Of the four US banks, Citigroup (NYSE: C ) is the only one whose stock is still trading significantly below its all-time high. While rivals JPMorgan ( JPM ), Bank of America ( BAC ), and WellsAlways on the hunt for undervalued, promising stocks with a focus on risk and reward. Limited risks and decent to high upside by knowing what one's owning. I strongly believe that the best investment ideas are often the simplest. If contrarian, the better.Analyst’s Disclosure:I/we have no stock, option or similar deriv ...