All the sectors ended in red with Nifty PSU Bank and Nifty Realty leading the losers. In the afternoon session, we saw heavy open interest addition in the 15,000-call option in the current weekly options series. However, it has now shifted to 14,700 call option as more than 26 lakh open interest addition at this strike price. Meanwhile, unwinding was seen in 15,000 and 14,900 put options.