LORD ABBETT RESEARCH FUND INC
N-30D, 2000-07-31
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Lord Abbett    Growth Opportunities Fund                       Visit our
                                                           Web Site and get
                                                      up-to-date statistics and
                                                    other useful information at
                                              www.lordabbett.com





                   SEMI-ANNUAL REPORT FOR THE SIX MONTHS ENDED MAY 31, 2000




                                                                     [LOGO]




                                                        A portfolio of mid-sized
                                                        growth companies



                                     [LOGO]


<PAGE>

                             REPORT TO SHAREHOLDERS
                     For the Six Months Ended May 31, 2000


[PHOTO OF
ROBERT S. DOW]



/s/ Robert S. Dow
Robert S. Dow
Chairman

June 9, 2000


"We believe the stocks of mid-sized
companies are an important  part of
any well-diversified asset allocation
program."


            DALBAR
HONORS COMMITMENT TO INVESTORS
             1999

Lord,  Abbett  & Co.  is  proud  to
announce we have  received a DALBAR
award  for  providing  consistently
good service to  shareholders,  the
1999 Key  Honors  Award for  Mutual
Fund  Service.   DALBAR,  Inc.,  an
independent   research   firm   and
evaluator  of mutual fund  service,
presents  the  award  to  financial
services    firms   that    provide
consistently   solid   service   to
clients.


                Lord Abbett Growth  Opportunities  Fund completed the first half
                of its  fiscal  year on May 31,  2000 with a net asset  value of
                $19.75 per class A shares  versus  $18.89 on November  30, 1999.
                The Fund's total return over the same period was 5.65%.

                The period  through May 2000 can best be described as "a tale of
                two  markets."  Led by  computer  technology  and  biotechnology
                companies,   most  major   market   indices   exhibited   strong
                performance  from  December  1999 through March of this year and
                many momentum  investors  were rewarded with  significant  price
                gains.  However, in April and May the stock market experienced a
                sharp "correction" (or downturn) as investors'  euphoria for the
                stocks of technology  companies,  particularly  Internet  firms,
                fizzled.   Whereas  the   technology-rich   NASDAQ   Index*  had
                previously led the market,  it fell by 37 percent from its March
                peak to the end of May. During this volatile  period,  stocks of
                mid-sized  companies  (represented  by the Russell Midcap Growth
                Index*)  outperformed the stocks of larger firms (represented by
                the S&P 500*).

                Stocks of healthcare companies were the strongest performers for
                the Growth Opportunities Fund during the period. Many healthcare
                companies have recently  performed  well, due to strong revenues
                from  new  products.   We  anticipate  that  many  generic  drug
                manufacturers  are likely to continue to experience  accelerated
                revenue and earnings  growth,  as the product patents owned by a
                large  number  of  brand-name  pharmaceutical  companies  expire
                during  the  next  2-3  years,  making  room  for  generic  drug
                manufacturers  to produce even more new  products.  We have been
                overweighted  in  healthcare  companies  (compared to the Fund's
                benchmark,  the Russell  Midcap Growth  Index*)  during 2000 and
                continue  to do  extensive  research  in this  area to look  for
                strong companies with good growth prospects.

                Our exposure to the stocks of energy  companies also contributed
                positively to the Fund's  performance during the period. Oil and
                natural gas prices have been very strong,  particularly over the
                past few months.  This has provided a very positive  environment
                for both energy  companies  exploring  for new  reserves and the
                service companies that facilitate that exploration.

                Conversely, unlike 1999, when technology was our best performing
                sector,  our holdings in  technology  companies  did not perform
                well for the  Fund  during  the  first  part of  2000.  While we
                strongly  believe  in the  future  of  technology  and its  many
                exciting  applications,  especially  in  Internet  and  wireless
                communications  companies, we feel the valuations of many of the
                companies in the  technology  industry are very high compared to
                their underlying fundamentals. In addition, we believe that many
                of these companies are inappropriate for purchase in the Fund at
                the present  time,  since they do not satisfy our  criteria  for
                investing in  higher-quality  companies with established  market
                positions,  experienced management teams, strong earnings growth
                and healthy balance sheets.

                We  will  continue  to add to our  positions  in the  stocks  of
                fundamentally  strong,  fast-growing  mid-sized  firms.  We  are
                enthusiastic  about  the  prospects  for  mid-sized   companies,
                especially   given  that  they  are  more  liquid  than  smaller
                companies,  and  in  our  view  possess  faster  revenue  growth
                potential  versus many larger  companies.  We believe  mid-sized
                growth  companies  will  continue to rebound from spring  2000's
                stock market  correction  and we have  attempted to position the
                Fund to benefit  from such an upswing.  We believe the stocks of
                mid-sized    companies   are   an   important    part   of   any
                well-diversified  asset allocation program. In our opinion, this
                segment of the stock market gives  investors the  opportunity to
                invest in some of the most exciting trends and growing companies
                in  the  United  States.  As  always,  we  remain  committed  to
                constructing  the very best  portfolio  possible for our clients
                and appreciate the  opportunity to help you meet your investment
                goals.

*    The NASDAQ,  Russell  Midcap  Growth and S&P 500 Indices are commonly  used
     measures of stock market  performance,  are unmanaged and not available for
     direct investment.

<PAGE>

Strong Fund Performance

Comparison of the change in value of a $10,000  investment,  8/1/95-5/31/00,  in
Lord Abbett Growth  Opportunities Fund and the unmanaged S&P MidCap 400, Russell
2000 Index and Russell Midcap Growth Index.

