American Express Stock: Buy, Sell, or Hold?

The S&P 500 is on a tear, and one stock surging alongside it is American Express (AXP -0.03%). American Express has a long track record of success in the market, thanks to its iconic branding and positioning among consumers. The longtime Warren Buffett stock has gained almost 62% since hitting a 52-week low last October, and it now trades at a premium valuation.Here's what you should consider if you're thinking about buying American Express today.American Express' luxury appealAccording to data from WalletH ...