TCW DW INCOME & GROWTH FUND
N-30D, 1998-10-01
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<PAGE>   1
 
TCW/DW INCOME & GROWTH FUND     Two World Trade Center, New York, New York 10048
 
LETTER TO THE SHAREHOLDERS July 31, 1998
 
DEAR SHAREHOLDER:
 
During the six-month period ended July 31, 1998, U.S. interest rates fell
because of lower projected real GDP growth and the Asian financial crisis, which
helped to push U.S. commodity prices significantly lower, placing further
downward pressure on inflation. However, the TCW/DW Income and Growth Fund's
advisor, TCW Funds Management, Inc. (TCW), remains concerned about accelerating
wage rates and the overall increase in service sector prices. If the Asian
economies begin to stabilize, the downward trend in inflation and interest rates
could come to an end.
 
Investor concerns regarding Asia, in addition to weakening U.S. corporate
profits, adversely affected small- and mid-cap issues during the period;
however, many large caps posted significant gains. Convertible securities posted
mixed results as the benefit of lower interest rates was somewhat offset by the
poor equity performance of the small- and mid-cap companies that represent a
significant portion of the convertible universe.
 
PERFORMANCE
 
For the six months ended July 31, 1998, TCW/DW Income and Growth Fund's Class C
shares produced a total return of 3.18 percent compared to 15.18 percent for the
Standard & Poor's Composite Stock Price Index (S&P 500), 2.81 percent for the
Lehman Brothers Government/Corporate Bond Index and 1.65 percent for the Lipper
Flexible Income Fund Average. For the same period, the Fund's Class A, B and D
shares had total returns of 3.50 percent, 3.19 percent and 3.56 percent,
respectively. The performance of the Fund's four share classes varies because of
differing expenses.
 
CONVERTIBLE SECURITIES
 
During the first half of 1998, the convertible portion of the Fund benefited
from its holdings in media, health care and retailing, and from its
underweighting in technology and energy. In the media area, AT&T's
<PAGE>   2
 
TCW/DW INCOME & GROWTH FUND
 
LETTER TO THE SHAREHOLDERS July 31, 1998, continued
 
acquisition of Telecommunications Inc. helped to drive the stock prices of cable
companies to record levels. The Fund's holdings in Telecommunications Inc.,
Mediaone, Cox Communications and Time Warner all appreciated significantly. In
addition, the Fund's holdings in the radio industry, such as Chancellor
Broadcasting and Clear Channel Communications, also did well. In the health care
sector, the Fund's positions in Elan, Omnicare, and Sepracor contributed
positively to performance. The retail sector, driven by robust consumer spending
over the past several months, was the strongest-performing sector. Some of the
best performance was generated by retailers holding dominant positions within
their niches, such as Costco, Home Depot, Staples and Rite Aid -- all of which
were represented in the Fund during the period under review.
 
The positive performance of the Fund's convertible holdings in media and
retailing were somewhat offset by declines in Cendant, Motorola and the
assisted-living industry. Cendant's stock declined when accounting problems were
found at its recently acquired holding CUC International. While the problems are
serious, TCW believes they are now reflected in Cendant's valuation leading them
to retain the position. Cendant is a high-quality credit with $1.3 billion in
cash, and the company generates significant free cash flow. However, TCW
liquidated the Fund's position in Motorola, because the problems at this company
appear relatively long-term in nature. TCW also continues to believe in the
long-term growth of the assisted-living industry and accordingly added slightly
to the Fund's position in Sunrise Assisted Living.
 
During the period under review, TCW liquidated the Fund's positions in Omnicom,
Sandoz, Chancellor Broadcasting, Staples and Cisco, because these convertibles
appreciated significantly. The proceeds have been reallocated to more defensive
convertibles, primarily in consumer staples and capital goods.
 
During the last few quarters, TCW has viewed both the new issue and secondary
markets as expensive, but in the second quarter of 1998 this pattern began to
reverse itself. As investors became more cautious about the prospects for the
financial markets, they demanded more reasonable terms on new issues. This
trend, which was most evident near the end of the second quarter, resulted in
several deals being priced very attractively. In the secondary market, hedge
funds were unable to guard against widening spreads and sold some of their
positions. As losses became magnified by leverage, these funds were forced to
sell securities quickly, which placed further downward pressure on the prices of
many convertibles.
 
The convertible new-issue market was very active during the first half of 1998.
In total, 103 new issues with a net value of $26.5 billion came to market. These
figures significantly exceeded the 66 issues with a net value of $11.7 billion
that were brought to market in the first half of 1997. The robust demand
 
                                       2
<PAGE>   3
 
TCW/DW INCOME & GROWTH FUND
 
LETTER TO THE SHAREHOLDERS July 31, 1998, continued
 
from investors for convertibles kept terms relatively aggressive, particularly
for speculative issuers. As a result, the Fund participated in only about one of
every five new issues brought to market.
 
HIGH-YIELD BONDS
 
The volatility in the Asian financial markets and heightened concerns over U.S.
economic growth resulted in a "flight to quality" by bond investors. Surging
demand for U.S. Treasury bonds and investors' expectations that the Fed would
leave rates unchanged at its June 30 meeting resulted in a Treasury market
rally. However, this did not carry over to the high-yield market whose issues
underperformed Treasuries during the period. This uncoupling of the
investment-grade and below-investment-grade fixed-income markets was more deeply
rooted than simply the high-yield market's traditional lag to movements in
interest rates. High-yield investors' potential enthusiasm over lower rates was
tempered by the prospects of an uptick in default rates and the corresponding
increase in credit losses in their portfolios. Thus, lower-rated issues fared
the worst during the period.
 
New issuance in the high-yield market continues to exceed all previously
achieved levels -- the $56.4 billion issued in the second quarter brought
first-half issuance to $106 billion. The amount of high-yield debt issued in the
first half of 1998 far exceeds that of any year prior to 1997, and the market is
on track to significantly outpace 1997's primary issuance of $126 billion.
However, during the second quarter the bottom-tier component of new issuance
eased somewhat. New high-yield offerings rated single-B and below fell from 75.4
percent of total new issuance in the first quarter to 66.3 percent in the second
quarter. This drop is due in part to the slowdown in mutual fund cash inflows
from $9.0 billion in the first quarter to $4.2 billion in the second, because
mutual funds tend to be the largest purchasers of speculative high-yield issues.
 
LOOKING AHEAD
 
With the equity market volatile, household exposure to the market at high levels
and no end in sight to the Asian crisis, TCW believes it is best to remain
cautious. TCW will continue to follow the course charted at the beginning of the
year by realizing profits on convertible positions that have appreciated
significantly and investing the proceeds in more-defensive issues. While TCW
remains tentative regarding technology and energy convertibles, they believe
valuations are attractive and have begun to add positions selectively in these
sectors. The high-yield portion of the Fund remains positioned to earn high
current income while minimizing the incidence of credit loss in any economic
environment. TCW will continue to focus on bonds issued by companies projected
to easily meet their fixed-charge obligations going forward, with plenty of
cushion to endure unforeseen sector or macroeconomic
 
                                       3
<PAGE>   4
 
TCW/DW INCOME & GROWTH FUND
 
LETTER TO THE SHAREHOLDERS July 31, 1998, continued
 
downturns. TCW believes that their research-driven process emphasizing superior,
upper-tier credits will continue to provide attractive returns as the economy
runs its full cyclical course.
 
We appreciate your ongoing support of TCW/DW Income and Growth Fund and look
forward to continuing to serve your investment needs.
 
Very truly yours,
 
/S/ CHARLES A. FIUMEFREDDO
CHARLES A. FIUMEFREDDO
Chairman of the Board
 
                                       4
<PAGE>   5
 
TCW/DW INCOME & GROWTH FUND
 
PORTFOLIO OF INVESTMENTS July 31, 1998 (unaudited)
 
<TABLE>
<CAPTION>
PRINCIPAL
AMOUNT IN                                           COUPON   MATURITY
THOUSANDS                                            RATE      DATE         VALUE
- ------------------------------------------------------------------------------------
<C>         <S>                                     <C>      <C>         <C>
            CONVERTIBLE BONDS (31.9%)
            Aerospace (1.1%)
 $   345    Hexcel Corp. .........................   7.00 %  08/01/03    $  373,414
     285    Morgan Stanley Group, Inc.+
             (exchangeable into Boeing Co. common
             stock)...............................   0.00    09/30/00       289,888
                                                                         ----------
                                                                            663,302
                                                                         ----------
            Auto Parts (1.2%)
     300    Magna International, Inc. - 144A*
             (Canada).............................   4.875   02/15/05       330,750
     345    Tower Automotive, Inc. - 144A*........   5.00    08/01/04       381,639
                                                                         ----------
                                                                            712,389
                                                                         ----------
            Biotechnology (0.5%)
      65    Centocor, Inc. .......................   4.75    02/15/05        63,622
     255    Centocor, Inc. - 144A*................   4.75    02/15/05       249,594
                                                                         ----------
                                                                            313,216
                                                                         ----------
            Business Services (1.0%)
     330    COREStaff, Inc. ......................   2.94    08/15/04       308,501
     295    Interim Services, Inc. ...............   4.50    06/01/05       290,852
                                                                         ----------
                                                                            599,353
                                                                         ----------
            Cable & Telecommunications (0.3%)
     190    Tele-Communications International,
             Inc. ................................   4.50    02/15/06       191,900
                                                                         ----------
 
