Tata Group's Trent and Bharat Electronics were poised to join the Nifty 50 index during the September reshuffle, as predicted by IDBI Capital. Trent's shares increased 84% and Bharat Electronics rose 68% this year. LTI Mindtree and Divi's Laboratories were likely to be excluded. The index review is based on semi-annual market data, effective from September 30.