This common interview question is an opportunity to demonstrate self-insight. Give an honest answer with a real weakness you have been identified, and what plan you've put into place to work on it. Just make sure the weakness isn't a core competency of the Morningstar job description. If it's an analyst role, revealing 'logical reasoning skills' as a weakness likely won't get you far. Reflect on traits you want to work on, but that won't get in the way of overall job success.

Honesty and self-awareness are key for this question. Interviewers have heard it all and will see through phony attempts to present a trait as a weakness when it's not really a weakness.