WITTER DEAN HIGH YIELD SECURITIES INC
N-30D, 1998-04-29
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<PAGE>

                              Two World Trade Center, New York, New York 10048 

DEAN WITTER HIGH YIELD SECURITIES INC. 
LETTER TO THE SHAREHOLDERS February 28, 1998 

DEAR SHAREHOLDER: 

Continuing the trend of recent years, high-yield bonds remained one of the 
better-performing sectors of the fixed-income market for the calendar year 
1997. Benefiting from a healthy economy, improved credit quality and a 
relatively favorable interest-rate environment, the high-yield market posted 
a strong double-digit return for the year. 

Reviewing the past six-month period, despite some market weakness in October 
and November, as a result of the foreign market crisis, the sector finished 
on a high note. Continued strength in the economy has resulted in solid 
earnings improvements on the part of many high-yield companies and has 
provided the fuel for the sharp equity market advance experienced during the 
period. Many high-yield companies have taken advantage of higher equity 
valuations to raise equity and strengthen their own balance sheets. The 
resulting credit quality improvement has helped keep the high-yield market's 
performance strong relative to that of many of the other fixed-income 
markets. 

PERFORMANCE AND PORTFOLIO STRATEGY 

For the six-month period ended February 28, 1998, the Fund's Class A, B, C 
and D shares had total returns of 5.08 percent, 4.54 percent, 4.62 percent 
and 5.19 percent, respectively versus 6.44 percent and 6.86 percent for the 
Lehman High Yield Index and the Lipper High Yield Bond Fund Index. 
Performance of the Fund's four share classes varies because of differing 
sales charges and expenses. On February 28, 1998, the Fund's net assets 
exceeded $2.2 billion. 

As the economy has continued to expand over the past few years, the Fund has 
tended to concentrate on B-rated issues. In a growing economy one can 
generally find undervalued, upgrade candidates in this sector of the market 
that provide attractive yields as well as appreciation potential. Given our 
expectation for continued growth in the economy this year, we feel that many 
of these issues remain very attractive investments. However, in light of the 
lower market yields available today and the 

<PAGE>
DEAN WITTER HIGH YIELD SECURITIES INC. 
LETTER TO THE SHAREHOLDERS February 28, 1998, continued 

potential for a modest correction in the market, we have taken some defensive 
steps for the portfolio over the past year. This includes increasing our 
allocation to the higher-quality end of the market (BB-rated issues or 
higher). We feel that these holdings may better protect shareholders during a 
potentially nervous market environment, as well as provide the portfolio 
flexibility to take advantage of higher, more attractive market yields in the 
future. In addition, the Fund has sold many of its heavily cyclical positions 
and is now focused mainly on more predictable, recession-resistant and growth 
sectors of the economy, such as food/beverage, health care, 
telecommunications, media and cable. In some of these sectors, such as media 
and telecommunications, we expect to see continued consolidation, which may 
bode well for many of the Fund's individual holdings. Finally, in keeping 
with our more conservative posture, we continue to limit our exposure to the 
foreign high-yield markets, given the potential risk associated with the 
ongoing foreign market crisis. 

LOOKING AHEAD 

The one-to two-year outlook for the high-yield market remains favorable, with 
our expectations for continued economic growth. We caution, however, that 
during this period the possibility exists for another round of investor 
nervousness in reaction to potential Federal Reserve Board moves or another 
disruption in the foreign markets. 

We thank you for your continued support of Dean Witter High Yield Securities 
and look forward to continuing to serve your investment needs. 

Very truly yours, 

/s/ Charles A. Fiumefreddo 
CHARLES A. FIUMEFREDDO 
Chairman of the Board 

<PAGE>
DEAN WITTER HIGH YIELD SECURITIES INC. 
PORTFOLIO OF INVESTMENTS February 28, 1998 (unaudited) 

<TABLE>
<CAPTION>
  PRINCIPAL 
  AMOUNT IN                                                                    COUPON      MATURITY 
  THOUSANDS                                                                     RATE         DATE         VALUE 
- ----------------------------------------------------------------------------------------------------------------- 
<S>           <C>                                                              <C>        <C>        <C>
              CORPORATE BONDS (93.5%) 
              Aerospace (0.6%) 
   $13,000    Sabreliner Corp. (Series B) .................................    12.50 %    04/15/03   $  13,715,000 
                                                                                                     -------------- 

              Automotive (3.4%) 
    30,000    General Motors Acceptance Corp. .............................    15.00      03/17/98      30,096,900 
    43,700    Toyota Motor Credit Corp. ...................................    15.00      09/25/98      45,927,389 
                                                                                                     -------------- 
                                                                                                        76,024,289 
                                                                                                     -------------- 
              Broadcast Media (6.9%) 
    13,350    Adams Outdoor Advertising L.P. ..............................    10.75      03/15/06      14,818,500 
    33,500    Australis Holdings Ltd. (Australia) .........................    15.00 ++   11/01/02      15,075,000 
     4,404    Australis Media Ltd. -144A* (Australia) .....................     0.00      11/01/00       2,950,688 
    15,000    Capstar Broadcasting Partners ...............................    12.75 ++   02/01/09      11,212,500 
    19,950    Echostar DBS Corp. ..........................................    12.50      07/01/02      22,144,500 
    15,500    Paxson Communications Corp. .................................    11.625     10/01/02      16,836,875 
    20,749    Spanish Broadcasting System, Inc. ...........................    12.50      06/15/02      23,861,350 
    14,000    STC Broadcasting, Inc. ......................................    11.00      03/15/07      15,470,000 
    44,865    TCI Satellite Entertainment Corp. -144A*.....................    12.25 ++   02/15/07      31,854,150 
                                                                                                     -------------- 
                                                                                                       154,223,563 
                                                                                                     -------------- 
              Business Services (4.4%) 
    28,000    Anacomp, Inc. (Series B) ....................................    10.875     04/01/04      29,680,000 
    13,000    Comforce Operating Inc. .....................................    12.00      12/01/07      13,910,000 
    42,700    Xerox Credit Corp. ..........................................    15.00      06/26/98      43,904,567 
    11,700    Xerox Credit Corp. ..........................................    15.00      10/07/98      12,327,003 
                                                                                                     -------------- 
                                                                                                        99,821,570 
                                                                                                     -------------- 
              Cable & Telecommunications (18.3%) 
    20,000    21st Century Telecom Group -144A* ...........................    12.25 ++   02/15/08      10,800,000 
    15,700    Adelphia Communications, Inc. (Series B) ....................     9.875     03/01/07      17,113,000 
    13,500    Advanced Radio Telecommunication (Units)++ ..................    14.00      02/15/07      14,647,500 
    32,625    American Communications Services, Inc. ......................    13.75      07/15/07      39,313,125 
    16,099    Cablevision Systems Corp. ...................................     9.875     04/01/23      17,708,900 
    14,750    Charter Communication South East L.P. (Series B) ............    11.25      03/15/06      16,556,875 
    20,031    Clearnet Communications Inc. (Canada) .......................    14.75 ++   12/15/05      16,225,110 
    24,060    Falcon Holdings Group L.P. (Series B) .......................    11.00 +    09/15/03      25,593,653 
    19,000    FrontierVision Operating Partners, L.P. .....................    11.00      10/15/06      21,090,000 
    10,800    Globalstar L.P./Capital Corp. ...............................    10.75      11/01/04      10,881,000 
    14,900    GST Equipment Funding, Inc. .................................    13.25      05/01/07      17,433,000 
    13,800    Hyperion Telecommunication, Inc. 
               (Series A)  ................................................    13.00 ++   04/15/03      10,315,500 

