September 2026 has been an unusually brutal series for the Nifty. From the 25 August high of 24,334.55 to the 28 September close of 22,780.25, the index has lost 1,554.30 points, equivalent to roughly 6.39% in just over one expiry cycle. Historical data confirms the 24,334.55 August 25 high and the 22,780.25 September 28 close.
The important question is not simply: “Why did Nifty fall?”
The more interesting question is:
Why has the equity market fallen so aggressively when India’s domestic growth story has not collapsed?
India’s latest official data actually shows real GDP growth of 7.8% in Q1 FY27, not 7%. The 7% number was the RBI’s earlier projection.
That creates an important market contradiction:
Strong GDP + strong industrial activity + large IPO activity + aggressive FII selling + heavy large-cap selling = an index correction that looks much more like a liquidity/portfolio-allocation event than a simple deterioration in domestic economic growth.
1. The 1,554-Point Fall Is the Key Story
The sequence is striking:
25 Aug: 24,334.55
28 Sep: 22,780.25
Fall: 1,554.30 points
Percentage decline: ~6.39%
And the damage has not been confined to one or two sessions.
Nifty has experienced a prolonged sequence of weekly weakness. Reuters reported that by 18 September, Indian equities had already recorded a six-week losing streak, the longest since 2020.
By September 28, Nifty had reached a near six-month low, closing at 22,780.25. All 16 key sectors were lower that session, while financials and banks were among the major sources of pressure.
This is therefore not simply a narrow sector correction.
It has become a broad liquidity and positioning event.
2. The GDP–Nifty Disconnect
This is perhaps the most important observation.
The Indian economy is not showing the type of contraction that would normally explain a 6%+ index decline by itself.
The latest official Q1 FY27 real GDP growth was 7.8%, while Reuters reported that the strength came from investment, manufacturing, services, public expenditure, exports and domestic demand.
Industrial production has also remained strong.
August 2026 IIP growth was reported at 8% YoY, with manufacturing rising 9% and capital-goods output increasing 16.9%.
So we have:
GDP ≈ 7.8%
IIP ≈ 8%
Yet Nifty ≈ -6.4% from the August high
That divergence deserves attention.
It suggests that index price is currently being driven by capital flows, valuation adjustments, global liquidity and large-cap positioning more than by a sudden collapse in domestic growth.
3. IPOs: The Liquidity Rotation Theory
This is where your observation becomes particularly interesting.
September 2026 has witnessed an extraordinary IPO pipeline.
Reports indicate that around 30 mainboard IPOs raised approximately ₹38,785 crore during September, making it one of the busiest IPO months in decades.
More importantly, foreign investors have also been participating in the primary market while selling existing listed shares.
One report found that FPIs had invested ₹8,551 crore in IPOs through September 25, even as they continued selling equities in the secondary market.
Another analysis reported that FIIs had withdrawn approximately ₹2.8 lakh crore from the secondary market during 2026 while investing more than ₹47,000 crore in IPOs.
That distinction is extremely important.
It means:
Money is not necessarily leaving India completely.
It can be moving from the secondary market into the primary market.
That creates a very different market structure.
Instead of:
Foreign money → Indian equities
we may temporarily have:
Foreign money → IPOs / primary market
while simultaneously:
Foreign money → selling existing large-cap holdings
The consequence can be severe for an index such as Nifty because Nifty is heavily influenced by large, liquid companies.
4. Why HDFC Bank and Reliance Matter So Much
Your observation regarding HDFC Bank and Reliance is particularly relevant from an index-structure perspective.
These are not ordinary stocks.
They are major index constituents.
When large institutional investors reduce exposure to heavyweight stocks, the impact is transmitted directly into the index.
HDFC Bank fell 2.30% on September 28, while the broader market was also under significant pressure.
Reuters also specifically identified HDFC Bank, Reliance Industries and ICICI Bank among the major companies declining during the September 28 sell-off.
Therefore, the mechanism can be described as:
FII selling
↓
Large-cap selling
↓
HDFC Bank / Reliance / financial heavyweight weakness
↓
Nifty index impact
↓
Technical breakdown
↓
Stop-loss / leveraged-position liquidation
↓
Further selling
This creates a feedback loop.
5. Is This “Forced Liquidation”?
I would describe it more carefully as a possible forced/accelerated liquidation component, rather than saying the entire 1,554-point decline was definitively forced liquidation.
There is evidence supporting the liquidity argument.
FIIs were net sellers in September, while DIIs were absorbing a substantial portion of the selling. As of September 27, one report put FII September outflows at approximately ₹18,531 crore, against ₹52,617 crore of DII investment.
Another report highlighted approximately ₹21,000 crore of FII selling during September while noting continued interest in IPOs and primary-market opportunities.
That combination is important.
If domestic institutions are buying while foreign investors are selling, the market isn’t experiencing a straightforward “everyone is exiting” event.
It is more accurately characterized as:
A redistribution of ownership and liquidity.
6. But There Is One Important Correction: Crude
There is one part of the thesis that needs updating.
You mentioned “crude below $100.”
That was not the situation around the September 28 close.
On September 28, Brent crude surged above $108/barrel intraday, with Reuters reporting that the rise was associated with renewed Middle East/US-Iran tensions and concerns around disruption to oil supply.
Another Reuters report put Brent’s settlement around $105.28.
So for the current analysis, I would not use crude below $100 as evidence for the September 28 market decline.
