Why is higher than usual margin blocked for my F&O trades close to expiry?
The margin blocked for your trades increases 4 days before expiry if you have open F&O positions which are required to be physically settled. You can check the increased margin requirement on our margin calculator.
Physical settlement means that you will have to give or take actual delivery of the underlying stock. As such, the required margin goes up in proportion to the contract value.
Learn more about physical settlement and higher margins in this article.