A persistent challenge when evaluating a very large, globally diversified company is determining what's most important. Do the CEOs of the world's largest global banks really understand all material aspects of the businesses they lead? Part of the solution is to apply a framework to every investment decision, and though it varies by asset class, the core tenets remain the same. We'll start with what Exxon does and break down its activities by major division to obtain a strong grasp on the company's fundamentals. We'll discuss Exxon Mobil's (XOM) challenges head-on and