We are not seeing any major positions in either directions, overall activity in terms of Open Interest is quite mixed in case of Nifty. The highest OI concentration in this series is seen in 11600 and on the higher side it is 11800. Major support for Bank Nifty at 30000-30200. We advise traders to use declines to add long positions in case of Bank Index, says Sneha Seth, Derivatives Analyst at Angel Broking.