to this  limitation,  and except further that the Fund may
              lend  its  portfolio  securities,  provided  that the  lending  of
              portfolio   securities  may  be  made  only  in  accordance   with
              applicable law;

(5)           buy or sell  real  estate  (except  that the Fund  may  invest  in
              securities  directly  or  indirectly  secured  by real  estate  or
              interests  therein  or issued by  companies  which  invest in real
              estate or interests therein) or commodities or commodity contracts
              (except  to the  extent  the  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);

(6)           with  respect  to  75% of  the  gross  assets  of  the  Fund,  buy
              securities  of one  issuer  representing  more  than (i) 5% of the
              Fund's gross assets, except securities issued or guaranteed by the
              U.S.  Government,  its agencies or  instrumentalities  or (ii) own
              more than 10% of the voting securities of such issuer;

(7)           invest more than 25% of its assets,  taken at market value, in the
              securities  of  issuers  in  any  particular  industry  (excluding
              securities   of   the   U.S.   Government,    its   agencies   and
              instrumentalities); or

(8)           issue senior  securities to the extent such issuance would violate
              applicable law.


Compliance  with the investment  restrictions in this Section will be determined
at the time of purchase or sale of the portfolio investment.


Non-Fundamental  Investment  Restrictions.  In addition  to the  policies in the
Prospectus and the investment restrictions above which cannot be changed without
shareholder  approval,  the Fund is  subject  to the  following  non-fundamental
investment  policies  which may be  changed  by the Board of  Directors  without
shareholder approval.


                                       2
<PAGE>

The Fund may not:

(1)           borrow in excess of 33 1/3% of its  total  assets  (including  the
              amount  borrowed),  and  then  only  as a  temporary  measure  for
              extraordinary or emergency purposes;

(2)           make short sales of securities or maintain a short position except
              to the extent permitted by applicable law;

(3)           invest  knowingly  more than 15% of its net assets (at the time of
              investment)   in  illiquid   securities,   except  for  securities
              qualifying  for resale  under Rule 144A of the  Securities  Act of
              1933, deemed to be liquid by the Board of Directors;

(4)           invest in the securities of other  investment  companies except as
              permitted by applicable law;

(5)           invest in securities of issuers  which,  with their  predecessors,
              have a record of less than three years' continuous operations,  if
              more than 5% of the Fund's  total assets would be 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);

(6)           hold  securities  of any  issuer  if  more  than  1/2 of 1% of the
              securities  of such issuer are owned  beneficially  by one or more
              officers or  directors  of the Fund or by one or more  partners or
              members of the Fund's  underwriter or investment  adviser if these
              owners  in the  aggregate  own  beneficially  more  than 5% of the
              securities of such issuer;

(7)           invest  in  warrants  if,  at the  time  of the  acquisition,  its
              investment  in  warrants,  valued at the lower of cost or  market,
              would exceed 5% of the Fund's total assets  (included  within such
              limitation,  but not to exceed 2% of the Fund's total assets,  are
              warrants  which are not listed on the New York or  American  Stock
              Exchange or a major foreign exchange);

(8)           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 other development activities;

(9)           write,  purchase  or  sell  puts,  calls,  straddles,  spreads  or
              combinations thereof, except to the extent permitted in the Fund's
              prospectus and statement of additional information, as they may be
              amended from time to time;

(10)          buy from or sell to any of its officers, directors,  employees, or
              its investment adviser or any of its officers, directors, partners
              or  employees,  any  securities  other  than  shares of the Fund's
              common stock; or

(11)          invest  more than 10% of the market  value of its gross  assets at
              the time of investment in debt securities  which are in default as
              to interest or principal.

Although it has no current  intention to do so, the Fund may invest in financial
futures and options on financial futures.


                                       3
<PAGE>


Portfolio  Turnover  Rate.  For the year ended  December 31, 1999, our portfolio
turnover was 67.93% versus 86.48% for the prior year.




                                       2.
                             Directors and Officers


The Board of  Directors of the Fund is  responsible  for the  management  of the
business and affairs of the Fund.

The following  director is a partner of Lord,  Abbett & Co. ("Lord Abbett"),  90
Hudson Street,  Jersey City, New Jersey 07302-3973.  He has been associated with
Lord Abbett for over five years and is also an officer  ,director  or trustee of
the thirteen other Lord Abbett-sponsored funds.

*Robert S. Dow, age 55, Chairman and President
*Mr. Dow is an "interested person" as defined in the Act.


The following outside directors are also directors or trustees of thirteen other
Lord Abbett-sponsored funds referred to above.


E. Thayer Bigelow, Director
245 Park Avenue, Suite 2414
New York, New York

Senior Adviser, Time Warner Inc. (since 1998). Formerly,  Acting Chief Executive
Officer of Courtroom Television Network.  (1997-1998).  Formerly,  President and
Chief  Executive  Officer of Time Warner Cable  Programming,  Inc.  (1991-1997).
Prior to that, President and Chief Operating Officer of Home Box Office. Age 58.


William H. T. Bush, Director
Bush-O'Donnell & Co., Inc.
101 South Hanley Road, Suite 1025
St. Louis, Missouri.


Co-founder   and   Chairman  of  the  Board  of  financial   advisory   firm  of
Bush-O'Donnell & Company (since 1986). Age 61.


Robert B. Calhoun, Jr., Director
Monitor Clipper Partners
650 Madison Avenue, 9th Floor
New York, New York


Managing  Director of Monitor Clipper Partners (since 1997) and President of The
Clipper Group L.P., both private equity investment funds (since 1990). Age 57.


Stewart S. Dixon, Director
Wildman, Harrold, Allen & Dixon
225 W. Wacker Drive (Suite 2800)
Chicago, Illinois


                                       4
<PAGE>

Partner in the law firm of Wildman, Harrold, Allen & Dixon (since 1990). Age 69.


John C. Jansing, Director
162 S. Beach Road
Hobe Sound, Florida


Retired. Former Chairman of Independent Election Corporation of America, a proxy
tabulating firm. Age 74.

C. Alan MacDonald, Director
415 Round Hill Road
Greenwich, Connecticut

Currently involved in golf development  management on a consultancy basis (since
1999).  Formerly,  Manging Director of The Directorship,  Inc., a consultancy in
board  management and corporate  governance  (1997-1999).  Prior to that General
Partner of The Marketing Partnership,  Inc., a full service marketing consulting
firm  (1994 - 1997).  Prior to that,  Chairman  and Chief  Executive  Officer of
Lincoln Snacks,  Inc.,  manufacturer  of branded snack foods (1992 - 1994).  His
career  spans 36 years at  Stouffers  and Nestle  with  eighteen of the years as
Chief Executive Officer.  Currently serves as Director of DenAmerica Corp., J.B.
Williams Company, Inc., Fountainhead Water Company and Exigent Diagnostics.  Age
66.


Hansel B. Millican, Jr., Director
Rochester Button Company
1328 Broadway (Suite 816)
New York, New York


President and Chief Executive  Officer of Rochester Button Company (since 1991).
Currently serves as Director of Polyvision. Age 71.


Thomas J. Neff, Director
Spencer Stuart
277 Park Avenue
New York, New York


Chairman of Spencer Stuart,  an executive  search  consulting firm (since 1976).
Currently serves as Director of Ace, Ltd. (NYSE). Age 62.

The second column of the following table sets forth the compensation  accrued by
the  Company  for  outside  directors/trustees.  The  third  column  sets  forth
information  with respect to the pension or retirement  benefits  accrued by all
Lord Abbett-sponsored  funds for outside  directors/trustees.  The fourth column
sets forth the total compensation paid by all Lord Abbett-sponsored funds to the
outside  directors/trustees,  and amounts  payable but deferred at the option of
the  director/trustee,  but does not  include  amounts  accrued  under the third
column.  No  director/trustee  of the Funds  associated  with Lord Abbett and no
officer of the Funds  received any  compensation  from the Funds for acting as a
director/trustee or officer.



                                       5
<PAGE>


<TABLE>
<CAPTION>
                   For the Fiscal Year Ended December 31, 1999
                   -------------------------------------------

         (1)                              (2)                 (3)                       (4)

                                                          Pension or                 For Year Ended
                                                          Retirement Benefits        December 31, 1999
                                                          Accrued by the             Total Compensation
                                      Aggregate           Fund and                   Paid by the Fund and
                                      Compensation        Thirteen Other Lord        Thirteen Other Lord
                                      Accrued by          Abbett-sponsored           Abbett-sponsored
Name of Director                      the Fund(1)         Funds(2)                   Funds3
- --------------------------           -----------         --------------------        ---------------------
<S>                                     <C>                  <C>                        <C>
E. Thayer Bigelow                       $9,812               $17,622                    $57,720
William H. T. Bush                      $9,860               $15,846                    $58,000
Robert B. Calhoun Jr.                   $9,690               $12,276                    $57,000
Stewart S. Dixon                        $9,945               $32,420                    $58,500
John C. Jansing                         $9,733               $41,1084                   $57,250
C. Alan MacDonald                       $9,775               $26,763                    $57,500
Hansel B. Millican, Jr.                 $9,775               $37,822                    $57,500
Thomas J. Neff                          $10,142              $20,313                    $59,660


</TABLE>



1. Outside  directors'/trustees'  fees,  including attendance fees for board and
   committee meetings, are allocated among all Lord Abbett-sponsored funds based
   on the net assets of each Fund.  A portion of the fees payable by the Fund to
   its outside  directors/trustees  may be deferred under a plan  ("equity-based
   plan") that deems the  deferred  amounts to be invested in shares of the Fund
   for  later  distribution  to  the  directors/trustees.  The  amounts  of  the
   aggregate   compensation   payable  by  the  Fund  in  accordance   with  the
   equity-based  plan as of December  31, 1999 deemed  invested in Fund  shares,
   including  dividends  reinvested and changes in net asset value applicable to
   such deemed  investments were: Mr. Bigelow,  $52,221;  Mr. Bush,  $3,066, Mr.
   Calhoun,  $18,862, Mr. Dixon, $68,618, Mr. Jansing,  $114,482, Mr. MacDonald,
   $71,365, Mr. Millican, $156,454 and Mr. Neff, $138,617. If the amounts deemed
   invested in Fund shares were added to each director's actual holdings of Fund
   shares as of December 31, 1999,  each  would own, the following: Mr. Bigelow,
   $316,415, Mr. Bush, $3,066, Mr. Calhoun, $18,862, Mr. Dixon, $73,647,
   Mr. Jansing, $121,747, Mr. MacDonald, $627,452, Mr. Millican, $679,742,
   and Mr. Neff, $143,609.


2. The amounts in Column 3 were accrued by the Lord  Abbett-sponsored  funds for
   the twelve months ended October 31, 1999.

3. This column shows aggregate compensation,  including directors/trustees' fees
   and attendance fees for board and committee meetings, of a nature referred to
   in footnote one, accrued by the Lord  Abbett-sponsored  funds during the year
   ended December 31, 1999,  including fees  directors/trustees'  have chosen to
   defer but does not include  amounts  accrued  under the equity based plan and
   shown in Column 3.

4. The equity-based plans superseded a previously  approved  retirement plan for
   all  directors/trustees.  Directors/trustees  had the option to convert their
   accrued  benefits  under the  retirement  plan.  All of the  current  outside
   directors/trustees  except one made such an election.  Mr.  Jansing  chose to
   continue to receive  benefits under the retirement  plan, which provides that
   outside  directors/trustees  may receive annual retirement  benefits for life
   equal to their final annual retainer following  retirement at or after age 72
   with at least ten years of service.  Thus, if Mr.  Jansing were to retire and
   the annual  retainer  payable  by the funds were the same as it is today,  he
   would receive annual retirement benefits of $50,000.

Except where indicated,  the following  executive officers of the Fund have been
associated with Lord Abbett for over five years. Messrs. Brown, Carper, Hilstad,
Morris,  Towle and Walsh are partners of Lord Abbett;  the others are employees.
None have received compensation from the Funds.


                                       6
<PAGE>

Executive Vice President:


Christopher Towle, age 42


Vice Presidents:


Thomas J. Baade, age 35 (with Lord Abbett since 1998,  formerly a credit analyst
with Greenwich Street Advisors)

Zane E. Brown, age 48

Joan A. Binstock,  age 46 (with Lord Abbett since 1999, formerly Chief Operating
Officer of Morgan Grenfell from 1996 to 1999, prior thereto Principal of Ernst &
Young LLP)

Daniel E. Carper, age 48

Michael S. Goldstein, age 31 (with Lord Abbett since 1997 - formerly involved in
Fixed Income trading and analysis at BEA Associated and Portfolio  Administrator
for The Chase Manhattan Bank)

Paul A. Hilstad,  age 57, Vice  President and Secretary  (with Lord Abbett since
1995;  formerly  Senior Vice President and General  Counsel of American  Capital
Management & Research, Inc.)

Lawrence  H.  Kaplan,  age 43 (with  Lord  Abbett  since  1997 -  formerly  Vice
President and Chief Counsel of Salomon  Brothers Asset Management Inc. from 1995
to 1997; prior thereto,  Senior Vice President,  Director and General Counsel of
Kidder Peabody Asset Management, Inc.)

Robert G. Morris, age 55

A. Edward Oberhaus III, age 40

Tracie E. Richter,  age 31 (with Lord Abbett since 1999, formerly Vice President
- - head of Fund  Administration  of  Morgan  Grenfell  from  1998 to  1999,  Vice
President of Bankers  Trust from 1996 to 1998,  prior  thereto tax  associate of
Goldman Sachs).

Richard S. Szaro, age 57


Treasurer:


Donna M. McManus, age 39 (with Lord Abbett since 1996, formerly a Senior Manager
at Deloitte & Touche LLP)

As of April 15, 2000, the Fund's officers and directors,  as a group, owned less
than 1% of the Fund's  outstanding shares and there were no record holders of 5%
or more of the Fund's outstanding shares.




                                       3.
                     Investment Advisory and Other Services


As described under  "Management"  in the  Prospectus,  Lord Abbett is the Fund's
investment  manager.  The following general partners of Lord Abbett are officers
and/or  directors of the Fund: Zane E. Brown,  Daniel E. Carper,  Robert S. Dow,
Paul A. Hilstad, Robert G. Morris, and Christopher Towle.

The other  general  partners  are:  Stephen I. Allen,  John E. Erard,  Robert P.
Fetch, Daria L. Foster, Robert I. Gerber, W. Thomas Hudson, Stephen J. McGruder,
Michael B. McLaughlin,  Robert J. Noelke,  R. Mark Pennington and John J. Walsh.
The  address  of each  partner  is 90 Hudson  Street,  Jersey  City,  New Jersey
07302-3973.



                                       7
<PAGE>

The services  performed by Lord Abbett are  described  in the  Prospectus  under
"Management." Under the Management Agreement,  the Fund is obligated to pay Lord
Abbett a monthly fee,  based on its average daily net assets for each month,  at
the  annual  rate of .50 of 1% of the first $500  million  of average  daily net
assets and .45% of 1% of assets over $500 million.  This fee is allocated  among
the classes based on the proportionate  shares of such average daily net assets.
For the fiscal years ended December 31, 1999, 1998 and 1997, the management fees
paid to Lord  Abbett  amounted to  $17,075,989,  $14,835,355,  and  $11,621,344,
respectively.

We pay all expenses not  expressly  assumed by Lord Abbett,  including,  without
limitation,  12b-1 expenses,  outside directors' fees and expenses,  association
membership  dues,  legal  and  auditing  fees,  taxes,   transfer  and  dividend
disbursing  agent  fees,  shareholder  servicing  costs,  expenses  relating  to
shareholder  meetings,  expenses  of  preparing,   printing  and  mailing  stock
certificates and shareholder  reports,  expenses of registering our shares under
federal and state securities laws,  expenses of preparing,  printing and mailing
prospectuses to existing shareholders,  insurance premiums,  brokerage and other
expenses connected with executing portfolio transactions.


Lord Abbett  Distributor LLC, a New York limited liability company ("Lord Abbett
Distributor"),  and a subsidiary of Lord Abbett, 90 Hudson Street,  Jersey City,
New Jersey 07302, serves as the principal underwriter for the Funds.


The Bank of New York ("BNY"),  48 Wall Street, New York, New York, is the Fund's
custodian.  In  accordance  with the  requirements  of Rule  17f-5,  the  Fund's
directors  have approved  arrangements  permitting the Fund's foreign assets not
held by BNY or its  foreign  branches  to be held by certain  qualified  foreign
banks and depositories.

Deloitte & Touche LLP, Two World Financial Center,  New York, New York 10281 are
the  independent  auditors of the Fund and must be approved at least annually by
our Board of  Directors  to  continue  in such  capacity.  Deloitte & Touche LLP
perform  audit  services for the Fund,  including the  examination  of financial
statements included in our Annual Report to Shareholders.


United  Missouri  Bank of Kansas  City,  N.A.,  Tenth and  Grand,  Kansas  City,
Missouri, acts as the transfer agent and dividend disbursing agent for the Fund.




                                       4.
                             Portfolio Transactions

Our policy is to obtain best execution on all our portfolio transactions,  which
means that we seek to have purchases and sales of portfolio  securities executed
at the most favorable prices, considering all costs of the transaction including
brokerage  commissions  and dealer markups and markdowns and taking into account
the full range and quality of the brokers'  services.  Consistent with obtaining
best execution,  the Fund may pay, as described below, a higher  commission than
some  brokers  might  charge on the same  transaction.  This policy  governs the
selection  of  brokers or dealers  and the  market in which the  transaction  is
executed.  To the extent  permitted by law, we may, if considered  advantageous,
make a purchase from or sale to another Lord  Abbett-sponsored  fund without the
intervention of any broker-dealer.

Broker-dealers  are selected on the basis of their  professional  capability and
the value and quality of their brokerage and research  services.  Normally,  the
selection is made by traders who are officers of the Fund and also are employees
of Lord  Abbett.  These  traders do the  trading as well for other  accounts  --
investment  companies  (of which they are also  officers)  and other  investment
clients -- managed by Lord  Abbett.  They are  responsible  for  obtaining  best
execution.

We pay a  commission  rate  that we  believe  is  appropriate  to  give  maximum
assurance that our brokers will provide us, on a continuing  basis,  the highest
level of brokerage  services  available.  While we do not always seek the lowest
possible  commissions on particular trades, we believe that our commission rates
are in line with the rates that many other  institutions  pay.  Our  traders are
authorized  to pay brokerage  commissions  in excess of those that other brokers
might  accept  on the  same  transactions  in  recognition  of the  value of the
services  performed  by the  executing  brokers,  viewed in terms of either  the
particular  transaction  or the  overall  responsibilities  of Lord  Abbett with
respect to us and the other


                                       8
<PAGE>


accounts they manage.  Such services  include  showing us trading  opportunities
including  blocks,  a willingness  and ability to take  positions in securities,
knowledge  of a  particular  security  or  market,  proven  ability  to handle a
particular type of trade, confidential treatment, promptness and reliability.

Some of our brokers  also provide  research  services at least some of which are
useful to Lord Abbett in their overall  responsibilities  with respect to us and
the other accounts they manage. Research includes the furnishing of analyses and
reports concerning issuers, industries, securities, economic factors and trends,
portfolio  strategy and the  performance  of accounts and trading  equipment and
computer software  packages,  acquired from third-party  suppliers,  that enable
Lord Abbett to access various information  databases.  Such services may be used
by Lord Abbett in servicing  all their  accounts,  and not all of such  services
will  necessarily be used by Lord Abbett in connection with their  management of
the Fund;  conversely,  such services  furnished in connection with brokerage on
other  accounts  managed  by Lord  Abbett may be used in  connection  with their
management of the Fund; and not all of such services will necessarily be used by
Lord Abbett in connection  with their advisory  services to such other accounts.
We have been advised by Lord Abbett that research services received from brokers
cannot be allocated to any  particular  account,  are not a substitute  for Lord
Abbett's  services but are  supplemental  to their own research effort and, when
utilized,  are subject to internal  analysis  before being  incorporated by Lord
Abbett into their investment  process.  As a practical  matter,  it would not be
possible for Lord Abbett to generate all of the information  presently  provided
by brokers.  While  receipt of research  services from  brokerage  firms has not
reduced Lord Abbett's  normal research  activities,  the expenses of Lord Abbett
could be  materially  increased  if it  attempted  to generate  such  additional
information  through its own staff and  purchased  such  equipment  and software
packages  directly from the  suppliers.  No  commitments  are made regarding the
allocation of brokerage  business to or among  brokers,  and trades are executed
only when they are dictated by  investment  decisions of the Fund to purchase or
sell portfolio securities.

If two or more  broker-dealers are considered capable of offering the equivalent
likelihood of best execution,  the  broker-dealer who has sold our shares and/or
shares of other  Lord  Abbett-sponsored  funds may be  preferred.  When,  in the
opinion of the  investment  adviser,  two or more  brokers  (either  directly or
through  their  correspondent  clearing  agents) are in a position to obtain the
best  price and  execution,  preference  may be given to  brokers  who have sold
shares of a Fund or who have provided investment research, statistical, or other
related services to the investment adviser.

If other  clients of Lord Abbett buy or sell the same  security at the same time
as we do, transactions will, to the extent  practicable,  be allocated among all
participating  accounts  in  proportion  to the amount of each order and will be
executed  daily until filled so that each account  shares the average  price and
commission  cost of each day.  Other  clients  who direct  that their  brokerage
business be placed with  specific  brokers or who invest  through wrap  accounts
introduced to Lord Abbett by certain brokers may not participate  with us in the
buying and selling of the same  securities as described  above. If these clients
wish to buy or sell the same security as we do, they may have their transactions
executed at times different from our  transactions  and thus may not receive the
same price or incur the same commission cost as we do.

During the fiscal years ending  December 31, 1999,  1998 and 1997, the Fund paid
total  commissions  to  independent   broker-dealers  of  $57,555, $121,122 and
$105,776.



                                       5.
                             Purchases, Redemptions
                            and Shareholder Services

Information  concerning  how we value our shares for the purchase and redemption
of  our  shares  is  contained  in  the   Prospectus   under   "Purchases"   and
"Redemptions," respectively.

As disclosed in the Prospectus, we calculate our net asset value as of the close
of the New York Stock  Exchange  ("NYSE")  on each day that the NYSE is open for
trading by dividing our total net assets by the number of shares  outstanding at
the time of  calculation.  The NYSE is closed on  Saturdays  and Sundays and the
following  holidays -- New Year's Day, Martin Luther King, Jr. Day,  Presidents'
Day, Good Friday,  Memorial Day,  Independence Day, Labor Day,  Thanksgiving and
Christmas.


                                       9
<PAGE>

The Fund values its portfolio  securities at market value as of the close of the
NYSE. Market value will be determined as follows:  securities listed or admitted
to trading  privileges  on the New York or  American  Stock  Exchange  or on the
NASDAQ National  Market System are valued at the last sales price,  or, if there
is no sale on that day, at the mean between the last bid and asked  prices,  or,
in the case of bonds, in the over-the-counter  market if, in the judgment of the
Fund's  officers,  that market more accurately  reflects the market value of the
bonds.  Over-the-counter  securities  not traded on the NASDAQ  National  Market
System are valued at the mean between the last bid and asked prices.  Securities
for which market  quotations  are not  available are valued at fair market value
under procedures approved by the Board of Directors.

For each class of shares the net asset  value will be  determined  by taking the
net asset value and dividing by the shares outstanding.

