U.S. stocks began down in early trade Monday.
Oil prices spiked and Iran rumors added to the jitters in the sector.
The S&P 500 slid quickly as investors watched.
Tech stocks pulled the market lower on the back of earnings worries.
The Dow managed a small gain but most shares stayed flat or lower through midday.
Traders think earnings will indicate whether big tech and consumer stocks can bounce back later this week if buying pressure returns.