mumbai, Aug. 20 -- A committee set up by the capital markets regulator has discussed a proposal to introduce an intraday net exposure limit of Rs.1,500 crore on the expiry day of weekly options like Nifty and Sensex to curtail outsized positions and frenzy in trading, according to three people aware of the matter. The discussions of the Secondary Market Advisory Committee (SMAC) on Tuesday came after the Securities and Exchange Board of India (Sebi) cracked down on US-based hedge fund Jane Street for alleged manipulation of Bank Nifty and Nifty to make outsized gains in options trading on these two indices. Sebi in an interim order on 3 July said the gains were at the cost of losses borne largely by retail clients. Jane Street has deposited...