Based on the latest data from August 2025, American Express (AXP) is trading at $331.28, positioning the stock in the "Fair" valuation zone between the 15.7x and 19.6x PE multiples. Specifically, the stock price sits above the 15.7x PE boundary of $225.88 but remains well below the 19.6x PE threshold of $282.32, indicating a reasonable valuation that neither suggests significant undervaluation nor overvaluation concerns. Analyzing the historical trend reveals a dramatic valuation expansion story for AXP over the past five years. The stock began 2020 in the "Fair" zone around $120, but the COVID-19 pandemic initially compressed valuations, pushing the stock briefly into more attractive "Value" territory between the 11.8x and 15.7x PE multiples during mid-2020 when prices dropped to the $80 range. However, since late 2020, AXP has experienced substantial valuation expansion, with the stock price more than tripling from pandemic lows. The most significant acceleration occurred from 2023 onwards, with the stock climbing from around $145 to current levels above $330. Throughout this period, the PE boundaries themselves have generally trended upward, suggesting improving earnings fundamentals, but the stock price appreciation has outpaced this growth, resulting in the current positioning in the upper portion of the "Fair" valuation range. This represents a notable shift from the more attractive "Value" and lower "Fair" zone positioning that characterized much of 2020-2022.