-------------------------------------------------------------------------------
Graphics Omitted

$28,103                  $23,967        $16,945            $27,406

Growth                   S&P            Russell            Russell
Opportunities            MidCap         2000               Midcap Growth
Fund(1)                  400(2)         Index(3)           Index(4)

-------------------------------------------------------------------------------
(1) The  Fund  (Class  A  shares)  commenced  operations  8/1/95.  Reflects  the
reinvestment of all  distributions  at net asset value.
(2) S&P MidCap 400 Index is an unmanaged  weighted  index  comprising 400 widely
held common stocks  chosen by Standard & Poor's for their  mid-size and industry
characteristics.
(3) Russell 2000 Index measures the performance of the 2,000 smallest  companies
in the Russell 3000 Index, which represents approximately 8% of the total market
capitalization of the Russell 3000 Index. As of the latest  reconstitution,  the
average market  capitalization was approximately $580 million; the median market
capitalization was approximately $466 million.  The largest company in the index
had an  approximate  market  capitalization  of $1.5  billion.  Calculated  from
7/31/95.
(4) Russell Midcap Growth Index measures the performance of those Russell midcap
companies with higher  price-to-book ratios and higher forecasted growth values.
The stocks are also members of the Russell 1000 Growth  Index.  Calculated  from
7/31/95.


SEC-Required Information
Average  annual  compounded  returns for periods ended  6/30/00,  at the Class A
maximum sales charge of 5.75%, with all distributions reinvested:

-------------------------------------------------------------------------------
Grpahics Omitted

1 Year                        36.80%

3 Years                       24.05%

Life of Fund                  24.14%
(8/1/95 Inception)
-------------------------------------------------------------------------------

Past performance is no indication of future results.  The investment  return and
principal  value of an investment in the Fund will fluctuate so that shares,  on
any given day or when  redeemed,  may be worth more or less than their  original
cost.


                                                                               1


<PAGE>

LORD ABBETT GROWTH OPPORTUNITIES FUND

There are Four Phases of Business Growth

1.   Formative Phase...start-ups

2.   Developing Growth Phase...often experience dramatic growth

3.   Established Growth Phase...grow quickly and become more competitive forces

4.   Maturity  Phase...growth  patterns  begin to  resemble  the Gross  Domestic
     Product (GDP).

Growth  Opportunities  Fund focuses on companies  that are in the late stages of
Phase Two of the  business  growth  cycle and the early  stages of Phase  Three.
These are primarily mid-sized companies(1).
-------------------------------------------------------------------------------
Grpahics Omitted

<TABLE>
<CAPTION>
COMPANIES TOO SMALL                     GROWTH OPPORTUNITIES          COMPANIES TOO LARGE
AND/OR SPECULATIVE FOR THE FUND            FUND FOCUS(2)              AND/OR MATURE FOR THE FUND(3)

<S>                                     <C>                           <C>
                                        AmeriCredit Corp.             Wal-Mart Stores, Inc.
                                        Convergys Corp.               Oracle Corporation
                                        Plantronics                   Amgen


                                                                       (Sample companies not
                                                                   necessarily in portfolio)

|                   |                                  |                        |                   |
-----Formative------------------Developing------------------------Established-------Maturity--------
</TABLE>

(1) We define mid-sized companies as those with market  capitalizations  between
$1 billion and $10 billion.
(2) Sample of well-known  current holdings.  Investments in stocks of developing
companies  involve more risk and are generally more volatile than investments in
mature companies. As of 6/30/00,  allocations were as follows: AmeriCredit Corp.
2.6%,  Convergys Corp.  2.1%,  Plantronics  2.1%. The Fund is actively  managed,
holdings and allocations  are subject to change.  The actual growth of a company
cannot be guaranteed.
(3) Well-known companies that are not in the Fund.

  Opportunities with Mid-Sized Companies(4)

  Mid-sized  companies are expected to grow faster than large
  companies  over the  next 3-5  years.  In  addition,  their
  stocks may represent better value than large company stocks
  by two popular measures:

<TABLE>
<CAPTION>
                                                 Large Companies(7)          Mid-Sized Companies(8)
------------------------------------------------------------------------------------------------
<S>                                                    <C>                            <C>
  Estimated 3-5 Year Earnings Growth                   20.3%                          21.5%
------------------------------------------------------------------------------------------------
  P/E (Price/Earnings Ratio)(5)                        21.7%                          14.9%
------------------------------------------------------------------------------------------------
  P/B (Price/Book Value Ratio)(6)                       4.8x                           2.8x
</TABLE>

(4)  Source:  FactSet.  Representative data were calculated at Lord Abbett using
     the ValueLine Database on FactSet,  which may not include all securities in
     any portfolio or index. Data as of 6/30/00.
(5)  Price/Earnings  Ratio  (P/E) gives  investors  an idea of how much they are
     paying  for a  company's  earning  power.  The  higher  the  P/E,  the more
     investors are paying,  and  therefore,  the more  earnings  growth they are
     expecting.
(6)  Price/Book  Ratio  (P/B)  compares a stock's  market  value to the value of
     total assets less total liabilities  (book value).  The higher the P/B, the
     more investors are paying for the assets of the company.
(7)  Large companies are  represented by the Russell 1000 Index,  which measures
     the performance of the 1,000 largest  companies in the Russell 3000,  which
     represents 92% of the total market capitalization of the Russell 3000. Both
     indices are unmanaged and not available for direct investment.
(8)  Mid-sized  companies are  represented  by the Russell  Midcap Index,  which
     measures the performance of the 800 smallest  companies in the Russell 1000
     Index,   which   represents   approximately   26%  of  the   total   market
     capitalization  of the  Russell  1000.  The  index  is  unmanaged  and  not
     available for direct investment.

2

<PAGE>


 Uncovering Growing Companies

 Growth   Opportunities   Fund  is  managed  by  a  team  of
 experienced  investment  professionals  working to identify
 mid-sized  companies with apparent  competitive  advantages
 that will help them grow faster  than the overall  economy.
 Such companies generally have:

o  Established market positions        o  Proprietary products or services,
                                            often with:
o  Experienced management teams            -->  Unique technology
o  Reasonable debt levels                  -->  Patents, licenses or copyrights
o  Strong sales and earnings growth        -->  Exposure to new markets


 About Lord Abbett

 o  Established in 1929

 o  Exclusively focused on investmentmanagement

 o  Over $32 billion in assets under management*

Dedication, accountability,  involvement and performance define our organization
and characterize the way we invest. Lord, Abbett & Co. strives to stand apart by
providing  superior  products and exceptional  levels of service that investment
professionals and investors demand and deserve.

