Reading 71: Option Markets and Contracts-LOS h 习题精选

When the holder exercises a futures option, he receives an underlying futures position. The cash payoff is the value the holder gains when that position is marked to market. Thus, the payoff is the difference between the exercise price and the futures contract price. Although it certainly influences the futures price, the spot price of the underlying commodity does not enter into the calculation of the payoff on the option.

The long position in an interest rate call option receives cash if the reference rate is greater than the strike rate, but does not receive it at expiration. The term of the reference rate (for example, 90-day LIBOR) determines the length of time after expiration when the cash changes hands. Options that pay at expiration pay the present value of the amount described. Determining the payoff on a stock index option requires the index level, the exercise price, and the contract multiplier. The strike price is another name for the exercise price.

An interest rate call pays zero or the market rate at expiration minus the exercise rate. Since the payment is made at a date after expiration by the period of the reference rate, the value at expiration is the present value of this difference times the principal value.

The payoff on an interest-rate option is made after expiration by the period of the reference interest rate, e.g. 90-day LIBOR or 180-day LIBOR. Bond option values go down when interest rates increase; interest rate option values go up when the underlying rate increases.

If LIBOR at expiration is less than the strike rate, the interest rate call option expires worthless.

If the stock price is greater than the strike price at expiration, the payoff to a call option on the stock equals the stock price minus the strike price, while a put option on the stock expires worthless.