由两个有相同行使价的看跌和看涨期权形成的组合，同时二者都看跌，叫做组合卖出期货。
A combination of a put and a call with the same strike price, in which both are bullish, called synthetic long futures.
当期权的行使价非常接近标的资产的市价时，期权即处于平值状态。 平值期权实际上可以是处于略为价内或价外的状态。
An option is described as being at the money when the exercise price is approximately the same as that of the underlying instrument.
当期权的行使价非常接近标的资产的市价时，期权即处于平值状态。 平值期权实际上可以是处于略为价内或价外的状态。
An option is described as being at the money when the exercise price is approximately the same as that of the underlying instrument.
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