Nasdaq composite: 12,690.26, down 2.4% The billionaire investor Ron Baron told CNBC on Thursday that despite his long-term bullishness on Tesla, he had sold about 25% of his clients' stake in the electric-vehicle manufacturer after its position became too concentrated. The weakness in technology stocks hasn't stopped Cathie Wood's Ark Invest from buying the dip in high-flying stocks. Ark's daily trading disclosures indicated that the firm bought millions of shares of Palantir on Wednesday amid the decline. Advertisement Going public in the US via a special-purpose acquisition company has reportedly caught the interest of Flipkart, the Indian e-commerce giant owned by Walmart. Gabe Plotkin's Melvin Capital, which was at the center of the GameStop short-squeeze earlier this year, recouped some of its losses and gained 22% in February.