Description
ICCL adjusts cross margin weightages for indices due to Vedanta Limited demerger, with exclusion effective April 29 and revised weightages from May 5, 2026. Spread margins for NIFTYNXT50 and SX40 temporarily increased from 25% to 30%.
Summary
The Indian Clearing Corporation Ltd (ICCL) has issued this notice in reference to circular no. 20260424-33 dated April 24, 2026, detailing adjustments to cross margin weightages for indices due to the demerger of Vedanta Limited (BSE: 500295). Vedanta Limited will be excluded from cross margin computation effective April 29, 2026 end of day, with revised index weightages published based on closing prices on April 30, 2026 and applicable from May 5, 2026.
Key Points
- Vedanta Limited (500295) will be excluded from cross margin computation from April 29, 2026, end of day
- Weightages for other index constituents will remain unchanged at the time of exclusion
- Revised index weightages will be published based on Vedanta Limited’s closing price on April 30, 2026
- Revised weightages become effective from May 5, 2026, begin of day
- Members must sync their portfolios to revised weightages by May 4, 2026, end of day
- Spread margins for NIFTYNXT50 and SX40 Index portfolios will increase from 25% to 30% during the transition period (April 29 to May 4, 2026)
Regulatory Changes
As a consequence of the corporate action (demerger) in Vedanta Limited (500295), ICCL is making the following changes to cross margin benefit computation:
- Temporary exclusion of Vedanta Limited from cross margin constituent weightages
- Recalculation and republication of index constituent weightages post-demerger
- Temporary increase in spread margins from 25% to 30% for NIFTYNXT50 and SX40 Index during the transition window (April 29 – May 4, 2026)
Compliance Requirements
- Members must note the exclusion of Vedanta Limited (500295) from cross margin computation effective April 29, 2026 end of day
- Members must monitor ICCL communications for revised weightage publication (expected after April 30, 2026 closing prices)
- Members must synchronize their portfolios as per the revised weightages by May 4, 2026, end of day
- Members should account for the increased spread margin (30%) for NIFTYNXT50 and SX40 Index portfolios during April 29 – May 4, 2026
For assistance or clarification, members may contact the Risk Department:
- Email: risk.iccl@icclindia.com / risk.monitoring@icclindia.com
- Phone: +91-22-22725186 / 5059 / 8811
Important Dates
| Date | Event |
|---|---|
| April 24, 2026 | Reference circular no. 20260424-33 issued |
| April 28, 2026 | This notice issued |
| April 29, 2026 (EOD) | Vedanta Limited excluded from cross margin computation; spread margins increase to 30% for NIFTYNXT50 and SX40 |
| April 30, 2026 | Closing price of Vedanta Limited used to calculate revised index weightages |
| May 4, 2026 (EOD) | Deadline for members to sync portfolios to revised weightages; end of elevated 30% spread margin period |
| May 5, 2026 (BOD) | Revised index weightages become effective |
Impact Assessment
Market Impact: The demerger of Vedanta Limited creates a structural change in index composition, requiring all cross margin positions referencing affected indices (NIFTYNXT50 and SX40) to be recalibrated. The temporary elevation of spread margins from 25% to 30% increases the margin requirement for portfolio-based positions during the transition, potentially triggering margin calls for members with leveraged cross-margin portfolios.
Operational Impact: Members with derivatives positions involving Vedanta Limited or indices containing Vedanta (NIFTYNXT50, SX40) face a tight operational window of approximately one week to update their risk systems and rebalance portfolios. Failure to sync portfolios by May 4, 2026 EOD may result in margin shortfalls when revised weightages go live on May 5, 2026.
Risk Consideration: The spread margin increase to 30% is a precautionary measure by ICCL to manage the elevated uncertainty in index constituent weightages during the demerger transition. Members should review their exposure to the affected indices and ensure adequate capital availability during this period.
Impact Justification
Directly affects cross margin computation and spread margin requirements for derivatives traders holding Vedanta Limited positions or index portfolios including NIFTYNXT50 and SX40, with tight compliance deadlines requiring portfolio rebalancing by May 4, 2026.