                      SEE NOTES TO FINANCIAL STATEMENTS 

<PAGE>
DEAN WITTER HIGH YIELD SECURITIES INC. 
PORTFOLIO OF INVESTMENTS February 28, 1998 (unaudited) continued 

  PRINCIPAL 
  AMOUNT IN                                                                    COUPON      MATURITY 
  THOUSANDS                                                                     RATE         DATE         VALUE 
 ----------------------------------------------------------------------------------------------------------------- 
   $23,000    Hyperion Telecommunication, Inc. 
               (Series B)  ................................................    12.25 %    09/01/04   $  25,990,000 
    56,800    In-Flight Phone Corp. (Series B)(a) .........................    14.00 ++   05/15/02       7,952,000 
    14,000    IXC Communications, Inc. (Series B) .........................    12.50      10/01/05      16,205,000 
    10,000    James Cable Partners L.P. ...................................    10.75      08/15/04      10,650,000 
    20,000    Nextel Communications, Inc. .................................    10.65 ++   09/15/07      12,950,000 
     8,500    NextLink Communications, Inc. ...............................    12.50      04/15/06       9,732,500 
    19,750    Paging Network, Inc. ........................................    10.125     08/01/07      20,540,000 
     5,000    Paging Network, Inc. ........................................    10.00      10/15/08       5,187,500 
    15,050    Peoples Telephone Co., Inc. .................................    12.25      07/15/02      15,990,625 
    16,000    Rifkin Acquisition Partners L.P. ............................    11.125     01/15/06      17,720,000 
    11,000    Talton Holdings, Inc. -144A* ................................    11.00      06/30/07      12,210,000 
    20,230    USA Mobile Communications 
               Holdings, Inc.  ............................................     9.50      02/01/04      19,623,100 
    22,000    Winstar Communications, Inc. ................................    14.00 ++   10/15/05      18,150,000 
                                                                                                     -------------- 
                                                                                                       410,578,388 
                                                                                                     -------------- 
              Chemicals (1.2%) 
    25,645    Harris Chemical North America, Inc. .........................    10.75      10/15/03      27,183,700 
                                                                                                     -------------- 
              Computer Equipment (3.5%) 
    46,700    IBM Credit Corp. ............................................    15.00      02/02/99      50,516,324 
     8,175    Unisys Corp. ................................................    11.75      10/15/04       9,503,437 
    17,500    Unisys Corp. ................................................    12.00      04/15/03      19,906,250 
                                                                                                     -------------- 
                                                                                                        79,926,011 
                                                                                                     -------------- 
              Computers (0.5%) 
    10,000    Advanced Micro Devices, Inc. ................................    11.00      08/01/03      10,900,000 
                                                                                                     -------------- 
              Consumer Products (1.2%) 
    11,000    J.B Williams Holdings, Inc. .................................    12.00      03/01/04      11,495,000 
    30,000    Renaissance Cosmetics, Inc. .................................    11.75      02/15/04      15,300,000 
                                                                                                     -------------- 
                                                                                                        26,795,000 
                                                                                                     -------------- 
              Containers (1.2%) 
    12,500    Mail-Well Corp. .............................................    10.50      02/15/04      13,468,750 
    14,725    Packaging Resources, Inc. ...................................    11.625     05/01/03      14,430,500 
                                                                                                     -------------- 
                                                                                                        27,899,250 
                                                                                                     -------------- 
              Drug Stores (0.5%) 
    10,000    Community Distributors -144A* ...............................    10.25      10/15/04      10,300,000 
                                                                                                     -------------- 

              Electrical & Alarm Systems (0.8%) 
    22,000    Mosler, Inc. ................................................    11.00      04/15/03      18,920,000 
                                                                                                     -------------- 

                      SEE NOTES TO FINANCIAL STATEMENTS 

<PAGE>
DEAN WITTER HIGH YIELD SECURITIES INC. 
PORTFOLIO OF INVESTMENTS February 28, 1998 (unaudited) continued 

