SEBI Specifies 'Significant Indices' — ₹20,000 Crore AUM Threshold, 48 Indices Listed, NSE/BSE/CR...

Q: Q6. As a mutual fund investor in a Nifty 50 index fund — what changes for me practically?

Two practical improvements: (1) Better governance transparency — once NSE Indices registers with SEBI, it must publicly disclose its methodology documents, constituent change information, and maintain a conflict of interest policy and independent oversight committee. This means you will have access to clearer explanations of why stocks are added to or removed from the Nifty 50, and there will be greater checks against opaque or conflicted index decisions. (2) Formal complaint mechanism — if you believe Nifty 50's administration has been unfair or non-compliant, you now have a statutory grievance channel under Regulation 23 of the IP Regulations. (Source: Outlook Money, January 2026)

SEBI Significant Indices Circular May 2026 – Index Providers Regulations

SEBI has issued a landmark circular on May 5, 2026 (Circular No. HO/47/17/12(8)2025-MRD-POD2) formally specifying the first-ever official list of 'Significant Indices' under the SEBI (Index Providers) Regulations, 2024. The circular identifies 48 indices — including Nifty 50, BSE Sensex, Nifty Bank, and a wide range of debt and hybrid benchmarks — that will now fall under SEBI's formal regulatory oversight. Index Providers administering these indices must apply for SEBI registration within six months from May 5, 2026 — a deadline of November 5, 2026. This circular is the operational trigger that brings the IP Regulations to life — and marks a pivotal shift in how India's rapidly growing passive investing ecosystem is governed.

💡 Circular at a Glance

Circular Number	HO/47/17/12(8)2025-MRD-POD2
Date of Issue	May 05, 2026
Issued By	Sanjay Singh Bhati, General Manager, SEBI (Tel: 022-26449222)
Addressed To	All Index Providers, All Stock Exchanges, All Mutual Funds, All AMCs, AMFI
Legal Authority	Section 11(1) of SEBI Act, 1992 + Regulation 38 + Regulation 2(1)(u) of IP Regulations
Effective Date	Immediate effect from May 05, 2026
Total Significant Indices	48 Indices (Annexure-A)
Registration Deadline	November 5, 2026 (6 months)

🏛️ Section 1 — Background: Why Did SEBI Need to Issue This Circular?

The Passive Investing Explosion in India

India's passive fund industry has witnessed extraordinary growth over the past five years. Total AUM in passive investments surged from ₹1.63 lakh crore in 2020 to approximately ₹15 lakh crore in 2026 — a nearly tenfold increase in six years. The number of passive investor folios has surpassed 5 crore (50 million), reflecting broad retail participation. (Source: NSE Indices CEO Aniruddha Chatterjee, press meet, April 2026 — The Tribune)

By December 2025, passive funds constituted approximately 18% of total mutual fund industry AUM — up from just 12% in December 2021. ETF and index fund AUM grew 27% in 2025 alone, moving from ₹11.11 lakh crore in December 2024 to ₹14.07 lakh crore by November 2025. (Source: AMFI data, Angel One / AMFI, December 2025)

Yet, these indices — the Nifty 50, BSE Sensex, Nifty Bank, CRISIL Liquid debt benchmarks — were governed by their providers largely through internal policies with no formal SEBI oversight framework. Index providers could exercise significant discretion in creating, modifying, or restructuring indices that collectively move trillions of rupees in investor assets — with no statutory accountability to investors. (Source: Khaitan & Co analysis on SEBI IP Regulations, April 2024)

The Regulatory Journey — From 2017 to 2026

Year	Milestone
2017	SEBI published first discussion paper on a code of conduct for Index Providers — signalling intent to regulate (Khaitan & Co)
2024	SEBI notified the SEBI (Index Providers) Regulations, 2024 on March 8, 2024 — establishing governance framework, but requiring 'Significant Indices' list to operationalise (Business Standard, March 2024)
Jan 2026	SEBI issued consultation paper proposing ₹20,000 Cr AUM threshold and provisional list of 47 indices for public comments until February 10, 2026 (TaxGuru / SEBI, January 2026)
May 5, 2026	✅ Final circular issued — AUM threshold formalised, first official list of 48 Significant Indices published, registration obligations triggered (Source: SEBI Circular HO/47/17/12(8)2025-MRD-POD2)

