LORD ABBETT MID CAP VALUE FUND INC
485APOS, 1999-03-01
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                                                      1933 Act File No. 2-82544
                                                      1940 Act File No. 811-3691

                        SECURITIES & EXCHANGE COMMISSION
                              Washington, D.C.20549

                                    FORM N-1A

           REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 |X|
 
                           Pre-Effective Amendment No.                     |X|
 
                         Post-Effective Amendment No. 19                   |X|
 
                                     and/or

             REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT       |X|
                                     OF 1940

                                Amendment No. 20                           |X|


                      LORD ABBETT MID-CAP VALUE FUND, INC.
                ------------------------------------------------
                Exact Name of Registrant as Specified in Charter

                  767 FIFTH AVENUE, NEW YORK, N. Y. 10153-0203
                  --------------------------------------------
                      Address of Principal Executive Office

                  Registrant's Telephone Number (212) 848-1800
                  --------------------------------------------

                         Thomas F. Konop, Vice President
                     767 FIFTH AVENUE, NEW YORK, N. Y. 10153
                     ---------------------------------------
                     (Name and Address of Agent for Service)

It is proposed that this filing will become effective (check appropriate box)

|_|    immediately on filing pursuant to paragraph (b)

|_|    on (date) pursuant to paragraph (b)

|X|    60 days after filing pursuant to paragraph (a) (1)

|_|    on (date) pursuant to paragraph (a) (1)

|_|    75 days after filing pursuant to paragraph (a) (2)

|_|    on (date) pursuant to paragraph (a) (2) of Rule 485

If appropriate, check the following box:

|_|   this post-effective amendment designates a new effective date for a
      previously filed post-effective amendment


                                       1
<PAGE>

                            ------------------------
                            Prospectus | May 1, 1999
                            ------------------------

                               Lord Abbett
                               Mid-Cap Value Fund

           FPO
[LOGO] LORD & ABBETT & C0.
       Investment Management
A Tradition of Performance Through Disciplined Investing

      As with all mutual funds, the Securities and Exchange Commission does not
      guarantee that the information in this prospectus is accurate or complete,
      and it has not judged this fund for its investment merit. It is a criminal
      offense to state otherwise.

      Class P shares of the fund are neither offered to the general public nor
      available in all states. Please call 800-821-5129 for further information.
<PAGE>

                               Table of Contents

                                    The Fund

                                                                            Page

            Information about past    Goal/Approach                           2
   performance, fees and  expenses    Main Risks                              2

                                Your Investment

          Information for managing    Purchases                               5
                 your fund account    Opening Your Account                    7
                                      Redemptions                             8
                                      Distributions And Taxes                 8
                                      Services For Fund Investors             9
                                      Sales Charges And Service Fees         10
                                      Management                             10

                              For More Information

                 How to learn more    Other Investment Techniques            11
                    about the fund    Glossary Of Shaded Terms               11
                                      Recent Performance                     14

                             Financial Information

                                       Financial Highlights                   15
                                       Compensation For Your Dealer           16

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



<PAGE>

                                    The Fund

GOAL / APPROACH

      The fund seeks capital appreciation. It does so by investing primarily in
      common stocks of mid-sized companies while using a value approach to
      investing. This means that it tries to identify bargain stocks. The fund
      generally focuses on companies with market capitalizations of roughly $500
      million to $5 billion. The fund selects stocks based on appreciation
      potential, without regard to current income.

      We try to identify companies that have the potential for significant
      market appreciation from 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

      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 prevent the fund from
      realizing its investment objective.

Main risks

      While stocks have historically been a leading choice of long-term
      investors, they fluctuate in price. The value of your investment in the
      fund will go up and down, which means that you could lose money.

      Our performance may sometimes be lower or higher than that of other types
      of funds (such as those emphasizing small-company stocks or growth
      stocks), or other funds of the same type. Different types of stocks tend
      to shift in out of favor depending on market and economic conditions.
      There is the risk that an investment may never reach what we think is its
      full value, or may go down in value, but our value approach might limit
      our downside risk because value stocks in theory are already underpriced.

      The fund is diversified, which means that with respect to 75% of its total
      assets, it will not purchase a security if, as a result, more than 5% of
      the fund's total assets would be invested in the securities of a single
      issuer or the fund would hold more than 10% of the outstanding voting
      securities of the issuer.

      An investment in the fund is not a bank deposit. It is not FDIC-insured or
      government-endorsed. It is not a complete investment program. You could
      lose money in this fund, but you also have the potential to make money.

We or the fund refers to Lord Abbett Mid-Cap Value Fund, Inc. ("Mid-Cap Value
Fund"), which operates under the supervision of its Board with the advice of
Lord, Abbett & Co. ("Lord Abbett"), it's investment manager.

About the fund. This fund is a mutual fund: a pooled investment that is
professionally managed and gives you the opportunity to participate in
securities markets. It strives to reach its stated goal, although as with all
mutual funds, it cannot guarantee results.

Bargain stocks are stocks of companies that appear under- priced according to
certain financial measurements of their intrinsic worth or business prospects.

Growth Stocks. Stocks which 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 bargain stocks.

Large companies are established companies that are considered "known
quantities." Large companies often have the resources to weather economic
shifts, though they can be slower to innovate than small companies.

Middle-sized companies usually have market capitalizations of roughly $500
million to $5 billion, but not less than $50 million.

Small-company stocks. Stocks of smaller companies which often are new and less
established, with a tendency to be faster-growing but more volatile than large
company stocks.

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


2 The Fund
<PAGE>

                               Mid-Cap Value Fund

                                                        Symbols: Class A - LAVLX
                                                                 Class B - LMCBX
                                                                 Class C - LMCCX

PAST PERFORMANCE

      The information below provides some indication of the risks of investing
      in the fund, showing changes in the fund's performance from calendar year
      to calendar year and by showing how the fund's average annual returns
      compare with those of a broad measure of market performance.

                                 AWAITING DATA

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

      The table below shows a comparison of the fund's class A, B and C average
      annual total return to that of the Russell Mid-Cap Index. Fund returns
      assume reinvestment of dividends and distributions and payment of the
      maximum applicable front-end or deferred sales charge. All periods end on
      December 31, 1998.

Class                        1 Year      5 Years      10 Years      Inception(i)

A                             0.00%       0.00%         0.00%          0.00%
- --------------------------------------------------------------------------------
B                             0.00%        --            --            0.00%
- --------------------------------------------------------------------------------
C                             0.00%        --            --            0.00%
- --------------------------------------------------------------------------------
Russell Mid-Cap Index(ii)     0.00%       0.00%         0.00%          0.00%
- --------------------------------------------------------------------------------

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

<TABLE>
<CAPTION>
                                                 Class A   Class B       Class C     Class P
<S>                                                <C>      <C>            <C>         <C>  
Shareholder Fees (Fees paid directly from your investment)
- --------------------------------------------------------------------------------------------
Maximum Sales Charge on Purchases
- --------------------------------------------------------------------------------------------
(as a % of offering price)                         5.75%    none           none        none
- --------------------------------------------------------------------------------------------
Maximum Deferred Sales Charge (See "Purchases")    none     5.00%(2)(5)    1.00%(3)    none
- --------------------------------------------------------------------------------------------
Annual Fund Operating Expenses (Expenses deducted from fund assets)
- --------------------------------------------------------------------------------------------
(as a % of average net assets)(1)
- --------------------------------------------------------------------------------------------
Management Fees (See "Management")                 0.75%    0.75%          0.75%       0.75%
- --------------------------------------------------------------------------------------------
Distribution and Service (12b-1 Fees)(4)           0.35%    1.00%          1.00%       0.45%
- --------------------------------------------------------------------------------------------
Other Expenses (See "Management")                  0.08%    0.08%          0.08%       0.08%
- --------------------------------------------------------------------------------------------
Total Operating Expenses                           0.73%    1.40%          1.40%       0.85%
- --------------------------------------------------------------------------------------------
</TABLE>

================================================================================
Expense example
- --------------------------------------------------------------------------------

This example, like that in other funds' prospectuses, assumes a $10,000 initial
investment at maximum sales charge, if any, 5% total return each year and no
changes in expenses. You pay the following expenses over the course of each
period shown if you sell your shares at the end of the period, although your
actual cost may be higher or lower. The expenses include any applicable
contingent deferred sales charges.

Share class                     1 Year     3 Years      5 Years       10 Years

Class A shares                   $700        $950        $1,220        $2,000
- --------------------------------------------------------------------------------
Class B shares(5)                $700        $930        $1,280        $2,130
- --------------------------------------------------------------------------------
Class C shares                   $300        $630        $1,080        $2,330
- --------------------------------------------------------------------------------
Class P shares                   $150        $460        $  790        $1,740
- --------------------------------------------------------------------------------

You would pay the following expenses on the same investment, assuming you kept
your shares.

Class A shares                   $700        $950        $1,220        $2,000
- --------------------------------------------------------------------------------
Class B shares(5)                $200        $630        $1,080        $2,130
- --------------------------------------------------------------------------------
Class C shares                   $200        $630        $1,080        $2,330
- --------------------------------------------------------------------------------
Class P shares                   $150        $460        $  790        $1,740
- --------------------------------------------------------------------------------

This example is for comparison and is not a representation of the fund's actual
expenses or returns, either past or present.

Past performance is not a prediction of future results.

- --------------------------------------------------------------------------------
(i)   The dates of inception for each class are: A -6/28/83; B -5/1/97; and C
      -5/1/97.

(ii)  Performance for the unmanaged Russell Mid-Cap Index does not reflect
      transaction costs or management fees. An investor cannot invest directly
      in the Russell Mid-Cap Index.

Management fees are payable to 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 transfer
agency, legal and share registration fees.

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

(2)   5.00% if shares are redeemed before 1st anniversary of purchase, declining
      to 1% before 6th anniversary and eliminated on and after 6th anniversary.

(3)   1.00% if shares are redeemed before 1st anniversary of purchase.

