On August 18, 2026, the three principal U.S. stock indices concluded the trading session with a collective decline. The Dow Jones Industrial Average dipped by 0.51%, the S&P 500 Index witnessed a 0.52% drop, and the Nasdaq Composite Index experienced a 0.32% decrease. Amidst the broader market downturn, the AI memory and optical communication sectors bucked the trend, posting notable gains. Memory chain enterprises, including SanDisk and Micron Technology, saw significant surges. Meanwhile, Hesai Technology unveiled its financial results for the second quarter, reporting a net revenue of 860.8 million yuan, marking a 21.9% year-on-year increase, and a net profit of 70.6 million yuan, up by 60% year-on-year. Nevertheless, its pre-market stock decline in the U.S. market temporarily widened to 12%.