隐含波动性 Implied Volatility (IV) 定义： 股价的预测波动性。
用技术语言来说，期权价格的隐含波动性结果都要比实际波动性高。
To put this in technical terms, the implied volatility in the option price turns out to be higher than the realised volatility.
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.
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