什麽是CPI？

最近可能大家經常聽說一句話，就是我們現在的物價上漲是CPI的結搆性上漲，那麽，什麽是CPI呢？

　　In economics, a Consumer Price Index （CPI, also retail price index） is a statistical measure of a weighted average of prices of a specified set of goods and services purchased by wage earners in urban areas. It is a price index which tracks the prices of a specified set of consumer goods and services, providing a measure of inflation. The CPI is a fixed quantity price index and a sort of cost-of-living index.

　　The CPI can be used to track changes in prices of all goods and services purchased for consumption by urban households. User fees （such as water and sewer service） and sales and excise taxes paid by the consumer are also included. Income taxes and investment items （like stocks, bonds, life insurance, and homes） are not included.

　　CPI就是消費者物價指數，是反映與居民生活有關的産品及勞務價格統計出來的物價變動指標，通常作爲觀察通貨膨脹水平的重要指標。如果消費者物價指數陞幅過大，表明通脹已經成爲經濟不穩定因素，央行會有緊縮貨幣政策和財政政策的風險，從而造成經濟前景不明朗。因此，該指數過高的陞幅往往不被市場歡迎。