USAA MUTUAL FUND INC
N-30D, 1998-09-28
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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:
         Distributions to Shareholders                  8
         Independent Auditors' Report                   9
         Categories and Definitions                    10
         Portfolio of Investments                      11
         Notes to Portfolio of Investments             16
         Statement of Assets and Liabilities           17
         Statement of Operations                       18
         Statements of Changes in Net Assets           19
         Notes to Financial Statements                 20


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)1998, 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 neither  insured nor  guaranteed by
     the U.S.  Government,  and there is no assurance that any of the funds will
     be able to maintain a stable net asset value of $1 per share.

(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 IMCO,  including  charges and expenses,  please call  1-800-531-8181  for a
prospectus. Read it carefully before you invest.








Message from the President

On June 14, 1998, my wife attended a baby shower given for her daughter, Andrea.
That evening, in addition to many nice gifts, Andrea had another surprise, a new
baby boy,  James Kade  Broyles.  James was our fourth  grandchild  to receive an
Investart(Registered  Trademark)  account.  His  account is in the USAA Growth &
Income  Fund.  These  accounts  point up at this  time  some  things I have long
believed.

[Photograph of Michael J. C. Roth, CFA, President and Vice Chairman of the Board
appears here]

Shortly  after we opened  James'  account,  the stock  market  began to feel the
effects  of  long-simmering  problems.  There  was the Asian  crisis,  Russia in
turmoil,  a worsening trade deficit,  and very high stock valuations.  Suddenly,
the mood  changed.  There were several days of market drops well over 100 points
on the Dow. The August 8 edition of The Economist has a picture of a bear on the
cover  under the  caption  "Grin and bear it." So, how do we feel about the four
InveStart accounts? We feel just fine!

The reason is that we have a match between our objective and our risk tolerance.
These  accounts  are aimed at events 15 to 17 years from now,  college  for four
grandchildren.  We are  certain  that  between  then and now,  the  market  will
fluctuate.  I think we're better off to keep adding to the  InveStart  accounts,
because I believe the risk and potential reward are in harmony.

Whatever  your  investment  situation,  I believe it is possible to achieve this
kind of match  between  risk and  potential  reward  that can help you with your
investment program.

Sincerely,

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


Past performance is no guarantee of future results.

A  systematic  plan,  such as  Investart,  does not  assure a profit or  protect
against loss in declining markets.

For more  information  about mutual funds managed and  distributed by USAA IMCO,
including charges and expenses, please call for a prospectus.  Read it carefully
before investing.







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.

- --------------------------------------------------------------------------------
                                           7/31/97              7/31/98
- --------------------------------------------------------------------------------
  Net Assets                            $133.7 Million       $181.2 Million
  Net Asset Value Per Share                 $10.03                $9.99
- --------------------------------------------------------------------------------


- --------------------------------------------------------------------------------
AVERAGE ANNUAL TOTAL RETURNS AS OF 7/31/98
- --------------------------------------------------------------------------------
      1 Year               5 Years              Since Inception on 6/1/93
       5.91%                5.99%                         5.97%
- --------------------------------------------------------------------------------

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 Lipper
Short  Investment  Grade Debt Funds  Average,  and the Lehman  Brothers 1-3 Year
Government/Corporation  Index for the period of 06/01/93 through  07/31/98.  The
data points from the graph are as follows:


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

06/01/93      $10,000                    $10,000                   $10,000
06/30/93       10,073                     10,076                    10,076
12/31/93       10,285                     10,311                    10,285
06/30/94       10,177                     10,235                    10,236
12/31/94       10,287                     10,336                    10,342
06/30/95       11,032                     10,955                    11,033
12/31/95       11,438                     11,390                    11,476
06/30/96       11,640                     11,535                    11,645
12/31/96       12,160                     11,958                    12,066
06/30/97       12,537                     12,298                    12,416
12/31/97       13,031                     12,707                    12,870
06/30/98       13,438                     13,068                    13,259
07/31/98       13,494                     13,124                    13,321