📌 Why Does Index Governance Matter? The Conflict of Interest Problem

Index providers can exercise discretion in creating or modifying an index — decisions which can directly impact the volume, liquidity, and price of a stock. When a stock is added to or removed from the Nifty 50, for instance, passive funds tracking it must buy or sell those shares — irrespective of fundamental value. This creates concerns about conflict of interest when the index provider has other commercial relationships with the companies being considered for inclusion or exclusion. The IP Regulations — and this circular — are designed to address precisely this governance gap. (Khaitan & Co via Lexology, April 2024)

📋 Section 2 — The IP Regulations Framework: What Was Already in Place?

Before this circular could operationalise them, the SEBI (Index Providers) Regulations, 2024 had already prescribed a comprehensive governance framework for registered Index Providers. Understanding this framework is essential to appreciate what NSE Indices, BSE Index Services, and CRISIL will be required to comply with once registered. (Source: TaxGuru analysis of IP Regulations, July 2024)

Requirement Under IP Regulations	Details
Registration with SEBI	Every Index Provider administering Significant Indices must hold a SEBI-issued certificate of registration under Regulation 4
Independent Oversight Committee	Must constitute an independent committee to govern all aspects of benchmark determination — separate from day-to-day index calculation/maintenance operations
Conflict of Interest Policy	Mandatory policies and procedures to protect integrity and independence of index-related functions
Control Framework	Documented framework for calculating, maintaining, and disseminating the index — available to SEBI on request
Methodology Disclosure	Must publicly disclose (a) data input guidelines and calculation methodology; (b) changes in index constituents
Code of Conduct	Modelled on IOSCO principles — maintaining objectivity, adequate disclosures, periodic review, preventing misuse of privileged information, preventing market manipulation
Compliance Officer	Must appoint a compliance officer responsible for monitoring compliance with SEBI Act, rules, regulations, and circulars
Whistle-Blower Mechanism	Effective whistle-blowing mechanism to facilitate early awareness of potential misconduct
Grievance Redressal	Under Regulation 23 — subscribers to Significant Indices have formal recourse to raise complaints

📐 Section 3 — Definition of 'Significant Index' and the AUM Threshold

Legal Definition — Regulation 2(1)(u) of IP Regulations

The IP Regulations define 'Significant Indices' as follows — quoted directly from the regulation:

"Indices administered by an Index Provider, which are tracked or benchmarked by domestic mutual fund schemes with the cumulative assets under management exceeding the limits as may be specified from time to time.

Explanation: The list of 'Significant Indices' shall be specified by the Board from time to time."

Regulation 3(1) further limits the applicability of the IP Regulations:

"These regulations shall be applicable only to Index Providers that administer Significant Indices consisting of securities listed on a recognized stock exchange in India for use in the Indian securities market."

The AUM Threshold — As Specified in This Circular (Para 4)

Parameter	Specification (from Circular Para 4)
AUM Threshold	Daily average cumulative AUM tracking the Benchmark or Index across all Mutual Fund schemes must exceed ₹20,000 Crore
Measurement Basis	The threshold must be exceeded for each of the past six months, ending on 30th June and 31st December of each year — every single month in the half-year period must clear the threshold
Coverage	Any Benchmark or Index based on listed securities — including index of indices
Review Frequency	Half-yearly — based on data ending June 30 and December 31 each year
First List Based On	AUM data for July 1, 2025 to December 31, 2025

Removal from the List — The 3-Year Continuity Rule (Para 5)

Once included in the Significant Indices list, an index cannot be removed easily. It will remain on the list unless cumulative AUM falls below the ₹20,000 Crore threshold for a continuous period of three years (i.e., six consecutive half-yearly reviews).

✅ Why 3-Year Continuity for Removal?

This "sticky removal" mechanism prevents indices from oscillating in and out of regulated status due to temporary AUM fluctuations — for example, during market downturns or redemption spikes. It provides regulatory stability for index providers and fund houses that have invested in compliance infrastructure around regulated indices. (Source: SEBI Circular Para 5 + consultation paper analysis, TaxGuru, January 2026)

⚡ Section 4 — Key Obligations: What Must Be Done Now?

