Indian markets are poised for a positive opening, with GIFT Nifty indicating gains. Key stocks like Bharti Airtel are in focus due to a large block deal valued at Rs 7,100 crore. Indian Overseas Bank expects a Rs 835 crore tax refund, while Indraprastha Gas forms a JV for biofuel projects. NCC secured a Rs 2,062 crore hospital expansion contract, Zydus Lifesciences received US FDA nod for tablets, and Apollo Micro Systems inked a defense tech alliance.