US Treasury officials have sounded out investors and Wall Street traders on branding China a "currency manipulator", the Financial Times reported. Charles Grassley, Republican chairman of the Senate finance committee, said last week he would draw up legislation to deal with the growing array of US-China trade problems. In a speech published in Caijing magazine ahead of a presentation today, Wu Xiaoling, deputy governor of the People's Bank of China said: "Making interest rates and the foreign exchange rate market-oriented has always been a goal that we have pursued."