USAA MUTUAL FUND INC
N-30D, 1999-03-25
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  Table of Contents

      USAA Family of Funds                                              1
      Message from the President                                        2
      Investment Review                                                 4
      Message from the Manager                                          5
      Financial Information:
         Categories & Definitions                                       7
         Portfolio of Investments                                       8
         Notes to Portfolio of Investments                             13
         Statement of Assets and Liabilities                           14
         Statement of Operations                                       15
         Statements of Changes in Net Assets                           16
         Notes to Financial Statements                                 17




Important Information

Through  our  ongoing  efforts to reduce  expenses  and  respond to  shareholder
requests, your annual and semiannual report mailings are "streamlined." One copy
of each report is sent to each address,  rather than to every registered  owner.
For many  shareholders  and their families,  this eliminates  duplicate  copies,
saving paper and postage costs to the Fund.

If you are the  primary  shareholder  on at least  one  account,  prefer  not to
participate in streamlining, and would like to continue receiving one report per
registered account owner, you may request this in writing to:

            USAA Investment Management Company
            Attn: Report Mail
            9800 Fredericksburg Road
            San Antonio, TX 78284-8916

or phone a Mutual Fund Representative at 1-800-531-8448 during business hours.

This  report is for the  information  of the  shareholders  and  others who have
received a copy of the currently  effective  prospectus  of the USAA  Short-Term
Bond Fund, managed by USAA Investment  Management Company (IMCO). It may be used
as sales  literature  only when preceded or accompanied by a current  prospectus
which gives further details about the Fund.

USAA with the eagle is registered in the U.S. Patent & Trademark Office. 
(Copyright)1999, USAA.  All rights reserved.




USAA Family of Funds Summary

         Fund                                             Minimum
       Type/Name                     Volatility          Investment*
       ---------                     ----------          ----------

 CAPITAL APPRECIATION
===============================================================================
 Aggressive Growth                 Very high               $3,000
 Emerging Markets(1)               Very high               $3,000
 First Start Growth                Moderate to high        $3,000
 Gold(1)                           Very high               $3,000
 Growth                            Moderate to high        $3,000
 Growth & Income                   Moderate                $3,000
 International(1)                  Moderate to high        $3,000
 S&P 500 (Registered Trademark)
  Index(2)                         Moderate                $3,000
 Science & Technology(5)           Very high               $3,000
 World Growth(1)                   Moderate to high        $3,000
       
 ASSET ALLOCATION            
===============================================================================
 Balanced Strategy(1)              Moderate                $3,000
 Cornerstone Strategy(1)           Moderate                $3,000
 Growth and Tax
  Strategy(3)                      Moderate                $3,000
 Growth Strategy(1)                Moderate to high        $3,000
 Income Strategy                   Low to moderate         $3,000
          
 INCOME - TAXABLE         
===============================================================================
 GNMA                              Low to moderate         $3,000
 Income                            Moderate                $3,000
 Income Stock                      Moderate                $3,000
 Short-Term Bond                   Low                     $3,000
              
 INCOME - TAX EXEMPT        
===============================================================================
 Long-Term(3)                      Moderate                $3,000
 Intermediate-Term(3)              Low to moderate         $3,000
 Short-Term(3)                     Low                     $3,000
 State Bond Income(3)**            Moderate                $3,000
       
 MONEY MARKET        
===============================================================================
 Money Market(4)                   Very low                $3,000
 Tax Exempt
  Money Market(3),(4)              Very low                $3,000
 Treasury Money
  Market Trust(4)                  Very low                $3,000
 State Money Market(3),(4)**       Very low                $3,000



(1)  Foreign  investing is subject to additional  risks,  which are discussed in
     the funds' prospectuses.

(2)  S&P 500 (Registered Trademark) is a trademark of The McGraw-Hill Companies,
     Inc. and has been licensed for use. The Product is not  sponsored,  sold or
     promoted  by   Standard  &  Poor's,   and   Standard  &  Poor's   makes  no
     representation regarding the advisability of investing in the Product.

(3)  Some  income  may be  subject  to  state  or  local  taxes  or the  federal
     alternative minimum tax.

(4)  An investment  in a money market fund is not insured or  guaranteed  by the
     FDIC or any other government agency.  Although the fund  seeks  to preserve
     the value of your investment at $1 per share, it is possible to lose  money
     by investing in the fund.

(5)  This Fund may be more  volatile  than a fund that  diversifies  across many
     industries.

 *   The  InveStart (Registered Trademark)  program is available  for  investors
     without the $3,000 initial investment  required to open an IMCO mutual fund
     account.  A mutual fund account can be opened with no initial investment if
     you elect to have monthly automatic investments of at least $50 from a bank
     account.  InveStart  is not  available on  tax-exempt  funds or the S&P 500
     Index Fund. The minimum initial investment for IRAs is $250, except for the
     $2,000 minimum  required for the S&P 500 Index Fund. IRAs are not available
     for tax-exempt  funds. The Growth and Tax Strategy Fund is not available as
     an  investment  for your IRA  because  the  majority  of its  income is tax
     exempt.

