Why S&P 500 rising to 6,000 is ‘hardly a stretch’ as stocks clinch new record. Doubts linger about a sustained stock market rally after China’s big stimulus boost.

Stock markets and oil prices rallied Tuesday after China's central bank unveiled fresh stimulus measures to kickstart growth in the world's number two economy.

Check back for updates throughout the trading day U.S. equity futures bumped higher again Tuesday, with Treasury yields adding to recent gains and the dollar holding steady, as investors react to a surprise China stimulus package and a series of dovish signals on interest rates from Federal Reserve