--- title: "U.S. stock night trading volatility: Sandisk fell 3.12% in night trading, geopolitical easing fails to alleviate semiconductor supply chain pressure" type: "News" locale: "en" url: "https://longbridge.com/en/news/286841876.md" description: "Sandisk fell 3.12% in after-hours trading; Western Digital fell 2.32% in after-hours trading, with a transaction volume of USD 2.44 million; IonQ fell 1.91% in after-hours trading, with a transaction volume of USD 2.36 million; Apple fell 0.37% in after-hours trading, with a transaction volume of USD 2.02 million" datetime: "2026-05-19T02:06:48.000Z" locales: - [zh-CN](https://longbridge.com/zh-CN/news/286841876.md) - [en](https://longbridge.com/en/news/286841876.md) - [zh-HK](https://longbridge.com/zh-HK/news/286841876.md) --- # U.S. stock night trading volatility: Sandisk fell 3.12% in night trading, geopolitical easing fails to alleviate semiconductor supply chain pressure **U.S. Stock Night Market Movements** Sandisk fell 3.12% in the night market. Based on recent key news: 1. On May 19, Trump announced a delay in attacks on Iran, leading to declines in technology stocks like Sandisk. This move eased market concerns about geopolitical risks, but tech stocks still faced selling pressure, with Sandisk's stock price dropping about 5%; 2. On May 18, the Samsung Electronics union planned an 18-day strike, which could impact the semiconductor supply chain. The strike will put pressure on global chip supply, causing stock prices of related companies like Sandisk to be under pressure; 3. On May 16, Goldman Sachs warned that the market is overly optimistic about economic growth, pointing out risks of shortages in the semiconductor and energy supply chains. The uncertainty regarding the future economy has intensified, affecting investor confidence. The semiconductor industry faces supply chain pressures that need attention. **Stocks with High Trading Volume in the Industry** Western Digital fell 2.32% in the night market. Based on recent key news: 1. On May 18, Western Digital announced the launch of its first post-quantum encrypted hard drive, aimed at enhancing AI data security. This technological advancement may boost market confidence in its products, but it did not immediately drive stock prices up. 2. On May 18, analyst reports indicated that although Western Digital received a "Moderate Buy" rating, it was not listed as a top recommended stock. This may lead to insufficient investor confidence in its future performance, affecting stock prices. 3. On May 16, the market's recognition of high-capacity storage as a core layer of AI infrastructure has increased; however, investors are still assessing its long-term economic benefits, leading to stock price fluctuations. The trends in AI and cloud are driving growth in storage demand. IonQ fell 1.91% in the night market. Based on recent key news: 1. On May 18, IonQ announced that its quantum system will shift to electronically controlled ion traps, expecting to double its revenue this year. This move will drive its technological milestones and enhance its market competitiveness. Source: Zhitong Finance 2. On May 17, IonQ's market capitalization reached $1.94 billion, far exceeding its one-year average of $1.52 billion. The market's valuation of the company is highly volatile, and investors need to be cautious. Source: Wall Street Insight 3. On May 16, IonQ is acquiring SkyWater Technology for vertical integration. This will accelerate its prototype chip testing and help scale up during commercialization. Source: Jinshi Data Quantum Computing Sector is in its early stages, suitable for long-term layout. Apple fell 0.37% in the night market. Based on recent key news: 1. On May 18, Apple was required by an Indian court to fully cooperate with an antitrust investigation, leading to increased market concerns about its legal risks. This event may affect Apple's business expansion in the Indian market, putting pressure on its stock price. 2. On May 18, Apple announced a price reduction for the iPhone 17 series in the Chinese market, stimulating sales and enhancing market competitiveness. This move attracted significant consumer attention ahead of the 618 shopping festival, driving stock prices up On May 19th, Apple emphasized the privacy protection of its AI solutions at WWDC, increasing market expectations for its AI strategy, and the stock price remained relatively stable. 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