The maximum  offering  price of Class A shares on December 31, 1999 was computed
as follows:

                                                      Class A
                                                      -------
Net asset value per share (net assets divided
by shares outstanding)                                 $9.05

Maximum offering price per share (net asset
value divided by .9525)                                $9.50

The Fund has entered into a distribution  agreement with Lord Abbett Distributor
under which Lord Abbett Distributor is obligated to use its best efforts to find
purchasers  for the shares of the Fund, and to make  reasonable  efforts to sell
the shares so long as, in Lord  Abbett  Distributor's  judgment,  a  substantial
distribution can be obtained by reasonable efforts.

For  the  last  three  fiscal  years  Lord  Abbett,   as  the  Fund's  principal
underwriter,  received net commissions after allowance of a portion of the sales
charge to independent dealers with respect to Class A shares as follows:

Year Ended December 31,
                                     1999             1998            1997
                                     ----             ----            ----
Gross sales charge                $13,010,094     $17,440,941     $12,867,756
Amount allowed to dealers         $11,144,269     $14,988,816     $11,119,368
                                  -----------     -----------     -----------

Net commissions
received by Lord Abbett           $  1,865,825    $ 2,452,125     $ 1,748,388
                                  ============    ===========     ===========

Conversion  of Class B Shares.  The  conversion  of Class B shares on the eighth
anniversary  of their purchase is subject to the  continuing  availability  of a
private  letter  ruling  from the  Internal  Revenue  Service,  or an opinion of
counsel or tax adviser, to the effect that the conversion of Class B shares does
not  constitute a taxable event for the holder under Federal  income tax law. If
such  a  revenue  ruling  or  opinion  is no  longer  available,  the  automatic
conversion  feature may be suspended,  in which event no further  conversions of
Class B shares would occur while such  suspension  remained in effect.  Although
Class B shares  could  then be  exchanged  for  Class A shares  on the  basis of
relative net asset value of the two classes,  without the  imposition of a sales
charge or fee, such exchange could constitute a taxable event for the holder.

ALTERNATIVE SALES ARRANGEMENTS

Classes of Shares.  The Fund offers investors five different  classes of shares.
This Prospectus offers four of those classes designated Class A, B, C and P. The
different  classes of shares  represent  investments  in the same  portfolio  of


                                       10
<PAGE>

securities but are subject to different  expenses and will likely have different
share prices.  Investors  should read this section  carefully to determine which
class represents the best investment option for their particular situation.

Class A Shares.  If you buy Class A shares,  you pay an initial  sales charge on
investments  of less than $1 million (or on investments  for  employer-sponsored
retirement  plans under the Internal  Revenue Code  (hereinafter  referred to as
"Retirement Plans") with less than 100 eligible employees or on investments that
do not  qualify to be under a "special  retirement  wrap  program"  as a program
sponsored  by an  authorized  institution  showing  one or more  characteristics
distinguishing it, in the opinion of Lord Abbett Distributor, from a mutual fund
wrap fee program.  If you purchase Class A shares as part of an investment of at
least $1 million (or for Retirement  Plans with at least 100 eligible  employees
or under a  special  retirement  wrap  program)  in  shares  of one or more Lord
Abbett-sponsored  funds,  you will not pay an initial sales  charge,  but if you
redeem  any of those  shares  within 24 months  after the month in which you buy
them, you may pay to the Fund a contingent  deferred sales charge ("CDSC") of 1%
except for redemptions under a special  retirement wrap program.  Class A shares
are subject to service and  distribution  fees that are  currently  estimated to
total  annually  approximately  0.28 of 1% of the annual net asset  value of the
Class A shares. The initial sales charge rates, the CDSC and the Rule 12b-1 plan
applicable to the Class A shares are described below.

Class B Shares.  If you buy Class B shares,  you pay no sales charge at the time
of  purchase,  but if you redeem your  shares  before the sixth  anniversary  of
buying them, you will normally pay a CDSC to Lord Abbett  Distributor LLC ("Lord
Abbett  Distributor").  That CDSC varies  depending  on how long you own shares.
Class B shares are subject to service and distribution fees at an annual rate of
1% of the  annual net asset  value of the Class B shares.  The CDSC and the Rule
12b-1 plan  applicable  to the Class B shares are  described in "Buying  Class B
Shares" below.

Class C Shares.  If you buy Class C shares,  you pay no sales charge at the time
of  purchase,  but if you redeem your  shares  before the first  anniversary  of
buying  them,  you will  normally  pay the Fund a CDSC of 1%. Class C shares are
subject to service and  distribution  fees at an annual rate of 1% of the annual
net  asset  value of the  Class C  shares.  The CDSC  and the  Rule  12b-1  plan
applicable to the C shares are described in "Buying Class C Shares" below.

Class P Shares.  If you buy Class P shares,  you pay no sales charge at the time
of purchase,  and if you redeem your shares you pay no CDSC.  Class P shares are
subject to service and  distribution  fees at an annual rate of .45 of 1% of the
average  daily  net  asset  value of the Class P  shares.  The Rule  12b-1  plan
applicable  to the Class P shares is  described  in "Class P Rule  12b-1  Plan."
Class P shares are available to a limited number of investors.

Which  Class of Shares  Should You  Choose?  Once you decide that the Fund is an
appropriate  investment  for you,  the  decision  as to which class of shares is
better  suited to your needs  depends  on a number of  factors  which you should
discuss with your financial adviser. The Fund's class-specific  expenses and the
effect of the different  types of sales charges on your  investment  will affect
your investment  results over time. The most important  factors are how much you
plan to invest and how long you plan to hold your investment.  If your goals and
objectives  change over time and you plan to  purchase  additional  shares,  you
should  re-evaluate those factors to see if you should consider another class of
shares.

In the following discussion, to help provide you and your financial adviser with
a framework in which to choose a class,  we have made some  assumptions  using a
hypothetical  investment  in the Fund. We used the sales charge rates that apply
to Class  A,  Class B and  Class C, and  considered  the  effect  of the  higher
distribution  fees on Class B and  Class C  expenses  (which  will  affect  your
investment  return). Of course, the actual performance of your investment cannot
be predicted and will vary, based on the Fund's actual investment  returns,  the
operating  expenses  borne by each class of shares,  and the class of shares you
purchase.  The factors briefly discussed below are not intended to be investment
advice,  guidelines  or  recommendations,   because  each  investor's  financial
considerations are different. The discussion below of the factors to consider in
purchasing a particular  class of shares assumes that you will purchase only one
class of shares and not a combination of shares of different classes.

How Long Do You Expect to Hold Your  Investment?  While future  financial  needs
cannot be  predicted  with


                                       11
<PAGE>

certainty,  knowing how long you expect to hold your  investment will assist you
in  selecting  the  appropriate  class of shares.  For example,  over time,  the
reduced  sales  charges  available  for larger  purchases  of Class A shares may
offset the effect of paying an initial sales charge on your investment, compared
to the effect over time of higher class-specific  expenses on Class B or Class C
shares  for which no  initial  sales  charge is paid.  Because  of the effect of
class-based  expenses,  your  choice  should also depend on how much you plan to
invest.

Investing for the Short Term. If you have a short-term  investment horizon (that
is,  you plan to hold your  shares  for not more  than six  years),  you  should
probably  consider  purchasing  Class A or Class C shares  rather  than  Class B
shares.  This is because of the effect of the Class B CDSC if you redeem  before
the sixth  anniversary  of your  purchase,  as well as the effect of the Class B
distribution  fee on the  investment  return for that  class in the short  term.
Class C shares might be the  appropriate  choice  (especially for investments of
less than $100,000), because there is no initial sales charge on Class C shares,
and the CDSC does not apply to amounts you redeem after holding them one year.

However,  if you plan to invest more than $100,000 for the short term,  then the
more you invest and the more your investment horizon increases toward six years,
the more  attractive  the Class A share  option may become.  This is because the
annual  distribution  fee on Class C shares  will have a greater  impact on your
account over the longer term than the reduced  front-end sales charge  available
for  larger  purchases  of Class A shares.  For  example,  Class A might be more
appropriate  than Class C for  investments of more than $100,000  expected to be
held for 5 or 6 years (or more).  For investments  over $250,000  expected to be
held 4 to 6 years (or more),  Class A shares may become  more  appropriate  than
Class  C. If you are  investing  $500,000  or  more,  Class  A may  become  more
desirable as your investment horizon approaches 3 years or more.

For most investors who invest $1 million or more or for Retirement Plans with at
least 100 eligible employees or for investments pursuant to a special retirement
wrap program, in most cases Class A shares will be the most advantageous choice,
no matter how long you intend to hold your shares.  For that reason,  it may not
be suitable for you to place a purchase  order for Class B shares of $500,000 or
more or a purchase  order for Class C shares of $1,000,000 or more. In addition,
it may not be  suitable  for you to place an order for Class B or C shares for a
Retirement Plan with at least 100 eligible employees or for a special retirement
wrap program. You should discuss this with your financial advisor.

Investing  for the Longer Term.  If you are  investing  for the longer term (for
example,  to provide  for future  college  expenses  for your  child) and do not
expect to need access to your money for seven years or more,  Class B shares may
be an appropriate  investment  option, if you plan to invest less than $100,000.
If you plan to invest more than $100,000 over the long term, Class A shares will
likely be more  advantageous than Class B shares or Class C shares, as discussed
above,  because of the effect of the expected  lower expenses for Class A shares
and the reduced initial sales charges available for larger  investments in Class
A shares under the Fund's Rights of Accumulation.
Of course,  these examples are based on  approximations of the effect of current
sales charges and expenses on a  hypothetical  investment  over time, and should
not be relied on as rigid guidelines.

Are There  Differences  in Account  Features  That Matter to You?  Some  account
features  are  available  in whole or in part to  Class A,  Class B and  Class C
shareholders.  Other features (such as Systematic Withdrawal Plans) might not be
advisable in non-Retirement  Plan accounts for Class B shareholders  (because of
the effect of the CDSC on the entire  amount of a  withdrawal  if it exceeds 12%
annually) and in any account for Class C  shareholders  during the first year of
share  ownership  (due  to the  CDSC  on  withdrawals  during  that  year).  See
"Systematic  Withdrawal Plan" under "Shareholder Services" in the Prospectus for
more  information  about the 12% annual waiver of the CDSC. You should carefully
review how you plan to use your  investment  account before deciding which class
of shares you buy. For  example,  the  dividends  payable to Class B and Class C
shareholders  will be  reduced  by the  expenses  borne  solely by each of these
classes, such as the higher distribution fee to which Class B and Class C shares
are subject, as described below.

How Does It Affect Payments to My Broker?  A salesperson,  such as a broker,  or
any other person who is entitled


                                       12
<PAGE>

to  receive   compensation  for  selling  Fund  shares  may  receive   different
compensation  for selling one class than for selling another class. As discussed
in more detail below, such compensation is primarily paid at the time of sale in
the case of Class A and B shares and is paid over time, so long as shares remain
outstanding,  in the case of Class C  shares.  It is  important  that  investors
understand  that the primary  purpose of the CDSC for the Class B shares and the
distribution  fee for Class B and Class C shares is the same as the  purpose  of
the front-end sales charge on sales of Class A shares: to compensate brokers and
other persons selling such shares. The CDSC, if payable, supplements the Class B
distribution  fee and reduces the Class C distribution fee expenses for the Fund
and Class C shareholders.

Rule 12b-1 Plans

Class A, B, C and P. As  described  in the  Prospectus,  the Fund has  adopted a
Distribution  Plan and  Agreement  pursuant to Rule 12b-1 of the Act for each of
the  Fund  Classes:  the "A  Plan",  the  "B  Plan"  , "C  Plan"  and "P  Plan",
respectively.  In adopting each Plan and in approving its continuance, the Board
of Directors has concluded that there is a reasonable  likelihood that each Plan
will benefit its respective Class and these Classes's shareholders. The expected
benefits  include  greater sales and lower  redemptions  of Class shares,  which
should allow each Class to maintain a consistent cash flow, and a higher quality
of service to  shareholders by authorized  institutions  than would otherwise be
the case.  During the last fiscal  year,  the Fund  accrued or paid through Lord
Abbett to  authorized  institutions  $ 7,628,106  under the A Plan,  $ 7,803,829
under the B Plan,  $5,534,946  under the C Plan and $443 under the P Plan.  Lord
Abbett used all amounts received under each Plan for payments to dealers for (i)
providing  continuous  services to shareholders,  such as answering  shareholder
inquiries,   maintaining   records,   and  assisting   shareholders   in  making
redemptions,  transfers,  additional  purchases  and  exchanges  and (ii)  their
assistance in distributing shares of the Fund.

Each Plan  requires  the  directors  to review,  on a quarterly  basis,  written
reports of all amounts expended  pursuant to the Plan and the purposes for which
such  expenditures  were made.  Each Plan shall  continue  in effect only if its
continuance is specifically approved at least annually by vote of the directors,
including a majority of the directors who are not interested persons of the Fund
and who have no direct or indirect  financial  interest in the  operation of the
Plan or in any  agreements  related to the Plan ("outside  directors"),  cast in
person at a meeting called for the purpose of voting on the Plan. No Plan may be
amended to  increase  materially  above the limits set forth  therein the amount
spent for distribution expenses thereunder without approval by a majority of the
outstanding  voting  securities  of the  applicable  class and the approval of a
majority of the directors,  including a majority of the outside directors.  Each
Plan  may be  terminated  at any  time  by  vote of a  majority  of the  outside
directors or by vote of a majority of its Class's outstanding voting securities.

Contingent  Deferred Sales Charges. A Contingent  Deferred Sales Charge ("CDSC")
(i) applies  regardless of class, (ii) will not apply to shares purchased by the
reinvestment of dividends or capital gains distributions; (iii) will be assessed
on the lesser of the net asset value of the shares at the time of  redemption or
the original  purchase  price and (iv) will not be imposed on the amount of your
account  value  represented  by the increase in net asset value over the initial
purchase price  (including  increases due to the  reinvestment  of dividends and
capital gains distributions) and upon early redemption of shares. In the case of
Class A shares,  this  increase is  represented  by shares  having an  aggregate
dollar value in your account. In the case of Class B and C shares, this increase
is  represented  by that  percentage of each share  redeemed where the net asset
value exceeded the initial purchase price.

Class A Shares. As stated in the Prospectus,  subject to certain  exceptions,  a
CDSC of 1% is imposed with respect to those Class A shares (or Class A shares of
another Lord  Abbett-sponsored  fund or series acquired through exchange of such
shares) on which the Fund has paid the one-time  distribution  fee of 1% if such
shares are  redeemed out of the Lord  Abbett-sponsored  family of funds within a
period  of 24  months  from  the end of the  month in which  the  original  sale
occurred.

Class B Shares. As stated in the Prospectus,  subject to certain exceptions,  if
Class B shares  (or  Class B shares of  another  Lord  Abbett-sponsored  fund or
series  acquired  through  exchange of such shares) are redeemed out of the Lord
Abbett-sponsored  family of funds for cash before the sixth anniversary of their
purchase, a CDSC will be deducted from the redemption proceeds. The Class B CDSC
is paid to Lord Abbett  Distributor  to reimburse its  expenses,  in whole or in
part, for providing  distribution-related service to the Fund in connection with
the sale of Class B shares.


                                       13
<PAGE>

To determine  whether the CDSC applies to a redemption,  the Fund redeems shares
in the following  order:  (1) shares  acquired by  reinvestment of dividends and
capital gains  distributions,  (2) shares held on or after the sixth anniversary
of  their  purchase,   and  (3)  shares  held  the  longest  before  such  sixth
anniversary.

The amount of the contingent  deferred sales charge will depend on the number of
years since you invested and the dollar amount being redeemed,  according to the
following schedule:

<TABLE>
<CAPTION>
Anniversary of the Day on                            Contingent Deferred Sales Charge
Which the Purchase Order Was Accepted                on Redemptions (As % of Amount Subject to Charge)
<S>                                                  <C>
Before the 1st                                       5.0%
On the 1st, before the 2nd                           4.0%
On the 2nd, before the 3rd                           3.0%
On the 3rd, before the 4th                           3.0%
On the 4th, before the 5th                           2.0%
On the 5th, before the 6th                           1.0%
On or after the 6th anniversary                      None
</TABLE>

In the table, an  "anniversary" is the same calendar day in each respective year
after the date of purchase.  For example, the anniversaries for shares purchased
on May 1 will be May 1 of each succeeding year.

Class C Shares. As stated in the Prospectus,  subject to certain exceptions,  if
Class C shares  are  redeemed  for cash  before the first  anniversary  of their
purchase,  the  redeeming  shareholder  will be  required  to pay to the Fund on
behalf of Class C shares a CDSC of 1% of the lower of cost or the then net asset
value of Class C shares  redeemed.  If such shares are  exchanged  into the same
class of another Lord Abbett-sponsored fund and subsequently redeemed before the
first  anniversary of their original  purchase,  the charge will be collected by
the other fund on behalf of this Fund's Class C shares.

General.  The  percentage (1% in the case of Class A and C shares and 5% through
1% in the case of Class B shares) used to calculate  CDSCs  described  above for
the Class A, Class B and Class C shares is sometimes  hereinafter referred to as
the "Applicable Percentage."

Class P Shares. If you buy Class P shares, you pay no sales chare at the time of
purchase,  and if you redeem  your  shares  you pay no CDSC.  Class P shares are
subject to service and  distribution  fees at an annual rate of .45 of 1% of the
average  daily  net  asset  value of the Class P  shares.  The Rule  12b-1  Plan
applicable  to the Class P shares is  described  in "Class P Rule  12b-1  Plan".
Class P shares are available to a limited number of investors.

With respect to Class A and Class B shares, no CDSC is payable on redemptions by
participants or beneficiaries from employer-sponsored retirement plans under the
Internal  Revenue  Code  for  benefit  payments  due  to  plan  loans,  hardship
withdrawals,  death,  retirement or  separation  from service and for returns of
excess contributions to retirement plan sponsors. With respect to Class A shares
purchased pursuant to a special  retirement wrap program,  no CDSC is payable on
redemptions  which continue as investments in another fund  participating in the
program.  With respect to Class B shares, no CDSC is payable for redemptions (i)
in connection with Systematic Withdrawal Plan and Div-Move services as described
below under those headings, (ii) in connection with mandatory distribution under
403(b) plans and IRAs and (iii) in connection with death of the shareholder.  In
the case of Class A and Class C shares,  the CDSC is received by the Fund and is
intended  to  reimburse  all or a portion of the amount  paid by the Fund if the
shares are  redeemed  before  the Fund has had an  opportunity  to  realize  the
anticipated  benefits of having a long-term  shareholder account in the Fund. In
the case of Class B shares,  the CDSC is received by Lord Abbett Distributor and
is intended to reimburse its expenses of providing  distribution-related service
to the Fund (including recoupment of the commission payments made) in connection
with the  sale of  Class B shares  before  Lord  Abbett  Distributor  has had an
opportunity to realize its anticipated  reimbursement by having such a long-term
shareholder account subject to the B Plan distribution fee.


                                       14
<PAGE>

The other funds and series which participate in the Telephone Exchange Privilege
(except (a) Lord Abbett U.S.  Government  Securities  Money  Market  Fund,  Inc.
("GSMMF"),  (b)  certain  series of Lord  Abbett  Tax-Free  Income Fund and Lord
Abbett  Tax-Free  Income Trust for which a Rule 12b-1 Plan is not yet in effect,
and (c) any authorized  institution's  affiliated  money market fund  satisfying
Lord  Abbett  Distributor  as to certain  omnibus  account  and other  criteria,
hereinafter  referred  to  as  an  "authorized  money  market  fund"  or  "AMMF"
(collectively,  the "Non-12b-1  Funds") have instituted a CDSC for each class on
the same terms and conditions.  No CDSC will be charged on an exchange of shares
of the same class between Lord Abbett funds or between such funds and AMMF. Upon
redemption of shares out of the Lord Abbett family of funds or out of AMMF,  the
CDSC  will be  charged  on  behalf  of and  paid:  (i) to the fund in which  the
original purchase  (subject to a CDSC) occurred,  in the case of the Class A and
Class C shares and (ii) to Lord Abbett  Distributor if the original purchase was
subject to a CDSC, in the case of the Class B shares.  Thus, if shares of a Lord
Abbett fund are  exchanged for shares of the same class of another such fund and
the shares of the same class  tendered  ("Exchanged  Shares")  are  subject to a
CDSC,  the CDSC will carry over to the shares of the same class being  acquired,
including GSMMF and AMMF ("Acquired  Shares").  Any CDSC that is carried over to
Acquired  Shares is calculated as if the holder of the Acquired  Shares had held
those shares from the date on which he or she became the holder of the Exchanged
Shares.  Although the Non-12b-1  Funds will not pay a distribution  fee on their
own shares, and will, therefore,  not impose their own CDSC, the Non-12b-1 Funds
will collect the CDSC (a) on behalf of other Lord Abbett  funds,  in the case of
the Class A and Class C shares and (b) on behalf of Lord Abbett Distributor,  in
the case of the Class B shares. Acquired Shares held in GSMMF and AMMF which are
subject to a CDSC will be  credited  with the time such shares are held in GSMMF
but will not be credited with the time such shares are held in AMMF.  Therefore,
if your Acquired Shares held in AMMF qualified for no CDSC or a lower Applicable
Percentage at the time of exchange into AMMF,  that  Applicable  Percentage will
apply to  redemptions  for cash from AMMF,  regardless of the time you have held
Acquired Shares in AMMF.

In no event will the amount of the CDSC exceed the Applicable  Percentage of the
lesser of (i) the net asset value of the shares  redeemed  or (ii) the  original
cost of such  shares (or of the  Exchanged  Shares for which  such  shares  were
acquired).  No CDSC  will be  imposed  when  the  investor  redeems  (i)  shares
representing an aggregate dollar amount of your account,  in the case of Class A
shares, (ii) that percentage of each share redeemed,  in the case of Class B and
C shares, derived from increases in the value of the shares above the total cost
of shares being redeemed due to increases in net asset value,  (iii) shares with
respect to which no Lord  Abbett fund paid a 12b-1 fee and, in the case of Class
B shares, Lord Abbett Distributor paid no sales charge or service fee (including
shares  acquired  through  reinvestment  of dividend  income and  capital  gains
distributions) or (iv) shares which,  together with Exchanged Shares,  have been
held  continuously for 24 months from the end of the month in which the original
sale  occurred  (in the case of Class A  shares);  for six years or more (in the
case  of  Class B  shares)  and for one  year or more  (in the  case of  Class C
shares). In determining whether a CDSC is payable, (a) shares not subject to the
CDSC will be redeemed  before  shares  subject to the CDSC and (b) of the shares
subject to a CDSC, those held the longest will be the first to be redeemed.

Exchanges.  The Prospectus briefly describes the Telephone  Exchange  Privilege.
You may  exchange  some or all of your shares of any class for those in the same
class of: (i) Lord Abbett-sponsored funds currently offered to the public with a
sales charge  (front-end,  back-end or level ), (ii) GSMMF or (iii) AMMF, to the
extent  offers  and  sales  may be made in  your  state.  You  should  read  the
prospectus of the other fund before exchanging. In establishing a new account by
exchange, shares of the Fund being exchanged must have a value equal to at least
the  minimum  initial  investment  required  for the other  fund into  which the
exchange is made.