Data from 6/1/93 through 7/31/98

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
Since  the  last  report,  long-term  interest  rates  (10  through  30 years to
maturity) have fallen. Investors believe that the rate of inflation, the primary
determinant  of the  general  level of  interest  rates,  will  continue to move
downward over time.  However,  short-term  rates (1 through 5 years to maturity)
have not fallen due to the Federal  Reserve keeping  overnight rates  unchanged.
Lack of action from the Federal  Reserve is due in part to the fear that current
tight labor  markets  could cause labor costs to increase and revive  inflation.
The unknown trump card is Asia. Going forward,  the level of interest rates will
be  impacted  by how  significantly  the Asian  economic  downturn  affects  our
economy.

PORTFOLIO STRATEGIES
As I have said in previous annual and semiannual  reports,  I do not try to time
the markets  because no one has  consistently  been successful in predicting the
course of interest  rates over time.  The other reason is that for  fixed-income
securities,  the primary  component of your total return  should be derived from
the income that you receive, not from changes in the net asset value.

As shown in the table on the next page,  dividend returns for the Fund have been
the dominant  component of the respective  total returns.  This assumes that you
reinvest 100% of your dividends.

                     Average Annual Compounded Returns with
            Reinvestment of Dividends - Periods Ending July 31, 1998
- --------------------------------------------------------------------------------
                       TOTAL               DIVIDEND               PRICE
                      RETURN     EQUALS     RETURN     PLUS      CHANGE
- --------------------------------------------------------------------------------
        Since 6/1/93   5.97%        =        5.96%       +        0.01%
        5 Years        5.99%        =        6.02%       +       -0.03%
        3 Years        6.82%        =        6.40%       +        0.42%
        1 Year         5.91%        =        6.31%       +       -0.40%
- --------------------------------------------------------------------------------




ANNUAL TOTAL RETURNS AND COMPOUNDED DIVIDEND RETURNS

A chart in the form of a bar graph appears here,  illustrating  the Annual Total
Returns and  Compounded Dividend Returns of  the USAA  Short-Term  Bond Fund for
the years ended July 31, 1998.

Total Return for years ended:
- -------------------------------------------------------------------------------

7/31/93   .87% * 
7/31/94  1.71%  
7/31/95  7.90% 
7/31/96  5.62% 
7/31/97  8.97% 
7/31/98  5.91%


**Compounded Dividend Yield for years ended:
- --------------------------------------------------------------------------------

7/31/93   .67% * 
7/31/94  4.40%  
7/31/95  6.57% 
7/31/96  6.43% 
7/31/97  6.47% 
7/31/98  6.31%


Change in Share Price:
- --------------------------------------------------------------------------------

7/31/93    .20% *
7/31/94  -2.69%
7/31/95   1.33%
7/31/96  -0.81%
7/31/97   2.50%
7/31/98  -0.40%

* Since inception on 6/1/93

**Compounded Dividend yield calculation includes only income distributions.


Total  return   equals  income  return  plus  share  price  change  and  assumes
reinvestment of all dividends and capital gain distributions. Dividend return is
the income  dividends  received  over the period  assuming  reinvestment  of all
dividends.  Share price  change is the change in net asset value over the period
adjusted for capital gain  distributions.  No adjustment has been made for taxes
payable  by  shareholders  on  their  reinvested   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.


You will not see dramatic  changes in the bond maturities in the portfolio in an
attempt to time the market.  My emphasis  continues to be looking for bonds that
represent value in terms of risk and total return. The other side of that search
is selling  securities in the portfolio that no longer  represent  value.  While
there are no hard and fast rules as to what value means, I feel that the primary
components of value are yield,  credit  quality,  structure  (maturity,  coupon,
redemption features) and liquidity.


For the 1-, 3-, and 5-year  periods  ending July 31,  1998,  your  Fund's  total
return of 5.91%, 6.82% and 5.99% ranked 29 out of 103, 8 out of 81, and 7 out of
50,   respectively  by  Lipper,   in  the  Short  Investment  Grade  Debt  Funds
category.(1) As you can see, the philosophy of maximizing  income and not trying
to time the market has worked very well.(2) I must also credit our seasoned team
of fixed income analysts for helping to identify  improving  credits and sectors
and to avoid problem situations.

