The dollar index rose 0.17 percent from 78.53 to 78.64.
In late afternoon trading, gold prices on the Comex division of the New York Mercantile Exchange added $13.40 to $1,365.70. Crude oil prices for January delivery lost 34 cents to $81.64 per barrel.
While the index rose slightly, the dollar was mixed across the board. The U.S. standard fell against the Australian dollar and the South Korean won and rose against the British pound and the Russian ruble. It fell against the South African rand and rose against the euro.
The euro fell to $1.3621 from Friday's $1.3685. Against the yen, the dollar fell to 83.31 yen from Friday's 83.48 yen.
The Australia dollar rose to $0.9884 from $0.9857. Against the Hong Kong dollar, the U.S. standard rose to 7.7552 HKD from 7.7541 HKD.
The dollar fell to 1,126 South Korean won from Friday's 1,132.12 won.
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