Obligation 1 — SEBI Registration Within 6 Months (Para 7)

Every Index Provider administering any of the 48 Significant Indices in Annexure-A must submit a registration application to SEBI under Regulation 4 of the IP Regulations within 6 months from May 5, 2026 — i.e., by November 5, 2026.

⏰ Critical Deadline — November 5, 2026

NSE Indices Limited, BSE Index Services Pvt. Ltd., and CRISIL — the three providers responsible for all 48 Significant Indices — must all apply for formal SEBI registration by this date. (Source: SEBI Circular Para 7)

Who Is Exempt from Registration? (Para 7 — Two Exceptions)

The registration requirement does not apply to an Index Provider if all of its Significant Indices fall under either of these categories:

Exception	Condition	Legal Basis
Exception (a)	All Significant Indices are notified by RBI as 'Significant Benchmarks'	RBI directions under Section 45W of the RBI Act, 1934
Exception (b)	All Significant Indices are classified by RBI as 'Authorized Benchmarks'	RBI directions under Section 45W of the RBI Act, 1934

⚠️ "All or None" Rule — Exception Applies Only If ALL Indices Qualify

The exemption applies only when every single Significant Index provided by that Index Provider falls under the RBI framework — not just some. If even one index on Annexure-A is not an RBI-regulated benchmark, the provider must register with SEBI. Additionally, per the footnote in Annexure-A, any index on the SEBI list that is also notified as an RBI Significant Benchmark or Authorised Benchmark shall be excluded from IP Regulations — even while remaining on the SEBI list. (Source: SEBI Circular Para 7 and Annexure-A footnote)

Obligation 2 — Existing Providers May Continue Operating During Transition (Para 8)

Any Index Provider already administering Significant Indices as on May 5, 2026 may continue its Index Provider activity without interruption during the 6-month registration window, provided it submits a registration application within that period. This ensures no disruption to the functioning of indices, fund benchmarks, or market operations during the transition. (Source: SEBI Circular Para 8)

Obligation 3 — Departmental Index Operations Must Be Separated into a New Legal Entity Within 2 Years (Para 9)

❌ Current Position (the Problem)

Some SEBI-registered entities (e.g., stock exchanges, credit rating agencies, clearing corporations) also provide Significant Indices as a departmental function — i.e., as an internal division rather than a separate legal entity. This creates structural conflicts of interest and blurs regulatory accountability between the entity's primary SEBI-regulated role and its index administration function.

✅ New Requirement

Such entities must form a separate legal entity to carry out Index Provider activities within 2 years from May 5, 2026 — i.e., by May 5, 2028. This structural separation ring-fences index operations from other regulated businesses and eliminates cross-functional conflicts of interest. (Source: SEBI Circular Para 9)

Obligation 4 — Grievance Redressal Now Available for Index Subscribers (Para 10)

The circular clarifies that the grievance redressal mechanism under Regulation 23 of IP Regulations applies only to Significant Indices provided by SEBI-registered Index Providers. Once registration is completed, subscribers to those indices will have a formal statutory mechanism to raise complaints — a right that previously did not exist. (Source: SEBI Circular Para 10; Outlook Money, January 2026)

📅 Section 5 — Key Timelines at a Glance

Event	Date / Deadline	Para Ref
SEBI (IP) Regulations, 2024 notified	March 8, 2024	—
Consultation paper on AUM threshold issued	January 19, 2026 (public comments by Feb 10, 2026)	—
This Circular issued; comes into force	May 05, 2026 (immediate effect)	Para 11
AUM data period for first Significant Indices list	July 1, 2025 – December 31, 2025	Para 6
⏰ Registration application deadline	November 5, 2026 (6 months from May 5, 2026)	Para 7
⏰ Structural separation deadline	May 5, 2028 (2 years from May 5, 2026)	Para 9
Next half-yearly AUM review (to add indices)	Based on data ending June 30, 2026	Para 4
Earliest possible removal from list	Only after 3 continuous years below threshold (6 consecutive half-yearly reviews)	Para 5

📊 Section 6 — Annexure-A: The 48 Significant Indices (Complete Official List)

