--- title: "U.S. stock night market volatility: Taiwan Semiconductor fell 3.60% in night trading, pressured by the Kumamoto earthquake and AI concerns" type: "News" locale: "en" url: "https://longbridge.com/en/news/294153168.md" description: "Taiwan Semiconductor fell 3.60% in after-hours trading; Micron Technology fell 5.94% in after-hours trading, with a transaction volume of USD 1.272 billion; SK Hynix fell 9.88% in after-hours trading, with a transaction volume of USD 525 million; Intel fell 4.11% in after-hours trading, with a transaction volume of USD 133 million" datetime: "2026-07-29T04:52:03.000Z" locales: - [zh-CN](https://longbridge.com/zh-CN/news/294153168.md) - [en](https://longbridge.com/en/news/294153168.md) - [zh-HK](https://longbridge.com/zh-HK/news/294153168.md) --- # U.S. stock night market volatility: Taiwan Semiconductor fell 3.60% in night trading, pressured by the Kumamoto earthquake and AI concerns **U.S. Stock Night Market Movements** Taiwan Semiconductor fell 3.60% in the night market. Based on recent key news: 1. On July 28, a strong earthquake occurred in Kumamoto, Japan, leading to the evacuation of personnel at Taiwan Semiconductor's JASM plant and the suspension of some construction. The earthquake affected production operations, causing the stock price to drop. Source: Zhitong Finance 2. On July 28, market concerns about AI investment returns and supply chain competition increased, leading to a circuit breaker in the South Korean stock market and a significant drop in the Taiwanese stock market. Taiwan Semiconductor's stock price was dragged down. Source: Wall Street Insight 3. On July 27, the Philadelphia Semiconductor Index in the U.S. fell 4.2%, and Taiwan Semiconductor's stock price briefly dropped below the 43,000-point mark during trading. Source: Jinshi Data. The Taiwanese stock market is volatile, and capital flows are significant, requiring cautious operations. **Stocks with High Trading Volume in the Industry** Micron Technology fell 5.94% in the night market. Based on recent key news: 1. On July 29, breakthroughs in Chinese chip technology led to a significant drop in Micron Technology's stock price, with a monthly decline of 30%, approaching the largest single-month drop in 11 years. This news raised market concerns about Micron Technology's future competitiveness, putting pressure on the stock price. 2. On July 28, Changxin Technology was listed on the Shanghai Stock Exchange, with its stock price soaring 466% on the first day, quickly raising its market value to about $484 billion. This move intensified market concerns about increased competition in the DRAM industry, leading to a collective decline in storage chip stocks like Micron Technology. 3. On July 28, concerns about AI infrastructure investment intensified, leading to a significant sell-off in the global storage chip sector. Companies like SK Hynix and SanDisk saw their stock prices decline simultaneously, dragging down Micron Technology's stock performance. Competition in the storage chip industry is intensifying, and market volatility is evident. SK Hynix fell 9.88% in the night market. Based on recent key news: 1. On July 28, SK Hynix's stock price fell to a new low since its listing, as investors exited the overvalued semiconductor sector, causing the stock price to drop below the issue price. The semiconductor sector as a whole is under pressure, significantly dragging down SK Hynix's stock price. Source: Jinshi Data 2. On July 29, SK Hynix announced its financial report, showing a year-on-year increase in operating profit of 557%, but below market expectations, leading to a nearly 12% drop in stock price. Investor concerns about the sustainability of the AI boom intensified, affecting the stock price. Source: Jinshi Data 3. On July 29, an unusual clearing event for SK Hynix contracts caused stock price fluctuations, and Trade.xyz announced compensation for clearing losses, raising concerns about market integrity. Source: Trade.xyz announcement. The semiconductor sector is under pressure, with significant capital outflows. Intel fell 4.11% in the night market. Based on recent key news: 1. On July 27, Intel signed a memorandum of cooperation with Lens Technology, focusing on TGV advanced packaging technology. This memorandum is valid for one year and can be negotiated for extension before expiration. This news had a positive impact on Intel's stock price but could not offset the overall market downward pressure 2. On July 27, Intel's second-quarter performance exceeded expectations, with revenue increasing by 25% year-on-year to $16.1 billion, marking the fastest revenue growth rate since 2011. Despite the strong performance, concerns about future profitability remain, leading to stock price fluctuations. 3. On July 27, Changxin Technology was listed on the STAR Market, soaring 471.59% at the opening, with a market capitalization exceeding that of Intel. This event raised market concerns about intensified competition in the semiconductor industry, further impacting Intel's stock price. 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