Producer Price Index (PPI) is a measure used to monitor the inflation in a given economy.
The index value is calculated with the average wholesale prices of raw, semi-finished, and finished goods. Changes in the producer price index (ppi), and especially those in some of its indicative sub-indices, therefore, predict the changes in the consumer price index (cpi). However, it should be also taken into consideration that producer price indices, by nature, cannot include price levels/changes in the services industry.
In the United States, the Bureau of Labor Statistics of the Department of Commerce releases the Consumer Price Index data on a monthly basis.