SECURITY CASH FUND
N-30D, 1998-03-11
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SECURITY FUNDS
ANNUAL REPORT
December 31, 1997

o Security Income Fund

  - Corporate Bond Series

  - U.S. Government Series

  - Limited Maturity Bond Series

  - High Yield Series

o Security Tax-Exempt Fund

o Security Cash Fund

[SECURITY DISTRIBUTORS LOGO]
Security Distributors, Inc.
A Member of The Security Benefit
Group of Companies
<PAGE>
SECURITY FUNDS

President's Letter
February 15, 1998

To Our Shareholders:

1997 produced a roller coaster ride for investors in fixed income instruments.
The year began with the thirty-year Treasury bond yielding 6.64%. It traded up
to 7.14% in April, and spent a good part of the year in a range between 6.40%
and 6.80% before beginning a sharp decline in the fourth quarter. The long bond
ended the year at 5.92%, very close to the 5.77% record low since the government
began regular sales of thirty-year bonds in 1977.

The performance of our fixed income portfolios was excellent in 1997. Total
returns ranged from 12.56% on the High Yield Series to 8.97% on the
Intermediate-term Limited Maturity Bond Series, well in line with their peers
and benchmark indexes.(1)

CONTRIBUTORS TO THE RATE DECLINE

The chief economic component behind the decline in interest rates late in the
year we believe was the ultimate recognition that inflation has at long last
been brought under control. This was a result of a combination of the enormously
competitive global economic environment and the extremely astute monetary policy
of our central bank under the direction of Alan Greenspan, as well as that of
other central bankers around the world.

Perhaps the greatest recent influence on the U.S. inflation picture has been and
continues to be the weakened economic conditions in the southeast Asian
countries. As sales decline in their home markets, these countries are
increasing their efforts to export goods to European and American buyers, often
at reduced prices. This price competition makes it necessary for U.S.
manufacturers to drop their price levels in order to remain competitive.
Although the situation may be unpleasant for residents of the Asian countries,
the resulting low inflation rates should benefit our bond markets.

A LOOK INTO THE YEAR AHEAD

Our fixed income portfolios are now being managed by two members of our very
capable fixed income team. Steven Bowser, who has worked with Security Benefit
Group's general account portfolio for the past five years, is overseeing the
investment-grade portions of the portfolio. David Eshnaur, who joined the
Security Management group of investment professionals in 1997, is working with
the high yield issues. In addition, our expanded team of research analysts lend
support to the two managers with their work.

We expect the positive environment for fixed income investors to continue into
1998. The still favorable inflation picture and a continuation of the "flight to
quality" as a result of the uncertain international environment brought about by
problems in southeast Asia give us the prospect of long term interest rates
trading close to the 5.50% level as measured by the thirty-year government bond.
We also believe that there is a reasonable prospect for the Federal Reserve Bank
to reduce short term interest rates, depending on how severe the global economic
problems triggered by the Asian crisis turn out to be.

As always, we appreciate your continuing investments in Security products. We
invite your comments and questions at any time.

/s/ JOHN CLELAND

John Cleland, President
The Security Funds

                                       1
<PAGE>
Manager's Commentary
February 15, 1998

SECURITY INCOME FUND
Corporate Bond Series

The Corporate Bond Series of Security Income Fund completed a successful year in
1997, generating a total return of 9.63% compared with its Lipper peer group
average of 9.17%, and finishing the year in the top quartile of its peer
group.(1) These returns are slightly lower than the benchmark Lehman Brothers
Corporate Bond Index, however, which generated a 10.23% total return for the
year.

RESTRUCTURING STEPS IN 1997

After a disappointing first quarter, we took steps to restructure the portfolio
with an overall emphasis on spreading the risk by sector and by size of
individual holdings. The average quality in the high yield portion of the Series
was upgraded, and issues providing a yield premium over Treasury bonds were
sought.

During the fall months, yield spreads between Treasuries and corporate bond
issues tightened considerably, reducing the attractiveness of corporates. When
the reward for accepting a lower quality was minimal, we chose to buy Treasury
issues instead. This helped overall performance in the fourth quarter, when
Treasury bond prices increased dramatically as investors moved funds from Asian
countries in a "flight to quality."

CURRENT PORTFOLIO STRUCTURE

We were fortunate to have eliminated our Asian exposure in mid-summer, selling
such "Yankee bond" issues as Petronas, Bangkok Bank, and Malayan Bank before the
Asian markets met disaster. (Yankee bonds are issued by foreign corporations,
but denominated in dollars for U.S. investors.) We also sold issues in the
troubled hospital care sector. We broadened our high yield position, emphasizing
the better quality issues, in order to gain additional yield.

At the end of 1997 the portfolio consisted of 41% investment grade corporate
bonds, 21% high yield issues, 13% Yankee bonds, 8% Treasuries, and 16%
mortgage-backed securities, with the remaining 1% in cash. At year-end the
average duration of the Series was 5.9 years, with an overall mid-A credit
quality average. Our target is to have no more than 2% of the assets invested in
any one company, with high yield issues being 1% or less per name.

PLANS FOR THE YEAR AHEAD

We believe this formula of diversification by sector and security will serve us
well in the volatile investment climate we expect in 1998. We will continue to
look for areas in which we can upgrade credit quality and increase yield. If
interest rates begin to reverse direction and move up, we will keep our
portfolio average duration close to that of the benchmark index in order to
reduce volatility. Our sizeable position in very liquid U.S. Treasury issues
allows us to adjust quickly to changes in economic conditions.

We will continue to use the talents of our expanded analytical team to add value
in the portfolio holdings. At this particular stage in the economic cycle, it is
important to excel in individual security selection in order to compete with
one's peers.

Steven M. Bowser
Portfolio Manager

(1)  Performance figures are based on Class A shares and do not reflect
     deduction of the sales charge.

                                       2
<PAGE>
Manager's Commentary
February 15, 1998

                             CORPORATE BOND SERIES

                [LINEAR GRAPH PLOTTED FROM POINTS IN TABLE BELOW]

                                  Security Funds         Lehman Brothers 
   Date                        Corporate Bond Fund    Corporate Bond Index
- ----------                     -------------------    --------------------
12/31/1987 ..................      $ 10,000.00           $ 10,000
03/31/1988 ..................         9,750.05             10,444
06/30/1988 ..................         9,806.18             10,560
09/30/1988 ..................        10,003.23             10,809
12/31/1988 ..................        10,138.40             10,922
03/31/1989 ..................        10,250.72             11,053
06/30/1989 ..................        10,855.21             11,928
09/30/1989 ..................        10,888.25             12,084
12/31/1989 ..................        11,149.08             12,461
03/31/1990 ..................        11,158.35             12,352
06/30/1990 ..................        11,564.12             12,834
09/30/1990 ..................        11,375.15             12,831
12/31/1990 ..................        11,880.80             13,340
03/31/1991 ..................        12,332.65             13,909
06/30/1991 ..................        12,557.54             14,186
09/30/1991 ..................        13,204.99             15,019
12/31/1991 ..................        13,796.96             15,811
03/31/1992 ..................        13,756.13             15,695
06/30/1992 ..................        14,268.15             16,377
09/30/1992 ..................        14,855.21             17,150
12/31/1992 ..................        15,031.61             17,184
03/31/1993 ..................        15,954.38             18,052
06/30/1993 ..................        16,544.71             18,655
09/30/1993 ..................        17,270.94             19,304
12/31/1993 ..................        17,092.50             19,275
03/31/1994 ..................        16,206.18             18,596
06/30/1994 ..................        15,638.30             18,303
09/30/1994 ..................        15,589.88             18,438
12/31/1994 ..................        15,679.69             18,518
03/31/1995 ..................        16,421.91             19,615
06/30/1995 ..................        17,292.80             21,074
09/30/1995 ..................        17,621.80             21,570
12/31/1995 ..................        18,537.60             22,636
03/31/1996 ..................        17,871.59             22,052
06/30/1996 ..................        17,863.27             22,150
09/30/1996 ..................        18,250.02             22,592
12/31/1996 ..................        18,440.79             23,379
03/31/1997 ..................        18,233.72             23,143
06/30/1997 ..................        18,874.89             24,098
09/30/1997 ..................        19,629.42             25,041
12/31/1997 ..................        20,219.41             25,771

                             $10,000 OVER TEN YEARS

This chart assumes a $10,000 investment in Class A shares of Corporate Bond
Series on December 31, 1987, and reflects deduction of the 4.75% sales load. On
December 31, 1997, the value of your investment in the Series' Class A shares
(with dividends reinvested) would have grown to $20,219. By comparison, the same
$10,000 investment would have grown to $25,771 based on the performance of the
Lehman Brothers Corporate Bond Index.

The performance illustrated above is based on the performance of Class A shares.
The performance of Class B shares will be greater or less than the performance
shown for Class A shares as a result of the different loads and fees associated
with an investment in Class B shares.

The performance data illustrated above reflects past performance which is not
predictive of future results.

Investments cannot be made directly in an index. The Lehman Brothers Corporate
Bond Index includes all corporate debt securities rated A or higher.

                             CORPORATE BOND SERIES
                          AVERAGE ANNUAL TOTAL RETURN
                            AS OF DECEMBER 31, 1997

                 Class A Shares                  Class B Shares
            ----------------------      -----------------------------
            1 Year           4.47%      1 Year                  3.74%
            5 Years          5.10%      Since Inception         1.85%
            10 Years         7.30%      (10-19-93)
   
The performance data above represents past performance which is not predictive
of future results. For Class A shares these figures reflect deduction of the
maximum sales charge of 4.75%. For Class B shares the figures reflect deduction
of the maximum contingent deferred sales charge, ranging from 5% in the first
year to 0% in the sixth and following years. The investment return and principal
value of an investment will fluctuate so that an investor's shares, when
redeemed, may be worth more or less than their original cost.

                                       3
<PAGE>
Manager's Commentary
February 15, 1998

U.S. GOVERNMENT SERIES

The U.S. Government Series of Security Income Fund returned an attractive 9.19%
in the year just completed.(1) This compared very favorably with the average
8.84% return of its Lipper peers, placing the fund in the top third of the
group. The total return lagged slightly the 9.59% return of the benchmark Lehman
Government Bond Index over the period.

FACTORS CONTRIBUTING TO OVERALL PERFORMANCE

As interest rates declined during the second half of 1997 we reduced slightly
our holdings in mortgage-backed securities. In times of falling interest rates,
concerns that homeowners will refinance or prepay their mortgages tends to hold
back returns on these types of bonds. The proceeds from the sales were for the
most part used to purchase federal agency securities, which yielded more than
Treasury issues of similar maturities.

PORTFOLIO COMPOSITION AT YEAR END

The sector weightings in the portfolio at the end of the year consisted of 43%
federal agency issues, 23% Treasury securities, 33% mortgage-backed bonds, and
about 1% in cash. Although the spread between yields on Treasury bonds and
agency securities were narrow at times during the year, (perhaps reducing the
attractiveness of agency issues) any incremental advantage in yield helps
competitive position based on total return in an all government securities
portfolio.

The portfolio's duration at the close of 1997 was 5.2 years, slightly longer
than the 5.1 year duration of the benchmark index. As interest rates declined
through the second half of the year, we extended duration from the 4.85 year
level at the end of June because longer-maturity bonds generally reap greater
benefits from a drop in yields. The average coupon in the portfolio was 8.01%
versus the benchmark index average 6.92%, primarily because of the greater
representation of mortgage-backed bonds bearing higher coupons.

PLANS FOR THE COMING YEAR

The U.S. Government Series is a high-quality portfolio designed for more
conservative investors. Because of this, we avoid trying to outguess the markets
by dramatically lengthening or shortening the duration of portfolio holdings.
While we make modest adjustments to take advantage of current conditions, as a
general rule we track the characteristics of the benchmark index fairly closely.
We do not anticipate any dramatic change in sector weightings in coming months,
but will monitor the bond markets carefully in an effort to continue to provide
attractive, competitive returns to our shareholders.

Steven M. Bowser
Portfolio Manager

(1)  Performance figures are based on Class A shares and do not reflect
     deduction of the sales charge. The Investment Manager waived its advisory
     fee for the fiscal year ended December 31, 1997 and in the absence of such
     waiver, the performance quoted would be reduced.

     Although the securities purchased by the U.S. Government Series are
     guaranteed as to the timely payment of principal and interest by the U.S.
     Government, its agencies or instrumentalities, the shares of the series
     itself are not so guaranteed.
 
                                        4
<PAGE>
Manager's Commentary 
February 15, 1998

                             U.S. GOVERNMENT SERIES
                                    12-31-97

                [LINEAR GRAPH PLOTTED FROM POINTS IN TABLE BELOW]

                                                     Lehman 
                                                    Brothers
                                      U.S.           Gov't. 
                                   Government         Bond
                                     Series           Index
                                   ----------      ----------
12/31/1997 ..................      $10,000.00      $10,000.00
03/31/1988 ..................        9,753.16       10,117.69
06/30/1988 ..................        9,911.93        9,941.33
09/30/1988 ..................       10,068.06        9,673.52
12/31/1988 ..................       10,118.03       10,219.24
03/31/1989 ..................       10,223.76       10,556.47
06/30/1989 ..................       10,810.68       10,656.38
09/30/1989 ..................       10,952.93       10,836.28
12/31/1989 ..................       11,313.27       10,938.28
03/31/1990 ..................       11,304.13       11,054.50
06/30/1990 ..................       11,691.71       11,943.56
09/30/1990 ..................       11,842.91       12,042.24
12/31/1990 ..................       12,421.69       12,495.17
03/31/1991 ..................       12,731.06       12,339.91
06/30/1991 ..................       12,944.86       12,771.22
09/30/1991 ..................       13,560.06       12,877.35
12/31/1991 ..................       14,135.00       13,585.14
03/31/1992 ..................       13,960.43       13,879.19
06/30/1992 ..................       14,370.52       14,066.86
09/30/1992 ..................       14,684.87       14,870.35
12/31/1992 ..................       14,832.73       15,667.87
03/31/1993 ..................       15,517.12       15,393.80
06/30/1993 ..................       16,110.77       16,002.98
09/30/1993 ..................       16,643.01       16,792.31
12/31/1993 ..................       16,573.48       16,799.94
03/31/1994 ..................       15,9~3.68       17,558.69
06/30/1994 ..................       15,539.81       18,066.80
09/30/1994 ..................       15,424.29       18,652.97
12/31/1994 ..................       15,488.87       18,590.11
03/31/1995 ..................       16,169.74       18,030.26
06/30/1995 ..................       17,357.83       17,823.48
09/30/1995 ..................       17,853.25       17,899.08
12/31/1995 ..................       18,874.24       17,963.26
03/31/1996 ..................       18,247.54       18,808.53
06/30/1996 ..................       18,268.00       19,975.47
09/30/1996 ..................       18,631.75       20,327.70
12/31/1996 ..................       19,112.58       21,256.22
03/31/1997 ..................       18,969.03       20,775.73
06/30/1997 ..................       19,583.89       20,873.51
09/30/1997 ..................       20,266.46       21,226.26
12/31/1997 ..................       20,871.51       21,845.58
                                                   
                             $10,000 OVER TEN YEARS

This chart assumes a $10,000 investment in Class A shares of U.S. Government
Series on December 31, 1987, and reflects deduction of the 4.75% sales load. On
December 31, 1997, the value of your investment in the Series' Class A shares
(with dividends reinvested) would have grown to $20,872. By comparison, the same
$10,000 investment would have grown to $23,424 based on the performance of the
Lehman Brothers Government Bond Index. 

The performance illustrated above is based on the performance of Class A shares.
The performance of Class B shares will be greater or less than the performance
shown for Class A shares as a result of the different loads and fees associated
with an investment in Class B shares.

The performance data illustrated above reflects past performance which is not
predictive of future results.

The Lehman Brothers Government Bond Index is made up of all public obligations
of the U.S. Treasury, excluding flower bonds and foreign-targeted issues, all
publicly issued debt of U.S. Government agencies and quasi-federal corporations,
and corporate debt guaranteed by the U.S. Government. Investments cannot be made
directly in an index.

                             U.S. GOVERNMENT SERIES
                          AVERAGE ANNUAL TOTAL RETURN
                            AS OF DECEMBER 31, 1997

              CLASS A SHARES               CLASS B SHARES              
              --------------               --------------
              1 Year..........  4.12%      1 Year...........  2.86%
              5 Years.........  6.04%      Since Inception..  3.38%
              10 Years........  7.64%        (10-19-93)

The performance data above represents past performance which is not predictive
of future results. For Class A shares these figures reflect deduction of the
maximum sales charge of 4.75%. For Class B shares the figures reflect deduction
of the maximum contingent deferred sales charge, ranging from 5% in the first
year to 0% in the sixth and following years. The Investment Manager waived its
advisory fee for the fiscal year ended December 31, 1997 and in the absence of
such waiver, the performance quoted would be reduced. The investment return and
principal value of an investment will fluctuate so that an investor's shares,
when redeemed, may be worth more or less than their original cost.

