U.S. stock night trading volatility: Coherent Corp. fell nearly 4% in after-hours trading, raising market concerns over high valuations and capital expenditure pressures

U.S. Stock Night Market Movements Coherent Corp. fell 3.96% in the night market. Based on recent key news: On May 14, Coherent Corp. reached an all-time high due to market optimism about its long-term prospects in the AI data center market. Bank of America raised its target price to $400, although it maintained a "neutral" rating. This news initially drove the stock price up, but it later retreated. Source: Barron’s On May 13, the long-term growth potential of Coherent Corp. in the optical chip market was widely discussed, with the market holding an optimistic view on its future profitability. However, short-term pressures from high capital expenditures and R&D costs led to stock price fluctuations. Source: MarketWatch On May 12, strong expectations for AI data center demand drove up Coherent Corp.'s stock price, but analysts warned that valuations had already reflected future earnings, which could pose adjustment risks. Source: Benzinga AI data center market has broad prospects but high volatility risks. Stocks with High Trading Volume in the Industry Corning fell 4.46% in the night market. Based on recent key news: On May 12, Corning was repositioned as an AI infrastructure supplier, with optical communications business revenue surging 36% year-on-year, demonstrating substantial fulfillment of AI infrastructure demand, driving stock price fluctuations. On May 11, Corning executives sold a large amount of stock, raising market concerns about internal confidence in the company, leading to a stock price decline. On May 13, Mizuho raised Corning's target price to $220, maintaining an "outperform" rating, with the market holding an optimistic view on its future performance. The fiber optics industry is highly focused, and risks need to be monitored. Amphenol fell 1.15% in the night market. Based on recent key news: On May 12, Amphenol submitted an 8-K form to the U.S. Securities and Exchange Commission regarding direct or off-balance-sheet financial obligations. Such documents are typically submitted within four days of events that may significantly impact the company's financial condition or stock price, potentially raising market concerns about the company's financial health, leading to a stock price decline. On May 14, Benzinga reported that Amphenol's annualized return over the past decade exceeded the market by 10.83%, with an average annual return of 24.57%. Despite strong long-term performance, the market may take a cautious stance on its future growth potential in the short term, affecting stock price performance. On May 13, Amphenol released original content through the EDGAR system, emphasizing the company's responsibility for information. This transparency may not have alleviated market concerns about its financial obligations, leading to stock price fluctuations. The market holds a cautious view on financial health. Lightwave Logic fell 1.81% in the night market. Based on recent key news: On May 14th, Lightwave Logic released its Q1 financial report, with net losses widening to $6.3 million and revenue increasing by 27% year-on-year. Despite poor financial performance, the company's stock price remains at a high level driven by demand for AI data centers. Source: Benzinga On May 14th, the company announced that silicon photonic foundry capacity is limited, affecting production cycles. Management expects to launch multiple devices in the third to fourth quarter of 2026 and plans to establish a new production line in Denver. Source: Public Technologies On May 14th, R&D investment in the optoelectronic polymer platform increased to $3.5 million, driving improvements in device performance and customer engagement. The company's cash reserves are strong, supporting long-term strategic goals. Source: Benzinga AI demand drives the expansion of the photonic integration market