By Saurav Mehra How grey market premium predicts an IPO’s listing performance is less impressive than the daily GMP posts suggest: it often points in the right direction, but it’s an unofficial quote, not a forecast. Treat it as a mood gauge. This is general information, not investment advice.
What GMP Is
GMP is the amount by which IPO shares trade above or below the issue price in an informal market before listing.
- The grey market is an unofficial, over-the-counter market run through brokers and dealers
- It isn’t regulated by SEBI and doesn’t run through the exchanges
- GMP = grey market price − issue price
- Expected listing price = issue price + GMP
- Expected listing gain % = (GMP ÷ issue price) × 100
The Arithmetic in Practice
The formula is simple, which is part of its appeal.
- Issue price ₹200 and GMP ₹60: expected listing price ₹260, a gain of about 30%
- Issue price ₹100 and GMP ₹20: expected listing price ₹120, a 20% premium
- Issue price ₹100 and a grey market price of ₹90: a GMP of −₹10, implying a 10% discount
- Calculators usually use the upper end of the price band, so check which one a site assumes
Why GMP Moves
GMP changes constantly because it reflects what a small circle of traders is willing to pay that hour.
- Subscription numbers, especially strong institutional demand
- Broader market mood and global cues
- News about the company or sector
- Trader activity, since the market is thin and a few large players can swing it
- Social media updates every few hours can amplify these swings
How Well It Predicts Listing Day
The honest summary is “direction, not destination,” and even direction isn’t guaranteed.
- A positive GMP often goes with a premium listing, and a negative one often warns of a discount
- One 2026 analysis found GMP implying an average listing gain of about 11%, while actual average gains came in around 6%, roughly half of what GMP promised
- A widely repeated claim puts GMP accuracy at 60–70%, but the figure comes from an unsourced blog, so treat it as a rough guess
- Even when the direction is right, the size of the gain is often overstated
Why It Goes Wrong
Several things can happen between the last GMP quote and the opening trade.
- The listing price comes from the exchange’s pre-open session, set by real orders, not by grey market dealers
- Market conditions can change between bidding and listing
- Supply from allottees selling right at the open can overwhelm buying
- The grey market is thin, illiquid and open to manipulation by large traders
- SME IPO GMP is considered especially unreliable
- Hype indicators don’t always agree with outcomes. VMS TMT, subscribed 102 times, listed 4.4% below its issue price, while PhysicsWallah, subscribed just 1.8 times, listed 33% higher
The Legal Grey Zone
The grey market sits outside the rules that protect exchange investors.
- SEBI doesn’t recognise or settle grey market trades
- There’s no clearing corporation, no exchange arbitration and no SEBI-style investor protection if a counterparty doesn’t pay
- It’s described as a legal grey zone, not explicitly illegal but entirely unregulated
- Fake GMP posts and “guaranteed listing gain” claims circulate on social media. Be sceptical of anyone selling certainty
- Following GMP as a number is different from trading in the grey market, which carries the risks above
A Sensible Way to Use GMP
If you look at it at all, keep it in proportion.
- Read the offer document and judge valuation first, and look at GMP last
- Compare it with category-wise subscription, especially institutional demand
- Discount the headline figure. If the grey market says 30%, don’t plan around 30%
- Don’t borrow money or skip your own checks because GMP looks strong
- Remember that a negative GMP is usually a warning, but a positive one isn’t a promise
FAQs
Q1. What does GMP stand for and what does it show?
It stands for grey market premium, the unofficial price above or below the issue price at which IPO shares trade before listing. It reflects sentiment, not a verified forecast.
Q2. How do I estimate listing price from GMP?
Add the GMP to the issue price. For an IPO priced at ₹400 with a GMP of ₹95, the implied listing price is ₹495, a gain of about 23.75%.
Q3. Is GMP regulated by SEBI?
No. The grey market operates outside SEBI’s jurisdiction and isn’t settled through the exchanges, so there’s no regulatory protection if a deal goes wrong.
Q4. Is a high GMP a guarantee of listing gains?
No. GMP often overstates the gain, and the exchange’s pre-open session sets the actual opening price. A strong GMP can still be followed by a modest listing or a discount.
Q5. Is following GMP the same as trading in the grey market?
No. Reading a GMP figure is passive, while trading in the grey market means dealing in an unregulated space with counterparty risk. This article doesn’t encourage the latter.
Chetan Singh