--- title: "U.S. stock night market volatility: IonQ fell 3.04% in after-hours trading, with high valuation and acquisition risks raising market concerns" type: "News" locale: "en" url: "https://longbridge.com/en/news/286699418.md" description: "IonQ fell 3.04% in after-hours trading; SanDisk fell 1.80% in after-hours trading, with a transaction volume of $140 million; Apple fell 0.34% in after-hours trading, with a transaction volume of $16 million; Seagate Technology fell 0.76% in after-hours trading, with a transaction volume of $7.2 million" datetime: "2026-05-18T02:01:50.000Z" locales: - [zh-CN](https://longbridge.com/zh-CN/news/286699418.md) - [en](https://longbridge.com/en/news/286699418.md) - [zh-HK](https://longbridge.com/zh-HK/news/286699418.md) --- # U.S. stock night market volatility: IonQ fell 3.04% in after-hours trading, with high valuation and acquisition risks raising market concerns **U.S. Stock Night Market Movements** IonQ fell 3.04% in the night market. Based on recent key news: 1. On May 17, IonQ's stock price fluctuated significantly, with its market value exceeding the one-year average level. Concerns about its high valuation led to a decline in stock price. Source: Zhitong Finance 2. On May 16, IonQ is acquiring SkyWater Technology for vertical integration. This move has drawn market attention to its future growth potential but also increased investment risks. Source: Wall Street Insight 3. On May 15, analysts rated IonQ as a moderate buy but believed that five other stocks were more attractive. This rating affected investor confidence, leading to a decline in stock price. Source: Jinshi Data Quantum computing industry is highly volatile, requiring cautious investment. **Stocks with High Trading Volume in the Industry** SanDisk fell 1.80% in the night market. Based on recent key news: 1. On May 15, SanDisk released its Q3 fiscal year 2026 financial report, showing impressive performance. The company's quarterly revenue was $5.95 billion, a 97% increase quarter-over-quarter and a 251% increase year-over-year. Revenue from the data center business surged 645% year-over-year, becoming the core engine of growth. The company has a more positive outlook for the next fiscal quarter, expecting revenue between $7.75 billion and $8.25 billion, with adjusted earnings per share of $30 to $33, maintaining strong growth momentum. Source: Southern Finance 2. On May 15, SanDisk advised shareholders to reject the "mini-tender" offer proposed by Tutanota LLC. The offer aims to acquire up to 100,000 shares of SanDisk common stock at a price of $1,150 per share. SanDisk emphasized that it neither endorses nor supports the offer and strongly urged investors not to take any action. Source: Zhitong Finance 3. On May 16, Samsung Electronics faced an 18-day general strike, with the union insisting on negotiations with management after the strike, which could significantly impact the semiconductor supply chain. Source: Southern Finance The storage industry is experiencing explosive growth, with AI technology being fully implemented. Apple fell 0.34% in the night market. Based on recent key news: 1. On May 15, a rift emerged in Apple's partnership with OpenAI, with OpenAI preparing to take legal action, causing Apple's stock price to drop by 1.2% at one point. 2. On May 15, Apple announced a 618 promotional event, reducing the price of the iPhone 17 series by 1,000 yuan, combined with a trade-in subsidy, bringing the lowest price down to 6,999 yuan. 3. On May 15, some Apple users temporarily could not use Apple Cash, and the company is working to resolve the issue. Competition in the smartphone market is intensifying, and the prices of storage chips are rising. Seagate Technology fell 0.76% in the night market. Based on recent key news: 1. On May 13, Seagate Technology's Executive Vice President Ban Seng Teh sold 15,560 shares of the company, with a transaction amount of $12,687,979 This move may raise concerns in the market about the confidence of company insiders, leading to a decline in stock prices. Source: MT Newswires 2. On May 15, analysts rated Seagate Technology as a moderate buy, but five other stocks were considered better investment choices. This may affect investor confidence in Seagate Technology, putting pressure on its stock price. Source: MarketBeat 3. On May 16, the market's perception of high-capacity storage as a core layer of AI infrastructure is changing, with attention on the stock performance of Seagate Technology and Western Digital. Investors may be underestimating the long-term economic benefits of AI data storage, which could have a positive impact on stock prices. Source: 24/7 Wall St. AI storage demand is rising, and the industry outlook is optimistic ### Related Stocks - [IONQ.US](https://longbridge.com/en/quote/IONQ.US.md) - [SNDK.US](https://longbridge.com/en/quote/SNDK.US.md) - [AAPL.US](https://longbridge.com/en/quote/AAPL.US.md) - [STX.US](https://longbridge.com/en/quote/STX.US.md) ## Related News & Research - [IonQ Stock Consolidates After 15% Jump On Raised 2026 Guidance](https://longbridge.com/en/news/286124540.md) - [IONQ Stock Slips Despite New Quantum Lab, but Analysts See 16% Upside](https://longbridge.com/en/news/286380818.md) - [Quantum Stocks Have Been Mostly Hype. IonQ May Be the Real Deal.](https://longbridge.com/en/news/286107235.md) - [Why IonQ (IONQ) Is Down 13.3% After Raising 2026 Revenue Guidance And Backlog To $470 Million](https://longbridge.com/en/news/286893654.md) - [WIM INVESTMENT MANAGEMENT Ltd Invests $3.94 Million in IonQ, Inc. $IONQ](https://longbridge.com/en/news/286408775.md)