There’s nothing like being added to the S&P 500 Index ($SPX) to get a stock going, eh? Carvana (CVNA) had that honor bestowed on it Monday, as it was added by the S&P committee to its most iconic list of large-cap stocks. But now that the news is out, and the stock has performed like, shall we say, a flying car, is this a sell-the-news situation, or just the start of something bigger for the Arizona-based company? If you are familiar with my work here, you probably know the answer is neither. When a stock ...