(1) Lipper Anaytical Services, Inc. is an independent organization that monitors
    the performance of mutual funds. Rankings are based on total return.
(2) Past performance is no guarantee of future results.


PORTFOLIO MIX

A pie chart is shown here depicting the Portfolio Mix as of July 31, 1998 of the
USAA Short-Term Bond Fund to be:

Fixed Rate  Instruments  - 67.4%*;  Variable  Rate  Demand  Notes - 27.1%*;  and
Commercial Paper - 5.4%*.

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


See page 11 for a complete listing of the Portfolio of Investments.







Distributions to Shareholders

The  following  per share  information  describes  the federal tax  treatment of
distributions made during the fiscal year ended July 31, 1998. These figures are
provided for  information  purposes only and should not be used for reporting to
federal or state revenue  agencies.  Distributions for the calendar year will be
reported to you on Form 1099-DIV in January 1999.



                     Ordinary income                $.6153*
                                                    =======   

* Includes  distribution of short-term  capital gains, if any, which are taxable
as ordinary income.







Independent Auditors' Report

The Shareholders and Board of Directors

USAA SHORT-TERM BOND FUND:
We have audited the accompanying statement of assets and liabilities,  including
the portfolio of  investments of the USAA  Short-Term  Bond Fund, a portfolio of
USAA  Mutual  Fund,  Inc.,  as of July 31,  1998 and the  related  statement  of
operations for the year then ended,  the statements of changes in net assets for
each of the years in the two-year period then ended,  and financial  highlights,
presented  in note 7 to the  financial  statements,  for  each of the  years  or
periods in the  five-year  period then ended.  These  financial  statements  and
financial  highlights are the  responsibility of the Company's  management.  Our
responsibility  is to  express  an opinion  on these  financial  statements  and
financial highlights based on our audits.

We  conducted  our  audits  in  accordance  with  generally   accepted  auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable  assurance  about  whether the  financial  statements  and  financial
highlights are free of material misstatement.  An audit includes examining, on a
test basis,  evidence  supporting  the amounts and  disclosures in the financial
statements and financial  highlights.  Our procedures  included  confirmation of
securities owned as of July 31, 1998, by  correspondence  with the custodian and
brokers.  An audit also includes  assessing the accounting  principles  used and
significant  estimates  made by  management,  as well as evaluating  the overall
financial  statement  presentation.   We  believe  that  our  audits  provide  a
reasonable basis for our opinion.

In our opinion,  the financial  statements and financial  highlights referred to
above present fairly, in all material  respects,  the financial  position of the
USAA Short-Term Bond Fund as of July 31, 1998, the results of its operations for
the year then ended,  the changes in its net assets for each of the years in the
two-year period then ended,  and the financial  highlights for each of the years
or periods in the  five-year  period then ended,  in conformity  with  generally
accepted accounting principles.

                                        KPMG Peat Marwick LLP

San Antonio, Texas
September 4, 1998










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

July 31, 1998

Fixed  Rate  Instruments  - consist  of bonds and notes.  The  interest  rate is
constant to maturity.  Prior to maturity,  the 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  for 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. The VRDN's effective maturity is
the next put date. Most VRDNs possess a credit enhancement.

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

Credit  Enhancement  (CRE) - adds 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.  Typically,  the  rating  agencies
evaluate  the  security  based upon the credit  standing of the  provider of the
credit enhancement, rather than the credit standing of the issuer.


