IPO Oversubscription Explained: What Happens When Demand Exceeds Supply?

What Does IPO Oversubscription Mean?

An IPO is said to be oversubscribed when the total number of shares applied for in a particular category (or across the whole issue) exceeds the number of shares offered in that category (or across the issue).

For example, if a company offers 10 lakh shares to the public and investors apply for 30 lakh shares the issue is said to be subscribed 3 times (3x).

The calculation is straightforward:

Subscription ratio = Shares applied for ÷ Shares offered

In this instance 30 lakh shares divided by 10 lakh shares is 3x subscription.

A figure of 1x means demand is exactly equal to the number of shares available. A figure below 1x means demand has not fully covered the offer, a figure above 1x means the offer has been oversubscribed.

The total number of subscriptions doesn't tell the whole story. There are different investor types for IPOs and demand can vary significantly across those investor types.

How Does IPO Oversubscription Work?

Imagine an IPO offering 10 lakh shares. By the close of the subscription period the applications received are for 40 lakh shares.

The issue is now subscribed four times.

Particulars	Number of shares
Shares offered	10 lakh
Shares applied for	40 lakh
Subscription ratio	4x

The company can't just issue all 40 lakh shares as the offer document will state how many shares are being offered. Allotment will take place in accordance with the relevant rules and on the basis of allotment.

The process also takes into account the investor category in which the application falls. In a book built public issue there are different allocation arrangements for retail individual investors, non-institutional investors and qualified institutional buyers.

This means an IPO which is subscribed to four times overall could have a very high subscription in one category and quite low demand in another.

What Happens to Retail Investors When an IPO Is Oversubscribed?

Retail investors will often ask whether applying for an IPO in itself guarantees you an allotment. The short answer is no.

Under the relevant allotment regime the result will be determined by the number of eligible applications, the amount of retail shares available and the rules around the issue.

Suppose the IPO has sufficient shares to accommodate 10,000 minimum lot applications in the retail category but there are 50,000 eligible applications competing for those shares. There are more applicants than there are minimum lot allocations.

Allotment may be by computerised draw of lots in such a case, subject to the relevant rules and basis of allotment. Some applicants will be allotted shares and some will not.

That's why applying for a single lot doesn't guarantee you'll get an allotment in a very oversubscribed IPO.

For the investor applying for larger quantities the outcome will vary depending on investor category and the applicable method of allotment. The process should always be checked against the issue documentation rather than assume that the overall subscription multiple will in any way determine an individual's outcome.

Does Applying for More Lots Increase Your Chances?

This is one of the most frequently asked questions by retail IPO applicants.

Applying for more lots doesn't necessarily increase your chances of getting an allotment in a very oversubscribed retail category. If the number of eligible retail applications exceeds the number of available minimum lot allotments then the process in question may result in a successful applicant being awarded a minimum lot rather than giving the larger applications a proportionally better chance.

The rules and method of allocation can vary by investor type and by issue type. Investors should therefore not assume that a larger application will necessarily lead to a greater number of shares.

Before you apply you must check the size of the lot, the amount of application, the investor category limits and the relevant allotment provisions as set out in the offer documents.

Is a Highly Oversubscribed IPO a Good Investment?

Strong subscription numbers can be an indicator of investor interest, but they don't in any way replace the need for research.

Demand can be driven by a range of factors including the company's own business prospects, its valuation, brand, financials, the state of the market and general investor sentiment. Some IPOs will naturally attract interest simply because a similar company has done well in the recent past.

None of these factors in any way guarantees a positive listing or a good long term return.

Before you apply you should look at the company's revenue, profitability, debt, cash flow, business model and risks as set out in its offer documents. It's also worth comparing its valuation with that of the listed peers and understanding how the company intends to use the funds it's raising.

An IPO can be oversubscribed and yet still end up listing below its issue price. Conversely an issue which is less heavily subscribed is by no means a bad investment. Subscription data tells you about demand during the offer period, it doesn't tell you anything about the future performance of the company.

How Can Investors Check IPO Subscription Status?

Investors can track the subscription figures via the stock exchange websites and other authorised market information sources during the course of an IPO. The figures are typically published separately for different categories of investor.

Once the issue is closed the registrar and the relevant stock exchange will publish the basis of allotment. Applicants can then check their individual allotment status via the appropriate official channels.

Investors need to be clear about the difference between the provisional subscription figures during the bidding period and the final figures once the issue has closed. They should also be wary of any unconfirmed rumours or claims that circulate on social media about their chances of getting an allotment.

If an application doesn't get an allotment the blocked amount is typically released in accordance with the relevant ASBA or UPI mandate process. If the funds are still blocked beyond the expected time then applicants should check their bank account or mandate status.

What Should Investors Remember?

IPO oversubscription is simply that demand exceeds the number of shares available. The subscription multiple tells you the level of demand but the actual allotment will be determined by category wise availability, eligible applications and the rules in place.

Before you invest, read the offer document, understand the business and the valuation and consider the risks. Don't just apply because an IPO is in the news or because it's reporting a very high subscription.

Investors can use platforms such as the Ashika Dhanush app to access market-related information and follow investment opportunities, while conducting their own due diligence before making decisions.