                                       5
<PAGE>
Manager's Commentary
February 15, 1998

LIMITED MATURITY BOND SERIES

The Limited Maturity Bond Series completed 1997 with a strong performance,
returning 8.96% for the year compared with its Lipper peer group average of
8.57%.(1) This placed the Series in the top third of its peer group. The return
also is favorable when viewed against its benchmark, the Lehman Brothers
Intermediate Corporate Bond Index, which gained 8.36% in 1997.

PORTFOLIO CHANGES DURING THE YEAR

The overall theme in portfolio adjustments throughout the year was one of
upgrading average credit quality and lessening risk exposure by reducing the
block size of the bonds. The Yankee bond holdings (bonds issued by foreign
corporations, but denominated in dollars for U.S. investors) selected for the
portfolio are also confined to the higher-quality names with good liquidity,
since obtaining current financial information on foreign corporations can be
more difficult than with domestic companies.

CONTRIBUTORS TO TOTAL RETURN

A strong contributor to the portfolio's return has been our Salomon Brothers
preferred stock. These securities bear a 9.50% coupon, payable quarterly. In
addition, when Salomon Brothers was purchased by Traveler's Corporation their
credit rating was upgraded from the high yield category to investment grade,
giving a boost to the price of the issue. 

We avoided a potential negative impact on total return by the early selling of
Yankee bonds such as Bangkok Bank which were located in the Pacific Rim. The
prices of these bonds took a tumble in the second half of the year as the
southeast Asian crisis unfolded.

PORTFOLIO COMPOSITION AT YEAR END

At the close of the year the portfolio consisted of 2% U.S. Treasury issues, 12%
Yankee bonds, 18% mortgage-backed securities, 21% high yield bonds, and 42%
investment grade corporate bonds. The average duration of the Series was 4.3
years, just slightly longer than that of the benchmark index 4.1 years. 

We believe that the steps taken to diversify the portfolio by sector and to
reduce the size of the holdings in any one name will serve us well in the
volatile investment climate we expect in 1998. We continue to seek out those
areas for investment which will increase the overall yield without adding undue
risk.

We are fortunate to have a staff of talented analysts who monitor the portfolio
securities and seek new names to add. We believe that their efforts will be
invaluable in helping us maintain a solid, rewarding Series for our
shareholders.

Steven M. Bowser
Portfolio Manager

(1)  Performance figures are based on Class A shares and do not reflect
     deduction of the sales charge. The Investment Manager waived its advisory
     fee for the fiscal year ended December 31, 1997 and in the absence of such
     waiver, the performance quoted would be reduced.

                                       6
<PAGE>
Manager's Commentary 
February 15, 1998

                          LIMITED MATURITY BOND SERIES
                                    12-31-97

                [LINEAR GRAPH PLOTTED FROM POINTS IN TABLE BELOW]
                                             
                                                            Lehman
                                                           Brothers   
                                                         Intermediate 
                                          Limited            Term     
                                         Maturity         Corporate   
                                        Bond Series       Bond Index  
                                        -----------      ------------
      01/31/1995  ..................    $10,000.00       $  10,192.00 
      03/31/1995  ..................      9,770.45          10,533.00 
      06/30/1995  ..................     10,329.35          11,194.00 
      09/30/1995  ..................     10,457.98          11,424.00 
      12/31/1995  ..................     10,731.61          11,901.00 
      03/31/1996  ..................     10,644.16          11,735.00 
      06/30/1996  ..................     10,711.88          11,793.00 
      09/30/1996  ..................     10,933.46          12,023.00 
      12/31/1996  ..................     10,956.04          12,375.00 
      03/31/1997  ..................     10,936.02          12,325.00 
      06/30/1997  ..................     11,306.95          12,754.00 
      09/30/1997  ..................     11,652.69          13,158.00 
      12/31/1997  ..................     11,939.12          13,412.00 
           
                             $10,000 OVER TEN YEARS

This chart assumes a $10,000 investment in Class A shares of Limited Maturity
Bond Series on January 17, 1995 (date of inception), and reflects deduction of
the 4.75% sales load. On December 31, 1997, the value of your investment in the
Series' Class A shares (with dividends reinvested) would have grown to $11,939.
By comparison, the same $10,000 investment would have grown to $13,412 based on
the performance of the Lehman Brothers Intermediate Term Corporate Bond Index.

The performance illustrated above is based on the performance of Class A shares.
The performance of Class B shares will be greater or less than the performance
shown for Class A shares as a result of the different loads and fees associated
with an investment in Class B shares.

The performance data illustrated above reflects past performance which is not
predictive of future results.

The Lehman Brothers Intermediate Term Corporate Bond Index includes all
corporate debt securities rated A or higher. Investments cannot be made directly
in an index.

                          LIMITED MATURITY BOND SERIES
                          AVERAGE ANNUAL TOTAL RETURN
                            AS OF DECEMBER 31, 1997

              CLASS A SHARES               CLASS B SHARES              
              --------------               --------------
              1 Year..........  3.76%      1 Year..........  2.70%
              Since Inception.  6.29%      Since Inception.  5.79%
                 (1-17-95)                    (1-17-95)       

The performance data above represents past performance which is not predictive
of future results. For Class A shares these figures reflect deduction of the
maximum sales charge of 4.75%. For Class B shares the figures reflect deduction
of the maximum contingent deferred sales charge, ranging from 5% in the first
year to 0% in the sixth and following years. The Investment Manager waived its
advisory fee for the fiscal year ended December 31, 1997 and in the absence of
such waiver, the performance quoted would be reduced. The investment return and
principal value of an investment will fluctuate so that an investor's shares,
when redeemed, may be worth more or less than their original cost.

                                       7
<PAGE>
Manager's Commentary
February 15, 1998

HIGH YIELD SERIES

The year ended December 31,1997, was an excellent one for the high yield bond
markets. Declining interest rates helped generate record inflows of cash into
high yield funds. Buyers such as pension funds, insurance companies, and other
investment grade bond buyers moved to the high yield markets in their search for
greater returns.

PORTFOLIO PERFORMANCE IN 1997

The High Yield Series of Security Income Fund produced a total return of 12.57%
for the year, coming close to the 12.76% return of the benchmark Lehman High
Yield Index and slightly lagging the 12.96% average yield of its Lipper peer
group.(1) Although our emphasis on the upper tier of ratings within the high
yield universe may subtract modestly from the portfolio's overall return in
periods of strong bond market performance, we believe that the incremental
reduction in risk justifies the practice.

CONTRIBUTORS TO STRONG PERFORMANCE 

Contributing positively to total return, our overweighting in media, finance,
and textile issues served us well. Our media holdings such as Cablevision
Systems, Comcast Corporation, and Adelphia Communications turned in strong
performances. Finance industry bonds including Dollar Financial Group and
Salomon, Inc. were beneficiaries of falling interest rates. The textile industry
overall was a performance laggard, but our holdings in Westpoint Stevens,
Pillowtex Corporation, and Dyersburg Corporation bucked the trend and
contributed strongly to the portfolio's total return.

Throughout the year we had no direct investment in bonds issued by the
governments of emerging market countries nor of corporations located in those
regions. In the latter half of the year those issues declined rapidly in value
as the problems in southeast Asian countries erupted. The portfolio also was
underweighted in bonds of companies operating in the basic industry arenas such
as paper and chemicals. These sectors suffered as commodity prices fell in the
third and fourth quarters of 1997. 

The cash holdings in the portfolio increased as we approached year end,
reflecting the overall market's experience of greater cash inflows. We are
putting this money to work carefully, as opportunities to select undervalued
issues arise. One area in which we have begun building a position is the
homebuilding industry, with names such as Toll Brothers, Inc. and Hovnanian
Enterprises. This industry is experiencing increasing strength as interest rates
on home mortgage loans decline.

OUTLOOK FOR 1998

Our outlook for the high yield bond market for the year ahead is positive.
Declining interest rates make the high yield bond market appealing for fixed
income investors as they search for greater yield than that provided by
investment-grade issues. The high yield bond market frequently exhibits lower
volatility than the stock markets, which may attract equity investors to the
arena as well.

Continuing economic stability in the U.S. should keep defaults in high yield
bond issues at or below their historical averages. Individual selection in this
market remains very important, however, in order to reduce risk, we have
expanded our fixed income analytical staff to aid in research in the high yield
market and will continue to use their abilities to the fullest extent to select
the more creditworthy names for the portfolio.

David Eshnaur
Portfolio Manager

Tom Swank
Portfolio Manager

(1)  Performance figures are based on Class A shares and do not reflect
     deduction of the sales charge. The Investment Manager waived its advisory
     fee for the fiscal year ended December 31, 1997 and in the absence of such
     waiver, the performance quoted would be reduced.

     Investors should remember that while high yield bonds provide potentially
     higher yields than many other types of bonds, they also present greater
     credit risk.

                                        8
<PAGE>
Manager's Commentary 
February 15, 1998

                               HIGH YIELD SERIES
                                    12-31-97

                [LINEAR GRAPH PLOTTED FROM POINTS IN TABLE BELOW]

                                                                Lehman   
                                                  High         Brothers  
                                                 Yield        High Yield 
                                                 Series         Index    
                                               ---------      ----------
           08/31/1996   ..................    $10,000.00       $10,000
           09/30/1996   ..................      9,771.07        10,108
           12/31/1996   ..................     10,009.21        10,713
           03/31/1997   ..................     10,184.31        10,833
           06/30/1997   ..................     10,588.88        11,336
           09/30/1997   ..................     10,992.17        11,852
           12/31/1997   ..................     11,267.25        12,081

                             $10,000 OVER TEN YEARS

This chart assumes a $10,000 investment in Class A shares of High Yield Series
on August 15, 1996 (date of inception), and reflects deduction of the 4.75%
sales load. On December 31, 1997, the value of your investment in the Series'
Class A shares (with dividends reinvested) would have grown to $11,267. By
comparison, the same $10,000 investment would have grown to $12,081 based on the
performance of the Lehman Brothers High Yield Bond Index.

The performance illustrated above is based on the performance of Class A shares.
The performance of Class B shares will be greater or less than the performance
shown for Class A shares as a result of the different loads and fees associated
with an investment in Class B shares.

The performance data illustrated above reflects past performance which is not
predictive of future results.

The Lehman Brothers High Yield Bond Index includes local currency-denominated
sovereign debt of 19 countries plus European Currency Units-denominated debt.
Investments cannot be made directly in an index.

                               HIGH YIELD SERIES
                          AVERAGE ANNUAL TOTAL RETURN
                            AS OF DECEMBER 31, 1997

              CLASS A SHARES               CLASS B SHARES              
              --------------               --------------
              1 Year.......... 7.25%       1 Year..........   6.45%
              Since Inception. 8.94%       Since Inception.  12.91%
                 (8-05-96)                    (8-05-96)

The performance data above represents past performance which is not predictive
of future results. For Class A shares these figures reflect deduction of the
maximum sales charge of 4.75%. For Class B shares the figures reflect deduction
of the maximum contingent deferred sales charge, ranging from 5% in the first
year to 0% in the sixth and following years. The Investment Manager waived its
advisory fee for the fiscal year ended December 31, 1997 and in the absence of
such waiver, the performance quoted would be reduced. The investment return and
principal value of an investment will fluctuate so that an investor's shares,
when redeemed, may be worth more or less than their original cost.

                                       9
<PAGE>
Manager's Commentary
February 15, 1998

SECURITY TAX-EXEMPT FUND

In a year in which Congress took few actions which threatened the status of tax
exempt securities, and in which interest rates in general declined throughout
the year, municipal bond portfolios rewarded their shareholders with attractive
returns. The Security Tax Exempt Fund turned in a respectable 8.26% total return
in 1997, but lagged the peer group average of 9.11% for the year.(1) 

TAX EXEMPT VERSUS TAXABLE YIELDS 

Although actual returns on tax exempt securities were lower for the year than
their taxable counterparts, when calculated on an after-tax basis they remained
very competitive. For example, a shareholder in the Security Tax Exempt Fund who
is in the 28% tax bracket would have earned the equivalent of 11.47% on a
taxable basis. Similarly, shareholders in the 31% bracket realized a
taxable-equivalent yield of 11.97%. The benchmark index for taxable securities,
the Lehman Brothers Government/Corporate Bond Index, returned 9.65% in 1997.

COMPOSITION OF THE PORTFOLIO

The portfolio assets at year end were invested in securities with an average AA
credit quality. As we have noted in the past, it is often more difficult to
obtain financial information on municipalities than on corporations. In
addition, city and state governments are subject to increased expenses as
Congress pushes the costs of assistance programs back to the state levels. For
these reasons we remain conservative in the credit quality of our tax exempt
investments. 

The portfolio average duration at the close of the year was 6.9 years, somewhat
shorter than the 7.25 year average of the benchmark Lehman Brothers Municipal
Bond Index. This hurt overall performance in a year in which declining interest
rates made longer issues more attractive from a total return standpoint. 

The largest sector was education revenue bonds, making up 28.8% of assets. These
issues represented a broad geographic distribution, including states from
Florida to New Jersey to Washington and in between. State general obligation
bonds were the second largest category at 21.9% of assets. Sewer revenues and
electric revenues followed, at 18.4% and 13.3% respectively.

LOOKING AHEAD 

Although a balanced Federal budget would be healthy for the U.S.
economy now that surpluses appear likely, Congressional representatives are
beginning talk of tax cuts. Such talk often has an adverse effect on municipal
bond markets because of the possibility of reduced advantages over taxable
bonds. This negative effect is usually temporary, ending when agreement is
reached on tax legislation.

We expect that overall, the favorable economic conditions and the potential for
declining interest rates will make fixed income instruments attractive for
investment again in 1998. For those taxpayers in the higher tax brackets,
municipal bond markets should once again be an appropriate place to invest.

Steven M. Bowser
Portfolio Manager

(1)  Performance figures are based on Class A shares and do not reflect
     deduction of the sales charge.

                                       10
<PAGE>
Manager's Commentary 
February 15, 1998

                                TAX-EXEMPT FUND
                                    12-31-97

                [LINEAR GRAPH PLOTTED FROM POINTS IN TABLE BELOW]

                                                                  Lehman   
                                                   Tax           Brothers 
                                                  Exempt        Municipal 
                                                   Fund         Bond Fund 
                                                ----------      ----------
         12/31/1987    ..................       $10,000.00      $10,000.00
         03/31/1988    ..................         9,807.91       10,344.37
         06/30/1988    ..................        10,041.92       10,544.50
         09/30/1988    ..................        10,238.86       10,814.86
         12/31/1988    ..................        10,502.39       11,015.17
         03/31/1989    ..................        10,319.80       11,088.33
         06/30/1989    ..................        10,708.82       11,744.82
         09/30/1989    ..................        10,702.98       11,752.52
         12/31/1989    ..................        10,965.63       12,203.33
         03/31/1990    ..................        10,978.37       12,257.75
         06/30/1990    ..................        11,223.32       12,544.22
         09/30/1990    ..................        11,245.12       12,551.58
         12/31/1990    ..................        11,644.73       13,092.97
         03/31/1991    ..................        11,889.41       13,389.21
         06/30/1991    ..................        12,100.61       13,674.34
         09/30/1991    ..................        12,558.32       14,206.18
         12/31/1991    ..................        13,011.37       14,683.22
         03/31/1992    ..................        13,015.75       14,727.30
         06/30/1992    ..................        13,460.82       15,286.26
         09/30/1992    ..................        13,747.41       15,691.89
         12/31/1992    ..................        13,959.38       15,977.57
         03/31/1993    ..................        14,376.39       16,570.48
         06/30/1993    ..................        14,925.64       17,112.66
         09/30/1993    ..................        15,460.46       17,690.71
         12/31/1993    ..................        15,680.82       17,939.04
         03/31/1994    ..................        14,549.84       16,954.31
         06/30/1994    ..................        14,657.41       17,141.97
         09/30/1994    ..................        14,641.50       17,259.27
         12/31/1994    ..................        14,382.28       17,011.42
         03/31/1995    ..................        15,351.79       18,214.21
         06/30/1995    ..................        15,505.12       18,654.09
         09/30/1995    ..................        15,850.20       19,190.60
         12/31/1995    ..................        16,608.37       19,982.05
         03/31/1996    ..................        16,191.18       19,741.04
         06/30/1996    ..................        16,263.54       19,892.38
         09/30/1996    ..................        16,614.08       20,350.36
         12/31/1996    ..................        17,025.09       20,868.92
         03/31/1997    ..................        16,913.83       20,820.29
         06/30/1997    ..................        17,464.03       21,540.25
         09/30/1997    ..................        17,964.94       22,189.78
         12/31/1997    ..................        18,432.51       22,791.52
                      
                             $10,000 OVER TEN YEARS

This chart assumes a $10,000 investment in Class A shares of Tax Exempt Fund on
December 31, 1987, and reflects deduction of the 4.75% sales load. On December
31, 1997, the value of your investment in the Series' Class A shares (with
dividends reinvested) would have grown to $18,433. By comparison, the same
$10,000 investment would have grown to $22,792 based on the performance of the
Lehman Brothers Municipal Bond Index.