**   California,  Florida,  New York,  Texas,  and Virginia funds available to
     residents only.  


Non-deposit investment products are not insured by the FDIC, are not deposits or
other  obligations  of, or guaranteed  by, USAA Federal  Savings  Bank,  and are
subject to investment risks, and may lose value.

For more complete  information about the mutual funds managed and distributed by
USAA Investment  Management  Company,  including charges and operating expenses,
please  call  1-800-531-8181  for a  prospectus.  Read it  carefully  before you
invest.




Message from the President


[PHOTOGRAPH OF PRESIDENT AND VICE CHAIRMAN OF THE BOARD, MICHAEL J.C. ROTH, CFA,
 APPEARS HERE]


The last half of 1998 was a fascinating time in the financial markets. While the
press,  as usual,  devoted most of its  attention to stock  markets,  the income
markets were perhaps even more interesting.

The turmoil in foreign debt markets coupled with the problems of a notable hedge
fund, set off an almost incredible wave of events. I use the word "wave" because
it so well describes the reaction that occurred in the U.S. Treasury  securities
market. We see this in the chronology of yields on the 30-year Treasury bond:


                 U.S. Treasury                30-year Yield
                 ------------------------------------------
                 August 3, 1998                   5.66%
                 September 1, 1998                5.34%
                 October 1, 1998                  4.88%
                 November 2, 1998                 5.24%
                 December 1, 1998                 5.03%


And, as this is being written in early March 1999, the 30-year bond has returned
to the level of August 1998.

These seemingly dry numbers tell a story that is filled with terror.  This was a
flight to quality and a flight away from  anything that smacked of risk. It is a
reminder  that  mutual  funds  are not  bank  accounts.  They  are  conduits  to
securities  markets,  and those markets must function every day. If the world is
in turmoil,  that  functioning will be rocky, but that does not mean all is bad.
If you owned  Russian  or  Brazilian  bonds it was bad.  But if you  owned  U.S.
Treasuries it was absolutely wonderful.

That is the great lesson here. A tumultuous  market produces  winners as well as
losers because money must flow somewhere. That's one reason we diversify. That's
one reason we don't pay much attention to doomsayers.

Sincerely,


Michael J.C. Roth, CFA
President and
Vice Chairman of the Board



For more complete  information about the mutual funds managed and distributed by
USAA Investment  Management  Company,  including charges and operating expenses,
please call for a prospectus. Read it carefully before investing.

Past performance is no guarantee of future results.





Investment Review

USAA SHORT-TERM BOND FUND

OBJECTIVE: High current income consistent with preservation of principal.

TYPES OF INVESTMENTS: A broad range of investment-grade debt securities.


- ----------------------------------------------------------------------------
                                           7/31/98              1/31/99
============================================================================
  Net Assets                            $181.2 Million       $211.2 Million
  Net Asset Value Per Share                 $9.99                 $9.88
- ----------------------------------------------------------------------------


- ----------------------------------------------------------------------------
AVERAGE ANNUAL TOTAL RETURNS AS OF 1/31/99                             
============================================================================
      7/31/98 to                                             Since Inception
       1/31/99               1 Year           5 Years          on 6/1/93
        2.08%(+)              4.65%            5.84%             5.81%
- -----------------------------------------------------------------------------
(+)  Total  returns for periods of less than one year are not  annualized.  This
     six-month return is cumulative.

Total  return   equals   income  yield  plus  share  price  change  and  assumes
reinvestment of all dividends and capital gain distributions.  No adjustment has
been made for taxes payable by shareholders on their reinvested income dividends
and capital gain  distributions.  The  performance  data quoted  represent  past
performance and are not an indication of future results.  Investment  return and
principal value of an investment will fluctuate,  and an investor's shares, when
redeemed, may be worth more or less than their original cost.





                   CUMULATIVE PERFORMANCE COMPARISON

A chart in the form of a line graph appears here, illustrating the comparison of
a $10,000  hypothetical  investment in the USAA Short-Term Bond Fund, the Lehman
Brothers 1-3 Year Government/Corporation  Index, and the Lipper Short Investment
Grade Debt Funds Average, for the period of 06/01/93 through 01/31/99.  The data
points from the graph are as follows:

              USAA Short-              Lehman 1-3         Lipper Short Inv Grade
            Term Bond Fund          Govt/Corp Index         Grade Debt Average
            --------------          ---------------       ----------------------

06/01/93      $10,000                    $10,000                   $10,000
07/93          10,087                     10,099                    10,122
01/94          10,372                     10,351                    10,385
07/94          10,259                     10,329                    10,306
01/95          10,388                     10,483                    10,418
07/95          11,070                     11,077                    10,989
01/96          11,501                     11,574                    11,492
07/96          11,692                     11,690                    11,581
01/97          12,234                     12,124                    12,025
07/97          12,741                     12,554                    12,451
01/98          13,162                     12,994                    12,845
07/98          13,494                     13,321                    13,149
01/99          13,775                     13,824                    13,504

Data from 6/1/93 through 1/31/99


The graph illustrates the comparison of a $10,000 hypothetical investment in the
USAA  Short-Term  Bond  Fund  to  the  broad-based   Lehman  Brothers  1-3  Year
Government/Corporate  Index and the  Lipper  Short  Investment  Grade Debt Funds
Average.  The Lehman Index is an unmanaged index made up of government,  agency,
and corporate  bonds longer than one year and less than three years.  The Lipper
Average is the  average  performance  level of all Short  Investment  Grade Debt
Funds,  as  reported  by  Lipper  Analytical  Services,   Inc.,  an  independent
organization that monitors the performance of mutual funds.






