Expiry date refers to the date on which an option contract expires and becomes void. On this date, the option can no longer be exercised, and the contract becomes worthless. The expiry date is specified in the option contract and is usually the third Friday of the contract month for U.S. options. For futures contracts, the expiry date is the date on which the contract terminates and delivery of the underlying asset takes place.
Expiry price refers to the price at which an option contract settles on its expiry date. For call options, the expiry price is the price of the underlying asset at the close of trading on the expiry date. For put options, the expiry price is the strike price minus the price of the underlying asset at the close of trading on the expiry date. The expiry price is used to determine whether the option is in the money or out of the money at expiry, and therefore whether the option holder will exercise the option.