AlQa'dah 3, 1433, Sep 19, 2012, SPA - U.S. stocks closed flat Tuesday, as signs continued to point to a global economic slowdown and new issues arose related to Europe's debt crisis. The U.S. dollar strengthened against the euro and the pound, but weakened versus the yen. Light sweet crude oil for October delivery fell $1.33 to $95.29 a barrel on the New York Mercantile Exchange. Gold futures gained 60 cents to $1,771.20. The Dow Jones industrial average moved up 11.54, or 0.09 percent, to 13,564.64. The broader Standard & Poor's 500 index fell 1.87, or 0.13 percent, to 1,459.32. The technology-heavy Nasdaq composite index lost 0.87, or 0.03 percent, to 3,177.80.