PORTFOLIO DESCRIPTION ABBREVIATIONS
     COP    Certificate of Participation
     DEB    Debentures
     IDA    Industrial Development Authority/Agency
     IDB    Industrial Development Board
     MFH    Multi-Family Housing
     MTN    Medium-Term Note
     RB     Revenue Bond







USAA SHORT-TERM BOND FUND
PORTFOLIO OF INVESTMENTS
(IN THOUSANDS)

July 31, 1998

<TABLE>
<CAPTION>

 Principal                                                   Coupon                          Market
  Amount               Security                               Rate        Maturity            Value
- ------------------------------------------------------------------------------------------------------
<C>         <S>                                               <C>          <C>              <C>
                         FIXED RATE INSTRUMENTS (67.4%)
                             CORPORATE BONDS (40.5%)
            Banks - Major Regional
  $ 4,500   Corporacion Andina De Fomento, Global Bonds       7.38%        7/21/00          $ 4,589
                                                                                            ----------
            Finance - Consumer
    5,000   Capital One Bank, Bank Notes                      5.95         2/15/01            4,976
    3,000   Capital One Bank, Bank Notes                      6.15         6/01/01            2,998
                                                                                            ----------
                                                                                              7,974
                                                                                            ----------
            Home Furnishings & Appliances
    3,000   MacSaver Financial Services, Inc., Notes          7.40         2/15/02            2,928
                                                                                            ----------
            Real Estate Investment Trusts
    3,000   Developers Diversified Realty Corp.,
              Senior Notes                                    7.63         5/15/00            3,070
    5,000   Equity Operating L.P., Notes (a)                  6.38         2/15/02            5,021
    4,500   Franchise Finance Corp. of America,
              Senior Notes                                    7.00         11/30/00           4,562
    8,000   Glenborough Property, L.P., Senior Notes (a)      7.63         3/15/05            8,048
    7,000   HRPT Properties Trust, Senior Notes               6.70         2/23/05            6,963
    3,000   Nationwide Health Properties, Inc., MTN           8.61         3/01/02            3,203
    5,000   Oasis Residential, Inc., Notes                    6.75         11/15/01           5,067
    4,500   TriNet Corporate Realty Trust, Inc., Notes        7.30         5/15/01            4,606
                                                                                            ----------
                                                                                             40,540
                                                                                            ----------
            Retail - General Merchandising
    3,000   Dayton Hudson Corp., Notes                        5.95          6/15/00           3,002
    2,000   Kmart Corp., MTN                                  7.72          6/25/02           2,042
    2,000   Kmart Corp., MTN                                  7.76          7/01/02           2,044
                                                                                            ----------
                                                                                              7,088
                                                                                            ----------
            Telecommunications - Long Distance
    4,000   WorldCom, Inc., Senior Notes                      7.55          4/01/04           4,242
                                                                                            ----------
            Waste Management
    6,000   Waste Management, Inc., Notes                     6.38          12/01/03          6,010
                                                                                            ----------
              Total corporate bonds (cost: $72,329)                                          73,371
                                                                                            ----------
                         ASSET BACKED SECURITIES (8.3%)
    6,000   FirstPlus Home Loan Owner Trust,
              Series 1997-4, Class A-5                        6.62          9/10/15           6,080
    4,000   Firstplus Home Loan Owner Trust,
              Series 1998, Class A-2                          6.54          4/10/15           4,019
    5,000   Firstplus Home Loan Owner Trust,
              Series 1998, Class A-4                          6.24          2/10/14           4,998
                                                                                            ----------
              Total asset backed securities (cost $14,999)                                   15,097
                                                                                            ----------

                   COLLATERALIZED MORTGAGE OBLIGATIONS (18.6%)
    5,172   Federal Home Loan Mortgage Corp.,
              Series 1998-11 M                                9.00          2/18/24           5,524
    3,501   Federal Home Loan Mortgage Corp., 
              Series 1998-2 GA                                8.50          4/18/25           3,646
    6,741   Federal Home Loan Mortgage Corp.,
              Series 1998-7 H                                 9.00          3/18/25           7,203
    6,811   Federal National Mortgage Assn.,
              Series 1997-72 CA                               9.50          9/18/23           7,240
    3,787   Federal National Mortgage Assn.,
              Series 1997-79 U                                9.00          11/18/24          3,992
    5,733   Federal National Mortgage Assn.,
              Series 1997-89 N                                9.50          12/20/22          6,130
                                                                                            ----------
            Total collateralized mortgage obligations
              (cost: $34,386)                                                                33,735
                                                                                            ----------
            Total fixed rate instruments (cost: $121,714)                                   122,203
                                                                                            ----------

