“A global investigation into the setting of the London interbank lending rate, and related global benchmarks, has so far yielded about $3.6 billion in fines. Penalties for some of the biggest players are still to come. Traders have also faced criminal charges. As the extent of damage caused by Libor-rigging is revealed, lawyers say the probe into fixing currency rates could unfold in a similar way, and rival its impact. London is the center of the loosely regulated foreign exchange market, the biggest in the world’s financial system with average daily turnover of $5.3 trillion. Proven abuse in this market would have a significant ripple effect, exposing offending firms to a host of legal action.”
http://money.cnn.com/2013/11/20/investing/forex-probe-lawyers/index.html