U.S. markets ended mixed on Monday, with the S&P 500 and Nasdaq Composite hitting new intraday and closing highs, rising 0.12% and 0.20%, respectively, while the Dow Jones Industrial Average fell 62.92 points, or 0.13%, as gains were capped by delayed US-Iran peace talks, with no meetings currently planned, though some optimism emerged around the potential reopening of the Strait of Hormuz if tensions eased.