My understanding is that DeepSeek still used Nvidia just older models

That's the funniest part here, the sell off makes no sense. So what if some companies are better at utilizing AI than others, it all runs in the same hardware. Why sell stock in the hardware company? (Besides the separate issue of it being totally overvalued at the moment)

This would be kind of like if a study showed that American pilots were more skilled than European pilots, so investors sold stock in airbus... Either way, the pilots still need planes to fly...