Message from the Manager


[PHOTOGRAPH OF PORTFOLIO MANAGER:  PAUL LUNDMARK, CFA APPEARS HERE]


THE MARKET
I  manage  the  Short-Term  Bond  Fund so  that income is the primary  component
of total return. As of January 31, 1999, the twelve-month dividend yield for the
Fund was  6.07%  versus  the  average  of 5.57% for  other  funds in the  Lipper
Short-Term  Investment  Grade Debt Funds  category.(1)  While the yield compared
favorably  to my peers,  the Fund lagged in terms of change in net asset  value.
The  reason  for  this  underperformance  was  that at the  beginning  of  1998,
short-term U.S. Treasury rates (1-5 years) were close to or lower than overnight
rates.  In order to keep the Fund's yield up, I invested in corporate  bonds and
mortgage and asset-backed securities.  Thus I was underweighted in U.S. Treasury
bonds versus my peers. This management style worked well until the recent market
turmoil.  The  months of August  and  September  saw a "flight  to  quality"  as
investors avoided  investments that had any element of risk and scrambled to buy
U.S. Treasury  securities at inflated prices. This resulted in all asset classes
underperforming U.S. Treasuries.

In my opinion,  the negative  market  sentiment  became  overdone which provided
buying opportunities. I purchased Merrill Lynch and AT&T Capital corporate bonds
that have subsequently risen in price.

The best performing  bonds in the portfolio were Waste  Management and WorldCom.
Waste  Management  was acquired by USA Waste and WorldCom  acquired  MCI.  These
combinations  resulted in financially  stronger companies.  While positive,  the
returns  for real  estate  investment  trusts  (REIT)  corporate  bonds  and the
collateralized  mortgage  obligation (CMO) securities fell short of the rally in
treasuries.  I am  continuing to hold these  securities  because they are priced
cheap  compared to treasuries  and could  potentially  outperform in more normal
market conditions.


(1)  Lipper  Analytical  Services,  Inc.  is an  independent  organization  that
     monitors  the  performance  of mutual  funds.  Rankings  are based on total
     return.


Past performance is no guarantee of future results.

This past year has been challenging.  While I have made an effort to upgrade the
credit quality of the Fund, in certain market conditions, technical factors such
as  liquidity  can far outweigh the  fundamentals.  However,  I believe that the
philosophy of maximizing  income  through  credit  analysis  without  timing the
market should work well over time.






                                 PORTFOLIO MIX

A pie chart is shown here  depicting the Portfolio Mix as of January 31, 1999 of
the USAA Short-Term Bond Fund to be:

Bonds/Notes - 74.6%*;  Variable Rate Demand Notes - 18.2%*; and Commercial Paper
- - 5.6%*.

*  Percentages  are of the Net Assets in the  Portfolio and may or may not equal
   100%.


See page 8 for a complete listing of the Portfolio of Investments.






USAA SHORT-TERM BOND FUND
CATEGORIES AND DEFINITIONS
PORTFOLIO OF INVESTMENTS

January 31, 1999
(Unaudited)

Fixed  Rate  Instruments  - consist  of bonds and notes.  The  interest  rate is
constant  to  maturity.  Prior to  maturity,  the market  price of a  fixed-rate
instrument generally varies inversely to the movement of interest rates.

Variable  Rate Demand Notes (VRDN) - provide the right,  on any business day, to
sell the  security  at face  value on either  that day or  within  30 days.  The
interest rate is adjusted at a stipulated daily,  weekly, or monthly interval to
a rate that reflects  current market  conditions.  In bond funds,  the effective
maturity is the next put date.

Cash  Equivalents  -  consist  of  short-term   obligations   issued  by  banks,
corporations,  and U.S.  Government  Agencies.  The interest rate is constant to
maturity.


PORTFOLIO DESCRIPTION ABBREVIATIONS
    COP    Certificate of Participation  
    IDA    Industrial Development Authority/Agency
    IDB    Industrial Development Board
    HFA    Housing Finance Authority 
    MFH    Multi-Family Housing 
    MTN    Medium-Term Note
    PCRB   Pollution Control Revenue Bond 
    RB     Revenue Bond


Credit  Enhancements  - add  the  financial  strength  of  the  provider  of the
enhancement to support the issuer's ability to repay the principal when due. The
enhancement may be provided by either a high quality bank, insurance company, or
other corporation, or a collateral trust.

    (LOC) Enhanced by a bank letter of credit.