The performance illustrated above is based on the performance of Class A shares.
The performance of Class B shares will be greater or less than the performance
shown for Class A shares as a result of the different loads and fees associated
with an investment in Class B shares.

The performance data illustrated above reflects past performance which is not
predictive of future results.

The Lehman Brothers Municipal Bond Index is a total return performance benchmark
for the long-term, investment-grade tax-exempt bond market. Returns and
attributes are calculated semi-monthly using approximately 15,000 municipal
bonds. Investments cannot be made directly in an index.

                                TAX-EXEMPT FUND
                          AVERAGE ANNUAL TOTAL RETURN
                            AS OF DECEMBER 31, 1997

              CLASS A SHARES               CLASS B SHARES              
              --------------               --------------
              1 Year........  3.17%        1 Year..........   1.94%
              5 Years.......  4.70%        Since Inception.   1.87%
              10 Years......  6.31%           (10-19-93)

The performance data above represents past performance which is not predictive
of future results. For Class A shares these figures reflect deduction of the
maximum sales charge of 4.75%. For Class B shares the figures reflect deduction
of the maximum contingent deferred sales charge, ranging from 5% in the first
year to 0% in the sixth and following years. The investment return and principal
value of an investment will fluctuate so that an investor's shares, when
redeemed, may be worth more or less than their original cost.

                                       11
<PAGE>
Manager's Commentary
February 15, 1998

SECURITY CASH FUND

Short-term fixed income investment vehicles such as money market funds saw their
interest rates increase during 1997, unlike their longer-term counterparts which
experienced declining rates. Security Cash Fund returned 4.90% for the year,
matching the average return of its Lipper peer group exactly.

RISING SHORT-TERM RATES

In March the Federal Reserve Board's policy-making arm, the Federal Open Market
Committee, raised its target rate on Federal Funds to 5.50%. The Fed's Funds
rate, the rate at which banks loan overnight funds to each other, is a strong
influence on rate levels for short-term investments such as those used in money
market funds.

The purpose of this rate hike was to keep inflation in the U.S. from escalating.
Investors in long-term bonds watched interest rates decline as the inflation
specter waned. But the Federal Reserve, remaining diligent in its inflation
fight, kept short-term rates at the same level. Investors in Security Cash Fund
thus experienced increased returns over those of the previous year. 

MATURITY STRUCTURE OF THE PORTFOLIO

As in the past, we strive to maintain an average maturity within ten days more
or less than that of the benchmark Money Fund Report published by IBC Donoghue.
We avoid trying to outguess the markets by dramatically lengthening or
shortening the average maturity of the fund. Because of the "laddered" structure
of maturities - issues coming due at regular intervals over the life of the
portfolio - we have holdings maturing frequently and can adjust quickly should
there be a sharp change in short-term interest rates.

ASSET SECTORS REPRESENTED IN THE PORTFOLIO

At the end of 1997 the assets in Security Cash Fund consisted of 79% commercial
paper, 12% federal agency securities, and 9% Small Business Administration
issues. As of year-end, the commercial paper in the portfolio was entirely in
the "top tier" of rating agency classifications, rated at least A1 by Standard
and Poor's rating agency or P1 by Moody's Investor Services. The federal agency
holdings at year end were primarily short-term securities issued by The Federal
Home Loan Bank and the Federal National Mortgage Association.

The Small Business Administration (SBA) issues are fully guaranteed by the
federal government as to timely payment of both principal and interest. These
issues, while bearing stated maturities in the twenty- to thirty-year range, are
considered to be short maturity paper because their interest rates reset
periodically (usually monthly or quarterly). This enables the issues to carry
coupons representing recent market levels, staying competitive with other
short-term investment options.

OUTLOOK FOR 1998

The interest rate outlook for short-term fixed income investments in 1998 is
uncertain. Although the U.S. economy has exhibited several signs of strength in
recent months, the Federal Reserve Open Market Committee may be reluctant to
raise interest rates because the impact of the Asian crisis on the U.S. is as
yet unknown. We will continue to monitor markets carefully, and will remain
ready to adjust portfolio holdings as economic conditions warrant.

FIXED INCOME TEAM

The Security Cash Fund is neither insured nor guaranteed by the U.S. Government
and there is no assurance that the fund will be able to maintain a stable net
asset value of $1.00 per share.

                                       12
<PAGE>
Schedule of Investments
December 31, 1997

SECURITY INCOME FUND
CORPORATE BOND SERIES
<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                 Principal                 Market
CORPORATE BONDS                                                                                    Amount                   Value
- ------------------------------------------------------------------------------------------------------------------------------------
AIR TRANSPORTATION - 4.3%
<S>                                                                                              <C>                      <C>       
Southwest Airlines Company, 7.875% - 2007 ........................................               $1,250,000               $1,382,812
United Airlines, 11.21% - 2014 ...................................................                  950,000                1,315,750
                                                                                                                          ----------
                                                                                                                           2,698,562
BANKS - 10.7%
ABN AMRO Bank NV, 7.55% - 2006 ...................................................                1,000,000                1,070,000
Abbey National PLC, 6.69% - 2005 .................................................                1,250,000                1,276,563
BCH Cayman Islands, Ltd., 7.70% - 2006 ...........................................                1,000,000                1,060,000
Bank of New York, Inc., 6.50% - 2003 .............................................                1,250,000                1,256,250
PNC Funding Corporation, 7.75% - 2004 ............................................                  700,000                  749,875
Santander Financial Issuances, Ltd., 7.00% - 2006 ................................                1,300,000                1,334,125
                                                                                                                          ----------
                                                                                                                           6,746,813
COMMUNICATIONS - 9.2%
Comcast Corporation, 9.125% - 2006 ...............................................                1,000,000                1,062,500
New Jersey Bell, 6.625% - 2008 ...................................................                1,000,000                1,006,250
Paramount Communications, Inc., 7.50% - 2023 .....................................                1,000,000                  947,500
Rogers Cablesystems, Ltd., 9.625% - 2002 .........................................                  750,000                  796,875
Rogers Communication, Inc., 9.125% - 2006 ........................................                  550,000                  558,250
Valassis Communications, Inc., 9.55% - 2003 ......................................                1,250,000                1,404,688
                                                                                                                          ----------
                                                                                                                           5,776,063
ELECTRIC COMPANIES - 0.9%
AES Corporation, 10.25% - 2006 ...................................................                  500,000                  542,500

FINANCE - 7.1%
Associates Corporation, N.A., 7.55% - 2006 .......................................                1,100,000                1,185,250
GE Capital Corporation, 8.625% - 2008 ............................................                  950,000                1,117,438
MCN Investment Corporation, 6.32% - 2003 .........................................                   50,000                   49,750
Morgan Stanley Group, 6.875% - 2007 ..............................................                1,050,000                1,076,250
US West Capital Funding, Inc., 7.30% - 2007 ......................................                1,000,000                1,030,000
                                                                                                                          ----------
                                                                                                                           4,458,688
FOOD & BEVERAGES - 7.5%
Anheuser-Busch Companies, Inc., 7.10% - 2007 .....................................                1,150,000                1,194,562
Chiquita Brands International, Inc., 10.25% - 2006 ...............................               $1,125,000               $1,229,063
Cott Corporation, 9.375% - 2005 ..................................................                1,000,000                1,045,000
Panamerican Beverages, Inc., 8.125% - 2003 .......................................                1,200,000                1,252,500
                                                                                                                          ----------
                                                                                                                           4,721,125
FUNERAL HOMES - 2.6%
Loewen Group International, Inc., 8.25% - 2003 ...................................                1,550,000                1,637,187

HOSPITAL MANAGEMENT - 1.4%
Tenet Healthcare, 10.125% - 2005 .................................................                  800,000                  872,000

MEDIA - 3.0%
Time Warner Entertainment, 10.15% - 2012 .........................................                  880,000                1,131,900
Westinghouse Electric Company, 8.375% - 2002 .....................................                  700,000                  732,375
                                                                                                                          ----------
                                                                                                                           1,864,275
MANUFACTURING - 1.7%
Caterpillar, Inc., 7.375% - 2097 .................................................                1,000,000                1,073,750

MOTOR VEHICLES & EQUIPMENT - 2.0%
Chrysler Corporation, 7.45% - 2027 ...............................................                1,200,000                1,293,000

OIL & GAS COMPANIES - 7.2%
Occidental Petroleum, 6.24% - 2000 ...............................................                   50,000                   50,063
Petroleum Geo-Services, 7.50% - 2007 .............................................                1,150,000                1,216,125
Seagull Energy Corporation, 8.625% - 2005 ........................................                1,000,000                1,042,500
Transocean Offshore, Inc., 8.00% - 2027 ..........................................                1,000,000                1,136,250
Union Pacific Resources Group, 7.50% - 2026 ......................................                1,000,000                1,073,750
                                                                                                                          ----------
                                                                                                                           4,518,688
PUBLISHING & PRINTING - 2.3%
K-III Communications Corporation, 10.25% - 2004 ..................................                  300,000                  322,500
Quebecor Printing Capital, 7.25% - 2007 ..........................................                1,100,000                1,160,500
                                                                                                                          ----------
                                                                                                                           1,483,000
RETAIL - 0.8%
Sears & Roebuck Company, 6.41% - 2007 ............................................                  500,000                  502,500

STEEL & METAL PRODUCTS - 1.3%
AK Steel, 10.75% - 2004 ..........................................................                  750,000                  800,625

TOBACCO PRODUCTS - 0.9%
Philip Morris Company, Inc., 6.80% - 2003 ........................................                  550,000                  556,875

                            See accompanying notes.

                                       13
<PAGE>
Schedule of Investments
December 31, 1997

SECURITY INCOME FUND
CORPORATE BOND SERIES (continued)
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                 Principal
                                                                                                 Amount or
                                                                                                   Number                 Market
CORPORATE BONDS (continued)                                                                      of Shares                 Value
- ------------------------------------------------------------------------------------------------------------------------------------
UTILITIES - 2.2%
Tennessee Gas Pipeline, 7.50% - 2017 .............................................               $1,300,000               $1,392,624
                                                                                                                          ----------
Total corporate bonds - 65.1% .............................................................................               40,938,275

TRUST PREFERRED SECURITIES(3)
- -----------------------------
FINANCE - 7.8%
Chase Capital Trust, 6.3625% - 2027(2) ...........................................               $1,500,000                1,476,585
Countrywide Capital Industries, Inc., 8.00% - 2026 ...............................               $1,000,000                1,053,750
SI Financing, Inc., 9.50% - 2026 .................................................                   48,000                1,296,000
Washington Mutual Capital, 8.375% - 2002 .........................................               $1,000,000                1,097,500
                                                                                                                          ----------
                                                                                                                           4,923,835
INSURANCE - 1.7%
Travelers Capital Trust, 7.75% - 2036 ............................................               $1,050,000                1,107,750
                                                                                                                          ----------
Total trust preferred securities - 9.5% ...................................................................                6,031,585

U.S. GOVERNMENT SECURITIES
- --------------------------
U.S. TREASURY NOTE - 1.7%
        6.50% - 2006 .............................................................               $1,000,000                1,046,920

U.S. TREASURY BONDS - 5.8%
        6.00% - 2026 .............................................................               $1,500,000                1,496,910
        6.625% - 2027 ............................................................               $2,000,000                2,169,660
                                                                                                                          ----------
                                                                                                                           3,666,570
                                                                                                                          ----------
Total U.S. government securities - 7.5% ...................................................................                4,713,490

MORTGAGE BACKED SECURITIES
- --------------------------
U.S. GOVERNMENT AGENCIES - 11.6%
Federal Home Loan Mortgage Corporation,
        FHR 112 H, 8.80% - 2020 ..................................................               $  505,375                  515,693
        FHR 1311 J, 7.50% - 2021 .................................................               $1,050,000                1,080,570
        FHR 1930 AB, 7.50% - 2023 ................................................               $1,548,244                1,578,885
Federal National Mortgage Association,
        FHR 1994-79 B, 7.00% - 2019 ..............................................               $1,100,000               1,111,391
        FHR 1990-52 D, 9.30% - 2019 ..............................................               $  624,064                  637,404
        FHR 1990-108 G, 7.00% - 2020 .............................................               $1,000,000                  999,426
Government National Mortgage Association,
        GNMA 1997-10 B, 7.50% - 2019 .............................................               $  750,000                  765,866
        GNMA II 2445, 8.00% - 2027 ...............................................               $  601,917                  621,407
                                                                                                                         -----------
Total U.S. government agencies - 11.6% ....................................................................                7,310,642

NON-AGENCY SECURITIES - 4.3%
Chase Capital Mortgage Securities Company, 1997-1B, 7.37% - 2007 .................                1,500,000                1,573,125
General Electric Capital Mortgage Securities, 1992-7A, 8.30% -2023 ...............                1,084,848                1,124,015
                                                                                                                         -----------
                                                                                                                           2,697,140

Total mortgage backed securities -15.9% ..................................................................               $10,007,782
                                                                                                                         -----------
Total investments - 98.0% ................................................................................               61,691,132
Cash and other assets, less liabilities - 2.0% ...........................................................                1,288,798
                                                                                                                         -----------
Total net assets - 100.0% ................................................................................               $62,979,930
                                                                                                                         ===========
SECURITY INCOME FUND
U.S. GOVERNMENT SERIES
- ------------------------------------------------------------------------------------------------------------------------------------
U.S. GOVERNMENT & GOVERNMENT AGENCY SECURITIES
- ----------------------------------------------
FEDERAL HOME LOAN BANK - 2.1%
        8.29% - 2015 .............................................................               $  150,000               $  180,359

FEDERAL HOME LOAN MORTGAGE CORPORATION - 8.2%
        7.125% - 2001 ............................................................                  700,000                  713,411

FEDERAL NATIONAL MORTGAGE ASSOCIATION - 20.2%
        7.40% - 2004 .............................................................                  600,000                  644,555
        7.875% - 2005 ............................................................                  340,000                  376,761
        8.10% - 2019 .............................................................                  100,000                  120,687
        8.28% - 2025 .............................................................                  500,000                  625,560
                                                                                                                          ----------
                                                                                                                           1,767,563
FINANCING CORPORATION - 7.9%
        9.65% - 2018 .............................................................                  500,000                  692,500

GOVERNMENT NATIONAL MORTGAGE ASSOCIATION - 32.3%
        GNMA II #1849 8.50% - 2024 ...............................................                  530,345                  558,300
        GNMA II #411643 7.75% - 2025 .............................................                  687,703                  708,719
        GNMA II #2270 8.00% - 2026 ...............................................                  724,159                  747,405
        GNMA II #9365 8.25% - 2026 ...............................................                  267,249                  279,128
        GNMA II #365608 7.50% - 2034 .............................................                  520,509                  530,737
                                                                                                                          ----------
                                                                                                                           2,824,289
STUDENT LOAN MARKETING ASSOCIATION - 5.6%
        9.25% - 2004 .............................................................                  420,000                  491,959

U.S. TREASURY NOTES - 12.4%
        8.50% - 2000 .............................................................                  330,000                  348,299
        6.50% - 2006 .............................................................                  700,000                  732,844
                                                                                                                          ----------
                                                                                                                           1,081,143
U.S. TREASURY BONDS - 9.8%
        8.75% - 2008 .............................................................               $  600,000               $  682,704
        6.00% - 2026 .............................................................                  175,000                  174,638
                                                                                                                          ----------
                                                                                                                             857,342
                                                                                                                          ----------
Total investments - 98.5% .................................................................................                8,608,566
Cash and other assets, less liabilities - 1.5% ............................................................                  134,021
                                                                                                                          ----------
Total net assets - 100.0% .................................................................................               $8,742,587
                                                                                                                          ==========
                            See accompanying notes.

