Shares of Soitec, a semiconductor parts manufacturer, fell by 29% following a revision of its full-year outlook due to a deteriorating automotive industry. The company reported a significant revenue miss for the third quarter of 2025, prompting concerns about its future performance amid a weak chip market. Analysts noted that the guidance cut reflects ongoing challenges in the automotive sector, which has been facing sluggish demand. The stock's decline is indicative of broader issues affecting the semiconductor industry as it grapples with changing market dynamics.