<TABLE>






USAA SHORT-TERM BOND FUND
PORTFOLIO OF INVESTMENTS

January 31, 1999
(Unaudited)


<CAPTION>

  Principal                                               Coupon                 Market
   Amount          Security                                Rate     Maturity     Value
- ----------------------------------------------------------------------------------------
                         FIXED RATE INSTRUMENTS (74.6%)
                            CORPORATE BONDS (54.6%)
<C>         <S>                                            <C>      <C>        <C>
            Banks - Major Regional
$   4,500   Corporacion Andina De Fomento, Global
             Bonds                                         7.38%    7/21/2000  $   4,498
    4,000   Corporacion Andina De Fomento, Global
             Bonds                                         7.10     2/01/2003      3,932
- ----------------------------------------------------------------------------------------
                                                                                   8,430
- ----------------------------------------------------------------------------------------

            Finance - Consumer
    6,000   Capital One Bank, Bank Notes                   5.95     2/15/2001      5,949
    3,000   Capital One Bank, Bank Notes                   6.15     6/01/2001      2,979
- ----------------------------------------------------------------------------------------
                                                                                   8,928
- ----------------------------------------------------------------------------------------

            Finance - Diversified
    9,000   AT&T Capital Corp., MTN                        7.50    11/15/2000      9,176
- ----------------------------------------------------------------------------------------

            Investment Banks/Brokerage
    5,000   Merrill Lynch & Co., Inc., Notes               6.00     2/12/2003      5,076
- ----------------------------------------------------------------------------------------

            Manufacturing - Diversified Industries
    9,000   Edperbrascan Corp., Notes                      7.13    12/16/2003      8,961
- ----------------------------------------------------------------------------------------

            Real Estate Investment Trusts
    3,000   Developers Diversified Realty Corp.,
             Senior Notes                                  7.63     5/15/2000      3,048
    7,000   Equity Operating L.P., Notes (a)               6.38     2/15/2002      6,999
    7,000   Franchise Finance Corp. of America,
             Senior Notes                                  7.00    11/30/2000      7,016
    8,000   Glenborough Property, L.P., Senior Notes (a)   7.63     3/15/2005      7,679
    7,000   HRPT Properties Trust, Senior Notes            6.70     2/23/2005      6,834
    3,000   Nationwide Health Properties, Inc., MTN        8.61     3/01/2002      3,116
    5,000   Oasis Residential, Inc., Notes                 6.75    11/15/2001      4,946
    4,500   TriNet Corporate Realty Trust, Inc., Notes     7.30     5/15/2001      4,538
- ----------------------------------------------------------------------------------------
                                                                                  44,176
- ----------------------------------------------------------------------------------------

            Retail - General Merchandising
    3,000   Dayton Hudson Corp., Notes                     5.95     6/15/2000      3,026
    2,000   Kmart Corp., MTN                               7.72     6/25/2002      2,020
    2,000   Kmart Corp., MTN                               7.76     7/01/2002      2,023
- ----------------------------------------------------------------------------------------
                                                                                   7,069
- ----------------------------------------------------------------------------------------

            Retail - Specialty
    3,000   MacSaver Financial Services, Inc., Notes       7.40      2/15/2002     2,415
- ----------------------------------------------------------------------------------------

            Telecommunications - Long Distance
    2,500   WorldCom, Inc., Senior Notes                   6.13      8/15/2001     2,545
    4,000   WorldCom, Inc., Senior Notes                   7.55      4/01/2004     4,352
- ----------------------------------------------------------------------------------------
                                                                                   6,897
- ----------------------------------------------------------------------------------------

            Waste Management
    8,000   Browning Ferris Industries, Inc.               6.08      1/18/2000     8,004
    6,000   Waste Management, Inc., Notes                  6.38     12/01/2003     6,114
- ----------------------------------------------------------------------------------------
                                                                                  14,118
- ----------------------------------------------------------------------------------------
            Total corporate bonds (cost: $115,381)                               115,246
- ----------------------------------------------------------------------------------------

                        ASSET BACKED SECURITIES (7.1%)
    6,000   FirstPlus Home Loan Owner Trust, Series
             1997-4, Class A-5                             6.62      9/10/2015     6,066
    4,000   Firstplus Home Loan Owner Trust, Series
             1998-2, Class A-4                             6.54      4/10/2015     3,987
    5,000   Firstplus Home Loan Owner Trust, Series
             1998-4, Class A-3                             6.24      5/11/2015     4,954
- ----------------------------------------------------------------------------------------
            Total asset backed securities (cost: $14,999)                         15,007
- ----------------------------------------------------------------------------------------

                  COLLATERILIZED MORTGAGE OBLIGATIONS (12.9%)
    4,725   Federal Home Loan Mortgage Corp.,
             Series 1998-11 M                              9.00      2/18/2024     4,977
    2,653   Federal Home Loan Mortgage Corp.,
             Series 1998-2 GA                              8.50      4/18/2025     2,733
    6,043   Federal Home Loan Mortgage Corp.,
             Series 1998-7 H                               9.00      3/18/2025     6,378
    5,051   Federal National Mortgage Assn.,
             Series 1997-72 CA                             9.50      9/18/2023     5,187
    3,068   Federal National Mortgage Assn.,
             Series 1997-79 U                              9.00     11/18/2024     3,164
    4,710   Federal National Mortgage Assn.,
             Series 1997-89 N                              9.50     12/20/2022     4,903
- ----------------------------------------------------------------------------------------
            Total collateralized mortgage obligations (cost: $28,446)             27,342
- ----------------------------------------------------------------------------------------
            Total fixed rate instruments (cost: $158,826)                        157,595
- ----------------------------------------------------------------------------------------

