> The VIX index has been calculated by the Chicago Board Options Exchange (CBOE) since 1993.

It is often referred to as the fear index or the fear gauge. The VIX projects a range of the expected stock market volatility over the next 30-day period.

Hele, jak se nakupuje matematický konstruk strachu? Já nejsem žádný burzián a tohle si třeba vůbec neumím představit.