Buy or sell stocks, Oct. 17 -- The key benchmark indices of the Indian stock market extended their upward trajectory for the second consecutive session on October 16, with benchmark indices scaling fresh multi-month highs, buoyed by sustained buying across sectors. The Nifty 50 breached the psychological 25,600 mark intraday for the first time since June 27, underpinned by robust investor sentiment and sector-wide participation, before witnessing mild profit-taking in the final trading hour. By the closing bell, the BSE Sensex surged 862.23 points, or 1.04%, to settle at 83,467.66, while the Nifty 50 advanced 261.75 points, or 1.03%, to close at 25,585.30. The broader market also ended in the green, with the Nifty Midcap and Smallcap indi...