Shareholders in other Lord  Abbett-sponsored  funds and AMMF have the same right
to  exchange  their  shares for the  corresponding  class of the Fund's  shares.
Exchanges  are based on relative  net asset values on the day  instructions  are
received by the Fund in Kansas City if the  instructions  are received  prior to
the close of the NYSE in proper form. No sales charges are imposed except in the
case of  exchanges  out of  GSMMF or AMMF  (unless  a sales  charge  (front-end,
back-end or level) was paid on the initial investment in a Lord Abbett-sponsored
fund).  Exercise of the exchange privilege will be treated as a sale for federal
income tax purposes, and, depending on the circumstances,  a gain or loss may be
recognized. In the case of an exchange of shares that have been held for 90 days
or less where no sales charge is payable on the  exchange,  the  original  sales
charge incurred with respect to the exchanged  shares will be taken into account
in  determining  gain or loss on the  exchange  only to the extent  such  charge
exceeds the sales charge that would


                                       15
<PAGE>

have been payable on the acquired  shares had they been acquired for cash rather
than by  exchange.  The portion of the  original  sales charge not so taken into
account will increase the basis of the acquired shares.

Shareholders have the exchange  privilege unless they refuse it in writing.  You
should  not view the  exchange  privilege  as a means for  taking  advantage  of
short-term swings in the market,  and we reserve the right to terminate or limit
the privilege of any shareholder who makes frequent exchanges.  We can revoke or
modify the privilege for all shareholders upon 60 days' prior notice.  "Eligible
Funds" are AMMF and other Lord Abbett-sponsored funds which are eligible for the
exchange  privilege,  except Lord Abbett Series Fund  ("LASF")  which offers its
shares only in connection with certain variable annuity  contracts,  Lord Abbett
Equity Fund ("LAEF") which is not issuing  shares.  The exchange  privilege will
not be available  with respect to any otherwise  "Eligible  Funds" the shares of
which are not available to new investors of the type requesting the exchange.

Letter of Intention. Under the terms of the Letter of Intention, as described in
the Prospectus you may invest  $100,000 or more over a 13-month period in shares
of a Lord  Abbett-sponsored  fund (other than  shares of LAEF,  LASF,  GSMMF and
AMMF,  unless holdings in GSMMF and AMMF are  attributable  to shares  exchanged
from a Lord  Abbett-sponsored
fund offered with a front-end,  back-end or level
sales charge). Shares currently owned by you are credited as purchases (at their
current  offering  prices on the date the Statement is signed) toward  achieving
the stated investment and reduced initial sales charge for Class A shares. Class
A shares  valued at 5% of the amount of intended  purchases are escrowed and may
be redeemed to cover the  additional  sales charge  payable if the Letter is not
completed.  The Letter of  Intention is neither a binding  obligation  on you to
buy, nor on the Fund to sell, the full amount indicated.

Rights of Accumulation.  As stated in the Prospectus,  purchasers (as defined in
the Prospectus) may accumulate their investment in Lord  Abbett-sponsored  funds
(other than LAEF,  LASF,  GSMMF,  and AMMF unless  holdings in GSMMF or AMMF are
attributable to shares exchanged from a Lord  Abbett-sponsored fund offered with
a front-end,  back-end or level sales charge) so that a current investment, plus
the purchaser's  holdings valued at the current maximum offering price,  reach a
level eligible for a discounted sales charge for Class A shares.

Net Asset Value Purchases of Class A Shares. Our Class A shares may be purchased
at net asset value by our directors,  employees of Lord Abbett, employees of our
shareholder  servicing  agent and  employees of any  securities  dealer having a
sales  agreement  with Lord  Abbett who  consents  to such  purchases  or by the
director  or  custodian  under any  pension  or  profit-sharing  plan or Payroll
Deduction IRA  established for the benefit of such persons or for the benefit of
employees of any national  securities  trade  organization  to which Lord Abbett
belongs or any company with an  account(s)  in excess of $10 million  managed by
Lord Abbett on a private-advisory-account basis. For purposes of this paragraph,
the terms "directors" and "employees"  include a director's or employee's spouse
(including the surviving spouse of a deceased  director or employee).  The terms
"our  directors" and "employees of Lord Abbett" also include  retired  directors
and employees and other family members thereof.

Our Class A shares also may be purchased at net asset value (a) at $1 million or
more,  (b) with  dividends and  distributions  from Class A shares of other Lord
Abbett-sponsored  funds, except for LAEF and LASF, (c) under the loan feature of
the Lord Abbett-sponsored prototype 403(b) plan for share purchases representing
the  repayment of principal  and interest,  (d) by certain  authorized  brokers,
dealers, registered investment advisers or other financial institutions who have
entered  into an  agreement  with Lord Abbett  Distributor  in  accordance  with
certain standards approved by Lord Abbett  Distributor,  providing  specifically
for the use of our shares in particular investment products made available for a
fee to clients of such  brokers,  dealers,  registered  investment  advisers and
other  financial  institutions,   ("mutual  fund  wrap  fee  program"),  (e)  by
employees,  partners and owners of unaffiliated consultants and advisors to Lord
Abbett,  Lord Abbett Distributor or Lord  Abbett-sponsored  funds who consent to
such  purchase  if such  persons  provide  service to Lord  Abbett,  Lord Abbett
Distributor  or such  funds on a  continuing  basis and are  familiar  with such
funds, (f) through Retirement Plans with at least 100 eligible employees, (g) in
connection  with a merger,  acquisition  or other  reorganization  (h) through a
"special retirement wrap program" sponsored by an authorized  institution having
one or more  characteristics  distinguishing  it, in the  opinion of Lord Abbett
Distributor,  from a mutual fund wrap  program.  Such  characteristics  include,
among other things, the fact that an authorized  institution does not charge its
clients  any  fee of a  consulting  or  advisory  nature  that  is  economically
equivalent  to the  distribution  fee under Class A 12b-1 Plan and the fact


                                       16
<PAGE>

that the program relates to  participant-directed  Retirement  Plan.  Shares are
offered at net asset  value to these  investors  for the  purpose  of  promoting
goodwill with employees and others with whom Lord Abbett  Distributor and/or the
Fund has business relationships.

Redemptions.  A  redemption  order is in proper form when it contains all of the
information and  documentation  required by the order form or  supplementally by
Lord Abbett Distributor or the Fund to carry out the order. The signature(s) and
any legal capacity of the signer(s) must be guaranteed by an eligible guarantor.
See the Prospectus for expedited redemption procedures.

The right to redeem and receive payment, as described in the Prospectus,  may be
suspended if the NYSE is closed  (except for  weekends or  customary  holidays),
trading on the NYSE is  restricted  or the  Securities  and Exchange  Commission
deems an emergency to exist.

Our Board of  Directors  may  authorize  redemption  of all of the shares in any
account  in which  there are  fewer  than 25  shares.  Before  authorizing  such
redemption, the Board must determine that it is in our economic best interest or
necessary  to  reduce   disproportionately   burdensome  expenses  in  servicing
shareholder  accounts.  At least 6 months'  prior  written  notice will be given
before any such redemption,  during which time shareholders may avoid redemption
by bringing their accounts up to the minimum set by the Board.

Div-Move. Under the Div-Move service described in the Prospectus, you can invest
the dividends paid on your account of any class into an existing  account of the
same class in any other  Eligible Fund. The account must be either your account,
a joint account for you and your spouse, a single account for your spouse,  or a
custodial  account for your minor child under the age of 21. You should read the
prospectus of the other fund before investing.

Invest-A-Matic.  The  Invest-A-Matic  method of investing in the Fund and/or any
other  Eligible Fund is described in the  Prospectus.  To avail yourself of this
method you must complete the application form,  selecting the time and amount of
your bank checking account  withdrawals and the funds for investment,  include a
voided, unsigned check and complete the bank authorization.

Systematic  Withdrawal  Plans.  The Systematic  Withdrawal  Plan ("SWP") also is
described  in the  Prospectus.  You may  establish  a SWP if you own or purchase
uncertificated shares having a current offering price value of at least $10,000.
Lord Abbett  prototype  retirement  plans have no such minimum.  With respect to
Class B shares the CDSC will be waived on  redemptions  of up to 12% per year of
the current net asset value of your account at the time the SWP is  established.
For  Class B share  redemptions  over 12% per year,  the CDSC will  apply to the
entire  redemption.  Therefore,  please  contact  the  Fund  for  assistance  in
minimizing the CDSC in this situation.  With respect to Class C shares, the CDSC
will be waived on and after the first  anniversary  of their  purchase.  The SWP
involves  the  planned  redemption  of shares on a periodic  basis by  receiving
either  fixed or  variable  amounts at  periodic  intervals.  Since the value of
shares  redeemed  may be more or  less  than  their  cost,  gain or loss  may be
recognized for income tax purposes on each periodic payment.  Normally,  you may
not make  regular  investments  at the same  time you are  receiving  systematic
withdrawal  payments because it is not in your interest to pay a sales charge on
new  investments  when in  effect  a  portion  of that  new  investment  is soon
withdrawn.  The minimum investment accepted while a withdrawal plan is in effect
is  $1,000.  The SWP may be  terminated  by you or by us at any time by  written
notice.

Retirement  Plans.  The Prospectus  indicates the types of retirement  plans for
which Lord Abbett provides forms and  explanations.  Lord Abbett makes available
the retirement  plan forms including  401(k) plans and custodial  agreements for
IRAs (Individual Retirement Accounts, including Traditional, Education, Roth and
SIMPLE  IRAs and  Simplified  Employee  Pensions),  403(b)  plans and  qualified
pension and  profit-sharing  plans.  The forms name  Investors  Fiduciary  Trust
Company as custodian and contain specific  information about the plans excluding
401(k) plans.  Explanations of the eligibility  requirements,  annual  custodial
fees and  allowable tax  advantages  and penalties are set forth in the relevant
plan  documents.  Adoption of any of these plans should be on the advice of your
legal counsel or qualified tax adviser.


                                       17
<PAGE>

                                       6.
                                   Performance

The Fund computes the average  annual  compounded  rate of total return for each
class during specified  periods that would equate the initial amount invested to
the ending  redeemable  value of such  investment  by adding one to the computed
average  annual total return,  raising the sum to a power equal to the number of
years  covered by the  computation  and  multiplying  the result by one thousand
dollars which  represents a hypothetical  initial  investment.  The  calculation
assumes  deduction  of the  maximum  sales  charge  (as  described  in the  next
paragraph) from the amount invested and reinvestment of all income dividends and
capital gains  distributions on the reinvestment  dates at prices  calculated as
stated in the Prospectus.  The ending redeemable value is determined by assuming
a complete  redemption  at the end of the period  covered by the average  annual
total return computation.

In  calculating  total  returns for Class A shares,  the current  maximum  sales
charge of 4.75% (as a  percentage  of the offering  price) is deducted  from the
initial  investment (unless the return is shown at net asset value). For Class B
shares,  the payment of the applicable CDSC (5.0% prior to the first anniversary
of purchase, 4.0% prior to the second anniversary of purchase, 3.0% prior to the
third and fourth anniversaries of purchase,  2.0% prior to the fifth anniversary
of purchase,  1.0% prior to the sixth anniversary of purchase and no CDSC on and
after the sixth  anniversary  of purchase)  is applied to the Fund's  investment
result for that class for the time  period  shown  (unless  the total  return is
shown at net asset value).  For Class C shares,  the 1.0% CDSC is applied to the
Fund's  investment  result for that class for the time period shown prior to the
first  anniversary  of purchase  (unless the total  return is shown at net asset
value).  Total  returns  also  assume  that  all  dividends  and  capital  gains
distributions during the period are reinvested at net asset value per share, and
that the investment is redeemed at the end of the period.

Using the computation described above, the following table indicates the average
annual  compounded  rates of total  return for each class of shares of the Fund,
for the one year, five years,  ten years,  or since inception where  applicable.
Past performance is not indicative of future results.


<TABLE>
<CAPTION>
                                                                                Since
                           1Year            5 Year            10Year            Inception
                           -----            ------            ------            ---------
<S>                        <C>              <C>               <C>               <C>
Bond-Debenture Fund
Class A shares             -1.00%           8.83%             9.70%             -
Class B shares             -1.51%           -                 -                 6.76%
Class C shares              2.21%           -                 -                 7.76%
Class P shares              3.86%           -                 -                 4.12%
</TABLE>


Yield  quotation for each Class is based on a 30-day period ended on a specified
date, computed by dividing our net investment income per share earned during the
period by the maximum  offering price per share of such Class on the last day of
the period.  This is  determined  by finding the  following  quotient:  take the
Class'  dividends  and  interest  earned  during the period  minus its  expenses
accrued for the period and divide by the product of (i) the average daily number
of shares of such Class  outstanding  during the period  that were  entitled  to
receive dividends and (ii) the maximum offering price per share of such Class on
the last day of the period.  To this quotient add one. This sum is multiplied by
itself  five  times.   Then  one  is   subtracted   from  the  product  of  this
multiplication  and the remainder is  multiplied  by two.  Yield for the Class A
shares reflects the deduction of the maximum initial sales charge,  but may also
be shown based on the Fund's net asset value per share. Yields for Class B and C
shares do not reflect the deduction of the CDSC.


For the 30-day period ended December 31, 1999, the yield for  the Class A, B and
C shares of the Fund were: 7.32%, 7.03% and 7.03%, respectively.

These figures represent past  performance,  and an investor should be aware that
the investment return and principal value of a Fund investment will fluctuate so
that an investor's shares,  when redeemed,  may be worth more or less than their
original cost.  Therefore,  there is no assurance that this  performance will be
repeated in the future.


                                       18
<PAGE>

                                       7.
                                      Taxes


The Fund  intends to elect and to qualify  for special  tax  treatment  afforded
regulated  investment  companies  under the  Internal  Revenue Code of 1986 (the
"Code").  If it so  qualifies,  the  Fund  (but  not its  shareholders)  will be
relieved of federal income taxes on the amount it  distributes to  shareholders.
If in any  taxable  year the Fund does not  qualify  as a  regulated  investment
company,  all of its  taxable  income  will be  taxed  to the  Fund  at  regular
corporate rates.

The  Fund  contemplates  declaring  as  dividends  substantially  all of its net
investment  income.  Dividends paid by the Fund from its  investment  income and
distributions  out of short-term  capital gains are taxable to  shareholders  as
ordinary  income  from  dividends,  whether  received in cash or  reinvested  in
additional  shares  of the  Fund.  Distributions  paid  by the  Fund  of its net
realized  long-term  capital gains are taxable to  shareholders as capital gain,
also whether  received in cash or reinvested in shares.  The Fund will send each
shareholder  annual  information  concerning  the tax treatment of dividends and
other distributions.

Upon sale,  exchange or  redemption  of shares of the Fund, a  shareholder  will
recognize  short-  or  long-term  capital  gain  or  loss,  depending  upon  the
shareholder's  holding period in the Fund's shares.  However, if a shareholder's
holding  period in his shares is six months or less,  any capital loss  realized
from a sale or exchange of such shares must be treated as long-term capital loss
to the extent of dividends classified as "capital gains dividends" received with
respect to such shares.  The maximum tax rates  applicable  to net capital gains
recognized by individuals and other non-corporate  taxpayers are (i) the same as
ordinary  income rates for capital assets held for one year or less and (ii) 20%
for  capital  assets  held  for more  than one  year.  Capital  gains or  losses
recognized by corporate  shareholders  are subject to tax at the ordinary income
tax rates applicable to corporations.

Losses on the sale of shares are not deductible if, within a period beginning 30
days  before the date of the sale and ending 30 days after the date of the sale,
the taxpayer acquires shares that are substantially identical.

Some  shareholders  may  be  subject  to a 31%  withholding  tax  on  reportable
dividends,   capital  gains   distributions  and  redemption  payments  ("backup
withholding").  Generally,  shareholders  subject to backup  withholding will be
those for whom a certified  taxpayer  identification  number is not on file with
the Fund or who, to the Fund's  knowledge,  have furnished an incorrect  number.
When  establishing  an account,  an investor  must  certify  under  penalties of
perjury  that such  number is correct  and that he is not  otherwise  subject to
backup withholding.

The writing of call options and other investment  techniques and practices which
the Fund may utilize may affect the character and timing of the  recognition  of
gains and  losses.  Such  transactions  may  increase  the amount of  short-term
capital  gain  realized  by the Fund,  which is taxed as  ordinary  income  when
distributed to shareholders.

The Fund may be subject to foreign  withholding  taxes,  which would  reduce the
yield on its investments.  It is generally  expected that Fund  shareholders who
are subject to U.S.  federal  income tax will not be entitled to claim a federal
income tax credit or deduction for foreign income taxes paid by the Fund.

The Fund will also be  subject  to a 4%  non-deductible  excise  tax on  certain
amounts not distributed or treated as having been  distributed on a timely basis
each calendar year. The Fund intends to distribute to shareholders  each year an
amount adequate to avoid the imposition of such excise tax.

Dividends paid by the Fund will qualify for the dividends-received deduction for
corporations  to the extent they are  derived  from  dividends  paid by domestic
corporations. Corporate shareholders must have held their shares in the Fund for
more than 45 days to qualify for the deduction for dividends paid by the Fund.

Gain and loss realized by the Fund on certain  transactions,  including sales of
foreign debt securities and certain  transactions  involving  foreign  currency,
will be treated as ordinary  income or loss for federal  income tax  purposes to
the  extent,  if any,  that  such gain or loss is  attributable  to  changes  in
exchange rates for foreign  currencies.  Accordingly,



                                       19
<PAGE>


distributions taxable as ordinary income will include the net amount, if any, of
such  foreign  exchange  gain and will be reduced by the net amount,  if any, of
such foreign exchange loss.

If the Fund  purchases  shares in certain  foreign  investment  entities  called
"passive foreign investment  companies," the Fund may be subject to U.S. federal
income  tax  on a  portion  of  any  "excess  distribution"  or  gain  from  the
disposition  of such  shares,  even if such income is  distributed  as a taxable
dividend by the Fund to its  shareholders.  Additional  charges in the nature of
interest  may be imposed on the Fund in respect of deferred  taxes  arising from
such  distributions  or gains.  If the Fund were to make a  "qualified  electing
fund"  election with respect to its investment in a passive  foreign  investment
company,  in lieu of the foregoing  requirements,  the Fund might be required to
include in income each year a portion of the  ordinary  earnings and net capital
gains of the passive foreign  investment  company,  even if such amount were not
distributed   to  the  Fund.   Alternatively,   if  the  Fund  were  to  make  a
"mark-to-market"  election  with respect to the  investment  would be considered
realized at the end of each taxable year of the Fund even if the Fund  continued
to hold the  investment,  and would be treated as ordinary income or loss to the
Fund.

The  foregoing  discussion  relates  solely to U.S.  federal  income  tax law as
applicable  to U.S.  persons  (U.S.  citizens  or  residents  and United  States
domestic corporations,  partnerships,  trusts and estates). Each shareholder who
is not a U.S.  person  should  consult his tax adviser  regarding  the U.S.  and
foreign tax  consequences of the ownership of shares of the Fund,  including the
applicable  rate of U.S.  withholding  tax on  dividends  representing  ordinary
income and net short-term  capital gains, and the applicability of U.S. gift and
estate taxes




                                       8.
                           Information About the Fund


Lord Abbett Bond-Debenture Fund, Inc. was organized in 1970 and was incorporated
under  Maryland law on January 23, 1976.  The Fund has  1,000,000,000  shares of
authorized capital stock consisting of five classes of shares. This statement of
additional  information offers four of those classes (A, B, C and P), $0.001 par
value. The Board of Directors will allocate these  authorized  shares of capital
stock among the classes from time to time.  All shares have equal  noncumulative
voting  rights  and  equal  rights  with  respect  to   dividends,   assets  and
liquidation, except for certain class-specific expenses. They are fully paid and
nonassessable when issued and have no preemptive or conversion rights.  Although
no present plans exist to do so, further series may be added in the future.  The
Act ,  requires  that where more than one series  exists,  each  series  must be
preferred over all other series in respect of assets  specifically  allocated to
such series.

Rule 18f-2 under the Act provides that any matter  required to be submitted,  by
the provisions of the Act or applicable  state law or otherwise,  to the holders
of the outstanding  voting securities of an investment  company such as the Fund
shall not be deemed to have been  effectively  acted upon unless approved by the
holders of a majority of the  outstanding  shares of each class affected by such
matter.  Rule 18f-2 further provides that a class shall be deemed to be affected
by a matter unless the  interests of each class in the matter are  substantially
identical or the matter does not affect any interest of such class. However, the
Rule exempts the selection of independent public accountants,  the approval of a
contract  with a principal  underwriter  and the election of directors  from its
separate voting requirements.

The Fund's By-Laws provide that the Fund shall not hold an annual meeting of its
stockholders  in any year unless one or more matters are required to be acted on
by  stockholders  under the Act, or unless  called by a majority of the Board of
Directors  or by  stockholders  holding at least one quarter of the stock of the
Fund  outstanding  and  entitled  to vote at the  meeting.  When any such annual
meeting is held, the stockholders  will elect directors and vote on the approval
of the independent auditors of the Fund.



                                       20
<PAGE>

The  directors,  trustees and officers of Lord  Abbett-sponsored  mutual  funds,
together  with the partners  and  employees  of Lord  Abbett,  are  permitted to
purchase and sell securities for their personal investment accounts. In engaging
in  personal  securities  transactions,  however,  such  persons  are subject to
requirements  and  restrictions  contained  in the Fund's  Code of Ethics  which
complies,  in  substance,  with each of the  recommendations  of the  Investment
Company Institute's  Advisory Group on Personal  Investing.  Among other things,
the Code  requires  that Lord  Abbett  partners  and  employees  obtain  advance
approval before buying or selling securities, submit confirmations and quarterly
transaction  reports,  and obtain  approval  before  becoming a director  of any
company;  and it  prohibits  such  persons  from  investing in a security 7 days
before or after any Lord  Abbett-sponsored  fund or Lord Abbett-managed  account
considers a trade or trades in such  security,  from  profiting on trades of the
same  security  within  60 days and from  trading  on  material  and  non-public
information.  The Code imposes certain similar  requirements and restrictions on
the independent directors and trustees of each Lord Abbett-sponsored mutual fund
to the extent contemplated by the recommendations of the Advisory Group.



                                       9.
                              Financial Statements


The  financial  statements  for the fiscal year ended  December 31, 1999 and the
report  of  Deloitte  & Touche  LLP,  independent  auditors,  on such  financial
statements  contained in the 1999 Annual Report to  Shareholders  of Lord Abbett
Bond-Debenture Fund, Inc. are incorporated herein by reference to such financial
statements  and report,  in reliance upon the authority of Deloitte & Touche LLP
as experts in auditing and accounting.




                                       10.
                                    Appendix

                             Corporate Bond Ratings

Moody's Investors Service, Inc.'s Corporate Bond Ratings

Aaa - Bonds  which are rated Aaa are judged to be of the best  quality and carry
the smallest  degree of investment  risk.  Interest  payments are protected by a
large or by an exceptionally  stable margin, and principal is secure.  While the
various  protective  elements  are  likely to  change,  such  changes  as can be
visualized are most unlikely to impair the fundamentally strong position of such
issues.

Aa - Bonds which are rated Aa are judged to be of high-quality by all standards.
Together  with  the Aaa  group,  they  comprise  what  are  generally  known  as
high-grade  bonds.  They are rated lower than the best bonds because  margins of
protection may not be as large as in Aaa  securities,  fluctuation of protective
elements  may be of greater  amplitude  or there may be other  elements  present
which make the long-term risks appear somewhat larger than in Aaa securities.

A - Bonds which are rated A possess many favorable investment attributes and are
to be considered as upper medium-grade  obligations.  Factors giving security to
principal and interest are considered adequate but elements may be present which
suggest a susceptibility to impairment sometime in the future.

