Section 279.19 - Investment of funds(1) The authority may invest any funds in any of the following: (a) Bonds, notes, certificates of indebtedness, treasury bills, or other securities constituting direct obligations of the United States or obligations the principal and interest of which are guaranteed by the United States.(b) Certificates of deposit or time deposits constituting direct obligations of any bank that are insured by the federal deposit insurance corporation.(c) Certificates of deposit constituting direct obligations of any credit union that are insured by the national board, as defined in s. 186.01(3m).(d) Certificates of deposit constituting direct obligations of any savings and loan association or savings bank that are insured by the federal deposit insurance corporation.(e) Short-term discount obligations of the federal national mortgage association.(f) Any of the investments provided under s. 66.0603(1m) (a).(2) Any securities described in sub. (1) may be purchased at the offering or market price of the securities at the time of purchase.