- Indian stock exchanges have launched a new Closing Auction Session aimed at improving price discovery.
- Following the launch, brokerages have begun advising retail clients to square off their equity positions by 3 PM due to confusion over price discovery.
- The Nifty 50 fell 0.58% to 24,629.70 as the mechanism-led surge unwound, reversing part of the previous session's sharp rise.
- Market participants noted that the divergence between cash and futures prices was evident, prompting brokers to recommend early exits.
- Under the new framework, continuous trading in the cash market ends at 3:15 PM, followed by a 15-minute auction to determine the closing price.
- The National Stock Exchange reported that on the first day of the CAS, 515 trading members participated, placing orders for 56,773 unique PANs.
- Despite the initial participation, the outcome of the first trading session did not meet expectations, leading to unusual price movements and confusion among market participants.
Brokers are urging retail clients to square off their positions by 3 PM as the new Closing Auction Session (CAS) has led to significant cash-futures divergence. This advisory follows a chaotic first day of trading, where the cash market settled at a premium to futures prices after 3:15 PM.1245
Under the new framework, continuous trading in the cash market ends at 3:15 PM, transitioning into a 15-minute auction to determine closing prices. However, this has resulted in confusion and unusual market behavior, prompting brokers to prioritize execution certainty for their clients. “There is too much uncertainty at the moment,” said a senior brokerage executive, emphasizing the need for clients to avoid open positions during the auction.
The National Stock Exchange (NSE) reported that 515 trading members participated in the CAS, placing orders for 56,773 unique PANs, indicating a strong initial response. However, market participants noted that the divergence was evident across several stocks, reflecting separate price discovery in the cash market auction while derivatives continued trading until 3:40 PM.6
The Nifty 50 index fell 0.58% to 24,629.70, reversing gains from the previous session, as analysts warned of potential volatility as the market adjusts to the new mechanism. “Such price aberrations are not unusual when a new trading mechanism is introduced,” said Kranthi Bathini, director of equity strategy at Wealthmills Securities.3
The episode has sparked debate over the policy direction, with brokers arguing that the new framework effectively shortens the trading window for cash-market investors, while derivatives continue trading for another 25 minutes.
“NSE said 515 trading members placed orders for 56,773 unique PANs on day one, versus 403 members and 42,822 PANs in the pre-open session. Uttam Bagri, Managing Director of BCB Brokerages, said the session's success depends on participation from institutional investors, arbitrageurs and liquidity providers.”
