On February 26, 2026, the performance of the three major US stock indices was a mixed bag at the close of trading. The Dow Jones Industrial Average eked out a slight gain of 0.03%, while the Nasdaq Composite Index took a hit, dropping by 1.18%, and the S&P 500 also declined, falling 0.54%. The tech sector largely bore the brunt of the downturn, with Nvidia's stock price plummeting more than 5%. This sharp decline resulted in the company shedding approximately RMB 1.77 trillion in market capitalization, marking its largest single-day loss in nearly 11 months. Tesla's shares also took a tumble, falling over 2%, while TSMC and AMD saw their stock prices drop more than 3% each. In contrast, the quantum computing sector stood out as a bright spot, with IonQ's stock price soaring over 18% and D-Wave Quantum's shares rising more than 5%. The majority of Chinese concept stocks also experienced a downturn, as evidenced by the Nasdaq Golden Dragon China Index, which dropped 1.78%. Specifically, Baidu's stock price fell 5.65%, and BYD's shares declined over 2%. However, Pony.ai bucked the trend, with its stock price increasing by 4.7%.