            Commercial Services (0.5%)
     300    CUC International, Inc. - 144A*.......   3.00    02/15/02       279,534
                                                                         ----------
 
            Computer Software (0.6%)
     745    Network Associates, Inc. - 144A*......   0.00    02/13/18       350,813
                                                                         ----------
 
            Drugs (3.7%)
     810    Athena Neurosciences, Inc. - 144A*....   4.75    11/15/04     1,006,854
     400    Dura Pharmaceuticals, Inc. ...........   3.50    07/15/02       344,000
     430    Sepracor, Inc. - 144A*................   6.25    02/15/05       584,306
     260    Morgan Stanley Group, Inc.+
             (exchangeable into Johnson & Johnson
             Co. common stock)....................   2.00    03/29/02       320,289
                                                                         ----------
                                                                          2,255,449
                                                                         ----------
            Electronics - Semiconductors (0.5%)
     245    Analog Devices, Inc. .................   3.50    12/01/00       282,245
                                                                         ----------
</TABLE>
 
        SEE NOTES TO FINANCIAL STATEMENTS
 
                                       5
<PAGE>   6
 
TCW/DW INCOME & GROWTH FUND
 
PORTFOLIO OF INVESTMENTS July 31, 1998 (unaudited) continued
 
<TABLE>
<CAPTION>
PRINCIPAL
AMOUNT IN                                           COUPON   MATURITY
THOUSANDS                                            RATE      DATE         VALUE
- ------------------------------------------------------------------------------------
<C>         <S>                                     <C>      <C>         <C>
            Entertainment (2.3%)
 $   180    Action Performance
             Companies - 144A*....................   4.75 %  04/01/05    $  165,127
   1,120    Clear Channel Communications, Inc. ...   2.625   04/01/03     1,233,277
                                                                         ----------
                                                                          1,398,404
                                                                         ----------
            Financial (0.9%)
     540    Swiss Life Finance Ltd. - 144A*.......   2.00    05/20/05       542,700
                                                                         ----------
 
            Healthcare Services (5.5%)
     490    Alternative Living Services, Inc. ....   5.25    12/15/02       567,655
     300    Assisted Living Concepts, Inc. .......   6.00    11/01/02       276,000
     360    Assisted Living Concepts,
             Inc. - 144A*.........................   5.625   05/01/03       307,451
     650    Concentra Managed Care,
             Inc. - 144A*.........................   4.50    03/15/03       553,923
     545    Omnicare, Inc. - 144A*................   5.00    12/01/07       656,044
     275    Quadramed Corp. - 144A*...............   5.25    05/01/05       297,905
     280    Quintiles Transportational
             Corp. - 144A*........................   4.25    05/31/00       341,905
     100    Sunrise Assisted Living, Inc. ........   5.50    06/15/02       104,482
     200    Sunrise Assisted Living,
             Inc. - 144A*.........................   5.50    06/15/02       208,964
                                                                         ----------
                                                                          3,314,329
                                                                         ----------
            Insurance (0.6%)
     285    American International Group, Inc. ...   2.25    07/30/04       370,500
                                                                         ----------
 
            Leisure (0.6%)
     570    News America Holdings, Inc. ..........   0.00    03/11/13       332,230
                                                                         ----------
 
            Leisure Time (0.4%)
     255    Speedway Motorsports, Inc. ...........   5.75    09/30/03       263,407
                                                                         ----------
 
            Miscellaneous (0.5%)
     290    Level One Communications, Inc. .......   4.00    09/01/04       309,372
                                                                         ----------
 
            Pollution Control (3.8%)
     295    Thermo Electron Corp. - 144A*.........   4.25    01/01/03       275,683
   1,000    U.S. Filter Corp. ....................   4.50    12/15/01     1,003,960
     775    Waste Management, Inc. ...............   4.00    02/01/02     1,024,945
                                                                         ----------
                                                                          2,304,588
                                                                         ----------
            Real Estate Investment Trust (0.7%)
     135    LTC Properties, Inc. .................   8.25    07/01/01       139,891
     370    Security Capital U.S.
             Realty - 144A*.......................   2.00    05/22/03       297,850
                                                                         ----------
                                                                            437,741
                                                                         ----------
</TABLE>
 
        SEE NOTES TO FINANCIAL STATEMENTS
 
                                       6
<PAGE>   7
 
TCW/DW INCOME & GROWTH FUND
 
PORTFOLIO OF INVESTMENTS July 31, 1998 (unaudited) continued
 
<TABLE>
<CAPTION>
PRINCIPAL
AMOUNT IN                                           COUPON   MATURITY
THOUSANDS                                            RATE      DATE         VALUE
- ------------------------------------------------------------------------------------
<C>         <S>                                     <C>      <C>         <C>
            Retail (2.1%)
 $   270    Charming Shoppes, Inc. ...............   7.50 %  07/15/06    $  251,370
   1,045    Costco Companies, Inc. - 144A*........   0.00    08/19/17       741,752
     155    Home Depot, Inc. .....................   3.25    10/01/01       285,775
                                                                         ----------
                                                                          1,278,897
                                                                         ----------
            Technology (2.1%)
     265    Adaptec, Inc. - 144A*.................   4.75    02/01/04       200,594
     115    Adaptec, Inc. ........................   4.75    02/01/04        87,050
     360    Merrill Lynch & Co., Inc. ............   0.00    02/02/05       398,700
     525    Safeguard Scientifics, Inc. - 144A*...   6.00    02/01/06       588,657
                                                                         ----------
                                                                          1,275,001
                                                                         ----------
            Telecommunications (2.5%)
     440    Bell Atlantic Finance
             Service - 144A*......................   5.75    04/01/03       455,620
     275    Comverse Technology, Inc. - 144A*.....   4.50    07/01/05       281,314
     195    MRV Communications Inc. - 144A*.......   5.00    06/15/03       189,150
     415    Premiere Technologies, Inc. - 144A*...   5.75    07/01/04       286,155
     280    SmarTalk TeleServices, Inc. - 144A*...   5.75    09/15/04       239,663
      80    SmarTalk TeleServices, Inc. ..........   5.75    09/15/04        68,475
                                                                         ----------
                                                                          1,520,377
                                                                         ----------
            Transportation (0.5%)
     250    Blue Bird Body Co. (Shares B).........  10.75    11/15/06       272,500
                                                                         ----------
 
            TOTAL CONVERTIBLE BONDS
             (Identified Cost $18,272,713)............................   19,268,247
                                                                         ----------
 
            CORPORATE BONDS (49.5%)
            Aerospace (0.3%)
     150    Wyman-Gordon Co. .....................   8.00    12/15/07       153,000
                                                                         ----------
 
            Auto Parts (0.8%)
     225    Eagle Picher Industries, Inc. ........   9.375   03/01/08       227,813
     200    Hayes Wheels International, Inc. .....  11.00    07/15/06       225,000
                                                                         ----------
                                                                            452,813
                                                                         ----------
            Banks (0.3%)
      75    Chevy Chase Savings Bank..............   9.25    12/01/05        76,313
     125    Chevy Chase Savings Bank, F.S.B.......   9.25    12/01/08       126,875
                                                                         ----------
                                                                            203,188
                                                                         ----------
            Broadcast Media (0.9%)
     100    JCAC, Inc. ...........................  10.125   06/15/06       109,750
     145    Outdoor Communications, Inc. .........   9.25    08/15/07       150,800
     275    STC Broadcasting, Inc. ...............  11.00    03/15/07       304,563
                                                                         ----------
                                                                            565,113
                                                                         ----------
</TABLE>
 
