For most of my investing life, I made the same mistake many investors make when looking at banks. I focused on earnings headlines, dividend yields, analyst ratings, and stock charts while paying far less attention to the one thing that actually determines whether a financial institution thrives or struggles: the balance sheet. It took me years to appreciate that banks are fundamentally different from most businesses. If I'm evaluating a technology company, I can spend a significant amount of time studying products, market share, innovation pipelines, and customer growth. If I'm looking at a manufacturing company, I can analyze production capacity, margins, supply chains, and demand trends. Banks are different. A bank's product is money. Its inventory is money. Its raw material is money. Its balance sheet isn't merely a financial statement—it is the business itself. That's why I've increasingly adopted a balance-sheet-first approach whenever I evaluate region...