Mumbai, Aug. 21 -- The key equity indices traded with minor gains in the mid-morning trade, extending their five-day rally on hopes of a potential GST rate cut. However, investors remained cautious ahead of the US Federal Reserve's annual symposium, awaiting signals on the future direction of interest rates.

The Nifty traded above the 25,100 level. Pharma shares advanced after declining for previous three consecutive trading sessions. Trading activity may be volatile today as markets brace for the weekly expiry of Nifty50 futures and options contracts.

At 11:30 ST, the barometer index, the S&P BSE Sensex, added 266.44 points or 0.33% to 82,121.70. The Nifty 50 index rose 69.70 points or 0.28% to 25,119.25.

The broader market outperform...