Benchmark S&P 500 rises 1.7 percent, while tech-heavy Nasdaq jumps 3.1 percent.

Stock markets rallied worldwide, and oil prices eased after the United States and Iran reached a tentative deal to get the global flow of crude going again

(Bloomberg) -- Stocks and Treasuries rallied while oil fell to a three-month low after the US and Iran reached a deal to reopen the Strait of Hormuz, easing concerns over…