U.S. stocks opened lower in early trade Monday.
Oil prices rose sharply and Iran rumors added to the unease worldwide.
The S&P 500 lost ground fast amid volatility.
Tech stocks pulled the market lower due to valuation concerns.
The Dow managed a small gain but most shares were flat to lower through the session.
Traders think earnings will show if big tech and consumer stocks can recover in the coming days once volatility eases.