US stock market technology sector volatility

US stock markets have experienced volatility driven by a sustained sell-off in the technology and semiconductor sectors. In mid-August, major indices closed lower as the Nasdaq Composite declined 1.33% and the S&P 500 dropped 0.69%. This movement was characterized by significant volatility in the semiconductor industry, with the Philadelphia Semiconductor Index falling 4.98% amid declines in companies such as Intel, Micron Technology, and SK Hynix ADR. During this period, healthcare, energy, and financial stocks provided some market support. By late August, the impact of the semiconductor slump continued, though market performance became mixed. While the Nasdaq and S&P 500 continued to fall, the Dow Jones Industrial Average rose by 0.26%. The semiconductor sector remained under pressure, with the Philadelphia Semiconductor Index plunging 2.70% and major chipmakers like Nvidia, AMD, and Broadcom seeing losses. This tech-driven downward pressure was partially offset by falling US Treasury yields and gains in the financial and payment sectors. On August 24, the New York stock market continued to show mixed performance. The Dow Jones Industrial Average saw gains, while the Nasdaq and S&P 500 faced downward pressure from a sell-off in semiconductor and AI-related stocks, including Micron Technology, AMD, and Broadcom. Investors reacted to shifting growth expectations and profit-taking in high-valuation tech companies. While a decline in long-term Treasury yields—aided by news that the U.S. Treasury might use its General Account to support debt buybacks—provided some relief, the downward trend in semiconductors offset the positive impact of lower interest rates. By August 31, technology stocks showed significant divergence. Nvidia experienced a sharp decline, with shares dropping 4.57% on high trading volume, and Tesla fell 1.71%. Conversely, other tech giants saw gains, with Amazon rising 3.97%, while Microsoft and Apple increased by 1.68% and 1.63%, respectively.