Vix的长期图像也暗示着周期性，1990s的早期和末期呈现大量的波浪，夹在中间的90年代中期却是一段相对平静的时期。
A long-term graph of the Vix hints at cyclicality, with periods of great choppiness in the early and late 1990s book-ending an era of relative calm in the middle of the decade.
Vix的长期图像也暗示着周期性，1990s的早期和末期呈现大量的波浪，夹在中间的90年代中期却是一段相对平静的时期。
A long-term graph of the Vix hints at cyclicality, with periods of great choppiness in the early and late 1990s book-ending an era of relative calm in the middle of the decade.
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