                       VARIABLE RATE DEMAND NOTES (27.1%)
            Appropriated Debt
    1,990   City of Gardena, CA, COP, Series 1995 (CRE)       6.50          7/01/25           1,990
                                                                                            ----------
            Buildings
    2,055   Goson, Notes, Series 1997 (CRE)                   5.77          11/01/17          2,055
    2,075   Montgomery, AL, IDB RB, Series 1996C (CRE)        5.80          7/01/16           2,075
    1,560   Scottsboro, AL, IDB RB, Series 1995 (CRE)         5.80          10/01/10          1,560
                                                                                            ----------
                                                                                              5,690
                                                                                            ----------
            Electrical Equipment
    2,960   APSCO, Inc., Notes, Series 1996 (CRE)             5.77          9/01/03           2,960
                                                                                            ----------
            Entertainment
    3,750   Denver, CO, Urban Renewal Auth. Tax
              Increment RB, Series 1992B (CRE)                5.76          9/01/11           3,750
                                                                                            ----------

            Finance - Diversified
      645   New Jersey Economic Development Auth.
              Bonds, Series 1996A2 (CRE)                      5.85           11/01/16           645
      600   New Jersey Economic Development Auth.
              Bonds, Series 1996D2 (CRE)                      5.85           11/01/06           600
                                                                                            ----------
                                                                                              1,245
                                                                                            ----------
            Heavy Duty Trucks & Parts
    2,680   Missouri Economic Development Export IDA
              RB, Series 1993B (CRE)                          5.70           6/01/08          2,680
                                                                                            ----------
            Leisure Time
    3,030   Greenville, SC, Memorial Auditorium District Public
              Facilities Corp., (CRE)                         5.75           9/01/08          3,030
                                                                                            ----------
            Lodging/Hotel
    2,540   Birmingham, AL, Historical Preservation Auth.
              Taxable RB, Series 1993 (CRE)                   6.19           5/01/18          2,540
    3,010   Rockside Road Properties, Notes,
              Series 1995 (CRE)                               5.72           7/01/10          3,010
                                                                                            ----------
                                                                                              5,550
                                                                                            ----------
            Multi-Family Housing
      155   Bartlett, IL, MFH RB, Series 1995 (CRE)           6.10           3/01/25            155
    5,900   Continental Valorem Corp., DEB,
              Series 1988 (CRE)                               6.05           6/01/13          5,900
                                                                                            ----------
                                                                                              6,055
                                                                                            ----------
            Nursing Care
    3,525   Grand Valley Atrium, Inc. Taxable RB (CRE)        5.71           6/01/18          3,525
                                                                                            ----------
            Real Estate - Other
    4,977   Erie Funding I, Notes (CRE)                       5.72           11/01/16         4,977
    4,000   Katz Capital Corp., Taxable Notes                 5.77           6/15/28          4,000
    2,200   Wynrose, Inc., Notes, Series 1995A (CRE)          5.80           11/01/05         2,200
                                                                                            ----------
                                                                                             11,177
                                                                                            ----------
            Miscellaneous
    1,425   Ontario Redevelopment Agency, CA, RB,
              Series B (CRE)                                  6.24           9/01/27          1,425
                                                                                            ----------
            Total variable rate demand notes (cost: $49,077)                                 49,077
                                                                                            ----------

                             CASH EQUIVALENTS (5.4%)
            Commercial Paper
    2,782   Houghton Mifflin Co.                              5.80           8/03/98          2,781
    7,000   Los Angeles County Metropolitan
              Transportation Auth. Notes                      6.20           8/06/98          7,000
                                                                                            ----------
            Total cash equivalents (cost: $9,781)                                             9,781
                                                                                            ----------
            Total investments (cost: $180,572)                                              $181,061
                                                                                            ==========

