SEBI clears Rs 1,491 crore NSE co-location and dark fibre settlement

The Enforcement Action

The Securities and Exchange Board of India (SEBI) has cleared a settlement with the National Stock Exchange (NSE) that closes the long-running co-location and dark fibre proceedings, one of the most closely watched market-structure matters in recent Indian regulatory history. According to reporting by The Economic Times, NSE has paid the remaining Rs 714.74 crore to SEBI, completing a total settlement of Rs 1,491.21 crore across the co-location and dark fibre cases. The payment followed SEBI's in-principle approval and clears a significant hurdle ahead of the exchange's planned public offering.

A settlement under SEBI's framework is a regulatory resolution, not a finding of guilt. Under the SEBI (Settlement Proceedings) Regulations, 2018, an entity may resolve pending proceedings by paying settlement charges and, where applicable, disgorgement, without an admission or denial of the findings alleged. The clearance therefore closes the enforcement chapter without recording a verdict against the exchange.

The matter itself traces back to SEBI's order dated 30 April 2019 in the NSE co-location matter. In that order, SEBI directed NSE to disgorge Rs 624.89 crore, together with interest at 12% per annum from 1 April 2014, to the Investor Protection and Education Fund (IPEF), within 45 days. SEBI also issued directions against two former managing directors and chief executives of the exchange. NSE contested the disgorgement before the Securities Appellate Tribunal (SAT), and the litigation remained pending for years before the parties moved to settle.

How the Scheme Worked

Per SEBI's 2019 order, the case centred on how NSE disseminated its tick-by-tick (TBT) data feed to trading members who had taken space in the exchange's co-location facility. The TBT feed, which the order describes as carrying information about every change in the order book, was delivered over the Transmission Control Protocol/Internet Protocol (TCP/IP). Under that protocol, the order notes, information is delivered "one-by-one" rather than broadcast to everyone at the same time, so the data reached trading members sequentially, in the order in which they connected.

According to the order, this architecture created a first-mover advantage. The technical findings recorded in the order observed that the "NSE TBT architecture was prone to market abuse thereby compromising market fairness and integrity", because an entity that logged in early could receive order-book information ahead of others through the trading day. SEBI examined a cluster of related issues: the first-connect or early-login advantage, the allocation of IP addresses and the absence of a load balancer, the absence of a randomiser, and access to secondary or backup servers.

The order records allegations that one trading member, OPG Securities Pvt. Ltd., used the system to its advantage, including by engaging a person formerly with a technology vendor to identify which server performed better, and through arrangements said to involve NSE datacentre staff who could indicate when servers would start, allowing it to connect first. SEBI's central conclusion was institutional: as a stock exchange, NSE was obliged to provide equal and fair access, and its handling of the co-location and TBT infrastructure fell short of that duty during the relevant period. The order notes that TBT data dissemination ran from around June 2010 to March 2014.

The parallel dark fibre matter, which the current settlement also covers, concerned connectivity arrangements through which certain members are said to have obtained faster point-to-point links to the exchange. SEBI pursued that as a separate proceeding; the settlement now folds both strands into a single resolution.

The Law Invoked

SEBI's 2019 order was passed under section 19 of the SEBI Act, 1992, read with sections 11, 11(4) and 11B of that Act, and section 12A of the Securities Contracts (Regulation) Act, 1956 (SCRA), read with Regulation 49 of the SEBI (Stock Exchanges and Clearing Corporations) Regulations, 2012 (the SECC Regulations). Sections 11, 11(4) and 11B empower SEBI to issue directions, including disgorgement, to protect investors and the securities market. Section 12A of the SCRA addresses fraudulent and unfair trade practices in relation to dealing in securities on exchanges.

The order turned in large part on the SECC Regulations, which govern the conduct of market infrastructure institutions. It cites Regulation 41(2), which the order states "casts a duty on every stock exchange to provide equal, fair and transparent access", alongside Regulation 48. The order also refers to Section 4 of the SCRA, which concerns an exchange's obligation to ensure fair dealing as a condition of its recognition.

