Archive · 3 Aug 2026
India Introduces Closing Auction, Impacting Arbitrage Funds
India is changing how it ends its stock trading day.
Instead of trading for 30 minutes, it will now hold a 20‑minute auction to set the final price.
This will make prices steadier and help big investors trade more easily.
Some traders who make money from quick price changes might earn a little less.
Brokers may also see a small drop in their earnings.
Overall, the new system is meant to make the market fairer and more like other countries’ markets.
India will hold a 20‑minute closing auction for stocks with derivatives, starting Monday.
The auction will cap price swings within 3% of the 3:15 p.m. reference price, shortening the trading day by 15 minutes.
Arbitrage funds may lose 10‑15 basis points of returns, with industry returns falling to 5.8% in the past year.
Brokerages such as Zerodha expect a 1‑5% drop in brokerage income due to the change.
Regulators anticipate the auction will improve price discovery and attract institutional investors.
- Who
- Arbitrage funds, brokerage firms, and market regulators
- What
- Implementation of a 20‑minute closing auction for stocks with derivatives
- When
- Starting Monday (exact date not specified)
- Where
- Indian stock exchanges
- Why
- To reduce last‑minute volatility, improve price discovery, and align India’s market structure with global peers
- Closing auction duration
- 20 minutes
- Reference time
- 3:15 p.m. Mumbai time
- Price cap
- within 3% of reference price
- Industry impact
- 10-15 basis points reduction for arbitrage funds
- Brokerage impact
- 1-5% revenue drop
- Market structure goal
- align with global peers