  PRINCIPAL 
  AMOUNT IN                                                                    COUPON      MATURITY 
  THOUSANDS                                                                     RATE         DATE         VALUE 
 ----------------------------------------------------------------------------------------------------------------- 
              Entertainment/Gaming & Lodging (10.7%) 
  $ 13,850    AMF Group Inc. (Series B) ...................................    10.875%    03/15/06   $  15,217,687 
    20,500    Fitzgerald Gaming Corp. -144A* ..............................    12.25      12/15/04      21,012,500 
     7,000    Horseshoe Gaming L.L.C. (Series B) ..........................    12.75      09/30/00       7,787,500 
    25,500    Lady Luck Gaming Finance Corp. ..............................    11.875     03/01/01      26,328,750 
    16,000    Motels of America, Inc. (Series B) ..........................    12.00      04/15/04      15,600,000 
    13,925    Players International, Inc. .................................    10.875     04/15/05      15,317,500 
    15,900    Plitt Theaters, Inc. (Canada) ...............................    10.875     06/15/04      17,410,500 
    10,000    Resort At Summerlin -144A* ..................................    13.00 +    12/15/07      10,262,500 
    17,000    Riviera Holdings Corp. ......................................    10.00      08/15/04      17,467,500 
    14,100    Station Casinos, Inc. .......................................     9.625     06/01/03      14,664,000 
    13,500    Station Casinos, Inc. .......................................    10.125     03/15/06      15,120,000 
    19,750    Stuart Entertainment, Inc. (Series B) .......................    12.50      11/15/04      14,121,250 
    47,300    Walt Disney Co. .............................................    15.00      12/14/98      50,682,896 
                                                                                                     -------------- 
                                                                                                       240,992,583 
                                                                                                     -------------- 
              Finance (6.5%) 
    45,000    Commercial Credit Co. .......................................    15.00      07/10/98      46,456,650 
    50,750    General Electric Capital Corp. ..............................    15.00      01/21/99      54,793,760 
    43,700    Household Finance Corp. .....................................    15.00      09/25/98      45,865,335 
                                                                                                     -------------- 
                                                                                                       147,115,745 
                                                                                                     -------------- 
              Foods & Beverages (9.8%) 
    27,081    Envirodyne Industries, Inc. .................................    10.25      12/01/01      27,081,000 
     3,500    Fleming Companies, Inc. .....................................    10.50      12/01/04       3,714,375 
    15,221    Fleming Companies, Inc. .....................................    10.625     12/15/01      16,248,417 
     3,500    Fleming Companies, Inc. .....................................    10.625     07/31/07       3,731,875 
    51,500    General Mills, Inc. .........................................    15.00      01/29/99      55,767,805 
    54,250    PepsiCo, Inc. ...............................................    15.00      08/06/98      56,373,888 
    10,000    Sparkling Spring Water -144A* (Canada) ......................    11.50      11/15/07      10,800,000 
   105,075    Specialty Foods Acquisition Corp. 
               (Series B)  ................................................    13.00 ++   08/15/05      46,233,000 
                                                                                                     -------------- 
                                                                                                       219,950,360 
                                                                                                     -------------- 
              Healthcare (1.6%) 
    16,975    Unilab Corp. ................................................    11.00      04/01/06      17,993,500 
    16,500    Unison Healthcare Corp. -144A* ..............................    12.25      11/01/06       9,735,000 
     7,000    Universal Hospital Services, Inc. -144A* ....................    10.25      03/01/08       7,070,000 
                                                                                                     -------------- 
                                                                                                        34,798,500 
                                                                                                     -------------- 

                      SEE NOTES TO FINANCIAL STATEMENTS 

<PAGE>
DEAN WITTER HIGH YIELD SECURITIES INC. 
PORTFOLIO OF INVESTMENTS February 28, 1998 (unaudited) continued 

  PRINCIPAL 
  AMOUNT IN                                                                    COUPON      MATURITY 
  THOUSANDS                                                                     RATE         DATE         VALUE 
 ----------------------------------------------------------------------------------------------------------------- 
              Manufacturing (2.9%) 
  $ 11,900    Berry Plastics Corp. ........................................    12.25 %    04/15/04   $  13,090,000 
     9,075    Cabot Safety Corp. ..........................................    12.50      07/15/05      10,186,688 
    15,500    International Wire Group, Inc. ..............................    11.75      06/01/05      17,224,375 
    10,500    Outsourcing Services Group, Inc. -144A* .....................    10.875     03/01/06      10,710,000 
    12,230    Uniroyal Technology Corp. ...................................    11.75      06/01/03      12,841,500 
                                                                                                     -------------- 
                                                                                                        64,052,563 
                                                                                                     -------------- 
              Manufacturing -Diversified (5.6%) 
     7,500    Eagle Picher Industries, Inc. -144A* ........................     9.375     03/01/08       7,537,500 
    10,000    High Voltage Engineering, Inc. ..............................    10.50      08/15/04      10,600,000 
    15,870    Interlake Corp. .............................................    12.00      11/15/01      17,615,700 
    18,400    Interlake Corp. .............................................    12.125     03/01/02      19,044,000 
    13,350    J.B. Poindexter & Co., Inc. .................................    12.50      05/15/04      13,149,750 
    20,000    Jordan Industries, Inc. (Series B) ..........................    10.375     08/01/07      20,800,000 
    57,338    Jordan Industries, Inc. (Series B) ..........................    11.75 ++   04/01/09      36,696,320 
                                                                                                     -------------- 
                                                                                                       125,443,270 
                                                                                                     -------------- 
              Oil & Gas (3.1%) 
    16,000    Petro Stopping Centers L.P. .................................    10.50      02/01/07      17,120,000 
    49,700    Texaco Capital LLC ..........................................    15.00      01/13/99      53,540,816 
                                                                                                     -------------- 
                                                                                                        70,660,816 
                                                                                                     -------------- 
              Publishing (2.1%) 
    14,950    American Media Operations, Inc. .............................    11.625     11/15/04      16,220,750 
     7,500    MDC Communications Corp. ....................................    10.50      12/01/06       8,100,000 
     7,500    Perry-Judds -144A* ..........................................    10.625     12/15/07       7,875,000 
    14,100    United States Banknote Corp. ................................    10.375     06/01/02      14,223,375 
                                                                                                     -------------- 
                                                                                                        46,419,125 
                                                                                                     -------------- 
              Restaurants (4.9%) 
              American Restaurant Group Holdings, 
   141,992     Inc. -144A* (d)  ...........................................     0.00      12/15/05      26,978,480 
     6,000    Ameriking, Inc. .............................................    10.75      12/01/06       6,390,000 
    16,621    Carrols Corp. ...............................................    11.50      08/15/03      17,618,260 
    34,207    FRD Acquisition Corp. (Series B) ............................    12.50      07/15/04      37,969,770 
    15,500    Friendly Ice Cream Corp. ....................................    10.50      12/01/07      16,430,000 
     5,000    Perkins Family Restaurants, L.P. -144A* .....................    10.125     12/15/07       5,162,500 
                                                                                                     -------------- 
                                                                                                       110,549,010 
                                                                                                     -------------- 
              Retail -Food Chains (2.5%) 
     9,185    Eagle Food Centers, Inc. ....................................     8.625     04/15/00       9,024,263 
    10,000    Mrs. Fields Original -144A* .................................    10.125     12/01/04      10,075,000 
    15,000    Pantry, Inc. -144A* .........................................    10.25      10/15/07      15,637,500 
     8,748    Pueblo Xtra International, Inc. (Series C) ..................     9.50      08/01/03       8,223,120 
    14,500    Pueblo Xtra International, Inc. .............................     9.50      08/01/03      13,630,000 
                                                                                                     -------------- 
                                                                                                        56,589,883 
                                                                                                     -------------- 

                      SEE NOTES TO FINANCIAL STATEMENTS 

<PAGE>
DEAN WITTER HIGH YIELD SECURITIES INC. 
PORTFOLIO OF INVESTMENTS February 28, 1998 (unaudited) continued 

