Grey market premium
Why IPO GMP Can Be Unreliable
The structural reasons grey market premium is a weak predictor of listing price — thin trading, no disclosure, conflicts of interest and fast-changing sentiment.
By Niva Market Watch Editorial · Published
Grey market premium is widely followed, but it has structural weaknesses that make it a poor guide to what an IPO will list at. This guide sets out those weaknesses so that a GMP figure can be read for what it is: an informal, fast-moving quote.
1. There is no transparent market behind it
An exchange price comes from thousands of orders matched in public, with every trade recorded. A GMP figure comes from a small number of dealers quoting prices to each other and to applicants. Nobody publishes how many deals were done, at what size, or whether they were done at all. A quote is not a trade.
2. It is easy to influence
Because the market is thin and unrecorded, a few participants can move the quoted premium. People who stand to gain from strong demand for an issue — or who have bought applications and want to sell — have an incentive for GMP to look high. There is no regulator checking.
3. It changes quickly
GMP can move several times a day, especially in the last days before listing, in response to subscription numbers, market mood and news. A figure a few hours old may already be out of date, and two websites can show different numbers for the same issue at the same time. This is why we show the date of every reading.
4. It is formed before listing-day conditions are known
The listing price is discovered on the exchange on listing morning — see how the listing price is determined. If the broader market falls sharply between the last GMP quote and listing, or if many allottees decide to sell at once, the opening price can land far from the GMP.
5. The grey market and the exchange have different participants
Grey market dealers are a small, specific group. The listing price is set by all market participants — institutions, allottees, traders and new buyers. Their views can differ sharply from the dealers'.
6. Grey market deals have their own risks
Deals are unregulated and rest on trust. A dealer who has quoted a price, or agreed a kostak or subject-to-sauda deal, may not honour it if the market turns. There is no investor protection, which is another reason the quoted premium can differ from what happens. See what GMP is.
What GMP can and cannot tell you
| Can suggest | Cannot tell you |
|---|---|
| The general mood among grey-market dealers at a point in time | The listing price |
| How that mood has changed over recent days (if readings are dated) | Whether the company is a sound business or fairly priced |
| Your chance of allotment | |
| What the share will be worth after listing day |
More reliable things to read
- The offer document — business, financials, objects of the issue and risk factors: DRHP vs RHP.
- Subscription by category, which is published by the exchanges: how subscription works.
- A structured comparison with listed peers: how to compare IPOs objectively.
Related guides
What Is IPO GMP (Grey Market Premium)?
What IPO grey market premium means, how GMP, kostak and subject-to-sauda rates are quoted, and why GMP is unofficial and unregulated.
Allotment, refunds & listingHow the IPO Listing Price Is Determined (and Listing Gains or Losses)
How the pre-open call auction on listing day discovers the opening price, why it can differ from the issue price and GMP, and how listing gains or losses are calculated.
Comparing IPOsHow to Compare IPOs Objectively
A structured, non-promotional checklist for comparing IPOs: business, use of proceeds, financial quality, valuation versus listed peers, issue structure and risks.