同时，买进期货合同和卖出一个看涨期权的组合，叫做组合卖出看跌期权。
Also, a combination of a long futures contract and a short call, called a synthetic short put.
比如说，一个看涨期权，可以让持有者有权在一段特定的时间内以一个特定的价格买入一个资产。
A call option, for example, gives the holder the right to buy an asset at a specified price within a specified period.
这么多年来我还发现，在纳斯达克综合指数达到我的卖出下限时，卖出我已经持有的股票的看涨期权也是一个行之有效的策略。
Over the years I've found it's also an effective strategy to sell calls on stocks I already own when the Nasdaq Composite hits one of my selling thresholds.
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