Examining the present methodology of compilation of the wholesale price index and the issues emerging out of the use of a remote base series, a weighting diagram of the current WPI series has been derived for the year 1988-89 to study the changes in structure of wholesale markets in the country during the last one decade. Due to data constraints, the weighting diagram has been derived from subgroup-level upwards in case of 'Manufactured Products' and commodity- levelupwards in case of 'Primary Articles'. The structure so derived is significantly different from the one which prevailed