United States prosecutors are investigating State Street Corp’s foreign exchange trades, the bank admitted Monday. In addition, the New York state attorney general has also made inquiries into the foreign exchange issues. The issue is the prices that custody banks have charged on so called non-negotiated trades, typically forex transactions less than one million dollars. Pension funds and U.S. authorities have accused some banks of misrepresenting the pricing on those trades. California’s attorney general accused State Street of making false claims on its forex trading.