                                       14
<PAGE>
Schedule Of Investments
December 31, 1997

SECURITY INCOME FUND
LIMITED MATURITY BOND SERIES
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                 Principal
                                                                                                 Amount or
                                                                                                   Number                 Market
CORPORATE BONDS                                                                                  of Shares                Value
- ------------------------------------------------------------------------------------------------------------------------------------
AIR TRANSPORTATION - 3.3%
Southwest Airlines Company, 7.875% - 2007 ........................................               $  100,000               $  110,625
United Airlines, 11.21% - 2014 ...................................................                   75,000                  103,875
                                                                                                                          ----------
                                                                                                                             214,500
BANKS - 9.9%
ABN AMRO, 7.55% - 2006 ...........................................................                  150,000                  160,500
Bank Austria, 7.25% - 2017 .......................................................                  160,000                  169,800
Bank of New York, Inc., 6.50% - 2003 .............................................                  100,000                  100,500
First Union Corporation, 8.125% - 2002 ...........................................                  110,000                  117,425
Santander Financial Issuances, Ltd., 7.00% - 2006 ................................                  100,000                  102,625
                                                                                                                          ----------
                                                                                                                             650,850
COMMUNICATIONS - CABLE - 8.8%
Centennial Cellular Corporation, 8.875% - 2001 ...................................                  100,000                  101,875
Comcast Corporation, 9.125% - 2006 ...............................................                  100,000                  106,250
K-III Communications Corporation, 10.25% - 2004 ..................................                   75,000                   80,625
New Jersey Bell, 6.875% - 2007 ...................................................                  100,000                  100,625
Rogers Communication, Inc., 9.125% - 2006 ........................................                  100,000                  101,500
Valassis Communications Corporation, 9.55% - 2003 ................................                   75,000                   84,281
                                                                                                                          ----------
                                                                                                                             575,156
ELECTRIC COMPANIES - 2.3%
Consolidated Edison Company of New York, 6.625% - 2002 ...........................                  150,000                  151,687

ENTERTAINMENT - 1.2%
Speedway Motorsports, Inc., 8.50% - 2007 .........................................                   75,000                   76,688

FINANCE - 12.2%
Associates Corporation, N.A., 7.55% - 2006 .......................................                  100,000                  107,750
General Electric Capital Corporation, 8.625% - 2008 ..............................                  100,000                  117,625
Household Finance Corporation, 8.00% - 2004 ......................................                  150,000                  162,750
International Lease Finance Corporation, 8.25% - 2000 ............................                  150,000                  156,188
MCN Investment Corporation, 6.32% - 2003 .........................................                  150,000                  149,250
Morgan Stanley Group, 6.875% - 2007 ..............................................                  100,000                  102,500
                                                                                                                          ----------
                                                                                                                             796,063
FOOD & BEVERAGE TRADE - 4.8%
Anheuser-Busch Companies, Inc., 7.10% - 2007 .....................................               $  100,000               $  103,875
Cott Corporation, 9.375% - 2005 ..................................................                  100,000                  104,500
PanAmerican Beverage, Inc., 8.125% - 2003 ........................................                  100,000                  104,375
                                                                                                                          ----------
                                                                                                                             312,750
FUNERAL HOMES - 1.6%
Loewen Corporation, 8.25% - 2003 .................................................                  100,000                  105,625

HOSPITAL MANAGEMENT - 1.7%
Tenet Healthcare, 10.125% - 2005 .................................................                  100,000                  109,000

MANUFACTURING - 1.6%
Shop Vac Corporation, 10.625% - 2003 .............................................                  100,000                  108,624

MEDIA - 5.1%
Heritage Media Corporation, 8.75% - 2006 .........................................                  100,000                  107,000
News America Holdings, 8.625% - 2003 .............................................                   50,000                   54,625
Time-Warner Entertainment Corporation, 10.15% - 2012 .............................                   50,000                   64,313
Westinghouse Electric Company, 8.375% - 2002 .....................................                  100,000                  104,625
                                                                                                                          ----------
                                                                                                                             330,563
METALS - 2.3%
Alcan Aluminum, Ltd., 9.20% - 2001 ...............................................                  148,000                  148,924

MOTOR VEHICLES & EQUIPMENT - 0.8%
Chrysler Corporation, 7.45% - 2027 ...............................................                   50,000                   53,875

NATURAL GAS COMPANIES - 2.5%
Vastar Resources, Inc., 8.75% - 2005 .............................................                  150,000                  167,063

OIL & GAS COMPANIES - 2.4%
Seagull Energy Corporation, 8.625% - 2005 ........................................                  150,000                  156,375

PUBLISHING & PRINTING - 1.6%
Quebecor Printing Capital, 7.25% - 2007 ..........................................                  100,000                  105,500

RETAIL TRADE - 6.2%
Sears Corporation, 6.41% - 2001 ..................................................                  150,000                  150,750
Wal-Mart Stores, Inc., 7.50% - 2004 ..............................................                  150,000                  160,313
Zale's Corporation, 8.50% - 2007 .................................................                  100,000                   98,750
                                                                                                                          ----------
                                                                                                                             409,813
TOBACCO PRODUCTS - 2.4%
Dimon, Inc., 8.875% - 2006 .......................................................                   50,000                   54,000
Philip Morris Company, Inc., 6.80% - 2003 ........................................                   50,000                   50,625
Standard Commercial Tobacco, 8.875% - 2005 .......................................                   50,000                   50,313
                                                                                                                          ----------
                                                                                                                             154,938
Total corporate bonds - 70.7% .............................................................................                4,627,994

                            See accompanying notes.

                                       15
<PAGE>
Schedule of Investments
December 31, 1997

SECURITY INCOME FUND
LIMITED MATURITY BOND SERIES (continued)
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                 Principal
                                                                                                 Amount or
                                                                                                   Number                 Market
TRUST PREFERRED SECURITIES(3)                                                                    of Shares                Value
- ------------------------------------------------------------------------------------------------------------------------------------
FINANCE - 1.9%
SI Financing, Inc., 9.50% - 2026 .................................................                    4,560               $  123,120

INSURANCE - 2.4%
Travelers Capital Trust, 7.75% - 2036 ............................................               $  150,000                  158,250
                                                                                                                          ----------
Total trust preferred securities - 4.3% ...................................................................                  281,370

MORTGAGE BACKED SECURITIES
- --------------------------
U.S. GOVERNMENT AGENCIES - 14.7%
Federal Home Loan Mortgage Corporation,
   FHR 1102 G, 8.00% - 2020 ......................................................               $  139,293                  141,325
   FHR 1104 K, 8.50% - 2020 ......................................................               $   44,000                   45,032
   FHR 1311 J, 7.50% - 2021 ......................................................               $  100,000                  102,911
   FHR 1930 AB, 7.50% - 2023 .....................................................               $  113,841                  116,095
   FHR 42 K, 8.00% - 2024 ........................................................               $  186,000                  189,765

Federal National Mortgage Association,
   1992-98 PJ, 7.50% - 2019 ......................................................               $  118,000                  119,756
   1992-143 J, 7.00% - 2020 ......................................................               $  100,000                   99,680
Government National Mortgage Association,

   GNMA II 2445, 8.00% - 2027 ....................................................               $  144,460                  149,138
                                                                                                                          ----------
                                                                                                                             963,702
NON AGENCY SECURITIES - 3.2%
General Electric Capital Mortgage Securities, #1992-7A 8.30% - 2023 ..............               $  100,778                  104,417
Sears Mortgage Securities 1994-14 T3, 8.50% - 2022 ...............................               $  100,000                  103,226
                                                                                                                          ----------
                                                                                                                             207,643
                                                                                                                          ----------
Total mortgage backed securities - 17.9% ..................................................................                1,171,345

GOVERNMENT & GOVERNMENT AGENCY SECURITIES
- -----------------------------------------
Canadian Government Agencies - 2.6%

Province of Quebec, 8.625% - 2005 ................................................               $  150,000                  168,750

U.S. GOVERNMENT SECURITIES - 1.6%
U.S. Treasury Note, 6.50% - 2006 .................................................               $  100,000                  104,692
                                                                                                                          ----------
Total government & government agency securities - 4.2% ....................................................                  273,442
                                                                                                                          ----------
Total investments - 97.1% .................................................................................                6,354,151
Cash and other assets, less liabilities - 2.9% ............................................................                  190,023
                                                                                                                          ----------
Total net assets - 100.0% .................................................................................               $6,544,174
                                                                                                                          ==========
SECURITY INCOME FUND
HIGH YIELD SERIES
- ------------------------------------------------------------------------------------------------------------------------------------
CORPORATE BONDS
- ---------------
AEROSPACE/DEFENSE - 1.3%
Burke Industries, Inc., 10.0% - 2007 .............................................               $  125,000               $  129,688

BANKS & CREDIT - 1.1%
Bay View Capital Corporation, 9.125% - 2007 ......................................                  100,000                  102,750

BEVERAGES - 2.2%
Cott Corporation, 9.375% - 2005 ..................................................                  100,000                  104,500
Delta Beverage Group, 9.75% - 2003 ...............................................                  100,000                  105,500
                                                                                                                          ----------
                                                                                                                             210,000
BROADCAST MEDIA - 2.9%
Allbritton Communications Company, 9.75% - 2007 ..................................                  100,000                  102,250
Young Broadcasting, 8.75% - 2007 .................................................                  175,000                  173,250
                                                                                                                          ----------
                                                                                                                             275,500
BUILDING MATERIALS - 3.3%
AAF-McQuay, Inc., 8.875% - 2003 ..................................................                  100,000                   99,125
Johns Manville International
        Group, Inc., 10.875 - 2004 ...............................................                  100,000                  110,750
Sequa Corporation, 9.375% - 2003 .................................................                  100,000                  104,250
                                                                                                                          ----------
                                                                                                                             314,125
BUSINESS SERVICES - 1.1%
Heritage Media Corporation, 8.75% - 2006 .........................................                  100,000                  107,000

CABLE SYSTEMS - 2.5%
Adelphia Communications Corporation, 9.875% - 2007 ...............................                  100,000                  105,750
Adelphia Communications, 12.50% - 2002 ...........................................                   26,000                   27,300
Rogers Cablesystems, Ltd., 9.625% - 2002 .........................................                  100,000                  106,250
                                                                                                                          ----------
                                                                                                                             239,300
CHEMICALS - 1.1%
Envirodyne Industries, Inc., 12.00% - 2000 .......................................                  100,000                  107,125

COAL MINING - 1.6%
AEI Holdings, 10.00% - 2007 ......................................................                  150,000                  153,750

COMMUNICATIONS - 1.5%
Century Communication Corporation, 8.375% - 2007 .................................                   75,000                   75,000
Rogers Communications, Inc., 9.125% - 2006 .......................................                   70,000                   71,050
                                                                                                                          ----------
                                                                                                                             146,050
                             See accompanying notes

                                       16
<PAGE>
Schedule of Investments
December 31, 1997

SECURITY INCOME FUND
HIGH YIELD SERIES (continued)
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                 Principal
                                                                                                 Amount or
                                                                                                   Number                 Market
CORPORATE BONDS (continued)                                                                      of Shares                Value
- ------------------------------------------------------------------------------------------------------------------------------------
COMMUNICATION SERVICES - 3.5%
Cablevision Systems Corporation, 7.875% - 2004 ...................................               $  100,000               $  102,125
Century Communications Corporation, 9.50% - 2005 .................................                  125,000                  131,563
Comcast Corporation, 9.125% - 2006 ...............................................                  100,000                  106,250
                                                                                                                          ----------
                                                                                                                             339,938
ELECTRIC UTILITIES - 3.2%
AES Corporation, 10.25% - 2006 ...................................................                  135,000                  146,475
Cal Energy Company, Inc., 9.50% - 2006 ...........................................                  150,000                  163,125
                                                                                                                          ----------
                                                                                                                             309,600
FINANCIAL SERVICES - 4.5%
Dollar Financial Group, Inc., 10.875% - 2006 .....................................                  100,000                  106,875
Emergent Group, Inc., 10.75% - 2004 ..............................................                  175,000                  175,000
Homeside, Inc., 11.25% - 2003 ....................................................                  125,000                  148,125
                                                                                                                          ----------
                                                                                                                             430,000
FOOD AND BEVERAGES - 1.1%
Chiquita Brands International, Inc., 10.25% - 2006 ...............................                  100,000                  109,250

GAMING - 2.1%
Harrahs Operating, Inc., 8.75% - 2000 ............................................                  100,000                  102,375
Station Casinos, Inc., 9.625% - 2003 .............................................                  100,000                  103,500
                                                                                                                          ----------
                                                                                                                             205,875
HEALTH CARE SERVICES - 2.5%
Genesis Eldercare Acquisitions, 9.00% - 2007 .....................................                   75,000                   73,500
Tenet Healthcare Corporation, 10.125% - 2005 .....................................                  150,000                  163,500
                                                                                                                          ----------
                                                                                                                             237,000
MANUFACTURING - 4.9%
AGCO Corporation, 8.50% - 2006 ...................................................                  100,000                  102,500
DESA International, Inc., 9.875% - 2007 ..........................................                  150,000                  153,750
Shop Vac Corporation, 10.625% - 2003 .............................................                  100,000                  108,625
Titan Wheel International, Inc., 8.75% - 2007 ....................................                  100,000                  104,750
                                                                                                                          ----------
                                                                                                                             469,625
MISCELLANEOUS - 1.1%
Packard Bioscience Company, 9.375% - 2007 ........................................                  110,000                  105,875

OIL - 6.8%
COHO Energy, Inc., 8.875% - 2007 .................................................               $  150,000               $  150,375
Crown Central Petroleum, 10.875% - 2005 ..........................................                  140,000                  148,750
Giant Industries, 9.00% - 2007 ...................................................                  125,000                  124,375
Seagull Energy Corporation, 8.625% - 2005 ........................................                   75,000                   78,188
Southwest Royalties, Inc., 10.50% - 2004 .........................................                  150,000                  148,125
                                                                                                                          ----------
                                                                                                                             649,813
OFFICE EQUIPMENT AND SUPPLIES - 1.2%
Knoll, Inc., 10.875% - 2006 ......................................................                  100,000                  111,750

PACKAGING & CONTAINERS - 3.2%
Huntsman Packaging Corporation, 9.125% - 2007 ....................................                  175,000                  180,250
Plastic Containers, Inc., 10.00% - 2006 ..........................................                  125,000                  131,563
                                                                                                                          ----------
                                                                                                                             311,813
PUBLISHING - 3.7%
Big Flower Press Holdings, Inc., 8.875% - 2007 ...................................                  100,000                  100,750
Golden Books Publishing, Inc., 7.65% - 2002 ......................................                  100,000                   96,250
Hollinger International Publishing, 8.625% - 2005 ................................                   75,000                   77,531
K-III Communications Corporation, 10.25% - 2004 ..................................                   50,000                   53,750
Valissis Communications, Inc., 9.55% - 2003 ......................................                   25,000                   28,094
                                                                                                                          ----------
                                                                                                                             356,375
REAL ESTATE - 1.1%
B.F. Saul REIT, 11.625% - 2002 ...................................................                  100,000                  106,750

RECREATION - 3.9%
AMF Bowling Worldwide, Inc., 10.875% - 2006 ......................................                  100,000                  109,625
Premier Parks, 9.75% - 2007 ......................................................                  150,000                  159,375
Speedway Motorsports, Inc., 8.50% - 2007 .........................................                  100,000                  102,250
                                                                                                                          ----------
                                                                                                                             371,250
RESTAURANTS - 3.2%
Carrols Corporation, 11.50% - 2003 ...............................................                  175,000                  185,938
Friendly Ice Cream Corporation, 10.50% - 2007 ....................................                  125,000                  125,625
                                                                                                                          ----------
                                                                                                                             311,563
RETAIL - GROCERY - 1.3%
Marsh Supermarket, Inc., 8.875% - 2007 ...........................................                  125,000                  126,562

                            See accompanying notes.