                  VARIABLE RATE DEMAND NOTES (18.2%)
            Appropriated Debt
    9,500   City of Gardena, CA, COP, Series 1995 (LOC)    7.20      7/01/2025     9,500
- ----------------------------------------------------------------------------------------

            Buildings
    2,030   Goson, Notes, Series 1997 (LOC)                5.02     11/01/2017     2,030
    2,075   Montgomery, AL, IDB RB, Series 1996C (LOC)     5.10      7/01/2016     2,075
    1,485   Scottsboro, AL, IDB RB, Series 1995 (LOC)      5.10     10/01/2010     1,485
- ----------------------------------------------------------------------------------------
                                                                                   5,590
- ----------------------------------------------------------------------------------------

            Finance - Diversified
      610   New Jersey Economic Development Auth.
             Bonds, Series 1996A2 (LOC)                    5.05     11/01/2016       610
      545   New Jersey Economic Development Auth.
             Bonds, Series 1996D2 (LOC)                    5.05     11/01/2006       545
- ----------------------------------------------------------------------------------------
                                                                                   1,155
- ----------------------------------------------------------------------------------------

            Foods
    1,500   Colorado HFA Economic Development RB,
             Series 1998B (LOC)                            5.05     10/01/2018     1,500
- ----------------------------------------------------------------------------------------

            Heavy Duty Trucks & Parts
    2,680   Missouri Economic Development Export
             IDA RB, Series 1993B (LOC)                    4.90      6/01/2008     2,680
- ----------------------------------------------------------------------------------------

            Lodging/Hotel
    2,540   Birmingham, AL, Historical Preservation
             Auth. Taxable RB, Series 1993 (LOC)           5.75      5/01/2018     2,540
- ----------------------------------------------------------------------------------------

            Manufacturing - Specialized
    4,300   Spencer County Tax PCRB, Series 1998 (LOC)     5.54      9/01/2018     4,300
- ----------------------------------------------------------------------------------------

            Multi-Family Housing
      155   Bartlett, IL, MFH RB, Series 1995 (LOC)        6.00      3/01/2025       155
- ----------------------------------------------------------------------------------------

            Real Estate - Other
    1,925   Wynrose, Inc., Notes, Series 1995A (LOC)       5.10     11/01/2005     1,925
- ----------------------------------------------------------------------------------------

            Special Assessment/Tax/Fee
    7,700   Orange County Special Finance Auth. RB,
             Series 1995A (LOC)                            6.10     11/01/2014     7,700
- ----------------------------------------------------------------------------------------

            Miscellaneous
    1,370   Ontario Redevelopment Agency, CA, RB,
             Series B (LOC)                                5.50      9/01/2027     1,370
- ----------------------------------------------------------------------------------------
            Total variable rate demand notes (cost: $38,415)                      38,415
- ----------------------------------------------------------------------------------------

                                CASH EQUIVALENTS (5.6%)
            Commercial Paper
    2,393   MCN Investment Corp.                           5.07      2/01/1999     2,392
    9,500   Los Angeles County Metropolitan
             Transportation Auth. Notes (LOC)              5.80      2/02/1999     9,500
- ----------------------------------------------------------------------------------------
            Total cash equivalents (cost: $11,892)                                11,892
- ----------------------------------------------------------------------------------------
            Total investments (cost: $209,133)                                 $ 207,902
========================================================================================

</TABLE>






USAA SHORT-TERM BOND FUND
PORTFOLIO OF INVESTMENTS (CONTINUED)

January 31, 1999
(Unaudited)

                          PORTFOLIO SUMMARY BY INDUSTRY
                          -----------------------------

            Real Estate Investment Trusts                       20.9%
            Collateralized Mortgage Obligations                 12.9
            Asset Backed Securities                              7.1
            Waste Management                                     6.7
            Finance - Diversified                                4.9
            Appropriated Debt                                    4.5
            Sales Tax                                            4.5
            Manufacturing - Diversified Industries               4.2
            Finance - Consumer                                   4.2
            Banks - Major Regional                               4.0
            Special Assessment/Tax/Fee                           3.6
            Retail - General Merchandising                       3.4
            Telecommunications - Long Distance                   3.3
            Buildings                                            2.7
            Investment Banks / Brokerage                         2.4
            Manufacturing - Specialized                          2.0
            Heavy Duty Trucks & Parts                            1.3
            Lodging/Hotel                                        1.2
            Retail - Specialty                                   1.1
            Natural Gas Utilities                                1.1
            Other                                                2.4
                                                                ----
                                                                98.4%
                                                                ====






USAA SHORT-TERM BOND FUND
NOTES TO PORTFOLIO OF INVESTMENTS

January 31, 1999
(Unaudited)


GENERAL NOTES
Market values of securities are determined by procedures and practices discussed
in note 1 to the financial statements.

