Financial analyst Jim Bianco recently pointed out an interesting data phenomenon on social media: in 40 years of historical records, the comparative chart between Personal Consumption Expenditures (PCE) and the Consumer Price Index (CPI) shows significant seasonal anomalies. Bianco, head of Bianco Research Company, raised a question about why these seasonally adjusted volatility characteristics have not appeared universally in other years. This finding has sparked reflection on the methods used for processing economic data. This observation holds important reference value for professionals focused on the accuracy of inflation data and economic forecasting models.