Key Takeaways AI stocks had a volatile week as Wall Street reckoned with the implications of a sophisticated, cost-efficient AI model from Chinese start-up DeepSeek.Semiconductor stocks such as Nvidia and Broadcom sold off on Monday as investors worried DeepSeek's efficiencies would temper enthusiasm for AI infrastructure spending.

"In our view this is a correction and not the start of a sustained bear market," Goldman Sachs said. DeepSeek sparked a $1 trillion market rout on Monday.

As we’ve written numerous times elsewhere, the cause of Monday’s DeepSeek market wobble were fears that good-enough LLMs won’t cost billions to build and run, and that supplying them won’t be a winner-take-all competition.