About United States CPI Trimmed Mean YoY
In the United States, the 16 percent trimmed-mean CPI is a weighted average of one-month inflation rates of components whose expenditure weights fall below the 92nd percentile and above the 8th percentile of price changes. The Cleveland Fed calculates the 16 percent trimmed-mean CPI by taking a weighted average across the component inflation rates after excluding, or trimming, items whose expenditure weights fall in the top 8 percent and bottom 8 percent of the price change distribution.