U.S. stocks opened lower at the open Monday.
Oil prices spiked and Iran rumors added to the unease worldwide.
The S&P 500 slid quickly as investors watched.
Tech stocks dragged the index down due to valuation concerns.
The Dow posted a slight uptick but most shares were flat to lower through the session.
Traders think earnings will indicate whether big tech and consumer stocks can recover in the coming days once volatility eases.