Mumbai, Oct. 29 -- The key equity indices traded with substantial gains in mid-afternoon trade. Sentiment improved after the US Federal Reserve kept interest rates unchanged. Buying by foreign portfolio investors (FPIs), who purchased shares worth Rs 872 crore on Wednesday, supported the recovery. However, elevated crude oil prices and US Treasury yields near 5% remained key concerns. The Nifty traded above 22,800 mark.

Private bank shares gained for second consecutive trading sessions.

At 14:25 IST, the S&P BSE Sensex advanced 841.34 points or 1.15% to 74,088.75. The Nifty 50 index rose 233.95 points or 1.03% to 22,934.20.

In the broader market, the Nifty MidCap 150 Index rose 0.51% and the BSE 250 SmallCap Index added 0.54%.

The mar...