Nifty futures has rolled around 66% vs 73% with respect to last month, and the open interest for the new February contract is also higher by around 28 lkh implying fresh long positions at around 10950 levels. BankNifty futures rolled at around 71% vs 75% compared to last month. The open interest of BankNifty futures in this series is higher by around 10 lkh, due to fresh long positions seen in the last fortnight of January expiry.