I've never worked on Wall Street, but are SC + trouser combos actually acceptable? I would have thought a typical work uniform would be a navy or charcoal suit.
Probably should cc' @gdl203 since he actually worked there.
There is a pretty broad range of what is acceptable. I would say the i-bankers generally dress as you suggest, although there are some clients that are pretty casual and where those items would look out of place and the i-bankers adjust. I would say that the large law firms generally dress as you suggest but permit quite a bit of personal variation. I would say that the alternative investment firms have absolutely no rules outside of those who are marketing, and they dress "up", but that can mean anything from the suits you suggest to a jacket/tie combo to - the worst look in the world - the suit with no tie.