GMP (Grey Market Premium) Explained — What It Tells You and What It Doesn't

# GMP (Grey Market Premium) Explained — What It Tells You and What It Doesn't

Open any IPO-focused website or Telegram channel during an active IPO window and you'll see "GMP: ₹85" or "GMP: -₹20." Grey Market Premium is one of the most widely cited numbers in Indian retail investing — and one of the most misunderstood.

This article explains what GMP actually is, how it's formed, and how much weight you should give it.

What Is GMP?

GMP (Grey Market Premium) is the premium above the IPO issue price at which shares are informally traded in the grey market — before the company lists on the exchange.

Example:

• IPO issue price: ₹300 per share
• GMP: ₹80
• Implied listing expectation: ₹300 + ₹80 = ₹380

GMP represents what grey market dealers think the stock will list at. It is not an exchange price. It is not SEBI-regulated. It is an informal dealer quote — similar to a bookmaker's odds.

How GMP Is Formed

GMP emerges from a network of dealers (typically in Gujarat and Maharashtra, historically) who facilitate informal trades in IPO shares before listing:

Supply side: Retail applicants who have submitted IPO applications sell their "position" to a dealer — the dealer will receive the shares if allotment happens.

Demand side: Investors who couldn't apply (quota exhausted, application deadline missed) or who want to speculate on listing gains buy these positions.

The price at which these informal deals happen becomes the "GMP."

The GMP Ecosystem: Kostak and Subject to Sauda

Kostak rate: The fixed premium a dealer pays per IPO application, regardless of whether allotment happens.

• Applicant applied for ₹14,000 worth of shares
• Dealer pays ₹500 kostak
• If allotment: dealer takes the shares and profits from listing gains
• If no allotment: dealer simply paid ₹500 for nothing

Subject to sauda: A deal where the applicant receives the premium only if they are allotted shares.

• If allotted: applicant sells shares to dealer at agreed price (issue price + premium)
• If not allotted: no transaction, no payment

Both of these are side bets on IPO demand and listing performance. They don't represent actual secondary market share ownership.

Why GMP Can Be Wrong

### 1. Circular Financing Inflates Demand A significant portion of retail IPO demand in India is financed by operators who apply using borrowed names and funds ("IPO financing"). These applications inflate subscription numbers and GMP — but they reflect financial engineering, not genuine retail demand. When these operators exit at listing, they become sellers, suppressing the post-listing price.

### 2. GMP Is Not Price Discovery No actual shares change hands in GMP markets in the way they do in a demat settlement. The "price" is a quote, not a transaction.

### 3. Market Makers Control the Quote A small number of grey market dealers set GMP. They can manipulate the quoted premium to create FOMO among retail investors, attracting more kostak buyers.

### 4. Last-Mile Information Lag GMP is updated infrequently and sometimes hours or days behind actual market sentiment changes.

GMP vs Unlisted Share Price: What's the Difference?

| | GMP | Unlisted Share Price (Polemarch) | |---|---|---| | What it measures | Expected IPO listing premium | Current secondary market value of existing shares | | Settlement | Informal, no demat transfer | Actual demat DIS transfer | | Regulatory oversight | None | Platform KYC; depository-regulated settlement | | Reliability | Directionally useful; magnitude often wrong | Reflects actual settled transactions | | Use case | IPO application decision | Long-term pre-IPO holding |

GMP and unlisted share prices are measuring different things. A high GMP doesn't necessarily mean unlisted shares are correctly priced, and vice versa.

When GMP Is Actually Useful

Despite its flaws, GMP carries some signal:

1. 1Direction of listing: A positive GMP of 30%+ consistently predicts positive listing. A negative GMP usually predicts listing below issue price. The directional accuracy is ~70%.

1. 1Sentiment barometer: A rapidly rising GMP during subscription reflects genuine institutional and retail enthusiasm. A falling GMP during an open subscription window is a warning sign.

1. 1Triangulation: Combined with subscription data (especially QIB subscription), GMP gives a composite sentiment picture.

The Bottom Line

GMP is a rear-view mirror of dealer sentiment, not a forecast. Use it as one weak signal among many. The more important questions before applying to an IPO:

• Is the company profitable or on a credible path to profitability?
• What is the IPO valuation vs. listed peers?
• What is the use of proceeds? (Growth capex vs. promoter OFS)
• What does QIB subscription tell you? (Smart money signal)

*Published by the Polemarch editorial team. Not investment advice.*