Msci Rejig Drives Volumes In India Stocks Amid Closing Auction: led swings (updated)

Eternal

31/08/2026 12:35

NSE says closing auction turnover hits $4.1 billion, nearly 40 times average since launch
Reliance flips from 0.6% gain before auction to 0.8% loss at close
System applies only to F&O stocks, muting moves in Lenskart and Groww
Closing auction accounted for 21% of NSE cash-market turnover
Updates for markets close, rewrites throughout and adds fresh quotes
By Bharath Rajeswaran and Jayshree P Upadhyay
MUMBAI, Aug 31 (Reuters) - A quarterly MSCI rebalancing, seen as the first major stress test for India's new stock closing pricing system, drove about $4.1 billion of trades on the National Stock Exchange during the closing auction window on Monday.
The exchange said the turnover was nearly 40 times the average since the new closing auction was introduced earlier this month and represented 21% of cash-market volume, reflecting greater adoption after initial hiccups.
The closing auction is a roughly 20-minute auction during which buy and sell orders are matched to determine a stock's official closing price. Similar mechanisms are used in other global and Asian markets, including China, Taiwan, Hong Kong and South Korea.
An MSCI index rejig, which takes effect on September 1, spurred the higher interest in the auction, with the stock-specific flows triggering sharp price swings, traders said. 
MSCI added four Indian companies: Laurus Labs LAUL.NS, Lenskart LENS.NS, Adani Energy Solutions ADAI.NS and Groww BILO.NS to its global standard index, replacing Balkrishna Industries BLKI.NS, SBI Cards SBIC.NS, and Astral ASTL.NS. 
The reshuffle also reduced the weight for billionaire Mukesh Ambani's Reliance Industries RELI.NS and increased the weight for Eternal ETEA.NS.
"Flows-driven moves were always expected," said Anand James, chief market strategist at Geojit Investments, adding that volatility was restricted to a few stocks as is the case usually.
Reliance, which had risen 0.6% ahead of the closing auction, saw its indicative prices falling 1.6% during the closing auction, before settling 0.8% lower.
Eternal ETEA.NS erased intraday losses of 3% at close. Adani Energy ADAI.NS fell 10.4%. SBI Card SBIC.NS rose 0.6% and Astral ASTL.NS fell 0.7%. 
The new system currently applies only to stocks that have futures and options, leading to muted moves in Lenskart LENS.NS and Groww BILO.NS.
"MSCI-related flows are largely handled by foreign institutional investors familiar with closing auctions from other global markets, helping limit benchmark swings," said Tejas Shah, head of trading at Equirus Securities.
SHARP SWINGS
Since its introduction, the new closing auction has led to sharp swings, particularly on days when derivative contracts expire.
Last Thursday, the Sensex's indicative close pointed to a sharp 3.3% decline at one point during the closing auction session, which coincided with monthly derivatives expiry. The index later came off to close 0.7% lower.
       
     
         

 (Reporting by Bharath Rajeswaran and Vivek Kumar M in Bengaluru and Jayshree P. Upadhyay in Mumbai; Writing by Ira Dugal; Editing by Sherry Jacob-Phillips and Mrigank Dhaniwala)
 ((Ira.Dugal@thomsonreuters.com; +91-9833024892;))