Baa - Bonds  which are rated Baa are  considered  as  medium-grade  obligations,
i.e., they are neither highly  protected nor poorly secured.  Interest  payments
and principal  security appear  adequate for the present but certain  protective
elements may be lacking or may be  characteristically  unreliable over any great
length of time. Such bonds lack outstanding  investment  characteristics and, in
fact, have speculative characteristics as well.

Ba - Bonds  which are rated Ba are judged to have  speculative  elements;  their
future cannot be considered  as well assured.  Often the  protection of interest
and  principal  payments may be very  moderate and thereby not well  safeguarded
during  both  good  and bad  times  over the  future.  Uncertainty  of  position
characterizes bonds in this class.


                                       21
<PAGE>

B - Bonds  which are  rated B  generally  lack  characteristics  of a  desirable
investment.  Assurance of interest and principal  payments or of maintenance and
other terms of the contract over any long period of time may be small.

Caa - Bonds  that are  rated Caa are of poor  standing.  Such  issues  may be in
default or there may be present  elements of danger with respect to principal or
interest.

Ca - Bonds that are rated Ca represent  obligations  which are  speculative in a
high degree. Such issues are often in default or have other marked shortcomings.

C - Bonds  that are rated C are the  lowest-rated  class of bonds and  issues so
rated can be regarded as having  extremely  poor prospects of ever attaining any
real investment standing.


Standard & Poor's Corporation's Corporate Bond Ratings

AAA - This is the  highest  rating  assigned  by  Standard  &  Poor's  to a debt
obligation  and  indicates an extremely  strong  capacity to pay  principal  and
interest.

AA - Bonds rated AA also qualify as high-quality debt  obligations.  Capacity to
pay principal and interest is very strong and in the majority of instances  they
differ from AAA issues only in small degree.

A - Bonds rated A have a strong capacity to pay principal and interest, although
they are  somewhat  more  susceptible  to the  adverse  effects  of  changes  in
circumstances and economic conditions.

BBB - Bonds  rated  BBB are  regarded  as  having an  adequate  capacity  to pay
principal  and  interest.  Whereas they  normally  exhibit  adequate  protection
parameters,  adverse  economic  conditions  or changing  circumstances  are more
likely to lead to a weakened capacity to pay principal and interest for bonds in
this category than for bonds in the A category.

BB-B-CCC-CC-C  -  Debt  rated  BB,  B,  CCC,  CC  and C is  regarded  as  having
predominately  speculative  characteristics  with  respect  to  capacity  to pay
interest and repay principal. 'BB' indicates the least degree of speculation and
'CCC' the highest.  While such debt will likely have some quality and protective
characteristics,  these are  outweighed  by large  uncertainties  or major  risk
exposures to adverse conditions.

D - Debt rated 'D' is in payment  default.  The 'D' rating category is used when
interest payments or principal payments are not made on the date due even if the
applicable grace period has not expired,  unless S&P believes such payments will
be made  during  such grace  period.  The 'D' rating  also will be used upon the
filing of a bankruptcy petition if debt service payments are jeopardized.

                                       22

<PAGE>

<PAGE>

Lord Abbett Bond-Debenture Fund
Lord Abbett Developing Growth Fund
Lord Abbett Mid-Cap Value Fund

                                                                  Class Y Shares
                                                                      Prospectus
                                                                     May 1, 2000

[logo]

As with all  mutual  funds,  the  Securities  and  Exchange  Commission  has not
approved or  disapproved  these  securities  or passed upon the adequacy of this
prospectus. Any representation to the contrary is a criminal offense.

Only  Class Y shares of certain  funds are  offered  to the  general  public and
available in all states. Please call 800-821-5129 for further information.

<PAGE>

                               Table of Contents

                              The Funds

Information about goal, principal              Bond-Debenture Fund            2
strategy, main risks, performance and          Developing Growth Fund         5
fees and expenses                              Mid-Cap Value Fund


                              Your Investment

Information for managing                       Purchases                      11
your fund account                              Redemptions                    12
                                               Distributions and Taxes        12
                                               Services For Fund Investors    13
                                               Management                     13


                              For More Information

How to learn more                              Other Investment Techniques    15
about the Funds                                Glossary of Shaded Terms       16
                                               Recent Performance             16



                              Financial Information

Financial highlights and                       Bond-Debenture Fund            19
line graph comparison                          Developing Growth Fund         21
of each Fund                                   Mid-Cap Value Fund             23


How to learn more about the                    Back Cover
Funds and other Lord Abbett Funds


<PAGE>

                                                             Bond-Debenture Fund

GOAL

     The Fund's  investment  objective  is to seek high  current  income and the
     opportunity for capital appreciation to produce a high total return.


PRINCIPAL STRATEGY

     To pursue its goal, the Fund normally  invests in high yield and investment
     grade  debt  securities,  securities  convertible  into  common  stock  and
     preferred stocks. Under normal circumstances, the Fund invests at least 65%
     of its total assets in fixed income  securities of various types.  At least
     20% of the Fund's assets must be invested in any  combination of investment
     debt securities, U.S. Government securities and cash equivalents.


     We  believe  that  a  high  total  return   (current   income  and  capital
     appreciation)  may  be  derived  from  an  actively  managed,   diversified
     portfolio  of  investments.  Through  port-folio  diversification,   credit
     analysis and attention to current developments and trends in interest rates
     and economic  conditions,  we attempt to reduce the risks.  We seek unusual
     values,  using  fundamental,  bottom-up  research to  identify  undervalued
     securities.  In recent  years,  the Fund has found good value in high yield
     securities,  sometimes called  "lower-rated bonds" or "junk bonds," and has
     invested  more than half its assets in those  securities.  Higher  yield on
     debt  securities can occur during periods of high inflation when the demand
     for borrowed money is high. Also, buying  lower-rated bonds when we believe
     the credit risk is likely to decrease, may generate higher returns.


     While typically fully invested,  at times we may take a temporary defensive
     position by investing some of the Fund's assets in cash and short-term debt
     securities.  This could  reduce the benefit  from any upswing in the market
     and prevent the Fund from achieving its investment objective.


MAIN RISKS

     The Fund is subject to the general risks and considerations associated with
     investing in debt  securities.  The value of an investment in the Fund will
     change as interest rates  fluctuate in response to market  movements.  When
     interest rates rise,  the prices of debt  securities are likely to decline,
     and when interest rates fall, the prices of debt  securities  tend to rise.
     Longer-term  debt  securities  are usually more  sensitive to interest rate
     changes.  Put another  way,  the longer the  maturity  of a  security,  the
     greater  the  effect a change  in  interest  rates is likely to have on its
     price.


     There is also the risk that an issuer of a debt  security will fail to make
     timely  payments  of  principal  or  interest  to the Fund,  a risk that is
     greater with junk bonds.  Some  issuers,  particularly  of junk bonds,  may
     default as to principal  and/or interest  payments after the Fund purchases
     their securities.  This may result in losses to the Fund. In addition,  the
     market for high yield  securities  generally is less liquid than the market
     for higher-rated securities.


     An  investment  in the Fund is not a bank  deposit  and is not  insured  or
     guaranteed  by the  Federal  Deposit  Insurance  Corporation  or any  other
     government  agency.  The Fund is not a complete  investment program and may
     not be appropriate for all investors.  You could lose money by investing in
     the Fund.


We or the Fund refers to Lord Abbett Bond-Debenture Fund, Inc.

About The Fund. The Fund is a professionally managed portfolio primarily holding
securities purchased with the pooled money of investors. It strives to reach its
stated goal, although as with all funds, it cannot guarantee results.


You should read this entire prospectus, including "Other Investment Techniques,"
which concisely  describes the other investment  strategies used by the Fund and
their risks.


2 The Funds


<PAGE>

                                                             Bond-Debenture Fund

PERFORMANCE

     The bar chart and  table  below  provide  some  indication  of the risks of
     investing  in the  Fund  by  illustrating  the  variability  of the  Fund's
     returns.  Each assumes  reinvestment  of dividends and  distributions.  The
     Fund's past  performance  is not  necessarily an indication of how the Fund
     will perform in the future.


     The bar chart shows changes in the performance of the Fund's Class Y shares
     from calendar year to calendar year.

- --------------------------------------------------------------------------------
Bar Chart (per calendar year) - Class Y Shares
- --------------------------------------------------------------------------------
1999 - 4.3%
[GRAPHIC OMITTED]
Worst Quarter   3rd Q `98  -4.9%
Best Quarter   4th Q `98    4.9%

- --------------------------------------------------------------------------------
     The table below shows how the average  annual  total  returns of the Fund's
     Class Y shares compared to those of a broad-based  securities  market index
     and three more narrowly based indices.  Although the Fund's portfolio blend
     has changed through the years,  historically  it was composed  primarily of
     three  categories of securities:  (1) high-yield  corporate debt (including
     straight  preferred  stocks);  (2)  equity-related   securities;   and  (3)
     high-grade  debt.  Because no single  index  existed  that  combined  these
     categories  in a  manner  similar  to the  Fund,  we  compared  the  Fund's
     performance  to  that of  three  indices  which  included  elements  of the
     categories:  First Boston High Yield Index ("High Yield Index"); Value Line
     Convertible  Index  ("Value  Line  Index");   and  Salomon  Brothers  Broad
     Investment  Bond Index ("Salomon  Index").  The Fund now intends to replace
     the Value Line Index and the Salomon Index with the Lehman  Aggregate  Bond
     Index.  The  Lehman  Aggregate  Bond  Index  is not  only a  broader  based
     securities  market index but is also more commonly used in fund performance
     comparisons and more accessible to shareholders.


- --------------------------------------------------------------------------------
Average Annual Total Returns Through December 31, 1999
- --------------------------------------------------------------------------------
Share Class                                     1 Year        Since Inception(1)

Class Y shares                                   4.27%                  2.72%
- --------------------------------------------------------------------------------
Lehman Aggregate Bond Index(2)                   -.82%                  3.47%(3)
- --------------------------------------------------------------------------------
Salomon Index(2)                                 -.84%                  3.46%(3)
- --------------------------------------------------------------------------------
High Yield Index(2)                              3.28%                   .48%(3)
- --------------------------------------------------------------------------------
Value Line Index(2)                             19.50%                  4.31%(3)
- --------------------------------------------------------------------------------

(1)  The date of inception for Class Y shares is 3/27/98.

(2)  Performance  for  the  unmanaged  indices  does  not  reflect  any  fees or
     expenses. The performance of the indices is not necessarily  representative
     of the Fund's performance.

(3)  This  represents  total  return  for the  period  3/31/98  -  12/31/99,  to
     correspond with Class Y inception date.


                                                                     The Funds 3



<PAGE>

                                                             Bond-Debenture Fund

FEES AND EXPENSES

     This table  describes the fees and expenses that you may pay if you buy and
     hold shares of the Fund.

- --------------------------------------------------------------------------------
Fee Table
- --------------------------------------------------------------------------------
                                                                  Class Y
Shareholder Fees (Fees paid directly from your investment)
- --------------------------------------------------------------------------------
Maximum Sales Charge on Purchases
- --------------------------------------------------------------------------------
(as a % of offering price)                                         none
- --------------------------------------------------------------------------------
Maximum Deferred Sales Charge                                      none
- --------------------------------------------------------------------------------
Annual Fund Operating  Expenses  (Expenses deducted from Fund assets) (as a % of
average net assets) Management Fees (See "Management") 0.46%

- --------------------------------------------------------------------------------
Other Expenses                                                    0.14%
- --------------------------------------------------------------------------------
Total Operating Expenses                                          0.60%

- --------------------------------------------------------------------------------
Example
- --------------------------------------------------------------------------------

This  example is intended to help you compare the cost of  investing in the Fund
with the cost of investing in other mutual  funds.  This  example,  like that in
other funds'  prospectuses,  assumes that you invest $10,000 in the Fund for the
time  periods  indicated  and then redeem all of your shares at the end of those
periods. The example also assumes that your investment has a 5% return each year
and that the Fund's  operating  expenses  remain the same.  Although your actual
costs may be higher or lower, based on these assumptions your costs would be:

Share Class                1 Year       3 Years         5 Years         10 Years

Class Y shares               $61         $192            $336              $750
- --------------------------------------------------------------------------------

Management fees are payable to Lord, Abbett & Co. ("Lord Abbett") for the Fund's
investment management.

Other  expenses  include fees paid for  miscellaneous  items such as shareholder
service fees and professional fees.


4 The Funds


<PAGE>

                                                          Developing Growth Fund

GOAL

     The Fund's  investment  objective is long-term growth and capital through a
     diversified and actively managed portfolio  consisting of developing growth
     companies, many of which are traded over the counter.

PRINCIPAL STRATEGY

     To pursue its goal,  the Fund  primarily  invests  in the common  stocks of
     companies with  above-average,  long-term  growth  potential,  particularly
     smaller companies considered to be in the developing growth phase. The Fund
     uses a bottom-up  stock selection  process,  which means that it focuses on
     the  investment  fundamentals  of companies,  rather than reacting to stock
     market events.  The Fund is broadly  diversified  over many  industries and
     economic  sectors.  Normally,  the Fund  invests  at least 65% of its total
     assets in securities of small companies.


     The  Fund  tries  to  identify  companies  that it  believes  are  strongly
     positioned in the developing  growth phase. This we define as the period of
     swift development after a company's  start-up phase when growth occurs at a
     rate rarely  equaled by  established  companies in their mature  years.  Of
     course,  because the actual growth of a company cannot be foreseen,  we may
     not always be correct in our judgment.


     While typically fully invested,  we may take a temporary defensive position
     by  investing  some of the  Fund's  assets  in  cash  and  short-term  debt
     securities.  This could  reduce the benefit  from any upswing in the market
     and prevent the Fund from achieving its investment objective.


MAIN RISKS

     The Fund is subject to the general risks and considerations associated with
     equity  investing.  The value of your investment will fluctuate in response
     to movements in the stock market in general,  and to the changing prospects
     of individual companies in which the Fund invests.


     The Fund has particular  risks  associated  with growth  stocks.  Different
     types of stocks shift in and out of favor  depending on market and economic
     conditions. Although growth companies may grow faster than other companies,
     they may have greater volatility in their stock prices. In addition, if the
     Fund's assessment  of a company's  potential  for growth or market
     conditions  is wrong, it could suffer losses or produce poor performance
     relative to other funds, even in a rising market.


     Investing  in  small  companies   generally  involves  greater  risks  than
     investing in the stocks of large  companies.  Small companies may have less
     experienced management and unproven track records. They may rely on limited
     product lines and have limited financial resources.  These factors may make
     them more susceptible to setbacks or economic downturns. In addition, small
     company  stocks  tend to have  fewer  shares  outstanding  and  trade  less
     frequently than the stocks of larger companies.  As a result,  there may be
     less liquidity in the prices of small company  stocks,  subjecting  them to
     greater price fluctuations than larger company stocks.


     An  investment  in the Fund is not a bank  deposit  and is not  insured  or
     guaranteed  by the  Federal  Deposit  Insurance  Corporation  or any  other
     government  agency.  The Fund is not a complete  investment program and may
     not be appropriate for all investors. You could lose money by investing in
     the Fund.

We or the Fund refers to Lord Abbett Developing Growth Fund, Inc.

About the Fund. The Fund is a professionally managed portfolio primarily holding
securities purchased with the pooled money of investors. It strives to reach its
stated goal, although as with all mutual funds, it cannot guarantee results.

You should read this entire prospectus, including "Other Investment Techniques,"
which concisely  describes the other  investment  strategies used bythe Fund and
their risks.


                                                                     The Funds 5


<PAGE>

                                                          Developing Growth Fund

PERFORMANCE

     The bar chart and  table  below  provide  some  indication  of the risks of
     investing  in the  Fund  by  illustrating  the  variability  of the  Fund's
     returns.  Each assumes  reinvestment  of dividends and  distributions.  The
     Fund's past  performance  is not  necessarily an indication of how the Fund
     will perform in the future.


     The bar chart shows changes in the performance of the Fund's Class Y shares
     from calendar year to calendar year.

- --------------------------------------------------------------------------------
Bar Chart (per calendar year) - Class Y Shares
- --------------------------------------------------------------------------------

1998 - 8.6%
1999 - 38.9%

[GRAPHIC OMITTED]
Best Quarter   1st Q `98  28.4%               Worst Quarter   3rd Q `98   -22.0%

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

     The table below shows how the average  annual  total  returns of the Fund's
     Class Y shares compare to those of a broad-based securities market index.

- --------------------------------------------------------------------------------
Average Annual Total Returns Through December 31, 1999
- --------------------------------------------------------------------------------
Share Class                                    1 Year         Since Inception(1)
- --------------------------------------------------------------------------------
Class Y shares                                 38.85%              23.78%
- --------------------------------------------------------------------------------
Russell 2000 Index(2)                          21.26%               8.70%

(1)  The date of inception for Class Y shares is 12/30/97.

(2)  Performance for the unmanaged index does not any reflect fees or expenses.
     The performance of the index is not  necessarily  representative  of the
     Fund's performance.


6 The Funds


<PAGE>

                                                          Developing Growth Fund

FEES AND EXPENSES

     This table  describes the fees and expenses that you may pay if you buy and
     hold shares of the Fund.

- --------------------------------------------------------------------------------
FEE TABLE
- --------------------------------------------------------------------------------
                                                                  Class Y
Shareholder Fees (Fees paid directly from your investment)
- --------------------------------------------------------------------------------
Maximum Sales Charge on Purchases
- --------------------------------------------------------------------------------
(as a % of offering price)                                         none
- --------------------------------------------------------------------------------
Maximum Deferred Sales Charge                                      none
- --------------------------------------------------------------------------------
Annual Fund Operating  Expenses  (Expenses deducted from Fund assets) (as a % of
average net assets)
- --------------------------------------------------------------------------------
Management Fees (See "Management")                                0.53%
- --------------------------------------------------------------------------------
Other Expenses                                                    0.26%
- --------------------------------------------------------------------------------
Total Operating Expenses                                          0.79%
- --------------------------------------------------------------------------------


- --------------------------------------------------------------------------------
Example
- --------------------------------------------------------------------------------

This  example is intended to help you compare the cost of  investing in the Fund
with the cost of investing in other mutual  funds.  This  example,  like that in
other funds'  prospectuses,  assumes that you invest $10,000 in the Fund for the
time  periods  indicated  and then redeem all of your shares at the end of those
periods. The example also assumes that your investment has a 5% return each year
and that the Fund's  operating  expenses  remain the same.  Although your actual
costs may be higher or lower, based on these assumptions your costs would be:

Share Class                1 Year         3 Years        5 Years        10 Years
Class Y shares               $81           $252           $439            $978
- --------------------------------------------------------------------------------

Management fees are payable to Lord Abbett for the Fund's investment management.

Other  expenses  include fees paid for  miscellaneous  items such as shareholder
service fees and professional fees.


The Funds 7


<PAGE>

                                                              Mid-Cap Value Fund

GOAL

     The Fund seeks  capital  appreciation  through  investments,  primarily  in
     equity securities, which are believed to be undervalued in the marketplace.

PRINCIPAL STRATEGY

     Normally,  at  least  65%  of the  Fund's  total  assets  will  consist  of
     investments in mid-sized companies,  with market capitalizations of roughly
     $500 million to $10 billion.  Generally,  the Fund, using a value approach,
     tries  to  identify  stocks  of  companies  that  have  the  potential  for
     significant market appreciation,  due to growing recognition of improvement
     in their financial results, or increasing anticipation of such improvement.
     In trying to identify those companies, we look for such factors as:


     o    changes in economic and financial environment

     o    new or improved products or services

     o    new or rapidly expanding markets

     o    changes in management or structure of the company

     o    price increases for the company's products or services

     o    improved  efficiencies  resulting from new  technologies or changes in
          distribution

     o    changes in government  regulations,  political  climate or competitive
          conditions


     While typically fully invested,  we may take a temporary defensive position
     in cash and short-term debt securities.  This could reduce the benefit from
     any  upswing  in the  market  and  prevent  the  Fund  from  realizing  its
     investment objective.

MAIN RISKS

     The Fund is subject to the general risks and considerations associated with
     equity  investing,  as well as the particular  risks  associated with value
     stocks.  The  value  of your  investment  will  fluctuate  in  response  to
     movements in the stock  market in general and to the changing  prospects of
     individual  companies in which the Fund invests.  Our portfolio may perform
     differently  than the market as a whole and other types of stocks,  such as
     growth stocks.  This is because  different types of stocks tend to shift in
     and out of favor  depending on market and economic  conditions.  The market
     may fail to recognize the intrinsic  value of particular  stocks for a long
     time.  In  addition,  if the  Fund's  assessment  of a  company's  value or
     prospects  for  exceeding  earnings  expectations  or market  conditions is
     wrong, the Fund could suffer losses or produce poor performance relative to
     other funds, even in a rising market.


     An  investment  in the Fund is not a bank  deposit  and is not  insured  or
     guaranteed  by the  Federal  Deposit  Insurance  Corporation  or any  other
     government  agency.  The Fund is not a complete  investment program and may
     not be appropriate for all investors.  You could lose money by investing in
     the Fund.

We or the Fund refers to Lord Abbett Mid-Cap Value Fund, Inc.

About the Fund. The Fund is a professionally managed portfolio primarily holding
securities purchased with the pooled money of investors. It strives to reach its
stated goal, although as with all mutual funds, it cannot guarantee results.

Value stocks are stocks of  com-panies  which we believe the market  undervalues
according to certain financial measurements of their intrinsic worth or business
prospects.

Growth stocks exhibit  faster-than-average gains in earnings and are expected to
continue  profit growth at a high level,  but also tend to be more volatile than
value stocks.

You should read this entire prospectus, including "Other Investment Techniques,"
which concisely  describes the other investment  strategies used by the Fund and
their risks.


8 The Funds


<PAGE>

                                                              Mid-Cap Value Fund

PERFORMANCE

     The bar chart and  table  below  provide  some  indication  of the risks of
     investing  in the  Fund  by  illustrating  the  variability  of the  Fund's
     returns.  Each assumes  reinvestment  of dividends and  distributions.  The
     Fund's past  performance  is not  necessarily an indication of how the Fund
     will perform in the future.


     The bar chart shows changes in the performance of the Fund's Class A shares
     from calendar year to calendar year.

- --------------------------------------------------------------------------------
Bar Chart (per calendar year) - Class A Shares
- --------------------------------------------------------------------------------
1989 - 20.1%
1990 - -4.6%
1991 - 27.4%
1992 - 13.5%
1993 - 14.0%
1994 - -3.3%
1995 - 26.1%
1996 - 21.2%
1997 - 31.5%
1998 - -0.5%
1999 -  4.2%
[GRAPHIC OMITTED]
Best Quarter   2nd Q `99  17.6%               Worst Quarter   3rd Q `98   -17.3%

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

     The table below shows how the average  annual  total  returns of the Fund's
     Class A shares compared to those of two broad-based securities market
     indices.

<TABLE>
<CAPTION>

- ------------------------------------------------------------------------------------------
Average Annual Total Returns Through December 31, 1999
- ------------------------------------------------------------------------------------------
Share Class                               1 Year    5 Years  10 Years   Since Inception(1)

<S>                                       <C>       <C>       <C>             <C>
Class A shares                           -1.70%     14.48%    11.56%           -
- ------------------------------------------------------------------------------------------
Russell Mid-Cap Index ("RMC Index")(2)   18.23%     21.86%    15.92%(3)        -
S&P Mid-Cap Barra Value Index(2)          2.32%     18.16%     -(4)            -
- ------------------------------------------------------------------------------------------

</TABLE>

(1)  Because  Class Y shares are new,  the bar chart and table show  returns for
     Class A shares.  Returns for Class Y shares will be somewhat higher because
     Class Y shares  have  lower  expenses.  The date of  inception  for Class Y
     shares is 5/3/99.


