Wholesale Price Index (WPI) measures the average change in the prices of commodities for bulk sale at the level of early stage of transactions.  

• The index basket of the WPI covers commodities falling under the three major groups namely Primary Articles, Fuel and Power and Manufactured products.  
• The index basket of the present 2011-12 series has a total of 697items including 117 items for Primary Articles, 16 items for Fuel & Power and 564 items for Manufactured Products. 

Source: TMH Ramesh Singh