        SEE NOTES TO FINANCIAL STATEMENTS
 
                                       7
<PAGE>   8
 
TCW/DW INCOME & GROWTH FUND
 
PORTFOLIO OF INVESTMENTS July 31, 1998 (unaudited) continued
 
<TABLE>
<CAPTION>
PRINCIPAL
AMOUNT IN                                           COUPON   MATURITY
THOUSANDS                                            RATE      DATE         VALUE
- ------------------------------------------------------------------------------------
<C>         <S>                                     <C>      <C>         <C>
            Building Materials (1.4%)
 $   225    American Standard Co. ................   7.375%  02/01/08    $  222,750
     100    MDC Holdings, Inc. ...................   8.375   02/01/08       101,375
     350    Nortek Inc. - 144A*...................   8.875   08/01/08       352,625
     150    Standard Pacific Corp. (Series A).....   8.00    02/15/08       149,625
                                                                         ----------
                                                                            826,375
                                                                         ----------
            Business Services (1.5%)
     631    American Pad & Paper Co. .............  13.00    11/15/05       353,360
     150    Federal Data Corp. ...................  10.125   08/01/05       154,500
     100    Pierce Leahy Command Co. - 144A*......   8.125   05/15/08        99,000
     300    Rental Service Corp. - 144A*..........   9.00    05/15/08       303,000
                                                                         ----------
                                                                            909,860
                                                                         ----------
            Business Services - Distributors
             (1.8%)
      75    American Business Information, Inc. -
             144A*................................   9.50    06/15/08        76,500
     100    Anthony Crane Rentals - 144A*.........  10.375   08/01/08       100,250
     150    Coinmach Corp. (Series D).............  11.75    11/15/05       165,750
     350    Iron Mountain, Inc. ..................  10.125   10/01/06       380,624
     350    Safety-Kleen Services - 144A*.........   9.25    06/01/08       362,250
                                                                         ----------
                                                                          1,085,374
                                                                         ----------
            Cable & Telecommunications (0.9%)
     200    Adelphia Communications Corp. (Series
             B)...................................   9.25    10/01/02       207,500
     100    Adelphia Communications Corp. (Series
             B)...................................   8.375   02/01/08       101,000
      60    Paging Network, Inc. .................  10.125   08/01/07        63,450
     150    Paging Network, Inc. .................  10.00    10/15/08       158,625
                                                                         ----------
                                                                            530,575
                                                                         ----------
            Cable/Cellular (1.5%)
      75    Century Communications................   9.50    03/01/05        81,750
      75    Century Communications................   8.75    10/01/07        80,250
     150    Classic Cable, Inc. - 144A*...........   9.875   08/01/08       156,750
      70    Comcast Cellular Holdings, Inc.
             (Series B)...........................   9.50    05/01/07        74,200
      25    CSC Holdings, Inc. ...................   9.875   05/15/06        27,313
     300    CSC Holdings, Inc. ...................   7.25    07/15/08       297,909
      50    CSC Holdings, Inc. (Series B).........   8.125   08/15/09        52,700
     125    CSC Holdings, Inc. ...................   7.625   07/15/18       124,473
                                                                         ----------
                                                                            895,345
                                                                         ----------
</TABLE>
 
        SEE NOTES TO FINANCIAL STATEMENTS
 
                                       8
<PAGE>   9
 
TCW/DW INCOME & GROWTH FUND
 
PORTFOLIO OF INVESTMENTS July 31, 1998 (unaudited) continued
 
<TABLE>
<CAPTION>
PRINCIPAL
AMOUNT IN                                           COUPON   MATURITY
THOUSANDS                                            RATE      DATE         VALUE
- ------------------------------------------------------------------------------------
<C>         <S>                                     <C>      <C>         <C>
            Chemicals (0.8%)
 $    60    Geo Specialty Chemicals - 144A*.......  10.125%  08/01/08    $   61,200
     100    Polymer Group Inc. - 144A*............   8.75    03/01/08       101,500
     300    Texas Petrochemicals Corp. ...........  11.125   07/01/06       322,500
                                                                         ----------
                                                                            485,200
                                                                         ----------
            Commercial Services (1.4%)
     150    Intermedia Communications, Inc.
             (Series B)...........................   8.50    01/15/08       152,250
     250    MasTec, Inc. (Series B)...............   7.75    02/01/08       243,750
     415    NEXTLINK Communications, Inc. ........   9.625   10/01/07       431,600
                                                                         ----------
                                                                            827,600
                                                                         ----------
            Communications Equipment (0.8%)
     175    Globalstar L.P./Capital Corp. ........  11.25    06/15/04       161,875
     325    Globalstar L.P./Capital Corp. ........  10.75    11/01/04       295,750
                                                                         ----------
                                                                            457,625
                                                                         ----------
            Consumer - Noncyclical (3.1%)
     225    Boyds Collection Ltd. - 144A*.........   9.00    05/15/08       225,000
     190    Cott Corp. (Canada)...................   9.375   07/01/05       195,225
     175    Holmes Products Corp. (Series B)......   9.875   11/15/07       178,063
     300    Home Interiors & Gift - 144A*.........  10.125   06/01/08       312,000
     475    International Home Foods, Inc. .......  10.375   11/01/06       523,687
     100    Revlon Consumer Products, Inc. .......   8.125   02/01/06       101,250
     300    Revlon Consumer Products, Inc. .......   8.625   02/01/08       306,749
                                                                         ----------
                                                                          1,841,974
                                                                         ----------
            Containers (1.3%)
     275    Huntsman Packaging Corp. .............   9.125   10/01/07       280,500
     275    Plastic Containers, Inc. (Series B)...  10.00    12/15/06       296,312
     225    U.S. Can Corp. .......................  10.125   10/15/06       233,438
                                                                         ----------
                                                                            810,250
                                                                         ----------
            Energy (0.5%)
     150    National Energy Group, Inc. (Series
             D)...................................  10.75    11/01/06       134,250
     154    Transamerican Energy (Series B).......  11.50    06/15/02       140,525
                                                                         ----------
                                                                            274,775
                                                                         ----------
            Entertainment (0.3%)
     150    Six Flags Entertainment Corp. ........   8.875   04/01/06       155,250
                                                                         ----------
 
            Entertainment/Gaming (1.6%)
     200    Boyd Gaming Corp. ....................   9.25    10/01/03       211,000
     115    Grand Casinos, Inc. ..................  10.125   12/01/03       125,925
</TABLE>
 
        SEE NOTES TO FINANCIAL STATEMENTS
 
                                       9
<PAGE>   10
 
TCW/DW INCOME & GROWTH FUND
 
PORTFOLIO OF INVESTMENTS July 31, 1998 (unaudited) continued
 
<TABLE>
<CAPTION>
PRINCIPAL
AMOUNT IN                                           COUPON   MATURITY
THOUSANDS                                            RATE      DATE         VALUE
- ------------------------------------------------------------------------------------
<C>         <S>                                     <C>      <C>         <C>
 $   450    Hard Rock Hotel Inc. - 144A*..........   9.25 %  04/01/05    $  464,063
     175    Hollywood Park (Series B).............   9.50    08/01/07       178,500
                                                                         ----------
                                                                            979,488
                                                                         ----------
            Finance - Leasing (1.1%)
     290    Williams Scotsman, Inc. ..............   9.875   06/01/07       300,150
     295    Xerox Credit Corp. ...................   2.875   07/01/02       355,000
                                                                         ----------
                                                                            655,150
                                                                         ----------
            Financial Services (1.8%)
     300    Forest City Enterprises, Inc. ........   8.50    03/15/08       303,000
     700    GS Escrow Corp - 144A*................   7.125   08/01/05       699,125
      65    Nationwide Credit, Inc. - 144A*.......  10.25    01/15/08        65,163
                                                                         ----------
                                                                          1,067,288
                                                                         ----------
            Food Services (1.2%)
     325    Fred Meyer, Inc. .....................   7.45    03/01/08       327,191
      85    Jitney-Jungle Stores of America,
             Inc. ................................  12.00    03/01/06        96,688
     300    Jitney-Jungle Stores of America,
             Inc. ................................  10.375   09/15/07       325,500
                                                                         ----------
                                                                            749,379
                                                                         ----------
            Forest Products, Paper & Packaging
             (1.4%)
     125    Paperboard Industrial International,
             Inc. ................................   8.375   09/15/07       125,313
     225    Riverwood International Corp. ........  10.625   08/01/07       236,250
     435    Tembec Finance Corp. .................   9.875   09/30/05       461,100
                                                                         ----------
                                                                            822,663
                                                                         ----------
            Health Equipment & Services (0.4%)
     225    Prime Medical Services Inc. ..........   8.75    04/01/08       220,500
                                                                         ----------
 
            Health Services (0.6%)
     385    Integrated Health Services (Series
             A)...................................   9.50    09/15/07       394,625
                                                                         ----------
 
            Healthcare (0.7%)
     360    Dade International, Inc. (Series B)...  11.125   05/01/06       404,100
                                                                         ----------
 
            Hospital Management & Health
             Maintenance Organizations (0.2%)
     100    Rural Metro Corp. ....................   7.875   03/15/08        95,000
                                                                         ----------
 
            Industrials (0.8%)
     440    Diamond Offshore Drilling, Inc. ......   3.75    02/15/07       463,967
                                                                         ----------
 
            Lodging (3.2%)
     500    HMC Acquisition Properties (Series
             B)...................................   9.00    12/15/07       552,734
     900    HMH Properties, Inc. (Series B).......   7.875   08/01/08       896,624
      75    Signature Resorts, Inc. ..............   9.25    05/15/06        75,000
</TABLE>
 
