On September 29, ARM Holdings rose 3.05% in regular trading, trading at approximately $290.65 per share, with turnover of $245 million. The stock rebounded alongside the broader semiconductor sector following the previous session's steep decline.

On the news front, the prior trading day saw OpenAI announce a pause on training and testing of its most advanced AI model, sparking fears over the outlook for AI infrastructure spending. The announcement triggered a broad-based selloff in chip stocks, with the Philadelphia Semiconductor Index falling 3% and ARM plunging over 8% in a single session to close near $284.30. The sharp rebound on September 29 reflects a technical recovery as Wall Street analysts broadly maintained that the fundamental growth drivers behind AI infrastructure buildout remain intact.

Within the Semiconductors sector, the overall tone was constructive. Among major peers, Broadcom rose 2.85%, NVIDIA gained 0.56%, Micron Technology added 0.56%, Advanced Micro Devices edged up 0.35%, while Intel slipped 1.17%.

ARM Holdings is a global leader in semiconductor IP, licensing CPU, GPU, and system IP designs used across automotive, computing infrastructure, consumer tech, and IoT markets. In March, the company announced an expansion of its compute platform to include Arm AGI CPU-based silicon products.

(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.)