Wall Street jumps after China data

NEW YORK (Reuters) - Stocks gained in early trading on Tuesday as Chinese data fueled the belief the government may move to stimulate growth, overshadowing recent credit downgrades in Europe and a mixed bag of big bank earnings. China's economy grew slightly more than expected but at the weakest pace in 2-1/2 years, suggesting officials may try to boost growth in the near term by tweaking monetary policy. "Expectations are always a little irrational when it comes to China because of the track record we've seen. ...