On September 19, 2025, the three principal U.S. stock indices—the Dow Jones Industrial Average, the Nasdaq Composite, and the S&P 500—all concluded the trading day with gains, setting new all-time closing highs. Specifically, the Dow Jones Industrial Average climbed by 0.27%, the Nasdaq Composite rose 0.94%, and the S&P 500 index saw a 0.48% increase. The semiconductor sector shone brightly, with Intel's stock price skyrocketing by over 22%. Applied Materials and ASML also witnessed substantial growth, with their shares jumping more than 6% each. Micron Technology wasn't far behind, with its stock price appreciating over 5%. In another notable development, cybersecurity firm NetSkope experienced a stellar debut on the U.S. stock market, closing 18% higher on its first day of trading as part of an initial public offering (IPO). Conversely, the majority of well-known Chinese concept stocks experienced a downturn, with the Nasdaq Golden Dragon China Index plummeting 1.79%. Among the notable decliners, NetEase's stock price fell more than 4%, Bilibili's shares dropped over 3%, and both Li Auto and Alibaba saw their stock prices decline more than 2%.