Current NVIDIA stock is a classic example of a gamma squeeze. If a market maker is short a call/put, he is hedging with stock in the direction of the movement.

Current NVIDIA stock is a classic example of a gamma squeeze. If a market maker is short a call/put, he is hedging with stock in the direction of the movement. If you buy out of the money calls(i.e NVDA stock is at 500 and you are buying a 520 call), especially shorter dated ones, then the market maker will end up supporting a rally if it comes around via hedging(this is also exacerbated by the fact that retail, which is the segment of the market usually "aping" into OTMs, doesn't actually trade the vol component of options, meaning that they don't sell short stock as it goes higher).