This came a day after Mallya having to quit top posts at two group companies -- Mangalore Chemicals & Fertilisers Ltd (MCFL) and long-grounded Kingfisher Airlines.
While most analysts have long stopped covering UB stocks due to continuing troubles at various group companies and lack of liquidity, they were also taken by surprise to see a sudden spike of up to 20 per cent in their share prices today.
A few other analysts, however, said that the spike in UB group stocks could be like a 'dead cat bounce', which speculators might use to exit from their long-held positions.
The latest round of problems began last week with the minority shareholders of United Spirits Ltd (USL) trouncing proposed financial dealings of the company with its erstwhile promoter Mallya, who remains its Chairman as of now.
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In another unprecedented setback, Mallya's re-appointment as Managing Director of Kingfisher Airlines has been annulled by the government, while he had to quit on his own from the board of MCFL yesterday.
The problems are expected to grow further as several banks, including state-run SBI, are believed to have written to the boards of various UB group firms that no further loans would be provided to them in the wake of defaults made by Mallya and his group companies.
Notwithstanding the mounting troubles for the group, its holding company UBHL saw its share price surge by 19.80 per cent to close at Rs 23.90 on the BSE.
McDowell Holdings also rose by 19.93 per cent to Rs 34.30, while United Breweries climbed 8.11 per cent to Rs 825.65. United Spirits Ltd gained 7.14 per cent to Rs 2,913.
Trading in shares of two companies -- Kingfisher and UB Engineering -- got suspended yesterday due to their non- compliance to Listing Agreement norms.