Ken Griffin of Citadel sold 5.1 million shares of Palantir, reducing his stake by 91%. Meanwhile, he bought 4.7 million shares of Nvidia, increasing his stake by 194%. Nvidia is the second largest position in Citadel's portfolio, excluding options contracts and index funds.

Palantir Technologies stock (NASDAQ: PLTR) has had a solid run, rising by almost 4x since the beginning of the year to about $66 presently.

Artificial intelligence (AI) has defined the investment narrative of 2024, and Palantir Technologies Inc. (PLTR) has emerged as a massive beneficiary of this transformative trend thanks to its cutting-edge Artificial Intelligence Platform (AIP),

While it is undeniable that Palantir is a high-quality data mining stock with robust AI-powered tailwinds, the company's sky-high valuation -- a price-to-sales ratio near 60 -- requires investors to exercise caution. Here's what astute investors should know about Palantir.