        SEE NOTES TO FINANCIAL STATEMENTS
 
                                       10
<PAGE>   11
 
TCW/DW INCOME & GROWTH FUND
 
PORTFOLIO OF INVESTMENTS July 31, 1998 (unaudited) continued
 
<TABLE>
<CAPTION>
PRINCIPAL
AMOUNT IN                                           COUPON   MATURITY
THOUSANDS                                            RATE      DATE         VALUE
- ------------------------------------------------------------------------------------
<C>         <S>                                     <C>      <C>         <C>
 $    75    Signature Resorts, Inc. ..............   9.75 %  10/01/07    $   72,375
     400    Starwood Hotels & Resorts.............   7.375   11/15/15       372,632
                                                                         ----------
                                                                          1,969,365
                                                                         ----------
            Manufacturing (4.5%)
     200    Ametek Inc. - 144A*...................   7.20    07/15/08       199,296
     215    BE Aerospace, Inc. (Series B).........   8.00    03/01/08       217,150
     335    Communications & Power Industries,
             Inc. (Series B)......................  12.00    08/01/05       375,200
     275    Doskocil Manufacturing Co., Inc. .....  10.125   09/15/07       287,375
      50    Foamex L.P. ..........................   9.875   06/15/07        54,125
      60    GSI Group Inc. .......................  10.25    11/01/07        63,000
     100    International Wire Group (Series B)...  11.75    06/01/05       109,750
     500    Jordan Telecom Products (Series B)....   9.875   08/01/07       512,499
     150    Morris Materials Handling - 144A*.....   9.50    04/01/08       136,500
     350    Packaged Ice, Inc. ...................   9.75    02/01/05       360,500
     200    Telecommunication Techniques
             Co. - 144A*..........................   9.75    05/15/08       206,500
     175    Viasystems, Inc. - 144A*..............   9.75    06/01/07       168,875
                                                                         ----------
                                                                          2,690,770
                                                                         ----------
            Media Group (2.5%)
     500    Adams Outdoor Advertising, L.P. ......  10.75    03/15/06       549,999
      50    Chancellor Media Corp. ...............   9.375   10/01/04        52,688
     850    Chancellor Media Corp. (Series B).....   8.125   12/15/07       861,687
      25    Outdoor Systems, Inc. ................   8.875   06/15/07        26,688
                                                                         ----------
                                                                          1,491,062
                                                                         ----------
            Metals & Mining (1.5%)
     300    Geneva Steel Co. .....................  11.125   03/15/01       276,000
     300    Metal Management, Inc. - 144A*........  10.00    05/15/08       292,500
     200    P&L Coal Holdings Corp. - 144A*.......   8.875   05/15/08       207,750
     150    Wheeling-Pittsburg Corp. .............   9.25    11/15/07       153,750
                                                                         ----------
                                                                            930,000
                                                                         ----------
            Oil International - Exploration &
             Production (0.5%)
     275    Magnum Hunter Resources, Inc. ........  10.00    06/01/07       280,500
                                                                         ----------
 
            Paper & Forest Products (0.5%)
     300    Stone Container Corp. ................  10.75    10/01/02       319,125
                                                                         ----------
 
            Publishing (1.5%)
     175    American Media Operations, Inc. ......  11.625   11/15/04       187,250
     425    Garden State Newspapers (Series B)....   8.75    10/01/09       435,625
</TABLE>
 
        SEE NOTES TO FINANCIAL STATEMENTS
 
                                       11
<PAGE>   12
 
TCW/DW INCOME & GROWTH FUND
 
PORTFOLIO OF INVESTMENTS July 31, 1998 (unaudited) continued
 
<TABLE>
<CAPTION>
PRINCIPAL
AMOUNT IN                                           COUPON   MATURITY
THOUSANDS                                            RATE      DATE         VALUE
- ------------------------------------------------------------------------------------
<C>         <S>                                     <C>      <C>         <C>
 $    50    Primedia, Inc. .......................   7.625%  04/01/08    $   49,250
     250    Von Hoffman Press, Inc. - 144A*.......  10.375   05/15/07       261,875
                                                                         ----------
                                                                            934,000
                                                                         ----------
            Restaurants (0.6%)
     225    American Restaurant Group,
             Inc. - 144A*.........................  11.50    02/15/03       225,000
     150    Perkins Family Restaurant, L.P.
             (Series B)...........................  10.125   12/15/07       159,563
                                                                         ----------
                                                                            384,563
                                                                         ----------
            Retail (2.5%)
     100    Cole National Group, Inc. ............   8.625   08/15/07       103,000
     100    Finlay Fine Jewelry Corp. ............   8.375   05/01/08       101,500
     346    Guitar Center Management..............  11.00    07/01/06       381,465
     100    Leslie's Poolmart.....................  10.375   07/15/04       105,000
     600    Michaels Stores, Inc. ................  10.875   06/15/06       662,999
     200    Zale Corp. (Series B).................   8.50    10/01/07       207,000
                                                                         ----------
                                                                          1,560,964
                                                                         ----------
            Semiconductors (0.5%)
     370    ST Microelectronics N.V. (France).....   0.00    06/10/08       306,175
                                                                         ----------
 
            Telecommunications (2.0%)
     150    Intermedia Communications, Inc.
             (Series B)...........................   8.875   11/01/07       154,875
     200    Level 3 Communications, Inc. .........   9.125   05/01/08       199,250
     825    Verio Inc. - 144A*....................  10.375   04/01/05       866,250
                                                                         ----------
                                                                          1,220,375
                                                                         ----------
            Textiles - Apparel (0.4%)
      50    Globe Manufacturing Corp. - 144A*.....  10.00    08/01/08        50,375
     175    Westpoint Stevens, Inc. - 144A*.......   7.875   06/15/08       178,938
                                                                         ----------
                                                                            229,313
                                                                         ----------
            Transportation (1.1%)
      75    Atlas Air, Inc. ......................  10.75    08/01/05        80,625
     550    Moran Transportation Co. .............  11.75    07/15/04       607,750
                                                                         ----------
                                                                            688,375
                                                                         ----------
            Utilities (0.8%)
     180    Cal Energy Co., Inc. .................   9.50    09/15/06       194,400
      75    Cal Energy Co., Inc. .................   7.63    10/15/07        74,990
</TABLE>
 
        SEE NOTES TO FINANCIAL STATEMENTS
 
                                       12
<PAGE>   13
 
TCW/DW INCOME & GROWTH FUND
 
PORTFOLIO OF INVESTMENTS July 31, 1998 (unaudited) continued
 
<TABLE>
<CAPTION>
PRINCIPAL
AMOUNT IN                                           COUPON   MATURITY
THOUSANDS                                            RATE      DATE         VALUE
- ------------------------------------------------------------------------------------
<C>         <S>                                     <C>      <C>         <C>
 $   100    Niagara Mohawk Power (Series F).......   7.625%  10/01/05    $  101,515
     125    Niagara Mohawk Power (Series G).......   7.75    10/01/08       128,726
                                                                         ----------
                                                                            499,631
                                                                         ----------
            TOTAL CORPORATE BONDS 
            (Identified Cost $29,701,228)............................    29,830,695
                                                                         ----------
</TABLE>
 
<TABLE>
<CAPTION>
NUMBER OF
 SHARES
- ---------
<C>         <S>                                                          <C>
            CONVERTIBLE PREFERRED STOCKS (17.0%)
            Aerospace (0.4%)
  14,700    Cooper Industries, Inc. $0.81..............................     220,500
                                                                         ----------
 
            Banks (1.7%)
  10,500    CNB Capital Trust $1.50....................................     288,750
   4,000    St. George Bank Ltd. $4.50 - 144A*.........................     195,000
  18,000    WBK Trust (STRYPES) $3.35..................................     554,625
                                                                         ----------
                                                                          1,038,375
                                                                         ----------
            Cable & Telecommunications (3.8%)
  17,400    Houston Industries, Inc. $3.22.............................   1,361,550
   5,900    Mediaone Group Inc. $2.25..................................     600,694
   5,200    Mediaone Group Inc. $3.63..................................     302,900
                                                                         ----------
                                                                          2,265,144
                                                                         ----------
            Commercial Services (0.4%)
   6,600    Vanstar Financing Trust $3.375 - 144A*.....................     242,629
                                                                         ----------
 
            Consumer Services (1.6%)
   4,100    Cendant Corp. $0.65........................................     111,725
  25,800    Cendant Corp. $3.75........................................     848,175
                                                                         ----------
                                                                            959,900
                                                                         ----------
            Equipment (0.7%)
   8,000    United Rentals Trust $3.25 - 144A*.........................     400,000
                                                                         ----------
 
            Financial Services (0.7%)
  11,300    Merrill Lynch & Co., Inc. $3.12 (STRYPES) (exchangeable
             into Cox Cable Communications Inc. common stock)..........     465,424
                                                                         ----------
 
            Foods & Beverages (0.5%)
   6,400    Suiza Capital Trust II. $2.75 - 144A*......................     290,822
                                                                         ----------
</TABLE>
 
        SEE NOTES TO FINANCIAL STATEMENTS
 
                                       13
<PAGE>   14
 
TCW/DW INCOME & GROWTH FUND
 
PORTFOLIO OF INVESTMENTS July 31, 1998 (unaudited) continued
 
<TABLE>
<CAPTION>
NUMBER OF
 SHARES                                                                     VALUE
- ------------------------------------------------------------------------------------
<C>         <S>                                                          <C>
            Hotels (0.4%)
   4,900    Host Marriott Financial Trust $3.375 - 144A*...............  $  244,814
                                                                         ----------
 
