What is the difference between CPI and CPIX?

CPI is the abbreviation for Consumer Price Index measure, which is a primary indexing method. CPIX is the abbreviation for Consumer Price Index inflation rate, which can basically be referred to as a derivation from the Consumer Price Index. It can be termed as CPI, excluding mortgage rates. The Consumer Price Index inflation rate can be determined by comparing the CPI of a current month with the CPI of the corresponding month during the past year.

On the other hand, CPIX is the Consumer Price Index minus mortgage costs. Different from the Consumer Price Index, the CPIX actually does not include aspects of the investment of the ownership of the house. The CPIX would include a rent calculation instead of the investment aspects. CPIX is used in the indication of inflation rates in the Metropolitan and Urban areas. While on the other hand, the Consumer Price Index takes all of the areas into account.