The Federal Reserve faces a critical inflation puzzle as mixed signals emerge across key economic indicators. The PCE price index, the Fed's preferred inflation measure, accelerated to 2.9% year-over-year in December, marking the highest level in nearly two years. Core PCE reached 3.0%, well above the Fed's 2% target and showing an upward trend since April. Meanwhile, GDP inflation surged to 3.7% in the fourth quarter, reflecting broader price pressures throughout the economy. However, the Consumer Price Index tells a different story, with cooling inflation readings driven primarily by declining housing costs. This divergence between PCE and CPI inflation measures reflects methodological differences in how housing is weighted, creating uncertainty about the true inflation trajectory and complicating the Fed's policy decisions moving forward.
