It's possible this could be construed as price fixing. If the DOJ cared it could open an investigation, leading to a suit, leading to discovery of communications between Altman and all the other relevant players. If price manipulation is an apparent factor in their decision making it may be a very easy case.

https://fortune.com/2025/11/23/ai-rivals-like-openai-nvidia-...

Obviously kind of a moot point because whether it violates antitrust law or not, what is guaranteed is the US Government is not going to do anything

Market manipulation is a crime under the Securities Exchange Act of 1934. You can't buy things to influence the price or the market, only to use or resell.

https://en.wikipedia.org/wiki/Market_manipulation

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