Bullish momentum which spilled over from October series in the form of short covering was held intact as bulls were unperturbed by any worries on global front. November series also witnessed fresh All time highs being registered on a closing basis. Bullish sentiments were distinctly visible as participants were confident of rolling over their bullish bets which was evident in high roll cost in Nifty. Last time Nifty had witnessed such a high roll cost was way back in September’20 series.