Stock Market: Will S&P 500 Open Up Or Down Today?

The S&P 500 surged 1.65% on Monday following President Trump's announcement of a U.S.-Iran peace deal, with oil prices falling nearly 5% and easing geopolitical tensions. Polymarket traders show a 52% probability the index will open higher on Tuesday, though futures trading remained flat overnight as investors await confirmation the agreement will proceed as planned.