Crude oil returned to $100 per barrel Monday, rising 3 percent. Copper rose 2 percent, and silver gained 4 percent. They rebounded from last week's sell-off, when silver's price tumbled 27 percent and oil sank 15 percent.
Stronger metals prices helped push up Freeport-McMoRan Copper & Gold 1.4 percent in pre-market trading. Exxon Mobil rose 0.6 percent.
Ahead of the opening, Dow Jones industrial average futures are up 43 points, or 0.3 percent, to 12,612. S&P 500 futures are up 4.70, or 0.4 percent, to 1,339.30. Nasdaq 100 futures are up 13, or 0.5 percent, to 2,386.50.
European markets, though, are struggling on worries that Greece will need another financial bailout.