 *As of 5/31/00.



 Important Information

Common  stocks  purchased  by the  Fund  are  subject  to  market  fluctuations,
providing  the  potential  for gains and the risk of loss.  Starting  in October
1998,  Growth   Opportunities  Fund  changed  its  investment  strategy  to  one
emphasizing  growth-oriented  investments.  Performance  results  quoted  herein
reflect  past  performance,   current  sales  charges  (where   applicable)  and
appropriate  Rule  12b-1  Plan  expenses  from  commencement  of the Plan.  Past
performance  is no  indication  of  future  results.  Tax  consequences  are not
reflected.  The  investment  return and principal  value of an  investment  will
fluctuate so that shares,  on any given day or when redeemed,  may be worth more
or less than  their  original  cost.  The Fund  issues  additional  shares  with
distinct  pricing  options.  For a full disclosure of the differences in pricing
alternatives,  please call Lord Abbett  Distributor LLC at 800-874-3733  and ask
for the Fund's current prospectus. If used as sales material after 9/30/00, this
report must be accompanied by Lord Abbett's  Performance  Quarterly for the most
recently completed calendar quarter.


                                                                               3

<PAGE>

               Statement of Net Assets (unaudited)
               May 31, 2000

                   Investments                    Shares      Value
========================================================================
Investments in Common Stocks 95.66%
------------------------------------------------------------------------
Biotechnology .66%     *Immunex Corp.              60,800    $1,573,200
-----------------------------------------------------------=============
Building
Materials .76%         *Royal Group
                         Technologies Ltd.         85,000     1,822,187
-----------------------------------------------------------=============
Business               * Acxiom Corp.             130,000     3,802,500
Services 8.36%         * CSG Systems
                         International, Inc.       78,800     3,920,300
                       * CheckFree Holdings Corp.  99,100     4,143,619
                       * Sykes Enterprises, Inc.  160,000     3,090,000
                       * West Teleservices Corp.  195,000     5,130,937
                         Total                               20,087,356
-----------------------------------------------------------=============
Communications         * CommScope, Inc.          126,800     4,897,650
Equipment 7.07%          Harris Corp.             118,800     3,630,825
                         Mastec, Inc.              45,600     3,117,900
                       * Sawtek, Inc.              65,000     4,180,313
                       * UTStarcom, Inc.           30,000     1,147,500
                         Total                               16,974,188
-----------------------------------------------------------=============
Computer:              * Cambridge Technology
Services 3.50%           Partners, Inc.           258,800     2,086,575
                       * Diamond Technology
                         Partners, Inc.            50,100     3,156,300
                       * iGate Capital Corp.      123,300     1,934,269
                       *Safeguard Scientifics,
                         Inc.                      38,000     1,223,125
                         Total                                8,400,269
-----------------------------------------------------------=============
Computer:
Hardware 1.18%         * American Power Conversion
                         Corp.                     80,000     2,835,000
-----------------------------------------------------------=============
Computer:              * BEA Systems, Inc. ADR     44,000     1,589,500
Software 7.27%         * Lycos, Inc.               32,100     1,942,050
                         National Computer Systems,
                         Inc.                      65,200     2,962,525
                       * Network Solutions, Inc.    7,700     1,132,862
                       * RSASecurity, Inc.         30,700     1,767,169
                       *Satyam Infoway Ltd. ADR    21,000       435,750
                       * Symantec Corp.            59,100     3,885,825
                       * VIA NET.WORKS, Inc.      100,000     1,412,500
                       *Wind River Systems, Inc.   64,300     2,330,875
                         Total                               17,459,056
-----------------------------------------------------------=============
Drugs 11.36%             Alpharma Inc., Class A    87,700     4,341,150
                       * Alza Corp.                69,600     3,536,550
                       * Elan Corp. plc ADR        55,600     2,213,575
                       * Ivax Corp.                94,650     3,561,206
                         MedImmune, Inc.            8,000     1,243,000
                       * QLT, Inc.                 47,600     2,329,425
                       * Sepracor, Inc.            29,600     2,830,500
                         Teva Pharmaceutical
                         Industries Ltd. ADR       99,200     5,344,400
                       * Watson Pharmaceutical,
                          Inc.                     43,000     1,897,375
                         Total                               27,297,181
-----------------------------------------------------------=============
Electronics 1.48%      * SCI Systems, Inc.         79,100     3,559,500
-----------------------------------------------------------=============
Electronics:
Equipment/             * Sensormatic
Components 2.45%         Electronics Corp.        375,200     5,885,950
-----------------------------------------------------------=============
Electronics:             Dallas Semiconductor
                          Corp.                    45,000   $ 1,800,000
Semiconductors         * Integrated Device
7.39%                    Technology, Inc.         151,500     7,186,781
                       * Lattice Semiconductor
                          Corp.                    31,000     1,838,687
                       * Nvidia Corp.              34,700     3,960,138
                       * Silicon Storage
                         Technology, Inc.          40,000     2,970,000
                         Total                               17,755,606
-----------------------------------------------------------=============
Energy Equipment       * Grant Prideco, Inc.       75,100     1,746,075
& Services 6.15%       * Nabors Industries, Inc.  120,000     5,160,000
                         Transocean Sedco
                           Forex, Inc.             85,000     4,180,938
                       * Weatherford
                           International, Inc.     85,700     3,690,456
                         Total                               14,777,469
-----------------------------------------------------------=============
Financial              * AmeriCredit Corp.        322,300     5,942,406
Services 3.27%         * Catellus Development
                           Corp.                  142,000     1,908,125
                         Total                                7,850,531
-----------------------------------------------------------=============
Health Care            * Caremark Rx, Inc.        476,000     2,885,750
Services 3.54%         * Priority Healthcare
                           Corp.                  109,900     5,604,900
                         Total                                8,490,650
-----------------------------------------------------------=============
Hospital Supplies
1.00%                    Beckman Coulter, Inc.     40,000     2,405,000
-----------------------------------------------------------=============
Metals & Minerals
1.10%                  * Stillwater Mining Co.     94,400     2,649,100
-----------------------------------------------------------=============
Publishing .80%          Reader's Digest
                         Association,
                         Inc. Class A              56,400     1,910,550
-----------------------------------------------------------=============
Radio & TV             * Emmis Communications
                              Corp.                84,100     2,869,913
Broadcast 3.87%        * Pegasus Communications
                         Corp.                     83,200     3,411,200
                       * Spanish Broadcasting
                         System, Inc.             177,700     3,020,900
                         Total                                9,302,013
-----------------------------------------------------------=============
Restaurants .42%       * Starbucks Corp.           30,000     1,020,000
-----------------------------------------------------------=============
Retail 3.88%             RadioShack Corp.         104,900     4,451,694
                       * Whole Foods Market, Inc. 140,000     4,865,000
                         Total                                9,316,694
-----------------------------------------------------------=============
Retail:
Specialty 2.16%        * Michaels Stores, Inc.    121,400     5,197,438
-----------------------------------------------------------=============
Services 2.43%         * Convergys Corp.          130,000     5,841,875
-----------------------------------------------------------=============
Technology 3.39%       * Arrow Electronics, Inc.   32,000     1,122,000
                       * Proxicom, Inc. ADR        52,500     2,408,437
                       * Tech Data Corp.          122,800     4,612,675
                         Total                                8,143,112
-----------------------------------------------------------=============
Telecommunication      * Antec Corp.               80,500     4,045,125
Equipment 3.89%        * Plantronics, Inc.         62,000     5,293,250
                         Total                                9,338,375
-----------------------------------------------------------=============
Telecommunications     * Broadwing, Inc.          151,700     3,612,356
7.81%                  * Dobson Communications
                         Corp.                     25,000       595,313
                       * FLAG Telecom
                           Holdings Ltd.          107,800     1,529,413
                       *ICG Communications, Inc.  180,100     3,388,131
                       *NEXTLINK Communications,
                         Inc. Class A              26,500     1,856,656
                       *Net2Phone, Inc.            60,300     1,778,850
                       *Research In Motion Ltd.    21,300       685,594
                       *TeleCorp PCS, Inc.        103,000     3,128,625
                       *Viatel, Inc.               87,800     2,189,512
                         Total                               18,764,450
-----------------------------------------------------------=============