                                       17
<PAGE>
Schedule of Investments
December 31, 1997

SECURITY INCOME FUND
HIGH YIELD SERIES
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                 Principal
                                                                                                 Amount or
                                                                                                   Number                 Market
CORPORATE BONDS (continued)                                                                      of Shares                Value
- ------------------------------------------------------------------------------------------------------------------------------------
RETAIL - GENERAL MERCHANDISING - 1.1%
Cole National Group, 9.875% - 2006 ...............................................               $  100,000               $  106,750


RETAIL - SPECIALTY - 3.0%
Central Tractor, 10.625% - 2007 ..................................................                  100,000                  105,750
Southland Corporation, 4.50% - 2004 ..............................................                  100,000                   81,000
Zale's Corporation, 8.50% - 2007 .................................................                  100,000                   98,750
                                                                                                                          ----------
                                                                                                                             285,500
STEEL - 2.6%
AK Steel Corporation, 9.125% - 2006 ..............................................                   75,000                   77,062
Wheeling-Pittsburgh Corporation, 9.25% - 2007 ....................................                  175,000                  171,500
                                                                                                                          ----------
                                                                                                                             248,562
TELECOMMUNICATIONS - 6.4%
Centennial Cellular, Inc., 8.875% - 2001 .........................................                  150,000                  152,812
Comcast Cellular Holdings, Inc., 9.50% - 2007 ....................................                  150,000                  156,750
Intermedia Communications, Inc., 8.50% - 2008 ....................................                  125,000                  125,000
RCN Corporation, 10.0% - 2007 ....................................................                  175,000                  180,250
                                                                                                                          ----------
                                                                                                                             614,812
TEXTILES - 7.3%
Delta Mills, Inc., 9.625% - 2007 .................................................                  125,000                  127,187
Dyersburg Corporation, 9.75% - 2007 ..............................................                  125,000                  130,938
Pillowtex Corporation, 9.00% - 2007 ..............................................                  125,000                  127,656
Westpoint Stevens, Inc., 9.375% - 2005 ...........................................                  150,000                  157,125
Worldtex, Inc., 9.625% - 2007 ....................................................                  150,000                  154,125
                                                                                                                          ----------
                                                                                                                             697,031
TOBACCO - 1.3%
Dimon, Inc., 8.875% - 2006 .......................................................                   50,000                   54,000
Standard Commercial Tobacco, 8.875% - 2005 .......................................                   75,000                   75,468
                                                                                                                          ----------
                                                                                                                             129,468
TRANSPORTATION - 3.3%
Allied Holdings, Inc., 8.625% - 2007 .............................................                  175,000                  179,375
Teekay Shipping Corporation, 8.32% - 2008 ........................................                  135,000                  137,363
                                                                                                                          ----------
                                                                                                                             316,738
                                                                                                                          ----------
Total corporate bonds - 90.9% .............................................................................                8,737,188

TRUST PREFERRED SECURITIES(3)
- -----------------------------
FINANCE - 1.4%
SI Financing, Inc.,  9.50% - 2026 ................................................                    5,000               $  135,000

PREFERRED STOCKS

BANKS AND CREDIT - 2.1%
California Federal Bank, 11.50% ..................................................                    1,750                  197,750

COMMUNICATIONS - 0.6%
Cablevision Systems, Inc., .......................................................                      541                   62,291

PUBLISHING - 0.8%
PRIMEDIA, Inc., 10.00% - 2008 ....................................................                      700                   73,675
                                                                                                                          ----------
Total preferred stocks - 3.5% .............................................................................                  333,716
                                                                                                                          ----------
Total investments - 95.8% .................................................................................                9,205,904
Cash and other assets, less liabilities 4.2% ..............................................................                  405,561
                                                                                                                          ----------
Total net assets - 100.0% .................................................................................               $9,611,465
                                                                                                                          ==========
SECURITY TAX-EXEMPT FUND
- ------------------------------------------------------------------------------------------------------------------------------------
MUNICIPAL BONDS
- ---------------
EDUCATION REVENUE - 28.8%
Florida State Board of Education Capital Outlay, 5.00% - 2011 ....................               $1,000,000               $1,016,250
Illinois Chicago School, A, 4.90% - 2005 .........................................               $1,000,000                1,032,500
Island County Washington School District, South Whidbey, 6.75% - 2007 ............               $1,000,000                1,191,910
Mukwanago, Wisconsin School District, 5.00% - 2004 ...............................               $  500,000                  520,000
North Brunswick Township, New Jersey Board of Education, 6.30% - 2013 ............               $1,000,000                1,113,750
Ohio State Public Facilities Series II-B, 5.00% - 2012 ...........................               $1,100,000                1,115,125
University of Texas, 4.80% - 2009 ................................................               $1,000,000                1,015,000
                                                                                                                          ----------
                                                                                                                           7,004,535
ELECTRIC UTILITY REVENUE - 13.3%
Nebraska Public Power District
Revenue, Series A, 6.25% - 2022 ..................................................               $1,000,000                1,067,500
Orville, Ohio Electric System Revenue Bond, 5.00% - 2010 .........................               $1,000,000                1,031,250
Washington Public Power Supply System Revenue Nuclear Project #2, 6.30% - 2012 ...               $1,000,000                1,130,000
                                                                                                                          ----------
                                                                                                                           3,228,750

                            See accompanying notes.

                                       18
<PAGE>
Schedule of Investments
December 31, 1997

SECURITY TAX-EXEMPT FUND (continued)
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                 Principal
                                                                                                 Amount or
                                                                                                   Number                  Market
MUNICIPAL BONDS (continued)                                                                      of Shares                 Value
- ------------------------------------------------------------------------------------------------------------------------------------
GENERAL OBLIGATION - 21.9%
Clark County, Nevada School District, Series A, 5.50% - 2016 .....................               $1,000,000              $ 1,031,250
Dade County, Florida, 5.75% - 2001 ...............................................                1,000,000                1,056,250
Henderson, Nevada Parks & Recreation, 5.875% - 2004 ..............................                1,000,000                1,089,330
Pennsylvania State, 5.00% - 2006 .................................................                1,000,000                1,043,750
Rhode Island General Obligation, 5.30% - 2008 ....................................                1,030,000                1,091,800
                                                                                                                         -----------
                                                                                                                           5,312,380
SPECIAL OBLIGATION - 4.1%
Massachusetts Special Obligation Bond, 4.80% - 2009 ..............................                1,000,000                1,006,250

PORTS & HARBORS - 2.2%
Kansas City, Missouri Port Authority Riverfront Park, 5.75% - 2005 ...............                  500,000                  532,500

SEWER REVENUE - 18.4%
DuPage County, Illinois Stormwater Project Refunding, 5.60% - 2021 ...............                1,000,000                1,088,750
Houston, Texas Water & Sewer System Revenue, Series A, 6.20% - 2020 ..............                1,000,000                1,118,750
King County Washington Sewer Revenue, Series A, 6.25% - 2034 .....................                1,000,000                1,082,500
Los Angeles, California Wastewater System Revenue, 6.00% - 2014 ..................                1,100,000                1,177,000
                                                                                                                         -----------
                                                                                                                           4,467,000
TRANSPORTATION - 4.2%
Los Angeles County, California Metro Authority, 5.625% - 2018 ....................                1,000,000                1,035,000

WATER REVENUE - 4.6%
New York State Environmental Facilities Corporation Pollution Control Revenue,
        5.75% - 2009 .............................................................                1,000,000                1,111,250
                                                                                                                         -----------
Total investments - 97.5% .................................................................................               23,697,665
Cash and other assets, less liabilities - 2.5% ............................................................                  599,647
                                                                                                                         -----------
Total net assets - 100.0% .................................................................................              $24,297,312
                                                                                                                         ===========
SECURITY CASH FUND
- ------------------------------------------------------------------------------------------------------------------------------------
COMMERCIAL PAPER
- ----------------
BROKERAGE - 7.5%
Bear Stearns Companies, Inc., 5.57%, 2-12-98 .....................................               $2,000,000               $1,987,003
Merrill Lynch & Company, Inc., ...................................................                2,320,000
        5.57%, 1-06-98 ...........................................................                                           469,636
        5.72%, 1-09-98 ...........................................................                                           798,983
        5.63%, 1-14-98 ...........................................................                                           948,069
        5.60%, 2-20-98 ...........................................................                                           99,222
                                                                                                                          ----------
                                                                                                                           4,302,913
BUSINESS SERVICES - 7.6%
General Electric Capital Corporation, ............................................                2,400,000
        5.72%, 1-05-98 ...........................................................                                           999,364
        5.58%, 1-15-98 ...........................................................                                         1,396,962
Nordstrom Credit, Inc., ..........................................................                2,000,000
        6.00%, 1-12-98 ...........................................................                                         1,996,333
                                                                                                                          ----------
                                                                                                                           4,392,659
COMBINATION GAS & ELECTRIC - 4.9%
Baltimore Gas & Electric Company, ................................................                2,803,000
        5.95%, 1-07-98 ...........................................................                                         1,998,017
        5.97%, 1-13-98 ...........................................................                                           801,402
                                                                                                                          ----------
                                                                                                                           2,799,419
COMPUTER SYSTEMS - 1.3%
International Business Machines Corporation, 5.71%, 1-07-98 ......................                  760,000                  759,277

ELECTRIC UTILITIES - 15.0%
Central Louisiana Electric Company, Inc., ........................................                2,450,000
        5.55%, 1-12-98 ...........................................................                                         1,447,541
        5.85%, 1-21-98 ...........................................................                                           996,750
Interstate Power Company, ........................................................                2,809,000
        5.90%, 1-13-98 ...........................................................                                           383,245
        5.77%, 1-21-98 ...........................................................                                           996,794
        5.75%, 1-26-98 ...........................................................                                           821,706
        6.00%, 1-26-98 ...........................................................                                           597,500
New England Power Company, .......................................................                  260,000
        6.15%, 1-08-98 ...........................................................                                           259,689
Progress Capital Holdings, Inc., .................................................                3,040,000
        5.84%, 1-13-98 ...........................................................                                         1,237,586
        6.34%, 1-14-98 ...........................................................                                           448,970
        5.87%, 1-16-98 ...........................................................                                         1,346,698
                                                                                                                          ----------
                                                                                                                           8,536,479
ELECTRICAL EQUIPMENT - 4.9%
General Electric Company, ........................................................                2,830,000
        5.53%, 1-13-98 ...........................................................                                           648,802
        5.60%, 1-14-98 ...........................................................                                         2,175,592
                                                                                                                          ----------
                                                                                                                           2,824,394
                            See accompanying notes.

                                       19
<PAGE>
Schedule of Investments
December 31, 1997

SECURITY CASH FUND (continued)
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                 Principal
                                                                                                 Amount or
                                                                                                   Number                  Market
COMMERCIAL PAPER (continued)                                                                     of Shares                 Value
- ------------------------------------------------------------------------------------------------------------------------------------
ELECTRONICS - 4.8%
AVNET, Inc., .....................................................................               $2,770,000
        5.63% - 1-16-98 ..........................................................                                        $1,995,308
        5.65% - 1-23-98 ..........................................................                                           637,791
        5.70% - 1-23-98 ..........................................................                                           129,547
                                                                                                                          ----------
                                                                                                                           2,762,646

ENGINEERING - 1.9%
FLUOR Corporation, ...............................................................                1,100,000
        5.71% - 1-16-98 ..........................................................                                           698,335
        6.20% - 1-23-98 ..........................................................                                           398,484
                                                                                                                          ----------
                                                                                                                           1,096,819

ENTERTAINMENT - 3.4%
The Walt Disney Company, 5.63% - 3-27-98 .........................................                2,000,000                1,973,414

HARDWARE & TOOLS - 4.2%
Sherwin-Williams Company (PP), 5.83% - 1-09-98 ...................................                2,000,000                1,997,409
Stanley Works, Inc., 5.64%, 2-12-98 ..............................................                  425,000                  422,204
                                                                                                                          ----------
                                                                                                                           2,419,613
LEASING - 1.7%
International Lease Financing Corporation, 5.54% - 1-20-98 .......................                1,000,000                  997,076

NATURAL GAS - 6.4%
Bay State Gas Company, ...........................................................                  940,000
        5.70% - 1-15-98 ..........................................................                                           239,468
        6.10% - 1-15-98 ..........................................................                                           399,051
        5.71% - 1-22-98 ..........................................................                                           299,001
Questar Corporation ..............................................................                2,725,000
        5.80% - 1-05-98 ..........................................................                                           227,853
        6.00% - 1-27-98 ..........................................................                                           494,846
        5.95% - 2-03-98 ..........................................................                                         1,989,092
                                                                                                                          ----------
                                                                                                                           3,649,311
POLLUTION CONTROL - 3.7%
Engelhard Corporation, 5.72% - 2-27-98 ...........................................                2,170,000                2,150,347

RETAIL - GROCERY - 4.7%
Winn-Dixie Stores, Inc., .........................................................                2,700,000
        5.50% - 1-06-98 ..........................................................                                           999,236
        5.68% - 2-10-98 ..........................................................                                         1,689,271
                                                                                                                          ----------
                                                                                                                           2,688,507
TELECOMMUNICATIONS - 6.4%
AT&T Company, 5.75% - 1-27-98 ....................................................                2,100,000                2,091,279
Bell Atlantic Network Funding Corporation, 5.90% - 1-08-98 .......................                1,600,000                1,598,164
                                                                                                                          ----------
                                                                                                                           3,689,443
                                                                                                                          ----------
Total commercial paper - 78.4% ............................................................................               45,042,317


U.S. GOVERNMENT & AGENCIES
- --------------------------
FEDERAL HOME LOAN MORTGAGE CORPORATION - 8.7%
        5.87% - 1-30-98 ..........................................................               $2,000,000              $ 2,000,000
        5.90% - 9-30-98 ..........................................................                2,000,000                2,000,000
        5.95% - 11-12-98 .........................................................                1,000,000                1,000,000
                                                                                                                         -----------
                                                                                                                           5,000,000
FEDERAL NATIONAL MORTGAGE ASSOCIATION - 3.5%
        5.74% - 6-09-98 ..........................................................                2,000,000                2,000,000

SMALL BUSINESS ASSOCIATION POOLS - 8.8%
        #501927 - 6.75%, 2017(1) .................................................                1,810,126                1,827,209
        #502398 - 6.125%, 2018(2) ................................................                  855,517                  858,725
        #503152 - 6.125%, 2020(2) ................................................                  881,942                  881,942
        #503295 - 6.00%, 2021(2) .................................................                  742,200                  742,665
        #503303 - 6.00%, 2021(2) .................................................                  727,875                  728,331
                                                                                                                         -----------
                                                                                                                           5,038,872
                                                                                                                         -----------
Total U.S. government & agencies - 21.0% ..................................................................               12,038,872
                                                                                                                         -----------
Total investments - 99.4% .................................................................................               57,081,189
Cash and other assets, less liabilities - 0.6% ............................................................                  359,596
                                                                                                                         -----------
Total net assets - 100.0% .................................................................................              $57,440,785
                                                                                                                         ===========
</TABLE>
The identified cost of investments owned at December 31, 1997, was the same for
federal income tax and book purposes, except for the Corporate Bond Series for
which the identified cost for federal income tax purposes was $59,522,510.

PP  - indicates private placement.

(1) Variable rate security which may be reset the first of each month.

(2) Variable rate security which may be reset the first of each quarter.

(3) Trust Preferred Securities - Securities issued by financial institutions to
    augment their Tier 1 capital base. Issued on a subordinate basis relative to
    senior notes or debentures. Institutions may defer cash payments for up to
    10 pay periods.

                            See accompanying notes.

                                       20
<PAGE>
                                 BALANCE SHEETS
                               December 31, 1997
<TABLE>
<CAPTION>
                                                                         Security Income Fund
                                                           -----------------------------------------------
                                                           Corporate       U.S.     Limited       High       Security      Security
                                                              Bond      Government  Maturity      Yield     Tax-exempt       Cash
                                                             Series       Series   Bond Series    Series       Fund          Fund
                                                           -----------  ----------  ----------  ----------  -----------  -----------
Assets
<S>                                                            <C>          <C>         <C>        <C>          <C>          <C>    
Investments, at value (identified cost $59,519,623,
        $8,297,425, $6,201,058, $8,931,926,
        $22,653,326 and $12,038,872, respectively) ......  $61,691,132  $8,608,566  $6,354,151  $9,205,904  $23,697,665  $12,038,872
Commercial paper, at amortized cost which
        approximates market value .......................         --          --          --          --           --     45,042,317
Cash ....................................................      459,237      13,534      68,711     222,116      260,727      311,774
Receivables:
        Fund shares sold ................................       34,342         167        --         8,950         --         56,082
        Securities sold .................................         --          --          --          --           --         50,703
        Interest ........................................      961,521     130,509     112,851     193,041      353,066      216,444
Prepaid expenses ........................................        8,884      21,058      15,248       1,837        8,833       60,475
                                                           -----------  ----------  ----------  ----------  -----------  -----------
        Total assets ....................................  $63,155,116  $8,773,834  $6,550,961  $9,631,848  $24,320,291  $57,776,667
                                                           ===========  ==========  ==========  ==========  ===========  ===========

LIABILITIES AND NET ASSETS
Liabilities:
        Payable for:
                Securities purchased ....................  $      --    $     --     $    --    $     --    $      --    $      --
                Fund shares redeemed ....................      101,212      20,000        --          --         14,419
                Dividends payable to shareholders .......         --          --          --          --           --        258,814
        Other Liabilities:
                Management fees .........................       28,405        --          --          --         10,861       26,240
                Custodian fees ..........................        1,502         300        --         2,474         --          1,479
                Transfer and administration fees ........       14,367       2,729       1,110       2,475        3,218       13,934
                Professional fees .......................        2,311       4,281       2,983       4,947        5,600        5,017
                12b-1 distribution plan fees ............       18,555       2,717       2,124      10,487        2,088         --
                Miscellaneous fees ......................        8,834       1,220         570        --          1,212       15,979
                                                           -----------  ----------  ----------  ----------  -----------  -----------
                        Total liabilities ...............      175,186      31,247       6,787      20,383       22,979      335,882
Net Assets:
Paid in capital .........................................   73,978,535   9,388,252   6,449,575   9,337,487   24,496,978   57,440,785
Undistributed net investment income .....................       22,204       3,764       4,097        --          2,952         --
Accumulated undistributed net realized gain (loss)
        on sale of investments ..........................  (13,192,318)   (960,570)    (62,591)       --     (1,246,957)        --
Net unrealized appreciation
        in value of investments .........................    2,171,509     311,141     153,093     273,978    1,044,339         --
                                                           -----------  ----------  ----------  ----------  -----------  -----------
                Net assets ..............................   62,979,930   8,742,587   6,544,174   9,611,465   24,297,312   57,440,785
                                                           -----------  ----------  ----------  ----------  -----------  -----------
                Total liabilities and net assets ........  $63,155,116  $8,773,834  $6,550,961  $9,631,848  $24,320,291  $57,776,667
                                                           ===========  ==========  ==========  ==========  ===========  ===========
CLASS "A" SHARES
Capital shares outstanding ..............................    8,013,301   1,590,192     533,063     329,682    2,178,679   57,440,785
Net assets ..............................................  $56,486,745  $7,651,715  $5,489,908  $5,179,468  $21,953,078  $57,440,785
Net asset value per share (net assets divided by
        shares outstanding) .............................  $      7.05  $     4.81  $    10.30  $    15.71  $     10.08  $      1.00
Add: Selling commission (4.75% of the
        offering price) .................................         0.35        0.24        0.51        0.78         0.50         --
                                                           -----------  ----------  ----------  ----------  -----------  -----------
Offering price per share (net asset value
        divided by 95.25%) ..............................  $      7.40  $     5.05  $    10.81  $    16.49  $     10.58  $      1.00
                                                           ===========  ==========  ==========  ==========  ===========  ===========
CLASS "B" SHARES
Capital shares outstanding ..............................      915,701     227,094     102,608     282,659      232,655         --
Net assets ..............................................  $ 6,493,185  $1,090,872  $1,054,266  $4,431,997  $ 2,344,234         --
Net asset value per share (net assets divided
        by shares outstanding) ..........................  $      7.09  $     4.80  $    10.27  $    15.68  $     10.08         --
                                                           ===========  ==========  ==========  ==========  ===========  ===========
</TABLE>
                            See accompanying notes.

