GOLDEN MOVE: The price of gold hit a nine-month high after the head of Europe's central bank suggested that its bond-buying plan could benefit Spain. The bank also left its key interest rate for countries that use the euro at 0.75 percent to try to promote growth.
DOLLAR'S IMPACT: Most commodities finished higher, in part because of a weaker dollar. Since commodities are priced in dollars, a weaker dollar makes them more of a bargain for traders who use other currencies.
WHAT'S NEXT: The U.S. government will release its September jobs report Friday.