Industry: AI Chip Demand Stalls, Leading Stocks Drop - AMT, VSH, LRCX, MNI, WDC

[Para 1: The Lead] U.S. semiconductor stocks, including AMAT, VSH, LRCX, MNI, and WDC, experienced significant declines as uncertainty over AI chip sales to China persisted. The U.S. government extended its review of export licenses for AI hardware, impacting major exporters and prompting Chinese customers to delay orders. This geopolitical tension has disrupted the global semiconductor supply chain. [Para 2-3: Supporting details & Context] The U.S. government's extension of the review process for AI chip export licenses, citing national security concerns, has created market uncertainty. This delay has notably affected Amtech Systems (AMAT), Vishay Intertechnology (VSH), Lam Research (LRCX), Micron Technology (MNI), and Western Digital (WDC). The stocks of these companies, which were already volatile, saw significant price drops due to the uncertainty surrounding AI chip sales to China. Amtech Systems, known for its AI-driven technology platform, AmtechOS, saw its stock drop due to the extended review process. Despite earlier positive news about the company's technology upgrades, which had already boosted the stock by 14.5% in a single day, the current market reaction reflects the immediate impact of geopolitical tensions. As of [News Publication Time], Amtech Systems is trading at $15.74 per share, down 13.9% from its 52-week high of $18.28. This indicates that the market is considering the news as meaningful but not a fundamental change in the company's business outlook.