U.S. stocks closed mixed Monday, after the Dow Jones industrial average hit a new all-time high. The dollar traded 0.98 percent higher against a basket of currencies. Light sweet crude oil for December delivery fell 9 cents to $43.32 per barrel on the New York Mercantile Exchange, while gold futures dropped $4.80 to $1,219.50 per ounce The Dow Jones industrial average added 21, or 0.11 percent, to 18,868.69. The broader Standard & Poor's 500 index lost 7, or 0.33 percent, to 2,157. The technology-heavy Nasdaq composite index declined 30, or 0.58 percent, to 5,207