India’s New Closing Auction: Trader Distress & SEBI Probe

India’s new auction-based system for determining end-of-day stock prices, implemented on August 3rd, has caused significant distress among traders. This new mechanism has led to unexpected price volatility and limited liquidity across the market.

The Securities and Exchange Board of India (SEBI) is currently investigating allegations of manipulative trading practices. These allegations involve several firms, including a unit of JPMorgan, highlighting the immediate challenges faced by the system’s rollout.

Understanding the New Auction Mechanism

The system’s design incorporates specific timings for order collection and price publication. This structure aims to centralize liquidity and enhance price discovery in the market.

Order Collection: Buy and sell orders are gathered between 3:15 p.m. and 3:35 p.m. daily.

Price Publication: The official closing price for the day is published immediately after this 20-minute window closes.

Derivatives Trading: A critical temporal mismatch exists as derivatives trading extends until 3:40 p.m., creating a gap after the closing price is determined.

Market Impact and Institutional Reluctance

This temporal mismatch has created a ‘chicken-and-egg’ scenario within the market. Institutional investors are notably reluctant to participate due to the shallow trading environment and persistent liquidity issues.

The new system was initially proposed by SEBI in 2024 with the explicit goal of making it more difficult to influence benchmark prices. However, the immediate consequences include increased uncertainty surrounding official closing prices and difficulties in real-time position hedging for market participants.

While similar auction systems in other developed markets initially experienced price swings and operational hurdles, they eventually matured. India’s market is now navigating these initial challenges following its recent implementation.