Loaning on its own shares.

Iowa Code § 524.531, under BANKS.

Iowa Code § 524.531

A state bank shall not make any loan or extension of credit on the security of the shares of its own capital, unless such security is necessary to prevent loss upon a debt previously contracted in good faith. [C97, §1850; S13, §1850; C24, 27, §9184; C31, 35, §9221-c2; C39, § 9221.2; C46, 50, 54, 58, 62, 66, §528.9; C71, 73, 75, 77, 79, 81, §524.507 ] 95 Acts, ch 148, §48 CS95, §524.531