Index options are financial instruments that give investors the right, but not the obligation, to buy or sell an underlying stock index at a predetermined price before the option expires.

It compares the number of put options to the number of call options traded

Options are contracts that grant you the right but not the obligation to sell or purchase an underlying asset like stocks at a predetermined price on or before a certain date.

In India, more than 90 per cent of the trading is done in the derivatives segment. However, the fun fact is that most of the traders lack knowledge about it.  

Activity in the F&O market for the weekly expiry on May 5 shows 17300 to act as support now. 

Activity in the F&O market for the weekly expiry tomorrow shows 17000 to act as support now.