卖方期权，是指期权持有人在期权有效期内按履约价格卖出（但不负有必须卖出的责任）规定的资产的权利。 。
Putt option refers to the right given to the option holder to sell (not the liability to sell) an asset at a specified price within specific time period.
买方期权，是指赋予期权持有人在期权有效期内按履约价格买进(但不负有必须买进的义务)规定的资产的权利。
Call option refers to the right given to the option holder to buy (not the liability to buy) an asset at a specified price within specific time period.
如果股票价格超过预定价格或是履约价格，期权的价值就会飙升。
Options can soar in value if the stock price rises above the set purchase, or strike, price.
看跌期权亦为一种协议，在该协议中，买方有权（但非义务）以履约价格在未来某日或未来某日之前出售某一资产；
A put option is an agreement in which the buyer has the right (but not the obligation) to exercise by selling an asset at the strike price on or before a future date;
看跌期权亦为一种协议，在该协议中，买方有权（但非义务）以履约价格在未来某日或未来某日之前出售某一资产；
A put option is an agreement in which the buyer has the right (but not the obligation) to exercise by selling an asset at the strike price on or before a future date;
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