(2)  Performance  for  the  unmanaged  indices  does  not  reflect  any  fees or
     expenses.  The performance of indices is not necessarily  representative of
     the Fund's performance.


(3)  This  represents  total  return for the  period  12/31/89  -  12/31/99,  to
     correspond with Class A inception date.


(4)  Performance  for the S&P Mid-Cap Barra Value Index for the ten-year  period
     is not available.


The Funds 9


<PAGE>

                                                              Mid-Cap Value Fund

FEES AND EXPENSES

     This table  describes the fees and expenses that you may pay if you buy and
     hold shares of the Fund.

- --------------------------------------------------------------------------------
Fee Table
- --------------------------------------------------------------------------------
                                                                  Class Y

Shareholder Fees (Fees paid directly from your investment)
- --------------------------------------------------------------------------------
Maximum Sales Charge on Purchases
- --------------------------------------------------------------------------------
(as a % of offering price)                                         none
- --------------------------------------------------------------------------------
Maximum Deferred Sales Charge                                      none
- --------------------------------------------------------------------------------
Annual Fund Operating  Expenses  (Expenses deducted from Fund assets) (as a % of
average net assets)
- --------------------------------------------------------------------------------
Management Fees (See "Management") 0.70%
- --------------------------------------------------------------------------------

Other Expenses                                                    0.32%
- --------------------------------------------------------------------------------
Total Operating Expenses                                          1.02%
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
Example
- --------------------------------------------------------------------------------
This  example is intended to help you compare the cost of  investing in the Fund
with the cost of investing in other mutual  funds.  This  example,  like that in
other funds'  prospectuses,  assumes that you invest $10,000 in the Fund for the
time  periods  indicated  and then redeem all of your shares at the end of those
periods. The example also assumes that your investment has a 5% return each year
and that the Fund's  operating  expenses  remain the same.  Although your actual
costs may be higher or lower, based on these assumptions your costs would be:

Share Class                 1 Year         3 Years          5 Years     10 Years

Class Y shares                $104          $325             $563        $1,248
- --------------------------------------------------------------------------------

Management fees are payable to Lord Abbett for the Fund's investment management.

Other  expenses  include fees paid for  miscellaneous  items such as shareholder
service fees and professional fees.


                                                              Your Investment 11


<PAGE>

Your Investment

PURCHASES

     Class Y shares.  You may  purchase  Class Y shares  at the net asset  value
     ("NAV") per share next determined after we receive and accept your purchase
     order submitted in a proper form. No sales charges apply.


     We reserve the right to withdraw all or part of the  offering  made by this
     prospectus  or to reject any purchase  order.  We also reserve the right to
     waive or change minimum  investment  requirements.  All purchase orders are
     subject to our acceptance  and are not binding until  confirmed or accepted
     in writing.

     Who May Invest?  Eligible purchasers of Class Y shares include: (1) certain
     authorized  brokers,  dealers,  registered  investment  advisers  or  other
     financial institutions ("entities") who either (a) have an arrangement with
     Lord Abbett  Distributor in accordance with certain  standards  approved by
     Lord Abbett Distributor,  providing specifically for the use of our Class Y
     shares  in  particular  investment  products  made  available  for a fee to
     clients of such entities or (b) charge an advisory, consulting or other fee
     for their services and buy shares for their own accounts or the accounts of
     their  clients  ("Mutual  Fund Fee Based  Programs");  (2) the  trustee  or
     custodian under any deferred compensation or pension or profit-sharing plan
     or payroll  deduction IRA  established  for the benefit of the employees of
     any company  with an  account(s)  in excess of $10 million  managed by Lord
     Abbett  or  its  sub-advisers  on  a  private-advisory-account  basis;  (3)
     institutional investors, such as retirement plans, companies,  foundations,
     trusts,  endowments  and other entities where the total amount of potential
     investable  assets  exceeds $50 million  that were not  introduced  to Lord
     Abbett by persons  associated with a broker or dealer primarily involved in
     the retail  securities  business.  Additional  payments may be made by Lord
     Abbett out of its own resources with respect to certain of these sales.

     How Much Must You Invest?  You may buy our shares  through any  independent
     securities  dealer having a sales  agreement with Lord Abbett  Distributor,
     our exclusive  selling agent.  Place your order with your investment dealer
     or send the money to the Fund you selected (P.O.  Box 219100,  Kansas City,
     Missouri  64121).  The minimum initial  investment is $1 million except for
     Mutual Fund Fee Based Program,  which has no minimum.  This offering may be
     suspended,  changed or withdrawn by Lord Abbett  Distributor which reserves
     the right to reject any order.

     Buying  Shares  Through Your Dealer.  Orders for shares  received by a Fund
     prior to the close of the NYSE,  or received by dealers prior to such close
     and received by Lord Abbett  Distributor prior to the close of its business
     day, will be confirmed at NAV effective at such NYSE close. Orders received
     by dealers after the NYSE closes and received by Lord Abbett Distributor in
     proper form prior to the close of its next business day are executed at the
     NAV  effective as of the close of the NYSE on that next  business  day. The
     dealer is responsible for the timely  transmission of orders to Lord Abbett
     Distributor. A business day is a day on which the NYSE is open for trading.

     Buying Shares By Wire. To open an account,  call  800-821-5129  Ext. 34028,
     Institutional  Trade  Dept.,  to set up your  account and to arrange a wire
     transaction.  Wire to: United Missouri Bank of Kansas City,  N.A.,  Routing
     number - 101000695,  bank account number:  9878002611,  FBO: (account name)
     and (your Lord Abbett  account  number).  Specify the complete  name of the
     Fund, note Class Y shares and include your new account number

NAV per share  for each Fund is  calculated  each  business  day at the close of
regular  trading on the New York Stock  Exchange  ("NYSE"),  normally  4:00 p.m.
Eastern  Time.  Purchases  and sales of Fund shares are executed at the NAV next
determined  after the Fund receives  your order in proper form.  In  calculating
NAV,  securities  for which market  quotations are available are valued at those
quotations. Securities for which such quotations are not available are valued at
fair value under procedures approved by the Board.

Lord Abbett  Distributor LLC ("Lord Abbett  Distributor")  acts as agent for the
Funds to work with investment  professionals  that buy and/or sell shares of the
Funds on behalf of their clients.  Generally,  Lord Abbett  Distributor does not
sell Fund shares directly to investors.

Exchange  Limitations.  Exchanges should not be used to try to take advantage of
short-term swings in the market.  Frequent  exchanges create higher expenses for
the Funds. Accordingly,  each Fund reserves the right to limit or terminate this
privilege  for  any  shareholder   making  frequent  exchanges  or  abusing  the
privilege.  The Funds also may revoke the privilege for all shareholders upon 60
days' written notice.


                                                              Your Investment 11


<PAGE>

     and your name. To add to an existing account, wire to: United Missouri Bank
     of Kansas City,  N.A.,  routing  number - 101000695,  bank account  number:
     9878002611,  FBO:  (account  name) and (your Lord Abbett  account  number).
     Specify the complete name of the Fund, note Class Y shares and include your
     account number and your name.



REDEMPTIONS

     By Broker.  Call your  investment  professional  for  directions  on how to
     redeem your shares.

     By  Telephone.  To obtain the proceeds of a  redemption  of $50,000 or less
     from  your  account,  you or your  representative  can  call  the  Funds at
     800-821-5129.

     By Mail. Submit a written  redemption  request  indicating,  the name(s) in
     which the account is registered, the Fund's name, the class of shares, your
     account number, and the dollar value or number of shares you wish to sell.

     Include all necessary signatures. If the signer has any Legal Capacity, the
     signature and capacity must be guaranteed by an Eligible Guarantor. Certain
     other legal documentation may be required.  For more information  regarding
     proper documentation call 800-821-5129.

     Normally  a check  will be  mailed  to the name and  address  in which  the
     account is registered (or otherwise  according to your instruction)  within
     three business days after receipt of your redemption request.  Your account
     balance  must be  sufficient  to cover the amount  being  redeemed  or your
     redemption order will not be processed.  Under unusual circumstances,  each
     Fund may suspend redemptions, or postpone payment for more than seven days,
     as permitted by federal securities laws.

     By Wire. In order to receive funds by wire,  our servicing  agent must have
     the wiring  instructions  on file. To verify that this feature is in place,
     call 800-821-5129 Ext. 34028,  Institutional  Trading Dept.  (minimum wire:
     $1,000).  Your wire redemption  request must be received by the Fund before
     the close of the NYSE for money to be wired on the next business day.

DISTRIBUTIONS AND TAXES

     The Funds  normally  pay  dividends  from  their net  investment  income as
     follows:  monthly,  for Bond-Debenture  Fund; and annually,  for Developing
     Growth Fund,  and Mid-Cap  Value Fund.  Each Fund  distributes  net capital
     gains (if any) as "capital gains  distributions" at least annually.  Your
     distributions  will be reinvested in your Fund unless you instruct the Fund
     to pay them to you in cash. The tax status of distributions is the same for
     all  shareholders  regardless  of how long they have owned  Fund  shares or
     whether distributions are reinvested or paid in cash.


     Except in tax-advantaged accounts, any sale, redemption or exchange of Fund
     shares may be taxable to the shareholder.


     Information on the tax treatment of distributions,  including the source of
     dividends and  distributions of capital gains by the Funds,  will be mailed
     to shareholders each year.  Because everyone's tax situation is unique, you
     should  consult your tax adviser  regarding the treatment of  distributions
     under the federal, state and local tax rules that apply to you.

Eligible Guarantor is any broker or bank that is a member of the medallion stamp
program.  Most major securities  firms and banks are members of this program.  A
notary public is not an Eligible Guarantor.


12 Your Investment


<PAGE>

SERVICES FOR FUND INVESTORS

AUTOMATIC SERVICES

     We offer the following shareholder services:

     Telephone  Exchange  Privilege.  Class Y shares may be exchanged  without a
     service  charge  for Class Y shares  of any  Eligible  Fund  among the Lord
     Abbett-sponsored funds.

     Account  Statements.  Every Lord  Abbett  investor  automatically  receives
     quarterly account statements.

     Householding. Shareholders with the same last name and address will receive
     a single copy of a prospectus and an annual or semi-annual  report,  unless
     additional reports are specifically requested in writing to the Funds.

     Account Changes. For any changes you need to make to your account,  consult
     your investment professional or call the Funds at 800-821-5129.

     Systematic  Exchange.  You or your investment  professional can establish a
     schedule of exchanges between the same classes of any Eligible Fund.

MANAGEMENT

     The Funds'  investment  adviser is Lord, Abbett & Co., located at 90 Hudson
     St.,  Jersey City, NJ 07302-3973.  Founded in 1929, Lord Abbett manages one
     of the  nation's  oldest  mutual fund  complexes,  with  approximately  $35
     billion in more than 40 mutual fund portfolios and other advisory accounts.
     For more information  about the services Lord Abbett provides to the Funds,
     see the Statement of Additional Information.


     Lord Abbett is entitled to a management fee at the annual rate of each
     Fund's average daily net assets shown below. The fees are calculated and
     payable monthly.


     Bond-Debenture Fund

          .50 of 1% on the first $500  million of average  daily net  assets,
          .45  of 1%  on  assets  over  $500  million.


     Based on this  calculation,  the management fee paid to Lord Abbett for the
     fiscal year ended  December 31, 1999, was at an annual rate of .46 of 1% of
     the Fund's average daily net assets.


     Developing Growth Fund

          .75 of 1% on the first $100 million of average daily net  assets,
          .50  of 1%  on  assets  over  $100  million.


     Based on this  calculation,  the management fee paid to Lord Abbett for the
     fiscal year ended  January 31, 2000,  was at an annual rate of .53 of 1% of
     the Fund's average daily net assets.


     Mid-Cap Value Fund

          .75 of 1% on the first $200 million of average daily net assets,
          .65 of 1% on the next $300 million,
          .50 of 1% on assets over $500 million.


     Based on this  calculation,  the management fee paid to Lord Abbett for the
     fiscal year ended  December 31, 1999, was at an annual rate of .70 of 1% of
     the Fund's average daily net assets.

     Each Fund pays all expenses not expressly assumed by Lord Abbett.

Telephone Transactions. You have this privilege unless you refuse it in writing.
For your security,  telephone  transaction  requests are recorded.  We will take
measures to verify the  identity  of the  caller,  such as asking for your name,
account  number,  social  security or taxpayer  identification  number and other
relevant  information.  Each Fund will not be liable for following  instructions
communicated by telephone that it reasonably believes to be genuine.

Transactions  by  telephone  may be  difficult  to implement in times of drastic
economic or market change.


                                                              Your Investment 13


<PAGE>

     Investment  Managers.  Lord Abbett uses a team of  investment  managers and
     analysts acting together to manage each Fund's investments.

     Bond-Debenture  Fund.  Christopher J. Towle,  Partner of Lord Abbett, heads
     the team, the other senior members of which include Richard Szaro,  Michael
     Goldstein  and Thomas  Baade.  Messrs.  Towle and Szaro have been with Lord
     Abbett since 1988 and 1983, respectively.  Mr. Goldstein has been with Lord
     Abbett since 1997.  Before  joining Lord Abbett,  Mr.  Goldstein was a bond
     trader for Credit  Suisse BEA  Associates  from August 1992  through  April
     1997.  Mr. Baade joined Lord Abbett in 1998;  prior to that he was a credit
     analyst with Greenwich Street Advisors.

     Developing Growth Fund. Stephen J. McGruder,  Partner of Lord Abbett, heads
     the team, the other senior members of which include  Lesley-Jane  Dixon and
     Rayna Lesser.  Mr.  McGruder and Ms. Dixon have been with Lord Abbett since
     1995,  Ms. Lesser has been with Lord Abbett since 1996 and Ms. Hughes since
     1998.  Prior to joining Lord Abbett,  Mr. McGruder was a portfolio  manager
     with Wafra Investment  Advisory Group. Ms. Dixon was an equity analyst with
     Wafra  Investment  Advisory  Group before  joining Lord Abbett.  Ms. Lesser
     joined  Lord  Abbett  directly  from  Barnard  College.

     Mid-Cap Value Fund. Edward K. von der Linde,  Investment Manager, heads the
     team, the other senior members are Eileen Banko,  Howard Hansen,  and David
     Builder.  Both Mr. von der Linde and Ms.  Banko have been with Lord  Abbett
     for more than five years.  Mr. Hansen joined Lord Abbett in 1995;  prior to
     that he was an analyst at Alfred Berg Inc.  from 1990 - 1995.  Mr.  Builder
     joined Lord Abbett in 1998; prior to that he was an analyst at Bear Stearns
     from 1996 - 1998 and at Weiss, Peck & Greer from 1994 - 1995.


14 Your Investment


<PAGE>

                                                            For More Information

OTHER INVESTMENT TECHNIQUES

     This section describes some of the investment techniques that might be used
     by the Funds, and their risks.

     Adjusting Investment  Exposure.  Each Fund may, but is not required to, use
     various strategies to change its investment  exposure to adjust to changing
     security prices,  interest rates, currency exchange rates, commodity prices
     and other factors.  Each fund may use these transactions to change the risk
     and return characteristics of its portfolio.  If we judge market conditions
     incorrectly  or use a strategy that does not correlate well with the Fund's
     investments,  it could result in a loss, even if we intended to lessen risk
     or enhance  returns.  These  transactions may involve a small investment of
     cash  compared  to the  magnitude  of the risk  assumed  and could  produce
     disproportionate  gains or losses.  Also,  these strategies could result in
     losses if the counterparty to a transaction does not perform as promised.

     Convertible  Securities.  The Bond-Debenture Fund may invest in convertible
     bonds and convertible  stocks.  These  investments tend to be more volatile
     than debt  securities  but tend to be less volatile and produce more income
     than their underlying common stocks.


     Foreign Securities. The Bond-Debenture Fund may invest up to 20% of its net
     assets in foreign securities. Developing Growth Fund and Mid-Cap Value Fund
     may each invest up to 10% of their  assets in foreign  securities.  Foreign
     securities are securities  primarily traded in countries outside the United
     States.  Foreign markets and the securities  traded in them are not subject
     to the same degree of regulation as U.S. markets.  Securities clearance and
     settlement  procedures may be different in foreign countries.  There may be
     less trading volume in foreign markets, subjecting the securities traded in
     them to  higher  price  fluctuations.  Transaction  costs  may be higher in
     foreign  markets.  A Fund may hold foreign  securities  which trade on days
     when the Fund  does not sell  shares.  As a  result,  the value of a Fund's
     portfolio  securities  may change on days an investor  may not  purchase or
     sell Fund shares.


     Foreign issuers are generally not subject to similar,  uniform  accounting,
     auditing and financial  reporting  requirements  as U.S.  issuers.  Foreign
     investments  may be  affected  by changes  in  currency  rates or  currency
     controls.  Certain  foreign  countries may limit a Fund's ability to remove
     its assets from the  country.  With respect to certain  foreign  countries,
     there is a possibility of  nationalization,  expropriation  or confiscatory
     taxation, imposition of withholding or other taxes, and political or social
     instability which could affect investments in those countries.


     Short-Term   Fixed-Income   Securities.   Each  is   authorized  to  invest
     temporarily in certain short-term fixed income securities.  Such securities
     may be used to invest  uncommitted cash balances,  to maintain liquidity to
     meet shareholder  redemptions,  or to take a temporary  defensive  position
     against market declines. These securities include: oblig-ations of the U.S.
     Government and its agencies and  instrumentalities;  commercial paper, bank
     certificates  of  deposit,   and  bankers'   acceptances;   and  repurchase
     agreements collateralized by these securities.


                                                         For More Information 15


<PAGE>

GLOSSARY OF SHADED TERMS

     Eligible Fund. An Eligible Fund is any Lord  Abbett-sponsored fund offering
     Class Y shares.

     Eurodollar.  Eurodollars are U.S. currency held in banks outside the United
     States,  mainly in Europe,  and commonly  used for  settling  international
     transactions.  Some securities are issued in  Eurodollars--that  is, with a
     promise to pay interest in dollars deposited in foreign bank accounts.

     Legal  Capacity.  This term refers to the authority of an individual to act
     on behalf of an entity or other  person(s).  For  example,  if a redemption
     request were to be made on behalf of the estate of a deceased  shareholder,
     John W. Doe, by a person  (Robert A. Doe) who has the legal capacity to act
     for the estate of the  deceased  shareholder  because he is the executor of
     the estate,  then the request  must be executed as follows:  Robert A. Doe,
     Executor of the Estate of John W. Doe. That  signature  using that capacity
     must be guaranteed by an Eligible Guarantor.

     To give another example,  if a redemption request were to be made on behalf
     of the ABC Corporation by a person (Mary B. Doe) who has the legal capacity
     to act on behalf of the  Corporation,  because she is the  president of the
     corporation,  the request must be executed as follows:  ABC  Corporation by
     Mary  B.  Doe,  President.  That  signature  using  that  capacity  must be
     guaranteed by an Eligible Guarantor (see example in right column).

     Mutual Fund Fee Based Program.  Certain  unaffiliated  authorized  brokers,
     dealers,  registered  investment  advisers or other financial  institutions
     ("entities")   who  either  (1)  have  an  arrangement   with  Lord  Abbett
     Distributor in accordance  with certain  standards  approved by Lord Abbett
     Distributor,  providing  specifically  for  the  use  of  our  shares  (and
     sometimes providing for acceptance of orders for such shares on our behalf)
     in particular  investment  products made  available for a fee to clients of
     such entities, or (2) charge an advisory, consulting or other fee for their
     services  and buy shares for their own  accounts  or the  accounts of their
     clients.

RECENT PERFORMANCE

     The following is a discussion of recent  performance  for the  twelve-month
     period ending December 31, 1999.


     Bond-Debenture  Fund.  The fourth  quarter of 1999 was  difficult  for bond
     investors.  The U.S.  Federal  Reserve Board (the "Fed") raised  short-term
     interest  rates for the third  consecutive  time,  reversing the three rate
     reductions that occurred in 1998. As the economy continued to exhibit signs
     of strong  growth  and  record  levels of  employment,  investors  remained
     fearful  that  inflationary  pressures  could  develop  as a result  of the
     continued  expansion  of the U.S.  economy.  While  credit  spreads  -- the
     difference  in  yield  between  bonds of the same  maturity  but  different
     quality -- did tighten  some  (contracted),  they  continued to remain wide
     during the quarter.


     We spent the  fourth  quarter  trying to avoid the risk of rising  interest
     rates by keeping  our  exposure  to  Treasurys  to a minimum  and  slightly
     increasing our allocation to  convertible  bonds -- securities  that can be
     exchanged for stock of the issuing  corporation at specified prices.  Since
     we anticipate  that the recovery in the global  economy will  continue,  we
     invested in some multinational  technology  manufacturing and semiconductor
     companies that we believe offered of good value.


     Despite  challenging  market  conditions and a significant rise in interest
     rates  during  the past 15  months,  high-yield  bonds  were among the best
     performers in the U.S. bond market. We maintained an allocation of over 63%
     of the Fund to high-yield bonds as


GUARANTEED SIGNATURE. An acceptable form of guarantee would be as follows:

  In the case of the estate --

    Robert A. Doe
    Executor of the Estate of
    John W. Doe

    [Date]

             SIGNATURE GUARANTEED
             MEDALLION GUARANTEED
              NAME OF GUARANTOR

            [SIGNATURE ILLEGIBLE]
- --------------------------------------------------
                            AUTHORIZED SIGNATURE
(960)                            X 9 6 0 3 4 7 0
SECURITIES TRANSFER AGENTS MEDALLION PROGRAM'sm'
                                              SR

  In the case of the corporation --
  ABC Corporation

    Mary B. Doe

    By Mary B. Doe, President

    [Date]

             SIGNATURE GUARANTEED
             MEDALLION GUARANTEED
              NAME OF GUARANTOR

            [SIGNATURE ILLEGIBLE]
- --------------------------------------------------
                            AUTHORIZED SIGNATURE
(960)                            X 9 6 0 3 4 7 0
SECURITIES TRANSFER AGENTS MEDALLION PROGRAM'sm'
                                              SR


16 For More Information


<PAGE>

     they continued to offer a tremendous  yield  advantage over  Treasurys.  We
     also  found  good  value in the  bonds of  technology,  telecommunications,
     media, and cable companies.  Conversely,  we were disappointed by the bonds
     of small  companies,  which  struggled  with  less  access to  capital  and
     increasing default rates.  Investors seemed to prefer the more liquid bonds
     of larger companies.


     Our  holdings  in  convertible   securities  also  helped  the  portfolio's
     performance.  On the heels of strong  corporate  earnings,  persistent U.S.
     economic growth and recent stock market  advances,  we took profits on some
     of the portfolio's  convertible securities that had increased significantly
     in price. We maintained  moderate exposure to  mortgage-backed  securities,
     investing mainly in new,  higher-coupon FNMA bonds that were acquired below
     par (face value).


     We will continue to closely monitor the Fed for further rate increases.  We
     feel  that  bonds  represent  an  excellent  value  give  today's  level of
     inflation, and should continue to be attractive if inflation remains in the
     area of 2% to 3%.  While  we do not  anticipate  a  meaningful  decline  in
     interest  rates  in the  short  term,  we  remain  encouraged  by  economic
     indicators such as low inflation and the U.S. Government budget surplus.