The first official list — based on AUM data for July 1 to December 31, 2025 — comprises 48 indices across three providers: NSE Indices Limited (31 indices), BSE Index Services Pvt. Ltd. (9 indices), and CRISIL (8 indices). (Source: SEBI Circular Annexure-A)

BSE Index Services Pvt. Ltd. — 9 Indices

Sr.	Index Name	Type
1	BSE 100	Broad Market Equity
2	BSE 200	Broad Market Equity
3	BSE 250 Smallcap	Small Cap Equity
4	BSE 500	Broad Market Equity
5	BSE Healthcare	Sectoral / Thematic
6	BSE India Infrastructure	Sectoral / Thematic
7	BSE 150 Midcap	Mid Cap Equity
8	BSE Sensex	Headline / Flagship Index
9	BSE Teck	Sectoral / Thematic

CRISIL — 8 Indices

Sr.	Index Name	Type
10	CRISIL Hybrid 35+65 – Aggressive	Hybrid
11	CRISIL Hybrid 50+50 – Moderate	Hybrid
12	CRISIL Liquid Debt A I	Debt / Liquid
13	CRISIL Liquid Overnight	Debt / Overnight
14	CRISIL Low Duration Debt A-I	Debt
15	CRISIL Money Market A-I	Debt / Money Market
16	CRISIL Short Duration Debt A-II	Debt
17	CRISIL Ultra Short Duration Debt A-I	Debt

NSE Indices Limited — 31 Indices

Sr.	Index Name	Type
18	Nifty 100	Broad Market Equity
19	Nifty 1D Rate	Debt / Overnight Rate
20	Nifty 200	Broad Market Equity
21	Nifty 50	Headline / Flagship Index
22	Nifty 50 Arbitrage	Strategy
23	Nifty 50 Hybrid Composite Debt 50:50	Hybrid
24	Nifty 50 Hybrid Composite Debt 65:35	Hybrid
25	Nifty 500	Broad Market Equity
26	Nifty All Duration G-Sec	Debt / G-Sec
27	Nifty Bank	Sectoral (Banking)
28	Nifty Banking & PSU Debt A-II	Debt
29	Nifty BHARAT Bond – April 2030	Debt / Target Maturity
30	Nifty Composite Debt	Debt
31	Nifty Composite Debt A-III	Debt
32	Nifty Corporate Bond A-II	Debt
33	Nifty CPSE	Sectoral / Thematic (PSU)
34	Nifty Equity Savings	Hybrid
35	Nifty Financial Services	Sectoral (BFSI)
36	Nifty India Consumption	Thematic
37	Nifty India Manufacturing	Thematic
38	Nifty Infrastructure	Sectoral / Thematic
39	Nifty LargeMidcap 250	Broad Market Equity
40	Nifty Liquid A-I	Debt / Liquid
41	Nifty Low Duration Debt A-I	Debt
42	Nifty Midcap 150	Mid Cap Equity
43	Nifty Money Market A-I	Debt / Money Market
44	Nifty Next 50	Broad Market Equity
45	Nifty Short Duration Debt A-II	Debt
46	Nifty Smallcap 250	Small Cap Equity
47	Nifty Ultra Short Duration Debt A-I	Debt
48	Nifty500 Multicap 50:25:25	Broad Market Equity

🔄 Section 7 — Before vs After: What This Circular Changes

Aspect	Before (Pre-May 5, 2026)	After (Post-May 5, 2026)
AUM Threshold	Not specified — Significant Indices list could not be finalised	Formally set at ₹20,000 Cr daily average AUM for each of 6 months
Official Significant Indices List	Did not exist — IP Regulations operationally incomplete	48 indices officially specified in Annexure-A
IP Regulations Applicability	Could not be triggered without the Significant Indices list	Fully operative for all 48 listed indices
SEBI Registration of NSE/BSE/CRISIL	Not required under SEBI in Index Provider capacity	Must apply for SEBI registration by November 5, 2026
Investor Grievance on Index Admin	No formal statutory mechanism existed for investors	Regulation 23 grievance mechanism available post-registration
Methodology Transparency	Internal policies only; no public disclosure mandate	Post-registration: public disclosure of methodology documents and constituent change information is mandatory
Departmental Index Operations	Permitted — no structural separation requirement	Must be separated into a distinct legal entity by May 5, 2028
Conflict of Interest Framework	Voluntary; no regulator-mandated policies	Mandatory conflict of interest policies, independent oversight committee, and whistle-blower mechanism required post-registration

👥 Section 8 — Who Is Affected and What Must They Do?

