Legendary fund manager Li Lu (who Charlie Munger backed) once said, ‘The biggest investment risk is not the volatility of prices, but whether you will suffer a permanent loss of capital.’ When we think about how risky a company is, we always like to look at its use of debt, since debt overload can lead to ruin. We note that Waste Management, Inc. (NYSE:WM) does have debt on its balance sheet. But is this debt a concern to shareholders?
Debt is a tool to help businesses grow, but if a business is incapable of paying…

