US Regulators fine all banks in the US that they catch flagrantly breaking the law. They don&#x27;t just fine European banks - have a look at how much they have fined the likes of JPMorgan or BoA over the last few years.<p>Likewise, regulators in Europe dish out fines a-plenty. The FSA certainly did over the LIBOR scandal recently.<p>European banks could mitigate risk in the US by trading legally or by ceasing trading there at all. If they really think they can&#x27;t trade legally then their business is not welcome.