Markets Fall Over New Closing Price System: Why Traders Are Spooked
Indian stock markets experienced volatility following the introduction of a new Closing Auction Session (CAS) for price determination. Traders are concerned about the lack of real-time visibility and the impact on derivatives settlement.
Why it matters
Changes to market mechanisms can significantly affect liquidity and trader confidence, potentially leading to short-term market instability.
Stock Market Today: India's stock market indices had every reason to celebrate on Wednesday. Crude oil price eased, the Reserve Bank of India kept the repo rate unchanged at 5.25 per cent. The Sensex jumped around 450 points at one stage.But the mood changed quickly.By 2:23 pm, the Sensex was down around 125 points. The sharp turnaround came as traders continued to grapple with India's new system for determining closing prices.Share Market Today: What Has Changed?India introduced the Closing Auction Session (CAS) from August 3. Under the old system, the closing price was broadly calculated using the volume-weighted average price of trades during the final 30 minutes of regular trading.The new system works differently. For stocks that have futures and options contracts, regular trading ends earlier. A separate 20-minute closing auction then takes place. Buy and sell orders are collected and matched to arrive at a final price.The catch?
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