Russia will reduce the share of U.S. treasuries in its forex reserves, the world's third-largest, a senior central bank official said on Wednesday, driving the dollar broadly lower. Russia holds about 30 percent of the reserves, worth $404.2 billion, in treasuries. Central bank First Deputy Chairman Alexei Ulyukayev said it would buy bonds issued by the International Monetary Fund and also up the share of reserves held in bank deposits. >>