--- title: "U.S. stock night market volatility: Sandisk fell 3.39% in night trading, pressured by soaring bond yields and fund sell-offs" type: "News" locale: "en" url: "https://longbridge.com/en/news/296281118.md" description: "Sandisk fell 3.39% in after-hours trading; Western Digital fell 2.05% in after-hours trading, with a transaction volume of USD 724,500; Dell Technologies-C fell 2.14% in after-hours trading, with a transaction volume of USD 672,800; Apple rose 0.05% in after-hours trading, with a transaction volume of USD 651,800" datetime: "2026-08-19T00:13:01.000Z" locales: - [zh-CN](https://longbridge.com/zh-CN/news/296281118.md) - [en](https://longbridge.com/en/news/296281118.md) - [zh-HK](https://longbridge.com/zh-HK/news/296281118.md) generator: "portal-rs" --- # U.S. stock night market volatility: Sandisk fell 3.39% in night trading, pressured by soaring bond yields and fund sell-offs **U.S. Stock Night Market Movements** Sandisk fell 3.39% in the night market. Based on recent key news: 1. On August 17, Sandisk's stock price dropped due to a significant decline in the net value of the SA fund managed by Jane Street Capital. The margin safety cushion of the SA fund was breached, forcing Jane Street Capital to sell positions to resolve a margin call crisis, dragging Sandisk's stock price down by 46.57%. Source: Zhitong Finance 2. On August 18, the Sandisk Investor Day event released positive signals, driving the stock price up. Bank of America analysts pointed out that Sandisk's long-term growth targets and high gross margin outlook provide a valuation reference framework for storage stocks. Source: Jinshi Data 3. On August 19, rising bond yields led to a general decline in memory chip stocks. Micron and Sandisk's stock prices fell by 7% and 9%, respectively, as the market worried that rising financing costs would impact AI infrastructure spending. Source: Barron's Weekly, strong demand in the storage industry, tight supply. **Stocks with High Trading Volume in the Industry** Western Digital fell 2.05% in the night market. Based on recent key news: 1. On August 17, analysts downgraded Western Digital's rating due to its gross margin guidance being lower than that of competitor Seagate, raising market concerns about the normalization of average selling prices. This news put pressure on the stock price and weakened investor confidence. 2. On August 18, support from President Trump boosted Western Digital's stock, but the market remains cautious about its long-term impact. 3. On August 19, Western Digital chose stock buybacks instead of expanding new factories, making it difficult to increase supply in the short term, prolonging the market's supply-demand tension. This strategy is seen as a measure to reduce investment risk against the backdrop of growing demand. The storage industry is driven by AI demand, leading to increased volatility. Dell Technologies-C fell 2.14% in the night market. Based on recent key news: 1. On August 17, Melius Research raised Dell Technologies' target price to $650, expecting AI server demand to grow significantly in September. This reflects the market's optimistic expectations for Dell in the AI field, although the stock price fell, the long-term outlook remains positive. 2. On August 17, Lenovo's performance exceeded expectations, boosting Dell's stock price. As major suppliers of AI servers globally, the market has given positive evaluations of Lenovo and Dell's roles in the AI wave. 3. On August 18, significant internal capital outflow was noted at Dell, with SEC disclosures showing over $1.45 billion in internal stock sales, indicating executives' cautious attitude towards the current stock price. AI server demand is growing, and market capital inflow is significant. Apple rose 0.05% in the night market. Based on recent key news: 1. On August 19, Apple announced adjustments to its App Store fee policy to comply with the EU's Digital Markets Act. This move aims to resolve commercial terms disputes with the European Commission and is expected to take effect on October 1. This policy adjustment may impact Apple's service revenue 2. On August 18, Apple acknowledged that new regulatory rules are putting pressure on its services business, particularly the commission income from the App Store. Apple's service business revenue and profit margins fell below market expectations, raising concerns about its long-term profitability. 3. On August 17, Rothschild & Co. upgraded Apple's rating to "Buy" and raised the target price to $400, believing that Apple's high-margin services business and AI strategic opportunities constitute its fundamental moat. 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