A European put option grants the holder the right to:

		buy the underlying security at a stated price at any time up to and including the expiration date.
		sell the underlying asset at the strike price only on the expiration date.
		sell the underlying security at the strike price on or before the expiration date.
		buy the underlying asset at the exercise price on the expiration date.
		buy the underlying asset at or below the exercise price on or before the expiration date.