  PRINCIPAL 
  AMOUNT IN                                                                    COUPON      MATURITY 
  THOUSANDS                                                                     RATE         DATE         VALUE 
 ----------------------------------------------------------------------------------------------------------------- 
              Textiles (0.5%) 
   $23,517    U.S. Leather, Inc. (b) ......................................    10.25%     07/31/03   $   11,288,160 
                                                                                                     -------------- 
              Transportation (0.8%) 
    17,500    Alpha Shipping PLC -144A* (United Kingdom) ..................     9.50      02/15/08       17,193,750 
                                                                                                     -------------- 
              TOTAL CORPORATE BONDS 
               (Identified Cost $2,113,979,835)  ...................................................  2,101,340,536 
                                                                                                     -------------- 

</TABLE>

<TABLE>
<CAPTION>
 NUMBER OF 
   SHARES 
- ----------- 
<S>          <C>                                                               <C>
             COMMON STOCKS (c)(0.8%) 
             Automotive (0.0%) 
       709   Northern Holdings Industrial Corp. (d)*  ........................       -- 
                                                                               ------------- 
             Entertainment/Gaming & Lodging (0.0%) 
     7,500   Motels of America, Inc. -144A*  .................................      375,000 
   781,421   Vagabond Inns, Inc. (Class D)(a)  ...............................          781 
                                                                               ------------- 
                                                                                    375,781 
                                                                               ------------- 
             Foods & Beverages (0.0%) 
   574,725   Specialty Foods Acquisition Corp. -144A*  .......................      574,725 
                                                                               ------------- 
             Healthcare (0.2%) 
 1,358,200   Unilab Corp.  ...................................................    3,735,050 
                                                                               ------------- 
             Restaurants (0.0%) 
    38,057   American Restaurant Group Holdings, Inc. -144A*  ................          381 
                                                                               ------------- 
             Retail (0.6%) 
 2,779,700   County Seat Store Corp. (d)(e)  .................................   14,073,622 
                                                                               ------------- 
             Textiles (0.0%) 
    12,000   JPS Textiles Group, Inc. (Class A)  .............................          120 
                                                                               ------------- 
             TOTAL COMMON STOCKS 
             (Identified Cost $79,138,173)  ..................................   18,759,679 
                                                                               ------------- 
             PREFERRED STOCK (0.2%) 
             Restaurants (0.2%) 
     3,500   American Restaurant Group Holdings, Inc. -144A* (Units)++ 
               (Identified Cost $3,500,000)  ...................................  3,552,500 
                                                                               ------------- 
</TABLE>

                      SEE NOTES TO FINANCIAL STATEMENTS 

<PAGE>
DEAN WITTER HIGH YIELD SECURITIES INC. 
PORTFOLIO OF INVESTMENTS February 28, 1998 (unaudited) continued 

<TABLE>
<CAPTION>
 NUMBER OF                                                                     EXPIRATION 
  WARRANTS                                                                        DATE            VALUE 
- ------------------------------------------------------------------------------------------------------------ 
<S>          <C>                                                                <C>         <C>
             WARRANTS (c)(0.1%) 
             Aerospace (0.0%) 
     9,000   Sabreliner Corp. -144A*  ........................................  04/15/03       $   90,000 
                                                                                            ---------------- 
             Broadcast Media (0.0%) 
    32,500   Australis Holdings Ltd. -144A* (Australia)  .....................  10/30/01              325 
                                                                                            ---------------- 
             Cable & Telecommunications (0.1%) 
    35,000   Hyperion Telecommunication, Inc. -144A*  ........................  04/01/01        2,975,000 
                                                                                            ---------------- 
             Containers (0.0%) 
    10,000   Crown Packaging Holdings, Ltd. -144A*  ..........................  11/01/03              100 
                                                                                            ---------------- 
             Entertainment/Gaming & Lodging (0.0%) 
     5,000   Boomtown, Inc. -144A*  ..........................................  11/01/98           -- 
   207,312   Fitzgeralds Gaming Corp.  .......................................  12/19/98          932,904 
     7,000   Fitzgeralds South Inc. -144A*  ..................................  03/15/99           -- 
    10,000   Resort At Summerlin -144A*  .....................................  12/15/07              230 
                                                                                            ---------------- 
                                                                                                  933,134 
                                                                                            ---------------- 
             Retail (0.0%) 
    10,000   County Seat Holdings Co.  .......................................  10/15/98           -- 
                                                                                            ---------------- 
             TOTAL WARRANTS 
             (Identified Cost $2,711,249)  .............................................        3,998,559 
                                                                                            ---------------- 
</TABLE>

<TABLE>
<CAPTION>
 PRINCIPAL 
 AMOUNT IN                                                                    COUPON   MATURITY 
 THOUSANDS                                                                     RATE      DATE 
- ----------- ---------------------------------------------------------------- -------- ---------- 
<S>         <C>                                                              <C>      <C>        <C>
            SHORT-TERM INVESTMENTS (4.2%) 
            U.S. GOVERNMENT AGENCIES (f)(4.0%) 
   $15,850  Federal Farm Credit Bank  .......................................  5.42%   03/02/98     15,847,613 
    25,000  Federal Home Loan Mortgage Corp.  ...............................  5.41    03/03/98     24,992,486 
    50,000  Federal National Mortgage Assoc.  ...............................  5.61    03/02/98     49,992,209 
                                                                                                 ---------------- 
            TOTAL U.S. GOVERNMENT AGENCIES 
            (Amortized Cost $90,832,308)  .....................................................     90,832,308 
                                                                                                 ---------------- 
</TABLE>

                      SEE NOTES TO FINANCIAL STATEMENTS 

<PAGE>
DEAN WITTER HIGH YIELD SECURITIES INC. 
PORTFOLIO OF INVESTMENTS February 28, 1998 (unaudited) continued 

<TABLE>
<CAPTION>
  PRINCIPAL 
  AMOUNT IN                                                                    COUPON    MATURITY 
  THOUSANDS                                                                     RATE       DATE         VALUE 
- ----------------------------------------------------------------------------------------------------------------- 
<S>          <C>                                                                <C>        <C>     <C>
             REPURCHASE AGREEMENT (0.2%) 
    $3,600   The Bank of New York (dated 02/27/98;  proceeds $3,672,424)(g) 
              (Identified Cost $3,600,416)  ..................................  5.438%    03/02/98  $    3,600,416 
                                                                                                   --------------- 
             TOTAL SHORT-TERM INVESTMENTS 
             (Identified Cost $94,432,724)  ..................................                          94,432,724 
                                                                                                   --------------- 
             TOTAL INVESTMENTS 
             (Identified Cost $2,293,761,981)(h)  ............................             98.8%     2,222,083,998 
             OTHER ASSETS IN EXCESS OF LIABILITIES  ...................................     1.2         26,346,286 
                                                                                       ----------- --------------- 
             NET ASSETS  ..............................................................   100.0%    $2,248,430,284 
                                                                                       =========== =============== 
</TABLE>

