Initially, the issue was to close today.
"The issue has been extended by two days so that bank strike does not impact retail investment. Retail investors usually invest through banks and this extension would provide them more window to invest in EIL," a senior official said.
Demanding higher wages, employees of PSU banks have gone on a two-day strike beginning today.
Government is selling over 3.36 crore shares or 10 per cent of its stake in EIL through a Follow on public offer (FPO) and the price band is Rs 145-150 apiece.
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At the upper end of price band, the share sale would fetch Rs 500 crore to the exchequer.
As much as 35 per cent of the issue size is reserved for retail investors and so far they have put in bids for 70 per cent of the shares reserved for them, the official said.
The qualified institutional investors portion was subscribed more than 2.26 times.
The government, which currently holds 80.4 per cent in the miniratna company, had divested a 10 per cent stake in 2010.
A discount of Rs 6 per share would be offered to retail investors and employees participating in the offer. Five per cent of the offer has been reserved for EIL employees.
The stake sale is being managed by ICICI Securities, IDFC and Kotak Mahindra Capital, Edelweiss Financial Services and IDBI Capital.
This is the second disinvestment through a follow-on offer in the current financial year. In December, government sold 4 per cent in Power Grid Corporation of India, which fetched the exchequer over Rs 1,600 crore.