Did you negotiate your offer? If you didn't, why not?

Neither.. you have no leverage as an undergrad and every firm pays roughly in line. You'd look like a clown trying to negotiate your FT offer (let alone your SA offer).

Didn’t bother for SA, briefly brought it up with HR for full-time and was told that they could go back to the group head and ask but that the offer was the same for all incoming IBD analysts. I let it go it after that.

You do realize that before you could even finish that sentence they would have another analyst waiting in line right behind you. I literally can't think of a job where you have less leverage as a first year or intern than IB

I know a fratty, loaded diversity kid that tried to leverage another offer for a signing bonus (for summer). Thought he was cheap.

I’ve heard they will just rescind your offer on the spot if you try to haggle so I never attempted to. I showed intentional, visible displeasure when my FT offer salary was stated on Zoom to see if they would adjust. It went something like “Wow, are you not excited?” “Oh no I appreciate the offer.” “Okay great, with some people we’re never sure. Anyways, you have 3 days to decide. [or else we’ll give it to the next guy]”

Pay at the analyst level is all standardized. You’ll look like a goober and HR will just say no. Even HR is smart enough to know not to run up the chain a request for an analyst that wants an extra $10k in base

I don't get it -- are there a lot of 22 years olds dissatisfied that they're about to make 130-170k their first year out of school?  

I can’t believe there are people who are this stupid and then complain about making 150k a year out of college 

I did not. The market for IB analysts is an oligopsony (few buyers, many sellers) and they're happy to just decline your counter-offer and grab the next person on the list.

If you get a contract, take it and run.