- ------------ 
*       Resale is restricted to qualified institutional investors. 
+       Payment-in-kind security. 
++      Consists of one or more classes of securities traded together as a 
        unit; bonds or preferred stocks with attached warrants. 
++      Currently a zero coupon bond and will pay interest at the rate shown 
        at a future specified date. 
(a)     Non-income producing security; issuer in bankruptcy. 
(b)     Non-income producing security; bond in default. 
(c)     Non-income producing securities. 
(d)     Acquired through exchange offer. 
(e)     Includes 997,289 shares which are due from the issuer pursuant to a 
        reorganization. 
(f)     Securities were purchased on a discount basis. The interest rates 
        shown have been adjusted to reflect a money market equivalent yield. 
(g)     Collateralized by $117,623 U.S. Treasury Note 7.125% due 09/30/99 
        valued at $123,779, $1,000,000 Federal Home Loan Banks 6.615% due 
        08/15/07 valued at $1,049,328, $1,000,000 Federal Home Loan Mortgage 
        Assoc. Corp. 6.525% due 01/03/07 valued at $1,048,517, $388,364 
        Federal National Mortgage Assoc. 7.29% due 11/08/06 valued at 
        $405,502 and $1,020,000 Federal National Mortgage Assoc. 6.28% due 
        11/12/02 valued at $1,045,300. 
(h)     The aggregate cost for federal income tax purposes approximates 
        identified cost. The aggregate gross unrealized appreciation is 
        $108,014,380 and the aggregate gross unrealized depreciation is 
        $179,692,363, resulting in net unrealized depreciation of 
        $71,677,983. 

                      SEE NOTES TO FINANCIAL STATEMENTS 

<PAGE>
DEAN WITTER HIGH YIELD SECURITIES INC. 
FINANCIAL STATEMENTS 

STATEMENT OF ASSETS AND LIABILITIES 
February 28, 1998 (unaudited) 

<TABLE>
<CAPTION>
<S>                                                         <C>
ASSETS: 
Investments in securities, at value 
 (identified cost $2,293,761,981)..........................   $2,222,083,998 
Receivable for: 
  Interest.................................................       51,802,967 
  Capital stock sold.......................................       13,001,498 
Prepaid expenses and other assets..........................          253,717 
                                                            ---------------- 
  TOTAL ASSETS.............................................    2,287,142,180 
                                                            ---------------- 
LIABILITIES: 
Payable for: 
  Investments purchased ...................................       32,415,136 
  Dividends and distributions to shareholders .............        3,097,362 
  Capital stock repurchased ...............................        1,233,457 
  Plan of distribution fee.................................        1,039,845 
  Investment management fee ...............................          692,006 
Accrued expenses and other payables .......................          234,090 
                                                            ---------------- 
  TOTAL LIABILITIES........................................       38,711,896 
                                                            ---------------- 
  NET ASSETS...............................................   $2,248,430,284 
                                                            ================ 
COMPOSITION OF NET ASSETS: 
Paid-in-capital ...........................................   $3,226,411,823 
Net unrealized depreciation................................      (71,677,983) 
Accumulated undistributed net investment income  ..........        3,100,698 
Accumulated net realized loss..............................     (909,404,254) 
                                                            ---------------- 
  NET ASSETS ..............................................   $2,248,430,284 
                                                            ================ 
CLASS A SHARES: 
Net Assets.................................................   $   22,606,894 
Shares Outstanding (500,000,000 authorized, $.01 par 
 value)....................................................        3,332,454 
  NET ASSET VALUE PER SHARE ...............................            $6.78 
                                                                       ===== 
  MAXIMUM OFFERING PRICE PER SHARE, 
   (net asset value plus 4.44% of net asset value) ........            $7.08 
                                                                       ===== 
CLASS B SHARES: 
Net Assets.................................................   $1,732,703,099 
Shares Outstanding (500,000,000 authorized, $.01 par 
 value)....................................................      255,828,178 
  NET ASSET VALUE PER SHARE ...............................            $6.77 
                                                                       ===== 
CLASS C SHARES: 
Net Assets.................................................      $31,879,849 
Shares Outstanding (500,000,000 authorized, $.01 par 
 value)....................................................        4,701,489 
  NET ASSET VALUE PER SHARE ...............................            $6.78 
                                                                       ===== 
CLASS D SHARES: 
Net Assets.................................................     $461,240,442 
Shares Outstanding (500,000,000 authorized, $.01 par 
 value)....................................................       67,982,429 
  NET ASSET VALUE PER SHARE ...............................            $6.78 
                                                                       ===== 

</TABLE>

                      SEE NOTES TO FINANCIAL STATEMENTS 

<PAGE>
DEAN WITTER HIGH YIELD SECURITIES INC. 
FINANCIAL STATEMENTS, continued 

STATEMENT OF OPERATIONS 
For the six months ended February 28, 1998 (unaudited) 

<TABLE>
<CAPTION>
<S>                                        <C>
NET INVESTMENT INCOME: 
INTEREST INCOME ..........................  $ 91,324,830 
                                           -------------- 
EXPENSES 
Plan of distribution fee (Class A 
 shares)..................................        11,677 
Plan of distribution fee (Class B 
 shares)..................................     3,715,184 
Plan of distribution fee (Class C 
 shares)..................................        74,836 
Investment management fee.................     3,095,112 
Transfer agent fees and expenses..........       542,022 
Registration fees.........................       135,564 
Professional fees ........................        48,748 
Shareholder reports and notices ..........        43,850 
Custodian fees ...........................        38,495 
Directors' fees and expenses .............         8,503 
Other.....................................         9,401 
                                           -------------- 
  TOTAL EXPENSES .........................     7,723,392 
                                           -------------- 
  NET INVESTMENT INCOME ..................    83,601,438 
                                           -------------- 
NET REALIZED AND UNREALIZED LOSS: 
Net realized loss ........................    (5,676,343) 
Net change in unrealized depreciation  ...    (8,246,438) 
                                           -------------- 
  NET LOSS ...............................   (13,922,781) 
                                           -------------- 
NET INCREASE .............................  $ 69,678,657 
                                           ============== 
</TABLE>

