Short answer: The grey market is an unofficial, over-the-counter space where shares or IPO applications change hands before the shares are listed on a stock exchange. Grey market premium (GMP) is the extra amount above the issue price that investors will pay for an IPO share before it lists, and it signals demand rather than guaranteeing a listing price.
Last reviewed: 9 November 2026
At a glance
| Term | What it means | Key point |
|---|---|---|
| Grey market | Unofficial, over-the-counter trading before listing | No regulator, and SEBI and exchanges do not supervise it |
| Grey market premium | Amount above issue price that investors pay before listing | Indicates demand, not the actual listing price |
| Kostak rate | Predetermined grey market price for a share | Difference is settled between parties based on listing price |
| Trading allotted shares | Buying and selling IPO shares already allotted, before listing | Settled directly between brokers and investors |
| Trading applications | Buying and selling IPO applications at a premium | Also settled outside the exchange |
How does the grey market work?
Most grey market trades happen before an IPO’s shares start trading on an exchange. Because there is no exchange in the middle, buyers and sellers deal directly, often through brokers, and settle the trade between themselves.
The activity takes two forms. One is buying and selling IPO shares that have already been allotted to an applicant but not yet listed. The other is buying and selling IPO applications themselves, where the application is transferred at a price above its face value.
What does grey market premium indicate?
Grey market premium is the gap between the issue price and the price investors are willing to pay in the grey market before listing. A high premium suggests strong investor interest and an expectation that the share will list above its issue price. A low or negative premium suggests weaker demand.
Hypothetical example (all figures invented for illustration): An IPO has an issue price of ₹100 per share and a GMP of ₹20, so grey market trades take place around ₹120. An investor buys 100 allotted shares at ₹120, paying ₹12,000. If the shares list at ₹115, each share is worth ₹5 less than the amount paid, a loss of ₹500 before any costs. The premium reflected expectations, and the listing price turned out differently.
Why isn’t grey market premium a guarantee?
GMP is an indicator, not a promise. It reflects what some participants are willing to pay before listing, but it does not fix the price at which the share will eventually trade.
The actual listing price also depends on the company’s performance and on overall market conditions. Those factors can change between the time the grey market price is set and the day the shares list, so a high premium can be followed by a lower listing price.
What are the risks of grey market trading?
The grey market has no regulator. SEBI, stock exchanges and brokers do not back or supervise these transactions, so there is little legal recourse if a trade goes wrong.
Settlement is also a concern. Grey market trades are typically settled directly between brokers and investors outside the exchange, which creates higher counterparty risk than regular exchange trading. Counterparty risk means the risk that the other party does not honour its side of the deal, and on an exchange a clearing system stands behind trades; in the grey market, that protection is absent.
What is a kostak rate?
A kostak rate is a predetermined price fixed in the grey market for a share. It lets an investor sell shares at that rate after the IPO, and the difference is settled between the parties depending on the listing price.
The catch is that the outcome depends entirely on the other party honouring the settlement. Since no regulator or exchange supervises the arrangement, the investor carries the risk that the agreement is not met.
How do companies use grey market activity?
Underwriters and issuers watch grey market activity to gauge demand for an IPO. They use it to help estimate the IPO’s valuation.
For a reader, the same signal has limits. It comes from an unofficial market with no supervision, so it shows what some participants are prepared to pay, not what the market will finally decide.
Frequently asked questions
Is grey market premium the same as the listing price?
No. GMP indicates demand before listing, and it does not guarantee the actual listing price, which also depends on company performance and overall market conditions.
Is the grey market regulated?
No. The grey market has no regulator, and SEBI, stock exchanges and brokers do not back or supervise these transactions.
Who settles grey market trades?
Grey market trades are typically settled directly between brokers and investors outside the exchange. This creates higher counterparty risk than regular exchange trading.
What does a negative grey market premium mean?
A low or negative premium suggests weaker investor demand for the IPO share. It does not on its own tell you where the share will list.
Sources and last check
Facts in this article were checked against the sources below on 9 November 2026. Rules and figures can change; check the primary source before acting.
- groww.in (broker education)
- dhan.co (broker education)
- kotakneo.com (broker education)
- icicidirect.com (broker education)
This article is general information, not investment advice. MyFinanceBandhu is not a SEBI-registered investment adviser.