Grey market premium: what it is and why it misleads

The grey market premium is the extra amount, over the IPO issue price, that some traders are willing to pay for a share before it is officially listed. If the issue price is ₹100 and people are quoting ₹120 in the grey market, the GMP is ₹20, or 20%. If the quote is ₹90, the premium is negative: a discount of ₹10.

The word grey means neither fully legal nor fully illegal. These are private deals between traders, brokers and operators, often arranged by phone or messaging apps. No stock exchange runs the market, and no regulator watches it. The numbers you see in news stories come from dealers who share their quotes, and different sources often show different figures for the same IPO on the same day.

Between the day an IPO closes and the day the shares list, an investor who has been allotted shares cannot sell them on the exchange yet. Some traders strike deals anyway. One side agrees to buy the shares, or the right to the allotment, at a certain price on listing day. Other trades are simply bets on where the share will open, settled in cash on listing day based on the actual listing price.

These deals rest on trust between the parties. They are not recorded on an exchange, there is no clearing house to guarantee payment, and an unhappy buyer or seller cannot rely on a regulator to enforce the deal. Anyone who treats the grey market as a place to trade takes on risks that the regulated market is designed to remove.

Because it is a quick signal of mood. A high positive GMP suggests that traders expect a strong listing, and a low or negative one suggests the opposite. Retail investors use it as a shortcut to decide whether to apply, and news sites report it because readers search for it.

That popularity is also why the number can be shaped. A quoted premium can rise because of genuine demand, or because people with an interest in the issue want to create excitement. A reader of a headline cannot tell the difference.

There are several reasons it is a poor guide. It is unofficial, so there is no audit trail and no single correct number. It changes from hour to hour and can swing sharply in the final days before listing. It reflects the opinion of a small group of traders, not the whole market.

It also says nothing about the quality of the business. A high GMP does not mean a company is well run, fairly priced or likely to do well after the first day. Many IPOs that had a strong premium have listed flat or below the issue price, and some with no premium have listed well. The listing price depends on the day's market mood, the allotment size and how many shares are on offer, not on a forecast from the grey market.

Finally, a listing gain is only the first day. An investor who applies for a short-lived gain is speculating, and an investor who plans to hold needs to judge the company's growth, profit and valuation over years.

The offer document is the starting point. It shows the company's revenue, profit or loss, debt, risks and how the money raised will be used. The key numbers to read are growth in revenue, whether the company makes a profit or burns cash, and the valuation compared with similar listed businesses.

Another reason for caution is timing. The premium is quoted before the price band is final in some cases, before allotment is known, and before the market has seen the actual listing-day mood. By the time the shares list, a major index move, a global sell-off or news about the company can change the picture completely. A quote taken days earlier cannot account for that. Treat the number as a snapshot of talk among a few traders on one day, and never borrow money to apply because of it.

The subscription numbers published by the exchanges during the issue are also a better demand signal than the GMP. They show how many times the issue was subscribed in each category, such as retail, non-institutional and qualified institutional buyers. Who the anchor investors are can also tell you something, as covered in our anchor investors guide. None of these is a guarantee either, but they are public, official and open to checking.

Deals in unlisted IPO shares outside the exchange fall outside the regulated market. SEBI, the market regulator, does not recognise the grey market, and such deals are not covered by the investor protection that applies to exchange trades. Treat anything you read about the grey market as information about sentiment, and do not treat it as advice or as a safe way to trade. This guide is general information and not investment or legal advice, so check with a registered adviser if you are unsure.