Process of weighing the total expected costs vs. the total expected benefits of one or more activities in order to choose the best or most profitable option.
对一各或多个活动的预期总成本及预期总收益对比的评估过程，以做最佳或者利润最高的选择。
To be profitable, though, at expiration, the stock must be trading for more than 58, the total of the option premium (8 1/2) and the strike price of 50.
当然，要想在到期前真正有利可图，该股票的交易价格必须高于58 1/2，也就是期权溢价（8-1/2）加上商定价格50。
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