Business US stocks today: S&P 500 and Nasdaq hit record closing highs as US and Iran agree to extend ceasefire by Marcus Liu - Business Editor May 28, 2026 by Marcus Liu - Business Editor May 28, 2026 S&P 500 and Nasdaq Hit Record Highs Amid Geopolitical Developments and Mixed Economic Data The U.S. Stock market closed at record highs on Thursday, with the S&P 500 and Nasdaq … 0 FacebookTwitterPinterestEmail