542A COMPleTe gUIde TO THe FUTUreS MArKeT Other Spread Strategies Money spreads represent only one class of option spreads. A complete discussion of option spread strategies would require a substantial extension of this section—a degree of detail beyond the scope of this presentation. The following are examples of some other types of spreads. time spread. A time spread is a spread between two calls or two puts with the same strike price, but a diff erent expiration date. An example of a time spread would be: long 1 August $1,300 gold futures call/short 1 december $1,300 gold futures call. Time spreads are more complex than the other strategies discussed in this section, because the profi t/loss profi le at the time of expiration cannot be precisely predetermined, but rather must be estimated on the basis of theoretical valuation models. Diagonal spread. This is a spread between two calls or two puts that diff er in terms of both the strike price and the expiration date. An example of a diagonal spread would be: long 1 August $1,200 gold futures call/short 1 december $1,250 gold futures call. In eff ect, this type of spread combines the money spread and the time spread into one trade. butterfl y spread. This is a three-legged spread in which the options have the same expiration date but diff er in strike prices. A butterfl y spread using calls consists of two short calls at a given strike price, one long call at a higher strike price, and one long call at a lower strike price. The list of types of option spreads can be significantly extended, but the above examples should be sufficient to give the reader some idea of the potential range of complexity of spread Price of August gold futures at option expiration ($/oz) Profit/loss at expiration ($) 1,000 3,750 5,000 2,500 0 −1,250 −2,500 1,250 1,050 1,100 1,150 1,200 1,250 Breakeven price = $1,140.20 1,300 1,350 1,400 Futures price at time of position initiation FIGURE  35.21 Profi t/loss Profi le; Bear Put Money Spread (Short Put with lower Strike Price/ long Put with Higher Strike Price)