Mumbai, Jan. 27 -- The key equity benchmarks ended modestly higher in a volatile session, supported by improving risk appetite. Sentiment was lifted by optimism around the India-European Union free trade agreement and expectations of a potential easing of US tariff measures related to India's imports of Russian oil. The rupee rebounded from record lows, providing additional support to domestic equities, while firm global market cues aided sentiment. Investors also took note of remarks at Davos by US Treasury Secretary Scott Bessent, who indicated that the additional 25% tariffs on India could be withdrawn amid reduced Indian purchases of Russian oil. Separately, liquidity support from the Reserve Bank of India boosted confidence after the...