The cost of securities for federal income tax purposes is approximately the same
as that reported in the financial statements.

The percentages shown represent the percentage of the investments to net assets.


SPECIFIC NOTES
(a) Security is exempt from  registration  under the  Securities Act of 1933 and
has been determined to be liquid by the Fund's investment manager. Any resale of
this  security  in the  United  States may occur in an exempt  transaction  to a
qualified institutional buyer as defined by the Rule 144A.

See accompanying notes to financial statements.






<TABLE>

USAA SHORT-TERM BOND FUND
STATEMENT OF ASSETS AND LIABILITIES
(IN THOUSANDS)

January 31, 1999
(Unaudited)

<S>                                                                            <C>
ASSETS
   Investments in securities, at market value (identified cost of $209,133)    $207,902
   Cash                                                                             162
   Receivables:
      Capital shares sold                                                         1,175
      Interest                                                                    2,585
                                                                               --------
         Total assets                                                           211,824
                                                                               --------

LIABILITIES
   Capital shares redeemed                                                          479
   USAA Transfer Agency Company                                                      31
   Accounts payable and accrued expenses                                             27
   Dividends on capital shares                                                       93
                                                                               --------
         Total liabilities                                                          630
                                                                               --------
            Net assets applicable to capital shares outstanding                $211,194
                                                                               ========

REPRESENTED BY:
   Paid-in capital                                                             $212,520
   Accumulated net realized loss on investments                                     (95)
   Net unrealized depreciation of investments                                    (1,231)
                                                                               --------
            Net assets applicable to capital shares outstanding                $211,194
                                                                               ========
   Capital shares outstanding                                                    21,375
                                                                               ========
   Authorized shares of $.01 par value                                          120,000
                                                                               ========
   Net asset value, redemption price, and offering price per share             $   9.88
                                                                               ========

See accompanying notes to financial statements.

</TABLE>





USAA SHORT-TERM BOND FUND
STATEMENT OF OPERATIONS
(IN THOUSANDS)

Six-month period ended January 31,1999
(Unaudited)


Net investment income:
   Interest income                                                       $6,262
                                                                         ------
   Expenses:
      Management fees                                                       238
      Transfer agent's fees                                                 163
      Custodian's fees                                                       39
      Postage                                                                13
      Shareholder reporting fees                                              9
      Director's Fees                                                         2
      Registration fees                                                      59
      Professional fees                                                      19
      Other                                                                   2
                                                                         ------
         Total expenses before reimbursement                                544
      Expenses reimbursed                                                   (54)
                                                                         ------
         Total expenses after reimbursement                                 490
                                                                         ------
            Net investment income                                         5,772
                                                                         ------
Net realized and unrealized loss on investments:
   Net realized loss                                                        (64)
   Change in net unrealized appreciation/depreciation                    (1,720)
                                                                         ------
            Net realized and unrealized loss                             (1,784)
                                                                         ------
Increase in net assets resulting from operations                         $3,988
                                                                         ======

 See accompanying notes to financial statements.






<TABLE>

USAA SHORT-TERM BOND FUND  
STATEMENTS OF CHANGES IN NET ASSETS 
(IN  THOUSANDS)

Six-month period ended January 31, 1999
and Year ended July 31, 1998
(Unaudited)

<CAPTION>


                                                               1/31/99         7/31/98
                                                              -------------------------
<S>                                                           <C>              <C>
From operations:
   Net investment income                                      $  5,772         $  9,482
   Net realized gain (loss) on investments                         (64)             442
   Change in net unrealized appreciation/depreciation of
      investments                                               (1,720)            (936)
                                                              -------------------------
      Increase in net assets resulting from operations           3,988            8,988
                                                              -------------------------
Distributions to shareholders from:
   Net investment income                                        (5,772)          (9,472)
                                                              -------------------------
   Net realized gains                                             (465)             --
                                                              -------------------------
From capital share transactions:
   Proceeds from shares sold                                    77,471          105,161
   Shares issued for dividends reinvested                        5,583            8,269
   Cost of shares redeemed                                     (50,782)         (65,521)
                                                              -------------------------
      Increase in net assets from capital share transactions    32,272           47,909
                                                              -------------------------
Net increase in net assets                                      30,023           47,425
Net assets:
   Beginning of period                                         181,171          133,746
                                                              -------------------------
   End of period                                              $211,194         $181,171
                                                              =========================
Change in shares outstanding:
   Shares sold                                                    7,803          10,515
   Shares issued for dividends reinvested                           562             827
   Shares redeemed                                               (5,121)         (6,550)
                                                              -------------------------
      Increase in shares outstanding                              3,244           4,792
                                                              =========================
 
See accompanying notes to financial statements.