</TABLE>

                          Portfolio Summary By Industry

            Real Estate Investment Trusts                       22.4%
            Collateralized Mortgage Obligations                 18.6
            Asset Backed Securities                              8.3
            Real Estate - Other                                  6.2
            Finance Consumer                                     4.4
            Retail - General Merchandising                       3.9
            Sales Tax                                            3.9
            Multi-Family Housing                                 3.3
            Waste Management                                     3.3
            Buildings                                            3.2
            Lodging / Hotel                                      3.1
            Banks - Major Regional                               2.5
            Telecommunications - Long Distance                   2.3
            Entertainment                                        2.1
            Nursing Care                                         1.9
            Leisure Time                                         1.7
            Electrical Equipment                                 1.6
            Home Furnishings & Appliances                        1.6
            Publishing                                           1.5
            Heavy Duty Trucks & Parts                            1.5
            Appropriated Debt                                    1.1
            Other                                                1.5
                                                                -----   
                                                                99.9%
                                                                ===== 








USAA SHORT-TERM BOND FUND
NOTES TO PORTFOLIO OF INVESTMENTS

July 31, 1998


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.







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

July 31, 1998

ASSETS
   Investments in securities, at market value 
     (identified cost of $180,572)                                    $ 181,061
   Cash                                                                     190
   Receivables: 
      Capital shares sold                                                   296
      Interest                                                            1,992
                                                                      ----------
         Total assets                                                   183,539
                                                                      ----------
LIABILITIES
   Securities purchased                                                   1,200
   Capital shares redeemed                                                  955
   USAA Investment Management Company                                        29
   USAA Transfer Agency Company                                              24
   Accounts payable and accrued expenses                                     59
   Dividends on capital shares                                              101
                                                                      ----------
         Total liabilities                                                2,368
                                                                      ----------
            Net assets applicable to capital shares outstanding       $ 181,171
                                                                      ==========

REPRESENTED BY:
   Paid-in capital                                                    $ 180,248
   Accumulated net realized gain on investments                             434
   Net unrealized appreciation of investments                               489
                                                                      ----------
            Net assets applicable to capital shares outstanding       $ 181,171
                                                                      ==========
   Capital shares outstanding                                            18,131
                                                                      ==========
   Authorized shares of $.01 par value                                  120,000
                                                                      ==========
   Net asset value, redemption price, and offering price per share    $    9.99
                                                                      ==========

See accompanying notes to financial statements.









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

Year ended July 31, 1998


Net investment income:
   Interest income                                                     $ 10,250
                                                                      ==========
   Expenses:
      Management fees                                                       370
      Transfer agent's fees                                                 271
      Custodian's fees                                                       65
      Postage                                                                25
      Shareholder reporting fees                                             18
      Directors' fees                                                         4
      Registration fees                                                      65
      Professional fees                                                      37
      Other                                                                   4
                                                                      ----------
         Total expenses before reimbursement                                859
      Expenses reimbursed                                                   (91)
                                                                      ----------
         Total expenses after reimbursement                                 768
                                                                      ----------
            Net investment income                                         9,482
                                                                      ----------
Net realized and unrealized gain (loss) on investments:
   Net realized gain                                                        442
   Change in net unrealized appreciation/depreciation                      (936)
                                                                      ----------
            Net realized and unrealized loss                               (494)
                                                                      ----------
Increase in net assets resulting from operations                       $  8,988
                                                                      ==========


See accompanying notes to financial statements.









