New Delhi, April 29 -- Shares of the Bombay Stock Exchange (BSE) experienced a significant decline of up to 18% on Monday, marking the biggest single-day drop since its listing in 2017. The stock came under scrutiny following a directive to pay regulatory fees to market regulator SEBI based on the annual turnover calculated from the 'notional value' of its options contracts. BSE had computed the annual turnover using the premium value for options contracts.

leading to an obligation to pay the differential regulatory fee for previous periods along with accrued interest. As per the directive, BSE is required to pay a differential fee amounting to Rs 165 crore. This includes Rs 69 crore for the financial years 2007 to 2023, and Rs 96 crore fo...