U.S. markets leaned toward modest gains before the opening bell Tuesday and oil prices fell following the U.S. and Iran's announcement a day earlier that they had a reached a tentative deal to end their conflict.
Futures for the S&P 500 and Dow Jones Industrial Average each edged 0.1% higher. Nasdaq futures were up 0.3%.
Brent crude fell nearly 3% on expectations that the U.S.-Iran agreement might reopen the Strait of Hormuz, where much of Asia gets its oil supply. But some analysts have urged caution, noting many issues remain uncertain.
