Answer lies in pre-open call auction, which is a 45-minute window for price discovery
While, DMart is not the first company whose stock has doubled on listing day—there have been at least eight other companies— but it is the first since market regulator Securities and Exchange Board of India (Sebi) introduced listing day circuit filters.
To curb listing day volatility, Sebi in 2012 introduced circuit filters and the so-called pre-open call auction for IPO stocks. Depending on the size of the Initial Public Offer (IPO), stocks were allowed to move in a trading band of either 10 per cent or 20 per cent on their listing day.
In case of DMart, the equilibrium price was Rs 604, 102 per cent higher than the issue price of Rs 299. The 20 per cent circuit filter in case of DMart was on the discovered price. Therefore, trading would have halted in the counter if the stock would have gone to either Rs 725 or Rs 483.| READ MORE