US shares open lower

Stocks opened lower on Wall Street Monday as traders took profits after last week's surge, opting to wait for new signals on the strength of the economy.

But a jump in crude prices on reports that Saudi Arabia has offered a production cap deal to Iran gave a slight boost to energy shares.

Five minutes into trade, the Dow Jones Industrial Average shed 0.6 percent to 18,152.01.

The broad-based S&P 500 declined 0.5 percent to 2,153.32, while the tech-rich Nasdaq Composite Index dropped 0.6 percent to 5,272.13.