The Indian stock market witnessed a clear divergence in September 2026. While the secondary market, represented by the Sensex and Nifty 50, recorded significant losses, the primary market saw a record breaking boom in IPO activity. This contrast made September a notable month for both listed stocks and new public offerings. On one hand, benchmark indices fell sharply due to foreign investor outflows, rising crude oil prices and higher US Treasury yields. On the other hand, the IPO market recorded its highest volume of mainboard deal launches in nearly 30 years. For investors, September 2026 was a month that required careful attention to both market risk and new opportunities.
Secondary Market Performance in September 2026
The secondary market recorded its weakest September performance since 2018. The decline resulted in significant losses for retail investor wealth, with both major benchmark indices ending the month lower.
Nifty 50 Performance
The Nifty 50 fell by 6.1 percent during September. It closed the month at 22,620.45. This was one of the steepest monthly declines seen in recent years, and it reflected the broad based selling pressure across sectors. The fall was driven by a combination of global and domestic factors that weighed heavily on investor sentiment throughout the month.
BSE Sensex Performance
The BSE Sensex declined by 5.8 percent during the month. It ended September at 72,480.29. Like the Nifty 50, the Sensex also faced sustained selling pressure from foreign institutional investors and other market participants. The decline in both indices showed that the weakness was not limited to any particular segment but was spread across the broader market.
| Index | September 2026 Performance | September Closing Level |
|---|---|---|
| Nifty 50 | -6.1 percent | 22,620.45 |
| BSE Sensex | -5.8 percent | 72,480.29 |
Key Market Headwinds in September
Several factors were highlighted as major pressures on the Indian stock market during September. These factors combined to create a challenging environment for equity investors.
Foreign Institutional Investor Outflows
Foreign Institutional Investors sold Indian equities heavily during the month. FII outflows were reported at around 2.7 billion dollars, or approximately ₹22,600 crore, in September. The final week saw the steepest single day market declines. Heavy selling by foreign investors put significant pressure on large cap stocks and contributed to the overall market weakness.
Rising Brent Crude Prices
Brent crude prices were hovering around 103 to 108 dollars per barrel. The rise in crude prices created pressure on India inflation limits and import bills. Higher crude prices also affected the rupee and increased the cost of transportation and manufacturing, which in turn affected corporate earnings expectations.
Higher US Treasury Yields
US 10 year Treasury yields moved above 5 percent. The rise in yields diverted global money toward dollar assets. When US yields rise, emerging markets like India often see capital outflows as investors prefer safer dollar denominated assets. This added to the selling pressure in the Indian stock market.
Sector Performance
All 16 major sectors recorded losses during September. The IT sector faced the largest decline, falling 11.2 percent. At the same time, some companies moved against the broader market trend. Coal India, Adani Ports and Dr. Reddy Laboratories recorded gains of up to 13 percent. This shows that even in a declining market, some stocks can perform well if they have strong fundamentals or specific positive triggers.
Primary Market Records a Strong September
While the secondary market declined, India primary market experienced a major surge. The primary market recorded its highest volume of mainboard deal launches in nearly 30 years, supported by domestic liquidity. This shows that companies were eager to raise capital despite the weakness in the secondary market.
Total Capital Raised Through IPOs
A total of 34 companies raised more than ₹39,380 crore, equivalent to around 4.1 billion dollars, through mainboard IPOs. September ended with 70 absolute IPO listings and 86 initial launches across Mainboard and SME platforms. This was a record breaking month for the IPO market and reflected strong domestic investor participation.
NSE IPO Becomes a Major September Highlight
The National Stock Exchange IPO accounted for more than 57 percent of the total funds raised during September. This made it the single largest IPO of the month and one of the most significant listings in recent Indian market history.
NSE IPO Details
| Parameter | Details |
|---|---|
| Issue Size | ₹22,561.57 crore |
| Price Band | ₹1,700 to ₹1,785 per equity share |
| BSE Listing Date | September 25, 2026 |
| Listing Price | ₹1,800 |
| Day One High | ₹1,845 |
| Debut Valuation | ₹4,53,000 crore |
The debut valuation placed the exchange operator among the world largest exchange operators, at sixth place. The strong listing performance of the NSE IPO showed that investor appetite for high quality large issues remained strong despite the weakness in the secondary market.
