The company withstood several bank runs during the Great Depression and, as a leading banker, Eccles became involved with the creation of the Emergency Banking Act of 1933 and the Federal Deposit Insurance Corporation.
Virksomheden modstod adskillige stormløb under Depressionen, og som førende bankmand blev den involveret i etableringen af Emergency Banking Act fra 1933 og Federal Deposit Insurance Corporation.