REUTERS/Peter NichollsThe US Commodity Futures Trading Commission (CFTC) fined Citibank a combined $425 million (£288.5 million) on Wednesday to settle various rate-fixing allegations between 2007 and 2012. The allegations centre around the manipulation of LIBOR, a measure of rates banks will lend to other banks at, and ISDAFIX, a measure used to set interest rates on swaps. While you might not have heard of these measures, the two benchmarks are used to set the price of products worth millions, if not billions, each day.