What is IPO GMP (Grey Market Premium)?
IPO GMP stands for Grey Market Premium. It is the extra amount that buyers in the unofficial market are willing to pay for IPO shares before the stock lists on NSE or BSE.
Here is a simple example. If an IPO has an issue price of Rs 200 and the current GMP is Rs 50, then buyers in the grey market are paying around Rs 250 per share. That Rs 50 difference is the GMP.
A positive GMP means demand in the grey market is higher than the issue price. A negative GMP means the stock is expected to list below the issue price. A zero GMP means there is no grey market activity yet or the market is neutral.
GMP is not set by any exchange. It is not regulated by SEBI. It changes every day based on how many people want to buy or sell IPO shares before listing. For active IPOs, GMP can change multiple times in a single day.
How to Read the IPO GMP Table
GMP in Rs: This is the current grey market premium per share in rupees. If GMP is Rs 40 on an IPO with issue price Rs 200, it means the grey market is valuing the share at Rs 240.
GMP %: This shows the GMP as a percentage of the issue price. Formula: (GMP divided by issue price) multiplied by 100. A GMP of Rs 40 on a Rs 200 issue price = 20% GMP.
Estimated Profit: Expected profit per lot based on current GMP multiplied by lot size. For SME IPOs, minimum application is 2 lots, so profit is calculated accordingly.
Lot Size: Number of shares in one lot. For mainboard IPOs, you apply for 1 lot minimum. For SME IPOs, the minimum is 2 lots. Your minimum investment = Issue Price x Lot Size (x2 for SME).
Close Date: The last day you can apply for the IPO. GMP typically moves the most in the 2 to 3 days before the close date, especially on the last day when QIB and HNI bids come in.
Status: Ongoing means the IPO is open for subscription right now. Upcoming means it has not opened yet. Closed means the subscription window has ended but the stock has not listed yet.
How IPO GMP is Calculated
Nobody officially calculates GMP. It is set by supply and demand in the grey market between buyers and sellers who want to trade IPO shares or applications before listing.
The two numbers we show on this page are calculated like this:
Expected Listing Price = Issue Price + GMP
GMP % = (GMP / Issue Price) x 100
Estimated profit per lot = GMP x Lot Size
For SME IPOs, the minimum application is 2 lots, so multiply by 2.
Example: An SME IPO with issue price Rs 100, GMP Rs 30, lot size 1,600 shares. Expected listing price = Rs 130. GMP % = 30%. Estimated profit for minimum application (2 lots) = Rs 30 x 3,200 shares = Rs 96,000.
This is an estimate. Actual listing price can be higher or lower than GMP suggests.
Best Time to Check IPO GMP Each Day
We update this page every morning between 8 AM and 9 AM IST. This covers overnight grey market activity and early morning quotes from grey market traders.
Here is when GMP is most important to check:
2 to 3 days before IPO close date: This is when GMP starts moving more actively. Retail investors are making final decisions on whether to apply.
Last day of subscription (after 2 PM): QIB and HNI bids mostly come in on the last day. As subscription numbers rise, GMP often moves up. Sometimes it drops if the company looked overvalued.
After allotment: GMP often changes after allotment results are out. If allotment chances are low (too many applicants), GMP tends to go up. If allotment was easy, GMP can come down.
Morning of listing day: GMP from the previous night is the last unofficial signal before the stock opens on NSE or BSE.
Bookmark this page and check it every morning during active IPO periods.
Mainboard IPO GMP vs SME IPO GMP - Key Differences
| Factor | Mainboard IPO | SME IPO |
|---|---|---|
| Minimum lots to apply | 1 lot | 2 lots |
| Typical GMP range | 5% to 40% | 10% to 80% or higher |
| GMP reliability | Moderate to good | More volatile |
| Liquidity after listing | Higher | Lower |
| Grey market activity | Starts 1 to 2 weeks before open | Can start earlier for popular IPOs |
SME IPOs often show higher GMP percentages because the issue sizes are smaller and demand from HNIs can push up grey market prices quickly. However, SME GMP is also more likely to be inaccurate. A high SME GMP does not always result in a strong listing.
For mainboard IPOs, GMP tends to be more stable and slightly more reliable as a listing indicator, though it is still not guaranteed.
How to Use IPO GMP to Make Better Decisions
GMP is a useful signal. It is not a guarantee.
Here is how to use it correctly:
Check GMP along with subscription numbers. If GMP is high but retail subscription is low, be careful. If GMP is moderate but QIB subscription is strong, that is usually a better sign.
Check GMP trend over multiple days. A GMP that is rising steadily from Rs 10 to Rs 40 over 5 days is more reliable than a GMP that jumped from Rs 5 to Rs 40 overnight.
Compare GMP % with the company's PE ratio. If GMP suggests a 60% listing gain but the company is already priced at a high PE ratio compared to peers, the grey market may be wrong.
Use GMP for short term signals only. GMP reflects listing day expectations. It says nothing about the company's performance 6 months after listing. Do not use GMP to make long term investment decisions.
Do not apply to an IPO based only on GMP. Read the company review, check the financials, look at the promoter background. GMP gives you market sentiment. Fundamentals give you a view on actual value.
Why IPO GMP Can Be Wrong
GMP has been wrong many times. There are a few reasons this happens.
Grey market traders work on limited information and sentiment, not detailed research. When a popular brand name IPO opens, grey market buyers can push GMP very high even if the company financials are weak.
On the last day of subscription, large QIB and HNI bids can flood in at once. This changes the subscription numbers quickly. Grey market traders react to this, and GMP can swing sharply in a few hours.
After allotment, if the market mood turns negative (a bad day on Sensex or Nifty), the stock can list well below GMP even if GMP was strong.
SME IPOs with smaller issue sizes are especially easy to manipulate in the grey market. A few large buyers can push up GMP artificially.
The most honest thing we can say: GMP is right more often than it is wrong for high demand mainboard IPOs. For SME IPOs and for stocks with weak fundamentals, GMP has a poor record.
How to Check GMP History for a Specific IPO
Every IPO page on IPOwiz shows the full GMP history from the day grey market activity starts until the listing date. You can see day by day GMP movement and compare it to the final listing price.
This is useful because you can see how accurate GMP was for past IPOs in the same sector or of a similar size. If you are tracking a pharma IPO, you can look at GMP accuracy for the last 5 pharma IPOs on our platform.
To check GMP history, click on any IPO name in the table above. The individual IPO page shows the full GMP log, subscription data by day, allotment details, and listing outcome.