The U.K. government plans to criminalize the manipulation of seven more benchmarks in markets from foreign exchange to gold and oil as it tries to revive confidence in the integrity of London as a financial center. The Treasury today started a review into whether it should extend legislation regulating the London Interbank Offered Rate to cover other key rates including the WM/Reuters 4 p.m. London currency fix, the Sterling Overnight Index Average, the London gold fixing and the ISDAFix, according to a statement . The government aims to have the rules in place by the year-end — five months before the next general election. The U.K. is stiffening the penalties for manipulation after benchmarks set in London were tainted by scandal. At least 10 firms have been fined almost $6.5 billion for rigging Libor and related gauges, and regulators are probing whether traders rigged key foreign-exchange rates used by […]