As of the latest data point for Q4'25, American Express (AXP) reports a PEG Ratio (5yr expected) of -1.79, indicating a significant negative value at the end of the observed period. This negative PEG ratio suggests that either the company's earnings growth expectations have turned negative or there are substantial downward revisions to growth forecasts. Over the period from Q1'23 to Q4'25, the PEG ratio has exhibited considerable volatility, fluctuating between positive and negative values. After starting at 1.06 in Q1'23, the ratio declined sharply, reaching negative territory in Q4'23 and again in Q3'24 and Q4'24, before rebounding to a peak of 1.57 in Q2'25. The overall trend highlights instability in growth expectations, with notable inflection points and abrupt reversals, reflecting shifting market sentiment or changes in earnings projections for AXP during this timeframe.