Over the past couple of years, Nvidia (NVDA 0.53%) and Palantir Technologies (PLTR -0.33%) have both shown their strengths in artificial intelligence (AI) -- and as a result, their earnings and stock performance have soared. Last year, Nvidia was the best-performing component in the Dow Jones Industrial Average (though it only was added to the venerable blue chip index in November), and Palantir posted the biggest gain in the S&P 500.Both of these players have continued to advance, and considering that we'r ...