Shortly after the opening, the Dow Jones Industrial Average rose 2.9 percent, the broad S&P 500 rose 2.5 percent and the technology-heavy Nasdaq Composite rose 3.3 percent.
Shortly after midnight, it became clear that Washington and Tehran had agreed, through mediators, to a two-week ceasefire that also includes the opening of the Strait of Hormuz, allowing oil shipments from the Persian Gulf to resume.
