Every stockholder in a banking corporation or institution shall be individually responsible and liable to its creditors, over and above the amount of stock by him or her held, to an amount equal to his or her respective shares so held for all of its liabilities, accruing while he or she remains such stockholder.*

*Codified Iowa Constitution, Art. VIII, §6 – 11 apply to banks of issue only, see 63 Iowa 11, 220 Iowa 794, and 221 Iowa 102