<PAGE>
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and appoints
John D. Cleland, James R. Schmank and Brenda M. Harwood, and each of them his
true and lawful attorney-in-fact as agent with full power of substitution and
resubstitution of him in his name, place, and stead, to sign any and all
registration statements on Form N-1A applicable to the Security Funds, on behalf
of the SBL Fund, Security Equity Fund, Security Ultra Fund, Security Growth and
Income Fund, Security Cash Fund, Security Income Fund, Security Municipal Bond
Fund and Advisor's Fund, and any amendment or supplement thereto, and to file
the same with all exhibits thereto and other documents in connection therewith,
with the Securities and Exchange Commission, granting unto said attorney-in-fact
and agent full power and authority to do and perform each and every act and
thing requisite and necessary to be done, as fully to all intents and purposes
as he might or could do in person, hereby ratifying and confirming all that said
attorney-in-fact and agent, or his substitutes, may lawfully do or cause to be
done by virtue thereof.
IN WITNESS WHEREOF, I have hereunto set my hand this 5th day of May, 2000.
PENNY A. LUMPKIN
------------------------------
Penny A. Lumpkin
MARK L. MORRIS, JR.
------------------------------
Mark L. Morris, Jr.
DONALD A. CHUBB, JR.
------------------------------
Donald A. Chubb, Jr.
MAYNARD F. OLIVERIUS
------------------------------
Maynard F. Oliverius*
*Director of each Fund, except Advisor's Fund.
<PAGE>
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and appoints
John D. Cleland and Brenda M. Harwood, and each of them his true and lawful
attorney-in-fact as agent with full power of substitution and resubstitution of
him in his name, place, and stead, to sign any and all registration statements
on Form N-1A applicable to the Security Funds, on behalf of the SBL Fund,
Security Equity Fund, Security Ultra Fund, Security Growth and Income Fund,
Security Cash Fund, Security Income Fund, Security Municipal Bond Fund and
Advisor's Fund, and any amendment or supplement thereto, and to file the same
with all exhibits thereto and other documents in connection therewith, with the
Securities and Exchange Commission, granting unto said attorney-in-fact and
agent full power and authority to do and perform each and every act and thing
requisite and necessary to be done, as fully to all intents and purposes as he
might or could do in person, hereby ratifying and confirming all that said
attorney-in-fact and agent, or his substitutes, may lawfully do or cause to be
done by virtue thereof.
IN WITNESS WHEREOF, I have hereunto set my hand this 5th day of May, 2000.
JAMES R. SCHMANK
------------------------------
James R. Schmank
<PAGE>
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and appoints
James R. Schmank and Brenda M. Harwood, and each of them his true and lawful
attorney-in-fact as agent with full power of substitution and resubstitution of
him in his name, place, and stead, to sign any and all registration statements
on Form N-1A applicable to the Security Funds, on behalf of the SBL Fund,
Security Equity Fund, Security Ultra Fund, Security Growth and Income Fund,
Security Cash Fund, Security Income Fund, Security Municipal Bond Fund and
Advisor's Fund, and any amendment or supplement thereto, and to file the same
with all exhibits thereto and other documents in connection therewith, with the
Securities and Exchange Commission, granting unto said attorney-in-fact and
agent full power and authority to do and perform each and every act and thing
requisite and necessary to be done, as fully to all intents and purposes as he
might or could do in person, hereby ratifying and confirming all that said
attorney-in-fact and agent, or his substitutes, may lawfully do or cause to be
done by virtue thereof.
IN WITNESS WHEREOF, I have hereunto set my hand this 5th day of May, 2000.
JOHN D. CLELAND
------------------------------
John D. Cleland
