Market Infrastructure Institutions
Also written Market Infrastructure Institutions (MIIs) · MII · MIIs
The institutions that form the plumbing of the securities market — stock exchanges, depositories and clearing corporations, and under SEBI's cyber framework also KRAs and QRTAs.
In plain language
Some institutions in a securities market are not participants in it — they are the market. If one of them stops, everybody stops. SEBI calls these Market Infrastructure Institutions, and regulates them differently from the brokers and funds that use them.
The core three are the ones a Series I candidate meets constantly:
- Stock exchanges — provide the platform where a buyer and a seller meet and a trade is executed.
- Clearing corporations — settle the trade, and guarantee it, by becoming the central counterparty to both sides through novation.
- Depositories — hold securities in dematerialised form.
SEBI's Cyber Security and Cyber Resilience Framework (CSCRF) extends the list to five, adding KYC Registration Agencies (KRAs) and Qualified Registrars and Transfer Agents (QRTAs), because they too hold data whose failure would be systemic.
The phrase is used in two different scopes in the workbook, and that is the whole difficulty of the term.
How it works
Under the CSCRF, notified by SEBI to take effect in phases from 1 January 2025, the following regulated entities are constituted as MIIs: stock exchanges, depositories, clearing corporations, KRAs and QRTAs. They face the strictest tier of cyber obligations, built on five cyber-resiliency goals — anticipate, withstand, contain, recover, evolve.
In the investor grievance chapter, the workbook uses a narrower phrase: "stock exchanges and depositories, together known as Market Infrastructure Institutions". In that context SEBI has directed the MIIs to establish a common Online Dispute Resolution (ODR) portal for conciliation and arbitration, extending a mechanism that previously covered only broker-client disputes to all specified intermediaries.
MIIs also carry ongoing transparency duties: complaints and their redressal must be disclosed by the 7th of the succeeding month, and an exchange must disclose the corpus of its Investor Protection Fund on its website and update it monthly, with a half-yearly review by the end of March and September of whether that corpus is adequate.
The practical point for a currency derivatives candidate is that the trade guarantee that makes exchange traded derivatives free of counterparty credit risk is an MII function. It is not the broker's promise; it is the clearing corporation's.
The formula
CSCRF list of MIIs (five):
Stock Exchanges
Depositories
Clearing Corporations
KYC Registration Agencies (KRAs)
Qualified Registrars and Transfer Agents (QRTAs)
ODR chapter usage (two):
Stock exchanges and depositories
A worked example
A client in Nashik disputes Rs 42 lakh with his broker over currency futures trades: he claims Rs 30,00,000 and the broker counter-claims Rs 12,00,000. He goes through the MII-administered machinery.
Step 1 — the intermediary. He must first approach the broker itself.
Step 2 — the exchange, then SEBI. Unsatisfied, he complains to the stock exchange of which the broker is a member, and then on SCORES.
Step 3 — the common ODR portal, which SEBI directed the MIIs to establish. Conciliation is attempted first.
Step 4 — arbitration, and here the rupee arithmetic decides the forum:
Claim = Rs 30,00,000
Counter-claim = Rs 12,00,000
Aggregate = Rs 42,00,000
Because the aggregate of claim and counter-claim exceeds Rs 30,00,000, the matter goes not to a sole arbitrator but to an Arbitral Tribunal of three arbitrators, appointed within 5 calendar days of reference and receipt of fees. The award is due within 30 calendar days of appointment, extendable by a further 30 for reasons recorded in writing.
Had the claim been Rs 8,00,000 with no counter-claim, a sole arbitrator would have been appointed within 5 calendar days, with the same 30-day award deadline. Had it been Rs 1,00,000 or less, the sole arbitrator would have conducted a document-only arbitration, with no hearing unless he chose to grant one.
Rs 30 lakh is a threshold on the aggregate, not on either side alone — a Rs 25 lakh claim met by a Rs 10 lakh counter-claim still goes to a three-member tribunal.
Why NISM asks about it
MIIs appear in two chapters of Series I and the wording differs in each, which is exactly what gets tested. Chapter 7 (Clearing, Settlement and Risk Management), section 7.12, gives the CSCRF list of five. Chapter 10 (Codes of Conduct and Investor Protection Measures), section 10.2.1, uses the narrower "stock exchanges and depositories" formulation when introducing the ODR portal, and Chapter 10 also carries the complaint-disclosure and IPF-corpus duties.