     The following is a discussion of recent  performance  for the  twelve-month
     period ending January 31, 2000.


     Developing  Growth  Fund.  The  Fund  ended  its  fiscal  year  with  solid
     performance,  as the stocks of small  growth-oriented  companies  rebounded
     from their  difficulties in the early part of 1999.  Throughout the period,
     our investment team remained true to its investment  strategy,  focusing on
     acquiring  the stocks of  well-run  small  companies  with  strong  current
     earnings and future earnings growth potential. Due to capacity constraints,
     and in order to maintain the integrity of our  investment  philosophy,  the
     Developing  Growth Fund closed its doors to all new investors at the end of
     business on January 31,  2000.  Current  investors  may  continue to add to
     existing accounts.


     Our investments in technology-related  companies significantly  contributed
     to the Fund's strong performance  during the year. In particular,  the Fund
     was helped by our holdings in technology outsourcing companies - those that
     help  corporate  America  implement  and operate  Internet  businesses  and
     wireless communication companies.


     Conversely,  stocks of  companies  in the Fund whose  earnings did not meet
     Wall Street expectations did not perform well. Many of these companies were
     impacted by business  slowdowns  as they were forced to focus on  potential
     Y2K  problems.  Investors  reacted in the extreme to any company  that fell
     short of earnings expectations, causing its stock price to fall sharply.


     The strong  performance  of the  stocks of small  technology  companies  in
     recent months  increased our  technology  weighting.  While  valuations for
     technology  stocks have  reached  high levels in some cases,  our  research
     suggests  that the  demand  for  technology  goods  and  services  warrants
     continued exposure to the stocks of some new companies.


     We  believe  we are  entering  a  favorable  environment  for small  growth
     companies,  as the economy  continues to exhibit signs of steady growth and
     low inflation. Our research indicates that substantial value exists in many
     of  these  smaller  companies,  as  they  currently  offer  greater  growth
     potential and better value than the average large company growth stock.


                                                         For More Information 17


<PAGE>

     The following is a discussion of recent  performance  for the  twelve-month
     period ending December 31, 1999.


     Mid-Cap Value Fund.  The 1999 year started with several  months of volatile
     stock market performance, which was most likely caused by the after-effects
     of 1998's  collapse of the Long Term Capital hedge fund and South  American
     financial panics. The stocks of technology and telecommunications companies
     dominated the indicies  during the first quarter of 1999. A shift  occurred
     in the second  quarter  when,  in what we see as a  harbinger  of things to
     come, value stocks  outperformed  growth stocks.  The third quarter of 1999
     was fairly  uneventful  until near its end, when the stocks of  technology,
     telecommunications  and  biotech  companies  began a new run that  extended
     through the end of the year.  During the fourth  quarter of 1999, the gains
     made through value  investing  faded as momentum  investing once again took
     hold.


     Despite the success of momentum investing, we stayed with out discipline of
     investing in seasoned,  mid-sized U.S. and multinational companies in sound
     financial  condition.  The Fund's  performance was driven  primarily by our
     investments  in the  stocks  of  energy  companies  and  select  technology
     companies. At the end of 1998 and the beginning of 1999, the stocks of many
     energy  companies  (oil and  gas,  refining)  were  selling  at  attractive
     discounts.  We  took  advantage  of the  "fire  sale"  prices  and  built a
     substantial  position in the energy sector.  These investments saw sizeable
     returns as oil prices rose from around $10 a barrel at the beginning of the
     year up to the $20 a  barrel  range as 1999  ended.  We also  continued  to
     reduce our exposure to the stocks of financial  companies  during the first
     half of 1999, largely avoiding the weak performance of this group caused by
     rising interest rates in the second half of the year.


<PAGE>

                                                             Bond-Debenture Fund

Financial Information

FINANCIAL HIGHLIGHTS

     This  table  describes  the  Fund's  performance  for  the  fiscal  periods
     indicated.  "Total return" shows how much your investment in the Fund would
     have  increased  (or  decreased)  during  each  period,  assuming  you  had
     reinvested all dividends and distributions. These Financial Highlights have
     been audited by Deloitte & Touche LLP, the Fund's independent  auditors, in
     conjunction  with their  annual audit of the Fund's  financial  statements.
     Financial  statements  for the fiscal year ended  December 31, 1999 and the
     Independent  Auditors'  Report  thereon  appear  in the  Annual  Report  to
     Shareholders  for  the  fiscal  year  ended  December  31,  1999,  and  are
     incorporated  by reference  into the Statement of  Additional  Information,
     which is available upon request.  Certain  information  reflects  financial
     results for a single Fund share.

<TABLE>
<CAPTION>

- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                    Class Y Shares
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                Year Ended
December 31,
Per Share Operating Performance:
1999                     1998(a)

<S>
<C>                      <C>
Net asset value, beginning of year
$9.44                    $9.98
- ------------------------------------------------------------------------------------------------------------------------------------
Income from investment operations
- ------------------------------------------------------------------------------------------------------------------------------------
 Net investment income(c)
 .78                      .59
- ------------------------------------------------------------------------------------------------------------------------------------
 Net realized and unrealized loss on investments
- ------------------------------------------------------------------------------------------------------------------------------------
   and foreign currency transactions
(.40)                    (.54)
- ------------------------------------------------------------------------------------------------------------------------------------
Total from investment operations
 .38                      .05
- ------------------------------------------------------------------------------------------------------------------------------------
Dividends and Distributions
- ------------------------------------------------------------------------------------------------------------------------------------
 Dividends from net investment income
(.78)                    (.59)
- ------------------------------------------------------------------------------------------------------------------------------------
Net asset value, end of year
$9.04                    $9.44
- ------------------------------------------------------------------------------------------------------------------------------------
Total Return(b)
4.27%                    0.55%(d)
- ------------------------------------------------------------------------------------------------------------------------------------
Ratios to Average Net Assets:
- ------------------------------------------------------------------------------------------------------------------------------------
 Expenses(e)
 .60%                     .46%(d)
- ------------------------------------------------------------------------------------------------------------------------------------
 Net investment income
8.52%                    6.24%(d)
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                Year Ended
December 31,
- ------------------------------------------------------------------------------------------------------------------------------------
Supplemental Data For All Classes:
1999                     1998
Net Assets, end of year (000)
$3,777,623               $3,540,124
- ------------------------------------------------------------------------------------------------------------------------------------
Portfolio turnover rate
67.93%                   86.48%
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>


(a)  Commencement of offering Class Y shares - 3/27/98.
(b)  Total return assumes the reinvestment of all distributions.
(c)  Calculated using average shares outstanding during the period.
(d)  Not annualized.
(e)  The  ratios  for 1998 and 1999  include  expenses  paid  through an expense
     offset arrangement.


                                                        Financial Information 19


<PAGE>

                                                             Bond-Debenture Fund

LINE GRAPH COMPARISON

     Immediately below is a comparison of a $10,000 investment in Class A shares
     to the same investment in the Lehman  Aggregate Bond Index,  Salomon Index,
     High-Yield  Index,  and Value  Line  Index,  assuming  reinvestment  of all
     dividends  and  distributions.  Although  the  Fund's  portfolio  blend has
     changed through the years,  historically it was composed primarily of three
     categories of securities: (1) high-yield corporate debt (including straight
     preferred stocks); (2) equity-related  securities; and (3) high-grade debt.
     Because no single index existed that combined these  categories in a manner
     similar to the Fund,  we compared the Fund's  performance  to that of three
     indices which included elements of the categories:  High Yield Index; Value
     Line Index;  and Salomon  Index.  The Fund now intends to replace the Value
     Line Index and the Salomon Index with the Lehman  Aggregate Bond Index. The
     Lehman Aggregate Bond Index is not only a broader based  securities  market
     index but is also more commonly used in fund  performance  comparisons  and
     more accessible to shareholders.

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

[GRAPHIC OMITTED]

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

                Average Annual Total Return At Maximum Applicable
              Sales Charge For The Periods Ending December 31, 1999

                      1 Year            5 Years         10 Years (or Life)
- --------------------------------------------------------------------------------
Class A(2)            -1.00%             8.83%               9.70%
- --------------------------------------------------------------------------------
Class Y(3)             4.27%               -                 2.72%
- --------------------------------------------------------------------------------

(1)  Performance for the unmanaged Lehman Aggregate Bond Index (source:  Lipper,
     Inc.), Salomon Index (source: Chase Global Data Service),  High-Yield Index
     (source: Callan Associates),  and Value Line Index (source: Morgan Stanley)
     does not reflect any fees or  expenses.  Performance  of the indices is not
     necessarily representative of the Fund's performance.

(2)  This  shows  total  return  which is the  percent  change in  value,  after
     deduction of the maximum initial sales charge of 4.75%  applicable to Class
     A shares,  with all dividends and distributions  reinvested for the periods
     shown ending  December 31, 1999 using the  SEC-required  uniform  method to
     compute such return.

(3)  The Class Y shares  were first  offered on 3/27/98.  Performance  is at net
     asset value.


20 Financial Information


<PAGE>

                                                          Developing Growth Fund

FINANCIAL HIGHLIGHTS

     This  table  describes  the  Fund's  performance  for  the  fiscal  periods
     indicated.  "Total return" shows how much your investment in the Fund would
     have  increased  (or  decreased)  during  each  period,  assuming  you  had
     reinvested all dividends and distributions. These Financial Highlights have
     been audited by Deloitte & Touche LLP, the Fund's independent  auditors, in
     conjunction  with their  annual audit of the Fund's  financial  statements.
     Financial  statements  for the fiscal  year ended  January 31, 2000 and the
     Independent  Auditors'  Report  thereon  appear  in the  Annual  Report  to
     Shareholders   for  the  fiscal  year  ended  January  31,  2000,  and  are
     incorporated  by reference  into the Statement of  Additional  Information,
     which is available upon request.  Certain  information  reflects  financial
     results for a single Fund share.


<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                             Class Y Shares

- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                         Year Ended January 31,
Per Share Operating Performance:                                             2000
1999               1998(d)

<S>                                                                         <C>
<C>                 <C>
Net asset value, beginning of year                                          $16.30
$14.27              $14.12
- ------------------------------------------------------------------------------------------------------------------------------------
Income (loss) from investment operations
- ------------------------------------------------------------------------------------------------------------------------------------
 Net investment loss(a)                                                       (.05)
(.03)             --(e)
- ------------------------------------------------------------------------------------------------------------------------------------
 Net realized and unrealized
- ------------------------------------------------------------------------------------------------------------------------------------
  gain on investments                                                         4.14
2.11                 .15
- ------------------------------------------------------------------------------------------------------------------------------------
Total from investment operations                                              4.09
2.08                 .15
- ------------------------------------------------------------------------------------------------------------------------------------
Distributions from net realized gain                                          (.69)
(.05)                --
- ------------------------------------------------------------------------------------------------------------------------------------
Net asset value, end of year                                                $19.70
$16.30              $14.27
- ------------------------------------------------------------------------------------------------------------------------------------
Total Return(b)                                                              25.88%
14.59%               1.06%(c)
- ------------------------------------------------------------------------------------------------------------------------------------
Ratios to Average Net Assets:
- ------------------------------------------------------------------------------------------------------------------------------------
 Expenses                                                                      .81%(f)
 .72%(f)             .06%(c)
- ------------------------------------------------------------------------------------------------------------------------------------
 Net investment loss                                                          (.26)%
(.22)%              (.02)%(c)
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                      Year Ended January 31,
- ------------------------------------------------------------------------------------------------------------------------------------
Supplemental Data For All Classes:                                           2000
1999                1998
Net Assets, end of year (000)                                             $2,912,681
$1,344,203           $553,086
- ------------------------------------------------------------------------------------------------------------------------------------
Portfolio turnover rate                                                     50.13%
30.89%              33.60%
</TABLE>


(a)  Calculated using average shares outstanding during the period.
(b)  Total return assumes the reinvestment of all distributions.
(c)  Not annualized.
(d)  Commencement of offering Class Y shares - 12/30/97.
(e)  Amount less than $.01.
(f)  The  ratios  for 1999 and 2000  include  expenses  paid  through an expense
     offset arrangement.


                                                        Financial Information 21


<PAGE>

                                                          Developing Growth Fund

LINE GRAPH COMPARISON

     Immediately below is a comparison of a $10,000 investment in Class A shares
     to the same investment in the Russell 2000 Index,  assuming reinvestment of
     all dividends and distributions.

- --------------------------------------------------------------------------------
                    NAV            Russell 2000

1-31-91             11,466         9,621
1-31-92             16,226         13,929
1-31-93             15,852         15,774
1-31-94             18,454         18,706
1-31-95             17,947         17,582
1-31-96             26,961         22,847
1-31-97             34,603         27,177
1-31-98             43,043         32,088
1-31-99             49,170         32,194
1-31-00             61,623         37,905
[GRAPHIC OMITTED]

- --------------------------------------------------------------------------------
                Average Annual Total Return At Maximum Applicable
              Sales Charge For The Periods Ending January 31, 2000
                       1 Year           5 Years        10 Years (or Life)
- --------------------------------------------------------------------------------
Class A(2)            18.10%            26.48%              19.24%
- --------------------------------------------------------------------------------
Class Y(3)            25.88%               -                19.77%
- --------------------------------------------------------------------------------

(1)  Performance  for the unmanaged index does not reflect any fees or expenses.
     The  performance  of the  index is not  necessarily  representative  of the
     Fund's performance.

(2)  This shows total  return  which is the percent  change in net asset  value,
     with all dividends and distributions reinvested for the period shown ending
     January 31, 2000 using the  SEC-required  uniform  method to compute  total
     return. The Class A share inception date is 10/10/73.

(3)  The Class Y shares were first  offered on 12/30/97.  Performance  is at net
     asset value.


22 Financial Information


<PAGE>

                                                              Mid-Cap Value Fund

FINANCIAL HIGHLIGHTS

     This  table  describes  the  Fund's  performance  for  the  fiscal  periods
     indicated.  "Total return" shows how much your investment in the Fund would
     have  increased  (or  decreased)  during  each  period,  assuming  you  had
     reinvested all dividends and distributions. These Financial Highlights have
     been audited by Deloitte & Touche LLP, the Fund's independent  auditors, in
     conjunction  with their  annual audit of the Fund's  financial  statements.
     Financial  statements  for the fiscal year ended  December 31, 1999 and the
     Independent  Auditors'  Report  thereon  appear  in the  Annual  Report  to
     Shareholders   for  the  fiscal  year  ended  December  31,  1999  and  are
     incorporated  by reference  into the Statement of  Additional  Information,
     which is available upon request.  Certain  information  reflects  financial
     results for a single Fund share.

- --------------------------------------------------------------------------------
                                                             Class Y Shares

- --------------------------------------------------------------------------------
                                                         Year Ended December 31,
Per Share Operating Performance:                                 1999(b)
Net asset value, beginning of year                               $13.06
- --------------------------------------------------------------------------------
Income from investment operations
- --------------------------------------------------------------------------------
 Net investment income(c)                                           .05
- --------------------------------------------------------------------------------
 Net realized and unrealized gain on investments                    .14
- --------------------------------------------------------------------------------
Total from investment operations                                    .19
- --------------------------------------------------------------------------------
Dividends and Distributions
- --------------------------------------------------------------------------------
 Dividends from net investment income                               --
- --------------------------------------------------------------------------------
Net asset value, end of period                                   $13.25
- --------------------------------------------------------------------------------
Total Return(a)(d)                                                 1.45%(c)
- --------------------------------------------------------------------------------
Ratios to Average Net Assets:(d)
- --------------------------------------------------------------------------------
 Expenses                                                           .69%(c)
- --------------------------------------------------------------------------------
 Net investment income                                              .41%(c)
- --------------------------------------------------------------------------------
                                                         Year Ended December 31,
- --------------------------------------------------------------------------------
Supplemental Data For All Classes:                                1999

Net Assets, end of year (000)                                   $394,106
- --------------------------------------------------------------------------------
Portfolio turnover rate                                           64.76%
- --------------------------------------------------------------------------------

(a)  Total return assumes the reinvestment of all distributions.
(b)  Commencement of offering Class Y shares - 5/3/99.
(c)  Calculated using average shares outstanding during the year.
(d)  Not annualized.
(e)  The  ratios 1999  include  expenses  paid  through an expense
     offset arrangement.


                                                        Financial Information 23


<PAGE>

                                                              Mid-Cap Value Fund

LINE GRAPH COMPARISON

     Immediately below is a comparison of a $10,000 investment in Class A shares
     to the  same  investment  in the RMC  Index  assuming  reinvestment  of all
     dividends and distributions.

- --------------------------------------------------------------------------------
12/31/89  10,000    9,422     10,000
12/31/90  9,536     8,985     8,850
12/31/91  12,145    11,443    12,524
12/31/92  13,780    12,983    14,570
12/31/93  15,702    14,794    16,654
12/31/94  15,191    14,312    16,305
12/31/95  19,152    18,045    21,923
12/31/96  23,218    21,876    26,088
12/31/97  30,540    28,774    33,656
12/31/98  30,403    28,645    37,052
12/31/99  31,691    29,858    43,807
[GRAPHIC OMITTED]

- --------------------------------------------------------------------------------
                Average Annual Total Return At Maximum Applicable
              Sales Charge For The Periods Ending December 31, 1999

                  1 Year               5 Years                 10 Years
- --------------------------------------------------------------------------------
Class A(2)        -1.70%               14.48%                    11.56%
- --------------------------------------------------------------------------------

(1)  Performance  for the unmanaged index does not reflect any fees or expenses.
     The  performance  of the  index is not  necessarily  representative  of the
     Fund's performance.
(2)  This shows total return which is the percent change in value,  at net asset
     value,  with all dividends  and  distributions  reinvested  for the periods
     shown ending  December 31, 1999 using the  SEC-required  uniform  method to
     compute  total  return.  Because  Class Y shares  are new,  the line  graph
     comparison  and the total returns shown are for Class A shares at net asset
     value.  Returns for Class Y shares will be somewhat higher because Y shares
     have lower expenses. The Class A share inception date is 6/28/83.


24 Financial Information


<PAGE>


                       THIS PAGE INTENTIONALLY LEFT BLANK


<PAGE>

     More  information on these Funds is available free upon request,  including
     the following:

ANNUAL/SEMI-ANNUAL REPORT

     Describes each Fund,  lists  portfolio  holdings and contains a letter from
     each Fund's  manager  discussing  recent market  conditions and each Fund's
     investment strategies.

STATEMENT OF ADDITIONAL INFORMATION ("SAI")

     Provides more details about the Funds and their policies.  A current SAI is
     on  file  with  the  Securities  and  Exchange  Commission   ("SEC")and  is
     incorporated by reference (is legally considered part of this prospectus).

     Lord Abbett Bond-Debenture Fund, Inc.
     Lord Abbett Developing Growth Fund, Inc.
     Lord Abbett Mid-Cap Value Fund, Inc.

     90 Hudson Street
     Jersey City, NJ 07302-3973
     ---------------------------
     SEC file numbers: 811-2145, 811-2871, 811-3691


To obtain information:

By telephone.  Call the Funds at: 800-426-1130

By mail.  Write to the Funds at:
The Lord Abbett Family of Funds
90 Hudson Street
Jersey City, NJ 07302-3973

Via the Internet.
Lord, Abbett & Co.
www.lordabbett.com

Text only versions of Fund documents can be viewed online or downloaded from:
SEC
www.sec.gov

You can also  obtain  copies by  visiting  the SEC's  Public  Reference  Room in
Washington, DC (phone 202-942-8090) or by sending your request and a duplicating
fee to the SEC's Public  Reference  Section,  Washington,  DC  20549-6009  or by
sending your request electronically to [email protected].

LAPROSP-Y6-1-300

(3/00)


<PAGE>

- --------------------------------------------------------------------------------
LORD,  ABBETT & CO.
- --------------------------------------------------------------------------------

Statement of Additional Information                                  May 1, 2000

                      Lord Abbett Bond-Debenture Fund, Inc.
                    Lord Abbett Developing Growth Fund, Inc.
                      Lord Abbett Mid-Cap Value Fund, Inc.

- --------------------------------------------------------------------------------
This Statement of Additional  Information is not a Prospectus.  A Prospectus for
the Class Y shares of Lord Abbett  Bond-Debenture  Fund,  Inc.  ("Bond-Debenture
Fund"), Lord Abbett Developing Growth Fund, Inc. ("Developing Growth Fund"), and
Lord Abbett Mid-Cap Value Fund, Inc. ("Mid-Cap Value Fund"),  individually ("we"
or the "Fund"), collectively (the "Funds"), may be obtained from your securities
dealer or from Lord Abbett  Distributor  LLC ("Lord Abbett  Distributor")  at 90
Hudson Street, Jersey City, New Jersey,  07302-3973.  This Statement relates to,
and should be read in conjunction with, the Prospectus dated May 1, 2000.

Shareholder  inquiries  should  be made by  directly  contacting  the Fund or by
calling  800-821-5129.  Each Fund's Annual Report to  Shareholders is available,
without charge, upon requests by calling that number. In addition,  you can make
inquiries through your dealer.



                  TABLE OF CONTENTS                                   Page

         1.       Investment Objective and Policies                    2

         2.       Directors and Officers                               5
         3.       Investment Advisory and Other Services               10
         4.       Portfolio Transactions                               11
         5.       Purchases, Redemptions and Shareholder Services      12
         6.       Performance                                          13
         7.       Taxes                                                13
         8.       Information About the Funds                          14
         9.       Financial Statements                                 14

<PAGE>

                                       1.
                       Investment Objective and Policies

Fundamental  Investment  Restrictions.  Each Fund is  subject  to the  following
investment restrictions,  which cannot be changed without approval of a majority
of each Fund's outstanding shares.

Each Fund may not:

(1)  borrow  money,  except that (i) each Fund may borrow from banks (as defined
     in the Investment Company Act of 1940 ("the Act")) in amounts up to 33 1/3%
     of its total assets  (including  the amount  borrowed),  (ii) each Fund may
     borrow up to an additional  5% of its total assets for temporary  purposes,
     (iii) each Fund may obtain such  short-term  credit as may be necessary for
     the clearance of purchases and sales of portfolio  securities and (iv) each
     Fund  may  purchase  securities  on  margin  to  the  extent  permitted  by
     applicable law);

(2)  pledge its assets (other than to secure such  borrowings,  or to the extent
     permitted by the Fund's  investment  policies,  as permitted by  applicable
     law;

(3)  engage in the  underwriting  of securities,  except pursuant to a merger or
     acquisition  or to the extent that, in connection  with the  disposition of
     its  portfolio  securities,  it may be  deemed to be an  underwriter  under
     federal securities laws;

(4)  make  loans  to  other  persons,  except  that the  acquisition  of  bonds,
     debentures or other  corporate debt securities and investment in government
     obligations,  commercial paper, pass-through  instruments,  certificates of
     deposit,   bankers  acceptances,   repurchase  agreements  or  any  similar
     instruments  shall not be subject to this  limitation,  and except  further
     that each Fund may lend its portfolio securities, provided that the lending
     of portfolio securities may be made only in accordance with applicable law;

(5)  buy or sell real  estate  (except  that each Fund may invest in  securities
     directly  or  indirectly  secured by real  estate or  interests  therein or
     issued by  companies  which  invest in real  estate or  interests  therein)
     commodities or commodity  contracts  (except to the extent each 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);

(6)  with respect to 75% of the gross assets of each Fund, buy securities of one
     issuer  representing  more than (i) 5% of the Fund's gross  assets,  except
     securities  issued or  guaranteed by the U.S.  Government,  its agencies or
     instrumentalities or (ii) 10% of the voting securities of such issuer;

(7)  invest  more  than  25%  of its  assets,  taken  at  market  value,  in the
     securities of issuers in any particular industry  (excluding  securities of
     the U.S. Government, its agencies and instrumentalities); or

(8)  issue  senior   securities  to  the  extent  such  issuance  would  violate
     applicable law.

