The stocks selling off the most over the last couple of weeks are the same ones that led the stock market higher over the previous two years: artificial intelligence stocks. Several factors have led to the recent dip in the biggest AI stocks,

Like Rigetti, Palantir's stock skyrocketed during the past year, with its share price up 226% through the week ended March 7. The reason is the company's success with its Artificial Intelligence Platform (AIP).

The last time Berkshire aggressively bought stocks was in early 2022 when the S&P 500 was 20% below current levels.