By Pete Sweeney SHANGHAI (Reuters) - Companies gambling on yuan appreciation are distorting Chinese trade statistics, creating a monetary policy headache for Beijing officials and complicating government plans to liberalize the capital account. Speculative inflows disguised as trade are causing concern because they aggravate a recent trend - the sudden resurgence of hot money inflows. Some $125 billion poured into China in January and February after nine consecutive months of outflows, exclusive of hot money masquerading as trade. ...