Palantir stock has crushed the market this year, thanks in large part to major contract wins and its ability to outmaneuver new tariff policies. While following the momentum in Palantir stock can be tempting, the company’s current valuation trends look unsustainable. U.S. Rep. Marjorie Taylor Greene, a Georgia Republican, recently disclosed some buys in red-hot artificial intelligence (AI) stock Palantir Technologies (NASDAQ: PLTR), according to data compiled by Capitol Trades, which follows the trading activity of politicians.