In the financial services field, you should have strong personal motivation to succeed in your work, and your interviewer is asking this question to see what makes you tick in your career. Give one or two specific examples that emphasize your motivation in your day-to-day work. You might include an anecdote that explains why you got into this field in the first place. Perhaps a previous manager has even commented on your motivation. Feel free to include this in an answer.

While money may be a motivator, don't focus on this aspect in your answer. Rather, focus your answer on intrinsic motivation mostly removed from external factors like money, status, or external validation. In the end, your interviewer is looking to get a sense of how you will stay hungry for more if you are hired for this role.