Palantir Technologies (NASDAQ: PLTR) recently announced mind-blowing earnings results, from double-digit revenue growth across businesses to record deal values as well as numbers of deals. The software company has built its business over more than 20 years,

Despite impressive profitability and sales growth, PLTR's stock valuation at 53.5x leading sales is frothy, necessitating a rating change to “Sell.” Read more here.

Palantir stock is trading at a lofty valuation "which history suggests is nearly impossible to grow into," Deutsche Bank's Brad Zelnick said.

What Happened? Shares of data-mining and analytics company Palantir (NYSE:PLTR) jumped 26.9% in the morning session after the company reported impressive fourth-quarter results, which blew past analysts' billings,