Compliance  with the investment  restrictions in this Section will be determined
at the time of purchase or sale of the portfolio investment.

Non-Fundamental  Investment  Restrictions.  In addition  to the  policies in the
Prospectus and the investment restrictions above which cannot be changed without
shareholder  approval,  each Fund is  subject to the  following  non-fundamental
investment  policies  which may be  changed  by the Board of  Directors  without
shareholder approval.

Each Fund may not:

(1)  borrow  in  excess of 33 1/3% of its total  assets  (including  the  amount
     borrowed),  and then  only as a  temporary  measure  for  extraordinary  or
     emergency purposes;


                                       2


<PAGE>

(2)  make short sales of securities or maintain a short  position  except to the
     extent permitted by applicable law;

(3)  invest  knowingly  more  than  15%  of its  net  assets  (at  the  time  of
     investment) in illiquid  securities,  except for securities  qualifying for
     resale under Rule 144A of the Securities  Act of 1933,  deemed to be liquid
     by the Board of Directors;

(4)  invest in securities of other  investment  companies as defined in the Act,
     except as permitted by applicable law;

(5)  invest in  securities of issuers  which,  with their  predecessors,  have a
     record of less than three years of continuous operation, if more than 5% of
     each  Fund's  total  assets  would be  invested  in such  securities  (this
     restriction shall not apply to  mortgaged-backed  securities,  asset-backed
     securities or obligations issued or guaranteed by the U. S. Government, its
     agencies or instrumentalities);

(6)  hold securities of any issuer when more than 1/2 of 1% of the securities of
     such issuer are owned  beneficially  by one or more of each Fund's officers
     or  directors  or by one  or  more  partners  or  members  of  each  Fund's
     underwriter  or  investment  adviser if these owners in the  aggregate  own
     beneficially more than 5% of such securities of such issuer;

(7)  invest  in  warrants  if, at the time of  acquisition,  its  investment  in
     warrants,  valued at the lower of cost or market,  would  exceed 5% of each
     Fund's total assets (included within such limitation,  but not to exceed 2%
     of the Funds total  assets,  are  warrants  which are not listed on the New
     York or American Stock Exchange or a major foreign exchange);

(8)  invest in real estate  limited  partnership  interests or interests in oil,
     gas or other mineral leases, or exploration or development programs, except
     that each Fund may invest in securities  issued by companies that engage in
     oil, gas or other mineral exploration or development activities;

(9)  write,  purchase or sell puts,  calls,  straddles,  spreads or combinations
     thereof,  except  to  the  extent  permitted  in a  Fund's  prospectus  and
     statement of additional  information,  as may be amended from time to time;
     or

(10) buy from or sell to any of a Fund's officers, directors,  employees, or its
     investment  adviser or any of a Fund's  officers,  directors,  partners  or
     employees, any securities other than shares of each Fund.

With  respect  to  Developing  Growth  Fund,  it did not  invest  in  repurchase
agreements or lend portfolio  securities  during the last fiscal year and has no
present intent to do so.

Although  they have no  current  intention  to do so,  the  Funds may  invest in
financial futures and options on financial futures.

For the fiscal year ended  January 31, 2000,  the  portfolio  turnover  rate for
Developing Growth Fund was 50.13%,  versus 30.89% for the prior fiscal year; for
the fiscal  year ended  December  31,  1999,  the  portfolio  turnover  rate for
Bond-Debenture  Fund was 67.93%,  versus 86.48% for the prior year;  and for the
fiscal year ended  December 31, 1999,  the  portfolio  turnover rate for Mid-Cap
Value Fund was 64.76%, versus 46.58% for the prior year.

INVESTMENT TECHNIQUES

Stock Index Futures Contracts (Developing Growth Fund). The Fund believes it can
reduce the volatility  inherent in its portfolio  through the use of stock index
futures  contracts.  (A stock index futures contract is an agreement pursuant to
which two  parties  agree,  one to receive  and the other to pay, on a specified
date an amount of cash equal to a specified  dollar amount --  established by an
exchange  or board of trade -- times  the  difference  between  the value of the
index at the  close of the last  trading  day of the  contract  and the price at
which the futures  contract is originally  written.  No consideration is paid or
received at the time the contract is entered  into,  only the good faith deposit
described  herein.)  When Lord Abbett,  our  investment  manager,  anticipates a
general  decline in the sector of the stock market which  includes our portfolio
assets,  we can reduce risk by hedging the effect of such decline on our ability
to sell assets at best price or otherwise  hedge a decision to delay the sale of
portfolio  securities.   Such  hedging  would  be  possible  if  there  were  an
established, regularly-quoted stock index for equities of the character in which
we invest and if an active public market were to develop on a stock  exchange or
board of trade in futures contracts based on such index.


                                       3


<PAGE>

The market  value of a futures  contract is based  primarily on the value of the
underlying  index.  Changes  in  the  value  of the  index  will  cause  roughly
corresponding  changes in the market  price of the futures  contract,  except as
otherwise  described below. If a stock index is established  which is made up of
securities   whose   market   characteristics   closely   parallel   the  market
characteristics  of the securities in our portfolio,  then the market value of a
futures contract on that index should fluctuate in a way closely  resembling the
market fluctuation of our portfolio.  Thus, if we should sell futures contracts,
a decline in the market value of the portfolio  will be offset by an increase in
the value of the short  futures  position to the extent of the hedge (i.e.,  the
percentage  of the  portfolio  value  represented  by the  value of the  futures
position).  Conversely,  when we are in a strong  cash  position  (for  example,
through  substantial  sales  of our  shares)  and  wish to  invest  the  cash in
anticipation  of a rising  market,  we could  rapidly hedge against the expected
market increase by buying futures contracts to offset the cash position and thus
cushion the adverse  effect of  attempting  to buy  individual  securities  in a
rising market.

The public  markets for existing  stock index futures  contracts,  such as those
using the  Standard  & Poor's  100 Index  and 500  Index  traded on the  Chicago
Mercantile  Exchange or those using the New York Stock Exchange  Composite Index
traded on the New York Stock  Exchange  ("NYSE"),  are active and have developed
substantial  liquidity and we expect a similar market to develop for stock index
futures on a representative  group of over-the-counter  stocks. The existence of
an active market would permit us to close out our position in futures  contracts
by purchasing an equal and opposite position in the public market. Under futures
contracts  currently in use, the  purchaser  would be required to segregate in a
separate account,  as a good faith deposit,  cash or Treasury bills in an amount
set by a board of trade or exchange (currently  approximately 5% of the contract
value).  Each day during the  contract  period we would either pay or receive an
amount of cash equal to the daily  change in the total  value of the  contracts.
The amount which we may segregate upon entering into a futures  contract may not
exceed, together with the amounts on deposit under all outstanding contracts, 5%
of the value of our  total  assets,  nor may we enter  into  additional  futures
contracts if, as a result,  the aggregate  amount  committed  under all our open
futures contracts would exceed more than one-third of the value of such assets.

There are several  risks in  connection  with the use of futures  contracts as a
hedging device. One risk is the imperfect correlation between the composition of
our portfolio  securities  and the applicable  stock index.  If the value of the
futures  contract moves more than the value of the stock being hedged,  we would
experience  either a loss or a gain on the futures  contract  which would not be
completely  offset by  movements  in the value of the  securities  which are the
subject of the hedge.  Another risk is that the value of futures  contracts  may
not correlate  perfectly  with movement in the stock index due to certain market
distortions. Although we will enter into futures contracts strictly to hedge our
portfolio or cash positions,  other investors use these investment  vehicles for
other, sometimes more speculative, purposes. At times, excess speculation in the
futures market can distort the normal market  relationship  between the price of
the futures  contract and the value of the index.  If we decide to enter into or
close out our futures position during a period of such excess  speculation,  the
hedging strategy will be more or less successful, depending on the direction and
amount  of  this  distortion,  than  otherwise  would  be the  case.  Due to the
possibility  of price  distortion  in the  futures  market  and  because  of the
imperfect  correlation between movements in the stock index and movements in the
price of stock index futures  contracts,  a correct  forecast of general  market
trends by Lord Abbett may still not result in a successful hedging transaction.

It is possible  that,  when we sell  futures  contracts  to hedge our  portfolio
against a decline in the market, the market, as measured by the stock index, may
advance while the value of securities held in our portfolio may decline. If this
occurs,  we will lose  money on the  futures  contracts  and also  experience  a
decline in value in our portfolio securities. However, Lord Abbett believes that
over time the  value of a  diversified  portfolio  will tend to move in the same
direction as the market index upon which the futures contracts are based.


                                       4


<PAGE>

Where futures  contracts  are purchased to hedge against a possible  increase in
the price of stock before we are able to invest our cash position in stock in an
orderly fashion, it is possible that the market may decline instead and we would
realize a loss; if we then decide not to invest in stock at that time because of
concern as to possible  further market  decline or for other  reasons,  we would
realize a loss on the futures  contract that would be offset,  to the extent the
cash position had not been invested in stocks being hedged.

Positions in futures contracts may be closed out only on an exchange or board of
trade which provides a market for such contracts. Although we intend to purchase
or sell  futures  contracts  only  if an  active  market  has  developed  and is
continuing,  there is no assurance  that a liquid market on an exchange or board
of trade will exist for any particular  contract or at any  particular  time. In
such event, it may not be possible to close out a futures  position,  and in the
event of adverse price movements, we would continue to be required to make daily
cash payments marking our position to market.  However,  since futures contracts
would have been used to hedge portfolio securities and such securities would not
be sold until the  futures  contracts  had been  terminated,  an increase in the
price of the  securities,  if any, may partially or completely  offset losses on
the futures contract.

We may incur  additional  brokerage  commissions  through  entering into futures
contracts,  although we also can save on  commissions  by hedging  through  such
contracts  rather  than  through  buying or  selling  individual  securities  in
anticipation  of market moves.  Successful  use by us of futures  contracts will
depend upon Lord Abbett's  ability to predict  movements in the direction of the
over-the-counter   market  generally,   which  requires   different  skills  and
techniques than predicting changes in the prices of individual stocks.

Segregated  Accounts  (Developing Growth Fund). To the extent required to comply
with  Securities  and  Exchange  Commission  Release  10666 and any  related SEC
policies,  when  purchasing  a  futures  contract,  or  writing  a  put  option,
Developing  Growth Fund will  maintain in a  segregated  account at it custodian
bank cash, U.S. Government and other permitted securities to cover its position.


                                       5


<PAGE>



                                       2.
                             Directors and Officers

The Board of Directors of each Fund is  responsible  for the  management  of the
business and affairs of each Fund.

The following  director is a partner of Lord,  Abbett & Co. ("Lord Abbett"),  90
Hudson Street,  Jersey City, New Jersey 07302-3973.  He has been associated with
Lord Abbett for over five years and is also an  officer,  director or trustee of
the thirteen other Lord Abbett-sponsored funds.


*Robert S. Dow, age 55, Chairman and President
*Mr. Dow is an "interested person" as defined in the Act.


The following outside directors are also directors or trustees of thirteen other
Lord Abbett-sponsored funds referred to above.

E. Thayer Bigelow, Director
245 Park Avenue, Suite 2414
New York, New York


Senior Adviser, Time Warner Inc.(since 1998).  Formerly,  Acting Chief Executive
Officer of Courtroom Television Network (1997 - 1998).  Formerly,  President and
Chief Executive  Officer of Time Warner Cable  Programming,  Inc. (1991 - 1997).
Prior to that,  President and Chief Operating  Officer of Home Box Office,  Inc.
Age 58.

William H. T. Bush, Director
Bush-O'Donnell & Co., Inc.
101 South Hanley Road, Suite 1025
St. Louis, Missouri

Co-founder   and  Chairman  for  the  Board  of  financial   advisory   firm  of
Bush-O'Donnell & Company (since 1986). Age 61.

Robert B. Calhoun, Jr., Director
Monitor Clipper Partners
650 Madison Avenue, 9th Floor
New York, New York

Managing  Director of Monitor Clipper Partners (since 1997) and President of The
Clipper Group L.P., both private equity investment funds (since 1990). Age 57.

Stewart S. Dixon, Director
Wildman, Harrold, Allen & Dixon
225 W. Wacker Drive (Suite 2800)
Chicago, Illinois

Partner in the law firm of Wildman, Harrold, Allen & Dixon (since 1990). Age 69.

John C. Jansing, Director
162 S. Beach Road
Hobe Sound, Florida

Retired. Former Chairman of Independent Election Corporation of America, a proxy
tabulating firm. Age 74.


                                       6


<PAGE>

C. Alan MacDonald, Director
415 Round Hill Road
Greenwich, Connecticut


Currently involved in golf development  management on a consultancy basis (since
1999).  Formerly,  Managing Director of The Directorship  Inc., a consultancy in
board  management and corporate  governance  (1997-1999).  Prior to that General
Partner of The Marketing Partnership,  Inc., a full service marketing consulting
firm  (1994 - 1997).  Prior to that,  Chairman  and Chief  Executive  Officer of
Lincoln Snacks,  Inc.,  manufacturer  of branded snack foods (1992 - 1994).  His
career  spans 36 years at  Stouffers  and Nestle  with  eighteen of the years as
Chief Executive Officer.  Currently serves as Director of DenAmerica Corp., J.B.
Williams Company, Inc., Fountainhead Water Company and Exigent Diagnostics.  Age
66.

Hansel B. Millican, Jr., Director
Rochester Button Company
1328 Broadway (Suite 816)
New York, New York

President and Chief Executive  Officer of Rochester Button Company (since 1991).
Currently serves as Director of Polyvision. Age 71.

Thomas J. Neff, Director
Spencer Stuart
277 Park Avenue
New York, New York

Chairman of Spencer Stuart,  an executive  search  consulting firm (since 1976).
Currently serves as Director of Ace, Ltd. (NYSE) Age 62.

     For the  Fiscal  Year Ended  January  31,  2000  (Developing Growth  Fund)
     For the Fiscal  Year Ended  December  31, 1999 (Bond-Debenture Fund)
     For the Fiscal Year Ended December 31, 1999 (Mid-Cap Value Fund)

The following table sets forth the compensation  accrued for each Fund's outside
directors.


                           Aggregate
                           Compensation
                           Accrued by
Name of Directors          each Fund/1
- -----------------          -----------
                           Developing           Bond-                   Mid-Cap
                           Growth               Debenture               Value
                           Fund                 Fund                    Fund
                           ----                 ----                    ----

E. Thayer Bigelow          $2,468              $ 9,758                $1,119
William H. T. Bush         $1,183              $ 4,675                $  536
Robert B. Calhoun, Jr.     $1,441              $ 5,695                $  653
Stewart S. Dixon           $2,430              $ 9,605                $1,102
John C. Jansing(4)         $2,387              $ 9,435                $1,082
C. Alan MacDonald          $2,365              $ 9,350                $1,073
Hansel B. Millican, Jr.    $2,387              $ 9,435                $1,082
Thomas J. Neff             $2,430              $ 9,605                $1,102


The  following  table  sets forth  information  with  respect to the  pension or
retirement  benefits  accrued  by all Lord  Abbett-sponsored  funds for  outside
directors/trustees.


                                       7


<PAGE>

                           Pension or Retirement Benefits
                           Accrued by each Fund and Thirteen
                           Other Lord Abbett-sponsored
Name of Directors          Funds/2
- -----------------          -------

E. Thayer Bigelow          $17,622
William H. T. Bush         $15,846
Robert B. Calhoun, Jr.     $12,276
Stewart S. Dixon           $32,420
John C. Jansing            $41,1084
C. Alan MacDonald          $26,763
Hansel B. Millican, Jr.    $37,822
Thomas J. Neff             $20,313


   The  following  table  sets  forth  the total  compensation  paid by all Lord
   Abbett-sponsored funds to the outside directors/trustees, and amounts payable
   but  deferred  at the option of the  director/trustee,  but does not  include
   amounts  accrued under the third  column.  No  director/trustee  of the Funds
   associated  with  Lord  Abbett  and no  officer  of the  Funds  received  any
   compensation from the Funds for acting as a director/trustee or officer.



                                    For Year Ended December 31, 1999
                                    Total Compensation Paid by each Fund
                                    and Thirteen Other Lord Abbett-sponsored
Name of Directors                   Funds/3
- -----------------                   -------


E. Thayer Bigelow                   $57,720
William H. T. Bush                  $58,000
Robert B. Calhoun                   $57,000
Stewart S. Dixon                    $58,500
John C. Jansing                     $57,250
C. Alan MacDonald                   $57,500
Hansel B. Millican, Jr.             $57,500
Thomas J. Neff                      $59,660


1.   Outside  directors'/trustees' fees, including attendance fees for board and
     committee  meetings,  are allocated among all Lord  Abbett-sponsored  funds
     based on the net assets of each Fund.  A portion of the fees payable by the
     Fund  to its  outside  directors/trustees  may  be  deferred  under  a plan
     ("equity-based  plan")  that deems the  deferred  amounts to be invested in
     shares of each Fund for later distribution to the  directors/trustees.  The
     amounts of the  aggregate  compensation  payable by each Fund in accordance
     with the  equity-based  plan as of its most  recent  fiscal year end deemed
     invested in Fund shares,  including dividends reinvested and changes in net
     asset value  applicable to such deemed  investments,  were as follows:  The
     amounts of the aggregate compensation payable by the Developing Growth Fund
     as of January 31, 2000 deemed invested in Fund shares,  including dividends
     reinvested  and  changes  in net  asset  value  applicable  to such  deemed
     investments,  were: Mr. Bigelow,  $3,724; Mr. Dixon,  $29,166; Mr. Jansing,
     $65,878;  Mr. MacDonald,  $22,129;  Mr. Millican,  $ 67,603 and Mr. Neff, $
     68,005.  If the amounts  deemed  invested in Fund shares were added to each
     director's  actual  holdings of Fund shares as of January  31,  1999,  each
     would own, the following: Mr. Bigelow, 260 shares; Mr. Dixon, 3,125 shares;
     Mr. Jansing,  22,764 shares;  Mr.  MacDonald,  1,550 shares;  Mr. Millican,
     4,737 shares; and Mr. Neff, 8,420 shares.


                                       8


<PAGE>

     The amounts of the  aggregate  compensation  payable by the  Bond-Debenture
     Fund as of  December  31, 1999 deemed  invested in Fund  shares,  including
     dividends  reinvested  and  changes in net asset value  applicable  to such
     deemed investments,  were: Mr. Bigelow, $ 31,694; Mr. Calhoun,  $5,735; Mr.
     Dixon, $ 32,763;  Mr. Jansing,  $ 100,161;  Mr.  MacDonald,  $ 41,389;  Mr.
     Millican, $ 100,939 and Mr. Neff, $ 103,424. If the amounts deemed invested
     in Fund shares were added to each director's actual holdings of Fund shares
     as of December 31, 1998, each would own, the following:  Mr. Bigelow, 3,353
     shares;  Mr. Calhoun,  607 shares;  Mr. Dixon,  3,467 shares;  Mr. Jansing,
     10,599 shares; Mr. MacDonald,  4,379 shares;  Mr. Millican,  10,681 shares;
     and Mr. Neff, 10,944 shares.


     The amounts of the  aggregate  compensation  payable by Mid-Cap Value as of
     December 31, 1999 deemed  invested in company shares,  including  dividends
     reinvested  and  changes  in net  asset  value  applicable  to such  deemed
     investments,  were: Mr. Bigelow,  $4,687; Mr. Dixon,  $26,673; Mr. Jansing,
     $61,420;  Mr.  MacDonald,  $20,483;  Mr. Millican,  $63,087;  and Mr. Neff,
     $63,325.  If the amounts deemed  invested in Fund shares were added to each
     director's  actual  holdings of Fund  shares as of  December  31, 1998 each
     would own, the following:  Mr. Bigelow, 0 shares; Mr. Dixon, 31 shares; Mr.
     Jansing, 4,631 shares; Mr. MacDonald, 0 shares; Mr. Millican, 0 shares; and
     Mr. Neff, 915 shares.


2.   This  column  indicates  the amounts  accrued by the Lord  Abbett-sponsored
     funds for the twelve months ended October 31, 1999.


3.   This shows aggregate compensation,  including  directors/trustees' fees and
     attendance fees for board and committee  meetings,  of a nature referred to
     in footnote one, accrued by the Lord Abbett-sponsored funds during the year
     ended December 31, 1999, including fee  directors/trustees'  have chosen to
     defer but does not include amounts accrued under the equity-based plan.


4.   The equity-based plans superseded a previously approved retirement plan for
     all directors/trustees.  Directors/trustees had the option to convert their
     accrued  benefits  under the retirement  plan.  All of the current  outside
     directors/trustees  except one made such an election.  Mr. Jansing chose to
     continue to receive benefits under the retirement plan, which provides that
     outside  directors/trustees may receive annual retirement benefits for life
     equal to their final annual retainer  following  retirement at or after age
     72 with at least ten years of service.  Thus, if Mr. Jansing were to retire
     and the annual retainer  payable by the Funds were the same as it is today,
     he would receive annual retirement benefits of $50,000.

Except where indicated,  the following executive officers of the Funds have been
associated  with Lord  Abbett  for over five  years.  Messrs.  Carper,  Hilstad,
Morris,  and Walsh are partners of Lord Abbett;  the others are employees.  None
have received compensation from the Funds.

Executive Vice Presidents:
Stephen  J. McGruder, age 55 (Developing Growth Fund)
Christopher Towle, age 42 (Bond-Debenture Fund)
Edward  K. von der Linde, age  39 (Mid-Cap Value Fund)


Vice Presidents:
Paul A. Hilstad,  age 57, Vice  President  and Secretary  (all Funds) (with Lord
Abbett  since 1995 - formerly  Senior  Vice  President  and  General  Counsel of
American Capital Management & Research, Inc.)


Thomas J. Baade,  age 35  (Bond-Debenture  Fund) (with Lord Abbett  since 1998 -
formerly Vice President of Smith Barney from 1990 to 1998)


Zane Brown, age 48 (Bond-Debenture Fund)


Joan A. Binstock,  age 46 (with Lord Abbett since 1999, formerly Chief Operating
Officer of Morgan Grenfell from 1996 to 1999, prior thereto Principal of Ernst &
Young LLP)


                                       9


<PAGE>

Daniel E. Carper, age 48 (all Funds)


Michael S. Goldstein, age 31 (with Lord Abbett since 1997 - formerly involved in
Fixed Income trading and analysis at BEA Associated and Portfolio  Administrator
for The Chase Manhattan Bank (Bond-Debenture Fund)


Howard Hansen, age 37 (Mid-Cap Value Fund)


Cinda C.  Hughes,  age 36  (Developing  Growth)  (with Lord Abbett  since 1998 -
formerly  Director,  Equity Research of Phoenix Duff & Phelps from 1996 to 1998;
prior thereto Analyst, PaineWebber from 1993 to 1996)


Thomas W. In, age 31 (Developing Growth) (with Lord Abbett since 1997 - formerly
Assistant Vice President of Deutsche Morgan Grenfell from 1994 to 1997)


Lawrence H.  Kaplan,  age 43 (all Funds) (with Lord Abbett since 1997 - formerly
Vice President and Chief Counsel of Salomon  Brothers Asset Management Inc. from
1995 to 1997; prior thereto, Senior Vice President, Director and General Counsel
of Kidder Peabody Asset Management, Inc.)


