It's not just companies with exposure to the hypergrowth artificial intelligence space that have registered huge returns. Even a boring retailer, such as Costco (COST -1.04%), is up big. Its shares have more than tripled just in the last five years. For comparison's sake, the S&P 500 is up 86% during the same time. This has undoubtedly been a magnificent stock. It's already up double digits in 2024 (as of March 21) as the momentum continues. And it was a longtime favorite of the late great Charlie Munger. H ...