For the January series, maximum Call Open Interest (OI) is still placed at 15,000 strike with 24.93 lakh contracts. This is followed by 19.98 lakh contracts at 14,500 strike. However, massive Call writing was seen at 14,500 and 14,400 and Call unwinding was at levels higher than 15,000. Put OI is the most at 14,000 strike with 31.32 lakh contracts, followed by 13,000 strike with 24.28 lakh contracts