The total market valuation of all listed firms at the BSE had first hit Rs 100 trillion level on November 28, 2014.
The total market capitalisation (m-cap) of BSE-listed companies rose to Rs 1,00,30,703 crore during the afternoon trade.
The BSE benchmark Sensex was trading higher by 73.11 points at 26,916.25 at 1230 hrs. This is the third straight session of rally for the index.
Analysts said forecast of a normal to excess rainfall, recovery in earnings report card and smart GDP numbers have fuelled rally in the stock market.
There is no possibility of a "deficient" monsoon this year and 96 per cent chances are that the rainfall would be "normal to excess", India Meteorological Department (IMD) said.
The total market valuation of all listed firms at the BSE had first hit Rs 100 trillion level on November 28, 2014.
BSE is among the world's ten largest exchanges in terms of market value, while it is the largest globally for number of firms listed on its platform. Over 3 crore investors trade on it.