What Is Grey Market Premium (GMP)? Meaning, Risks and Why It Is Not Official

By BillCut
Last updated: 27 October 2026

Grey market premium, or GMP, is an unofficial premium that some people quote for IPO shares before they list. It is not an official figure, and SEBI’s investor guide says not to deal in the grey market. The actual listing price is found by exchange orders on listing day, so GMP can be wrong in either direction.

What is grey market premium?

GMP is the amount over the issue price that unofficial buyers are said to be paying for shares that are not yet listed. Those deals happen outside the stock exchanges. The table below shows how people turn a GMP into a guessed listing price, using illustrative figures.

Item	Illustrative figure	How it is worked out
Issue price	Rs 1,000	Set by the company in the offer document
Quoted GMP	Rs 100	An unofficial quote, not a fact
Guessed listing price	Rs 1,100	Issue price plus GMP
GMP as a percentage	10%	GMP divided by issue price, times 100

A quoted GMP can change daily and is passed along by word of mouth. No exchange or regulator guarantees it.

Is grey market premium official?

No. SEBI’s investor guide on investing in IPOs advises investors not to deal in shares in the black market or grey market. Trades there happen outside the exchanges, so there is no official record and no investor protection.

How is the real listing price decided?

On listing day, IPO shares go through a special pre-open session. According to NSE’s FAQs on the session, only limit orders are accepted, and orders are matched at a single equilibrium price, which is the price at which the maximum volume can trade. That price becomes the open price. If no equilibrium price is found, the shares move to the normal market at the issue price.

Point	Grey market premium	Listing day price
Who sets it	Unregulated dealers and word of mouth	Buy and sell orders on the exchange
Official record	None	Published by the exchange
Investor protection	None	Exchange and SEBI rules apply
Reliable guide	No	Shows what orders actually matched at

Why can GMP mislead you?

The listing price can land above, at or below what GMP suggested. The table below uses the illustrative issue price of Rs 1,000 and a lot of 15 shares to show what different outcomes mean for one lot, which costs Rs 15,000.

Illustrative listing price	Change from issue price	Gain or loss on one lot
Rs 1,100	10% above	Rs 1,500 gain
Rs 1,000	No change	No gain or loss
Rs 900	10% below	Rs 1,500 loss

SEBI’s guide also says not to invest with the anticipation of making quick profits on listing, and to use your own funds. A loan or card balance used for a bid keeps charging interest whatever happens on listing day. If high interest dues are already weighing on your budget, Check your options with BillCut.

What scams come with IPO GMP buzz?

SEBI’s April 2025 press release warns about scamsters who lure people with offers like “IPOs at discounted price” and “sure shot allocation of IPO”. It advises investors to deal only with SEBI registered intermediaries and authentic trading apps. If you lose money to a scam, report it on the National Cyber Crime Reporting Portal or call 1930.

BillCut has covered how finfluencers are being regulated and how to spot fake WhatsApp messages.

What should you do instead of following GMP?

1. Read the offer document before bidding, as SEBI’s guide advises.
2. Bid only with your own funds, never with borrowed money or a card balance.
3. Decide your plan for listing day before it arrives, so a GMP headline does not decide it for you.
4. Deal only through a SEBI registered broker and a genuine app.
5. If you are new to markets, read BillCut’s guide to the basics of the stock market in India.

Frequently asked questions

Disclaimer: This article is for general information only and is not investment or financial advice. It does not quote or endorse any grey market price; all figures are illustrative. Speak to a SEBI registered adviser before investing.