A broad U.S. stocks rally sent the Dow industrials to a 13-month high on Monday, after the Group of 20 pledged to keep aid flowing to the world economy, strengthening investors' desire for risk.

The agreement by G20 finance ministers and central bankers over the weekend to keep stimulus in place boosted global stocks on the expectation of prolonged low interest rates.

The U.S. dollar briefly fell to a 15-month low, bolstering commodity prices and materials stocks. Freeport MacMoRan Copper & Gold Inc shares shot up 4.6 percent to $83.20 and the S&P materials sector index gained 3.2 percent.