There's really only two dominant choices here; "boring banking stuff," e.g. a well-diversified hedge fund, or cutting-edge financial engineering that you'll hav

There's really only two dominant choices here; "boring banking stuff," e.g. a well-diversified hedge fund, or cutting-edge financial engineering that you'll have to earn (or hire) a specialized PhD to implement. Anything in between and you're just playing out of your league; your cleverness won't win against the army of brilliant quants that have devoted their lives to this sort of junk.