These are the provisions that framed the underlying proceeding. The present development is procedural rather than substantive: it is a settlement under the SEBI (Settlement Proceedings) Regulations, 2018, which allows pending matters to be resolved on payment of agreed settlement terms.

What Happens Next

With the settlement amount paid in full, SEBI's settlement process typically concludes with a formal settlement order recording the terms and disposing of the proceedings. A settlement closes the specific matters it covers; it does not amount to a finding that the allegations were proved, and it is distinct from a contested order, which can be appealed to the SAT and onward to the Supreme Court.

For NSE, the resolution removes an overhang that has shadowed the exchange for years. According to The Economic Times, the exchange has been working towards a large public offering, and the co-location and dark fibre proceedings were widely seen as a gating item for that plan. Clearing the settlement narrows the list of pending regulatory issues, though any listing remains subject to the usual approvals.

Where directions in the original 2019 order remain the subject of separate proceedings or appeals for other parties, those follow their own course. As a general principle, regulatory allegations that have not been adjudicated to a conclusion, or that are resolved by settlement, are not findings of wrongdoing against the individuals or entities concerned.

What It Means

For ordinary investors, the co-location matter is less about one exchange and more about a principle that underpins every trade placed on a screen: that access to price information should be fair. The case put a spotlight on the plumbing of modern markets, where fractions of a second of advantage in receiving order-book data can be valuable to high-frequency trading strategies. SEBI's action, and the years of scrutiny that followed, pushed exchanges to strengthen how they administer co-location, data feeds and connectivity.

The practical takeaway is about process rather than panic. A settlement is a legitimate, rules-based way to close a dispute, and disgorgement of this kind is channelled into the Investor Protection and Education Fund rather than to any private party. Retail investors are not directly affected by the settlement mechanics, but they benefit from the tighter access-fairness norms the episode helped cement.

There is also a verification lesson. Investors dealing through brokers can confirm that their intermediary is registered with SEBI using the regulator's public lookup on sebi.gov.in, and can check that any exchange or platform they use is a recognised market infrastructure institution. Fair and equal access is a regulated right, and the co-location matter is a reminder that SEBI treats breaches of it as serious.

FAQ

What exactly did SEBI clear?

According to reporting by The Economic Times, SEBI cleared NSE's settlement of the co-location and dark fibre cases, with the exchange paying the remaining Rs 714.74 crore to complete a total of Rs 1,491.21 crore. A settlement resolves the proceedings on agreed terms under the SEBI (Settlement Proceedings) Regulations, 2018.

Does a settlement mean NSE was found guilty?

No. Under SEBI's settlement framework, matters are resolved without an admission or denial of the findings alleged. A settlement is a regulatory resolution, not a conviction or a determination of guilt, and it closes the specific proceedings it covers rather than pronouncing on their merits.

What was the co-location case about?

Per SEBI's 2019 order, it concerned whether NSE's tick-by-tick data feed, delivered over TCP/IP to members in its co-location facility, gave an unfair advantage to those who connected first. SEBI found the exchange had not ensured the equal and fair access required of a stock exchange during the relevant period.

How much was the original 2019 disgorgement?

SEBI's order dated 30 April 2019 directed NSE to disgorge Rs 624.89 crore, with interest at 12% per annum from 1 April 2014, to the Investor Protection and Education Fund. NSE challenged that direction before the Securities Appellate Tribunal, and the litigation remained pending before the parties moved to settle.

How can I check if my broker is registered with SEBI?

SEBI maintains public registers of registered intermediaries on its official website, sebi.gov.in, where investors can verify a broker's or adviser's registration number and status. Investors can also confirm that an exchange or clearing corporation is a recognised market infrastructure institution before trading through it.

Where can I read the official order?

SEBI's 30 April 2019 order in the NSE co-location matter is published on the regulator's website and sets out the findings, the statutory provisions invoked and the directions issued, including the disgorgement direction.

This report is based on the official SEBI order dated 30 April 2019 in the NSE co-location matter. The settlement development was surfaced via coverage in The Economic Times.