Best Trading Firms?

FX
1. RBS
2.
3.

Commodities
1. Glencore
2. GS
3. PhiBro

Equities
1. Citadel
2. RenTech
3. SAC

Options
1.
2.
3. DRW

Some of these I filled in arbitrarily, commodities in particular. I'd love to hear other thoughts on this.

 

Oh, almost forgot...
FI
1. BarCap
2.
3. CS

 

Perhaps this report by Citi will help give you a better idea in FI.

http://www.zerohedge.com/sites/default/files/images/user5/imageroot/volcker/FICC Citi 3.jpg