(4)   Because 12b-1 distribution fees (up to: 0.10%- class A; 0.75%- classes B
      and C; and 0.25%- class P) are paid out on an on-going basis, over time
      they will increase the cost of your investment and may cost you more than
      paying other types of sales charges. Service fees under each class's 12b-1
      Plan equal up to 0.25%, except 0.20% - class P.

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


                                                                      The Fund 3
<PAGE>

                                Your Investment

PURCHASES

      This prospectus offers four classes of shares, Class A, B, C and P. These
      classes of shares represent investments in the same portfolio of
      securities but are subject to different expenses. Our shares are
      continuously offered. The offering price is based on the Net Asset Value
      ("NAV") per share next determined after we receive your purchase order
      submitted in proper form. A front-end sales charge is added to the NAV, in
      the case of the class A shares. There is no front-end sales charge,
      although there is a CDSC in the case of the class B and 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.

================================================================================
Front-End Sales Charges - Class A Shares
- --------------------------------------------------------------------------------
                                                                  To Compute
                                As a % of       As a % of        Offering Price
Your Investment              Offering Price   Your Investment    Divide NAV by
- --------------------------------------------------------------------------------
Less than $50,000                 5.75%            6.10%             .9425
- --------------------------------------------------------------------------------
$50,000 to $99,999                4.75%            4.99%             .9525
- --------------------------------------------------------------------------------
$100,000 to $249,999              3.75%            3.90%             .9625
- --------------------------------------------------------------------------------
$250,000 to $499,999              2.75%            2.83%             .9725
- --------------------------------------------------------------------------------
$500,000 to $999,999              2.00%            2.04%             .9800
- --------------------------------------------------------------------------------
$1,000,000 and over               No Sales Charge                   1.0000
- --------------------------------------------------------------------------------

      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:

      o     Rights of Accumulation -- A Purchaser can apply the value (at public
            offering price) of the shares you already own to a new purchase of
            class A shares of any Eligible Fund in order to reduce the sales
            charge.

      o     Statement of Intention -- A Purchaser of class A shares can 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 statement of intention can be
            backdated 90 days. Current holdings under rights of accumulation can
            be included in a statement of intention.

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

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"). The fund
is open on those business days when the NYSE is open. Purchases and sales of
fund shares are executed at the NAV next determined after the fund receives your
order. In calculating NAV, securities for which market quotations are available
are valued at those quotations. Securities for with such quotations are not
available are valued at fair value under procedures approved by the Board.

Share classes

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

Class B
o     no front-end sales charge, how-ever, a contingent deferred sales charge is
      applied to shares sold prior to the sixth anniversary of purchase

o     higher annual expenses than class A shares

o     automatically convert to class A shares after eight years

Class C
o     no front-end sales charge

o     higher annual expenses than class A shares

o     a contingent deferred sales charge is applied to shares sold prior to the
      first anniversary of purchase

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


4 Your Investment
<PAGE>

      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:

      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 Advisory Program

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

      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.

      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:

      o     benefit payments such as Retirement Plan 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

      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                      Contingent Deferred Sales Charge
the day on which the                   on redemption (as % of amount
purchase order 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)   Anniversary is the 365th day subsequent to a purchase or a prior
      anniversary.

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

*     These categories may be subject to a Contingent Deferred Sales Charge
      ("CDSC").

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

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.

Benefit Payment Documentation.
(Class A only)
o     under $50,000 - no documentation necessary

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

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, whichever 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 determine if a CDSC applies to a redemption, the fund redeems shares in the
following order:

1.    shares acquired by reinvestment of dividends and capital gains

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 5
<PAGE>

      The class B share CDSC generally will be waived under any one of the
      following:

      o     benefit payments such as Retirement Plan 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 (natural person)

      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 your original purchase.

      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 Advisory
      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.

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

      For Retirement Plans and Mutual Fund Advisory 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 assure your order will be accepted.

      Mid-Cap Value Fund
      P.O. Box 419100
      Kansas City, MO 64141

      Proper Form. An order submitted directly to the fund must contain: (1) a
      completed application, and (2) payment by check. For more information
      regarding proper form of a purchase order, call the fund at 800-821-5129.
      Payment must be credited in U.S. dollars to our custodian bank's account.

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

Important Information. You may be subject to a $50 penalty under the Internal
Revenue Code if you do not provide a correct taxpayer identification number
(Social Security Number for individuals) or make certain required
certifications. In addition, we may be required to withhold from your account
and pay to the U.S. Treasury 31% of any redemption proceeds and any dividend or
distribution from your account.

6 Your Investment
<PAGE>


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 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 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. Redemption requests for shares
      initially purchased by check will not be honored for up to 15 days, unless
      we are assured that the check has cleared earlier.

      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 pays its shareholders dividends from its net investment income,
      and distributes net capital gains that it has realized. The fund expects
      that its dividends from investment income will be tax exempt and expects
      to pay such dividends to shareholders monthly. If a capital gain
      distribution is declared, it will be paid 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 are the same for all shareholders
      regardless of how long they have been in the fund and whether
      distributions are reinvested or paid in cash. In general, distributions
      are taxable as follows:

================================================================================
Federal Taxability Of Distributions

Type of                 Tax rate for taxpayer      Tax rate for taxpayer subject
distribution            subject to 15% bracket     to 28% bracket or above
- --------------------------------------------------------------------------------
Income                                             Ordinary
dividends               15%                        income rate
- --------------------------------------------------------------------------------
Short-term                                         Ordinary
capital gains           15%                        income rate
- --------------------------------------------------------------------------------
Long-term
capital gains           10%                        20%
- --------------------------------------------------------------------------------

      Except in tax-advantaged accounts, any sale or exchange of fund shares may
      be a taxable event.

      Annual Information - Information concerning the tax treatment of dividends
      and other distributions will be mailed to shareholders each year. Each
      fund will also provide annually to its shareholders information regarding
      the source of dividends and distributions of capital gains paid by that
      fund. Because everyone's tax situation is unique, 

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.

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

Taxes on Transactions. The chart at left also can provide a "rule of thumb"
guide for your potential U.S. federal tax liability when selling or exchanging
fund shares. The second row, "Short-term capital gains," applies to fund shares
sold within 12 months of purchase. The third row, "Long-term capital gains,"
applies to shares held for more than 12 months.

Starting January 1, 2001, sales of securities held for more than five years will
be taxed at special lower rates.

Any gains realized on a fund's transactions in options and financial futures
will be treated as taxable long- or short-term capital gains.


                                                               Your Investment 7
<PAGE>

      you should consult your tax adviser regarding the treatment of those
      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.

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 can set up most of these services when filling
      out your application or by calling 800-821-5129.

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

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

   Div-Move          You can 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 can 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.
                     Your shares must be in non-certificate form.              

   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
                     SWP request. 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    
                     "Contingent Deferred Sales Charges" under "Purchases."  

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

OTHER SERVICES

      Telephone Investing. After we have received the attached application
      (selecting "yes" under Section 7C and completing Section 7), you can
      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 of the money from your
      bank.

      Telephone Exchanges. You or your investment professional, with proper
      identification, can instruct your fund by telephone to exchange shares of
      any class for shares of the same class of any Eligible Fund 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. If you meet this
      requirement, 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.

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

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.

Exchanges by telephone should not be used to take advantage of short-term swings
in the market. The fund reserves the right to limit or terminate this privilege
for any shareholder making frequent exchanges or abusing the privilege and may
revoke the privilege for all shareholders upon 60 days' written notice.


8 Your Investment
<PAGE>

      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
      fund.

      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.

SALES CHARGES AND SERVICE FEES

      Sales and Service Compensation. As part of its plan for distributing
      shares, each 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: sales charges and 12b-1
      distribution fees that are paid out of each fund's assets. Service
      compensation originates from 12b-1 service fees. The 12b-1 fee rates vary
      by share class, according to the Rule 12b-1 plan adopted by each fund. The
      sales charges and 12b-1 fees paid by investors are shown in the
      class-by-class information under "Fees and Expenses" and "Purchases." The
      portion of these expenses that is paid as sales and service compensation
      to Authorized Institutions, such as your dealer, is shown in the chart at
      the end of this prospectus. The portion of such sales and service
      compensation paid to Lord Abbett Distributor is discussed under "Sales
      Activities" and "Service Activities." Sometimes we do not pay sales and
      service compensation where tracking data is not available for certain
      accounts or where the Authorized Institution waives part of the
      compensation.

      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 a 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 Rule 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.

MANAGEMENT

      The fund's investment adviser is Lord, Abbett & Co., 767 Fifth Avenue, New
      York, NY 10153-0203. Founded in 1929, Lord Abbett manages one of the
      nation's oldest mutual The fund's investment adviser is Lord, Abbett & Co.
      , 767 Fifth Avenue, New
      York, NY 10153-0203. Founded in 1929, Lord Abbett manages one of the
      nation's oldest mutual fund complexes, with more approximately $28 billion
      in more than 35 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.

      The fund pays Lord Abbett a monthly fee based on average daily net assets
      for each month. For the fiscal year ended December 31, 1998, the fee paid
      to Lord Abbett was at an annual rate of .00 of 1%. In addition, the fund
      pays all expenses not expressly assumed by Lord Abbett.

      Lord Abbett uses a team of portfolio managers and analysts acting together
      to manage the company's investment. Edward K. von der Linde, Portfolio
      Manger, heads the team, the senior members of which include. Howard
      Hansen, David Builder, and Eleen Banko.

12b-1 fees are payable regardless of expenses. The amounts payable by a fund
need not be directly related to expenses. If Lord Abbett Distributor's actual
expenses exceed the fee payable to it, a fund will not have to pay more than
that fee. If Lord Abbett Distributor's expenses are less than the fee it
receives, Lord Abbett Distributor will keep the full amount of the fee.


