PPI - Producer Price Index; Core-PPI - Bureau of Labor and Statistics; The second full week of each month, 8:30am EST, covers previous month data. The PPI is not as widely used as the CPI, but it is still considered to be a good indicator of inflation. This indicator reflects the change of manufacturers’ cost of input (raw materials; semi-finished goods; etc.). Formerly known as the "Wholesale Price Index", the PPI is a basket of various indexes covering a wide range of areas affecting domestic producers. Each month approximately 100,000 prices are collected from 30,000 production and manufacturing firms. It is not as strong as the CPI in detecting inflation, but because it includes goods being produced it is often a forecast of future CPI releases.