For a stock index option, the index value at which the buyer of the option can buy or sell the underlying stock index. The strike index is converted to a dollar value by multiplying by the option's contract multiple. Related: Strike price.
Copyright © 2012, Campbell R. Harvey. All Rights Reserved.
The strike price on an index option. An index option is a call or put option contract in which the underlying asset is an index of any sort. For example, in a call, an investor may buy the right to an index on or before the expiration date at a certain strike index. Obviously, one cannot buy or sell a physical index; so the underlying asset is said to be the dollar value of an index at a certain date and time multiplied by $100. Because physical delivery is not possible, when a stock index option is exercised, the delivery is the cash value of the strike index.
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