AMD stock continues rally after OpenAI deal, now up 43% this week so far (www.cnbc.com)

AMD shares jumped again Wednesday (up 11%), pushing the chipmaker’s gain this week to roughly 43% after OpenAI announced plans to buy “billions of dollars” of AI equipment from AMD and entered an agreement that could give it up to a 10% stake in the company depending on stock price and partnership milestones. AMD’s market cap hit about $380 billion after a 24% surge Monday and 4% rise Tuesday — on pace for its best weekly performance since April 2016. CEO Lisa Su called the arrangement a “win‑win,” saying AMD’s AI chips are ready for “at‑scale deployments” in large data centers, while Nvidia’s Jensen Huang called the move “surprising” and “clever” on CNBC. For the AI/ML community, the deal is a major validation of AMD as a credible alternative to Nvidia in the high-performance GPU market that powers model training and inference. If OpenAI actually deploys AMD accelerators at scale, it could shift buying patterns, ease supply pressure on Nvidia hardware, and accelerate investment in AMD’s software stack and ecosystem (important for toolchains and performance parity with CUDA-based workflows). Technical details such as which AMD accelerators will be used, performance vs. Nvidia on large models, and integration into existing cloud stacks remain to be disclosed, but the announcement already reshapes competitive dynamics and investor expectations across AI infrastructure.