📊 What is GMP in IPO?
Grey Market Premium explained in plain English — for first-time retail investors..
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Grey Market Premium (GMP) — The Simplest Explanation
Before a company's shares list on BSE or NSE, traders buy and sell them informally in what's called the "grey market". The extra price they're willing to pay above the IPO issue price is called the Grey Market Premium (GMP). It is an unofficial, unregulated number — but one that every IPO investor watches closely.
🔷 What Exactly is GMP?
The 30-Second Explanation
When a company announces an IPO with a price band of, say, ₹100–₹110, the shares don't start trading on the stock exchange immediately. There's usually a gap of 6–8 days between the IPO closing and the listing date.
During this gap, some traders in unofficial markets start buying and selling these shares. If they're willing to pay ₹130 for a share that will issue at ₹110 — the extra ₹20 is the GMP (Grey Market Premium). This tells us they expect the share to list above ₹110.
💡 Real-World Example (IRCTC Listing Date - Dec 2019)
Example Calculation
| Issue Price (Upper Band) | ₹320 per share |
| GMP (Grey Market Premium) | +₹250 per share |
| Estimated Listing Price | ₹570 per share |
| Premium % | +78% (Estimated based on GMP) |
| Lot Size | 400 Shares |
| Actual Listing Price | Rs. 644 per share |
| Listing Gain per lot | ₹12,960 (As listed at Rs. 644 per share i.e. 101% ) |
⚠️ Important: GMP is an unofficial estimate. IRCTC may or may not have list at ₹570 (IPO Price + GMP). The actual listing price is decided by real buyers and sellers on listing day. Always check the company's fundamentals before applying.
🔴🟢 Positive GMP vs Negative GMP
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Positive GMP Good Sign
Grey market traders are willing to pay MORE than the issue price. This usually means strong demand. Example: Issue ₹110, GMP +₹22 → Expected listing ₹132 (+20%).
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Negative GMP Caution
Traders expect the stock to list BELOW issue price. Example: Issue ₹808, GMP -₹32 → Expected listing ₹776. Weak demand or over-priced IPO. Consider avoiding.
📋 Related Terms: Kostak Rate & Subject to Sauda
Kostak Rate
This is the fixed amount a buyer pays you for your entire IPO application — regardless of whether you get allotment or not. Think of it as "selling your lottery ticket before the draw."
Kostak Example
| You applied for 1 lot at ₹138 (1000 shares) | ₹1,38,000 blocked |
| A grey market buyer offers Kostak | ₹3,000 fixed |
| You sell your application | You get ₹3,000 |
| Whether you get allotment or not | You keep ₹3,000 |
Subject to Sauda
Similar to Kostak, but you only get paid if you receive allotment. Higher amount than Kostak, but riskier because if you don't get allotment, the deal is cancelled.
📊 GMP vs Kostak vs Subject to Sauda — Quick Comparison
| Feature | GMP | Kostak | Subject to Sauda |
|---|
| What it measures | Per-share expected gain | Per-application fixed pay | Per-application if allotted |
| Paid even if no allotment? | N/A | ✅ Yes | ❌ No |
| Amount (typically) | ₹5–₹200 per share | ₹1,000–₹20,000 | ₹5,000–₹50,000+ |
| Risk for seller | Low | Very Low | Medium |
| Risk for buyer | Medium | Medium | Low |
| SEBI regulated? | ❌ No | ❌ No | ❌ No |
🎯 How Should YOU Use GMP?
- Use GMP as a sentiment indicator, not a guarantee. It tells you what the market thinks, not what will happen.
- A GMP above 20–25% generally signals strong interest. Many retail investors look for this threshold before applying for listing gains.
- Compare GMP with subscription data — a 50x QIB subscription + high GMP is a very bullish combination.
- GMP can change overnight. Market crashes, bad news, or sector sell-offs can erase a high GMP instantly.
- Never apply to an IPO only because of GMP. Always check the company's revenue, profits, debt and why they are raising money.
- GMP trading in grey market is not SEBI-regulated. If something goes wrong, you have no legal protection.
❓ Frequently Asked Questions
Where do I find GMP data?
IPO Route tracks GMP for all current and upcoming IPOs on our homepage. Note that GMP numbers may differ slightly between sources as they're collected informally.
Is GMP always accurate?
No. GMP has been wrong many times. A high GMP stock can list flat or even below issue price. And stocks with no GMP have sometimes listed at big premiums. Use it as one data point among many.
Why does GMP change every day?
GMP reacts to: subscription levels (more oversubscription → higher GMP), market conditions (Sensex up/down), company-specific news, sector trends, and overall IPO demand. It's like a live temperature gauge of investor sentiment.
Can I profit by selling my IPO application at Kostak?
Yes, but it is in the grey market and not regulated. If the stock lists at a big premium, you will miss those gains. If the stock lists at a loss, you've protected yourself. It's a tradeoff. Most retail investors are better off just selling on listing day through their broker normally.
What does "No GMP" mean on IPO Route?
It means no grey market activity has been tracked for that IPO yet. This is common for smaller SME IPOs or IPOs that open many days in the future. It does not mean the IPO is bad — just that there's no grey market data available.
📊 Track Live GMP on IPO Route
We update GMP for all current Mainboard and SME IPOs daily. Check our homepage for the latest data.
View Live GMP →
What is an IPO? →
Disclaimer: IPO Route is an informational website. GMP data is sourced from unofficial grey market participants and may not be accurate. We are not SEBI-registered investment advisors. Do not make investment decisions based solely on GMP. Always read the Red Herring Prospectus (RHP) and consult a qualified financial advisor.