What is GMP (Grey Market Premium)?
GMP is an unofficial price quoted in an informal market before a share lists. It is widely watched, entirely unregulated, and frequently wrong.
The short definition
Grey market premium (GMP) is the extra amount, per share, that buyers in an informal off-market are willing to pay above an IPO's issue price before the share actually lists on NSE or BSE.
If an IPO's price band tops out at ₹100 and the GMP is ₹30, the grey market is implying a listing price near ₹130. That implication is exactly why people watch it — it looks like a forecast of listing gains.
Where the number actually comes from
This is the part most explanations skip. There is no exchange, no clearing house, and no regulator behind GMP. Nobody publishes it officially because there is no official body recording it.
The figures circulating online originate with a small number of dealers who trade unlisted shares and IPO applications informally, mostly in a handful of trading hubs. Websites collect quotes from their own contacts among those dealers and publish an estimate. Different sites often show different numbers for the same IPO on the same day, which tells you something about the precision on offer.
So when you read a GMP figure, you are reading one publisher's summary of what a few private dealers said. It is a sentiment indicator, not a market price.
Why it is often wrong
Grey market volumes are tiny compared with the actual issue. A handful of trades can move the quoted premium substantially, which makes it easy to influence and easy to misread.
It also reacts to the same news everyone else sees, then gets treated as independent confirmation of it — a feedback loop rather than a signal. A rising GMP attracts applications, and heavy subscription is then cited as justification for the GMP.
Most importantly, GMP is a snapshot of sentiment days before listing. Broad market moves between the close of the issue and listing day routinely overwhelm it.
Is trading in the grey market legal?
Grey market transactions sit outside SEBI's regulatory perimeter. They are settled on trust between the parties, with no clearing guarantee, no investor protection, and no legal recourse if the other side defaults.
Reading a published GMP figure, as you are doing here, carries no such exposure. Participating in grey market trades is an entirely different proposition and one where you have none of the protections that apply on a recognised exchange.
How to use it sensibly
Treat GMP as one weak input among several, not as a price target. Subscription figures — particularly whether institutional investors showed up — are published by the exchanges and are verifiable, which GMP is not.
If a decision would change based on a number nobody is accountable for, that is a good sign the number is carrying more weight than it can bear.
Common questions
Is GMP officially published by SEBI, NSE or BSE?
No. No regulator or exchange records, audits or publishes grey market premium. Every figure you see online is an estimate compiled from informal dealer quotes.
Does a high GMP guarantee listing gains?
No. GMP reflects sentiment in a thin, unregulated market days before listing. Broad market movement between the issue closing and listing day frequently overrides it, and shares have listed below issue price despite a strong GMP.
Why do different websites show different GMP figures?
Because each site compiles its own estimate from its own dealer contacts. There is no single source to agree with, so discrepancies between publishers are normal.
Keep reading
- What is a DRHP and an RHP?
The DRHP is a company's draft filing with SEBI; the RHP is the final version carrying the price band. Both are public and free.
- How IPO allotment works
When an IPO is oversubscribed, retail allotment becomes a lottery for one lot each. Applying for more does not improve your odds.
- How to apply for an IPO in India
You need a demat account and either a bank ASBA facility or a UPI ID. Money is blocked, not debited, until allotment.