                                                               Your Investment 9
<PAGE>

                              For More Information

      OTHER INVESTMENT TECHNIQUES

      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. These strategies may involve buying or selling
      derivative instruments, such as options and futures contracts, stripped
      securities, currency exchange contracts, swap agreements, short sales of
      securities, indexed securities and rights and warrants. The fund may use
      these transactions to change the risk and return characteristics of each
      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. Also, these strategies could result in
      losses if the counterparty to a transaction does not perform as promised.

      Borrowing. Each fund may borrow from banks. If a fund borrows money, its
      share price may be subject to greater fluctuation until the borrowing is
      paid off. Each fund may borrow only for temporary or emergency purposes,
      and not in an amount exceeding 33 1/3% of its total assets.

      Foreign Securities. These securities are not subject to the same degree of
      regulation and may be more volatile and less liquid than securities traded
      in major U.S. markets. This affects block trading. Foreign portfolio
      securities may trade on days when an underlying fund does not value them.
      Fund share prices could be affected on days an investor cannot purchase or
      sell shares. Other risks include less information on public companies,
      banks and governments; political and social instability; expropriations;
      higher transaction costs; currency fluctuations; nondeductable withholding
      taxes and different accounting and settlement practices.

      Illiquid Securities. Securities not traded on the open market. Certain
      securities may be difficult or impossible to sell at the time and price
      the seller would like. The fund may invest up to 15% of its assets in
      illiquid securities. Securities determined by the Board to be liquid are
      not subject to this limitation, such as those purchased under Securities
      and Exchange Commission Rule 144A.

      Portfolio Securities Lending. The fund may lend securities to
      broker-dealers and financial institutions, as a means of earning income.
      This practice could result of a loss or delay in recovering a fund's
      securities, if the borrower defaults. The fund will limit its securities
      loans to 33 1/3% of its total assets.
     
      Repurchase Agreements.  In a repurchase agreement, a fund buys a security
at one price from a broker-dealer or financial institution and simultaneously
agrees to sell the same security back to the same party at a higher price in the
future.  If the other party to the agreement defaults or becomes insolvent, the
fund could lose money.

      Selling Covered Call Options.  A covered call option on stock give the
buyer of the option, upon payment of a premium to the seller(writer) of the
option, the right to call upon the writer to deliver a specified number of 
shares of a stockowned by the writer on or before a fixed date at a pre-
determined price.  The fun may write covered call options on securites having
an aggregate market value not to exceed 10% of the fund's gross assets.
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
      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

Guaranteed signature. An acceptable form of guarantee would be as follows:

o     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

          /s/ [ILLEGIBLE]
- --------------------------------------
                  AUTHORIZED SIGNATURE
( 960)                 x 9 6 0 3 4 7 0
SECURITIES TRANSFER AGENTS PROGRAM(sm)
                                    SR

o     In the case of the corporation -
      ABC Corporation

      Mary B. Doe
      By Mary B. Doe, President
      [Date]

         SIGNATURE GUARANTEED
         MEDALLION GUARANTEED
          NAME OF GUARANTOR

          /s/ [ILLEGIBLE]
- --------------------------------------
                  AUTHORIZED SIGNATURE
( 960)                 x 9 6 0 3 4 7 0
SECURITIES TRANSFER AGENTS PROGRAM(sm)
                                    SR


                                                         For More Information 11
<PAGE>

      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 certain tax-free, single-state series where the exchanging shareholder
      is a resident of a state in which such series is not offered for sale;
      Lord Abbett Equity Fund; Lord Abbett Series Fund; Lord Abbett U.S.
      Government Securities Money Market Fund ("GSMMF") (except for holdings in
      GSMMF which are attributable to any shares exchanged 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 account 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 mandatory distribution which bears the same relation to
      the entire mandatory distribution as the B share investment bears to the
      total investment.

      Legal Capacity. With respect to a redemption request, if (for example) the
      request is 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.

      Similarly, if (for example) the redemption request is on behalf of the ABC
      Corporation by a person (Mary B. Doe) that has the legal capacity to act
      on behalf of this corporation, because she is the President of the
      corporation, then 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.

      Mutual Fund Advisory Program. Certain unaffiliated 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 (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 brokers,
      dealers, registered investment advisers and other financial institutions.

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


Year 2000 Issues. Each fund could be adversely affected if the computers used by
each fund and their service providers do not properly process and calculate
date-related information from and after January 1, 2000.

While year 2000-related computer problems could have a negative effect on each
fund, Lord Abbett is working to avoid such problems and has assurances from each
fund's service providers that they are taking similar steps. However, because
the problem is unprecedented and efforts to identify and fix it are on-going, we
don't know whether these efforts will be successful. Accordingly, each fund may
be adversely affected.


12 For More Information
<PAGE>

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,
      1998 and the Independent Auditors' Report thereon appear in the Annual
      Report to Shareholders for the fiscal year ended December 31, 1998 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
                                       ------------------------------------------------------------------------
                                                                 Year Ended December 31,
Per Share Operating Performance:               1998        1997          1996           1995           1994
<S>                                          <C>         <C>           <C>            <C>            <C>    
Net asset value, beginning of year           $  0.00     $ 13.29       $ 12.18        $ 11.25        $ 12.65
- ---------------------------------------------------------------------------------------------------------------
Income from investment operations
- ---------------------------------------------------------------------------------------------------------------
  Net investment income                          .00         .08           .13           .162            .18
- ---------------------------------------------------------------------------------------------------------------
  Net realized and unrealized
- ---------------------------------------------------------------------------------------------------------------
    gain (loss) on investments                   .00        3.61          2.19          2.383          (.545)
- ---------------------------------------------------------------------------------------------------------------
Total from investment operations                 .00        3.69          2.32          2.545          (.365)
- ---------------------------------------------------------------------------------------------------------------
Distributions
- ---------------------------------------------------------------------------------------------------------------
  Dividends from net investment income           .00        (.23)         (.16)          (.17)          (.16)
- ---------------------------------------------------------------------------------------------------------------
  Distributions from net realized gain           .00       (3.38)        (1.05)        (1.445)         (.875)
- ---------------------------------------------------------------------------------------------------------------
Net asset value, end of year                 $  0.00     $ 13.37       $ 13.29        $ 12.18        $ 11.25
- ---------------------------------------------------------------------------------------------------------------
Total Return(a)                                 0.00%      31.53%        21.22%         26.09%          3.27%
- ---------------------------------------------------------------------------------------------------------------
Ratios to Average Net Assets:
- ---------------------------------------------------------------------------------------------------------------
  Expenses(d)                                   0.00%       1.25%         1.22%          1.27%          1.12%
- ---------------------------------------------------------------------------------------------------------------
  Net investment income                         0.00%       0.74%         1.12%          1.48%          1.53%
===============================================================================================================

<CAPTION>
                                               Class B Shares            Class C Shares
                                               --------------            --------------
                                                        Year Ended December 31,
                                        -----------------------------------------------------
Per Share Operating Performance:              1998       1997(b)        1998        1997(b)
<S>                                         <C>          <C>           <C>          <C>   
Net asset value, beginning of period        $ 0.00       $12.14        $  .00       $12.14
- ---------------------------------------------------------------------------------------------
Income from investment operations
- ---------------------------------------------------------------------------------------------
  Net investment income                        .00          (c)           .00          (c)
- ---------------------------------------------------------------------------------------------
  Net realized and unrealized
- ---------------------------------------------------------------------------------------------
    gain (loss on securities                   .00         3.27           .00         3.27
- ---------------------------------------------------------------------------------------------
Total from investment operations               .00         3.27           .00         3.27
- ---------------------------------------------------------------------------------------------
Distributions
- ---------------------------------------------------------------------------------------------
  Dividends from net investment income        (.00)        (.05)          .00         (.05)
- ---------------------------------------------------------------------------------------------
  Distribution from net realized gain         (.00)       (2.03)          .00        (2.03)
- ---------------------------------------------------------------------------------------------
Net asset value, end of year                $ 0.00       $13.33        $14.56       $13.33
- ---------------------------------------------------------------------------------------------
Total Return(a)                               0.00%       27.51%         0.00%       27.51%
- ---------------------------------------------------------------------------------------------
Ratios to average net assets:
- ---------------------------------------------------------------------------------------------
  Expenses(d)                                 0.00%        1.29%         0.00%        1.28%
- ---------------------------------------------------------------------------------------------
  Net investment income                       0.00%       (0.15)%        0.00%       (0.13)%
- ---------------------------------------------------------------------------------------------

<CAPTION>
=============================================================================================
                                                 Year Ended December 31,
                                        -----------------------------------------------------
Supplemental Data
  For All Classes:               1998       1997          1996         1995          1994
Net Assets, end of year (000)      $0     $343,236      $257,148     $227,149     $190,788
- ---------------------------------------------------------------------------------------------
Portfolio turnover rate          0.00%       56.96%        38.88%       41.42%       57.49%
- ---------------------------------------------------------------------------------------------
</TABLE>

(a)   Total return does not reflect the deduction of front-end or contingent
      deferred sales charges.

(b)   From commencement of operations for each class of shares: May 1, 1997
      (class B and C).

(c)   Amount to less than $0.01..

(d)   Not annualized.

      See Notes to Financial Statements.


                                                        Financial Information 13
<PAGE>

LINE GRAPH COMPARISON

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

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

                                 AWAITING DATA

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

                Average Annual Total Return At Maximum Applicable
              Sales Charge For The Periods Ending December 31, 1998

                                1 Year           5 Years      10 Years (or Life)
- --------------------------------------------------------------------------------
Class A(1)                       18.60%            17.20%           14.35%
- --------------------------------------------------------------------------------
Class B(3)                       19.79%               --            24.83%
- --------------------------------------------------------------------------------
Class C(4)                       24.88%               --            28.98%
- --------------------------------------------------------------------------------

(1)   This shows total return which is the percent change in value, after
      deduction of the maximum initial sales charge of 5.75% applicable to class
      A shares, with all dividends and distributions reinvested for the periods
      shown ending December 31, 1998 using the SEC-required uniform method to
      compute such return.

(2)   Performance for the unmanaged Russell Mid-Cap Index does not reflect
      transaction costs, management fees or sales charges.

