The data displays the monthly chained consumer price index from July 2017 to July 2018. The data represents U.S. city averages. The base period was December 1999=100. The chain weighted CPI incorporates the average changes in the quantity of goods purchased, along with standard pricing effects. This allows the chain weighted CPI to reflect situations where customers shift the weight of their purchases from one area of spending to another. The chained consumer price index was at 142.52 in July 2018.
