Its quite competitive citadel makes money. But Citi bought a company and then sold it. KCG went bust ... The big money is trading options, etfs, equities,cme f

Its quite competitive citadel makes money. But Citi bought a company and then sold it. KCG went bust ... The big money is trading options, etfs, equities,cme futures against each other and against swaps. But for swaps you need an otc desk.