4

<PAGE>

                   Investments                    Shares      Value
========================================================================
Utilities .47%         *Independent Energy
                         Holdings plc ADR          50,000   $ 1,118,750

                         Total Investments in
                         Common Stocks
                         (Cost $222,487,301)                229,775,500
-----------------------------------------------------------=============
                                           Principal
Short-Term Investments 3.79%                  Amount
-----------------------------------------------------------=============
                    Associates Corp.
                    6.77% due 6/1/2000
                    (Cost $9,105,000)        $9,105,000       9,105,000
-----------------------------------------------------------=============
                    Total Investments 99.45%
                    (Cost $231,592,301)                     238,880,500
-----------------------------------------------------------=============
Other Assets, Less Liabilities .55%
========================================================================
Cash                                                            104,806
========================================================================
Receivables for:    Securities sold                          11,511,990
                    Capital stock sold                        2,037,543
                    Dividend and interest                        26,935
                    Total Other Assets                       13,681,274
===============================================================================
Payables for:       Securities purchased                   $ 11,918,214
                    Capital stocks reacquired                   189,382
                    Other                                       250,830
                    Total Liabilities                        12,358,426
-----------------------------------------------------------=====================
                    Total Other Assets,
                    Less Liabilities                          1,322,848
===============================================================================
Net Assets 100.00%                                         $240,203,348
===============================================================================

Class A  Shares-Net  asset  value  ($146,096,845/7,396,814
  shares  outstanding)                                           $19.75
Maximum offering price (net asset value plus sales charge
  of 5.75% of the offering  price)                               $20.96
Class B  Shares-Net  asset value  ($54,319,093/2,773,769
  shares outstanding)                                            $19.58
Class C Shares-Net asset value ($39,784,262/2,032,047
  shares  outstanding)                                           $19.58
Class Y Shares-Net  asset value  ($3,147.52/158.773
  shares outstanding)                                            $19.82
*Non-income producing security.
  ADRAmerican Depositary Receipt

See Notes to Financial Statements.



              Statement of Operations (unaudited)
Investment Income                                 Six Months Ended May 31, 2000
===============================================================================-
Income        Interest                                $294,591
              Dividends                                 79,101
                                                      --------
              Total income                                       $   373,692
--------------------------------------------------------------------------------
Expenses      Management fee                           781,646
              Management fee waived                   (257,312)
              12b-1 distribution plan-Class A          207,313
              12b-1 distribution plan-Class B          195,922
              12b-1 distribution plan-Class C          138,287
              Shareholder servicing                    197,611
              Reports to shareholders                   32,600
              Registration                              37,285
              Professional                              17,088
              Directors' fees                            1,128
              Other                                      2,344
--------------------------------------------------------------------------------
              Total expenses                                       1,353,912
--------------------------------------------------------------------------------
              Net investment loss                                   (980,220)
--------------------------------------------------------------------------------
Realized and Unrealized Loss on Investments
===============================================================================-
Net realized loss from investment transactions                   (11,322,382)
===============================================================================-
Net change in unrealized depreciation of investments              (3,527,246)
===============================================================================-
Net realized and unrealized loss on investments                  (14,849,628)
===============================================================================-
Net Decrease in Net Assets Resulting from Operations            $(15,829,848)
===============================================================================-
              See Notes to Financial Statements.