Other Major September IPO Listings
Apart from the NSE IPO, several other companies recorded notable mainboard activity. These included:
- Elevate Campuses
- Rentomojo
- Moneyview
- Kanohar Electricals
These companies recorded substantial mainboard subscriptions during September. The success of these IPOs showed that domestic liquidity was strong enough to support multiple large issues in the same month.
SME IPO Market Activity
The SME segment also saw strong selective demand during the month. A total of 17 SME listings crossed the 100x oversubscription threshold. SME companies such as Robokidz Eduventures and SpectrAA Technology Solutions recorded listing day premiums of 90 to 99 percent. However, the SME market also saw mixed results. 14 issues slipped below their issue prices on debut, showing that demand was not uniform across all offerings. This means that while some SME IPOs performed very well, others struggled to attract investor interest.
September 2026 Market Performance: Key Numbers
| Market Indicator | September 2026 |
|---|---|
| Nifty 50 Decline | 6.1 percent |
| Nifty 50 Closing Level | 22,620.45 |
| Sensex Decline | 5.8 percent |
| Sensex Closing Level | 72,480.29 |
| FII Outflows | 2.7 billion dollars |
| Approximate FII Outflows | ₹22,600 crore |
| Mainboard IPO Companies | 34 |
| Mainboard IPO Capital Raised | ₹39,380 crore |
| IPO Listings | 70 |
| Initial Launches | 86 |
| SME Listings Above 100x Subscription | 17 |
Primary and Secondary Market Divergence
September 2026 showed a clear difference between the performance of listed stocks and the IPO market. The secondary market faced pressure from foreign investor outflows, higher crude prices and rising US Treasury yields. Meanwhile, the primary market recorded strong activity, with companies raising substantial capital through IPOs. The month therefore combined a significant decline in major stock market indices with record level activity in new public offerings. This divergence is important because it shows that even when the secondary market is weak, the primary market can remain active if domestic liquidity is strong and investor appetite for new issues is high.
Conclusion
The Indian stock market in September 2026 recorded a sharp decline in its major benchmark indices, with the Nifty 50 falling 6.1 percent and the Sensex declining 5.8 percent. At the same time, India IPO market experienced a record breaking month. 34 companies raised more than ₹39,380 crore through mainboard IPOs, while the month recorded 70 IPO listings and 86 initial launches across Mainboard and SME platforms. The NSE IPO was a major part of this activity, accounting for more than 57 percent of the total funds raised in September, while selected SME issues also recorded very high subscription levels and listing premiums. For investors, September 2026 was a month that highlighted the importance of balancing risk in the secondary market with opportunities in the primary market.
Frequently Asked Questions
Q1. How did the Indian stock market perform in September 2026?
A1. The Indian stock market recorded significant losses in September 2026, with the Nifty 50 falling 6.1 percent to 22,620.45 and the BSE Sensex declining 5.8 percent to 72,480.29.
Q2. How much did foreign institutional investors sell in September 2026?
A2. Foreign Institutional Investors sold Indian equities worth around 2.7 billion dollars, approximately ₹22,600 crore, during September 2026.
Q3. How many companies raised capital through mainboard IPOs in September 2026?
A3. A total of 34 companies raised more than ₹39,380 crore through mainboard IPOs in September 2026.
Q4. What were the key details of the NSE IPO?
A4. The NSE IPO had an issue size of ₹22,561.57 crore with a price band of ₹1,700 to ₹1,785 per share. It listed on BSE on September 25, 2026 at ₹1,800 with a debut valuation of ₹4,53,000 crore.
Q5. How did the SME IPO market perform in September 2026?
A5. A total of 17 SME listings crossed the 100x oversubscription threshold, with some companies recording listing day premiums of 90 to 99 percent. However, 14 issues slipped below their issue prices on debut, showing mixed demand.