(3)   The class B shares were first offered on 5/1/97. Performance reflects the
      deduction of a CDSC of 4% (for 1 year) and 3% (for life of the class).

(4)   The class C shares were first offered on 5/1/97. Performance is at net
      asset value.

14 Financial Information
<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>  
Less than $50,000                       5.75%                   5.00%                        0.25%                   5.24%
- ------------------------------------------------------------------------------------------------------------------------------------
$50,000 - $99,999                       4.75%                   4.00%                        0.25%                   4.24%
- ------------------------------------------------------------------------------------------------------------------------------------
$100,000 - $249,999                     3.75%                   3.25%                        0.25%                   3.49%
- ------------------------------------------------------------------------------------------------------------------------------------
$250,000 - $499,999                     2.75%                   2.25%                        0.25%                   2.49%
- ------------------------------------------------------------------------------------------------------------------------------------
$500,000 - $999,999                     2.00%                   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
- ------------------------------------------------------------------------------------------------------------------------------------
All amounts                     no front-end sales charge       none                         0.25%                   0.25%
- ------------------------------------------------------------------------------------------------------------------------------------
Class B investments                                                Percentage of average net assets(4)
- ------------------------------------------------------------------------------------------------------------------------------------
All amounts                     no front-end sales charge       none                         0.25%                   0.25%
- ------------------------------------------------------------------------------------------------------------------------------------
Class C investments
- ------------------------------------------------------------------------------------------------------------------------------------
All amounts                     no front-end sales charge       0.75%                        0.25%                   1.00%
- ------------------------------------------------------------------------------------------------------------------------------------
Class P investments
- ------------------------------------------------------------------------------------------------------------------------------------
All amounts                     no front-end sales charge       0.25%                        0.20%                   0.45%
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

(1)   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.

(4)   With respect to class B, C and P shares, 0.25%, 1.00% 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.

                                                        Financial Information 15
<PAGE>

                              For More Information

More information on this 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).

Mid-Cap Value Fund

The General Motors Building
767 Fifth Avenue
New York, NY 10153-0203
- ---------------------------
SEC file number: 811-3691

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
767 Fifth Avenue
New York, NY 10153-0203

                                                     
                   

 <PAGE>

- --------------------------------------------------------------------------------
LORD ABBETT
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
Statement of Additional Information                                  May 1, 1999

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

                                   Lord Abbett
- --------------------------------------------------------------------------------
                            Mid-Cap Value 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 The General Motors Building, 767 Fifth Avenue,
New York, New York 10153-0203. This Statement relates to, and should be read in
conjunction with, the Prospectus dated May 1, 1999.

Lord Abbett Mid-Cap Value Fund, Inc. (sometimes referred to as "we" or the
"Fund") was incorporated under Maryland law on March 14, 1983. The Fund's Board
of Directors has authority to create and classify shares of common stock into
separate series, without further action by shareholders. The Fund currently has
150,000,000 shares of authorized capital stock consisting of four classes (A, B,
C and P) at $0.001 par value. The Board of Directors will allocate these
authorized shares 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 Investment Company Act of 1940, as amended (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 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 the separate voting requirements
of the Rule.

Shareholder inquiries should be made by writing directly to the Fund or by
calling 800-821-5129. In addition, you can make inquiries through Lord Abbett
Distributor.

                      TABLE OF CONTENTS                                     Page

               1.     Investment Policies                                     2
               2.     Directors and Officers                                  3
               3.     Investment Advisory and Other Services                  5
               4.     Portfolio Transactions                                  6
               5.     Purchases, Redemptions and
                      Shareholder Services                                    7
               6.     Past Performance                                       15
               7.     Taxes                                                  16
               8.     Information About the Fund                             17
               9.     Financial Statements                                   17


                                       1

<PAGE>

                                       1.
                               Investment Policies


Fundamental Investment Restrictions

We are subject to the following investment restrictions which cannot be changed
without approval of a majority of our outstanding shares. The Fund may not: (1)
borrow money, except that (i) the Fund may borrow from banks (as defined in the
Investment Company Act of 1940, as amended (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) 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.

With respect to the restrictions mentioned herein, compliance therewith will not
be affected by changes in the market value of portfolio securities but will be
determined at the time of purchase or sale of such securities.

Non-Fundamental Investment Restrictions. In addition to the investment
restrictions above which cannot be changed without shareholder approval, we also
are subject to the following non-fundamental investment policies which may be
changed by the Board of Directors without shareholder approval. 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; or (10) buy from or sell to any of its
officers, 


                                       2
<PAGE>

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.

Under normal circumstances, at least 65% of the Fund's total assets will consist
of investments in mid-cap companies, determined at the time of purchase.
"Mid-cap" companies are defined for this purpose as companies whose outstanding
equity securities have an aggregate market value of between $500,000,000 and
$5,000,000,000.

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

Portfolio Turnover Rate. For the fiscal year ended December 31, 1997, our
portfolio turnover rate was 56.96% compared to 38.88% for the prior fiscal year.

                                       2.
                             Directors and Officers

The following trustee is a partner of Lord, Abbett & Co. ("Lord Abbett"), The
General Motors Building, 767 Fifth Avenue, New York, New York 10153-0203. He has
been associated with Lord Abbett for over five years and is also an officer
and/or director or trustee of the twelve other Lord Abbett-sponsored funds. He
is an "interested person" as defined in the Act, and as such, may be considered
to have an indirect financial interest in the Rule 12b-1 Plan described in the
Prospectus.

Robert S. Dow, age 53, Chairman and President

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

E. Thayer Bigelow
Time Warner Inc.
1271 Avenue of the Americas
New York, New York

Senior Adviser, Time Warner Inc. 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 57.

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

Co-founder and Chairman of the Board of the financial advisory firm of
Bush-O'Donnell & Company. Age 60.

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

Managing Director of Monitor Clipper Partners and President of The Clipper Group
L.P., both private equity investment funds. Age 56.

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


                                       3
<PAGE>

Partner in the law firm of Wildman, Harrold, Allen & Dixon. Age 68.

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

Retired. Former Chairman of Independent Election Corporation of America, a proxy
tabulating firm. Age 73.

C. Alan MacDonald
Directorship Inc.
8 Sound Shore Drive
Greenwich, Connecticut

Managing Director of Directorship Inc., a consultancy in board management and
corporate governance. Formerly, 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 18 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 65.

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

President and Chief Executive Officer of Rochester Button Company. Age 70.

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

Chairman of Spencer Stuart, an executive search consulting firm. Currently
serves as a Director of Ace, Ltd. (NYSE). Age 61.

The second column of the following table sets forth the compensation accrued for
the Fund's outside directors. The third and fourth columns set forth information
with respect to the equity-based benefits accrued for outside directors/trustees
maintained by the Lord Abbett-sponsored funds. The fourth column sets forth the
total compensation payable by such funds to the outside directors/trustees. No
director of the Fund associated with Lord Abbett and no officer of the Fund
received any compensation from the Fund for acting as a director or officer.

                   For the Fiscal Year Ended December 31, 1997

<TABLE>
<CAPTION>
       (1)                        (2)              (3)                  (4)

                                            Pension or           For Year Ended
                                            Retirement Benefits  December 31, 1997
                                            Accrued by the       Total Compensation
                              Aggregate     Fund and             Accrued by the Fund and
                              Compensation  Twelve Other Lord    Twelve Other Lord
                              Accrued by    Abbett-sponsored     Abbett-sponsored
Name of Director              the Fund(1)   Funds(2)             Funds(3)
- ----------------              ------------  -------------------  -----------------------
<S>                           <C>            <C>                 <C>     
E. Thayer Bigelow             $              $17,068             $ 56,000
</TABLE>


                                    4
<PAGE>

<TABLE>
<S>                           <C>            <C>                 <C>     
William H.T. Bush*
Robert B. Calhoun, Jr.**
Stewart S. Dixon              $              $32,190             $ 55,000
John C. Jansing               $              $45,0854            $ 55,000
C. Alan MacDonald             $              $30,703             $ 57,400
Hansel B. Millican, Jr.       $              $37,747             $ 55,000
Thomas J. Neff                $              $19,853             $ 56,000
</TABLE>

*Elected as of August 13, 1998 

**Elected as of June 17, 1998


1.    Outside directors' 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 is being deferred under a plan that deems the
      deferred amounts to be invested in shares of the Fund for later
      distribution to the directors/trustees.

2.    The amounts in Column 3 were accrued by the Lord Abbett-Sponsored Funds
      for the 12 months ended October 31, 1997 with respect to the equity based
      plans established for independent directors in 1996. This plan supercedes
      a previously approved retirement plan for all future directors. Current
      directors had the option to convert their accrued benefits under the
      retirement plan. All of the outside directors except one made such an
      election. Each plan also provides for a pre-retirement death benefit and
      actuarially reduced joint-and-survivor spousal benefits.

3.    This column shows aggregate compensation, including directors 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, 1998. The amounts of the aggregate compensation
      payable by the Fund as of December 31, 1998 deemed invested in Fund
      shares, including dividends reinvested and changes in net asset value
      applicable to such deemed investments, were: Mr. Bigelow, $   ; Mr. 
      Dixon, $        ; Mr. Jansing, $         ; Mr. MacDonald, $         ; 
      Mr. Millican, $         ; and Mr. Neff, $          . 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,     shares; Mr. Dixon,     shares; Mr. Jansing,     shares; Mr. 
      MacDonald,    shares; Mr. Millican,     shares; and Mr. Neff,     shares.

4.    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. Of the following, Messrs.
Carper, Hilstad, Morris, and Walsh are partners of Lord Abbett; the others are
employees:

Executive Vice President

Edward K. von der Linde, age 37

Vice Presidents

Paul A. Hilstad, age 56 (with Lord Abbett since 1995; formerly Senior Vice
President and General Counsel of American Capital Management & Research, Inc.)