            Insurance (1.0%)
  10,200    AmerUs Life Holdings, Inc. $2.21...........................     315,567
   2,800    Life Re Capital Trust II $3.96.............................     209,825
   9,500    Philadelphia Consolidated Holding Co. $0.70................      91,438
                                                                         ----------
                                                                            616,830
                                                                         ----------
            Medical Services (0.5%)
   6,000    Laboratory Corp. of America (Series A) $4.25...............     315,000
                                                                         ----------
 
            Oil & Gas Products (0.5%)
   4,200    Occidental Petroleum Corp. (Series A) $3.00
             (exchangeable into Canadian Occidental Petroleum common
             stock)....................................................     280,875
                                                                         ----------
 
            Packaging & Bottling (0.5%)
   6,500    Sealed Air Corp. (Series A) $2.00..........................     290,063
                                                                         ----------
 
            Pollution Control (0.2%)
   3,800    Laidlaw One, Inc. (Canada) $1.22...........................     133,000
                                                                         ----------
 
            Publishing (0.6%)
  12,500    Readers Digest Association, Inc. $1.93.....................     337,500
                                                                         ----------
 
            Railroads (0.9%)
  12,000    Union Pacific Capital Trust $3.125 - 144A*.................     545,256
                                                                         ----------
 
            Restaurants (0.5%)
   5,400    Apple South Inc. $3.50 - 144A*.............................     282,150
                                                                         ----------
 
            Retail (1.0%)
   7,600    Dollar General (STRYPES) $3.35.............................     305,900
   5,200    Kmart Financing I $3.875...................................     322,400
                                                                         ----------
                                                                            628,300
                                                                         ----------
            Technology (1.1%)
   6,600    Morgan Stanley Group, Inc. $3.99+
             (exchangeable into Cisco Systems Inc. common stock).......     671,055
                                                                         ----------
 
            TOTAL CONVERTIBLE PREFERRED STOCKS 
            (Identified Cost $9,108,846)...............................  10,227,637
                                                                         ----------
</TABLE>
 
        SEE NOTES TO FINANCIAL STATEMENTS
 
                                       14
<PAGE>   15
 
TCW/DW INCOME & GROWTH FUND
 
PORTFOLIO OF INVESTMENTS July 31, 1998 (unaudited) continued
 
<TABLE>
<CAPTION>
NUMBER OF                                                    EXPIRATION
WARRANTS                                                        DATE         VALUE
- -------------------------------------------------------------------------------------
<C>         <S>                                              <C>         <C>
            WARRANT (a) (0.0%)
            Entertainment/Gaming
   4,685    Fitzgeralds Gaming Corp. - 144A*  
               (Identified Cost $21,083)...................   12/19/98   $     9,370
                                                                         -----------
</TABLE>
 
<TABLE>
<CAPTION>
PRINCIPAL
AMOUNT IN
THOUSANDS
- ---------
<S>         <C>                                                  <C>     <C>
            SHORT-TERM INVESTMENT (2.4%)
            REPURCHASE AGREEMENT
 $ 1,440    The Bank of New York 5.50% due 08/03/98  
               (dated 07/31/98; proceeds $1,440,988) (b)  
               (Identified Cost $1,440,328)............................    1,440,328
                                                                         -----------
            TOTAL INVESTMENTS 
               (Identified Cost $58,544,198) (c).............    100.8%   60,776,277

            LIABILITIES IN EXCESS OF OTHER ASSETS.............    (0.8)     (455,839)
                                                                 -----   -----------
 
            NET ASSETS.........................................  100.0%  $60,320,438
                                                                 =====   ===========
</TABLE>
 
- ---------------------
STRYPES Structured yield product exchangeable for stock.
   *    Resale is restricted to qualified institutional investors.
   +    Issuer is an affiliate of the Fund's Manager, Morgan Stanley Dean
        Witter Services Company Inc.
  (a)   Non-income producing security.
  (b)   Collateralized by $1,138,381 U.S. Treasury Bond 11.125% due 08/15/03
        valued at $1,469,134.
  (c)   The aggregate cost for federal income tax purposes approximates
        identified cost. The aggregate gross unrealized appreciation is
        $3,930,056 and the aggregate gross unrealized depreciation is
        $1,697,977, resulting in net unrealized appreciation of $2,232,079.
 
        SEE NOTES TO FINANCIAL STATEMENTS
 
                                       15
<PAGE>   16
 
TCW/DW INCOME AND GROWTH FUND
 
FINANCIAL STATEMENTS
 
<TABLE>
<S>                                                           <C>
STATEMENT OF ASSETS AND LIABILITIES
July 31, 1998 (unaudited)
ASSETS:
Investments in securities, at value
 (identified cost $58,544,198)..............................  $60,776,277
Receivable for:
    Investments sold........................................    1,335,724
    Interest................................................      915,760
    Dividends...............................................       29,826
    Shares of beneficial interest sold......................       16,791
Prepaid expenses and other assets...........................       35,579
                                                              -----------
    TOTAL ASSETS............................................   63,109,957
                                                              -----------
LIABILITIES:
Payable for:
    Investments purchased...................................    2,617,294
    Plan of distribution fee................................       39,148
    Shares of beneficial interest repurchased...............       38,952
    Management fee..........................................       23,509
    Investment advisory fee.................................       15,673
Accrued expenses and other payables.........................       54,943
                                                              -----------
    TOTAL LIABILITIES.......................................    2,789,519
                                                              -----------
    NET ASSETS..............................................  $60,320,438
                                                              ===========
COMPOSITION OF NET ASSETS:
Paid-in-capital.............................................  $54,955,631
Net unrealized appreciation.................................    2,232,079
Accumulated undistributed net investment income.............      310,394
Accumulated undistributed net realized gain.................    2,822,334
                                                              -----------
    NET ASSETS..............................................  $60,320,438
                                                              ===========
CLASS A SHARES:
Net Assets..................................................      $62,993
Shares Outstanding (unlimited authorized, $.01 par value)...        5,477
    NET ASSET VALUE PER SHARE...............................       $11.50
                                                                   ======
    MAXIMUM OFFERING PRICE PER SHARE,
     (net asset value plus 4.44% of net asset value)........       $12.01
                                                                   ======
CLASS B SHARES:
Net Assets..................................................   $7,894,339
Shares Outstanding (unlimited authorized, $.01 par value)...      686,564
    NET ASSET VALUE PER SHARE...............................       $11.50
                                                                   ======
CLASS C SHARES:
Net Assets..................................................  $52,352,093
Shares Outstanding (unlimited authorized, $.01 par value)...    4,549,528
    NET ASSET VALUE PER SHARE...............................       $11.51
                                                                   ======
CLASS D SHARES:
Net Assets..................................................      $11,013
Shares Outstanding (unlimited authorized, $.01 par value)...          957
    NET ASSET VALUE PER SHARE...............................       $11.51
                                                                   ======
</TABLE>
 
        SEE NOTES TO FINANCIAL STATEMENTS
 
                                       16
<PAGE>   17
 
TCW/DW INCOME AND GROWTH FUND
 
FINANCIAL STATEMENTS, continued
 
<TABLE>
<S>                                                           <C>
STATEMENT OF OPERATIONS
For the six months ended July 31, 1998 (unaudited)

NET INVESTMENT INCOME:

INCOME
Interest....................................................  $ 1,786,783
Dividends...................................................      252,811
                                                              -----------
 
    TOTAL INCOME............................................    2,039,594
                                                              -----------
 
EXPENSES
Investment advisory fee.....................................      231,632
Plan of distribution fee (Class A shares)...................           41
Plan of distribution fee (Class B shares)...................       26,676
Plan of distribution fee (Class C shares)...................      200,171
Registration fees...........................................       73,637
Transfer agent fees and expenses............................       28,916
Shareholder reports and notices.............................       24,140
Professional fees...........................................       20,742
Trustees' fees and expenses.................................       15,952
Custodian fees..............................................       12,548
Organizational expenses.....................................        6,325
Other.......................................................        7,701
                                                              -----------
 
    TOTAL EXPENSES..........................................      648,481
                                                              -----------
 
    NET INVESTMENT INCOME...................................    1,391,113
                                                              -----------
 
NET REALIZED AND UNREALIZED GAIN (LOSS):
Net realized gain...........................................    2,826,909
Net change in unrealized appreciation.......................   (2,245,984)
                                                              -----------
 
    NET GAIN................................................      580,925
                                                              -----------
 
NET INCREASE................................................  $ 1,972,038
                                                              ===========
</TABLE>
 
        SEE NOTES TO FINANCIAL STATEMENTS
 
                                       17
<PAGE>   18
 
TCW/DW INCOME AND GROWTH FUND
 
FINANCIAL STATEMENTS, continued
<TABLE>
<CAPTION>
STATEMENT OF CHANGES IN NET ASSETS
                                                       FOR THE SIX      FOR THE YEAR
                                                       MONTHS ENDED         ENDED
                                                      JULY 31, 1998   JANUARY 31, 1998*
- ---------------------------------------------------------------------------------------
                                                       (unaudited)
<S>                                                   <C>             <C>
INCREASE (DECREASE) IN NET ASSETS:

