I am a senior in undergrad at a non-target in a bit of a predicament. This past summer, I completed a PB summer analyst program at a BB (think B of A, Credit Suisse) and received a return offer. Although I want to move into IB full-time, I accepted the PB offer because it had exploded early and I figured there was a high probability that it would be the best offer I'd be able to receive. I had applied to quite a few IB firms before the PB offer had exploded. Long story short, a MM IB shop (think Arma Partners, Cain Brothers) reached out to me for an interview a few weeks after I signed the PB offer and I ended up getting the superday and ultimately a FT offer. Now I am stuck in a situation: Do I move forward with the BB PB signed offer or renege it for the MM IB offer? If the former, do you think this because of the potential consequences of reneging? Or do you think there is a legitimate shot that I can lateral into IB from PB? If the latter, how would reneging reflect on my reputation? Is there a considerable risk that reneging will damage my reputation and have serious ramifications - have you seen a move like this pulled before? I'd appreciate any feedback.