Core Viewpoint - The upcoming reshuffle in the BSE Sensex on December 22 signifies a shift in India's equity benchmark, with InterGlobe Aviation replacing Tata Motors Passenger Vehicles, reflecting changes in market leadership and corporate restructuring [5]. Group 1: Index Changes - InterGlobe Aviation will replace Tata Motors Passenger Vehicles in the Sensex index, marking a significant transition in the index composition [5]. - IDFC First Bank Ltd will be included in the BSE 100 index, replacing Adani Green Energy Ltd [5]. - Max Healthcare Institute Ltd will be added to the BSE Sensex 50, while IndusInd Bank Ltd will be removed [5]. - In the BSE Sensex Next 50 index, IndusInd Bank and IDFC First Bank will replace Max Healthcare Institute Ltd and Adani Green Energy [5]. Group 2: Market Implications - The inclusion of InterGlobe Aviation indicates its growing market prominence, while Tata Motors PV's exit is attributed to its recent demerger from Tata Motors [5]. - The rebalancing of the indices ensures they remain representative of India's evolving market landscape [4][5]. - The changes will necessitate mandatory reallocation by index-tracking funds and exchange-traded funds, leading to mechanical buying and selling as portfolios adjust to the new index composition [4][5].