Daniel E. Carper, age 46


                                       5
<PAGE>

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. from 1990 to 1995)

Thomas F. Konop, age 56

Robert G. Morris, age 53

A. Edward Oberhaus, age 38

Keith F. O'Connor, age 42

John J. Walsh, age 62

Howard Hansen, age 36

David J. Builder, age 43

Treasurer

Donna M. McManus, age 37 (with Lord Abbett since 1996, formerly a Senior Manager
at Deloitte & Touche LLP).

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 Investment Company Act of 1940, as amended (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.

As of        , 1999 our officers and trustees, as a group, owned less than 1% of
the Funds' outstanding shares. As of , 1999 there were no record holders of 5%
or more of the Funds' outstanding shares.

                                       3.
                     Investment Advisory and Other Services

As described under "Our Management" in the Prospectus, Lord Abbett is the Fund's
investment manager. Six of the general partners of Lord Abbett are officers
and/or directors of the Fund and are identified as follows: Robert S. Dow, Paul
A. Hilstad, Robert G. Morris, and John J. Walsh. The other general partners are:
Stephen I. Allen, Zane E. Brown, John E. Erard, Robert P. Fetch, Daria L.
Foster, Robert I. Gerber, W. Thomas Hudson, Stephen I. McGruder, Michael
McLaughlin, Robert J. Noelke, Mark R. Pennington, and Christopher Towle. The
address of each partner is The General Motors Building, 767 Fifth Avenue, New
York, New York 10153-0203.

The services performed by Lord Abbett are described in the Prospectus under "Our
Management". Under the Management Agreement, we 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 $200,000,000; .65 of 1% of
the portion in excess of $300,000,000 but not in excess of $500,000,000; and .50
of 1% of the portion in excess of $500,000,000. For the fiscal years ended
December 31, 1998, 1997 and 1996, the management fees paid to Lord Abbett
amounted to $           , $2,102,611, and $1,733,689 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 security transactions.


                                       6
<PAGE>

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. They perform audit services
for the Fund 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
Fund's custodian. In accordance with the requirements of Rule 17f-5 under the
Act, 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.

                                       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.

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 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 bases. 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.


                                       7
<PAGE>

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.

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.

We will not seek "reciprocal" dealer business (for the purpose of applying
commissions in whole or in part for our benefit or otherwise) from dealers as
consideration for the direction to them of portfolio business.

During the fiscal years ended December 31, 1998, 1997 and 1996, we paid total
commissions to independent broker-dealers of $         , $992,190, and $554,002,
respectively.

                                       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.

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.


                                       8
<PAGE>

The maximum offering price of Class A shares on December 31, 1998 was computed
as follows:

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

Maximum offering price per share (net asset
value divided by .9425)                                          $

The net asset value per share for the Class B, C and P shares will be determined
in the same manner as for the Class A shares (net assets divided by shares
outstanding). Our Class B, C and P shares will be offered at net asset value.

The Fund has entered into a distribution agreement with Lord Abbett Distributor
LLC, a New York limited liability company ("Lord Abbett Distributor") 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 Fund, 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.

For the last three fiscal years, Lord Abbett, as our principal underwriter,
received net commissions after allowance of a portion of the sales charge to
independent dealers as follows:

                                   Year Ended December 31,
                                   -----------------------
                             1998           1997          1996
                             ----           ----          ----

Gross sales charge                          $862,219      $337,563

Amount allowed
to dealers                                  $739,167      $291,495
                                            --------      --------
Net commissions
received by Lord Abbett                     $123,052      $46,068
                                            =========     =======

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 and C. The
different classes of shares represent investments in the same portfolio of
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 


                                       9
<PAGE>

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 .25 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 in "Buying Class A Shares" 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 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 


                                       10
<PAGE>

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 investment professional.

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 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.

Class A, B, C and P Rule 12b-1 Plans. 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 three Fund Classes: the "A Plan," the "B Plan" and the "C 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 such Class' shareholders. The expected
benefits include greater sales and lower redemptions of Class shares, which
should allow each Class to 


                                       11
<PAGE>

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 $         under the A Plan, $         under the B Plan ,$ 
under the C Plan and Class P Plan. Lord Abbett uses all amounts received under
each Plan as described in the Prospectus and for payments to dealers for (i)
providing continuous services to the 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, 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.

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:

Anniversary of the Day on                  Contingent Deferred Sales Charge
Which the Purchase Order Was Accepted      on Redemptions (As % of Amount 
                                           Subject to Charge)
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%


                                       12

<PAGE>

On the 5th, before the 6th ...................................  1.0%
On or after the 6th anniversary ..............................  None

In the table, an "anniversary" is the 365th day subsequent to the acceptance of
a purchase order or a prior anniversary. All purchases are considered to have
been made on the business day on which the purchase order was accepted.

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. Each 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."

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.

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.


                                       13
<PAGE>

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 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, and series of Lord Abbett
Research Fund not offered to the general public ("LARF").

Statement of Intention. Under the terms of the Statement of Intention to invest
$50,000 or more over a 13-month period as described in the Prospectus, in shares
of a Lord Abbett-sponsored fund (other than shares of LAEF, LASF, LARF, 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 Statement is not
completed. The Statement 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, LARF, 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, 


                                       14
<PAGE>

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. As stated in the Prospectus, 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 LARF, 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, and
(g) 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 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 30 day's 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 


                                       15
<PAGE>

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 except in the case of 401(k) plans and contain specific
information about the 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.

                                       6.
                                Past Performance

The Fund computes the average annual compounded rate of total return 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 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 average annual total return computation.

In calculating total returns for Class A shares, the current maximum sales
charge of 5.75% (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 method described above, the Fund's average annual
compounded rates of total return for the last one-, five-, and ten-year period
ending on December 31, 1998 were as follows:     %,     % and     % for the 
Fund's Class A shares, respectively. For the Fund's Class B shares, the average
annual compounded rate of total return for the life-of-the-Fund period ending on
December 31, 1998 was:    %. For the Fund's Class C shares, the average annual
compounded rate of total return for the life-of-the-Fund period ending on
December 31, 1998 was:    %.


                                       16
<PAGE>

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 by the Fund or otherwise sold may be more or
less than your tax basis in the shares at the time the redemption or sale is
made. Any gain or loss generally will be taxable for federal income tax
purposes. Any loss realized on the sale or redemption of Fund 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 stock or securities 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 stock or
securities that are substantially identical.

The Fund will be subject to a 4% nondeductible excise tax on certain amounts not
distributed (and not treated as having been distributed) on a timely basis in
accordance with a calendar-year distribution requirement. The Fund intends to
distribute to shareholders each year an amount adequate to avoid the imposition
of such excise tax.

As described in the Prospectus under "Risk Factors," the Fund may be subject to
foreign withholding taxes which would reduce the yield on its investments. Tax
treaties between certain countries and the United States may reduce or eliminate
such taxes. It is expected that Fund shareholders 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 the Fund.

Gains and losses 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 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 the Fund purchases shares in certain foreign investment entities, called
"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 with respect to
deferred taxes arising from such distributions or gains. If the Fund were to
invest in a passive foreign investment company with respect to which the Fund
elected to make a "qualified electing fund" election 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 qualified electing
fund, even if such amount were not distributed to the Fund.

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.

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
the 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 to non-United States
persons who own Fund shares.


                                       17
<PAGE>

                                       8.
                           Information About the Fund

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, 1998 and the
report of Deloitte & Touche LLP, independent auditors, on such financial
statements contained in the 1998 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.


                                       18
<PAGE>

PART C                         OTHER INFORMATION

This Post-Effective Amendment No. 19 (the "Amendment") to the Registrant's
Registration Statement relates only to Mid-Cap Value Fund's classes A, B, C and
P.

The other classes of shares of the Registrant are listed below and are offered
by the Prospectus and Statement of Additional Information in Parts A and B,
respectively, of the Post-Effective Amendments to the Registrant's Registration
Statement as identified. The following are separate classes of shares of the
Registrant. This Amendment does not relate to, amend or otherwise affect the
Prospectuses and Statements of Additional Information contained in the prior
Post-Effective Amendment listed below, and pursuant to Rule 485(d) under the
Securities Act of 1933, does not affect the effectiveness of such Post-Effective
Amendment.

                                 POST-EFFECTIVE
                                  AMENDMENT NO.

Class Y shares                           18

Item 23     Exhibits

            (a)   Articles of Incorporation are incorporated by reference to
                  Post-Effective Amendment No. to the Registration Statement on
                  Form N-1A filed on .

            (b)   By-Laws filed herewith.

            (c)   Instruments Defining Rights of Security Holders incorporated
                  by reference.

            (d)   Investment Advisory Contracts incorporated by reference.

            (e)   Underwriting Contracts incorporated by reference.

            (f)   Bonus or Profit Sharing Contracts is incorporated by reference
                  to Post Effective Amendment No. 6 to the Registration
                  Statement on Form N-1A filed on October 7, 1994.

            (g)   Custodian Agreements incorporated by reference.

            (h)   Other Material Contracts incorporated by reference.

            (i)   Legal Opinion incorporated by reference.

            (j)   Other Opinion.

            (k)   Omitted Financial Statements incorporated by reference.

            (l)   Initial Capital Agreements incorporated by reference.

            (m)   Rule 12b-1 Plan incorporated by reference to Post Effective
                  Amendment No. 12 filed on August 29, 1996.

            (n)   Financial Data Schedule. Incorporated by reference..

            (o)   Rule 18f-3 Plan. Incorporated by reference to Post Effective
                  Amendment No. filed on .

Item 24     Persons Controlled by or Under Common Control with the Fund

            None.
                 
Item 25     Indemnification
                 
            All Trustees, officers, employees and agents of Registrant are to be
            indemnified as set forth in Section 4.3 of Registrant's Declaration
            of Trust.
                 
