On Wednesday, the U.S. stock market opened with a moderate pump trend, with major indexes rising slightly. The Dow Jones Industrial Average increased by 0.02%, the S&P 500 rose by 0.13%, while the Nasdaq Composite climbed by 0.27%, indicating investors' ongoing follow of technology stocks.

Apple Inc.'s stock price has slightly retreated, down 0.14%. Investors are closely following the Apple Fall Product Launch event scheduled to take place in the early hours of today, where the next generation of iPhones and other products are expected to be unveiled. This event may have a significant impact on Apple's stock price and will also bring new points of interest to the entire tech industry.

Meanwhile, the market staged a dramatic scene. The stock price of 36Kr plummeted more than 28% at the opening today after experiencing a crazy pump in the previous trading day. The day before, the stock had triggered the circuit breaker mechanism multiple times, ultimately closing with a rise of over 90%. This extreme price fluctuation highlights the high-risk characteristics of small-cap stocks and reflects the rapid shift in market sentiment.

Overall, today's US stock market shows a differentiated trend between different sectors and companies of various sizes. Large tech stocks remain relatively stable, while certain small-cap stocks have experienced significant rises and falls. Investors need to closely monitor individual stock dynamics while also being wary of potential excessive speculative behavior in the market.