On September 14, ARM Holdings fell 8.88% in regular trading, trading at 241.51 USD/share, with turnover of $119 million. The stock had already declined over 4% in pre-market trading before losses accelerated after the open.

The selloff was driven by a convergence of bearish catalysts across the semiconductor sector. Over the weekend, OpenAI announced it would not pursue an IPO this year, citing AI safety concerns, while CEOs of Anthropic, OpenAI, and SpaceX collectively called for slowing AI development — sparking fears of a broader deceleration in AI investment. Additionally, U.S. August PPI came in above expectations at 5.4% year-over-year, pushing the probability of a September Fed rate hike to 70% and sending the 30-year Treasury yield to 5.347%, compressing valuations across high-growth technology names.

ARM had previously accumulated gains on news of a Samsung 2nm edge AI chip collaboration and a Piper Sandler overweight initiation with a $291.87 mean target price, making it vulnerable to profit-taking during the sector-wide correction. The Philadelphia Semiconductor Index fell over 2%, with Intel down 7.31%, Micron down 6.72%, AMD down 6.06%, Broadcom down 3.77%, and NVIDIA down 3.86%.

(The above content is based on publicly available market information, generated by a program or algorithm, and is intended solely as a stock movement alert. It does not constitute investment advice or a basis for trading decisions.)