                      SEE NOTES TO FINANCIAL STATEMENTS 

<PAGE>
DEAN WITTER HIGH YIELD SECURITIES INC. 
FINANCIAL STATEMENTS, continued 

STATEMENT OF CHANGES IN NET ASSETS 

<TABLE>
<CAPTION>
                                                       FOR THE SIX       FOR THE YEAR 
                                                       MONTHS ENDED         ENDED 
                                                    FEBRUARY 28, 1998  AUGUST 31, 1997* 
- --------------------------------------------------  ----------------- ---------------- 
                                                       (UNAUDITED) 
<S>                                                 <C>               <C>
INCREASE (DECREASE) IN NET ASSETS: 
OPERATIONS: 
Net investment income .............................   $   83,601,438     $ 55,526,474 
Net realized loss .................................       (5,676,343)     (39,986,189) 
Net change in unrealized depreciation .............       (8,246,438)      50,139,683 
                                                    ----------------- ---------------- 
  NET INCREASE ....................................       69,678,657       65,679,968 
                                                    ----------------- ---------------- 
DIVIDENDS TO SHAREHOLDERS FROM NET INVESTMENT 
INCOME: 
Class A shares.....................................         (634,950)         (12,761) 
Class B shares.....................................      (60,268,386)         (95,764) 
Class C shares.....................................         (952,391)         (32,881) 
Class D shares.....................................      (25,771,783)     (57,967,266) 
                                                    ----------------- ---------------- 
  TOTAL DIVIDENDS..................................      (87,627,510)     (58,108,672) 
                                                    ----------------- ---------------- 
Net increase from capital stock transactions ......    1,764,310,337       34,294,665 
                                                    ----------------- ---------------- 
  NET INCREASE ....................................    1,746,361,484       41,865,961 
NET ASSETS: 
Beginning of period................................      502,068,800      460,202,839 
                                                    ----------------- ---------------- 
  END OF PERIOD 
  (Including undistributed net investment income 
  of $3,100,698 and $7,755,090, respectively) .....   $2,248,430,284     $502,068,800 
                                                    ================= ================ 
</TABLE>

- ------------ 
*     Class A, Class B and Class C shares were issued July 28, 1997. 

                      SEE NOTES TO FINANCIAL STATEMENTS 

<PAGE>
DEAN WITTER HIGH YIELD SECURITIES INC. 
NOTES TO FINANCIAL STATEMENTS February 28, 1998 (unaudited) 

1. ORGANIZATION AND ACCOUNTING POLICIES 

Dean Witter High Yield Securities Inc. (the "Fund") is registered under the 
Investment Company Act of 1940, as amended, as a diversified, open-end 
management investment company. The Fund's primary investment objective is to 
earn a high level of current income and, as a secondary objective, capital 
appreciation, but only when consistent with its primary objective. The Fund 
was incorporated in Maryland on June 14, 1979 and commenced operations on 
September 26, 1979. On July 28, 1997, the Fund commenced offering three 
additional classes of shares, with the then current shares designated as 
Class D 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 Directors); (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 Dean Witter InterCapital Inc. (the 
"Investment Manager") 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 Directors (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 
Directors. The pricing service may utilize a 

<PAGE>
DEAN WITTER HIGH YIELD SECURITIES INC. 
NOTES TO FINANCIAL STATEMENTS February 28, 1998 (unaudited) continued 

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 portfolio 
securities valued by such pricing service; and (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. Dividend income and other distributions are recorded on the 
ex-dividend date. Discounts are accreted over the life of the respective 
securities. Interest income is accrued daily except where collection is not 
expected. 

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 record 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 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. 

<PAGE>
DEAN WITTER HIGH YIELD SECURITIES INC. 
NOTES TO FINANCIAL STATEMENTS February 28, 1998 (unaudited) continued 

2. INVESTMENT MANAGEMENT AGREEMENT 

Pursuant to an Investment Management Agreement, the Fund pays the Investment 
Manager a management fee, calculated 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: 0.50% to the portion of daily net assets not 
exceeding $500 million; 0.425% to the portion of daily net assets exceeding 
$500 million but not exceeding $750 million; 0.375% to the portion of daily 
net assets exceeding $750 million but not exceeding $1 billion; 0.35% to the 
portion of daily net assets exceeding $1 billion but not exceeding $2 
billion; 0.325% to the portion of daily net assets exceeding $2 billion but 
not exceeding $3 billion; and 0.30% to the portion of daily net assets 
exceeding $3 billion. 

Under the terms of the Agreement, in addition to managing the Fund's 
investments, the Investment 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 Investment Manager. The Investment Manager also bears the cost of 
telephone services, heat, light, power and other utilities provided to the 
Fund. 

3. PLAN OF DISTRIBUTION 

Shares of the Fund are distributed by Dean Witter Distributors Inc. (the 
"Distributor"), an affiliate of the Investment 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 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 0.85% 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, the account executives of Dean Witter Reynolds Inc. ("DWR"), an 
affiliate of the Investment Manager and Distributor, 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 preparation, printing and 
distribution of sales literature and advertising materials. In addition, the 
Distributor may utilize fees paid pursuant to the Plan, 

<PAGE>
DEAN WITTER HIGH YIELD SECURITIES INC. 
NOTES TO FINANCIAL STATEMENTS February 28, 1998 (unaudited) continued 

in the case of Class B shares, to compensate DWR 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 Directors will consider at that time the manner in 
which to treat such expenses. The Distributor has advised the Fund that such 
excess amounts, including carrying charges, totaled $43,339,086 at February 
28, 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 0.85% 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 account executives may be reimbursed in 
the subsequent calendar year. For the six months ended February 28, 1998, the 
distribution fee was accrued for Class A shares and Class C shares at the 
annual rate of 0.23% and 0.85%, respectively. 

The Distributor has informed the Fund that for the six months ended February 
28, 1998, it received contingent deferred sales charges from certain 
redemptions of the Fund's Class B shares and Class C shares of $732,079 and 
$19,041, respectively and received $226,919 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. 

4. 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 February 28, 1998, 
aggregated $833,041,919 and $524,755,962, respectively. 

Dean Witter Trust FSB, an affiliate of the Investment Manager, is the Fund's 
transfer agent. At February 28, 1998, the Fund had transfer agent fees and 
expenses payable of approximately $12,000. 

The Fund has an unfunded noncontributory defined benefit pension plan 
covering all independent Directors of the Fund who will have served as 
independent Directors for at least five years at the time of retirement. 
Benefits under this plan are based on years of service and compensation 
during the last five years of service. Aggregate pension costs for the six 
months ended February 28, 1998 included in 

<PAGE>
DEAN WITTER HIGH YIELD SECURITIES INC. 
NOTES TO FINANCIAL STATEMENTS February 28, 1998 (unaudited) continued 

Directors' fees and expenses in the Statement of Operations amounted to 
$1,805. At February 28, 1998, the Fund had an accrued pension liability of 
$49,150 which is included in accrued expenses in the Statement of Assets and 
Liabilities. 

