The Financial Stability Board said Friday it will investigate the integrity of benchmark rates in the foreign exchange market, amid a global probe into potential collusion by banks to manipulate currencies benchmarks at the expense of their customers.

The FSB, which coordinates the global regulatory reaction to the 2008 financial crisis on behalf of the Group of 20 leading industrialised and emerging nations, said it "has decided to incorporate an assessment of FX benchmarks into its continuing program of financial benchmark analysis."