A Chinese flag flies outside the New York Stock Exchange, November 20, 2009. Shares of Chinese discount hotel chain 7 Days Group Holdings Ltd  jumped as much as 28.6 percent in their New York Stock Exchange debut on Friday. REUTERS/Brendan McDermid (UNITED STATES BUSINESS)Reuters - U.S. stocks could sputter next week as volumes dry up in holiday-shortened trading and with a slew of economic reports likely to illustrate the recovery is still fragile.