The latest data point for Pfizer's (PFE) Operation Income in Q4'25 shows a loss of $1.64B USD, marking a significant downturn from the positive figures in the preceding quarters of 2025. This represents a sharp decline compared to the $3.33B USD profit in Q3'25, contributing to a year-over-year change of -163.4%. Over the period from Q1'23 to Q4'25, Operation Income exhibits high volatility with alternating profits and losses, starting with a strong $6.27B USD in Q1'23 before plunging into negative territory in Q3'23 (-$3.35B USD) and Q4'23 (-$4.13B USD), the lowest points. Recovery occurred in Q1'24 ($3.42B USD) and Q3'24 ($4.72B USD), but instability persisted with minor losses in Q2'24 and Q4'24, followed by consistent profits in Q1'25 to Q3'25 (ranging from $2.79B USD to $3.34B USD) before the Q4'25 reversal. Year-over-year growth was predominantly negative until Q3'24 (240.7%) and Q2'25 (3,026.9%), highlighting erratic performance likely influenced by operational or market factors.