The major banks’ recent effort, led by Citigroup, to convince the US Congress to repeal a key provision of the 2010 Dodd-Frank Wall Street Reform and Consumer Protection Act that would have pushed much of their short-term trading to distant affiliates (which are not too big to fail) reinforces this interpretation. The banks know that they will receive more business if they run their trading desks from the part of their corporate group that has the strongest government backing.