American Express (AXP) has outperformed most credit card stocks while presenting more upside for long-term investors, prompting me to be bullish. Rising profit margins, strong sales growth, and a young customer base are some of the catalysts that have resulted in a 34% year-to-date gain.

Shares of American Express Co. AXP rallied 2.81% to $250.92 Monday, on what proved to be an all-around great trading session for the stock market, with the S&P 500 Index SPX rising 1.16% to 5,471.05 and the Dow Jones Industrial Average DJIA rising 1.20% to 40,829.59.