What would you do if I said one sleight of hand could make you dozens of percent returns in just a few weeks once you understand proper sector diversification for long-term or value investments? A big lesson here, but also always remember to ponder why you're investing in a sector in the first place. AMC obviously had ups and downs, but this could have turned out to be a much more red story since I hastily glanced over the financials of both these movie stocks.