</TABLE>






USAA SHORT-TERM BOND FUND
NOTES TO FINANCIAL STATEMENTS

January 31, 1999
(Unaudited)

(1) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
USAA MUTUAL FUND, INC. (the Company),  registered  under the Investment  Company
Act of 1940, as amended, is a diversified, openend management investment company
incorporated  under the laws of Maryland  consisting of ten separate funds.  The
information  presented  in this  semiannual  report  pertains  only to the  USAA
Short-Term Bond Fund (the Fund). The Funds investment  objective is high current
income  consistent with  preservation of principal.  USAA Investment  Management
Company (the  Manager)  seeks to achieve this  objective by investing  the Funds
assets   primarily  in  U.S.   dollar-denominated   debt   securities  that  are
investment-grade  at the  time of  their  purchase.  The Fund  will  maintain  a
dollar-weighted average portfolio maturity of three years or less.

A.  Security  valuation - The value of each  security is  determined  (as of the
close of  trading  on the New  York  Stock  Exchange  on each  business  day the
Exchange is open) as set forth below:

1. Debt and  government  securities  are valued each  business  day by a pricing
service (the  Service)  approved by the Fund's Board of  Directors.  The Service
uses the mean  between  quoted  bid and asked  prices or the last sale  price to
price  securities  when,  in the Service's  judgement,  these prices are readily
available and are  representative  of the  securities'  market values.  For many
securities,  such prices are not readily available. The Service generally prices
these  securities  based on methods  which  include  consideration  of yields or
prices  of  securities  of  comparable  quality,   coupon,  maturity  and  type,
indications  as to  values  from  dealers  in  securities,  and  general  market
conditions.

2.  Over-the-counter  securities  are priced  at the last sales price or, if not
available, at the average of the bid and asked prices.

3.  Securities purchased  with  maturities  of  60 days or less  are  stated  at
amortized cost which approximates market value.

4.  Securities which cannot be valued by the methods set forth  above,  and  all
other assets,  are valued in good faith at fair value,  using methods determined
by the Manager under the general supervision of the Board of Directors.

B.  Federal taxes - The Fund's policy is to comply with the  requirements of the
Internal  Revenue Code  applicable  to  regulated  investment  companies  and to
distribute  substantially all of its income to its shareholders.  Therefore,  no
federal income or excise tax provision is required.

C.  Investments in securities - Security  transactions  are accounted for on the
date the securities are purchased or sold (trade date).  Gain or loss from sales
of investment  securities  is computed on the  identified  cost basis.  Interest
income is recorded on the accrual  basis.  Discounts  and premiums on securities
are amortized over the life of the respective securities.

D.  Use of estimates - The preparation of  financial  statements  in  conformity
with  generally  accepted  accounting  principles  requires  management  to make
estimates and assumptions  that may affect the reported amounts in the financial
statements.

(2) LINES OF CREDIT
The Fund participates with other USAA funds in three joint short-term  revolving
loan  agreements  totaling  $850  million,  two with  USAA  Capital  Corporation
(CAPCO),  an affiliate of the Manager ($250  million  committed and $500 million
uncommitted),  and one with NationsBank of Texas, N.A. ($100 million committed).
The purpose of the  agreements  is to meet  temporary or  emergency  cash needs,
including   redemption  requests  that  might  otherwise  require  the  untimely
disposition of securities.  Subject to  availability  under both agreements with
CAPCO,  the Fund may borrow  from  CAPCO an amount up to 5% of the Fund's  total
assets at CAPCO's borrowing rate with no markup.  Subject to availability  under
its agreement with  NationsBank,  the Fund may borrow from NationsBank an amount
which, when added to outstanding borrowings under the CAPCO agreements, does not
exceed 25% of the Fund's total  assets at  NationsBank's  borrowing  rate plus a
markup.  The Fund had no  borrowings  under any of these  agreements  during the
six-month period ended January 31, 1999.


(3) DISTRIBUTIONS
Net  investment  income  is  accrued  daily  as  dividends  and  distributed  to
shareholders monthly. Distributions of realized gains from security transactions
not  offset by  capital  losses  are made in the  succeeding  fiscal  year or as
otherwise required to avoid the payment of federal taxes.


(4) INVESTMENT TRANSACTIONS
Cost of purchases and proceeds from sales of  securities,  excluding  short-term
securities,  for the six-month  period ended January 31, 1999 were $43.0 million
and $5.5 million, respectively.

Gross unrealized  appreciation and depreciation of investments as of January 31,
1999 was $1.2 million and $2.4 million, respectively.


(5) TRANSACTIONS WITH MANAGER
A.  Management fees - USAA Investment Management  Company carries out the Fund's
investment policies and manages the Fund's portfolio. The Fund's management fees
are computed at .24% of its annual average net assets.

The Manager has  voluntarily  agreed to limit the annual expenses of the Fund to
 .50% of its annual  average net assets.  Because the Fund's annual  expenses for
the  six-month  period ended  January 31, 1999  exceeded  .50%,  the Manager has
waived a portion of its management  fee to reduce the Fund's annual  expenses to
 .50%.

B.  Transfer agent's fees - USAA Transfer Agency Company, d/b/a USAA Shareholder
Account Services, an affiliate of the Manager,  provides transfer agent services
to the Fund based on an annual  charge of $28.50 per  shareholder  account  plus
out-of-pocket expenses.

