Buy or sell stocks, Sept. 24 -- The key benchmark indices of the Indian stock market witnessed high volatility and ended the session slightly lower. Investor sentiment remained cautious amid concerns over currency depreciation, foreign institutional investor (FII) outflows, and global policy uncertainties. Despite the choppiness, selective buying in major banks, steelmakers, and auto stocks offered some support to the market. The Nifty index opened weakly and hit an intraday low of 25,084 mid-session. However, strong buying at lower levels helped the index recover sharply, reaching an intraday high of 25,261 in the second half. Eventually, the index gave up part of its gains and closed at 25,169.50, down 33 points or 0.13%. The Indian rup...