https://en.wikipedia.org/wiki/Volatility
https://en.wikipedia.org/wiki/Volatility_(finance)
https://en.wikipedia.org/wiki/Volatility,_uncertainty,_complexity_and_ambiguity
https://en.wikipedia.org/wiki/Volatility_smile
https://en.wikipedia.org/wiki/Volatility_(chemistry)
TFEX: Thailand Futures Exchange - มุมผู้ลงทุน - ศัพท์การลงทุน