                                       21
<PAGE>
                            STATEMENT OF OPERATIONS
                      For the Year Ended December 31, 1997
<TABLE>
<CAPTION>
                                                                       Security Income Fund
                                                    ---------------------------------------------------
                                                     Corporate       U.S.        Limited        High       Security      Security
                                                        Bond      Government    Maturity        Yield     Tax-exempt       Cash
                                                       Series        Series    Bond Series     Series        Fund          Fund
                                                    ------------  -----------  -----------  -----------  ------------  -------------
<S>                                                  <C>            <C>          <C>          <C>          <C>            <C>       
INVESTMENT INCOME:
        Interest ...............................     $5,127,816     $630,773     $468,723     $656,148     $1,182,900     $2,754,633

EXPENSES:
        Management fees ........................        338,609       42,687       27,818       41,748        115,812        238,616
        Custodian fees .........................         21,291         --          2,025        1,099          1,344          5,633
        Transfer/maintenance fees ..............        108,817       18,944        5,226        8,425         15,105        119,258
        Administration fees ....................         60,950        7,684        5,543        6,557         20,846         21,990
        Directors' fees ........................          4,915          941          504          292          9,459          9,581
        Professional fees ......................          5,889        8,642        5,558        6,934          6,812          3,651
        Reports to shareholders ................          7,215        1,299          352           58            730          8,997
        Registration fees ......................         23,469          561        3,301       25,868         24,404          3,011
        Other expenses .........................          4,084          626          277        1,715            322          9,477
        12b-1 distribution plan fees ...........        221,713       27,378       22,183       43,045         14,509             --
                                                     ----------     --------     --------     --------     ----------     ----------
                                                        796,952      108,762       72,787      135,741        209,343        420,214

Less:  Earnings credits applied ................           --           --         (2,025         --           (1,344           --
       Reimbursement of expenses ...............        (17,462)     (42,687)     (30,621)     (41,748)          --             --
                                                     ----------     --------     --------     --------     ----------     ----------
       Total expenses ..........................        779,490       66,075       40,141       93,993        207,999        420,214
                                                     ----------     --------     --------     --------     ----------     ----------
          Net investment income ................      4,348,326      564,698      428,582      562,155        974,901      2,334,419

NET REALIZED AND UNREALIZED GAIN (LOSS):

Net realized gain (loss) during the period on
        investments ............................       (819,146)      17,807       14,159      159,295        230,930           --
Net change in unrealized appreciation
        during the period on
        investments ............................      2,374,236      149,552       89,543      126,911        592,486           --
                                                     ----------     --------     --------     --------     ----------     ----------
          Net gain .............................      1,555,090      167,359      103,702      286,206        823,416           --
                                                     ----------     --------     --------     --------     ----------     ----------
            Net increase in net assets
              resulting from operations ........     $5,903,416     $732,057     $532,284     $848,361     $1,798,317     $2,334,419
                                                     ==========     ========     ========     ========     ==========     ==========
</TABLE>
                            See accompanying notes.

                                       22
<PAGE>
                       STATEMENT OF CHANGES IN NET ASSETS
                      For the Year Ended December 31, 1997
<TABLE>
<CAPTION>
                                                                      Security Income Fund
                                                   ---------------------------------------------------
                                                    Corporate       U.S.        Limited        High       Security      Security
                                                       Bond      Government    Maturity        Yield     Tax-exempt       Cash
                                                      Series        Series    Bond Series     Series        Fund          Fund
                                                   ------------  -----------  -----------  -----------  ------------  -------------
<S>                                                <C>           <C>          <C>          <C>          <C>           <C>          
INCREASE IN NET ASSETS FROM OPERATIONS:
        Net investment income ...................  $  4,348,326  $   564,698  $   428,582  $   562,155  $    974,901  $   2,334,419
        Net realized gain (loss) ................      (819,146)      17,807       14,159      159,295       230,930           --
        Unrealized appreciation (depreciation)
                during the period ...............     2,374,236      149,552       89,543      126,911       592,486           --
                                                   ------------  -----------  -----------  -----------  ------------  -------------
                Net increase in net assets
                        resulting from operations     5,903,416      732,057      532,284      848,361     1,798,317      2,334,419

DISTRIBUTIONS TO SHAREHOLDERS FROM:
        Net investment income
                Class A .........................    (3,949,944)    (514,896)    (368,619)    (321,919)     (930,144)    (2,334,419)
                Class B .........................      (403,170)     (46,196)     (56,487)    (241,725)      (47,364)          --
        Net realized gain
                Class A .........................          --           --           --        (67,514)         --             --
                Class B .........................          --           --           --        (57,795)         --             --
                                                   ------------  -----------  -----------  -----------  ------------  -------------
                        Total distributions to
                                shareholders ....    (4,353,114)    (561,092)    (425,106)    (688,953)     (977,508)    (2,334,419)

CAPITAL SHARE TRANSACTIONS (a):
        Proceeds from sale of shares
                Class A .........................     7,162,943    1,566,140    1,371,189    2,272,583     2,482,623    234,698,276
                Class B .........................     4,821,878      684,955      399,599    1,441,420     1,198,639           --
        Dividends reinvested
                Class A .........................     2,918,082      427,733      329,483      389,121       493,192      2,203,684
                Class B .........................       363,965       40,597       56,486      298,860        31,059           --
        Shares redeemed
                Class A .........................   (28,343,679)  (2,531,194)  (1,243,300)    (358,981)   (5,087,737)  (224,791,899)
                Class B .........................    (6,157,206)    (314,008)    (175,370)     (90,052)     (455,776)          --
                                                   ------------  -----------  -----------  -----------  ------------  -------------
                Net increase (decrease)
                        from capital share
                        transactions ............   (19,234,017)    (125,777)     738,087    3,952,951    (1,338,000)    12,110,061
                                                   ------------  -----------  -----------  -----------  ------------  -------------
                        Total increase (decrease)
                           in net assets ........   (17,683,715)      45,188      845,265    4,112,359      (517,191)    12,110,061
NET ASSETS:
        Beginning of period .....................    80,663,645    8,697,399    5,698,909    5,499,106    24,814,503     45,330,724
                                                   ------------  -----------  -----------  -----------  ------------  -------------
        End of period ...........................  $ 62,979,930  $ 8,742,587  $ 6,544,174  $ 9,611,465  $ 24,297,312  $  57,440,785
                                                   ============  ===========  ===========  ===========  ============  =============
Undistributed net investment income
        at end of period ........................  $     22,204  $     3,764  $     4,097  $      --    $      2,952  $        --
                                                   ============  ===========  ===========  ===========  ============  =============
        (a) Shares issued and redeemed
                Shares sold
                        Class A .................     1,036,267      329,947      136,018      146,171       251,471    234,698,276
                        Class B .................       691,990      144,444       39,239       91,689       120,884           --
                Dividends reinvested
                        Class A .................       425,158       90,953       32,458       24,910        49,419      2,203,684
                        Class B .................        52,774        8,630        5,576       19,160         3,160           --
                Shares redeemed
                        Class A .................    (4,129,146)    (535,552)    (122,325)     (22,867)     (519,951)  (224,791,899)
                        Class B .................      (886,785)     (66,308)     (17,298)      (5,669)      (46,659)          --
                                                   ------------  -----------  -----------  -----------  ------------  -------------
                        Net increase (decrease) .    (2,809,742)     (27,886)      73,668      253,394      (141,676)    12,110,061
                                                   ============  ===========  ===========  ===========  ============  =============
</TABLE>
                            See accompanying notes.

                                       23
<PAGE>
                       STATMENT OF CHANGES IN NET ASSETS
                      For the Year Ended December 31, 1996
<TABLE>
<CAPTION>
                                                                  Security Income Fund
                                                 ----------------------------------------------------
                                                  Corporate        U.S.        Limited         High       Security      Security
                                                     Bond       Government     Maturity        Yield     Tax-exempt       Cash
                                                    Series        Series      Bond Series     Series        Fund          Fund
                                                 ------------   -----------   -----------  -----------  ------------  -------------
<S>                                             <C>            <C>            <C>           <C>          <C>           <C>         
INCREASE (DECREASE) IN NET ASSETS
 FROM OPERATIONS:
        Net investment income ................  $  5,712,167   $    685,751   $   351,230   $  151,652   $ 1,153,538   $  2,158,130
        Net realized gain (loss) .............    (1,347,012)       182,946       (46,509)     (36,585)       56,324           --
        Unrealized appreciation
                (depreciation) during the
                period .......................    (5,522,985)      (735,463)     (186,260)     147,067      (671,331)          --
                                                ------------   ------------   -----------   ----------   -----------   ------------
                Net increase (decrease) in net
                        assets resulting from
                        operations ...........    (1,157,830)       133,234       118,461      262,134       538,531      2,158,130
DISTRIBUTIONS TO SHAREHOLDERS FROM:
        Net investment income
                        Class A ..............    (5,393,982)      (655,579)     (304,962)     (79,996)   (1,107,445)    (2,158,130)
                        Class B ..............      (343,417)       (32,686)      (47,156)     (70,935)      (44,319)          --
Tax return of capital
                        Class A ..............          --             --          (5,684)        --            --             --
                        Class A ..............          --             --            (879)        --            --             --
                                                ------------   ------------   -----------   ----------   -----------   ------------
                Total distributions to
                        shareholders .........    (5,737,399)      (688,265)     (358,681)    (150,931)   (1,151,764)    (2,158,130)
CAPITAL SHARE TRANSACTIONS (a):
Proceeds from sale of shares
                Class A ......................     8,731,109      1,930,782     2,444,146    2,644,208     1,613,431    310,586,017
                Class B ......................     3,464,361        375,419       269,401    2,611,381       579,929           --
Dividends reinvested
                Class A ......................     4,241,649        543,532       284,749       79,998       626,193      1,969,086
                Class B ......................       304,987         26,151        47,452       70,935        31,495           --
Cost of shares redeemed
                        Class A ..............   (26,834,054)    (3,998,800)     (913,142)         (48)   (3,379,177)   305,382,279)
                        Class B ..............    (1,793,517)      (286,899)     (267,281)     (18,571)     (260,053)          --
                                                ------------   ------------   -----------   ----------   -----------   ------------
        Net increase (decrease)
            from capital share
            transactions .....................   (11,885,465)    (1,409,815)    1,865,325    5,387,903      (788,182)     7,172,824
                                                ------------   ------------   -----------   ----------   -----------   ------------
Total increase (decrease)
            in net assets ....................   (18,780,694)    (1,964,846)    1,625,105    5,499,106    (1,401,415)     7,172,824

NET ASSETS:
        Beginning of period ..................    99,444,339     10,662,245     4,073,804         --      26,215,918     38,157,900
                                                ------------   ------------   -----------   ----------   -----------   ------------
        End of period ........................  $ 80,663,645   $  8,697,399   $ 5,698,909   $5,499,106   $24,814,503   $ 45,330,724
                                                ============   ============   ===========   ==========   ===========   ============
Undistributed net
        investment income at
          end of period ......................  $       --     $        158   $      --     $      721   $     5,559   $       --
                                                ============   ============   ===========   ==========   ===========   ============
        (a) Shares issued and redeemed
                Shares sold
                        Class A ..............     1,257,439        408,653       236,285      176,201       167,132    310,586,017
                        Class B ..............       497,238         79,022        25,885      174,028        59,521           --
                Dividends reinvested
                        Class A ..............       608,432        115,124        27,590        5,270        65,031      1,969,086
                        Class B ..............        43,584          5,533         4,593        4,677         3,268           --
                Shares redeemed
                        Class A ..............    (3,860,010)      (845,356)      (88,496)          (3)     (350,952)  (305,382,279)
                        Class B ..............      (256,329)       (61,304)      (25,864)      (1,226)      (27,117)          --
                                                ------------   ------------   -----------   ----------   -----------   ------------
                Net increase (decrease) ......    (1,709,646)      (298,328)      179,993      358,947       (83,117)     7,172,824
                                                ============   ============   ===========   ==========   ===========   ============
</TABLE>
*Period August 5, 1996 (inception) through December 31, 1996.

                            See accompanying notes.

                                       24
<PAGE>
                              FINANCIAL HIGHLIGHTS

Selected data for each share of capital stock outstanding throughout each period

CORPORATE BOND SERIES (CLASS A)
<TABLE>
<CAPTION>
                                                                            Fiscal Period Ended December 31
                                                     -----------------------------------------------------------------------------
                                                        1997(d)          1996(d)(f)         1995(d)(f)      1994          1993
                                                     -----------        -----------        -----------   -----------   -----------
<S>                                                  <C>                <C>                <C>           <C>           <C>      
PER SHARE DATA
NET ASSET VALUE BEGINNING OF PERIOD ...............  $      6.87        $      7.39        $      6.68   $      7.81   $      7.72

INCOME FROM INVESTMENT OPERATIONS:
Net Investment Income .............................         0.45               0.47               0.47          0.49          0.52
Net Gain (Loss) on Securities
        (realized & unrealized) ...................         0.19              (0.52)              0.71         (1.13)         0.52
                                                     -----------        -----------        -----------   -----------   -----------
Total from Investment Operations ..................         0.64              (0.05)              1.18         (0.64)         1.04

LESS DISTRIBUTIONS
Dividends (from Net Investment Income) ............        (0.46)             (0.47)             (0.47)        (0.49)        (0.53)
Distributions (from Capital Gains) ................         --                 --                 --            --           (0.42)
                                                     -----------        -----------        -----------   -----------   -----------
        Total Distributions .......................        (0.46)             (0.47)             (0.47)        (0.49)        (0.95)
                                                     -----------        -----------        -----------   -----------   -----------
NET ASSET VALUE END OF PERIOD .....................  $      7.05        $      6.87        $      7.39   $      6.68   $      7.81
                                                     -----------        -----------        -----------   -----------   -----------
TOTAL RETURN (a) ..................................          9.7%              (0.5%)             18.2%         (8.3%)        13.4%

RATIOS/SUPPLEMENTAL DATA
Net Assets End of Period (thousands) ..............  $    56,487        $    73,360        $    93,701   $    90,593   $   118,433
Ratio of Expenses to Average Net Assets ...........         1.07%              1.01%              1.02%         1.01%         1.02%
Ratio of Net Investment Income (Loss)
        to Average Net Assets .....................         6.50%              6.54%              6.62%         6.91%         6.46%
Portfolio Turnover Rate ...........................          120%               292%               200%          204%          157%

CORPORATE BOND SERIES (CLASS B)
                                                                               Fiscal Period Ended December 31
                                                         -------------------------------------------------------------------------
                                                          1997(c)(d)     1996(c)(d)(f)   1995(c)(d)(f)      1994(c)       1993(b)
                                                         ---------       ---------       ---------       ---------       ---------
PER SHARE DATA
NET ASSET VALUE BEGINNING OF PERIOD ................     $    6.90       $    7.43       $    6.71       $    7.84       $    8.59

INCOME FROM INVESTMENT OPERATIONS:
Net Investment Income ..............................          0.40            0.40            0.40            0.43            0.11
Net Gain (Loss) on Securities
        (realized & unrealized) ....................          0.19           (0.52)           0.73           (1.13)          (0.32)
                                                         ---------       ---------       ---------       ---------       ---------
Total from Investment Operations ...................          0.59           (0.12)           1.13           (0.70)          (0.21)

LESS DISTRIBUTIONS
Dividends (from Net Investment Income) .............         (0.40)          (0.41)          (0.41)          (0.43)          (0.11)
Distributions (from Capital Gains) .................          --              --              --              --              0.43)
                                                         ---------       ---------       ---------       ---------       ---------
        Total Distributions ........................         (0.40)          (0.41)          (0.41)          (0.43)          (0.54)
                                                         ---------       ---------       ---------       ---------       ---------
NET ASSET VALUE END OF PERIOD ......................     $    7.09       $    6.90       $    7.43       $    6.71       $    7.84
                                                         =========       =========       =========       =========       =========
TOTAL RETURN(a) ....................................           8.7%           (1.4%)          17.3%           (9.0%)          (2.5%)

RATIOS/SUPPLEMENTAL DATA
Net Assets End of Period (thousands) ...............     $   6,493       $   7,303       $   5,743       $   3,878       $   1,022
Ratio of Expenses to Average Net Assets ............          1.85%           1.85%           1.85%           1.85%           1.88%
Ratio of Net Investment Income (Loss)
        to Average Net Assets                                 5.72%           5.70%           5.80%           6.08%           5.16%
Portfolio Turnover Rate                                        120%            292%            200%            204%            164%
</TABLE>
                            See accompanying notes.