                                                                               5

<PAGE>

              Statements of Changes in Net Assets
<TABLE>
<CAPTION>
                                                                                                  Six Months Ended    Year Ended
                                                                                                           May 31, 2000November 30,
Increase (Decrease) in Net Assets                                                                      (unaudited)          1999
====================================================================================================================================
<S>                                                                                                 <C>              <C>
Operations    Net investment income (loss)                                                          $     (980,220)   $   17,047
              Net realized gain (loss) from investment transactions                                    (11,322,382)    1,508,482
              Net change in unrealized appreciation (depreciation) of investments                       (3,527,246)   10,365,297
              Net increase(decrease) in net assets resulting from operations                           (15,829,848)   11,890,826
------------------------------------------------------------------------------------------------------------------------------------
Dividends and distributions to shareholders from:
              Net investment income-Class A                                                                (31,428)            -
              Net investment income-Class B                                                                      -             -
              Net investment income-Class C                                                                      -             -
              Net investment income-Class Y                                                                     (6)            -
              Net realized gain from investment transactions-Class A                                      (462,980)            -
              Net realized gain from investment transactions-Class B                                      (127,732)            -
              Net realized gain from investment transactions-Class C                                       (98,035)            -
              Net realized gain from investment transactions-Class Y                                           (30)            -
              Total                                                                                       (720,211)            -
------------------------------------------------------------------------------------------------------------------------------------
Capital share transactions:
              Net proceeds from sales of shares                                                        219,554,073    47,393,509
              Net asset value of shares issued in reinvestment of dividends and distributions              705,953             -
              Total                                                                                    220,260,026    47,393,509
------------------------------------------------------------------------------------------------------------------------------------
              Cost of shares reacquired                                                                (23,154,107)   (4,359,957)
------------------------------------------------------------------------------------------------------------------------------------
              Increase in net assets derived from capital share transactions                           197,105,919    43,033,552
------------------------------------------------------------------------------------------------------------------------------------
Increase in net assets                                                                                 180,555,860    54,924,378
------------------------------------------------------------------------------------------------------------------------------------
Net Assets:
              Beginning of period                                                                       59,647,488     4,723,110
              ----------------------------------------------------------------------------------------------------------------------
              End of period*                                                                          $240,203,348  $ 59,647,488
              ======================================================================================================================
</TABLE>
            * Including undistributed (overdistributed) net investment income of
              $(994,370) and $17,284, respectively.
              See Notes to Financial Statements.




      Financial Highlights

<TABLE>
<CAPTION>
                                                                                                                 Class A Shares
                                        -------------------------------------------------------------------------------------------
                                         Six Months                                                               August 1, 1995
                                              Ended                                                               Commencement
                                           May 31,                                                 Year Ended     of Operations) to
                                               2000                                               November 30,    November 30,
Per Share Operating Performance:        (unaudited)            1999          1998         1997         1996         1995
===================================================================================================================================
<S>                                       <C>             <C>           <C>          <C>          <C>          <C>
Net asset value, beginning of period      $   18.89       $   12.58     $   16.18    $   12.84    $   10.18    $   10.00
-----------------------------------------------------------------------------------------------------------------------------------
      Income from investment operations
      Net investment income (loss)            (0.09)(e)         .04(e)        .15          .23          .30          .10
      Net realized and unrealized
        gain on investments                    1.15            6.27           .09         3.39         2.50          .08
      Total from investment operations         1.06            6.31           .24         3.62         2.80          .18
-----------------------------------------------------------------------------------------------------------------------------------
      Distributions from:
      Net investment income                    (.01)              -          (.37)        (.28)        (.12)           -
      Net realized gain on investments         (.19)              -         (3.47)           -         (.02)           -
      Total distributions                      (.20)              -         (3.84)        (.28)        (.14)           -
-----------------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period            $   19.75       $   18.89     $   12.58    $   16.18    $   12.84    $   10.18
-----------------------------------------------------------------------------------------------------------------------------------
Total Return(b)                                5.65%(d)       50.04%         5.71%       28.90%       27.81%        1.80%(d)
===================================================================================================================================
      Ratios to Average Net Assets:
      Expenses, including waiver
        and reimbursements                      .66%(d)         .41%          .02%         .00%         .00%         .00%(d)
      Expenses, excluding waiver
        and reimbursements                      .80%(d)        1.64%         1.60%        1.58%        2.39%        1.20%(d)
      Net investment income (loss)             (.44)%(d)        .25%         1.14%        1.69%        2.67%        1.04%(d)
====================================================================================================================================
</TABLE>

6

<PAGE>

      Financial Highlights (continued)


<TABLE>
<CAPTION>
                                                Class B Shares                     Class C Shares          Class Y Shares
-----------------------------------------------------------------   ----------------------------------  ----------------------------
                               Six Months                Oct. 16,    Six Months               Oct. 19,   Six Months        Dec. 9,
                                    Ended              1998(c) to        Ended              1998(c) to         Ended    1998(c) to
Per Share                     May 31, 2000                Nov. 30,  May 31, 2000              Nov. 30,    May 31, 2000    Nov. 30,
Operating Performance:        (unaudited)       1999         1998     (unaudited)    1999        1998    (unaudited)         1999
====================================================================================================================================
<S>                                <C>          <C>         <C>        <C>           <C>        <C>         <C>         <C>
Net asset value,
     beginning of period           $18.78       $12.57      $10.41     $18.76        $12.59     $10.70      $18.94      $12.76
------------------------------------------------------------------------------------------------------------------------------------
   Income from investment
     operations
   Net investment income  (loss)     (.16)(e)     (.06)(e)    __(a)      (.16)(e)      (.06)(e)     __(a)     (.07)(e)     .09(e)
   Net realized and unrealized
       gain on investment            1.15         6.27        2.16       1.17          6.23       1.89        1.18        6.09

