Arm shares fall 7% as AI selloff hits valuation

Arm Holdings shares dropped 7% in premarket trading Monday after an AI-linked selloff hit technology and semiconductor stocks, sending the Nasdaq lower and applying pressure to high-multiple chip design firms.

Investors pointed to a stretched valuation, a regulatory review by the U.S. Federal Trade Commission of Arm’s licensing practices, and concerns about majority owner SoftBank’s leveraged investments in AI as factors weighing on the stock.

The shares remain well below their peak of $452.70 reached earlier this year. The stock was trading at roughly 110 times forward earnings, a multiple analysts say assumes several years of rapid growth. HSBC downgraded Arm to Hold in July, citing foundry capacity limits for advanced process nodes and valuation risks.

Piper Sandler initiated coverage on Sept. 9 with an Overweight rating, highlighting momentum from server CPU design wins and estimating Arm holds about 50% of its target CPU IP market. The firm projected Arm’s IP revenue could grow at about a 20% compound annual rate to roughly $12 billion by fiscal 2031 and flagged expansion into accelerator intellectual property and a small share of the ASIC market as potential upside, while noting the stock’s rich valuation.

Arm’s licensing and royalty model generates high margins and steady cash flow, funding continued investment in chip designs and AI-related technologies. The company has promoted Arm-based CPUs for data centers and AI infrastructure as a way to diversify revenue beyond smartphones and develop more predictable recurring income.

Operational risks include a weak global smartphone market that would reduce royalty income and supply constraints at advanced chip process nodes that could delay rollouts of Arm-based CPUs for large AI models. New AI-focused products often carry thinner margins at launch compared with Arm’s legacy licensing business, which could limit profitability until volumes scale.

The selloff followed public warnings from leaders of major AI companies about risks tied to rapid AI development, which triggered a broader pullback in AI-related stocks. The market reaction has reduced demand for high-valuation names connected to AI growth.

Short-term trading in Arm will likely reflect updates on the FTC review, progress in data-center and server CPU adoption, and developments in SoftBank’s investment strategy, all of which investors are monitoring for signals about future revenue and profit trends.