India Tightens Options Rules Again After Jane Street Saga (1)

India’s securities regulator is imposing further restrictions on equity-index options trading in a bid to curb speculation, just months after its crackdown on Jane Street Group for alleged manipulation.

Starting Oct. 1, the Securities and Exchange Board will cap intraday positions at 50 billion rupees ($567 million) in futures-equivalent terms on a net basis, a circular published on the regulator’s website on Monday showed. Until now, there had been no limit.

The measures are the latest in a string of curbs aimed at cooling India’s options boom and checking alleged market manipulation. In July, SEBI temporarily banned Jane Street, alleging ...