                                       25
<PAGE>
                              FINANCIAL HIGHLIGHTS
Selected data for each share of capital stock outstanding throughout each period

U.S. GOVERNMENT SERIES (CLASS A)
<TABLE>
<CAPTION>
                                                                                  Fiscal Period Ended December 31
                                                          ------------------------------------------------------------------------
                                                          1997(c)(d)(f)   1996(c)(d)(f)   1995(c)(d)(f)     1994(c)      1993(c)
                                                          ----------      ----------      ----------      ----------    ----------
<S>                                                       <C>             <C>             <C>             <C>           <C>       
PER SHARE DATA
NET ASSET VALUE BEGINNING OF PERIOD .................     $     4.71      $     4.97      $     4.35      $     4.97    $     5.04

INCOME FROM INVESTMENT OPERATIONS:
Net Investment Income ...............................           0.32            0.31            0.30            0.30          0.31
Net Gain (Loss) on Securities
        (realized & unrealized) .....................            .10           (0.26)           0.62           (0.62)         0.27
                                                          ----------      ----------      ----------      ----------    ----------
Total from Investment Operations ....................           0.42            0.05            0.92           (0.32)         0.58

LESS DISTRIBUTIONS
Dividends (from Net Investment Income) ..............          (0.32)          (0.31)          (0.30)          (0.30)        (0.31)
Distributions (from Capital Gains) ..................           --              --              --              --           (0.34)
                                                          ----------      ----------      ----------      ----------    ----------
        Total Distributions .........................          (0.32)          (0.31)          (0.30)          (0.30)        (0.65)
                                                          ----------      ----------      ----------      ----------    ----------
NET ASSET VALUE END OF PERIOD .......................     $     4.81      $     4.71      $     4.97      $     4.35    $     4.97
                                                          ==========      ==========      ==========      ==========    ==========
TOTAL RETURN (a) ....................................            9.2%            1.3%           21.9%           (6.5%)        10.9%

RATIOS/SUPPLEMENTAL DATA
Net Assets End of Period (thousands) ................     $    7,652      $    8,036      $   10,080      $    8,309    $   10,098
Ratio of Expenses to Average Net Assets .............           0.60%           0.65%           1.11%           1.10%         1.10%
Ratio of Net Investment Income (Loss)
        to Average Net Assets .......................           6.10%           6.44%           6.41%           6.47%         5.90%
Portfolio Turnover Rate .............................             39%             75%             81%            220%          153%

U.S. GOVERNMENT SERIES (CLASS B)
                                                                              Fiscal Period Ended December 31
                                                       ----------------------------------------------------------------------------
                                                       1997(c)(d)      1996(c)(d)(f)     1995(c)(d)(f)     1994(c)        1993(b)(c)
                                                       ---------         ---------       ---------       ---------       ---------
PER SHARE DATA
NET ASSET VALUE BEGINNING OF PERIOD ..............     $    4.71         $    4.97       $    4.35       $    4.97       $    5.51

INCOME FROM INVESTMENT OPERATIONS:
Net Investment Income ............................          0.26              0.25            0.26            0.26            0.04
Net Gain (Loss) on Securities
        (realized & unrealized) ..................          0.10             (0.25)           0.63           (0.62)          (0.19)
                                                       ---------         ---------       ---------       ---------       ---------
Total from Investment Operations .................          0.36             (0.00)           0.89           (0.36)          (0.15)

LESS DISTRIBUTIONS
Dividends (from Net Investment Income) ...........         (0.27)            (0.26)          (0.27)          (0.26)          (0.04)
Distributions (from Capital Gains) ...............          --                --              --              --             (0.35)
                                                       ---------         ---------       ---------       ---------       ---------
        Total Distributions ......................         (0.27)            (0.26)          (0.27)          (0.26)          (0.39)
                                                       ---------         ---------       ---------       ---------       ---------
NET ASSET VALUE END OF PERIOD ....................     $    4.80         $    4.71       $    4.97       $    4.35       $    4.97
                                                       =========         =========       =========       =========       =========
TOTAL RETURN (a) .................................           7.9%           (0.02%)          20.9            (7.4%)          (1.4%)

RATIOS/SUPPLEMENTAL DATA
Net Assets End of Period (thousands) .............     $   1,091         $     661       $     582       $     321       $     140
Ratio of Expenses to Average Net Assets ..........          1.68%             1.86%           1.87%           1.85%           1.61%
Ratio of Net Investment Income (Loss)
        to Average Net Assets ....................          5.02%             5.23%           5.69%           5.76%           5.54%
Portfolio Turnover Rate ..........................            39%               75%             81%            220%            114%
</TABLE>
                            See accompanying notes.

                                       26
<PAGE>
                              FINANCIAL HIGHLIGHTS

Selected data for each share of capital stock outstanding throughout each period
Limited Maturity Bond Series (Class B)
<TABLE>
<CAPTION>
                                                             Fiscal Period Ended December 31
                                                  ----------------------------------------------------
                                                   1997(c)(d)(f)     1996(c)(d)(f)     1995(c)(d)(e)(f)
                                                  --------------     --------------     --------------
<S>                                               <C>                <C>                <C>           
NET ASSET VALUE BEGINNING OF PERIOD ...........   $        10.14     $        10.66     $        10.00

INCOME FROM INVESTMENT OPERATIONS:
Net Investment Income .........................             0.72               0.72               0.62
Net Gain (Loss) on Securities
        (realized & unrealized) ...............             0.16              (0.51)              0.65
                                                  --------------     --------------     --------------
Total from Investment Operations ..............             0.88               0.21               1.27
LESS DISTRIBUTIONS
Dividends (from Net Investment Income) ........            (0.72)             (0.72)             (0.61)
Distributions (from Capital Gains) ............             --                 --                 --
Return of Capital .............................             --                (0.01)              --
                                                  --------------     --------------     --------------
        Total Distributions ...................            (0.72)             (0.73)             (0.61)
                                                  --------------     --------------     --------------
NET ASSET VALUE END OF PERIOD .................   $        10.30     $        10.14     $        10.66
                                                  ==============     ==============     ==============
TOTAL RETURN (a) ..............................              9.0%               2.1%              13.0%

RATIOS/SUPPLEMENTAL DATA
Net Assets End of Period (thousands) ..........   $        5,490     $        4,938     $        3,322
Ratio of Expenses to Average Net Assets .......             0.55%              0.90%              0.84%
Ratio of Net Investment Income (Loss)
        to Average Net Assets .................             7.10%              6.97%              5.97%
Portfolio Turnover Rate .......................               76%               105%                 4%


LIMITED MATURITY BOND SERIES (CLASS B)
                                                        Fiscal Period Ended December 31
                                               ---------------------------------------------------
                                               1997(c)(d)(f)    1996(c)(d)(f)     1995(c)(d)(e)(f)
                                               -------------    -------------     ----------------
PER SHARE DATA
NET ASSET VALUE BEGINNING OF PERIOD ...........   $ 10.14           $ 10.67           $ 10.00

INCOME FROM INVESTMENT OPERATIONS:                                                   
        Net Investment Income .................      0.61              0.63              0.53
        Net Gain (Loss) on Securities                                                
                (realized & unrealized) .......      0.14             (0.52)             0.66
                                                  -------           -------           -------
        Total from Investment Operations ......      0.75              0.11              1.19
                                                                                     
LESS DISTRIBUTIONS                                                                   
Dividends (from Net Investment Income) ........     (0.62)            (0.62)            (0.52)         
Distributions (from Capital Gains) ............      --                --                --
                                                                                     
Return of Capital .............................      --               (0.01)             --
                                                  -------           -------           -------
Total Distributions ...........................     (0.62)            (0.64)            (0.52)
                                                  -------           -------           -------
NET ASSET VALUE END OF PERIOD .................   $ 10.27           $ 10.14           $ 10.67
                                                  =======           =======           =======
TOTAL RETURN (a) ..............................       7.7%              1.1%             12.2%
                                                                                     
RATIOS/SUPPLEMENTAL DATA                                                             
Net Assets End of Period (thousands) ..........   $ 1,054           $   761           $   752
Ratio of Expenses to Average Net Assets .......      1.50%             1.88%             1.71%
Ratio of Net Investment Income (Loss)                                                
        to Average Net Assets .................      6.15%             5.99%             5.12%
Portfolio Turnover Rate .......................        76%              105%                4%
</TABLE>
                            See accompanying notes.
                                                                               
                                       27
<PAGE>
                              FINANCIAL HIGHLIGHTS
Selected data for each share of capital stock outstanding throughout each period

HIGH YIELD SERIES (CLASS A)
<TABLE>
<CAPTION>
                                                            Fiscal Period 
                                                           Ended December 31
                                                       -------------------------
                                                       1997(c)(d)  1996(c)(d)(g)
                                                       ----------  -------------
<S>                                                    <C>           <C>      
PER SHARE DATA
NET ASSET VALUE BEGINNING OF PERIOD ................   $   15.32     $   15.00

INCOME FROM INVESTMENT OPERATIONS:
Net Investment Income ..............................        1.25          0.45
Net Gain (Loss) on Securities
        (realized & unrealized) ....................        0.60          0.32
                                                       ---------     ---------
                Total from Investment Operations ...        1.85          0.77

LESS DISTRIBUTIONS
Dividends (from Net Investment Income) .............       (1.25)        (0.45)
Distributions (from Capital Gains) .................       (0.21)         --
                                                       ---------     ---------
        Total Distributions ........................       (1.46)        (0.45)
                                                       ---------     ---------
NET ASSET VALUE END OF PERIOD ......................   $   15.71     $   15.32
                                                       =========     =========
TOTAL RETURN (a) ...................................        12.6%          5.2%

RATIOS/SUPPLEMENTAL DATA
Net Assets End of Period (thousands) ...............   $   5,179     $   2,780
Ratio of Expenses to Average Net Assets ............        0.87%         1.54%
Ratio of Net Investment Income (Loss)
        to Average Net Assets ......................        8.14%         7.47%
Portfolio Turnover Rate ............................          87%          168%

HIGH YIELD SERIES (CLASS B)
                                                           Fiscal Period 
                                                          Ended December 31
                                                       ------------------------
                                                       1997(c)(d)  1996(c)(d)(g)
                                                       ---------     ---------
PER SHARE DATA
NET ASSET VALUE BEGINNING OF PERIOD ................   $   15.32     $   15.00

INCOME FROM INVESTMENT OPERATIONS:
Net Investment Income ..............................        1.10          0.41
Net Gain (Loss) on Securities
        (realized & unrealized) ....................        0.59          0.32
                                                       ---------     ---------

Total from Investment Operations ...................        1.69          0.73
LESS DISTRIBUTIONS
Dividends (from Net Investment Income) .............       (1.12)        (0.41)
Distributions (from Capital Gains) .................       (0.21)          --
                                                       ---------     ---------
        Total Distributions ........................       (1.33)        (0.41)
                                                       ---------     ---------
NET ASSET VALUE END OF PERIOD ......................   $   15.68     $   15.32
                                                       =========     =========
TOTAL RETURN (a) ...................................        11.5%          4.9%

RATIOS/SUPPLEMENTAL DATA
Net Assets End of Period (thousands) ...............   $   4,432     $   2,719
Ratio of Expenses to Average Net Assets ............        1.80%         2.26%
Ratio of Net Investment Income (Loss)
        to Average Net Assets ......................        7.21%         6.74%
Portfolio Turnover Rate ............................          87%          168%
</TABLE>
                             See accompanying notes.

                                       28
<PAGE>
                              FINANCIAL HIGHLIGHTS
Selected data for each share of capital stock outstanding throughout each period

SECURITY TAX-EXEMPT FUND (CLASS A)
<TABLE>
<CAPTION>
                                                                                 Fiscal Period Ended December 31
                                                        --------------------------------------------------------------------------
                                                        1997(c)(d)   1996(c)(d)(f)  1995(c)(d)(f)        1994               1993
                                                        ----------   -------------  -------------        ----               ----
<S>                                                     <C>           <C>           <C>               <C>               <C>       
PER SHARE DATA
NET ASSET VALUE BEGINNING OF PERIOD ..............      $     9.72    $     9.94    $     9.05        $    10.37        $    10.06

INCOME FROM INVESTMENT OPERATIONS:
Net Investment Income ............................            0.42          0.45          0.48              0.47              0.51
Net Gain (Loss) on Securities
        (realized & unrealized) ..................            0.36         (0.21)         0.89             (1.32)             0.70
                                                        ----------    ----------    ----------        ----------        ----------
Total from Investment Operations .................            0.78          0.24          1.37             (0.85)             1.21

LESS DISTRIBUTIONS
Dividends (from Net Investment Income) ...........           (0.42)        (0.46)        (0.48)            (0.47)            (0.51)
Distributions (from Capital Gains) ...............            --            --            --                --               (0.39)
                                                        ----------    ----------    ----------        ----------        ----------
        Total Distributions ......................           (0.42)        (0.46)        (0.48)            (0.47)            (0.90)
                                                        ----------    ----------    ----------        ----------        ----------
NET ASSET VALUE END OF PERIOD ....................      $    10.08    $     9.72    $     9.94        $     9.05        $    10.37
                                                        ==========    ==========    ==========        ==========        ==========
TOTAL RETURN (a) .................................             8.3%          2.5%         15.5%             (8.3%)            11.6%

RATIOS/SUPPLEMENTAL DATA
Net Assets End of Period (thousands) .............      $   21,953    $   23,304     $   25,026        $   24,092        $   32,115
Ratio of Expenses to Average Net Assets ..........            0.82%         0.78%         0.86%             0.82%             0.82%
Ratio of Net Investment Income (Loss)
        to Average Net Assets ....................            4.29%         4.67%         5.02%             4.74%             4.92%
Portfolio Turnover Rate ..........................              48%           54%          103%               88%              118%

SECURITY TAX-EXEMPT FUND (CLASS B)
                                                                                 Fiscal Period Ended December 31
                                                        --------------------------------------------------------------------------
                                                        1997(c)(d)   1996(c)(d)(f)  1995(c)(d)(f)          1994(c)       1993(b)
                                                       ----------   -------------  -------------          -------       --------
PER SHARE DATA
NET ASSET VALUE BEGINNING OF PERIOD ...............    $    9.73        $    9.95        $    9.05        $   10.37      $   10.88

INCOME FROM INVESTMENT OPERATIONS:
Net Investment Income .............................         0.29             0.33             0.48             0.35           0.10
Net Gain (Loss) on Securities
        (realized & unrealized) ...................         0.37            (0.21)            0.89            (1.32)         (0.13)
                                                       ---------        ---------        ---------        ---------      ---------
Total from Investment Operations ..................         0.66             0.12             1.37            (0.97)         (0.03)

LESS DISTRIBUTIONS
Dividends (from Net Investment Income) ............        (0.31)           (0.34)           (0.48)           (0.35)         (0.09)
Distributions (from Capital Gains) ................         --               --               --               --            (0.39)
                                                       ---------        ---------        ---------        ---------      ---------
        Total Distributions .......................        (0.31)           (0.34)           (0.48)           (0.35)         (0.48)
                                                       ---------        ---------        ---------        ---------      ---------
NET ASSET VALUE END OF PERIOD .....................    $   10.08        $    9.73        $    9.94        $    9.05      $   10.37
                                                       =========        =========        =========        =========      =========
TOTAL RETURN (a) ..................................          6.9%             1.2%            14.3%            (9.5%)         (0.2%)

RATIOS/SUPPLEMENTAL DATA
Net Assets End of Period (thousands) ..............    $   2,344        $   1,510        $   1,190        $     760      $     106
Ratio of Expenses to Average Net Assets ...........         2.00%            2.01%            2.00%            2.00%          2.89%
Ratio of Net Investment Income (Loss)
        to Average Net Assets .....................         3.11%            3.44%            3.90%            3.50%          2.71%
Portfolio Turnover Rate ...........................           48%              54%             103%              88%            90%
</TABLE>
                             See accompanying notes.

