Alex Karp, chief executive officer of Palantir Technologies Inc., walks to the morning session at the Allen & Co. Media and Technology Conference in Sun Valley, Idaho, US, on Wednesday, July 10, 2024.Palantir shares popped 13% on Monday and are trading at their highest since early 2021 after the announcement late Friday that the stock is being added to the S&P 500.Palantir is joining the index along with Dell. They're replacing American Airlines and Etsy, S&P Global said in a press release. Shares of compan ...