Something unusual is happening in the IPO grey market this week: the GMP on nearly every live mainboard issue has been falling at the same time. Not one weak IPO — five different companies, five different sectors, all sliding together. Here's the actual data pulled from our own tracker, and what's likely behind it.
The numbers, side by side
- NSE: ₹218 (12%) on Sep 14 → ₹208 (12%) Sep 15 → ₹160 (9%) Sep 16 → ₹125 (7%) Sep 17. That's a 43% fall in absolute GMP over three days, on India's most closely watched mainboard listing of the year.
- SS Retail: peaked at ₹143 (34%) on Sep 15, then fell to ₹103 (24%) on Sep 16 and ₹80 (19%) on Sep 17 — down 44% from its own peak in just two days.
- Hero Motors: ₹24 (29%) Sep 14 → ₹23 (27%) Sep 15 → ₹9 (11%) Sep 16, a sharp one-day crash, before a partial bounce to ₹13 (15%) on Sep 17.
- Jindal Supreme: ₹27 (29%) Sep 14 → ₹27 (29%) Sep 15 → ₹25 (27%) Sep 16 → ₹25 (27%) Sep 17. Only a mild pullback — the most resilient of the five.
- Manika Plastech (now closed, awaiting listing): the clearest case of all. It peaked at ₹19 (44%) on Sep 8, then declined on 7 of the following 9 days, down to just ₹2 (5%) by Sep 17.
Why GMP is falling right now
Grey market premium is ultimately a bet on demand at listing — and demand tracks broader risk appetite. This week's backdrop has been genuinely rough for that appetite: Brent crude has been trading near a 4-month high around $108 a barrel on escalating US-Iran tensions, the US 10-year Treasury yield touched 5.04% (its highest level since July 2007), and the market spent the week bracing for a Fed decision that traders were pricing at roughly 91% odds of a hike rather than a cut. All three feed the same story — tighter global liquidity and higher risk-free returns elsewhere make investors less willing to pay up for speculative, pre-listing bets on Indian IPOs.
That's the macro pressure. It doesn't explain everything — Jindal Supreme barely moved while NSE and Manika Plastech nearly halved — but it's the shared current running underneath all five.
We covered the oil, yield, and Fed backdrop in more detail — with sources — in our Sensex five-week-decline piece.
Manika Plastech: the clearest single case study
No other IPO in this group shows as clean a decline. From a 44% GMP peak on Sep 8 to 5% by Sep 17 — a near-total unwind over nine days, with the bidding window itself now closed. Anyone who applied near the peak, expecting a 44%+ listing pop, is now looking at a very different grey-market signal heading into listing day.
Is a falling GMP always bad news?
Not necessarily. A falling GMP mainly signals cooling demand expectations — it doesn't retroactively change subscription numbers or fundamentals, and GMP is an unregulated, informal indicator that can swing on sentiment alone. But it is a real-time read on how the market is pricing near-term listing-day risk, and a multi-day decline across several unrelated IPOs at once — as opposed to one company's isolated bad news — points to a broad shift in appetite rather than a company-specific problem.
Track live GMP for all of these, updated daily, on our IPO GMP tracker.
Frequently Asked Questions
Why did NSE's IPO GMP fall this week?
NSE's GMP fell from ₹218 (12%) on September 14 to ₹125 (7%) by September 17 — a 43% drop in three days. This coincided with a broader risk-off week across markets: Brent crude near a 4-month high, US 10-year Treasury yields at 5.04% (highest since 2007), and a Fed decision the market was pricing as a likely rate hike, all of which tend to reduce demand for speculative, pre-listing bets.
What is causing IPO GMP to fall across multiple IPOs at once?
When several unrelated IPOs see GMP decline together, it usually points to a macro or sentiment-driven cause rather than company-specific news. This week's decline lines up with rising crude oil prices, rising US bond yields, and a hawkish Fed rate decision — all of which reduce risk appetite broadly, including for grey-market IPO bets.
Is Manika Plastech's falling GMP a red flag before listing?
Manika Plastech's GMP fell from a 44% peak on September 8 to just 5% by September 17, the bidding window already closed. It's a real signal that grey-market demand cooled sharply from its peak, but GMP is an informal, unregulated indicator — it reflects sentiment, not a change in the company's actual subscription numbers or fundamentals.
Disclaimer: This article is for informational and educational purposes only and does not constitute financial or investment advice. IPOLyst is not a SEBI-registered investment advisor. GMP is an unofficial, unregulated indicator and can change daily. Please conduct your own research or consult a registered advisor before investing.