卖出看涨期权

投资者也可以卖出看涨期权（以预定价格购买的权利），但这种操作的风险更高，而且需要抵押。

You could also sell a call option , the right to buy at a set price , but that is riskier and requires collateral .

他们将能够卖出看涨期权，这样，如果价格在一个规定期限内达到一个既定水平，他们就必须卖出自己的股票。

They will be able to sell call options , under which they would have to sell their shares if the price reaches a predefined level within a set period .

但是中航油却出乎意料地选择了在30美元大量卖出无保护看涨期权，进行投机交易。

CAOSC , however , and surprisingly , heavily sells unprotected call options at US $ 30 for the purpose of speculation .

期权交易对供电公司购电组合的影响同时，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。

Effects of Options Trade on Purchasing Portfolio for Load Serving Entities ; Also , a combination of a long futures contract and a short call , called a synthetic short put .