India faces regulatory pushback on stock auctions
India’s shift to auction-based closing prices for derivatives hits its biggest test yet on Tuesday, when traders face the first monthly expiry under the new mechanism. The system, which launched on August 3, has already drawn regulatory scrutiny after the Securities and Exchange Board of India barred two firms — including a unit of JPMorgan Chase & Co. — for allegedly manipulating prices during the auction.
Weekly expiries have operated under the new rules without major disruption. Tuesday’s event is a larger undertaking. It brings physically settled single-stock options into the mix, and the auction-generated closing price determines which contracts finish in the money. “A weekly index expiry is one thing, but a monthly expiry brings stock futures and options into the equation, making the closing price much more consequential,” said Kruti Shah, a quantitative analyst at Equirus Securities.
The stakes are higher for a simple reason. A sharp move in a stock during the auction can flip an option that was set to expire worthless into one that requires delivery. Because these contracts are physically settled, investors may suddenly need to produce shares or cash. “One move can change the settlement completely,” said Maurya Ghelani, a derivatives strategist at Kai Securities in Mumbai.
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The mechanism has had a difficult start. Many proprietary trading firms and high-frequency traders have stayed away, contributing to thinner volumes during the auction window. Arbitrageurs have also lost some of their most profitable opportunities because the late-session period for trading stocks and derivatives simultaneously has narrowed.
SEBI has previously flagged the delivery risk tied to the system. It extended derivatives trading beyond the auction, giving investors more time to adjust positions once the closing price becomes clearer and delivery obligations are known. The design was intended to bring India in line with major global markets. The transition, so far, has been bumpier than expected. The coming weeks will show whether the auction can hold up under the weight of monthly expiries, or whether regulators need to step in again.
The operational burden of these changes is felt acutely by those accustomed to previous settlement styles. By tying the fate of individual company derivatives to the specific auction-generated price, the current framework forces a more rigid adherence to the closing snapshot. Participants who fail to account for the potential for sudden price swings during this window risk finding themselves on the wrong side of a mandatory share transfer or cash payment requirement. The regulatory action taken against market participants last week serves as a warning that the authorities are monitoring the integrity of this window closely. With the first monthly cycle now underway, the market is effectively operating in uncharted territory regarding the stability of the auction process. The need for precise execution is vital, as the transition to global standards has introduced new variables that traders must handle to avoid the pitfalls of unintended physical delivery obligations.
