OpenAI CEO Sam Altman said the company will not go public in 2026. Fortune reported that OpenAI had previously discussed pulling a potential IPO forward and floated a possible listing valuation of about $1 trillion. OpenAI said it raised $122 billion in committed capital in March at a postmoney valuation of $852 billion, highlighting computing power as a strategic advantage.

Major U.S. stock indexes fell on Monday, led lower by AI-related shares. Industry leaders voiced concerns about AI safety risks and urged a slowdown in development, prompting investors to reassess the sector. Nvidia dropped 3% and Amazon fell more than 1%, while chipmakers such as Intel and AMD also slid. Defensive areas including consumer staples and healthcare proved more resilient.

SanDisk said demand for AI-related storage is running ahead of expectations, with customers extending NBMs and increasing NAND purchases. Management said competitors are spending about 2.7 times more capital per petabyte, underscoring what it described as the company’s capital-efficiency advantage. The stock trades at 7.6x forward earnings; a return to an 11x multiple would imply about $2,350 per share, or 44% upside.

Microsoft said Azure’s annualized revenue has surpassed $100 billion. The company’s data-center expansion plans suggest compute capacity could triple to 38 GW by 2032, signaling confidence in long-term cloud demand. Copilot usage is stabilizing, which management says could support further monetization and platform scaling.

Meta Platforms shares were down 1.2% for the year through the Sept. 10 close, lagging most large-cap tech peers. The company plans to spend $130 billion to $145 billion this year on AI infrastructure, and free cash flow fell from $13.2 billion in Q1 to $1.7 billion in Q2. Despite that squeeze, the article argues Meta’s operating performance looks stronger than its share price implies.

U.S. stocks closed lower on Monday as concerns about the pace and safety of artificial intelligence weighed on technology shares. The S&P 500 fell 0.6%, the Nasdaq Composite lost 0.9%, and the Dow slipped 160 points. Chipmakers led the declines, with Nvidia and Broadcom down 3% each, while AMD and Intel fell 5% apiece and Marvell dropped 6%. Oil prices rose sharply, with WTI up 3% above $103 a barrel and Brent gaining 4.5% above $109.

Markets are reassessing whether the AI boom can generate returns sufficient to justify the scale of spending, as investors question whether roughly $900 billion in AI outlays by major tech firms over the past two years can be covered by future profits. Anthropic is preparing for an imminent IPO to raise additional billions to fund costly research and development and data-center buildouts. Analysts say the ability of AI-linked valuations to keep supporting global equity indices could be tested if profit delivery is delayed while valuations stay elevated.

Definium Therapeutics said its synthetic LSD delivered positive results in easing anxiety symptoms, sending the stock sharply higher again after the announcement. The company’s shares are up 190% in 2026. The clinical trial success further lifted investor confidence.