The Tuesday expiry has worked in favour of the National Stock Exchange (NSE ) in September as its market share in the derivatives market increased to 61.9% after falling in the past four months.

The growth in the exchange’s average daily turnover sharply improved (14%) to `270 lakh crore in September. The growth was 3.3% and 5.4% in the previous two months.

Derivatives shift: NSE rises, BSE declines

Meanwhile, the BSE recorded a fall for the first time after three months. It declined 6.6% to Rs 166 lakh crore. The total turnover for both the exchanges from 22 trading sessions in September rose 22% month-on-month with the NSE at Rs 5,942 lakh crore and the BSE at Rs 3,651 lakh crore.

In May, the markets regulator issued a circular restricting expiries to just two days a week and a

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