Wells Fargo (NYSE:WFC), Citigroup (NYSE:C), and Bank of America (NYSE:BAC) are all huge, all profitable, and yet, all strikingly different. And its in these differences we as investors can find value and opportunity (and also avoid undue risk). 

In the slideshow below, we'll break down the fundamentals of profitability at these three megabanks to discover exactly what separates the men from the boys.

Fool contributor Jay Jenkins has no position in any stocks mentioned. The Motley Fool recommends Bank of America and Wells Fargo and owns shares of Bank of America, Citigroup, and Wells Fargo. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.