   Total from investment
     operations                       .99         6.21        2.16       1.01          6.17       1.89        1.11        6.18
------------------------------------------------------------------------------------------------------------------------------------
   Distributions from:
   Net investment income                --          --          --         --         --         --           (.04)          --
   Net realized gain on
     investments                     (.19)          --         --        (.19)        --         --           (.19)          --
   Total distributions               (.19)          --         --        (.19)        --         --           (.23)          --
-----------------------------------------------------------------------------------------------------------------------------------
Net asset value,
     end of period                 $19.58       $18.78      $12.57     $19.58        $18.76     $12.59       $19.82      $18.94
------------------------------------------------------------------------------------------------------------------------------------
Total Return (b)                     5.35%(d)    49.32%      20.75%(d)   5.40%(d)     49.01%     17.66%(d)     5.88%(d)   48.43%(d)
====================================================================================================================================
   Ratios to Average
     Net Assets:
   Expenses, including waiver
       and reimbursements             .98%(d)     1.07%        .13%(d)    .97%(d)      1.07%       .13%(d)      .48%(d)     .06%(d)
   Expenses, excluding waiver
       and reimbursements            1.12%(d)     2.30%        .34%(d)   1.11%(d)      2.30%       .34%(d)      .62%(d)    1.27%(d)
   Net investment income (loss)      (.77)%(d)    (.40)%      (.08)%(d)  (.76)%(d)     (.40)%     (.10)%(d)    (.31)%(d)    .62%(d)
   =================================================================================================================================

                                        Six Months                                                                    August 1, 1995
                                             Ended                                                                     (Commencement
                                          May 31,                                                    Year Ended    of Operations) to
                                              2000                                                  November 30,        November 30,
Supplemental Data For All Classes:     (unaudited)        1999             1998         1997            1996                   1995
====================================================================================================================================
   Net assets, end of period (000)     $240,203         $59,647           $4,723       $1,672          $1,462               $968
   Portfolio turnover rate                66.60%         104.87%          136.81%       52.86%          30.78%              1.55%
   =================================================================================================================================
</TABLE>

 (a) Amount less than $.01.
 (b) Total  return does not  consider  the effects of sales loads and assumes
     the  reinvestment of all  distributions.  (c)Commencement  of operations of
     respective class shares.
 (d) Not annualized.
 (e) Calculated using average shares outstanding during the period.
     See Notes to Financial Statements.

                                                                               7

<PAGE>


Notes to Financial Statements (unaudited)


1. SIGNIFICANT ACCOUNTING POLICIES
Lord Abbett  Research  Fund,  Inc.  (the  "Company")  is an open-end  management
investment  company  incorporated  under  Maryland  law on April 26,  1992.  The
Company  consists of three  separate  portfolios.  This report covers one of the
portfolios-Lord  Abbett  Growth  Opportunities  Fund  ("Series").  The Series is
diversified as defined under the  Investment  Company Act of 1940. The financial
statements  have  been  prepared  in  conform  ity  with  accounting  principles
generally accepted in the United States of America,  which require management to
make certain estimates and assumptions at the date of the financial  statements.
The following summarizes the significant accounting policies of the Series.

(a) Security valuation is determined as follows:  Portfolio securities listed or
admitted to trad ing privileges on any national  securities  exchange are valued
at the last  sales  price on the  principal  securities  exchange  on which such
securities are traded, or, if there is no sale, at the mean between the last bid
and ask prices on such exchange.  Securities traded only in the over-the-counter
market are valued at the mean  between the last bid and ask prices,  except that
securities  admitted to trading on the NASDAQ  National Market System are valued
at the last sales  price if it is  determined  that such  price more  accurately
reflects the value of such securi  ties.  Short-term  securities  maturing in 60
days or less are valued at  amortized  cost  which  approximates  market  value.
Securities  for which market  quotations  are not  available  are valued at fair
value under procedures approved by the Board of Directors.

(b) It is the  policy of the  Series to meet the  requirements  of the  Internal
Revenue Code applicable to regulated  investment companies and to distribute all
of its taxable income. Therefore, no federal income tax provision is required.

(c)  Investment  transactions  are accounted for on the date that the securities
are purchased or sold (trade date).  Realized  gains and losses from  investment
transactions  are calculated on the identified  cost basis.  Dividend income and
distributions  to  shareholders  are  recorded  on  the  ex-dividend  date.  Net
investment  income (other than  distribution  and service fees) and realized and
unrealized  gains or losses are allocated to each class of shares based upon the
relative proportion of net assets at the beginning of the day.

2. MANAGEMENT FEE AND OTHER TRANSACTIONS WITH AFFILIATES
The Series has a management  agreement with Lord,  Abbett & Co. ("Lord  Abbett")
pursuant to which Lord Abbett  supplies  the Series with  investment  management
services, and executive and other personnel,  pays the remuneration of officers,
provides  office space and pays for ordinary and  necessary  office and clerical
expenses  relating to  research,  statistical  work and the  supervision  of the
Series' investment portfolio.  The management fee paid is based on average daily
net assets for each month at the annual rate of 0.90 of 1%. Lord Abbett waived a
portion of its  management  fee during the period ended May 31, 2000. At May 31,
2000, the management fee payable was $184,283.

The Series has rule 12b-1 plans and agreements  (the "Class A, Class B and Class
C Plans") with Lord Abbett Distributor LLC ("Distributor"), an affiliate of Lord
Abbett.  The Series makes payments to Distributor,  which uses or passes on such
payments to authorized  institutions.  Pursuant to the Class A Plan,  the Series
pays  Distributor:  (1) an annual  service fee of 0.25% of the average daily net
asset value of Class A shares,  (2) a one-time  distribution  fee of up to 1% on
certain qualifying purchases, and (3) an annual distribution fee of 0.10% of the
average  daily net asset  value of Class A shares.  Pursuant  to the Class B and
Class C Plans,  the Series pays  Distributor an annual service and  distribution
fee of 0.25% and 0.75%,  respectively,  of the average  daily net asset value of
the  shares  outstanding.  Class Y does not have a Rule 12b-1  plan.  At May 31,
2000, the 12b-1 fee payable was $113,409.

