U.S. stocks closed lower Tuesday as the Dow Jones Industrial Average fell 0.8% to 52,766.88, moving below its 50-day moving average for the first time since April 10 and reaching its lowest close since July 31. The S&P 500 declined 0.7% to 7,631.47 and the Nasdaq Composite lost 1% to 26,099.77, remaining 0.8% and 0.6% above their respective 50-day averages. The VIX rose 9.52%, while AI-linked shares sold off broadly, including Cadence Design Systems, CrowdStrike, Dell Technologies, Astera Labs and Synopsys. Elevated oil prices, persistent inflation and rising Treasury yields weighed on sentiment, with Brent crude up 2.3% to $92.61 a barrel as conflict between the United States and Iran disrupted shipping through the Strait of Hormuz. Despite the short-term weakness, the Dow gained more than 1% in August for a fifth straight monthly advance, while the S&P 500 and Nasdaq rose 2.6% and 3.9%.