"It has been deferred," Oil Minister M Veerappa Moily told reporters after the meeting of the Empowered Group of Ministers in New Delhi.
While Moily refused to elaborate on the reasons for the deferment, sources said his ministry had raised concerns over pricing of IOC shares.
The EGoM may again meet next week, they said.
The Finance Ministry is aiming to garner Rs 4,500 crore (Rs 45 billion) by selling 10 per cent (19.16 crore shares) of the government stake in the oil major.
At today's closing price of Rs 198.95 on BSE, IOC has a market capitalisation of about Rs 48,000 crore (Rs 480 billion). This m-cap is after factoring in IOC's 7.69 per cent holding in Oil and Natural Gas Corporation worth Rs 17,9711.78 crore (Rs 1,797.11 billion)
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