Whereas CBOE published the volatility index (VXO) in 1993 and declared the revision (VIX) in 2003, this event had exhibited us importance and non-solitary of such an index.

• 芝加哥选择权交易所(CBOE)于1993公布波动度指数(VXO)，并在2003又推出修正波动度指数(VIX)，说明了波动度指标的重要性与非唯一之特性。