Since the mid-2009，the U.S. retail and manufacturing sectors show signs of recovery，automobile and housing sector stop falling，investors risk appetite is improving，systemic financial risks subdues，the overall economic activities have been stabilized，the U.S. economy go through sharp contraction in the past year，now begin to rebound. However，U.S. economy still confronts with risks in 2010，and economic growth will be relatively slow：high unemployment，household wealth shrinking，household deleveraging and the credit crunch，make consumer spending grow slowly；small banks and commercial real estate market is still fragile，credit conditions remain tight；stock market is difficult to restore to the previous scale，and are subject to more strict regulation，its support to economic growth decline；a large number of vacant rooms suppress housing investment to rebound cyclically；inflation expectations face upside risks，the time to increases interest rate may be earlier than that people expected；high deficit will squeeze the space of fiscal expansion. The annual growth rate of U.S. economy is estimated to be around 2.5%. <<