            Insofar as indemnification for liability arising under the
            Securities Act of 1933 may be permitted to Trustees, officers and
            controlling persons of the Registrant pursuant to the foregoing
            provisions, or otherwise, the Registrant has been advised that in
            the opinion of the Securities and Exchange Commission such
            indemnification is against public policy as expressed in the Act and
            is, therefore, unenforceable. In the event that a claim for
            indemnification against such liabilities (other than the payment by
            the Registrant of expense incurred or paid by a Trustee, officer or
            controlling person of the Registrant in the successful defense of
            any action, suit or proceeding) is asserted by such Trustee, officer
            or controlling person in connection with the securities being
            registered, the Registrant will,


                                       2
<PAGE>

                  unless in the opinion of its counsel the matter has been
                  settled by controlling precedent, submit to a court of
                  appropriate jurisdiction the question of whether such
                  indemnification by it is against public policy as expressed in
                  the Act and will be governed by the final adjudication of such
                  issue.
             
                  In addition, Registrant maintains a Trustees' and officers'
                  errors and omissions liability insurance policy protecting
                  Trustees and officers against liability for breach of duty,
                  negligent act, error or omission committed in their capacity
                  as Trustees or officers. The policy contains certain
                  exclusions, among which is exclusion from coverage for active
                  or deliberate dishonest or fraudulent acts and exclusion for
                  fines or penalties imposed by law or other matters deemed
                  uninsurable.
               
Item 26           Business and Other Connections of Investment Adviser
            
               
                  Lord, Abbett & Co. acts as investment adviser for twelve other
                  investment companies (of which it is principal underwriter for
                  thirteen) and as investment adviser to approximately 8,300
                  private accounts as of September 30, 1998. Other than acting
                  as trustees, directors and/or officers of open-end investment
                  companies managed by Lord, Abbett & Co., none of Lord, Abbett
                  & Co.'s partners has, in the past two fiscal years, engaged in
                  any other business, profession, vocation or employment of a
                  substantial nature for his own account or in the capacity of
                  director, officer, employee, partner or Trustee of any entity.
               
Item 27           Principal Underwriters

            (a)   Lord Abbett Bond-Debenture Fund, Inc.
                  Lord Abbett Developing Growth Fund, Inc.           
                  Lord Abbett Tax-Free Income Fund, Inc.             
                  Lord Abbett Global Fund, Inc.                      
                  Lord Abbett Series Fund, Inc.                      
                  Lord Abbett U.S. Government Money Market Fund, Inc.
                  Lord Abbett Equity Fund                            
                  Lord Abbett Tax-Free Income Trust                  
                  Lord Abbett Affiliated Fund, Inc.                  
                  Lord Abbett Investment Trust                       
                  Lord Abbett Research Fund, Inc.                    
                  Lord Abbett Securities Trust                       
                  

                  Investment Advisor

                  American Skandia Trust (Lord Abbett Growth & Income Portfolio)

            (b)   The partners of Lord, Abbett & Co. are:

                  Name and Principal                 Positions and Offices
                  Business Address (1)               with Registrant
                  --------------------               ---------------

                  Robert S. Dow                      Chairman and President
                  Paul A. Hilstad                    Vice President & Secretary
                  Daniel E. Carper                   Vice President
                  Robert G. Morris                   Vice President
                  John J. Walsh                      Vice President

                  The other general partners of Lord Abbett & Co. who are
                  neither officers nor directors of the Registrant are Stephen
                  I. Allen, Zane E. Brown, John E. Erard, Robert P. Fetch, Daria
                  L. Foster, Robert I. Gerber, W. Thomas Hudson, Jr., Stephen I.
                  McGruder, Michael B. McLaughlin, Robert G. Morris, Robert J.
                  Noelke, R. Mark Pennington, and Christopher J. Towle.


                                       3
<PAGE>

                  Each of the above has a principal business address: 767 Fifth
                  Avenue, New York, NY 10153

            (c)   Not applicable

Item 28           Location of Accounts and Records

                  Registrant maintains the records, required by Rules 31a - 1(a)
                  and (b), and 31a - 2(a) at its main office.

                  Lord, Abbett & Co. maintains the records required by Rules 31a
                  - 1(f) and 31a - 2(e) at its main office.

                  Certain records such as cancelled stock certificates and
                  correspondence may be physically maintained at the main office
                  of the Registrant's Transfer Agent, Custodian, or Shareholder
                  Servicing Agent within the requirements of Rule 31a-3.

Item 29           Management Services

                  None

Item 30           Undertakings

                  The Registrant undertakes to furnish each person to whom a
                  prospectus is delivered with a copy of the Registrant's latest
                  annual report to shareholders, upon request and without
                  charge.

                  The registrant undertakes, if requested to do so by the
                  holders of at least 10% of the registrant's outstanding
                  shares, to call a meeting of shareholders for the purpose of
                  voting upon the question of removal of a director or directors
                  and to assist in communications with other shareholders as
                  required by Section 16(c) of the Investment Company Act of
                  1940, as amended.


                                       4
<PAGE>


                                   SIGNATURES

      Pursuant to the requirements of the Securities Act of 1933 and the
Investment Company Act of 1940, the Registrant had duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of New York, and State of New York on the 1st day of
March 1999.


                                             BY:      /s/ Thomas F. Konop
                                                      -------------------
                                                      Thomas F. Konop
                                                      Vice President

                                      LORD ABBETT MID-CAP VALUE FUND


<PAGE>

                                POWER OF ATTORNEY

      Each person whose signature appears below on this Amendment to the
Registration Statement hereby constitutes and appoints Paul A. Hilstad, Thomas
F. Konop, and Lawrence H. Kaplan , and each of them, with full power to act
without the other, his true and lawful attorney-in-fact and agent, with full
power of substitution and resubstitution, for him and in his name, place and
stead, in any and all capacities (until revoked in writing) to sign any and all
amendments to this Registration Statement (including post-effective amendments
and amendments thereto), and to file the same, with all exhibits thereto), and
to file the same, with all exhibits thereto, and other documents in connection
therewith, with the Securities and Exchange Commission, granting unto said
attorneys-in-fact and agents, and each of them, full power and authority to do
and perform each and every act and thing ratifying and confirming all that said
attorneys-in-fact and agents or any of them, or their or his substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.

      Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed below by the following persons in the
capacities and on the date indicated.

Signatures                          Title                   Date
- ----------                          -----                   ----

                                  Chairman, President
/s/ Robert S. Dow                 and Director/Trustee          3/1/99   
- --------------------------        --------------------      -----------------
Robert S. Dow


/s/ E. Thayer Bigelow             Director/Trustee              3/1/99      
- ---------------------------       ----------------          -----------------
E. Thayer Bigelow


/s/ William H. T. Bush            Director/Trustee             3/1/99      
- ---------------------------       ----------------          -----------------
William H. T. Bush


/s/ Robert B. Calhoun, Jr.        Director/Trustee              3/1/99      
- ---------------------------       ----------------          -----------------
Robert B. Calhoun, Jr.


/s/ Stewart S. Dixon              Director/Trustee             3/1/99      
- ---------------------------       ----------------          -----------------
Stewart S. Dixon


/s/ John C. Jansing               Director/Trustee              3/199      
- ---------------------------       ----------------          -----------------
John C. Jansing


/s/ C. Alan MacDonald             Director/Trustee              3/1/99      
- ---------------------------       ----------------          -----------------
C. Alan MacDonald


/s/ Hansel B. Millican, Jr.       Director/Trustee              3/1/99      
- ---------------------------       ----------------          -----------------
Hansel B. Millican, Jr.


/s/ Thomas J. Neff                Director/Trustee              3/1/99      
- ---------------------------       ----------------          -----------------
Thomas J. Neff

<PAGE>

                                     BY-LAWS

                                       OF

                      LORD ABBETT MID-CAP VALUE FUND, INC.

              (formerly Lord Abbett Value Appreciation Fund, Inc.)

                                    ARTICLE I

                                     OFFICES

      Section 1. Principal Office. The principal office of the Corporation in
Maryland shall be in the City of Baltimore, and the name of the resident agent
in charge thereof is The Prentice-Hall Corporation Systems, Maryland.

      Section 2. Other Offices. The Corporation may also have an office in the
City and State of New York and offices at such other places as the Board of
Directors may from time to time determine.

                                   ARTICLE II

                              STOCKHOLDERS MEETINGS

      Section 1. Annual Meetings. The Corporation shall not hold an annual
meeting of its stockholders in any fiscal year of the Corporation unless
required in accordance with the following sentence. The Chairman of the Board or
the President shall call an annual meeting of the stockholders when the election
of directors is required to be acted

<PAGE>
                                       2


on by stockholders under the Investment Company Act of 1940, as amended, and the
Chairman of the Board, the President, a Vice President, the Secretary or any
director shall call an annual meeting of stockholders at the request in writing
of a majority of the Board of Directors or of stockholders holding at least
one-quarter of the stock of the Corporation outstanding and entitled to vote at
the meeting. Any annual meeting of the stockholders held pursuant to the
foregoing sentence shall be held at such time and at such place, within the City
of New York or elsewhere, as may be fixed by the Chairman of the Board or the
President or the Board of Directors or by the stockholders holding at least
one-quarter of the stock of the Corporation outstanding and entitled to vote, as
the case may be, and as may be stated in the notice setting forth such call,
provided that any stockholders requesting such meeting shall have paid to the
Corporation the reasonably estimated cost of preparing and mailing the notice
thereof, which the Secretary shall determine and specify to such stockholders.
Any meeting of stockholders held in accordance with this Section 1 shall for all
purposes constitute the annual meeting of stockholders for the fiscal year of
the Corporation in which the meeting is held and, without limiting the
generality of the foregoing, shall be held for the purposes of (a) acting on any
such matter or matters so required to be acted on by stockholders under the
Investment Company Act of 1940, as amended, and (b) electing directors to hold
the offices of any directors who have held office for more than one year (or, in
the case of directors elected prior to July 1, 1987, who have held office for
more than three years) or

<PAGE>
                                       3


who have been elected by the Board of Directors to fill vacancies which result
from any cause, and for transacting such other business as may properly be
brought before the meeting. Only such business, in addition to that prescribed
by law, by the Articles of Incorporation and by these By-Laws, may be brought
before such meeting as may be specified by resolution of the Board of Directors
or by writing filed with the Secretary of the Corporation and signed by the
Chairman of the Board or by the President or by a majority of the directors or
by stockholders holding at least one-quarter of the stock of the Corporation
outstanding and entitled to vote at the meeting.

