COPPER FALLS: Copper for December delivery fell 12.95 cents, or 3.6 percent, Tuesday to settle at $3.5025 a pound.
GREEK WORRIES: Copper fell after Greece's prime minister announced that he would put an unpopular European financial rescue package for his country to a popular vote. If the vote fails, it might lead the country into a messy default and threaten Europe's plan for staving off a financial crisis. Copper prices jumped last week on hopes a European bailout would stoke demand.
OIL DOWN: Benchmark oil lost $1, or 2 percent, to end at $92.19 per barrel.