OPERATIONS:
Net investment income................................  $ 1,391,113       $ 2,953,221
Net realized gain....................................    2,826,909         4,031,439
Net change in unrealized appreciation................   (2,245,984)          950,969
                                                       -----------       -----------
 
    NET INCREASE.....................................    1,972,038         7,935,629
                                                       -----------       -----------
 
DIVIDENDS AND DISTRIBUTIONS TO SHAREHOLDERS FROM:
Net investment income
    Class A shares...................................       (1,113)             (582)
    Class B shares...................................     (159,344)         (144,769)
    Class C shares...................................   (1,192,722)       (2,979,361)
    Class D shares...................................         (280)             (290)
 
Net realized gain
    Class A shares...................................       (1,085)           (1,133)
    Class B shares...................................     (139,454)         (298,812)
    Class C shares...................................     (954,908)       (3,495,390)
    Class D shares...................................         (196)             (491)
                                                       -----------       -----------
 
    TOTAL DIVIDENDS AND DISTRIBUTIONS................   (2,449,102)       (6,920,828)
                                                       -----------       -----------
Net decrease from transactions in shares of
 beneficial interest.................................     (700,817)         (457,056)
                                                       -----------       -----------
 
    NET INCREASE (DECREASE)..........................   (1,177,881)          557,745
 
NET ASSETS:
Beginning of period..................................   61,498,319        60,940,574
                                                       -----------       -----------
    END OF PERIOD
    (Including undistributed net investment income of
    $310,394 and $272,740, respectively).............  $60,320,438       $61,498,319
                                                       ===========       ===========
</TABLE>
 
- ---------------------
* Class A, Class B and Class D shares were issued July 28, 1997.
 
        SEE NOTES TO FINANCIAL STATEMENTS
 
                                       18
<PAGE>   19
 
TCW/DW INCOME AND GROWTH FUND
 
NOTES TO FINANCIAL STATEMENTS July 31, 1998 (unaudited)
 
1. ORGANIZATIONAL AND ACCOUNTING POLICIES
 
TCW/DW Income and Growth Fund (the "Fund") is registered under the Investment
Company Act of 1940, as amended (the "Act"), as a non-diversified, open-end
management investment company. The Fund's investment objective is to generate
high total return by providing a high level of current income and the potential
for capital appreciation. The Fund seeks to achieve its objective by investing
in bonds or preferred stock convertible into common stock, other fixed income
securities, common stocks and U.S. Government securities. The Fund was organized
as a Massachusetts business trust on November 23, 1992 and commenced operations
on March 31, 1993. On July 28, 1997, the Fund commenced offering three
additional classes of shares, with the then current shares, other than shares
which were acquired in exchange for shares of Funds for which Morgan Stanley
Dean Witter Services Company Inc. serves as Manager and TCW Funds Management,
Inc. serves as Adviser ("TCW/DW Funds") offered with a contingent deferred sales
charge ("CDSC") and shares acquired through reinvestment of dividends and
distributions thereon, designated Class C shares. Shares held prior to July 28,
1997 which were acquired in exchange for shares of a TCW/DW Fund sold with a
CDSC, including shares acquired through reinvestment of dividends and
distributions thereon, have been designated Class B shares.
 
The Fund offers Class A shares, Class B shares, Class C shares and Class D
shares. The four classes are substantially the same except that most Class A
shares are subject to a sales charge imposed at the time of purchase, some Class
A shares, and most Class B shares and Class C shares are subject to a contingent
deferred sales charge imposed on shares redeemed within one year, six years and
one year, respectively. Class D shares are not subject to a sales charge.
Additionally, Class A shares, Class B shares and Class C shares incur
distribution expenses.
 
The preparation of financial statements in accordance with generally accepted
accounting principles requires management to make estimates and assumptions that
affect the reported amounts and disclosures. Actual results could differ from
those estimates.
 
The following is a summary of significant accounting policies:
 
A. VALUATION OF INVESTMENTS -- (1) an equity security listed or traded on the
New York, American or other domestic or foreign stock exchange is valued at its
latest sale price on that exchange prior to the time when assets are valued; if
there were no sales that day, the security is valued at the latest bid price (in
cases where securities are traded on more than one exchange, the securities are
valued on the exchange designated as the primary market pursuant to procedures
adopted by the Trustees);
 
                                       19
<PAGE>   20
 
TCW/DW INCOME AND GROWTH FUND
 
NOTES TO FINANCIAL STATEMENTS July 31, 1998 (unaudited) continued
 
(2) all other portfolio securities for which over-the-counter market quotations
are readily available are valued at the latest available bid price prior to the
time of valuation; (3) when market quotations are not readily available,
including circumstances under which it is determined by TCW Funds Management,
Inc. (the "Adviser") that sale or bid prices are not reflective of a security's
market value, portfolio securities are valued at their fair value as determined
in good faith under procedures established by and under the general supervision
of the Trustees (valuation of debt securities for which market quotations are
not readily available may be based upon current market prices of securities
which are comparable in coupon, rating and maturity or an appropriate matrix
utilizing similar factors); (4) certain portfolio securities may be valued by
an outside pricing service approved by the Trustees. The pricing service may
utilize a matrix system incorporating security quality, maturity and coupon as
the evaluation model parameters, and/or research and evaluations by its staff,
including review of broker-dealer market price quotations, if available, in
determining what it believes is the fair valuation of the securities valued by
such pricing service; (5) short-term debt securities having a maturity date of
more than sixty days at time of purchase are valued on a mark-to-market basis
until sixty days prior to maturity and thereafter at amortized cost based on
their value on the 61st day. Short-term debt securities having a maturity date
of sixty days or less at the time of purchase are valued at amortized cost.
 
B. ACCOUNTING FOR INVESTMENTS -- Security transactions are accounted for on the
trade date (date the order to buy or sell is executed). Realized gains and
losses on security transactions are determined by the identified cost method.
Discounts are accreted over the life of the respective securities. Dividend
income and other distributions are recorded on the ex-dividend date. Interest
income is accrued daily.
 
C. MULTIPLE CLASS ALLOCATIONS -- Investment income, expenses (other than
distribution fees), and realized and unrealized gains and losses are allocated
to each class of shares based upon the relative net asset value on the date such
items are recognized. Distribution fees are charged directly to the respective
class.
 
D. FEDERAL INCOME TAX STATUS -- It is the Fund's policy to comply with the
requirements of the Internal Revenue Code applicable to regulated investment
companies and to distribute all of its taxable income to its shareholders.
Accordingly, no federal income tax provision is required.
 
E. DIVIDENDS AND DISTRIBUTIONS TO SHAREHOLDERS -- The Fund records dividends and
distributions to its shareholders on the ex-dividend date. The amount of
dividends and distributions from net investment income and net realized capital
gains are determined in accordance with federal income tax regulations which may
differ from generally accepted accounting principles. These "book/tax"
differences are
 
                                       20
<PAGE>   21
 
TCW/DW INCOME AND GROWTH FUND
 
NOTES TO FINANCIAL STATEMENTS July 31, 1998 (unaudited) continued
 
either considered temporary or permanent in nature. To the extent these
differences are permanent in nature, such amounts are reclassified within the
capital accounts based on their federal tax-basis treatment; temporary
differences do not require reclassification. Dividends and distributions which
exceed net investment income and net realized capital gains for financial
reporting purposes but not for tax purposes are reported as dividends in excess
of net investment income or distributions in excess of net realized capital
gains. To the extent they exceed net investment income and net realized capital
gains for tax purposes, they are reported as distributions of paid-in-capital.
 
F. ORGANIZATIONAL EXPENSES -- Morgan Stanley Dean Witter Advisors Inc., formerly
Dean Witter InterCapital Inc., an affiliate of Morgan Stanley Dean Witter
Services Company Inc. (the "Manager") paid the organizational expenses of the
Fund in the amount of approximately $206,000 of which $200,000 have been
reimbursed. Such expenses were fully amortized as of March 30, 1998.
 
2. MANAGEMENT AGREEMENT
 
Pursuant to a Management Agreement, the Fund pays the Manager a management fee,
accrued daily and payable monthly, by applying the following annual rates to the
net assets of the Fund determined as of the close of each business day: 0.45% to
the portion of daily net assets not exceeding $500 million and 0.42% to the
portion of the daily net assets exceeding $500 million.
 
Under the terms of the Management Agreement, the Manager maintains certain of
the Fund's books and records and furnishes, at its own expense, office space,
facilities, equipment, clerical, bookkeeping and certain legal services and pays
the salaries of all personnel, including officers of the Fund who are employees
of the Manager. The Manager also bears the cost of telephone services, heat,
light, power and other utilities provided to the Fund.
 
3. INVESTMENT ADVISORY AGREEMENT
 
Pursuant to an Investment Advisory Agreement, the Fund pays the Adviser an
advisory fee, accrued daily and payable monthly, by applying the following
annual rates to the net assets of the Fund determined as of the close of each
business day: 0.30% to the portion of daily net assets not exceeding $500
million and 0.28% to the portion of the daily net assets exceeding $500 million.
 