      Section 2. Special Meetings. Special meetings of the stockholders for any
purpose or purposes may be held upon call by the Chairman of the Board or by a
majority of the Board of Directors, and shall be called by the Chairman of the
Board, the President, a Vice President, the Secretary or any director at the
request in writing of a majority of the Board of Directors or of stockholders
holding at least one-quarter of the stock of the Corporation outstanding and
entitled to vote at the meeting, at such time and at such place where an annual
meeting of stockholders could be held, as may be fixed by the Chairman of the
Board, the President or the Board of Directors or by the stockholders holding at
least one-quarter of the stock of the Corporation outstanding and so entitled to
vote, as the case may be, and as may be stated in the notice setting forth such
call. Such request shall state the purpose or purposes of the proposed meeting,
and only such purpose or purposes so specified may properly be brought before
such meeting.

<PAGE>
                                       4


      Section 3. Notice of Meetings. Written or printed notice of every annual
or special meeting of stockholders, stating the time and place thereof and the
general nature of the business proposed to be transacted at any such meeting,
shall be delivered personally or mailed not less than 10 nor more than 90 days
previous thereto to each stockholder of record entitled to vote at the meeting
at his address as the same appears on the books of the Corporation. Meetings may
be held without notice if all of the stockholders entitled to vote are present
or represented at the meeting, or if notice is waived in writing, either before
or after the meeting, by those not present or represented at the meeting. No
notice of an adjourned meeting of the stockholders other than an announcement of
the time and place thereof at the preceding meeting shall be required.

      Section 4. Quorum. At every meeting of the stockholders the holders of
record of one-third of the outstanding shares of the stock of the Corporation
entitled to vote at the meeting, whether present in person or represented by
proxy, shall, except as otherwise provided by law, constitute a quorum. If at
any meeting there shall be no quorum, the holders of record of a majority of
such shares entitled to vote at the meeting so present or represented may
adjourn the meeting from time to time, without notice other than announcement at
the meeting, until a quorum shall have been obtained, at which time any business
may be transacted which might have been transacted at the meeting as originally
called.

<PAGE>
                                       5


      Section 5. Voting. Each stockholder entitled to vote at any meeting shall
have one vote in person or by proxy for each share of stock held by him, but no
proxy shall be voted after eleven months from its date, unless such proxy
provides for a longer period. All elections of directors shall be had, and all
questions, except as otherwise provided by law or by the Articles of
Incorporation or by these By-Laws, shall be decided, by a majority of the votes
cast by stockholders present or represented and entitled to vote thereat in
person or by proxy.

                                   ARTICLE III

                               BOARD OF DIRECTORS

      Section 1. General Powers. The property, affairs and business of the
Corporation shall be managed by the Board of Directors, provided, however, that
the Board of Directors may authorize the Corporation to enter into an agreement
or agreements with any person, corporation, association, partnership or other
organization, subject to the Board's supervision and control, for the purpose of
providing managerial, investment advisory and related services to the
Corporation which may include management or supervision of the investment
portfolio of the Corporation.

      Section 2. Number, Class, Quorum, Election, Term of Office and
Qualifications. The Board of Directors of the Corporation shall consist of not
less than three or more than fifteen persons, none of whom need be stockholders
of the 

<PAGE>
                                       6


Corporation. The number of directors (within the above limits) shall be
determined by the Board of Directors from time to time, as it sees fit, by vote
of a majority of the whole Board. Directors elected prior to July 1, 1987, shall
be divided into three classes, each to hold office for a term of three years;
directors elected thereafter shall consist of one class only. The directors
shall be elected at each annual meeting of stockholders and, whether or not
elected for a specific term, shall hold office, unless sooner removed, until
their respective successors are elected and qualify.

      One-third of the whole Board, but in no event less than two, shall
constitute a quorum for the transaction of business, but if at any meeting of
the Board there shall be less than a quorum present, a majority of the directors
present may adjourn the meeting from time to time until a quorum shall have been
obtained, when any business may be transacted which might have been transacted
at the meeting as originally convened. No notice of an adjourned meeting of the
directors other than an announcement of the time and place thereof at the
preceding meeting shall be required. The acts of the majority of the directors
present at any meeting at which there is a quorum shall be the acts of the
Board, except as otherwise provided by law, by the Articles of Incorporation or
by these By-Laws.

      Section 3. Vacancies. The Board of Directors, by vote of a majority of the
whole Board, may elect directors to fill vacancies in the Board resulting from
an increase in the number of directors or from any other cause. Directors so
chosen shall hold office 

<PAGE>
                                       7


until their respective successors are elected and qualify, unless sooner
displaced pursuant to law or these By-Laws.

      The stockholders, at any meeting called for the purpose, may, with or
without cause, remove any director by the affirmative vote of the holders of a
majority of the votes entitled to be cast, and at any meeting called for the
purpose may fill the vacancy in the Board thus caused.

      Section 4. Regular Meetings. Regular meetings of the Board of Directors
shall be held at such time and place, within or without the State of Maryland,
as may from time to time be fixed by Resolution of the Board or as may be
specified in the notice of any meeting. No notice of regular meetings of the
Board shall be required except as required by the Investment Company Act of
1940, as amended.

      Section 5. Special Meetings. Special meetings of the Board of Directors
may be called from time to time by the Chairman of the Board, the President, any
Vice President or any two directors. Each special meeting of the Board shall be
held at such place, either within or outside of the State of Maryland, as shall
be designated in the notice of such meeting. Notice of each such meeting shall
be mailed to each director, at his residence or usual place of business, at
least two days before the day of the meeting, or shall be directed to him at
such place by telegraph or cable, or be delivered to him personally not later
than the day before the day of the meeting. Every such notice shall state the
time 

<PAGE>
                                       8


and place of the meeting but need not state the purposes thereof, except as
otherwise expressly provided in these By-Laws or by statute.

      Section 6. Telephonic Conference Meetings. Any meeting of the Board or any
committee thereof may be held by conference telephone, regardless where each
director may be located at the time, by means of which all persons participating
in the meeting can hear each other, and participation in such meeting in such
manner shall constitute presence in person at such meeting except where the
Investment Company Act of 1940, as amended, specifically requires that the vote
of such director be cast in person.

      Section 7. Fees and Expenses. The directors shall receive such fees and
expenses for services to the Corporation as may be fixed by the Board of
Directors, subject however, to such limitations as may be provided in the
Articles of Incorporation. Nothing herein contained shall be construed to
preclude any director from serving the Corporation in any other capacity as an
officer, agent or otherwise and receiving compensation therefor.

      Section 8. Transactions with Directors. Except as otherwise provided by
law or in the Articles of Incorporation, a director of the Corporation shall not
in the absence of fraud be disqualified from office by dealing or contracting
with the Corporation either as a vendor, purchaser or otherwise, nor in the
absence of fraud shall any transaction or contract of the Corporation be void or
voidable or affected by reason of the fact that any director, or any firm of
which any 

<PAGE>
                                       9


director is a member, or any corporation of which any director is an officer,
director or stockholder, is in any way interested in such transaction or
contract; provided that at the meeting of the Board of Directors, at which said
contract or transaction is authorized or confirmed, the existence of an interest
of such director, firm or corporation is disclosed or made known and there shall
be present a quorum of the Board of Directors a majority of which, consisting of
directors not so interested, shall approve such contract or transaction. Nor
shall any director be liable to account to the Corporation for any profit
realized by him from or through any such transaction or contract of the
Corporation ratified or approved as aforesaid, by reason of the fact that he or
any firm of which he is a member, or any corporation of which he is an officer,
director, or stockholder, was interested in such transaction or contract.
Directors so interested may be counted when present at meetings of the Board of
Directors for the purpose of determining the existence of a quorum. Any
contract, transaction or act of the Corporation or of the Board of Directors
(whether or not approved or ratified as hereinabove provided) which shall be
ratified by a majority of the votes cast at any annual or special meeting at
which a quorum is present called for such purpose, or approved in writing by a
majority in interest of the stockholders having voting power without a meeting,
shall, except as otherwise provided by law, be valid and as binding as though
ratified by every stockholder of the Corporation.

      Section 9. Committees. The Board of Directors may, by resolution adopted
by a majority of the whole Board, designate one or more committees, each such
committee 

<PAGE>
                                       10


to consist of two or more directors of the Corporation, which, to the extent
permitted by law and provided in said resolution, shall have and may exercise
the powers of the Board over the business and affairs of the Corporation, and
may have power to authorize the seal of the Corporation to be affixed to all
papers which may require it. Such committee or committees shall have such name
or names as may be determined from time to time by resolution adopted by the
Board of Directors. A majority of the members of any such committee may
determine its action and fix the time and place of its meetings, unless the
Board of Directors, shall otherwise provide. The Board of Directors shall have
power at any time to change the membership of, to fill vacancies in, or to
dissolve any such committee.

      Section 10. Written Consents. Any action required or permitted to be taken
at any meeting of the Board of Directors or by any committee thereof may be
taken without a meeting, if a written consent thereto is signed by all members
of the Board or of such committee, as the case may be, and such written consent
is filed with the minutes or proceedings of the Board or committee.

      Section 11. Waiver of Notice. Whenever under the provisions of these
By-Laws, or of the Articles of Incorporation, or of any of the laws of the State
of Maryland, or other applicable statute, the Board of Directors is authorized
to hold any meeting or take any action after notice or after the lapse of any
prescribed period of time, a waiver thereof, in writing, signed by the person or
persons entitled to such notice or lapse of

<PAGE>
                                       11


time, whether signed before or after the time of meeting or action stated
herein, shall be deemed equivalent thereto. The presence at any meeting of a
person or persons entitled to notice thereof shall be deemed a waiver of such
notice as to such person or persons.

