U.S. stocks started lower in early trade Monday.
Oil prices rose sharply and Iran rumors added to the jitters worldwide.
The S&P 500 slid quickly while traders reacted.
Tech stocks pulled the market lower due to valuation concerns.
The Dow notched a modest rise but most shares were flat to lower through the session.
Traders think earnings will show if big tech and consumer stocks can bounce back later this week as market sentiment improves.