U.S. stocks extended their recent losses as the escalating war in the Middle East pushed oil prices higher. The Dow Jones Industrial Average fell 405.41 points, or 0.77%, to 52380.66. The S&P 500 declined 37.16 points, or 0.48%, to 7636.36, while the tech-heavy Nasdaq Composite dropped 168.07 points, or 0.64%, to 26253.34.