Distributor  received $358,014,  representing payment of commissions on sales of
Class A shares,  after  deducting  $2,040,869  allowed to authorized  dealers as
concessions.  Certain of the Series'  officers and directors have an interest in
Lord Abbett.

3. CAPITAL
The Company has  authorized  150 million shares of $.001 par value capital stock
desig nated as follows:  Class A-50  million,  Class B -30  million,  Class C-20
million,  Class P -20 million,  Class Y-30 million.  Paid in capital amounted to
$244,370,778 at May 31, 2000.

Transactions in capital stock were as follows:

                Six Months Ended May 31, 2000     Year Ended Nov. 30, 1999
                ----------------------------------------------------------------
Class A               Shares         Amount          Shares        Amount
--------------------------------------------------------------------------------
Sales of shares      5,883,802   $128,016,674       2,010,484   $31,122,767
Shares issued to
shareholders in
reinvestment of
dividends and
distributions           24,829        488,885              --            --
Total                5,908,631    128,505,559       2,010,484    31,122,767
--------------------------------------------------------------------------------
Shares reacquired     (642,643)   (13,645,038)       (212,825)   (3,631,283)
Increase             5,265,988   $114,860,521       1,797,659$   27,491,484

                Six Months Ended May 31, 2000       Year Ended Nov. 30, 1999
                ----------------------------------------------------------------
Class B               Shares         Amount             Shares        Amount
--------------------------------------------------------------------------------
Sales of shares     2,470,095    $54,011,012            583,643     $9,180,995
Shares issued to
shareholders in
reinvestment of
dividends and
distributions           6,306        123,464                  -             -
Total               2,476,401     54,134,476            583,643      9,180,995
--------------------------------------------------------------------------------
Shares reacquired    (286,038)    (6,145,035)           (18,432)      (294,430)
Increase            2,190,363    $47,989,441            565,211$     8,886,565
--------------------------------------------------------------------------------

                Six Months Ended May 31, 2000         Year Ended Nov. 30, 1999
                ----------------------------------------------------------------
Class C             Shares         Amount                Shares        Amount
--------------------------------------------------------------------------------
Sales of shares     1,739,313    $37,526,387            450,156     $7,087,621
Shares issued to
shareholders in
reinvestment of
dividends and
distributions           4,783         93,568                  -             -
Total               1,744,096     37,619,955            450,156     7,087,621
--------------------------------------------------------------------------------
Shares reacquired    (161,764)    (3,364,034)           (24,444)     (434,244)
Increase            1,582,332    $34,255,921            425,712    $6,653,377
--------------------------------------------------------------------------------

                Six Months Ended May 31, 2000           Year Ended Nov. 30, 1999
                ----------------------------------------------------------------
Class Y            Shares         Amount             Shares        Amount
--------------------------------------------------------------------------------
Sales of shares         -            $ -                157     $   2,126
Shares issued to
shareholders in
reinvestment of
dividends and
distributions           1.802         36                  -             -
Total                   1.802         36                157         2,126
--------------------------------------------------------------------------------
Shares reacquired       -              -                  -             -
Increase                1.802        $36                157     $   2,126
--------------------------------------------------------------------------------
NOTE: There was no capital stock activity for Class P shares during the period.

4. Distributions
Distributions  from net investment  income and net realized gain from investment
transactions, if any, are distributed to shareholders annually. At May 31, 2000,
accumulated net realized loss for the Series was $10,461,259.

Income and capital gain  distributions  are determined in accordance with income
tax   regulations   which  may  differ  from  methods  used  to  determine   the
corresponding  income and capital gains amounts in  accordance  with  accounting
principles generally accepted in the United States of America.

5. PURCHASES AND SALES OF SECURITIES
Purchases and sales of investment securities (other than short-term investments)
for the period  ended May 31, 2000  aggregated  $298,232,991  and  $110,315,054,
respectively. As of May 31, 2000, net unrealized appreciation for federal income
tax purposes  aggregated  $7,288,199 of which $30,806,095 related to appreciated
securities  and  $23,517,896  related  to  depreciated  securities.  The cost of
investments  for federal income tax purposes is  substantially  the same as that
used for financial reporting purposes.

6. DIRECTORS' REMUNERATION
The Directors of the Company associated with Lord Abbett and all officers of the
Company  receive no  compensation  from the Company for acting as such.  Outside
directors'  fees and retirement  costs are allocated among all funds in the Lord
Abbett group based on the net assets of each fund.

7. LINE OF CREDIT
The  Company,  along  with  certain  other  funds  managed by Lord  Abbett,  has
available a $200,000,000 unsecured revolving credit facility ("Facility"),  from
a consortium  of banks,  to be used for  temporary  or emergency  purposes as an
additional  source of  liquidity to fund  redemptions  of investor  shares.  Any
borrowings  under this Facility  will bear  interest at current  market rates as
defined in the  agreement.  The fee for this  Facility  was at an annual rate of
0.06% during the year ended November 30, 1999. Effective December 17, 1999, this
fee was increased to 0.09% per annum.  There were no loans outstanding  pursuant
to this  Facility at May 31,  2000,  nor was the  Facility  utilized at any time
during the period.


Copyright (C) 2000 by Lord Abbett Growth  Opportunities  Inc., 90 Hudson Street,
Jersey  City,  NJ  07302-3973

This publication,  when not used for the general  information of shareholders of
Lord  Abbett  Growth  Opportunities,  is to be  distributed  only if preceded or
accompanied by a current  prospectus which includes  information  concerning the
Series'  Investment  objective  and policies,  sales charges and other  matters.
There is no guarantee that the forecasts contained in this publication will come
to pass. All rights reserved. Printed in the U.S.A.

8

<PAGE>

Lord, Abbett & Co.


