click image to view full size
Regulators are looking into whether currency traders have conspired through instant messages to manipulate foreign exchange rates.
The currency rates are used to calculate the value of stock and bond indexes.
Banks have been accused of manipulating energy markets in California and other states.
Since early 2008 banks have been caught up in investigations and litigation over alleged manipulations of Libor.
Banks have been accused of improper foreclosure practices, selling bonds backed by shoddy mortgages, and misleading investors about the quality of the loans.
Source: BusinessWeek