+ Is American Express Overpriced? Aditya Shah, August 11, 2019August 11, 2019, Investing, Investment Guide, Stocks, Wealth Builders, Amazon, American Express, Berkshire Hathaway, Mastercard, NASDAQ: AMZN, NYSE: AXP, NYSE: BRK.A, NYSE: BRK.B, NYSE: MA, NYSE: V, Visa, Warren Buffett, 0 Observers ask is American Express overpriced because its stock was trading at $126.17 a share on 10 August 2019....