Buy or sell stocks, Oct. 8 -- The key benchmark indices of the Indian stock market gave up part of their intraday momentum but sustained their upward trajectory for the fourth consecutive session on October 7, amid heightened volatility due to the weekly Nifty options expiry. The Nifty eventually concluded marginally above the 25,100 level, after scaling an intraday high of 25,220.9. At the close, the Sensex advanced 136.63 points, or 0.17%, to 81,926.75, while the Nifty rose 30.65 points, or 0.12%, to end at 25,108.30.

Sector-wise, Realty, Energy, Oil & Gas, Pharma, Telecom, and Consumer Durables outperformed, gaining between 0.3% and 2%. In contrast, selective profit booking was observed in Defence and FMCG names. On the broader front,...