One of the hottest stocks this year has been Palantir (PLTR 4.87%). The company's strong results and inclusion into the S&P 500 have helped its stock soar more than 250% this year, as of this writing.While the stock has been a great performer this year, the question on many investors' minds is whether the stock is still a buy after its big gains this year. Let's take a closer look at both the buy and sell cases regarding Palantir stock to help you decide.Accelerating growth is the anchor to the buy case for ...