Why Is Palantir Stock Down Today?

• PLTR stock drops 6% despite new U.S. Army TITAN contract and hiring of AIG's Peter Zaffino. • Profit-taking at 144 P/E and rising bond yields pressure growth stock valuation. • Underlying business remains strong; valuation is the main risk. Palantir (PLTR) fell 6% on Sept. 2, 2026 after winning an Army TITAN contract and hiring AIG's Peter Zaffino. Profit-taking at a 144 P/E and rising bond yields weighed on the stock despite strong business fundamentals.