                                       29
<PAGE>
                              FINANCIAL HIGHLIGHTS
Selected data for each share of capital stock outstanding throughout each period

SECURITY CASH FUND
<TABLE>
<CAPTION>
                                                                                       Fiscal Period Ended December 31
                                                                     -------------------------------------------------------------
                                                                    1997 (d)    1996(c)(d)(f)  1995(c)(d)(f)    1994         1993(c)
                                                                    --------    -------------  -------------    ----         -------
<S>                                                                  <C>         <C>             <C>           <C>         <C>    
PER SHARE DATA
NET ASSET VALUE BEGINNING OF PERIOD ..........................       $1.00       $  1.00         $1.00         $1.00       $  1.00

INCOME FROM INVESTMENT OPERATIONS:
Net Investment Income ........................................        0.05          0.05          0.05          0.03          0.02
Net Gain (Loss) on Securities
        (realized & unrealized) ..............................        --            --            --            --            --

                                                                      ----          ----          ----          ----          ----
Total from Investment Operations .............................        0.05          0.05          0.05          0.03          0.02

LESS DISTRIBUTIONS
Dividends (from Net Investment Income) .......................       (0.05)        (0.05)        (0.05)        (0.03)        (0.02)
Distributions (from Capital Gains) ...........................        --            --            --            --            --
                                                                      ----          ----          ----          ----          ----
        Total Distributions ..................................       (0.05)        (0.05)        (0.05)        (0.03)        (0.02)
                                                                      ----          ----          ----          ----          ----
NET ASSET VALUE END OF PERIOD ................................       $1.00       $  1.00         $1.00         $1.00       $  1.00 
                                                                      ====          ====          ====          ====          ====
TOTAL RETURN (a) .............................................         4.9%          4.6%          5.0%          3.4%          2.4%

RATIOS/SUPPLEMENTAL DATA
Net Assets End of Period (thousands) .........................     $57,441       $45,331       $38,158       $58,102       $71,870
Ratio of Expenses to Average Net Assets ......................        0.90%         1.01%         1.00%         0.96%         1.00%
Ratio of Net Investment Income (Loss)
        to Average Net Assets ................................        4.80%         4.47%         5.00%         3.24%         2.28%
Portfolio Turnover Rate ......................................        --            --            --            --            --
</TABLE>
(a)  Total return information does not take into account any charges paid at
     time of purchase or contingent deferred sales charges paid at time of
     redemption.

(b)  Class "B" shares were initially issued on October 19, 1993. Percentage
     amounts for the period, except total return, have been annualized.

(c)  Fund expenses were reduced by the Investment Manager and expense ratios
     absent such reimbursement would have been as follows:

                                        1993    1994    1995    1996    1997 
                                        -----   -----   -----   -----   -----
      Corporate Bond Series   Class B   ___     2.00%   2.19%   2.05%   2.10%
      U.S. Government Series  Class A   1.20%   1.20%   1.22%   1.17%   1.06%
                              Class B   1.75%   2.91%   3.70%   3.26%   2.14%
      Limited Maturity        Class A   ___     ___     1.04%   1.40%   1.04%
       Bond Series            Class B   ___     ___     2.12%   2.60%   1.99%
      High Yield Series       Class A   ___     ___     ___     2.11%   1.44%
                              Class B   ___     ___     ___     2.83%   2.37%
      Tax-Exempt Fund         Class A   ___     ___     0.86%   0.78%   0.83%
                              Class B   ___     2.32%   2.45%   2.19%   2.00%
      Cash Fund                         1.03%   ___     1.04%   1.01%   ___
      
(d)  Net investment income was computed using the average month-end shares
     outstanding throughout the period.

(e)  Security Limited Maturity Bond Series was initially capitalized on January
     17, 1995, with a net asset value of $10 per share. Percentage amounts for
     period have been annualized, except for total return.

(f)  Expense ratios including reimbursements, were calculated without the
     reduction for custodian fees earnings credits beginning February 1, 1995.
     Expense ratios with such reductions would have been as follows:

                                        1995    1996    1997
                                        -----   -----   -----
      Corporate Bond Series   Class A   1.02%   1.01%   ___
                              Class B   1.85%   1.85%   ___
      U.S. Government Series  Class A   1.10%   0.64%   ___
                              Class B   1.85%   1.85%   ___
      Limited Maturity        Class A   0.81%   0.87%   0.51%
       Bond Series            Class B   1.65%   1.85%   1.46%
      Tax-Exempt Fund         Class A   0.85%   0.77%   0.83%
                              Class B   2.00%   2.00%   2.00%
      Cash Fund                         1.00%   1.00%   1.00%
                                     
(g)  Security High Yield Series was initially capitalized on August 15, 1996,
     with a net asset value of $15 per share. Percentage amounts for the period
     have been annualized, except for total return.

                             See accompanying notes.

                                       30
<PAGE>
                         NOTES TO FINANCIAL STATEMENTS
                               December 31, 1997

1. SIGNIFICANT ACCOUNTING POLICIES

     Security Income Fund, Security Tax-Exempt Fund and Security Cash Fund (the
Funds) are registered under the Investment Company Act of 1940, as amended, as
diversified open-end management investment companies. The shares of Security
Income Fund are currently issued in multiple series, with each series, in
effect, representing a separate Fund. The Income Fund is required to account for
each series separately and to allocate general expenses to each series based on
the net asset value of each series. Class A shares are sold with a sales charge
at the time of purchase. Class A shares are not subject to a sales charge when
they are redeemed. The Funds began offering an additional class of shares ("B"
shares) on October 19, 1993. The shares are offered without a front-end sales
charge but incur additional class-specific expenses. Redemptions of the shares
within five years of acquisition incur a contingent deferred sales charge. The
following is a summary of the significant accounting policies followed by the
Funds in the preparation of their financial statements. These policies are in
conformity with generally accepted accounting principles.

     A. SECURITY VALUATION - Valuations of Income Funds' and Tax-Exempt Fund's
securities are supplied by pricing services approved by the Board of Directors.
Securities listed or traded on a national securities exchange are valued on the
basis of the last sales price. If there are no sales on a particular day, then
the securities are valued at the last bid price. Securities for which market
quotations are not readily available are valued by a pricing service considering
securities with similar yields, quality, type of issue, coupon, duration and
rating. If there is no bid price or if the bid price is deemed to be
unsatisfactory by the Board of Directors or by the Funds' investment manager,
then the securities are valued in good faith by such method as the Board of
Directors determines will reflect the fair value. The Funds' officers, under the
general supervision of the Board of Directors, regularly review procedures used
by, and valuations provided by, the pricing service.

     Cash Fund, by approval of the Board of Directors, utilizes the amortized
cost method for valuing portfolio securities, whereby all investments are valued
by reference to their acquisition cost as adjusted for amortization of premium
or accretion of discount.

     B. OPTIONS - The High Yield Series may purchase put and call options and
write such options on a covered basis on securities that are traded on
recognized securities exchanges and over-the-counter markets. Call and put
options on securities give the holder the right to purchase or sell,
respectively (and the writer the obligation to sell or purchase), a security at
a specified price, until a certain date. The primary risks associated with the
use of options are an imperfect correlation between the change in market value
of the securities held by the Series and the price of the option, the
possibility of an illiquid market, and the inability of the counter-party to
meet the terms of the contract.

     The premium received for a written option is recorded as an asset, with an
equal liability which is marked to market based on the option's quoted daily
settlement price. Fluctuation in the value of such instruments are recorded as
unrealized appreciation (depreciation) until terminated, at which time realized
gains and losses are recognized.
        
     C. SECURITY TRANSACTIONS AND INVESTMENT INCOME - Security transactions are
accounted for on the date the securities are purchased or sold. Realized gains
and losses are reported on an identified cost basis. Interest income is
recognized on the accrual basis. Premium and discounts (except original issue
discounts) on debt securities are not amortized, except Security Tax-Exempt Fund
which amortizes premiums. 

     D. DISTRIBUTIONS TO SHAREHOLDERS - Distributions to shareholders are
recorded on the ex-dividend date. The character of distributions made during the
year from net investment income or net realized gains may differ from their
ultimate characterization for federal income tax purposes. These differences are
primarily due to the recharacterization of foreign currency gains and losses.

     E. TAXES - The Funds complied with the requirements of the Internal Revenue
Code applicable to regulated investment companies and distributed all of their
taxable net income and net realized gains sufficient to relieve them from all,
or substantially all, federal income, excise and state income taxes. Therefore,
no provision for federal or state income tax is required.

     F. EARNINGS CREDITS - Under the fee schedule with the custodian, the Funds
earn credits based on overnight custody cash balances. These credits are
utilized to reduce related custodial expenses. The custodian fees disclosed in
the statement of operations do not reflect the reduction in expense from the
related earnings credits.

2. MANAGEMENT FEES AND OTHER TRANSACTIONS WITH AFFILIATES

        Management fees are payable to Security Management Company, LLC (SMC)
under investment advisory contracts at an annual rate of .50 of 1% of the
average net assets of each fund, except for the High Yield Series which fees are
 .60 of 1% of the average net assets of the Series. The investment advisory
contract for Income Fund provides that the total annual expenses of each Series
of the Fund (including management fees and custodian fees net of earnings
credits, but excluding interest, taxes, brokerage commissions, extraordinary
expenses and distribution fees paid under the Class B distribution plan) will
not exceed the level of expenses which Income Fund is permitted to bear under
the most restrictive expense limitation imposed by any state in which shares of
the Fund are then qualified for sale. For the period ended December 31, 1997,
SMC agreed to limit the total expenses of Corporate Bond Series, U.S. Government
Series and Limited Maturity Bond Series to an annual rate of 1.1% of the average
daily net asset value of Class A shares and 1.85% of Class B shares of each
respective Series. SMC also agreed to limit the total expenses of the High Yield
Series to 2.0% for Class A Shares and 2.75% for Class B shares. In addition, SMC
agreed to waive all of the management fees for the U.S. Government Series,
Limited Maturity Bond Series and the High Yield Series until December 31, 1997.
The investment advisory contract for Tax-Exempt and Cash Funds provides that the
total annual expenses of the Funds net of custodian fee earnings credits will
not exceed an amount equal to an annual rate of 1.0% of the average net assets
of Class A shares 

                                       31
<PAGE>
                    NOTES TO FINANCIAL STATEMENTS (continued)

and 2.0% of Class B shares of the Tax-Exempt Fund as calculated on a daily
basis.

     The Funds have entered into contracts with SMC for transfer agent services
and certain other administrative services which SMC provides to the Funds. SMC
is paid an annual fixed charge per account and shareholder and dividend
transaction fees.

     As the administrative agent for the Funds, SMC performs administrative
functions, such as regulatory filings, bookkeeping, accounting and pricing
functions for the Funds. For this service SMC receives on an annual basis, a fee
of .09% of the average daily net assets of Corporate Bond Series, U.S.
Government Series, Limited Maturity Bond Series, High Yield Series, and
Tax-Exempt Fund and .045% of the average daily net assets of Cash Fund
calculated daily and payable monthly.

     Income and Tax-Exempt Funds have adopted Distribution Plans related to the
offering of Class B shares pursuant to Rule 12b-1 of the Investment Company Act
of 1940. The Plans provide for payments at an annual rate of 1.0% of the average
net assets of Class B shares. Class A shares of Income Fund incur 12b-1
distribution fees at an annual rate of .25% of the average net assets of each
Series.

     Security Distributors, Inc. (SDI), a wholly-owned subsidiary of Security
Benefit Group, Inc., a financial services holding company, is national
distributor for Income and Tax-Exempt Funds. SDI received net underwriting
commissions on sales of Class A shares and contingent deferred sales charges
(CDSC) on redemptions occurring within 5 years of the date of purchase of Class
B shares, after allowances to brokers and dealers for the period ended December
31, 1997, in the amounts presented below:

                              Corporate    U.S.    Limited     High       Tax-
                                Bond    Government Maturity   Yield      Exempt
                               Series     Series    Series    Series      Fund
                               -------    ------    ------    -------    -------
SDI underwriting
     (Class A) ............    $ 5,221    $1,979    $2,232    $   736    $ 2,581
CDSC (Class B) ............    $15,849    $2,159    $  893    $ 1,161    $ 3,510
Broker/Dealer
     (Class A) ............    $21,438    $8,680    $9,614    $ 3,565    $ 9,830
Broker/Dealer
     (Class B) ............    $47,733    $5,878    $7,825    $16,593    $50,942

     Certain officers and directors of the Funds are also officers and/or
directors of Security Benefit Life Insurance Company and its subsidiaries, which
include SMC and SDI.

3. INVESTMENT TRANSACTIONS

     Investment transactions for the period ended December 31,1997, (excluding
overnight investments and short-term debt securities) were as follows:

                 Corporate       U.S.       Limited       High           Tax-
                   Bond       Government    Maturity      Yield         Exempt
                  Series        Series       Series       Series         Fund
                -----------   ----------   ----------   ----------   -----------
Purchases ...   $76,921,168   $3,386,846   $5,477,011   $9,882,654   $11,105,240
Proceeds from
    sales ...   $92,603,472   $3,222,884   $4,354,028   $6,018,681   $12,084,148

4. FEDERAL INCOME TAX MATTERS

     The amounts of unrealized appreciation (depreciation) as of December 31,
1997, were as follows:

                    Corporate       U.S.       Limited     High         Tax-
                      Bond       Government   Maturity     Yield       Exempt
                     Series        Series      Series      Series       Fund
                   -----------   ---------    ---------   ---------   ----------
Gross unrealized
    appreciation   $ 2,233,243   $ 311,175    $ 159,906   $ 291,154   $1,044,339
Gross unrealized
    depreciation       (64,621)        (34)      (6,813)    (17,176)        --
                   -----------   ---------    ---------   ---------   ----------
Net unrealized
    appreciation   $ 2,168,622   $ 311,141    $ 153,093   $ 273,978   $1,044,339

        At December 31, 1997, the following Funds had accumulated net realized
capital loss carryovers as shown:

                                                      Capital
                                                        Loss        Expiration
                                                     Carryover          Year
                                                    -----------     ------------
Corporate Bond Series .........................     $13,189,431     2002 to 2005
U.S. Government Series ........................         960,570         2002
Limited Maturity
  Bond Series .................................          62,591     2003 to 2004
Tax-Exempt Fund ...............................       1,246,957         2002

For federal income tax purposes, High Yield Series designated $56,465 as capital
gains dividends.

                                       32
<PAGE>
                         REPORT OF INDEPENDENT AUDITORS

To the Shareholders and Board of Directors
Security Income Fund, Security Tax-exempt Fund
and Security Cash Fund

     We have audited the accompanying balance sheets, including the schedules of
investments, of SecurityTax-Exempt Fund, Security Cash Fund and the following
series of Security Income Fund (Corporate Bond, U.S. Government, Limited
Maturity Bond and High Yield Series) (the Funds) as of December 31, 1997, and
the related statements of operations and changes in net assets and the financial
highlights for the periods indicated therein. These financial statements and the
financial highlights are the responsibility of the Funds management. Our
responsibility is to express an opinion on these financial statements and
financial highlights based on our audits.

     We have 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 the 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
investments owned as of December 31, 1997, by correspondence with the custodian.
As to securities relating to uncompleted transactions, we performed other audit
procedures. 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
each of the Funds indicated above at December 31, 1997, and the results of their
operations, changes in their net assets and the financial highlights for the
periods indicated therein in conformity with generally accepted accounting
principles.

                                                     /s/ ERNST & YOUNG LLP

Kansas City, Missouri
February 6, 1998

- --------------------------------------------------------------------------------
NOTICE:
IN THE FUTURE, YOU WILL RECEIVE ONLY ONE COPY PER ADDRESS OF THE PROSPECTUS,
SEMI-ANNUAL AND ANNUAL REPORTS. IF YOU WISH TO CONTINUE RECEIVING ONE FOR EACH
PRIMARY OWNER OF RECORD, WE ASK THAT YOU PLEASE SEND YOUR REQUEST IN WRITING TO
SECURITY BENEFIT, ATTN: PAT RIPPBERGER, 700 SW HARRISON ST., TOPEKA, KS
6636-0001
- --------------------------------------------------------------------------------
<PAGE>
THE SECURITY GROUP OF MUTUAL FUNDS             

Security Growth and Income Fund
Security Equity Fund

  o  Equity Series
  o  Global Series
  o  Asset Allocation Series
  o  Social Awareness Series
  o  Value Series
  o  Small Company Series

Security Ultra Fund
Security Income Fund
  
  o  Corporate Bond Series
  o  U.S. Government Series
  o  Limited Maturity Bond Series
  o  High Yield Series
  
Security Tax-Exempt Fund
Security Cash Fund

This report is submitted for the general information of the shareholders of the
Funds. The report is not authorized for distribution to prospective investors in
the Funds unless preceded or accompanied by an effective prospectus which
contains details concerning the sales charges and other pertinent information.

SECURITY FUNDS OFFICERS AND DIRECTORS

DIRECTORS

Donald A. Chubb, Jr.
John D. Cleland
Donald L. Hardesty
Bruce Jensen (Income Fund only)
Penny A. Lumpkin
Mark L. Morris, Jr., D.V.M.  
Maria Fiorini Ramirez (Income Fund only)
Hugh L. Thompson, Ph.D.

OFFICERS

John D. Cleland, President
James R. Schmank, Vice President and Treasurer
Mark E. Young, Vice President
Steven M. Bowser, Vice President
Jane A. Tedder, Vice President
Barbara J. Davison, Assistant Vice President
Thomas A. Swank, Vice President
Amy J. Lee, Secretary
Christopher D. Swickard, Assistant Secretary
Brenda M. Harwood, Assistant Treasurer and Assistant Secretary

[SECURITY DISTRIBUTORS, INC. LOGO]
        
SECURITY DISTRIBUTORS, INC.

700 SW Harrison St.
Topeka, KS 66636-0001
(785) 431-3127
(800) 888-2461  


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