CPI= (the value of a group of fixed commodities at current price/the value of a group of fixed commodities at base price) × 100%. This set of values calculated at the current price should be multiplied by the current price by the number of base periods.

Consumer price index, abbreviated as CPI in English, is a price change index based on the prices of products and services related to residents' lives, and is usually used as an important indicator to observe the level of inflation. Starting from 2011,China's CPI began to calculate the price index series based on 20 10.

Compilation purpose

Consumer price index (CPI) is an important macroeconomic indicator reflecting the changes in the price level of consumer goods and services related to residents' lives, and it is also an important indicator for macroeconomic analysis and decision-making and national economic accounting. Generally speaking, the level of CPI directly affects the introduction and intensity of national macro-control measures, such as whether the central bank adjusts interest rates and deposit reserve ratio. At the same time, the level of CPI also indirectly affects the changes of capital markets (such as stock market, futures market, capital market and financial market).