In the Indian stock market, the Sensex ended with modest gains while the Nifty settled nearly unchanged in a volatile trading session today. The 30-share index at the Bombay Stock Exchange, Sensex, advanced 260 points, or 0.32 percent, to close at 80,502. The National Stock Exchange Nifty-50 increased marginally by 13 points to settle at 24,347. Conversely, the broader market indices at the BSE logged losses. The Mid-Cap index declined 0.4 percent, and the Small-Cap index ended nearly flat.