For how many days is an IPO open?

In case of an initial public offer (IPO), the issue needs to be opened for at least three working days, but not more than ten working days.

In case of exceptions, such as revision in price band for an IPO made through the book building process, the bidding period disclosed in the red herring prospectus (RHP) needs to be extended for a minimum of three working days, provided the total bidding period does not exceed 10 working days.

The status of bidding in a book-built issue is available on the website of stock exchanges (BSE and NSE) on a consolidated basis. For investors’ ease, the data regarding bids is also available investor category-wise.


After the price has been determined on the basis of bidding, a public advertisement containing the price as well as a table showing the number of securities and the amount payable by an investor, based on the price determined, is issued. However, in case of a fixed price issue, information is available only after the closure of the issue through a public advertisement, issued within 10 days of dispatch of the certificates of allotment/ refund orders.

At present, it takes six days for a stock to get listed on the exchanges after a successful bidding process. The market regulator is in the process of cutting down this period to three days.