i need to kow more about option selling…
Unlike buying options, where your risk is limited to the premium paid as the price cannot go beyond 0. The risk profile completely changes when you’re shorting options, this risk is unlimited as there is no limit to how much higher the prices can go. Hence the margin requirement is higher. You can learn more about SPAN and Exposure margin here.
Would also suggest you check out this module on Varsity to learn more about Options trading: