Global Semiconductor Selloff Hits Himax, Allegro; Broadcom Guidance, Jobs Data Sour Sentiment

Semiconductor shares tumbled globally on June 5, 2026, as Broadcom's guidance miss reset expectations for AI chip spending and a stronger-than-expected US jobs report extinguished near-term rate cut hopes. The selloff pulled down Himax Technologies, Allegro MicroSystems, and Amtech Systems, among others. South Korea's Kospi index fell 5.5%, led by Samsung's 6.4% drop and a nearly 10% plunge in SK Hynix. In Europe, ASML declined 3.8% and Infineon lost more than 6%. The US economy added 172,000 jobs in May, topping forecasts and causing CME FedWatch to price in a year-end rate hike risk, pressuring richly valued semiconductor stocks. Himax shares, extremely volatile with 40 moves greater than 5% in the past year, reversed gains from earlier in the week when they rose 10.3% on Nvidia's GTC keynote. The stock remains up 147% year-to-date at $21.07 but trades 12.9% below its 52-week high of $24.19.