Why NSE Has to List on BSE: The Conflicts Behind India's Biggest IPO

India's National Stock Exchange has wanted to go public for more than ten years. The co-location case cost it years. SEBI issued the No Objection Certificate on 30 January 2026, and the board signed off a week later. Even so, the NSE listing on BSE stays awkward. The reasons are built into how the exchange works.

The size draws the eye. The draft red herring paper runs to 614 pages. The offer covers 14.89 crore shares, close to 6% of NSE, worth about ₹30,000 crore. That would top Hyundai Motor India's ₹27,859 crore deal and rank as India's largest IPO. It is also a pure offer for sale. NSE itself raises nothing.

The exchange that cannot list on itself

Start with the simplest snag. NSE may not list its own shares on its own platform.

Rule 45 of SEBI's SECC Regulations, 2018 blocks self-listing. The logic is easy. NSE runs trading, market watch and listing rules. If it listed itself, it would referee its own game.

So NSE goes to BSE. This has happened before. When BSE went public in 2017, it listed on NSE for the same reason. Once NSE lists, the two swap places: BSE listed on NSE, NSE listed on BSE.

The workaround NSE is weighing

NSE does not want its shares trading only on BSE. Reports in August 2026 said it is eyeing the "Permitted to Trade" route. The tool is an old one. A stock listed on one exchange can be cleared to trade on a second one, with no fresh listing.

About 250 firms already trade on NSE this way. Goodyear India, Novartis India and Elantas Beck India are among them. They stay listed on their main exchange and keep their usual duties. Trading is still watched in full. News of the plan pushed BSE shares lower, which shows what is at stake.

The Nifty problem

There is a sharper reason NSE wants this. It is index entry.

For years a stock had to be listed and traded on NSE to join a Nifty index. That rule would have locked NSE out of its own index for good. NSE Indices changed it in August 2019. Permitted to Trade stocks now qualify, if they clear the size, liquidity and free float tests.

So NSE could join the Nifty 50 one day. Index funds and ETFs track that basket, so entry would force a wave of buying. Here is the snag. NSE owns NSE Indices, the firm that runs the Nifty. The exchange could join an index built by its own arm.

One product carries the business

Set the structure aside and a plainer risk shows up. NSE leans hard on one product.

Options alone brought in 60.22% of its FY26 operating revenue. All derivatives together made up about 69.14%. Trading services made up 78.65% of revenue. And the top ten brokers gave NSE 46.78% of that. It is a lot to rest on one narrow base.

The risk is no longer just talk. SEBI tightened the weekly options rules in October 2024. Equity options daily turnover then fell about 21% from FY24 to FY26. The books followed. Revenue from operations fell 3.1% to ₹16,601 crore in FY26. Profit fell 15.5% to ₹10,302 crore. NSE also set aside ₹1,390 crore to settle SEBI cases on co-location, dark fibre and governance.

So the world's largest equity derivatives exchange, with 51.18% of global contracts, goes public just as its core segment shrinks. Traders who follow expiry-day trades have felt the same rules from the other side.

BSE is no longer a walkover

BSE once got by on habit. NSE had the liquidity, the tech and the network.

That has changed under Sundararaman Ramamurthy, who took charge in January 2023. BSE began courting brokers, tweaking lot sizes and shifting expiry days. Its index options premium share rose from about 16% in late 2024 to above 22% within months. The stock is up roughly 50% in the past year. NSE still holds 74.71% of options premium. But BSE is no longer a rounding error.

And BSE is where NSE will list. The rival taking its options share will host price discovery in NSE's own stock. SEBI watches both, so open foul play should surface. The clash of interest is still real.

Referee and player at once

Exchanges earn more when volumes rise. They must also police those volumes. The two aims pull apart.

The Jane Street case showed how. NSE warned the firm's local partner in February 2025 about its expiry-day trades. NSE then closed its own probe in a letter dated 30 April 2025, after a reply from Nuvama Wealth. Jane Street later called that report a clean chit in its appeal. SEBI pressed on and banned the firm in July 2025. Its wider review found a much broader pattern. NSE had checked only a few stocks in the first hour of trade.

Who owns the referee

Ownership adds a layer. LIC, a state-owned insurer, is the single largest holder with 10.72%. State-run bodies together hold close to 30%. Several are selling into the offer. SEBI gave the clearance that made it all possible.

Once NSE lists, the government sits in three seats at once. It is the regulator. It is the largest holder through LIC. And it gains from the sale. That is not proof of a conflict. It does raise fair questions about who sets the next call on transaction tax or expiry rules.

The clearing arm problem

Below NSE sits NSE Clearing. Rules make an exchange hold at least 51% of its clearing arm, so the two stay bound together.

After listing, holders will want NSE Clearing to earn more. Its real job is to protect the system. That often means spending more and earning less. SEBI raised this in a paper on 22 November 2024. It asked exchanges to cut their clearing stakes toward 15% over time.

Other markets took cleaner routes:

India layered its checks instead of splitting the job. Whether that holds under owner pressure is the open question.

Two details worth noting

NSE has no employee stock option plan, and its own filing lists talent as a risk. Rival fintech firms hand out equity freely to hire engineers. The body that makes everyone else's equity liquid does not use equity to keep its own staff.

The unlisted market has also cooled. NSE's unlisted shares traded near ₹2,020 on 24 August 2026, inside a 52-week band of ₹1,891 to ₹2,220. The big move already happened, from about ₹740 in 2021. Anyone hoping to repeat that run before listing is late.

The real question

By the numbers, NSE is a rare business. Its operating EBITDA margin is 66.85%. In FY26 it earned ₹842 crore just by investing the ₹30,146 crore of broker margin money it holds, plus ₹1,929 crore from its own cash. Whether NSE is a good business is not the debate. The deal details sit in the DRHP breakdown, the SEBI clearance timeline and the numbers against BSE.

The real question is different. Can a body built to referee India's markets answer to owners each quarter and still stay neutral? SEBI's answer so far is to layer walls, not to make a clean break. Nobody knows yet if that holds.

Sources: NSE draft red herring prospectus filed 17 June 2026 (614 pages); SEBI SECC Regulations, 2018; SEBI consultation paper on clearing corporation ownership dated 22 November 2024; NSE Indices methodology revision, August 2019; SEBI interim order in the Jane Street matter, July 2025. Financials are for FY26. Unlisted share prices are as of 24 August 2026 and are a guide only.