The small businessman's loan fund and at least three-fourths (3/4) of the guaranty fee fund shall be invested in interest-bearing notes or savings accounts for the highest possible yield as determined by the committee. However, not more than ten percent (10%) of the combined total of the two (2) funds shall be invested in interest-bearing notes or savings accounts of the banks from which the two (2) executive bank officers are chosen to be members of the small businessman's loan committee according to Section 57-10-107.