Grey Market Premium (GMP) is one of the most discussed metrics in the Indian IPO investing community. While it is unofficial and unregulated, it gives a real-time market sentiment about how an IPO is likely to perform on listing day.
What is GMP?
GMP is the premium at which IPO shares are being traded in the unofficial "grey market" — before the shares are officially listed on the stock exchange. For example, if an IPO has an issue price of ₹100 and a GMP of ₹40, the grey market expects the stock to list around ₹140.
How is GMP Calculated?
| Issue Price | ₹100 |
| GMP | ₹40 |
| Expected Listing Price | ₹140 (Issue Price + GMP) |
| GMP % | 40% gain over issue price |
Why Does GMP Change?
- Subscription levels — higher oversubscription generally pushes GMP up
- Market conditions — overall bull/bear sentiment affects GMP
- Company fundamentals — strong financials attract higher GMP
- Anchor investor response — good anchor book builds confidence
- Listing day approaches — GMP may reduce as listing risk increases
GMP in 2026: Lower Signal Reliability
In the current market environment (April 2026), GMP signals are less reliable than in 2024–25. With overall IPO listing gains averaging just 2–3%, grey market premiums are subdued across most IPOs. The overall GMP sentiment as of April 2026 is described by market participants as "weak" with "very low enthusiasm to trade." Use GMP as one data point, not the primary basis for your decision.
Limitations of GMP
GMP is completely unofficial and unregulated. It is traded by brokers in an unorganised market and can be manipulated. Many IPOs with high GMP have listed below expectations, and vice versa. Always use GMP as one data point, not the sole basis for an investment decision.
Important Disclaimer: GMP does not guarantee the actual listing price. Always do your own research on company fundamentals, financials, and valuations before applying.