I've been a card-carrying Costco member since 2008, yet I never bought its stock-a decision, or more precisely, an oversight, that has grown increasingly painful over the years, especially given that I consider myself a devotedI am a corporate lawyer with an MBA and a long-standing interest in value investing. After spending 7 years practicing at several prestigious Wall Street and Silicon Valley law firms as a corporate transactional lawyer, I founded and have been operating my own boutique law firm for th ...