The drugmaker's shares have replaced private sector electricity producer Tata Power on the Sensex.
The announcement was made on May 22, 2015. Since that date Tata Power has lost around 6 per cent, while Lupin has gained as much as 7 per cent.
Being a part of Sensex, Lupin will witness buying from passive funds, which track the return of Sensex and also trading volume in the counter is likely to surge, analysts say.
Shares in Lupin ended 0.58 per cent lower at Rs 1,806.20, while shares of Tata Power closed 3.04 per cent higher at Rs 74.5.
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