Instead, the argument becomes even more interesting:
Nifty was already structurally weak before the latest crude spike, and the renewed crude shock then added another layer of pressure.
7. The Liquidity Picture Is More Complicated Than IPOs
There is another factor worth adding.
The RBI has been actively managing system liquidity.
Reuters reported that the RBI had reduced the banking-system liquidity surplus by approximately 55%, from ₹11.16 trillion to ₹4.92 trillion, through measures including bond sales, FX swaps and rupee-support operations.
And on September 28, Reuters reported that the RBI had completed approximately ₹1 trillion of net debt sales in the financial year, the largest such amount in more than a decade.
So the liquidity equation is not simply:
IPO absorption = market weakness.
It is more like:
IPO fund requirements
- FII secondary-market selling
- RBI liquidity withdrawal
- high global bond yields
- crude shock
- geopolitical risk
= significant pressure on secondary-market liquidity
That is a much stronger framework.
One interesting observation from September’s market action 👇
FII cash-market selling: ₹36,706 Cr 🔻
At the same time, India’s primary market absorbed roughly ₹39,000 Cr through mainboard IPOs + ₹1,500 Cr+ through SME IPOs.
And the ₹22,561 Cr NSE IPO alone accounted for more than half of the mainboard fundraising.
Now look at the rotation:
Secondary Market:
FII → Sell HDFC Bank, Reliance & other large caps
Primary Market:
Capital → IPOs / New Listings
Could the message be this simple?
“Why keep money parked in mature large caps if the primary market offers the possibility of higher returns?”
This may explain part of the September pressure on Nifty.
Not necessarily money leaving India.
Perhaps money changing where it wants to earn returns.
Secondary market → Primary market
8. Why the Fall Feels “Too Large” Relative to GDP
This is the core contradiction.
Imagine two completely different scenarios.
Scenario A — Economic recession
GDP collapses.
Corporate earnings collapse.
Investment falls.
Employment weakens.
Credit contracts.
Nifty falls.
That would be a conventional macro bear-market explanation.
Scenario B — Liquidity/portfolio rotation
GDP remains strong.
Industrial activity remains strong.
Domestic liquidity remains available.
But:
- FIIs sell large caps
- IPOs absorb capital
- global yields rise
- crude rises
- currency weakens
- RBI liquidity conditions tighten
- heavyweight stocks decline
- derivatives positioning unwinds
The index can fall substantially without the underlying economy experiencing an equivalent deterioration.
The current data is more consistent with several elements of Scenario B, although the two mechanisms can coexist.
9. The Most Important Structural Observation
There is a fascinating divergence occurring inside the Indian market.
Secondary market
FII selling
Primary market
Strong IPO participation
Domestic institutions
Buying
Large-cap index
Weakness
Mid/small-cap universe
Relatively more resilient than the headline index at various points
This suggests that capital is not simply disappearing.
It is being reallocated.
That distinction matters enormously when interpreting the September correction.
10. Why Nifty Has Suffered More Than the Economic Data Suggests
Nifty is not a GDP index.
It is a market-cap-weighted equity index.
Therefore, if institutional selling concentrates in heavyweight constituents, the index can experience substantial damage even when India’s broader economy continues to grow.
This is exactly why watching:
HDFC Bank + Reliance + ICICI Bank + other index heavyweights
can sometimes tell us more about the immediate direction of Nifty than GDP growth itself.
The September sell-off has indeed seen financials among the sectors experiencing substantial foreign outflows.
11. The “Forced Liquidation” Hypothesis
I would frame your thesis this way:
September Nifty may be experiencing a liquidity-driven liquidation cycle rather than a pure fundamental-growth breakdown.
The sequence:
24,334.55
↓
Initial distribution
↓
FII selling resumes
↓
Large-cap financials weaken
↓
IPO pipeline absorbs capital
↓
Technical supports break
↓
Leveraged positions get reduced
↓
More institutional selling
↓
Nifty loses additional support
↓
Crude/geopolitical shock adds pressure
↓
22,780.25
This creates the appearance of a market that is falling faster than the domestic economic fundamentals alone would justify.
That does not prove manipulation or a single coordinated liquidation event; it provides a plausible market-microstructure explanation that fits several independently reported flow and liquidity developments.
12. The Bigger Question Going Forward
The critical issue is no longer simply:
“Has Nifty fallen enough?”
The more useful question is:
Where does the selling pressure finally meet genuine institutional demand?
Three things deserve close monitoring:
1. FII selling intensity
If FII selling begins to slow while DIIs continue absorbing supply, the liquidity imbalance could change.
2. IPO absorption
If IPO activity remains exceptionally strong, secondary-market liquidity can continue to face competition.
3. Heavyweight stocks
The behaviour of HDFC Bank, Reliance, ICICI Bank and other major Nifty constituents will be critical for determining whether the index weakness remains broad or begins to stabilize.
September Series in One Sentence
The 1,554-point Nifty decline from 24,334.55 on August 25 to 22,780.25 on September 28 looks difficult to explain through domestic growth deterioration alone; the available data instead points toward a combination of FII secondary-market selling, primary-market/IPO capital allocation, large-cap financial weakness, tighter liquidity conditions and—more recently—higher crude and global risk pressures.
And there is a particularly important contradiction:
India’s economy is still growing strongly, but the index is undergoing a major liquidity and valuation reset.
That is why September 2026 deserves to be studied not merely as a correction, but as a potential case study in the interaction between FII flows, IPO absorption, index concentration and liquidity.