The zone of 10,500-10,550 is a crucial support level for Nifty. Any close below this level would lead to a further decline towards the levels of 10,200-10,170. On the upside, an immediate hurdle for the bulls would be the level of 10,670. Stocks in news: Bharti Airtel, Infosys, Yes Bank, Bharat Electronics, Salasar Techno Engineering.