I would argue that this is not just banks but a number of different services. This entire Github repository [1] and this Twitter account [2] are dedicated to sites with dumb password rules. Passwords are not meant for humans.

Here is a link to a hackernews thread discussing the worst of the requirements in the repository is here [3].

[1] https://github.com/dumb-password-rules/dumb-password-rules

[2] https://twitter.com/dumb_pw_rules

[3] https://news.ycombinator.com/item?id=20890381