Equity Capital Markets- Morgan Stanley

Read the WSJ. Specifically, you want to be well informed about what current equity market growth drivers are in your particular group (US, LatAm, EU, etc). You also want to have a few things to say about what current economic policy is geared toward and why it's being used, as well as what all that could mean for the business. They will definitely also want you to give them a rough forecast for the market, kind of like a markets version of a stock pitch, including "what things have been like, where things are now, where I think things are going and here are my supporting facts, etc."

What they want is for you to connect markets, market sentiment, economic policy, etc. in a way that shows you're aware of how each market affects the others. Some classes in economics are really useful for this (specifically things like money and banking, a generic capital markets course, etc) as well as a very solid understanding of equities (if you ever saw the CFA L1 curriculum, then the Equity book is perfect for this).

Depending on what group/region you cover, the job could be pretty different from other people in ECM. Overall though it's a great gig, and the only problem you might encounter (depending on what bank you're talking to) is a lack of career progression options going forward. Not all banks are like this though - some are restructuring or expanding their operations and have plenty of room, so your mileage may vary.