Stakeholder	Impact	Immediate Action Required
NSE Indices Limited (31 indices on list)	Largest number of Significant Indices including Nifty 50, Nifty Bank, all debt/hybrid NSE indices	Apply for SEBI registration by November 5, 2026; set up independent oversight committee, conflict of interest policy, compliance officer
BSE Index Services Pvt. Ltd. (9 indices on list)	BSE Sensex, BSE 100/200/500, sectoral indices — all now regulated	Apply for SEBI registration by November 5, 2026; implement IP Regulations governance framework
CRISIL (8 indices on list)	Primarily debt and hybrid benchmarks used widely in mutual fund schemes	Apply for SEBI registration by November 5, 2026; evaluate whether any indices may qualify for RBI exemption
Mutual Funds / AMCs	Benchmark and tracking indices now formally regulated; methodology disclosures become mandatory for providers; grievance redressal available	Monitor registration status of index providers; note Regulation 23 grievance recourse now available for Significant Indices; no immediate structural changes required
Stock Exchanges / Other SEBI-Registered Entities running Index Operations Departmentally	Must structurally separate index operations into a distinct legal entity	Begin planning separation process; complete incorporation of separate entity and transfer of index business by May 5, 2028
Index Subscribers / Investors	First-ever statutory grievance redressal available; better methodology transparency; stronger governance of index providers	No immediate action required; use Regulation 23 once providers are SEBI-registered
Global Index Providers (MSCI, FTSE, Nasdaq, etc.)	Not directly impacted if their India-specific indices are used primarily by overseas investors or are exclusively for foreign jurisdictions	Assess whether any India-listed-securities indices are benchmarked by domestic mutual fund schemes crossing the ₹20,000 Cr threshold; take legal advice if applicable

❓ Frequently Asked Questions

Q1. What exactly is the AUM threshold for an index to qualify as 'Significant'?

Per Para 4 of the circular, a Benchmark or Index is 'Significant' if its daily average cumulative AUM tracked across all domestic mutual fund schemes exceeds ₹20,000 Crore for each of the past six months ending June 30 or December 31. The key word is "each" — the threshold must be sustained every single month of the half-year, not just on average. A temporary spike crossing ₹20,000 Cr is not sufficient; consistent sustained tracking AUM is required. (Source: SEBI Circular Para 4)

Q2. Once on the list, how long before an index can be removed?

An index remains on the Significant Indices list until its cumulative AUM falls below the ₹20,000 Crore threshold for a continuous period of three years — meaning six consecutive half-yearly reviews must all show sub-threshold AUM. A single below-threshold reading does not trigger removal. This stability mechanism prevents compliance churn from temporary market AUM fluctuations. (Source: SEBI Circular Para 5)

Q3. Can NSE Indices / BSE Index Services / CRISIL continue operating while their registration application is pending?

Yes, explicitly. Para 8 of the circular states that any Index Provider providing Significant Indices as on the date of the circular (May 5, 2026) may continue its Index Provider activity during the 6-month application window — provided it submits a registration application to SEBI within those 6 months. There is no disruption to existing indices, fund benchmarks, or market operations during the transition. (Source: SEBI Circular Para 8)

Q4. What happens if an Index Provider misses the November 5, 2026 registration deadline?

The circular does not specify a penalty in this circular itself, but under the SEBI (IP) Regulations, 2024 and the SEBI Act, operating as an unregistered Index Provider after the prescribed period would constitute a violation of the regulations, potentially exposing the provider to action under the SEBI (Intermediaries) Regulations, 2008. SEBI retains broad powers to impose penalties, deregister, or take other action for non-compliance. Index Providers should treat this deadline as non-negotiable.

Q5. Does this circular apply to MSCI India or other global index providers?

