U.S. stocks closed mixed Monday, as the Nasdaq briefly topped 4,000 for the first time since September 2000 but failed to close above that key level. The dollar gained ground against the euro, the pound, and the yen. Light sweet crude oil for January delivery dropped 75 cents to $94.09 a barrel on the New York Mercantile Exchange. Gold futures fell $2.90 to $1,241.20 an ounce. The Dow Jones industrial average climbed 7.77, or 0.05 percent, to 16,072.54. The broader Standard & Poor's 500 index lost 2.28, or 0.13 percent, to 1,802.48. The technology-heavy Nasdaq composite index rose 2.92, or 0.07 percent, to 3,994.57.
