The changes will take place after the close of trade on May 31, 2013, MSCI said in a statement.
There have been no deletions from the MSCI India index, the index provider added.
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Reacting to the news of addition, shares of all these companies saw robust buying interest.
Shares of GlaxoSmithKline Consumer surged 7.70% to touch its record high of Rs 4,790, while Apollo Hospitals shot-up by 8.02% to an all-time high of Rs 1,060 on the BSE.
Similarly, Oil India gained 3.22%, while Wockhardt jumped 3.51%, in an overall positive stock market.
Inclusions in MSCI small-cap index includes stocks like Alembic Pharma, CARE, Eclerx Services, Godrej Properties, IRB Infrastructure, JK Cement, PC Jeweller, SE Investments and Videocon Industries.