INVESTMENT
TEAM LEADER
     PROFILE



[Photo of Stephen J. McGruder]



          Stephen J. McGruder
          Partner and Investment Team Leader

                    Stephen J. McGruder,  a CFA  charterholder,  has 30 years of
                    experience in the investment industry. Prior to joining Lord
                    Abbett in 1995, he was Vice President and Portfolio  Manager
                    at  Wafra  Investment  Advisory  Group.  He  holds a BS from
                    Stanford  University  and a BA in  Business  Economics  from
                    Claremont McKenna College.



ABOUT YOUR FUND'S
        BOARD OF
        DIRECTORS

The Securities and Exchange Commission (SEC) views the role of the independent
Board of  Directors  as one of the most  important  components in  overseeing a
mutual fund. The Board of Directors watches over your Fund's general operations
and represents your  interests.  Board members review and approve every contract
between  your Fund and Lord,  Abbett & Co. (the Fund's  investment  manager) and
Lord Abbett  Distributor  LLC (the Fund's  underwriter).  They meet regularly to
review a wide  variety of  information  and issues  regarding your Fund.  Every
member  of the  Board  possesses  extensive  business  experience.  Lord  Abbett
Tax-Free  Income  Fund's  shareholders  are indeed  fortunate to have a group of
independent   directors  with  diverse  backgrounds  to  provide  a  variety  of
viewpoints  in the  oversight  of  their  Fund.  Below,  we  feature  one of our
independent directors, E. Thayer Bigelow, Jr.

[PHOTO]

E. Thayer Bigelow, Jr.
Director -Lord Abbett
Tax-Free Income Fund


Mr.  Bigelow  is a  graduate  of  Trinity  College  and  earned  his  MBA at the
University of Virginia's  Darden Business School. He is currently Senior Advisor
at Time Warner Inc.  Prior to that,  he was acting CEO of  Courtroom  Television
Network,  and  previously  served  for five years as  President  and CEO of Time
Warner Cable Programming, Inc.

Mr. Bigelow serves as a member of the Board of Trustees for the Cate School.  He
is also a  member  of the  Board  of  Directors  of  Crane  Co.  He has  been an
independent director for all of Lord Abbett's Family of Funds since 1994.

<PAGE>
                           INVESTING IN THE
                        LORD ABBETT
                                 FAMILY OF FUNDS
<TABLE>
<CAPTION>
---------------------------------------------------------------------------------------------------------------------------
 GROWTH
---------------------------------------------------------------------------------------------------------------------------
                                                                                                   INCOME
---------------------------------------------------------------------------------------------------------------------------
<S>                <C>              <C>              <C>            <C>                  <C>             <C>
 Aggressive       Growth Funds      Growth &         Balanced Fund  Income Funds         Tax-Free        Money
 Growth Fund                        Income Funds                                         Income Funds    Market Fund

 Growth           Large-Cap         Research Fund -  Balanced       World Bond-           National       U. S. Government
 Opportunities    Growth Fund       Large-Cap        Series**       Debenture Series      California     Securities Money
 Fund             Research Fund-    Series                          Global Fund -         Connecticut    Market Fund + ++
                  Small-Cap Value   Growth &                        Income Series         Florida
                  Series            Income Series                   High Yield Fund       Georgia
                  Alpha Series*     Affiliated Fund                 Bond-Debenture        Hawaii
 Developing       International                                     Fund                  Michigan
 Growth Fund      Series                                            Limited Duration      Minnesota
 Lord Abbett      Mid-Cap                                           U. S. Government      Missouri
 Developing       Value Fund                                        Securities Series+    New Jersey
 Growth Fund      Global Fund-                                      U. S. Government)     New York
 is closed to     Equity Series                                     Securities Series+    Pennsylvania
 new investors.                                                                           Texas
                                                                                          Washington


</TABLE>

Finding  the right  mutual  fund can be  confusing.  At Lord,  Abbett & Co.,  we
believe your investment  professional provides value in helping you identify and
under stand your investment  objectives  and,  ultimately,  offering fund recom
mendations suitable for your individual needs.

This publication,  when used as sales  literature,  is to be distributed only if
preceded or accompanied by a current prospectus for the fund(s) covered by this
report.

For more  complete  information  about any Lord Abbett fund,  in cluding  risks,
charges and ongoing expenses,  call your investment  professional or Lord Abbett
Distributor  LLC at  800-874-3733  for a  prospectus.  Read it carefully  before
investing.

The Lord Abbett Family of Funds lets you access more than 30 portfolios designed
to meet a variety of investment needs.

Diversification.  You  and  your  investment  professional  can  diversify  your
investments between equity and income funds.

Flexibility. As your investment goals change, your investment professional
can help you reallocate your portfolio.


You may  reallocate  assets  among  our  funds  at any  time.  Speak  with  your
investment professional to help you customize your investment plan.

Numbers to Keep Handy
For Shareholder Account or Statement Inquiries: 800-821-5129
For Literature Only: 800-874-3733
24-Hour Automated Shareholder
Service Line: 800-865-7582
Visit Our Web Site:
www.lordabbett.com

**   Lord Abbett Securities Trust - Alpha Series is a fund of funds investing in
     shares of Lord Abbett  Developing  Growth Fund, Lord Abbett Research Fund -
     Small-Cap  Value Series and Lord Abbett  Securities  Trust -  International
     Series.

**   Lord  Abbett  Balanced  Series  is a fund of funds  investing  in shares of
     certain other Lord Abbett funds.

+    An  investment in this Fund is neither  insured nor  guaranteed by the U.S.
     Government.

++   An  investment  in this Fund is not  insured or  guaranteed  by the Federal
     Deposit Insurance Corporation or any other government agency.  Although the
     Fund seeks to preserve the value of your  investment at $1.00 per share, it
     is possible to lose money by investing in the Fund. This Fund is managed to
     maintain and has maintained its stable $1.00 price per share.


[LOGO]

Lord Abbett mutual fund shares are distributed by:
LORD ABBETT DISTRIBUTOR LLC
-----------------------------------------------------
90 Hudson Street o Jersey City, New Jersey 07302-3973

                                                                     LAGOF-3-300
                                                                          (7/00)





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