Open interest in November futures declined by 10.36 per cent (6.28 lakh). The implied volatility increased in call options to 26-27 per cent from 23-24 per cent. On the other hand, the volatility remained almost unchanged at 28-30 per cent in put options.
In stock futures and options, the most active counters were Tata Motors, Tata Steel, Satyam and Reliance Industries.
Auto stocks continued to add open positions in the futures segment. Tata Motors added three lakh shares in the November series. Maruti and Mahindra & Mahindra shed some of the positions added in early trades.
The implied volatility in auto stocks increased by 2 per cent to 56-58 per cent. Investors and traders hedged their long positions by writing call options of Tata Motors with strikes of Rs 380, Rs 390 and Rs 400.
Technology stock too shed open interest in the futures segment. Satyam shed 4.5 lakh shares and Infosys shed 30,000 shares in open positions. Cement stocks added open interest in futures despite a fall in prices.
In banking, there was no significant change in open positions, except in Punjab National Bank. The counter added two lakh shares in open interest positions in the futures segment. The cost of carry in bank stocks was between 16 per cent and 20 per cent.
Canara Bank saw some action in call options with a strike of 140 and added one lakh shares in open positions.
