September Sees Reduced Price Movements in Closing Auctions
The Closing Auction Session (CAS) shows significant stabilization in September, with reduced price fluctuations and changes in trading patterns.
CAS price movements decreased from 0.32% in August to 0.27% in September.
Cash-market turnover fell by 4.5%, while derivatives turnover increased by 3.1%.
Three sessions accounted for 67% of September's auction turnover, highlighting key market events.
The Closing Auction Session (CAS), which has been under scrutiny since its introduction, has shown notable changes in its performance during September compared to August. Reports indicate that the regulatory body may consider halting the use of this mechanism for calculating derivatives settlement prices for at least a year. As the September series concludes, market participants appear to be adjusting to the CAS, leading to a more stable trading environment.
A recent analysis by Vtrender Technologies highlights three significant differences in the CAS performance between the two months. Firstly, the auction mechanism is now settling prices with less volatility. The distance between the reference price and the equilibrium price, which indicates how much the closing price is influenced by the auction, has decreased from 0.32% in August to 0.27% in September, marking a decline of 16.9%. Additionally, instances of stocks closing at the maximum price band of 3% have also diminished, dropping from 0.17% in August to just 0.03% in September.
In terms of market activity, the cash-market turnover averaged Rs 114,274 crore per session in September, a 4.5% decrease from the previous month's average of Rs 119,667 crore. Conversely, the derivatives segment experienced a rise in turnover, increasing by 3.1% to Rs 169,283 crore per session. The average number of stock futures contracts traded daily slightly decreased from 15.62 lakh in August to 15.50 lakh in September.
The auction turnover for September reached Rs 68,007 crore, up from Rs 63,630 crore in August. Notably, three trading sessions contributed to 67% of this total: the FTSE rebalancing on September 18, which generated Rs 16,613 crore, the Nifty semi-annual review on September 29 with Rs 24,504 crore, and Swiggy's shares exiting MSCI indices on September 4. The session on September 29 was particularly significant, marking the second-largest auction on record, coinciding with the monthly expiry of stock futures contracts.
Looking ahead, the market participants will be closely monitoring the implications of these changes in the CAS and their impact on trading strategies. As the regulatory body evaluates the effectiveness of the CAS, further adjustments may be anticipated in the coming months, particularly as market conditions evolve and new trading patterns emerge.