5. CAPITAL STOCK 

Transactions in capital stock were as follows: 

<TABLE>
<CAPTION>
                                                                FOR THE SIX                   FOR THE YEAR 
                                                               MONTHS ENDED                       ENDED 
                                                             FEBRUARY 28, 1998              AUGUST 31, 1997* 
                                                      ------------------------------ ------------------------------ 
                                                                (UNAUDITED) 
                                                          SHARES          AMOUNT          SHARES         AMOUNT 
                                                      -------------- --------------  --------------  -------------- 
<S>                                                   <C>            <C>             <C>             <C>
CLASS A SHARES 
Sold.................................................     3,083,198   $   21,035,363       292,513    $  1,999,324 
Reinvestment of dividends............................        39,743          269,619           553           3,764 
Redeemed.............................................       (83,130)        (565,988)         (423)         (2,907) 
                                                      -------------- --------------  --------------  -------------- 
Net increase -Class A................................     3,039,811       20,738,994       292,643       2,000,181 
                                                      -------------- --------------  --------------  -------------- 
CLASS B SHARES 
Sold.................................................    59,625,239      405,829,797     2,516,637      17,204,073 
Reinvestment of dividends............................     3,355,701       22,703,830         6,503          44,221 
Shares issued in connection with the acquisition of 
 Dean Witter High Income Securities..................   214,915,122    1,469,485,599        --             -- 
Redeemed.............................................   (24,388,935)    (165,855,988)     (202,089)     (1,383,116) 
                                                      -------------- --------------  --------------  -------------- 
Net increase -Class B................................   253,507,127    1,732,163,238     2,321,051      15,865,178 
                                                      -------------- --------------  --------------  -------------- 
CLASS C SHARES 
Sold.................................................     4,933,115       33,660,649       766,860       5,242,777 
Reinvestment of dividends............................        75,870          515,377         2,742          18,649 
Redeemed.............................................    (1,073,645)      (7,313,078)       (3,453)        (23,617) 
                                                      -------------- --------------  --------------  -------------- 
Net increase -Class C................................     3,935,340       26,862,948       766,149       5,237,809 
                                                      -------------- --------------  --------------  -------------- 
CLASS D SHARES 
Sold.................................................       938,583        6,402,696     7,619,881      51,079,158 
Reinvestment of dividends ...........................     2,034,575       13,843,274     4,584,033      30,556,953 
Redeemed.............................................    (5,220,334)     (35,700,813)  (10,516,313)    (70,444,614) 
                                                      -------------- --------------  --------------  -------------- 
Net increase (decrease) -Class D.....................    (2,247,176)     (15,454,843)    1,687,601      11,191,497 
                                                      -------------- --------------  --------------  -------------- 
Net increase in Fund.................................   258,235,102   $1,764,310,337     5,067,444    $ 34,294,665 
                                                      ============== ==============  ==============  ============== 
</TABLE>
- ------------
*     For Class A, B, and C shares, for the period July 28 (issue date) 
      through August 31, 1997. 

<PAGE>
DEAN WITTER HIGH YIELD SECURITIES INC. 
NOTES TO FINANCIAL STATEMENTS February 28, 1998 (unaudited) continued 

6. FEDERAL INCOME TAX STATUS 

At August 31, 1997, the Fund had a net capital loss carryover of 
approximately $882,518,000 which may be used to offset future capital gains 
to the extent provided by regulations, which is available through August 31 
in the following years: 

<TABLE>
<CAPTION>
                                    AMOUNTS IN THOUSANDS 
- -------------------------------------------------------------------------------------------- 

    1998       1999        2000        2001       2002        2003        2004        2005 
- ----------- ---------------------- ----------- ---------------------- ----------- ----------- 
<S>         <C>        <C>         <C>         <C>        <C>         <C>         <C>
  $82,234    $293,125    $182,201    $45,084    $166,660    $50,599     $23,296       $39,319 
=========== ====================== =========== ====================== =========== =========== 
</TABLE>

Capital losses incurred after October 31 ("post-October" losses) within the 
taxable year are deemed to arise on the first business day of the Fund's next 
taxable year. The Fund incurred and will elect to defer net capital losses of 
approximately $10,031,000 during fiscal 1997. 

At August 31, 1997, the Fund had temporary book/tax differences primarily 
attributable to post-October losses and capital loss deferrals on wash sales. 

7. ACQUISITION OF DEAN WITTER HIGH INCOME SECURITIES 

As of the close of business on November 7, 1997, the Fund acquired all the 
net assets of Dean Witter High Income Securities ("High Income") pursuant to 
a plan of reorganization approved by the shareholders of High Income on 
October 24, 1997. The acquisition was accomplished by a tax-free exchange of 
214,915,122 Class B shares of the Fund at a net asset value of $6.84 per 
share for 147,149,092 shares of High Income. The net assets immediately 
before the acquisition were $552,658,205 for the Fund and $1,469,485,599 for 
High Income, including unrealized appreciation of $43,052,745. Immediately 
after the acquisition, the combined net assets of the Fund amounted to 
$2,022,143,804. 

<PAGE>
DEAN WITTER HIGH YIELD SECURITIES INC. 
FINANCIAL HIGHLIGHTS 

Selected ratios and per share data for a share of capital stock outstanding 
throughout each period: 

<TABLE>
<CAPTION>
                                               FOR THE SIX 
                                              MONTHS ENDED              FOR THE YEAR ENDED AUGUST 31 
                                              FEBRUARY 28,    ----------------------------------------------- 
                                                 1998++         1997*     1996      1995     1994      1993 
- -----------------------------------------  ------------------ --------  -------- --------  --------  -------- 
                                               (UNAUDITED) 
              CLASS D SHARES 
<S>                                        <C>                <C>       <C>      <C>       <C>      <C>
PER SHARE OPERATING PERFORMANCE: 
Net asset value, beginning of period .....      $ 6.82        $ 6.71    $ 6.77    $ 6.83   $ 7.58    $ 7.23 
                                               ---------     --------  --------  --------  -------- -------- 
Net investment income.....................        0.39          0.79      0.83      0.80     0.79      0.89 
Net realized and unrealized gain (loss) ..       (0.05)         0.15     (0.12)    (0.06)   (0.68)     0.54 
                                               ---------     --------  --------  --------  -------- -------- 
Total from investment operations..........        0.34          0.94      0.71      0.74     0.11      1.43 
                                               ---------     --------  --------  --------  -------- -------- 
Less dividends from net investment 
 income...................................       (0.38)        (0.83)    (0.77)    (0.80)   (0.86)    (1.08) 
                                               ---------     --------  --------  --------  -------- -------- 
Net asset value, end of period............      $ 6.78        $ 6.82    $ 6.71    $ 6.77   $ 6.83    $ 7.58 
                                               =========     ========  ========  ========  ======== ======== 
TOTAL INVESTMENT RETURN+..................        5.19%(1)     15.01%    11.07%    11.98%    0.93%    22.29% 
RATIOS TO AVERAGE NET ASSETS: 
Expenses..................................        0.56%(2)      0.68%     0.66%     0.79%    0.69%     0.67% 
Net investment income.....................        11.61%(2)    11.78%    12.27%    12.06%   10.40%    12.14% 
SUPPLEMENTAL DATA: 
Net assets, end of period, in millions ...       $  461       $  479    $  460    $  455   $  478    $  540 
Portfolio turnover rate...................           39%(1)      113%       49%       74%     127%      173% 
</TABLE>

