MSCI Rebalancing Tests India’s New $5 Billion Closing Auction

India’s recently implemented closing auction system is facing its most significant test as the quarterly rebalancing of MSCI Inc. indexes channels an estimated $5 billion in passive-fund trades through the market.

This substantial influx, with roughly $4 billion expected to pass through the Closing Auction Session (CAS), represents nearly 30 times the system’s typical daily turnover, according to Brian Freitas of Periscope Analytics, who noted the situation “could get pretty messy.”

Key Rebalancing Figures

• Total estimated passive-fund trades: $5 billion
• Expected flow through Closing Auction Session (CAS): Roughly $4 billion
• CAS flow compared to typical daily turnover: Nearly 30 times
• Anticipated outflow from Reliance Industries Ltd. weight reduction: Approximately $500 million

The rebalancing event places the Securities and Exchange Board of India’s (SEBI) market reform under scrutiny. Traders previously expressed concerns following a “flash crash” in the BSE Sensex during a recent 20-minute auction session, highlighting worries about thin liquidity and potential manipulation.

MSCI has confirmed it will monitor the “practical effectiveness” of India’s new auction system, taking into account feedback from market participants. Despite calls for modifications, SEBI Chairman Tuhin Kanta Pandey has reiterated that the new mechanism will remain in place, asserting its design aims to reduce tracking error for passive funds and align with global market practices.

Index Changes and Expected Flows

The latest MSCI review includes several additions and removals from its standard indexes, triggering significant portfolio adjustments for passive funds.

• Additions: Lenskart Solutions Ltd., Laurus Labs Ltd., Adani Energy Solutions Ltd., Billionbrains Garage Ventures Ltd.

• Removals: Balkrishna Industries Ltd., SBI Cards & Payment Services Ltd., Astral Ltd.

A reduction in the weight of Reliance Industries Ltd. is projected to generate approximately $500 million in outflows. While most passive funds are expected to utilize the auction window for execution, the sheer scale of the rebalance raises liquidity risks, particularly for less-traded stocks where absorbing large orders without significant price impact could prove challenging.

For such illiquid names, funds may need to execute trades during regular market hours, although index heavyweights like Reliance are anticipated to handle larger trades more smoothly due to deeper order books. The ongoing challenge remains attracting sufficient investor participation to provide liquidity, as institutions seek assurance of fairness and freedom from manipulation before fully engaging with the system.