Under the terms of the Investment Advisory Agreement, the Fund has retained the
Adviser to invest the Fund's assets, including placing orders for the purchase
and sale of portfolio securities. The
 
                                       21
<PAGE>   22
 
TCW/DW INCOME AND GROWTH FUND
 
NOTES TO FINANCIAL STATEMENTS July 31, 1998 (unaudited) continued
 
Adviser obtains and evaluates such information and advice relating to the
economy, securities markets, and specific securities as it considers necessary
or useful to continuously manage the assets of the Fund in a manner consistent
with its investment objective. In addition, the Adviser pays the salaries of all
personnel, including officers of the Fund, who are employees of the Adviser.
 
4. PLAN OF DISTRIBUTION
 
Shares of the Fund are distributed by Morgan Stanley Dean Witter Distributors
Inc. (the "Distributor"), an affiliate of the Manager. The Fund has adopted a
Plan of Distribution (the "Plan") pursuant to Rule 12b-1 under the Act. The Plan
provides that the Fund will pay the Distributor a fee which is accrued daily and
paid monthly at the following annual rates: (i) Class A -- up to 0.25% of the
average daily net assets of Class A; (ii) Class B -- 0.75% of the average daily
net assets of Class B, and (iii) Class C -- up to 0.75% of the average daily net
assets of Class C. In the case of Class A shares, amounts paid under the Plan
are paid to the Distributor for services provided. In the case of Class B and
Class C shares, amounts paid under the Plan are paid to the Distributor for
services provided and the expenses borne by it and others in the distribution of
the shares of these Classes, including the payment of commissions for sales of
these Classes and incentive compensation to, and expenses of, Morgan Stanley
Dean Witter Financial Advisors and others who engage in or support distribution
of the shares or who service shareholder accounts, including overhead and
telephone expenses; printing and distribution of prospectuses and reports used
in connection with the offering of these shares to other than current
shareholders; and the preparation, printing and distribution of sales literature
and advertising materials. In addition, the Distributor may utilize fees paid
pursuant to the Plan, in the case of Class B shares, to compensate Dean Witter
Reynolds Inc. ("DWR"), an affiliate of the Manager and Distributor, and other
selected broker-dealers for their opportunity costs in advancing such amounts,
which compensation would be in the form of a carrying charge on any unreimbursed
expenses.
 
In the case of Class B shares, provided that the Plan continues in effect, any
cumulative expenses incurred by the Distributor but not yet recovered may be
recovered through the payment of future distribution fees from the Fund pursuant
to the Plan and contingent deferred sales charges paid by investors upon
redemption of Class B shares. Although there is no legal obligation for the Fund
to pay expenses incurred in excess of payments made to the Distributor under the
Plan and the proceeds of contingent deferred sales charges paid by investors
upon redemption of shares, if for any reason the Plan is terminated, the
Trustees will consider at that time the manner in which to treat such expenses.
 
                                       22
<PAGE>   23
 
TCW/DW INCOME AND GROWTH FUND
 
NOTES TO FINANCIAL STATEMENTS July 31, 1998 (unaudited) continued
 
The Distributor has advised the Fund that such excess amounts, including
carrying charges, totaled $131,714 at July 31, 1998.
 
In the case of Class A shares and Class C shares, expenses incurred pursuant to
the Plan in any calendar year in excess of 0.25% or 0.75% of the average daily
net assets of Class A or Class C, respectively, will not be reimbursed by the
Fund through payments in any subsequent year, except that expenses representing
a gross sales credit to Morgan Stanley Dean Witter Financial Advisors or other
selected broker-dealer representatives may be reimbursed in the subsequent
calendar year. For the six months ended July 31, 1998, the distribution fee was
accrued for Class A shares and Class C shares at the annual rate of 0.19% and
0.73%, respectively.
 
The Distributor has informed the Fund that for the six months ended July 31,
1998, it received contingent deferred sales charges from certain redemptions of
the Fund's Class B shares and Class C shares of $23,479, and $2,205,
respectively and received $637 in front-end sales charges from sales of the
Fund's Class A shares. The respective shareholders pay such charges which are
not an expense of the Fund.
 
5. SECURITY TRANSACTIONS AND TRANSACTIONS WITH AFFILIATES
 
The cost of purchases and proceeds from sales of portfolio securities, excluding
short-term investments, for the six months ended July 31, 1998 aggregated
$38,745,006 and $33,697,396, respectively.
 
Included in the aforementioned sales of portfolio securities are sales of Morgan
Stanley Group Inc., an affiliate of the Manager, of $57,813, as well as realized
gain of $2,625. The Fund's interest and dividend income included $2,585 and
$13,167, respectively, from Morgan Stanley Group, Inc. securities.
 
Morgan Stanley Dean Witter Trust FSB, an affiliate of the Manager and
Distributor, is the Fund's transfer agent.
 
                                       23
<PAGE>   24
 
TCW/DW INCOME AND GROWTH FUND
 
NOTES TO FINANCIAL STATEMENTS July 31, 1998 (unaudited) continued
 
6. SHARES OF BENEFICIAL INTEREST
 
Transactions in shares of beneficial interest were as follows:
 
<TABLE>
<CAPTION>
                                                                   FOR THE SIX                   FOR THE YEAR
                                                                   MONTHS ENDED                      ENDED
                                                                  JULY 31, 1998               JANUARY 31, 1998+*
                                                              ----------------------       -------------------------
                                                                   (unaudited)
                                                               SHARES      AMOUNT            SHARES        AMOUNT
                                                              --------   -----------       ----------   ------------
<S>                                                           <C>        <C>               <C>          <C>
CLASS A SHARES
Sold........................................................     4,891   $    58,330            2,751   $     33,065
Reinvestment of dividends and distributions.................       190         2,198              142          1,614
Redeemed....................................................    (2,005)      (23,937)            (492)        (5,989)
                                                              --------   -----------       ----------   ------------
Net increase - Class A......................................     3,076        36,591            2,401         28,690
                                                              --------   -----------       ----------   ------------
CLASS B SHARES
Sold........................................................   253,687     3,019,869          209,588      2,492,309
Reinvestment of dividends and distributions.................    21,281       247,761           32,187        368,173
Redeemed....................................................  (157,093)   (1,861,851)         (89,344)    (1,054,299)
                                                              --------   -----------       ----------   ------------
Net increase - Class B......................................   117,875     1,405,779          152,431      1,806,183
                                                              --------   -----------       ----------   ------------
CLASS C SHARES
Sold........................................................   199,227     2,368,848          912,536     10,493,055
Reinvestment of dividends and distributions.................   156,431     1,825,107          485,664      5,548,520
Redeemed....................................................  (533,009)   (6,337,618)      (1,590,764)   (18,344,299)
                                                              --------   -----------       ----------   ------------
Net decrease - Class C......................................  (177,351)   (2,143,663)        (192,564)    (2,302,724)
                                                              --------   -----------       ----------   ------------
CLASS D SHARES
Sold........................................................        --            --              848         10,014
Reinvestment of dividends and distributions.................        41           476               68            781
                                                              --------   -----------       ----------   ------------
Net increase - Class D......................................        41           476              916         10,795
                                                              --------   -----------       ----------   ------------
Net decrease in Fund........................................   (56,359)  $  (700,817)         (36,816)  $   (457,056)
                                                              ========   ===========       ==========   ============
</TABLE>
 
- ---------------------
+ On July 28, 1997, 416,258, shares representing $4,916,004 were transferred to
  Class B.
 
* For Class A, B and D shares, for the period July 28, 1997 (issue date) through
  January 31, 1998.
 
                                       24
<PAGE>   25
 
TCW/DW INCOME AND GROWTH FUND
 
FINANCIAL HIGHLIGHTS
 
Selected ratios and per share data for a share of beneficial interest
outstanding throughout each period:
 
<TABLE>
<CAPTION>
                                                                                                                  FOR THE PERIOD
                                                   FOR THE SIX          FOR THE YEAR ENDED JANUARY 31,           MARCH 31, 1993*
                                                  MONTHS ENDED      --------------------------------------           THROUGH
                                                 JULY 31, 1998++    1998**++    1997      1996      1995         JANUARY 31, 1994
- ---------------------------------------------------------------------------------------------------------------------------------
                                                   (unaudited)
<S>                                              <C>                <C>        <C>       <C>       <C>           <C>
CLASS C SHARES
 
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period...........        $11.61        $11.42     $11.13    $ 9.77    $10.98            $10.00
                                                       ------        ------     ------    ------    ------            ------
Net investment income..........................          0.27          0.57       0.60      0.59      0.59              0.45
Net realized and unrealized gain (loss)........          0.10          0.96       0.84      1.37     (1.20)             1.02
                                                       ------        ------     ------    ------    ------            ------
Total from investment operations...............          0.37          1.53       1.44      1.96     (0.61)             1.47
                                                       ------        ------     ------    ------    ------            ------
Less dividends and distributions from:
 Net investment income.........................         (0.26)        (0.60)     (0.60)    (0.60)    (0.55)            (0.39)
 Net realized gain.............................         (0.21)        (0.74)     (0.55)       --     (0.05)            (0.10)
                                                       ------        ------     ------    ------    ------            ------
Total dividends and distributions..............         (0.47)        (1.34)     (1.15)    (0.60)    (0.60)            (0.49)
                                                       ------        ------     ------    ------    ------            ------
Net asset value, end of period.................        $11.51        $11.61     $11.42    $11.13    $ 9.77            $10.98
                                                       ======        ======     ======    ======    ======            ======
TOTAL INVESTMENT RETURN+.......................          3.18%(1)     14.03%     13.46%    20.52%    (5.59)%           15.06%(1)
 