Robert G. Morris, age 55 (Bond-Debenture Fund, Mid-Cap Value Fund)


A. Edward Oberhaus III, age 40 (all Funds)


Tracie E. Richter, 32 (with Lord Abbett since 1999, formerly Vice President head
of Fund Administration of Morgan Grenfell from 1998 to 1999, Vice President - of
Bankers Trust from 1996 to 1998, prior thereto tax associate of Goldman Sachs).


Richard S. Szaro, age 55 (Bond-Debenture Fund)


John J. Walsh, age 63 (all Funds)

Treasurer:

Donna M.  McManus,  age 39 (all Funds)  Treasurer  (with Lord Abbett since 1996,
formerly a Senior Manager at Deloitte & Touche LLP).


As of April 15, 2000,  our officers and  directors as a group owned less than 1%
of each  Fund's  outstanding  shares  the  record  holders of 5% or more of each
Fund's outstanding shares are as follows:

The  Funds'  By-Laws  provide  that a Fund  shall not hold  annual  meetings  of
stockholders  in any year unless one or more matters are required to be acted on
by  stockholders  under the Act, as amended (the "Act"),  or unless  called by a
majority of a Board of Directors or by stockholders holding at least one quarter
of the stock of a Fund outstanding and entitled to vote at the meeting. When any
such annual meeting is held, the  stockholders  will elect directors and vote on
the approval of the independent auditors of a Fund.

                                       3.
                     Investment Advisory and Other Services

As described under  "Management"  in the  Prospectus,  Lord Abbett is the Funds'
investment manager.  The general partners of Lord Abbett who are officers and/or
directors of the Funds are as follows:  Zane E. Brown; Daniel E. Carper;  Robert
S. Dow; Paul A. Hilstad; Stephen J. McGruder;  Robert G. Morris;  Christopher J.
Towle; and John J. Walsh.

The other  general  partners  are:  Stephen I. Allen,  John E. Erard,  Robert P.
Fetch,  Daria L.  Foster,  Robert  I.  Gerber,  W.  Thomas  Hudson,  Michael  B.
McLaughlin,  Robert J.  Noelke,  and R. Mark  Pennington.  The  address  of each
partner is 90 Hudson Street, Jersey City, New Jersey 07302-3973.

The services  performed by Lord Abbett are described  under  "Management" in the
Prospectus.

Under the Management Agreement,  Developing Growth Fund is obligated to pay Lord
Abbett a monthly fee,  based on average daily net assets for each month,  at the
annual  rate of .75 of 1% of the  portion  of our net  assets  not in  excess of
$100,000,000  and  .50 of 1% of  such  assets  over  $100,000,000.  This  fee is
allocated  among all class shares based on each class'  proportionate  shares of
such average daily net assets. For the fiscal years ended January 31, 2000, 1999
and 1998,  the  management  fees paid to Lord Abbett  amounted  to  $10,423,188,
$4,444,605, and $2,325,894, respectively.


                                       10


<PAGE>

Under its  Management  Agreement,  Bond-Debenture  Fund is obligated to pay Lord
Abbett a monthly fee,  based on average daily net assets for each month,  at the
annual rate of .50 of 1% of the Fund's first $500  million of average  daily net
assets and .45% of such assets over $500  million.  This fee is allocated  among
all classes based on each class'  proportionate shares of such average daily net
assets.  For the fiscal  years  ended  December  31,  1999,  1998 and 1997,  the
management  fees  paid  to Lord  Abbett  by  Bond-Debenture  Fund  amounted  to,
$17,075,989, $14,835,355 and $11,621,344, respectively.

Under its  Management  Agreement,  Mid-Cap  Value Fund is  obligated to pay Lord
Abbett a monthly  fee,  based on average  daily net assets at the annual rate of
 .75 of 1% on the first $200 million; .65 of 1% on the next $300 million; and .50
of 1% on the excess over $500 million.  For the fiscal years ended  December 31,
1999,  1998 and 1997, the  management  fees paid to Lord Abbett by Mid-Cap Value
Fund amounted to $2,792,854, $2,693,928 and $2,102,611.

We pay all expenses not  expressly  assumed by Lord  Abbett,  including  without
limitation  12b-1 expenses,  outside  directors' fees and expenses,  association
membership  dues,  legal  and  auditing  fees,  taxes,   transfer  and  dividend
disbursing  agent  fees,  shareholder  servicing  costs,  expenses  relating  to
shareholder  meetings,  expenses  of  preparing,   printing  and  mailing  stock
certificates and shareholder  reports,  expenses of registering our shares under
federal and state securities laws,  expenses of preparing,  printing and mailing
prospectuses to existing shareholders,  insurance premiums,  brokerage and other
expenses connected with executing portfolio security transactions.

Lord Abbett  Distributor LLC, A New York limited liability company ("Lord Abbett
Distributor"),  and a subsidiary of Lord Abbett, 90 Hudson Street,  Jersey City,
New Jersey 07302, serves as the principal underwriter for the Funds.

Deloitte & Touche LLP, Two World Financial Center, New York, New York 10281, are
the independent  auditors of the Funds and must be approved at least annually by
the Board of  Directors  to  continue  in such  capacity.  Deloitte & Touche LLP
perform audit  services for the Funds,  including the  examination  of financial
statements included in our Annual Report to Shareholders.

The Bank of New York ("BNY"),  48 Wall Street,  New York, New York 10286, is the
Funds'  custodian.  In accordance with the  requirements of Rule 17f-5 under the
Act, the Funds'  directors  have  approved  arrangements  permitting  the Funds'
foreign  assets not held by BNY or its  foreign  branches  to be held by certain
qualified foreign banks and depositories.


United Missouri Bank of Kansas City, N.A., Tenth and Grand, Kansas City,
Missouri, acts as the transfer agent and dividend disbursing agent for the Fund.

                                       4.
                             Portfolio Transactions

Our policy is to obtain best execution on all our portfolio transactions,  which
means that we seek to have purchases and sales of portfolio  securities executed
at the  most  favorable  prices,  considering  all  costs  of  the  transaction,
including brokerage commissions and dealer markups and markdowns and taking into
account the full range and quality of the  brokers'  services.  Consistent  with
obtaining  best  execution,  we  generally  pay, as  described  below,  a higher
commission than some brokers might charge on the same  transactions.  Our policy
with respect to best  execution  governs the selection of brokers or dealers and
the market in which the transaction is executed. To the extent permitted by law,
we may, if considered advantageous, make a purchase from or sale to another Lord
Abbett-sponsored fund without the intervention of any broker-dealer.

Broker-dealers  are selected on the basis of their  professional  capability and
the value and quality of their brokerage and research  services.  Normally,  the
selection is made by traders who are officers of the Fund and also are employees
of Lord  Abbett.  These  traders  do the  trading  as well  for  other  accounts
- --investment  companies (of which they are also  officers) and other  investment
clients -- managed by Lord  Abbett.  They are  responsible  for  obtaining  best
execution.


                                       11


<PAGE>

We pay a  commission  rate  that we  believe  is  appropriate  to  give  maximum
assurance  that our brokers  will provide us, on a  continuing  basis,  with the
highest level of brokerage services  available.  While we do not always seek the
lowest possible commissions on particular trades, we believe that our commission
rates are in line with the rates that many other  institutions  pay. Our traders
are  authorized  to pay  brokerage  commissions  in excess of those  that  other
brokers might accept on the same transactions in recognition of the value of the
services  performed  by the  executing  brokers,  viewed in terms of either  the
particular  transaction  or the  overall  responsibilities  of Lord  Abbett with
respect to us and the other accounts they manage.  Such services include showing
us trading  opportunities  including  blocks,  a willingness and ability to take
positions in  securities,  knowledge of a particular  security or market  proven
ability to handle a particular type of trade, confidential treatment, promptness
and reliability.

Some of these brokers also provide research  services at least some of which are
useful to Lord Abbett in their overall  responsibilities  with respect to us and
the other accounts they manage. Research includes the furnishing of analyses and
reports concerning issuers, industries, securities, economic factors and trends,
portfolio  strategy and the  performance  of accounts and trading  equipment and
computer software  packages,  acquired from third-party  suppliers,  that enable
Lord Abbett to access various information  databases.  Such services may be used
by Lord Abbett in servicing  all their  accounts,  and not all of such  services
will  necessarily be used by Lord Abbett in connection with their  management of
the Funds;  conversely,  such services furnished in connection with brokerage on
other  accounts  managed  by Lord  Abbett may be used in  connection  with their
management of the Funds,  and not all of such services will  necessarily be used
by Lord  Abbett  in  connection  with  their  advisory  services  to such  other
accounts.  We have been advised by Lord Abbett that research  services  received
from brokers cannot be allocated to any particular account, are not a substitute
for Lord Abbett's services but are supplemental to their own research effort and
when utilized, and are subject to internal analysis before being incorporated by
Lord Abbett into their investment  process.  As a practical matter, it would not
be  possible  for Lord  Abbett  to  generate  all of the  information  presently
provided by brokers. While receipt of research services from brokerage firms has
not reduced  Lord  Abbett's  normal  research  activities,  the expenses of Lord
Abbett could be materially increased if it attempted to generate such additional
information  through its own staff and  purchased  such  equipment  and software
packages directly from the suppliers.

No commitments  are made  regarding the  allocation of brokerage  business to or
among brokers, and trades are executed only when they are dictated by investment
decisions of the Funds to purchase or sell portfolio securities.

If two or more  broker-dealers are considered capable of offering the equivalent
likelihood of best execution,  the  broker-dealer who has sold our shares and/or
shares of other Lord Abbett-sponsored  funds may be preferred.  If other clients
of  Lord  Abbett  buy or sell  the  same  security  at the  same  time as we do,
transactions   will,  to  the  extent   practicable,   be  allocated  among  all
participating  accounts  in  proportion  to the amount of each order and will be
executed  daily until filled so that each account  shares the average  price and
commission  cost of each day.  Other  clients  who direct  that their  brokerage
business be placed with  specific  brokers or who invest  through wrap  accounts
introduced to Lord Abbett by certain brokers may not participate  with us in the
buying and selling of the same  securities as described  above. If these clients
wish to buy or sell the same security as we do, they may have their transactions
executed at times different from our  transactions  and thus may not receive the
same  price  or  incur  the  same  commission  cost as we do.


During the fiscal years ended January 31, 1999, 1998 and 1997, Developing Growth
Fund  paid  total  commissions  to  independent  broker-dealers  of  $4,920,536,
$1,930,696 and $1,696,590, respectively.


During  the  fiscal  years  ended   December  31,  1998,   1997  and  1996,  the
Bond-Debenture  Fund paid total  commissions  to independent  broker-dealers  of
$19,393,923, $14,773,720 and $8,760,174, respectively.


During the fiscal years ending  December  31, 1998,  1997 and 1996,  the Mid-Cap
Value Fund paid total  commissions to independent  broker-dealers of $1,258,888,
$992,190 and $554,002, respectively.


                                       12


<PAGE>

                                       5.
                             Purchases, Redemptions
                            and Shareholder Services

The Funds value their  portfolio  securities  at market value as of the close of
the NYSE.  Market  value will be  determined  as follows:  securities  listed or
admitted to trading  privileges on the New York or American Stock Exchange or on
the NASDAQ  National  Market  System are valued at the last sales price,  or, if
there is no sale on that day, at the mean between the last bid and asked prices,
or, in the case of bonds, in the over-the-counter  market if, in the judgment of
a Fund's officers,  that market more accurately reflects the market value of the
bonds.  Over-the-counter  securities  not traded on the NASDAQ  National  Market
System are valued at the mean between the last bid and asked prices.  Securities
for which market  quotations  are not  available are valued at fair market value
under procedures approved by the Board of Directors.

Information  concerning  how we value our shares for the purchase and redemption
of  our  shares  is  described  in  the   Prospectus   under   "Purchases"   and
"Redemptions," respectively.

As  disclosed  in the  Prospectus,  we  calculate  our net  asset  value and are
otherwise  open for business on each day that the NYSE is open for trading.  The
NYSE is closed on Saturdays and Sundays and the following holidays -- New Year's
Day, Martin Luther King, Jr. Day,  Presidents'  Day, Good Friday,  Memorial Day,
Independence Day, Labor Day, Thanksgiving and Christmas.

The net asset  value per share  for the  Class Y shares  will be  determined  by
taking Class Y shares (net assets  divided by shares  outstanding).  Our Class Y
shares will be offered at net asset value.

The Funds have entered into distribution agreements with Lord Abbett Distributor
LLC, a New York limited  liability  company and  subsidiary of Lord Abbett under
which Lord  Abbett  Distributor  is  obligated  to use its best  efforts to find
purchasers for the shares of the Funds,  and to make reasonable  efforts to sell
Fund shares so long as, in Lord Abbett  Distributor's  judgment,  a  substantial
distribution can be obtained by reasonable efforts.

CLASS Y  SHARE  EXCHANGES.  The  Prospectus  describes  the  Telephone  Exchange
Privilege.  You may  exchange  some or all of your  Class Y shares  for  Class Y
shares of any other eligible Lord Abbett-sponsored fund currently offering Class
Y shares to the  public.  Currently  those  other  funds  consist of Lord Abbett
Affiliated Fund, Inc., Lord Abbett Research Fund, Inc. - Small-Cap Research Fund
and Growth  Opportunities  Fund,  Lord Abbett  Securities  Trust - International
Fund,  and  Lord  Abbett  Investment  Trust - High  Yield  Fund,  Core  Fund and
Strategic Core Fund.

REDEMPTIONS.  A  redemption  order is in proper form when it contains all of the
information and  documentation  required by the order form or  supplementally by
Lord Abbett  Distributor or the Funds to carry out the order.  The  signature(s)
and any legal  capacity  of the  signer(s)  must be  guaranteed  by an  eligible
guarantor. See the Prospectus for expedited redemption procedures.

The right to redeem and receive payment, as described in the Prospectus,  may be
suspended if the NYSE is closed  (except for  weekends or  customary  holidays),
trading on the NYSE is  restricted  or the  Securities  and Exchange  Commission
deems an emergency to exist.

Our Boards of Directors  for the Funds may  authorize  redemption  of all of the
shares  in any  account  in  which  there  are  fewer  than  25  shares.  Before
authorizing such redemption, the Board must determine that it is in our economic
best interest or necessary to reduce  disproportionately  burdensome expenses in
servicing  shareholder  accounts. At least 30 days' prior written notice will be
given  before any such  redemption,  during  which time  shareholders  may avoid
redemption by bringing their accounts up to the minimum set by the Board.

                                       6.
                                Past Performance


                                       13


<PAGE>

The Fund computes the average annual compounded rate of total return for Class Y
shares during specified periods that would equate the initial amount invested to
the ending  redeemable  value of such  investment  by adding one to the computed
average  annual total return,  raising the sum to a power equal to the number of
years  covered by the  computation  and  multiplying  the result by one thousand
dollars,  which represents a hypothetical  initial  investment.  The calculation
assumes  applicable  sales charge deduction from the initial amount invested and
reinvestment  of all income  dividends  and capital gains  distributions  on the
reinvestment dates at prices calculated as stated in the Prospectus.  The ending
redeemable  value is determined by assuming a complete  redemption at the end of
the period(s) covered by the total return computation for the period.

In calculating total returns for Class Y shares no sales charge is deducted from
the initial investment and the return is shown at net asset value. Total returns
also assume that all dividends and capital gains distributions during the period
are reinvested at net asset value per share, and that the investment is redeemed
at the end of the period.

Class Y share  performance.  Using the computation  method  described above, the
Developing Growth Fund's annual total return for the year ended January 31, 1999
and the period of inception  (December  30, 1997) to January 31, 1998 was 14.59%
and  1.06%  (non-annualized),  respectively,  and for  Bond-Debenture  Fund  the
non-annualized  total  return for the period of  inception  (March 27,  1998) to
December 31, 1998 was .55%.

These figures represent past  performance,  and an investor should be aware that
the investment return and principal value of a Fund investment will fluctuate so
that an investor's shares,  when redeemed,  may be worth more or less than their
original cost.  Therefore,  there is no assurance that this  performance will be
repeated in the future.

                                       7.
                                      Taxes

The value of any shares redeemed each Fund or otherwise sold may be more or less
than your tax basis in the shares at the time of disposition. Any gain generally
will be taxable  for  federal  income tax  purposes.  Any loss  realized  on the
disposition  of a Fund's  shares which you have held for six months or less will
be treated for tax  purposes as a  long-term  capital  loss to the extent of any
capital  gains  distributions  which you  received  with respect to such shares.
Losses on the sale of shares are not deductible if, within a period beginning 30
days  before the date of the sale and ending 30 days after the date of the sale,
the taxpayer acquires shares that are substantially identical.

A Fund may be subject to foreign  withholding taxes which would reduce the yield
on its investments. It is generally expected that shareholders of a Fund who are
subject to United  States  federal  income tax will not be  entitled  to claim a
federal  income tax credit or  deduction  for foreign  income taxes paid by such
Funds.

Gain and loss  realized by a Fund on certain  transactions,  including  sales of
foreign debt securities and certain  transactions  involving  foreign  currency,
will be treated as ordinary  income or loss for federal  income tax  purposes to
the extent,  if any,  that such gains or losses are  attributable  to changes in
exchange rates for foreign  currencies.  Accordingly,  distributions  taxable as
ordinary  income will include the net amount,  if any, of such foreign  exchange
gains and will be reduced by the net amount,  if any, of such  foreign  exchange
losses.

If a Fund purchase shares in certain foreign investment  entities called "PFICs"
or "passive  foreign  investment  companies," it may be subject to United States
federal  income tax on a portion of any "excess  distribution"  or gain from the
disposition  of such  shares,  even if such income is  distributed  as a taxable
dividend by the Fund to its  shareholders.  Additional  charges in the nature of
interest  may be imposed on either  the Fund or its  shareholders  in respect of
deferred taxes arising from such  distributions or gains. If a Fund were to make
a "qualified electing fund" election with respect to its investment in a passive
foreign  investment  company in lieu of the  foregoing  requirements,  such Fund
might be  required  to  include in income  each year a portion  of the  ordinary
earnings and net capital  gains of the  qualified  electing  fund,  even if such
amount were not distributed to such Fund.

Each Fund will be subject to a 4%  nondeductible  excise tax on certain  amounts
not distributed on treated as having been distributed on a timely basis calendar
year.  Each Fund  intends  to  distribute  to  shareholders  each year an amount
adequate to avoid the imposition of such excise tax.

Dividends paid by a Fund will qualify for the  dividends-received  deduction for
corporations,  to the extent they are derived  from  dividends  paid by domestic
corporations.

The  foregoing  discussion  relates  solely to U.S.  Federal  income  tax law as
applicable to United States  persons  (United  States  citizens or residents and
United States domestic  corporations,  partnerships,  trusts and estates).  Each
shareholder  who is not a United States  person  should  consult his tax adviser
regarding the U.S. and foreign tax  consequences of the ownership of shares of a
Fund,  including a 30% (or lower treaty rate) United States  withholding  tax on
dividends representing ordinary income and net short-term capital gains, and the
applicability of United States gift and estate taxes.


                                       8.
                           Information About the Funds

Our Boards of Directors have authority to create and classify shares in separate
series, without further action by shareholders. To date, the Boards of Directors
have   authorized   five   classes  of  shares  for   Developing   Growth  Fund,
Bond-Debenture  Fund, and Mid-Cap Value Fund (Class A, B, C, P and Y). The Board
of a Fund will allocate a Fund's shares among its classes from time to time. All
shares of a Fund have equal  noncumulative  voting  rights and equal rights with
respect to dividends, assets and liquidation,  except for certain class-specific
expenses.  They  are  fully  paid  and  nonassessable  when  issued  and have no
preemptive  or  conversion  rights.  Although  no present  plans exist to do so,
further  series  may be added to one or more of the  Funds  in the  future.  The
Investment Company Act of 1940, as amended (the "Act"), requires that where more
than one series exists for a Fund,  each series must be preferred over all other
series in respect of assets specifically allocated to such series.


Rule 18f-2 under the Act provides that any matter  required to be submitted,  by
the provisions of the Act or applicable  state law or otherwise,  to the holders
of the outstanding  voting securities of an investment  company such as the Fund
shall not be deemed to have been  effectively  acted upon unless approved by the
holders of a majority of the outstanding shares of each class or series affected
by such  matter.  Rule 18f-2  further  provides  that a class or series shall be
deemed to be affected by a matter  unless the  interests of each class or series
in the  matter are  substantially  identical  or the matter  does not affect any
interest of such class or series.  However,  the Rule  exempts the  selection of
independent  public  accountants,  the  approval of a contract  with a principal
underwriter and the election of directors from its separate voting requirements.

The directors and officers of Lord Abbett-sponsored  mutual funds, together with
the partners and  employees of Lord Abbett,  are  permitted to purchase and sell
securities  for their  personal  investment  accounts.  In  engaging in personal
securities  transactions,  however, such persons are subject to requirements and
restrictions  contained  in  the  Fund's  Code  of  Ethics  which  complies,  in
substance,   with  each  of  the   recommendations  of  the  Investment  Company
Institute's  Advisory Group on Personal Investing.  Among other things, the Code
requires that Lord Abbett partners and employees  obtain advance approval before
buying or selling  securities,  submit  confirmations and quarterly  transaction
reports,  and obtain approval before becoming a director of any company;  and it
prohibits  such persons from  investing in a security seven days before or after
any Lord Abbett-sponsored fund or Lord Abbett-managed  account considers a trade
or trades in such security, from profiting on trades of the same security within
60 days and from  trading  on  material  and  non-public  information.  The Code
imposes  certain  similar  requirements  and  restrictions  on  the  independent
directors of each Lord  Abbett-sponsored  mutual fund to the extent contemplated
by the recommendations of the Advisory Group.

                                       9.
                              Financial Statements


                                       14


<PAGE>

The  financial  statements  for the fiscal  year ended  January 31, 2000 and the
report  of  Deloitte  & Touche  LLP,  independent  auditors,  on such  financial
statements  contained in the 2000 Annual Report to  Shareholders  of Lord Abbett
Developing  Growth  Fund,  Inc.  are  incorporated  herein by  reference to such
financial  statements  and report,  in reliance upon the authority of Deloitte &
Touche LLP as experts in auditing and accounting.


The  financial  statements  for the fiscal year ended  December 31, 1999 and the
report  of  Deloitte  & Touche  LLP,  independent  auditors,  on such  financial
statements  contained in the 1999 Annual Report to  Shareholders  of Lord Abbett
Bond-Debenture Fund, Inc. are incorporated herein by reference to such financial
statements  and report,  in reliance upon the authority of Deloitte & Touche LLP
as experts in auditing and accounting.


The  financial  statements  for the fiscal year ended  December 31, 1999 and the
report  of  Deloitte  & Touche  LLP,  independent  auditors,  on such  financial
statements  contained in the 1999 Annual Report to  Shareholders  of Lord Abbett
Mid-Cap Value Fund, Inc. are incorporated  herein by reference to such financial
statements  and report,  in reliance upon the authority of Deloitte & Touche LLP
as experts in auditing and accounting.


<PAGE>


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