GMP vs subscription: how to read both IPO signals
Updated 26 October 2026 · 5 min read
Grey market premium (GMP) and subscription are the two numbers everyone quotes while an IPO is open, but they measure different things. Subscription is an official count of how many shares investors have bid for, published by the exchanges. GMP is an unofficial price quoted by informal dealers for shares that do not trade yet. One is a record of demand; the other is a rumour about price.
Reading them together can tell you something about market mood and your chances of allotment. Reading either one as a promise of listing gains is where investors go wrong. This guide explains what each signal measures, why QIB and retail subscription mean different things, what to make of it when the two disagree, and the limits of both.
What subscription measures
Subscription is the number of shares bid for divided by the number of shares offered, category by category. If the retail portion has 10 lakh shares and retail investors bid for 80 lakh, retail is subscribed 8 times. The exchanges publish these figures through the bidding days from actual bids, and the final numbers are known once the issue closes. Anchor investor shares are allotted before the issue opens and are not part of these figures.
Subscription is reliable as a record of what happened. It tells you how crowded each category was and therefore how hard it will be to get an allotment. It does not tell you the price at which the shares will list.
What GMP measures
GMP is the premium over the issue price at which some unofficial dealers say they will buy shares before listing. Nobody audits these quotes, sources differ, volumes are small and unrecorded, and SEBI does not recognise the grey market. GMP is an attempt to price listing day sentiment, nothing more. It can be moved by a small number of people.
QIB, NII and retail subscription mean different things
| Category | Who bids | What a high number suggests | Watch out for |
|---|---|---|---|
| QIB | Mutual funds, insurers, banks, foreign portfolio investors | Professional investors who usually research the company want shares at this price | Institutions can be wrong; many bid only on the last day |
| NII (HNI) | Individuals, HUFs, companies bidding above ₹2 lakh | Wealthier investors are keen, often for listing gains | Some bids can be funded with borrowed money in hot issues, which can inflate the figure |
| Retail | Individuals bidding up to ₹2 lakh | Broad public interest | Mainly tells you allotment odds are low; it is not a quality signal |
Category sizes depend on the issue. In a mainboard issue of a profitable company, QIBs get not more than 50%, NIIs at least 15% and retail at least 35%.
Many investors give more weight to QIB subscription than to retail, because institutions have research teams and bid in large size. That is a reasonable view, but it is a sign of professional interest, not proof of value.
When the two signals agree
In a "hot" IPO, heavy subscription across categories and a high GMP often appear together. Strong demand feeds positive chatter, and positive chatter brings in more bids. Neither causes the other, and both can reflect the same market mood. When the overall market falls sharply between closing and listing, both the mood and the GMP can cool quickly even though the subscription numbers are already fixed.
When they disagree
Sometimes the signals point in different directions. Some patterns and possible readings:
- High GMP, weak subscription: grey market enthusiasm is not backed by real bids. The GMP may be thinly traded or pushed up, and it often falls back by listing day.
- Strong QIB subscription, low or falling GMP: institutions want the shares at this price, perhaps for the long term, while short-term traders see little listing pop. The quote may also be reacting to a weak market.
- Huge retail and NII subscription, modest QIB: demand is mostly from individuals looking for a quick gain. Sentiment can turn fast.
- GMP falling steadily through the issue period: sometimes this reflects fading sentiment; sometimes it is noise from a few dealers.
None of these patterns is a rule. They are ways to ask better questions, not answers.
How to read them together
- Look at final subscription, not early-day numbers. Many QIB and NII bids arrive on the last day, so day-one figures say little.
- Check the category breakdown rather than the overall figure. A large overall number can be driven by one category.
- Look at the GMP trend over several days instead of a single quote. Each IPO page here shows GMP as the median of several trackers with a trend chart.
- Compare with the GMP accuracy page, which shows how the last GMP before listing compared with the actual listing gain for past IPOs.
- Then put both aside and read the RHP: business, financials, valuation versus peers and risk factors.
Limits of both signals
- Neither number says anything about the company's long-term business or whether the price is fair.
- Subscription can be inflated in a buoyant market and by leveraged bids, and institutions can misjudge a company.
- GMP is unregulated, differs between sources and can be manipulated.
- Both capture the mood of the moment. The share price after listing day depends on results, the market and many other things.
Frequently asked questions
Which is more reliable, GMP or subscription?
Subscription is official data from the exchanges based on actual bids, so it is reliable as a record of demand. GMP is an unofficial quote with no oversight. Neither predicts the listing price with certainty.
Does high subscription mean a high listing gain?
Not necessarily. Heavy subscription shows strong demand at the issue price, and often goes with a good listing, but the listing price is set in the pre-open session on listing day and depends on many factors.
Why do people focus on QIB subscription?
QIBs are institutions with research teams, so strong QIB demand is read as professional interest in the company at that price. Institutions can still be wrong.
What does it mean if GMP is high but subscription is low?
It usually means the grey market quote is not backed by real demand from investors. Such quotes can be thin or pushed up and may fall before listing.
Does retail subscription affect my chances of allotment?
Yes. If the retail portion is oversubscribed, allotment is a lottery for one lot per applicant, so the higher the retail subscription, the lower the chance for each applicant.