U.S. stock futures slip after China disappointment By: MarketWatch March 05, 2009 at 05:49 AM EST U.S. stock futures fail to extend gains Thursday following a rare up day, with disappointment over a lack of new Chinese spending dampening sentiment. Read More >> Related Stocks: Diamonds Trust, Series 1 Exxon Mobil PowerShares QQQ S&P Depository Receipts