The slowdown essay moved markets: Nasdaq 100 futures off 1.5%, Nvidia down 3%, AMD down 5.7%
NBC News (corroborated by CNN Business, Forbes, Reuters/Investing.com)·high signal
Monday premarket trading priced in the CEOs' safety warning directly. Nasdaq 100 futures fell 1.5% and S&P 500 futures 0.8%; Nvidia dropped 3%, AMD 5.7%, and Arm, Marvell and CoreWeave each slid about 6%. Altman's separate statement that OpenAI will not IPO in 2026 because "right now would be an ill-advised moment to go public" compounded it. This is the first measurable market cost attached to an AI-safety statement from the labs.