The examinable question is usually "which of the following is a Market Infrastructure Institution?" — and when KRAs or QRTAs appear among the options, the answer turns on whether the question is anchored in the cyber framework. Read the stem for CSCRF before answering.
Common exam traps
- Two different lists, both correct in their own context. CSCRF names five; the grievance chapter names two. A question that mentions cyber security means the list of five.
- A broker is not an MII. Nor is a depository participant, a KRA's client, or a registered intermediary — they are regulated entities that use the infrastructure. The CSCRF applies to brokers and DPs too, but as regulated entities, not as MIIs.
- Clearing corporation and exchange are different institutions with different jobs. The exchange brings buyer and seller together; the clearing corporation settles with a trade guarantee by becoming the central counterparty through novation.
- Rs 30 lakh is an aggregate threshold for the arbitration forum — claim plus counter-claim, not either alone.
- The ODR route is not the first step. The investor must approach the intermediary, then the exchange or SCORES, before ODR.
- MII status is about systemic importance, not size. It is why these entities carry cyber, disclosure and grievance obligations that ordinary intermediaries do not.
Where this is taught
- Series IV · Chapter 10: Code of Conduct and Investor Protection Measuresintroduced here
- Series I · Chapter 10: Codes of Conduct and Investor Protection Measuresintroduced here
- Series VIII · Chapter 8: Legal and Regulatory Environmentintroduced here
- Series XXIII · Chapter 1: Introduction to Social Sector Ecosystemintroduced here
- Series II-B · Chapter 6: Basics of Registrars and Transfer Agentsintroduced here
Related terms
- NovationThe clearing corporation stepping into the middle of every trade — becoming the buyer to every seller and the seller to every buyer — so that neither side carries the other's default risk.
- ArbitrationQuasi-judicial dispute resolution under the Arbitration and Conciliation Act, 1996, run online by an ODR Institution once conciliation fails; the award binds unless challenged under Section 34.
- InteroperabilityA clearing member choosing one clearing corporation to clear and settle everything it trades, across all exchanges, instead of being tied to a separate clearing corporation per exchange.
- KYC Registration AgencyA SEBI-created agency that holds an investor's verified KYC record centrally, so that one KYC completed with any securities market intermediary works with all the others.
- Clearing corporationThe entity that steps between every buyer and seller in the derivatives segment by novation, becoming the counterparty to both sides and guaranteeing that the trade settles.
- DepositoryAn institution that holds investors' securities in electronic form and provides the services needed to transact in them — the securities equivalent of a bank holding money rather than cash.
- Online Dispute ResolutionThe MII-administered process — pre-conciliation, conciliation, then arbitration — through which investor disputes with portfolio managers are resolved online via the SMART ODR portal.
- Cyber Security RiskThe risk that an AIF's or its service providers' systems are breached, corrupted or disrupted — governed by SEBI's Cyber Security and Cyber Resilience Framework, which all AIFs had to comply with by 31 August 2025.
- Social Stock ExchangeA separate segment of a recognised stock exchange on which Not for Profit Organisations and For Profit Social Enterprises register and list securities to raise money for social impact, under SEBI rules.
- Financial systemThe whole set of institutional arrangements that move funds from surplus units (households) to deficit units (companies and governments) — made up of financial markets, instruments and intermediaries.
- Stock exchangeA body of individuals, or a body incorporated under the Companies Act, that assists, regulates or controls the business of buying, selling or dealing in securities.
- Authorised personTwo different entities share this name: under SEBI, an agent appointed by a stock broker to give clients access to the trading platform; under FEMA, a dealer authorised by RBI to deal in foreign exchange.
- IRRA platformInvestor Risk Reduction Access — a joint exchange platform that lets individual investors square off open positions and cancel pending orders when their trading member's services are disrupted by a technical glitch.
- Cyber resilienceAn organisation's ability to prepare for and respond to a cyber-attack, keep functioning during it and recover from it — the second half of SEBI's Cyber Security and Cyber Resilience Framework.
- Innovation SandboxA SEBI framework letting FinTech firms, start-ups and others not regulated by SEBI test their solutions offline, in isolation from the live market, overseen by exchanges, depositories and qualified RTAs.