                                   ARTICLE IV

                                    OFFICERS

      Section 1. Number and Designation. The Board of Directors shall each year
appoint from among their members a Chairman and a President of the Corporation,
and shall appoint one or more Vice Presidents, a Secretary and a Treasurer and,
from time to time, any other officers and agents as it may deem proper. Any two
of the above- mentioned offices, except those of the President and a Vice
President, may be held by the same person, but no officer shall execute,
acknowledge or verify any instrument in more than one capacity if such
instrument be required by law or by these By-Laws to be executed, acknowledged
or verified by an two or more officers.

      Section 2. Term of Office. The term of office of all officers shall be one
year or until their respective successors are chosen; but any officer or agent
chosen or appointed by the Board of Directors may be removed, with or without
cause, at any time, by the affirmative vote of a majority of the members of the
Board the in office.

      Section 3. Duties. Subject to such limitations as the Board of Directors
may from time to time prescribe, the officers of the Corporation shall each have
such powers 

<PAGE>
                                       12


and duties as generally appertain to their respective offices, as well as such
powers and duties as from time to time may be conferred by the Board of
Directors.

                                    ARTICLE V

                              CERTIFICATE OF STOCK

      Section 1. Form and Issuance. Each stockholder of the Corporation shall be
entitled upon request, to a certificate or certificates, in such form as the
Board of Directors may from time to time prescribe, which shall represent and
certify the number of shares of stock of the Corporation owned by such
stockholder. The certificates for shares of stock of the Corporation shall bear
the signature, either manual or facsimile, of the Chairman of the Board, the
President or a Vice President and the Treasurer or an Assistant Treasurer or the
Secretary or an Assistant Secretary, and shall be sealed with the seal of the
Corporation or bear a facsimile of such seal. The validity of any stock
certificate shall not be affected if any officer whose signature appears thereon
ceases to be an officer of the Corporation before such certificate is issued.

      Section 2. Transfer of Stock. The shares of stock of the Corporation shall
be transferable on the books of the Corporation by the holder thereof in person
or by a duly authorized attorney, upon surrender for cancellation of a
certificate or certificates for a like number of shares, with a duly executed
assignment and power of transfer endorsed thereon or attached thereto, or, if no
certificate has been issued to the holder in respect of 

<PAGE>
                                       13


shares of stock of the Corporation, upon receipt of written instructions, signed
by such holder, to transfer such shares from the account maintained in the name
of such holder by the Corporation or its agent. Such proof of the authenticity
of the signatures as the Corporation or its agent may reasonably require shall
be provided.

      Section 3. Lost, Stolen, Destroyed and Mutilated Certificates. The holder
of any stock of the Corporation shall immediately notify the Corporation of any
loss, theft, destruction or mutilation of any certificate therefor, and the
Board of Directors may, in its discretion, cause to be issued to him a new
certificate or certificates of stock, upon the surrender of the mutilated
certificate or in case of loss, theft or destruction of the certificate upon
satisfactory proof of such loss, theft, or destruction; and the Board of
Directors may, in its discretion, require the owner of the lost, stolen or
destroyed certificate, or his legal representatives, to give to the Corporation
and to such registrar or transfer agent as may be authorized or required to
countersign such new certificate or certificates a bond, in such sum as they may
direct, and with such surety or sureties, as they may direct, as indemnity
against any claim that may be made against them or any of them on account of or
in connection with the alleged loss, theft, or destruction of any such
certificate.

      Section 4. Record Date. The Board of Directors may fix, in advance, a date
as the record date for the purpose of determining stockholders entitled to
notice of, or to vote at, any meeting of stockholders, or stockholders entitled
to receive payment of any 

<PAGE>
                                       14


dividend or the allotment of any rights, or in order to make a determination of
stockholders for any other proper purpose. Such date, in any case, shall be not
more than 90 days, and in case of a meeting of stockholders, not less than 10
days, prior to the date on which the particular action requiring such
determination of stockholders is to be taken. In lieu of fixing a record date,
the Board of Directors may provide that the stock transfer books shall be closed
for a stated period but not to exceed, in any case, 20 days prior to the date of
any meeting of stockholders or the date for payment of any dividend or the
allotment of rights. If the stock transfer books are closed for the purpose of
determining stockholders entitled to notice of or to vote at a meeting of
stockholders, such books shall be closed for at least 10 days immediately
preceding such meeting. If no record date is fixed and the stock transfer books
are not closed for determination of stockholders, the record date for the
determination of stockholders entitled to notice of, or to vote at, a meeting of
stockholders shall be at the close of business on the day on which notice of the
meeting is mailed or the day 30 days before the meeting, whichever is closer
date to the meeting, and the record date for the determination of stockholders
entitled to receive payment of a dividend or an allotment of any rights shall be
at the close of business on the day on which the resolution of the Board of
Directors declaring the dividend or allotment of rights is adopted, provided
that the payment or allotment date shall not be more than 90 days after the date
of the adoption of such resolution.

<PAGE>
                                       15


                                   ARTICLE VI

                                 CORPORATE BOOKS

      The books of the Corporation, except the original or a duplicate stock
ledger, may be kept outside the State of Maryland at such place or places as the
Board of Directors may from time to time determine. The original or duplicate
stock ledger shall be maintained at the office of the Corporation's transfer
agent.

                                   ARTICLE VII

                                   SIGNATURES

      Except as otherwise provided in these By-Laws or as the Board of Directors
may generally or in particular cases authorize the execution thereof in some
other manner, all deeds, leases, transfers, contracts, bonds, notes, checks,
drafts and other obligations made, accepted or endorsed by the Corporation and
all endorsements, assignments, transfers, stock powers or other instruments of
transfer of securities owned by or standing in the name of the Corporation shall
be signed or executed by two officers of the Corporation, who shall be the
Chairman, the President or a Vice President and a Vice President, the Secretary
or the Treasurer.

                                  ARTICLE VIII

                                   FISCAL YEAR

<PAGE>
                                       16


      The fiscal year of the Corporation shall be established by resolution of
the Board of Directors of the Corporation.

                                   ARTICLE IX

                                 CORPORATE SEAL

      The corporate seal of the Corporation shall consist of a flat faced
circular die with the word "Maryland" together with the name of the Corporation,
the year of its organization, and such other appropriate legend as the Board of
Directors may from time to time determine cut or engraved thereon. In lieu of
the corporate seal, when so authorized by the Board of Directors or a duly
empowered committee thereof, a facsimile thereof may be impressed or affixed or
reproduced.

                                    ARTICLE X

                                 INDEMNIFICATION

      As part of the consideration for agreeing to serve and serving as a
director of the Corporation, each director of the Corporation shall be
indemnified by the Corporation against every judgment, penalty, fine,
settlement, and reasonable expense (including attorneys' fees) actually incurred
by the director in connection with any threatened, pending or completed action,
suit or proceeding, whether civil, criminal, administrative or investigative, in
which the director was, is, or is threatened to be made a named defendant 

<PAGE>
                                       17


or respondent (or otherwise becomes a party) by reason of such directors service
in that capacity or status as such, and the amount of every such judgment,
penalty, fine, settlement and reasonable expense so incurred by the director
shall be paid by the Corporation or, if paid by the director, reimbursed to the
director by the Corporation, subject only to the conditions and limitations
imposed by the applicable provisions of Section 2-418 of the Corporations and
Associations Article of the Annotated Code of the State of Maryland and by the
provisions of Section 17(h) of the United States Investment Company Act of 1940
as interpreted and as required to be implemented by Securities and Exchange
Commission Release No. IC-11330 of September 4, 1980. The foregoing shall not
limit the authority of the Corporation to indemnify any of its officers,
employees or agents to the extent consistent with applicable law.

                                   ARTICLE XI

                                   AMENDMENTS

      All By-Laws of the Corporation shall be subject to alteration, amendment,
or repeal, and new By-Laws not inconsistent with any provision of the Articles
of Incorporation of the Corporation may be made, either by the affirmative vote
of the holders of record of a majority of the outstanding stock of the
Corporation entitled to vote in respect thereof, given at an annual meeting or
at any special meeting, provided notice of the proposed alteration, amendment,
or repeal of the proposed new By-Laws is 

<PAGE>
                                       18


included in or accompanies the notice of such meeting, or by the affirmative
vote of a majority of the whole Board of Directors given at a regular or special
meeting of the Board of Directors, provided that the notice of any such special
meeting indicates that the By-Laws are to be altered, amended, repealed, or that
new By-Laws are to be adopted.

                                   ARTICLE XII

                 COMPLIANCE WITH INVESTMENT COMPANY ACT OF 1940

      Investment Company Act of 1940. No provision of the By-Laws of the
Corporation shall be given effect to the extent inconsistent with the
requirements of the Investment Company Act of 1940, as amended.

<PAGE>

                         LORD ABBETT MID-CAP VALUE FUND

                                                              March 1, 1999

Securities and Exchange Commission
450 Fifth Street, N.W.
Washington, D.C. 20549

Re:     Lord Abbett Mid-Cap Value Fund (the "Fund")
        1933 Act File No. 2-82544
        1940 Act File No. 811-3691

Ladies/Gentlemen:

      Pursuant to paragraph (a)(1) of Rule 485 and the requirements of the
current EDGAR Filer Manual and Regulation S-T, enclosed for filing is
Post-Effective Amendment No. 17 to the Fund's Registration Statement on Form
N-1A.

      The purpose of filing the enclosed Amendment is to implement the new Form
N-1A and Plain English Requirements. In addition, the filing contains a general
update to the financial, performance and textual information contained in the
Amendment.

      I trust the above is sufficient for your purposes. Please call the
undersigned at (212) 848-1807 with any comments, questions or requests for
additional information.

                                               Very truly yours, 
                                             /s/ Thomas F. Konop

                                               Thomas F. Konop   
                                               Vice President    

Courtesy copies to:
         Patricia Williams



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