- ------------ 
*      Prior to July 28, 1997, the Fund issued one class of shares. All shares 
       of the Fund held prior to that date have been designated 
       Class D shares. 
++     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 

<PAGE>
DEAN WITTER HIGH YIELD SECURITIES INC. 
FINANCIAL HIGHLIGHTS, continued 

<TABLE>
<CAPTION>
                                                                FOR THE PERIOD 
                                               FOR THE SIX      JULY 28, 1997* 
                                              MONTHS ENDED         THROUGH 
                                              FEBRUARY 28,        AUGUST 31, 
                                                 1998++             1997++ 
- -----------------------------------------  ------------------ ---------------- 
                                               (UNAUDITED) 
<S>                                        <C>                <C>
CLASS A SHARES 
PER SHARE OPERATING PERFORMANCE: 
Net asset value, beginning of period  ....       $ 6.82             $ 6.83 
                                           ------------------ ---------------- 
Net investment income.....................         0.39               0.07 
Net realized and unrealized loss  ........        (0.06)             (0.03) 
                                           ------------------ ---------------- 
Total from investment operations..........         0.33               0.04 
                                           ------------------ ---------------- 
Less dividends from net investment 
 income...................................        (0.37)             (0.05) 
                                           ------------------ ---------------- 
Net asset value, end of period............       $ 6.78             $ 6.82 
                                           ================== ================ 
TOTAL INVESTMENT RETURN+..................         5.08%(1)           0.65%(1) 
RATIOS TO AVERAGE NET ASSETS: 
Expenses .................................         0.75%(2)           0.93%(2) 
Net investment income.....................        11.48%(2)          11.80%(2) 
SUPPLEMENTAL DATA: 
Net assets, end of period, in millions ...          $23                 $2 
Portfolio turnover rate...................           39%(1)            113% 
CLASS B SHARES 
PER SHARE OPERATING PERFORMANCE: 
Net asset value, beginning of period  ....       $ 6.82             $ 6.83 
                                           ------------------ ---------------- 
Net investment income.....................         0.37               0.07 
Net realized and unrealized loss  ........        (0.07)             (0.03) 
                                           ------------------ ---------------- 
Total from investment operations..........         0.30               0.04 
                                           ------------------ ---------------- 
Less dividends from net invesment income .        (0.35)             (0.05) 
                                           ------------------ ---------------- 
Net asset value, end of period............       $ 6.77             $ 6.82 
                                           ================== ================ 
TOTAL INVESTMENT RETURN+..................         4.54%(1)           0.62%(1) 
RATIOS TO AVERAGE NET ASSETS: 
Expenses .................................         1.23%(2)           1.42%(2) 
Net investment income.....................        10.83%(2)          11.28%(2) 
SUPPLEMENTAL DATA: 
Net assets, end of period, in millions ...       $1,733                $16 
Portfolio turnover rate...................           39%(1)            113% 
</TABLE>

- ------------ 
*      The date shares were first issued. 
++     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 

<PAGE>
DEAN WITTER HIGH YIELD SECURITIES INC. 
FINANCIAL HIGHLIGHTS, continued 

<TABLE>
<CAPTION>
                                                                FOR THE PERIOD 
                                               FOR THE SIX      JULY 28, 1997* 
                                              MONTHS ENDED         THROUGH 
                                              FEBRUARY 28,        AUGUST 31, 
                                                 1998++             1997++ 
- -----------------------------------------  ------------------ ---------------- 
                                               (UNAUDITED) 
<S>                                        <C>                <C>
CLASS C SHARES 
PER SHARE OPERATING PERFORMANCE: 
Net asset value, beginning of period  ....       $ 6.82             $ 6.83 
                                           ------------------ ---------------- 
Net investment income.....................         0.37               0.07 
Net realized and unrealized loss  ........        (0.06)             (0.03) 
                                           ------------------ ---------------- 
Total from investment operations..........         0.31               0.04 
                                           ------------------ ---------------- 
Less dividends from net investment 
 income...................................        (0.35)             (0.05) 
                                           ------------------ ---------------- 
Net asset value, end of period............       $ 6.78             $ 6.82 
                                           ================== ================ 
TOTAL INVESTMENT RETURN+..................         4.62%(1)           0.62%(1) 
RATIOS TO AVERAGE NET ASSETS: 
Expenses .................................         1.39%(2)           1.52%(2) 
Net investment income.....................        10.82%(2)          11.18%(2) 
SUPPLEMENTAL DATA: 
Net assets, end of period, in millions ...          $32                 $5 
Portfolio turnover rate...................           39%(1)            113% 
</TABLE>

- ------------ 
*      The date shares were first issued. 
++     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 

<PAGE>




BOARD OF DIRECTORS

Michael Bozic 
Charles A. Fiumefreddo 
Edwin J. Garn 
John R. Haire 
Wayne E. Hedien
Dr. Manuel H. Johnson 
Michael E. Nugent 
Philip J. Purcell 
John L. Schroeder 


OFFICERS 

Charles A. Fiumefreddo 
Chairman and Chief Executive Officer 

Barry Fink 
Vice President, Secretary and General Counsel 

Peter M. Avelar
Vice President 

Thomas F. Caloia 
Treasurer 


TRANSFER AGENT 

Dean Witter Trust FSB
Harborside Financial Center - Plaza Two 
Jersey City, New Jersey 07311 


INDEPENDENT ACCOUNTANTS 

Price Waterhouse LLP 
1177 Avenue of the Americas 
New York, New York 10036 


INVESTMENT MANAGER 

Dean Witter InterCapital Inc. 
Two World Trade Center 
New York, New York 10048 

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 directors,
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.


DEAN WITTER
HIGH YIELD 
SECURITIES

SEMIANNUAL REPORT 
FEBRUARY 28, 1998 




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