AI slowdown talk sinks Nvidia 3%, lifts Alphabet

The debate over AI's existential risks moved from conference panels to trading desks on Monday. After Anthropic CEO Dario Amodei called for stronger safety measures and even a slowdown in model development, and OpenAI CEO Sam Altman and other leaders backed him, investors began pricing in a scenario that had until then quietly sat in risk models: what if the frontier AI race actually slows?

The market's answer was a sharp split. Chipmakers and data-center builders, the picks and shovels of the AI boom, sold off hard. Nvidia fell more than 3%, Intel, AMD and Marvell dropped 5% to 6%, and the Philadelphia Semiconductor Index lost almost 6%. Meanwhile, the hyperscalers doing the spending, Alphabet, Microsoft and Meta, rose. Gil Luria of D.A. Davidson explained the logic: if progress slows, these companies can stop adding capacity and harvest returns from what they already built, sending cash flow higher, similar to Amazon's post-pandemic warehouse pullback. Not everyone agrees. Analyst Dan Ives argued software companies and model developers could use extra time to catch up, and noted China is not slowing, with Z.AI raising another $5 billion over the weekend. Luria himself doubts the slowdown is real, since no lab has announced a moratorium. The outcome hinges on whether any lab actually commits to slowing, and for now, the market is treating the possibility as real enough to trade on.