投资者为什么出售期权？
在市场平静的时候，愿意出售期权的人增加，使它们的价格，也就是隐含波动性的等级下降。
In quiet markets, the number of people who want to sell options increases, driving their prices, and thus the level of implied volatility, down.
他们会卖出期权，出售承担极端市场风险的保险以赚取保险费。
They will write options, earning premiums for selling insurance against extreme market movements.
应用推荐