Key Highlights

● AMD agreed to buy World Labs in an $8.2 billion all-stock deal, paid with roughly 13 million new AMD shares.

● Shares rose to $615.32 on Tuesday, from Monday's close of $607.87, and the deal is expected to close by end-2026.

● Founder Fei-Fei Li will become AMD's executive vice president and chief scientist, reporting directly to chief executive Lisa Su.

● Nvidia announced a $150 billion buyback on Monday, and chip stocks outperformed on a day the broader market slipped.

Advanced Micro Devices (NASDAQ:AMD) made one of the boldest moves of Tuesday, September 29, 2026, agreeing to buy World Labs, the artificial intelligence startup founded by Fei-Fei Li, in an $8.2 billion all-stock deal. The shares rose on the news, ending at $615.32, up from Monday's close of $607.87. The deal will be paid with roughly 13 million new AMD shares and is expected to close by the end of 2026.

Why a Chipmaker Wants a Model Lab

Li will become AMD's executive vice president and chief scientist, reporting directly to chief executive Lisa Su. For AMD, the logic is about design, not just talent. Chips for AI are built years in advance, and knowing where models are heading can shape everything from memory bandwidth to how processors talk to each other. Su said building the compute platforms for the next generation of AI requires a deep understanding of how models are evolving, and that Li's team would bring exceptional research leadership and model expertise.

A New Phase in the Chip Race

For years the AI chip contest was mostly about raw performance and supply. Now the biggest players are pushing deeper into software, models and systems, trying to lock in customers with a full stack. Nvidia (NASDAQ:NVDA), AMD's chief rival, announced a $150 billion share buyback on Monday, described as the largest in U.S. history. Using stock rather than cash also lets AMD keep its cash for manufacturing, research and other priorities, and the roughly 13 million new shares represent only a small addition to its share count.

AI Fever Sets the Backdrop

A leaked Anthropic IPO prospectus pointed to a valuation target above $2 trillion and 12-fold revenue growth in 2025. Semiconductors outperformed: the SMH chip ETF gained, Applied Materials climbed to about $512.29, and Arm Holdings and Marvell Technology also rose sharply. AMD's own gain followed a drop on Monday.

The Wider Tape

The Nasdaq-100 edged higher to 30,339.33 on the chip rally, even as the S&P 500 slipped 12.85 points to 7,670.84 and the Dow Jones Industrial Average fell 131.59 points to 51,349.92. The Nasdaq Composite ended nearly flat at 26,797.54. Rising long-term Treasury yields were the main weight on the market, with the 30-year at its highest level since 2002 and the 10-year near a two-decade high.

Closing Watch for AMD Holders

The World Labs purchase is expected to close by the end of 2026, and investors will look for details on how Li's research feeds AMD's chip roadmap. Micron's fiscal fourth-quarter results on Wednesday, September 30, will offer a read on AI memory demand, alongside August PCE inflation and the third GDP estimate. The September jobs report is due Friday, October 2, and the Federal Reserve meets October 27 to 28.