US and British regulators fined six major global banks nearly $6 billion Thursday for rigging the foreign exchange market and Libor interest rates.

The far-flung settlement included guilty pleas from Barclays Bank, JPMorgan Chase, Citicorp and the Royal Bank of Scotland for conspiring to manipulate the massive currency market, as well as a guilty plea from Switzerland's UBS, for violating a prior settlement of Libor charges.