Trading is mixed early Monday and oil prices edged lower on fresh optimism over progress in U.S.-Iran negotiations.
Futures for the S&P 500 inched back 0.1% before the opening bell, while futures for the Dow Jones Industrial Average were unchanged. Nasdaq futures ticked up 0.1%.
Oil prices fell as talks progressed over an end to the Iran war. Brent crude, the international standard, traded down $1.55, or 2%, to $79.02 per barrel. It was at roughly $70 a barrel before the start of the war in late February.