RATIOS TO AVERAGE NET ASSETS:
Expenses.......................................          2.10%(2)      2.01%      2.02%     2.21%     2.04%             1.57%(2)(3)
Net investment income..........................          4.50%(2)      4.84%      5.19%     5.41%     5.83%             5.62%(2)(3)
 
SUPPLEMENTAL DATA:
Net assets, end of period, in thousands........       $52,352       $54,863    $60,941   $57,631   $55,335           $64,370
Portfolio turnover rate........................            58%(1)        96%       102%       79%       88%               84%(1)
</TABLE>
 
- ---------------------
 *  Commencement of operations.
 ** Prior to July 28, 1997, the Fund issued one class of shares. All shares of
    the Fund held prior to that date, other than shares which were acquired in
    exchange for shares of Funds for which Morgan Stanley Dean Witter Services
    Company Inc. serves as Manager and TCW Funds Management, Inc. serves as
    Adviser ("TCW/DW Funds") offered with a contingent deferred sales charge
    ("CDSC") and shares acquired through reinvestment of dividends and
    distributions thereon, have been designated Class C shares. Shares held
    prior to July 28, 1997 which were acquired in exchange for shares of a
    TCW/DW Fund sold with a CDSC, including shares acquired through reinvestment
    of dividends and distributions thereon, have been designated Class B shares.
++  The per share amounts were computed using an average number of shares
    outstanding during the period.
 +  Does not reflect the deduction of sales charge. Calculated based on the net
    asset value as of the last business day of the period.
(1) Not annualized.
(2) Annualized.
(3) If the Manager and Investment Adviser had not reimbursed all expenses and
    waived the management fee, the above annualized expense and net investment
    income ratios would have been 2.00% and 5.18%, respectively.
 
                       SEE NOTES TO FINANCIAL STATEMENTS
 
                                       25
<PAGE>   26
 
TCW/DW INCOME AND GROWTH FUND
 
FINANCIAL HIGHLIGHTS, continued
 
<TABLE>
<CAPTION>
                                                                                  FOR THE PERIOD
                                                                FOR THE SIX       JULY 28, 1997*
                                                               MONTHS ENDED          THROUGH
                                                              JULY 31, 1998++   JANUARY 31, 1998++
- --------------------------------------------------------------------------------------------------
                                                                (unaudited)
<S>                                                           <C>               <C>
CLASS A SHARES
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period........................      $11.60              $11.81
                                                                  ------              ------
Net investment income.......................................        0.30                0.30
Net realized and unrealized gain............................        0.11                0.39
                                                                  ------              ------
Total from investment operations............................        0.41                0.69
                                                                  ------              ------
Less dividends and distributions from:
 Net investment income......................................       (0.30)              (0.33)
 Net realized gain..........................................       (0.21)              (0.57)
                                                                  ------              ------
Total dividends and distributions...........................       (0.51)              (0.90)
                                                                  ------              ------
Net asset value, end of period..............................      $11.50              $11.60
                                                                  ======              ======
TOTAL INVESTMENT RETURN+....................................        3.50%(1)            6.03%(1)
RATIOS TO AVERAGE NET ASSETS:
Expenses....................................................        1.58%(2)            1.54%(2)
Net investment income.......................................        5.11%(2)            5.04%(2)
SUPPLEMENTAL DATA:
Net assets, end of period, in thousands.....................         $63                 $28
Portfolio turnover rate.....................................          58%(1)              96%
 
CLASS B SHARES
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period........................      $11.60              $11.81
                                                                  ------              ------
Net investment income.......................................        0.27                0.28
Net realized and unrealized gain............................        0.10                0.38
                                                                  ------              ------
Total from investment operations............................        0.37                0.66
                                                                  ------              ------
Less dividends and distributions from:
 Net investment income......................................       (0.26)              (0.30)
 Net realized gain..........................................       (0.21)              (0.57)
                                                                  ------              ------
Total dividends and distributions...........................       (0.47)              (0.87)
                                                                  ------              ------
Net asset value, end of period..............................      $11.50              $11.60
                                                                  ======              ======
TOTAL INVESTMENT RETURN+....................................        3.19%(1)            5.80%(1)
RATIOS TO AVERAGE NET ASSETS:
Expenses....................................................        2.12%(2)            2.02%(2)
Net investment income.......................................        4.50%(2)            4.58%(2)
SUPPLEMENTAL DATA:
Net assets, end of period, in thousands.....................      $7,894              $6,597
Portfolio turnover rate.....................................          58%(1)              96%
</TABLE>
 
- ---------------------
 *  The date the shares were first issued. Class B participants who held shares
    prior to July 28, 1997 should refer to the Financial Highlights of Class C
    to obtain the historical per share data and ratio information of their
    shares.
 ++ The per share amounts were computed using an average number of shares
    outstanding during the period.
 +  Does not reflect the deduction of sales charge. Calculated based on the net
    asset value as of the last business day of the period.
(1) Not annualized.
(2) Annualized.
 
                       SEE NOTES TO FINANCIAL STATEMENTS
 
                                       26
<PAGE>   27
 
TCW/DW INCOME AND GROWTH FUND
 
FINANCIAL HIGHLIGHTS, continued
 
<TABLE>
<CAPTION>
                                                                                 FOR THE PERIOD
                                                               FOR THE SIX       JULY 28, 1997*
                                                               MONTHS ENDED         THROUGH
                                                              JULY 31, 1998    JANUARY 31, 1998++
- -------------------------------------------------------------------------------------------------
                                                               (unaudited)
<S>                                                           <C>              <C>
 
CLASS D SHARES
 
PER SHARE OPERATING PERFORMANCE:
 
Net asset value, beginning of period........................      $11.61             $11.81
                                                                  ------             ------
 
Net investment income.......................................        0.31               0.32
 
Net realized and unrealized gain............................        0.10               0.39
                                                                  ------             ------
 
Total from investment operations............................        0.41               0.71
                                                                  ------             ------
 
Less dividends and distributions from:
 Net investment income......................................       (0.30)             (0.34)
 Net realized gain..........................................       (0.21)             (0.57)
                                                                  ------             ------
 
Total dividends and distributions...........................       (0.51)             (0.91)
                                                                  ------             ------
 
Net asset value, end of period..............................      $11.51             $11.61
                                                                  ======             ======
 
TOTAL INVESTMENT RETURN+....................................        3.56%(1)           6.21%(1)
 
RATIOS TO AVERAGE NET ASSETS:
Expenses....................................................        1.37%(2)           1.27%(2)
 
Net investment income.......................................        5.24%(2)           5.33%(2)
 
SUPPLEMENTAL DATA:
Net assets, end of period, in thousands.....................         $11                $11
 
Portfolio turnover rate.....................................          58%(1)             96%
</TABLE>
 
- ---------------------
 *  The date the shares were first issued.
 ++ The per share amounts were computed using an average number of shares
    outstanding during the period.
 +  Calculated based on the net asset value as of the last business day of the
    period.
(1) Not annualized.
(2) Annualized.
 
                       SEE NOTES TO FINANCIAL STATEMENTS
 
                                       27
<PAGE>   28
TRUSTEES
John C. Argue
Richard M. DeMartini
Charles A. Fiumefreddo
John R. Haire
Dr. Manuel H. Johnson
Thomas E. Larkin, Jr.
Michael E. Nugent
John L. Schroeder
Marc I. Stern

OFFICERS
Charles A. Fiumefreddo
Chairman and Chief Executive Officer

Thomas E. Larkin, Jr.
President

Barry Fink
Vice President, Secretary and 
General Counsel

Robert M. Hanisee
Vice President

Kevin A. Hunter
Vice President

Mark L. Attanasio
Vice President

Melissa V. Weiler
Vice President

Thomas F. Caloia
Treasurer

TRANSFER AGENT
Morgan Stanley Dean Witter Trust FSB
Harborside Financial Center - Plaza Two
Jersey City, New Jersey 07311

INDEPENDENT ACCOUNTANTS
PriceWaterhouseCoopers LLP
1177 Avenue of the Americas
New York, New York 10036

MANAGER
Morgan Stanley Dean Witter Services Company Inc.

ADVISER
TCW Funds Management, Inc.

The financial statements included herein have been taken from the records of
the Fund without examination by the independent accountants and accordingly
they do not express an opinion thereon.

This report is submitted for the general information of shareholders of the
Fund. For more detailed information about the Fund, its officers and
trustees, fees, expenses and other pertinent information, please see the
prospectus of the Fund.

This report is not authorized for distribution to prospective investors in the
Fund unless preceded or accompanied by an effective prospectus.


TCW/DW

INCOME AND
GROWTH FUND

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Semiannual Report
July 31, 1998


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