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

Years ended July 31,

                                                              1998        1997
                                                           ---------------------
From operations:
   Net investment income                                   $  9,482    $  7,099
   Net realized gain on investments                             442         410
   Change in net unrealized appreciation/depreciation of
      investments                                              (936)      2,464
                                                           ---------------------
      Increase in net assets resulting from operations        8,988       9,973
                                                           ---------------------
Distributions to shareholders from:
   Net investment income                                     (9,472)     (7,099)
                                                           ---------------------
   Net realized gains                                            --         (51)
                                                           ---------------------
From capital share transactions:
   Proceeds from shares sold                                105,161      75,807
   Shares issued for dividends reinvested                     8,269       6,140
   Cost of shares redeemed                                  (65,521)    (52,056)
                                                           ---------------------
      Increase in net assets from capital share
         transactions                                        47,909      29,891
                                                           ---------------------
Net increase in net assets                                   47,425      32,714
Net assets:
   Beginning of period                                      133,746     101,032
                                                           ---------------------
   End of period                                           $181,171    $133,746
                                                           =====================
Change in shares outstanding:
   Shares sold                                               10,515       7,655
   Shares issued for dividends reinvested                       827         620
   Shares redeemed                                           (6,550)     (5,259)
                                                           ---------------------
      Increase in shares outstanding                          4,792       3,016
                                                           =====================


See accompanying notes to financial statements.








USAA SHORT-TERM BOND FUND
NOTES TO FINANCIAL STATEMENTS

July 31, 1998


(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,  open-end  management  investment
company  incorporated  under the laws of  Maryland  consisting  of ten  separate
funds. The information presented in this annual report pertains only to the USAA
Short-Term Bond Fund (the Fund). The Fund's 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 Fund's
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.  As a result of certain
permanent  differences between book and tax basis accounting,  reclassifications
have  been  made  on  the  statement  of  assets  and  liabilities  to  increase
accumulated net realized gain on investments by $10,000 and decrease accumulated
undistributed net investment income by $10,000.

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 two joint short-term  revolving
loan  agreements  totaling  $850  million,  one with  USAA  Capital  Corporation
(CAPCO),  an affiliate of the Manager ($750 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 its agreement 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  agreement,  does not exceed 25% of the Fund's total
assets at NationsBank's borrowing rate plus a markup. The Fund had no borrowings
under either of these agreements during the year ended July 31, 1998.


(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 year  ended  July 31,  1998 were  $85.1  million  and $50.4
million, respectively.

Gross  unrealized  appreciation  and  depreciation of investments as of July 31,
1998 was $1,226,000 and $737,000, respectively.


(5) TRANSACTIONS WITH MANAGER
A. Management  fees - The investment  policies of the Fund and management of the
Fund's  portfolio are carried out by USAA  Investment  Management  Company.  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 year ended July 31, 1998 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 $26 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
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) FINANCIAL HIGHLIGHTS
Per share operating  performance for a share outstanding  throughout each period
is as follows:

<TABLE>
<CAPTION>
                                                                                 Ten-Month
                                                                                Period Ended
                                            Year Ended July 31,                   July 31,
                             ------------------------------------------------------------------
                                   1998        1997        1996        1995        1994
                             ------------------------------------------------------------------
<S>                             <C>          <C>         <C>          <C>         <C>
Net asset value at
   beginning of period          $  10.03     $   9.79     $  9.87      $  9.74     $  10.08
Net investment income                .62          .61         .62          .61          .37
Net realized and
   unrealized gain (loss)           (.04)         .25        (.08)         .13         (.33)
Distributions from net
   investment income                (.62)        (.61)       (.62)        (.61)        (.37)
Distributions of realized
   capital gains                      --         (.01)         --           --         (.01)
                             ------------------------------------------------------------------
Net asset value at
   end of period               $    9.99     $  10.03     $  9.79       $ 9.87     $   9.74
                             ==================================================================
Total return (%) *                  5.91         8.97        5.62         7.90         0.39
Net assets at
   end of period (000)         $ 181,171     $133,746     $101,032     $76,190     $ 48,228
Ratio of expenses to
   average net assets (%)           .50           .50         .50          .50          .50(a)
Ratio of expenses to average
   net assets excluding
   reimbursement (%)                .56           .61         .66          .74          .87(a)
Ratio of net investment
   income to 
   average net assets (%)          6.16          6.14        6.29         6.34         4.51(a)
Portfolio turnover (%)            48.24         27.85       66.81       103.02       142.08

</TABLE>

*  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.









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 8:00 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 TouchLine(Registered Trademark)
(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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