This was for their private wealth management division: Did two phone interviews on two separate occasions with more recent hires (both at associate level) with similar formats, but clearly different styles based on the personality of the interviewer. First interviewer - Around 50% background questions and 50% brainteaser types. Did reasonably well, but got hung up on the last brainteaser that I had to be guided through. Generally friendly and answered lots of my questions about the position/department. Good enough to get me to the second round... Second interviewer - Starts by asking about some points about my educational background and asks for elaboration. I've been asked about it in many past interviews, so talked through it quite smoothly, but he clearly didn't understand the subject at all (Monte Carlo acceleration techniques). He promptly switches the topic and start throwing math brainteasers at me one after another until I start tripping up a bit and he says "come on, time's ticking", instead of offering any hints to move the process along. Afterwards, he just says the "we'll be in touch" and hangs up. One of the rudest interviewers I've ever spoken with.