There is a (mildly) compelling reason for every bank to have a stupid password rule which is mutually incompatible with every site in existence But in my (pers

There is a (mildly) compelling reason for every bank to have a stupid password rule which is mutually incompatible with every site in existence But in my (personal, not professional) experience, they're not mutually incompatible. The bank and credit-card sites all restrict users to short, weak passwords, and it would be perfectly possible for me to use the same password on many of them.