Not directly. The IP Regulations — and this circular — apply only to Index Providers administering Significant Indices consisting of securities listed on a recognised Indian stock exchange for use in the Indian securities market. Global providers whose indices consist of global assets, or are used exclusively in foreign jurisdictions, are exempt. However, if a global provider administers India-specific indices that are tracked by domestic mutual funds above the ₹20,000 Crore threshold, those indices would fall within scope. (Source: IP Regulations Regulation 3(1); Business Standard, March 2024)

Q6. As a mutual fund investor in a Nifty 50 index fund — what changes for me practically?

Two practical improvements: (1) Better governance transparency — once NSE Indices registers with SEBI, it must publicly disclose its methodology documents, constituent change information, and maintain a conflict of interest policy and independent oversight committee. This means you will have access to clearer explanations of why stocks are added to or removed from the Nifty 50, and there will be greater checks against opaque or conflicted index decisions. (2) Formal complaint mechanism — if you believe Nifty 50's administration has been unfair or non-compliant, you now have a statutory grievance channel under Regulation 23 of the IP Regulations. (Source: Outlook Money, January 2026)

Q7. How is AUM calculated for an index that is used in multiple types of schemes — e.g., both an index fund and a hybrid fund?

For schemes that track multiple indices or benchmarks simultaneously, the AUM is attributed proportionally based on each index's weight in the scheme's overall benchmark. For an index of indices (e.g., a hybrid composite of equity + debt indices), the AUM tracking each underlying index is included in proportion to its weight. This methodology prevents double-counting while ensuring the full economic significance of each index is correctly reflected in its AUM calculation. (Source: SEBI Consultation Paper on Significant Indices, January 2026 — TaxGuru)

Q8. Why are debt and hybrid indices like CRISIL Liquid Overnight or Nifty 1D Rate included alongside equity indices like Nifty 50?

The definition of Significant Indices in the IP Regulations is AUM-agnostic with respect to asset class — it applies to any benchmark tracked by domestic mutual fund schemes exceeding ₹20,000 Crore. Liquid fund and overnight fund categories collectively hold enormous AUM because they are widely used by corporations, institutions, and individuals for short-term cash parking. The CRISIL Liquid Overnight and Nifty 1D Rate indices easily clear the ₹20,000 Crore threshold. Their inclusion recognises that governance failures in debt benchmarks can be just as harmful to investors as governance failures in equity indices — as India learned from the LIBOR manipulation scandal internationally. (Source: Khaitan & Co, SEBI IP Regulations analysis, April 2024)

📝 Bottom Line

SEBI's May 5, 2026 circular completes the long-pending operationalisation of the SEBI (Index Providers) Regulations, 2024. India's passive investment AUM has grown from ₹1.63 lakh crore in 2020 to approximately ₹15 lakh crore in 2026 — driven by over 5 crore investor folios — making the governance of index providers a matter of systemic importance, not merely a regulatory formality. (Tribune India / NSE Indices, April 2026) By formally specifying the ₹20,000 Crore AUM threshold and publishing the first list of 48 Significant Indices, SEBI has created clear accountability for NSE Indices, BSE Index Services, and CRISIL — three providers that underpin the benchmarks of the vast majority of India's passive fund industry. The key takeaways: registration by November 5, 2026; departmental index operations must be structurally separated by May 5, 2028; the 3-year continuity rule protects against abrupt list changes; and for the first time, investors have a formal grievance mechanism for index administration. This is a landmark step in the maturation of India's capital markets.

Primary Source: SEBI Circular No. HO/47/17/12(8)2025-MRD-POD2 dated May 05, 2026, issued by Sanjay Singh Bhati, General Manager, SEBI. Available at sebi.gov.in under "Legal Framework – Circulars." | Additional Sources: NSE Indices Press Meet / The Tribune (April 2026); AMFI / Angel One (December 2025); SEBI Consultation Paper (January 2026, TaxGuru); Khaitan & Co / Lexology (April 2024); Business Standard (March 2024); Outlook Money (January 2026). This article is for informational purposes only and does not constitute legal or investment advice.

SEBI Specifies 'Significant Indices' — ₹20,000 Crore AUM Threshold, 48 Indices Listed, NSE/BSE/CRISIL Must Register by November 2026