Final Stages Interview - When will I get a response

Hi all, 

I recently interviewed for a role at an investment bank (not ibd). I reached the final stages (interview with MD) the interview was very relaxed and laid back. It has been one day and I know that is quick but when do you think I will be hearing back? 

I am just conscious because so far they have been very swift with the process and tbh I feel like they would have reached out to me by now.