U.S. stocks began down at the open Monday.
Oil prices rose sharply and Iran rumors added to the concern worldwide.
The S&P 500 lost ground fast amid volatility.
Tech stocks pulled the market lower as earnings lagged.
The Dow managed a small gain but most shares were flat to lower through the session.
Traders think earnings will reveal whether big tech and consumer stocks can rebound before week’s end once volatility eases.