The stock jumped 6.91 per cent to settle at Rs 258.55 on BSE. Intra-day, it zoomed 7.31 per cent to Rs 259.55.
On NSE, the stock soared 7 per cent to end at Rs 258.75.
Led by the sharp rally in the stock, ICICI bank's market valuation rose by Rs 9,771.57 crore to Rs 1,50,453.57 crore.
The stock was the top performer among the 30-Sensex and 50-Nifty components.
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"Banks went up as Essar-Rosneft deal gave hopes that similar deals could ease NPA worries," said Anand James, Chief Market Strategist, Geojit BNP Paribas Financial Services Ltd.
Indian banks, especially the state-owned lenders have been grappling with non-performing assets (NPAs) or bad loans.
Gross NPAs of scheduled commercial banks almost doubled to 8.7 per cent of advances in April-June quarter of the current fiscal, compared to 4.6 per cent in March last year, and 7.8 per cent in March 2016, led by public sector banks.
Private sector lenders' bad loans were at 2.8 per cent in June this year as against 2.7 per cent in March 2016 and 2.2 per cent in March 2015.
According to Kotak Institutional Equities, the sale of Essar Group's 'entire' holding in Essar Oil and Vadinar port to Rosneft, Trifugra and UCP will allay the market's concerns about Indian banks' exposure to Essar Group.
"We view the 98 per cent stake sale in Essar Oil and 100 per cent stake in Vadinar port by the Essar Group for a total consideration of Rs 850 billion (all-cash deal) as a very significant event for the Indian banking sector," it said.
As per a report by Motilal Oswal Securities Ltd, "The deal will lead to a gain of Rs 400-450b (pre tax) for EOL's promoters. We believe this would be used to repay debt at Essar Global and infuse capital into the steel and power businesses."
Essar Group Director Prashant Ruia has said: "We plan to utilise proceeds from the stake sale to deleverage the Group and pave the way for strategic consolidation and growth in other businesses.
"Deal will help Essar deleverage almost 50 per cent of its Rs 88,000 crore debt and substantially reduce interest costs.
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