If there's one thing I've learned from years of looking at bank stocks, it's that most investors spend far too much time staring at earnings per share and not nearly enough time asking where those earnings actually came from. Banking is one of the few industries where a company can report impressive profits while quietly accumulating risks that won't become obvious until months or even years later. A bank can appear healthy on the surface, reward shareholders with dividend increases, authorize stock buybacks, and receive glowing analyst reports, all while the quality of its loan portfolio slowly deteriorates beneath the headlines. By the time those problems become impossible to ignore, the market usually isn't surprised because it has already begun adjusting valuations long before the average investor notices anything unusual. That's why I rarely begin evaluating a bank by looking at revenue growth or quarterly earnings. Those numbers matter, but they don't ...