Volatility Index, a popular measure of the stock market's expectation of volatility based on S&P 500 index options. It is calculated and disseminated on a real-time basis by the CBOE, and is often referred to as the fear index or fear gauge.

rhs 既terms 完全係可以quantified 定義清楚,如果你咁都唔同意我幫你唔到
Fear index只係一個慣稱,本身用條equation 計數唔需要先定義咩係fear。
叫VIX 做fear index 既意思係因為市場對未來既stock price 更加uncertainty 可以由呢個index 既movement睇到。
如果將fear in the stock market 理解做= expectation of volatility (而volatility可以由上面堆野計出嚟 ),rhs 既terms 完全係可以quantified 定義清楚,如果你咁都唔同意我真係幫你唔到
塞錢落你袋,學多樣嘢唔好再咁大聲做井底之蛙喇
喂你仲未答我,有冇一種動物識得整個stock exchange 出黎幫人集資,再用stock price calculate expected volatility 啊?
