Bulls were back in action as the benchmark Nifty 50 index surpassed the 26,000 level during the session, helped by supportive global cues and broad-based buying on October 27, to take the index higher by 0.6 percent, recouping Friday's losses.

After opening higher, Sensex and Nifty extended gains on hopes of further rate cut by the US Fed and a growing confidence over a potential US-China trade in the offing.

At close, the Sensex was up 566.96 points or 0.67 percent at 84,778.84, and the Nifty was up 170.9 points or 0.66 percent at 25,966.05, while the BSE Midcap index added 0.7 percent and smallcap index rose by 0.5 percent.

SBI Life Insurance, Bharti Airtel, Reliance Industries, SBI, Eternal were among top gainers on Nifty 50, while losers included Bharat Electronics, Kotak Mahindra Bank, Infosys, Adani Ports and Bajaj Finance.

Except media and pharma, all other sectoral indices ended in the green with metal, PSU Bank, oil & gas, realty index up 1-2 percent.

In stock-specific action, Kotak Mahindra Bank fell 1.5 percent after Q2 profit fall, Coforge shares added 4 percent on profit growth, SBI Life's shares gained 3 percent, Zen Technologies shares shed 4 percent on weak Q2 earnings, while GPT Infraprojects added 6 percent on bagging order worth Rs 195 crore.

Sigachi Industries shares slipped nearly 3 percent after profit drop, while Vodafone Idea shares ended 4 percent higher after SC allowed Centre to reconsider the AGR issue. RIL shares rose 2 percent as Facebook picked up stake in the AI venture, while MCX shares rose more than 3 percent on launching options contract on bullion index MCX BULLDEX.

More than 180 stocks touched their 52-week high on the BSE, including eClerx Services, HBL Engineering, SBI Life Insurance, CreditAccess Grameen, Federal Bank, Bank of India, Bharti Airtel, Cummins India, Laurus Labs, Shriram Finance, SBI, Hindalco Industries, Motilal Oswal, Chola Invest, Tata Steel, Amber Enterprises, Asahi India, Sammaan Capital, among others.