Wis. Stat. § 219.09: Certain district and authority bonds as legal investments and security.

(1) A bank, trust company, savings bank or institution, savings and loan association, credit union or investment company or a personal representative, guardian, trustee or other fiduciary may legally invest any moneys or funds belonging to or within that person’s control in bonds issued by any of the following:

(a) A local exposition district under subch. II of ch. 229.

(b) The University of Wisconsin Hospitals and Clinics Authority.

(c) A local professional baseball park district created under subch. III of ch. 229.

(d) A local professional football stadium district created under subch. IV of ch. 229.

(f) Bonds issued by a local cultural arts district under subch. V of ch. 229.

(g) The Wisconsin Aerospace Authority.

(2) This section shall not be construed as relieving any person of any duty of exercising any required level of care in selecting securities.