Stocks on Wall Street drifted to a mixed close Monday as oil prices fell after the U.S. and Iran paused their attacks while work resumed on restarting negotiations to end the war. The S&P 500 rose less than 0.1% after spending much of the day bouncing between small gains and losses. Oil prices reversed course from a week ago, when a sharp escalation in fighting between the U.S. and Iran worsened worries about global oil supplies. The price of Brent crude, the international standard, dropped 6.3% to settle at $85.87 a barrel for October delivery. U.S. crude oil for September delivery fell 7.5% to settle at $82.61 a barrel.