IPO GMP Today 2026 — Live Grey Market Premium

Understanding IPO GMP, Kostak Rate and Subject to Sauda

The Indian IPO grey market is an unofficial, over-the-counter marketplace where investors buy and sell IPO applications and allotted shares before the official listing on NSE or BSE. Although it operates outside the regulatory framework of SEBI and the stock exchanges, the grey market has historically been an important sentiment indicator for retail and HNI investors tracking upcoming IPOs. The three most commonly quoted numbers are the Grey Market Premium (GMP), the Kostak rate, and the Subject to Sauda rate — each capturing a different aspect of investor demand.

What is Grey Market Premium (GMP)?

The GMP is the extra amount, over and above the IPO issue price, that a buyer in the grey market is willing to pay for one share of an upcoming IPO. For example, if an IPO is priced at ₹500 and its GMP is ₹120, grey market buyers are effectively valuing the listed share at ₹620. When GMP rises sharply during the subscription window, it usually signals that demand is outpacing supply — typically driven by strong anchor investor participation, aggressive QIB bidding, or favourable broader-market sentiment. GMP is not calculated using any formula; it is discovered through the order flow of traders, sub-brokers, and HNI networks concentrated in Mumbai, Ahmedabad, Surat, Rajkot, and other regional trading hubs.

Kostak Rate: Buying an IPO Application

The Kostak rate is the fixed amount that a grey market buyer agrees to pay the original IPO applicant for transferring their complete application — irrespective of whether the applicant eventually receives allotment. The term originated in the Mumbai IPO market and is still widely used today. Kostak deals are popular when retail investors are reasonably sure that demand will be high and allotment will be partial. By selling their application for a guaranteed Kostak amount, the applicant locks in a small profit without having to worry about allotment luck or listing day volatility.

Subject to Sauda: Payment on Confirmed Allotment

Subject to Sauda (STS) is the rate at which a grey market buyer agrees to purchase an IPO application conditional on confirmed allotment. Unlike Kostak, no payment is exchanged if allotment does not come through. STS rates are typically 8x to 15x higher than Kostak rates because the buyer is only paying for applications that are certain to convert into listed shares. Retail investors chasing multiple applications via family members often prefer STS deals because the upside is larger, even though the payoff is conditional on allotment.

How to Use GMP Data Responsibly

GMP is a useful leading indicator of listing-day sentiment but it is not a substitute for fundamental analysis. A strong positive GMP can quickly evaporate on the listing day if the broader market is weak, anchor investors decide to offload stock, or the company's valuation looks stretched on post-listing numbers. An experienced IPO investor treats GMP as one signal among many and always reviews the Red Herring Prospectus (RHP), peer valuations, management commentary, and long-term industry tailwinds before subscribing. Use our GMP tracker above along with the subscription status, financials, and company profile pages to build a complete picture before making your decision.

How Frequently is GMP Updated on IPOmarket.in?

We refresh GMP every 15 minutes between 09:00 and 17:00 IST and every 30 minutes at other times, seven days a week, and this page refreshes as soon as each update is saved; the "Updated" column shows when each IPO's figure was last updated. When a new IPO opens, expect GMP activity to intensify on day two and peak during the final hours of subscription on day three — those are usually the most reliable readings of true investor demand. For upcoming IPOs that have not yet opened, early GMP values should be treated as exploratory and are typically set by a handful of grey market dealers testing price discovery.