This delta-based OI has been a recent change; earlier, it was notional. While today a trader’s limits are based on delta, the broker’s limits are still not based on delta.
Until delta-based OI was brought in, people were essentially taking a lot of positions in deep OTM calls or puts to get around this Rs 500 cr limit.
@nithin
I believe SEBI set the 15% OI limit after careful consideration.
Since buying ITM or deep OTM options and holding them overnight habits are the same across the industry, why is only zerodha struggling to stay within SEBI’s 15% OI threshold?
There must be more to the story…, so matter of investigation/discussion.
Don’t know the truth but Zerodha’s explanation about people not able to buy otm options due to OI over shooting was never convincing. Even during those times people as the questions about why other brokers were not facing that issue on which no convincing explanation was given…
This is actually the first time I’m hearing about the 15% OI limit per broker.
I tried digging into this a bit more but couldn’t find any clear limitations for exchanges around concentration risk. NSE today handles most of the derivatives volume and a large share of cash market as well.
And how did the market structure evolve to a point where we effectively have only two exchanges, with one dominating most segments?