C.  Underwriting  services - The Manager  provides  exclusive  underwriting  and
distribution  of the Fund's  shares on a  continuing  best  efforts  basis.  The
Manager receives no commissions or fees for this service.


(6) TRANSACTIONS WITH AFFILIATES
USAA Investment Management Company is indirectly wholly owned by United Services
Automobile  Association  (the  Association),   a  large,  diversified  financial
services  institution.  At January 31, 1999, the  Association and its affiliates
owned .8 million shares (3.5%) of the Fund.

Certain directors and officers of the Fund are also directors,  officers, and/or
employees  of the Manager.  None of the  affiliated  directors or Fund  officers
received compensation from the Fund.


(7) YEAR 2000
Like other mutual  funds,  the Fund could be adversely  affected if the computer
systems used by the Manager and the Fund's other service  providers are not able
to perform  their  intended  functions  effectively  after  1999  because of the
inability of computer  software to distinguish the year 2000 from the year 1900.
The Manager is taking  steps to address  this  potential  year 2000 problem with
respect  to the  computer  systems  that  they  use and to  obtain  satisfactory
assurances  that  comparable  steps are being  taken by the Fund's  other  major
service providers.  At this time, however,  there can be no assurance that these
steps  will be  sufficient  to avoid  any  adverse  impact to the Fund from this
problem.


<TABLE>

(8) FINANCIAL HIGHLIGHTS
Per share operating  performance for a share outstanding  throughout each period
is as follows:

<CAPTION>

                            Six-month                                                        Ten-month
                           Period Ended                                                    Period Ended
                            January 31,                  Year ended July 31,                  July 31,
                           ----------------------------------------------------------------------------
                               1999        1998         1997         1996         1995          1994
                           ----------------------------------------------------------------------------
<S>                        <C>          <C>          <C>          <C>           <C>          <C> 
Net asset value at
   beginning of period     $   9.99     $  10.03     $   9.79     $   9.87      $   9.74     $  10.08
Net investment income           .29          .62          .61          .62           .61          .37
Net realized and
   unrealized gain (loss)      (.09)        (.04)         .25         (.08)          .13         (.33)
Distributions from
   net investment income       (.29)        (.62)        (.61)        (.62)         (.61)        (.37)
Distributions of realized
   capital gains               (.02)         -           (.01)          -            -           (.01)
                           --------------------------------------------------------------------------
Net asset value at
   end of period           $   9.88     $   9.99     $  10.03     $   9.79      $   9.87     $   9.74
                           ==========================================================================
Total return (%)*              2.08         5.91         8.97         5.62          7.90          .39
Net assets at
   end of period (000)     $211,194     $181,171     $133,746     $101,032      $ 76,190     $ 48,228
Ratio of expenses to
   average net assets (%)       .50(a)       .50          .50          .50           .50          .50(a)
Ratio of expenses to average
   net assets excluding
   reimbursement (%)            .55(a)       .56          .61          .66           .74          .87(a)
Ratio of net investment
   income to average
   net assets (%)              5.81(a)      6.16         6.14         6.29          6.34         4.51(a)
Portfolio turnover (%)         3.97        48.24        27.85        66.81        103.02       142.08

  * Assumes reinvestment of all dividend income and capital gain distributions
    during the period.
(a) Annualized. The ratio is not necessarily indicative of 12 months of 
    operations.

</TABLE>





DIRECTORS
Robert G. Davis, Chairman of the Board
Michael J.C. Roth, President and Vice Chairman of the Board
John W. Saunders, Jr., Vice President
Barbara B. Dreeben
Howard L. Freeman, Jr.
Robert L. Mason
Richard A. Zucker

INVESTMENT ADVISER, UNDERWRITER AND DISTRIBUTOR
USAA Investment Management Company
9800 Fredericksburg Road
San Antonio, Texas 78288

TRANSFER AGENT
USAA Shareholder Account Services
9800 Fredericksburg Road
San Antonio, Texas 78288

CUSTODIAN
State Street Bank and Trust Company
P.O. Box 1713
Boston, Massachusetts 02105

LEGAL COUNSEL
Goodwin, Procter & Hoar LLP
Exchange Place
Boston, Massachusetts 02109

INDEPENDENT AUDITORS
KPMG Peat Marwick LLP
112 East Pecan, Suite 2400
San Antonio, Texas 78205

Telephone Assistance Hours
Call toll free - Central Time
Monday - Friday 7:30 a.m. to 8:00 p.m.
Saturdays 8:30 a.m. to 5:00 p.m.

For Additional Information On Mutual Funds
1-800-531-8181, (in San Antonio) 456-7211
For account servicing, exchanges or redemptions
1-800-531-8448, (in San Antonio) 456-7202

Recorded Mutual Fund Price Quotes
24-Hour Service (from any phone)
1-800-531-8066, (in San Antonio) 498-8066

Mutual Fund USAA TouchLine(Service Mark)
(from Touchtone phones only)
For account balance, last transaction or fund prices
1-800-531-8777, (in San Antonio) 498-8777









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