High when a security moves swiftly up and down. In contrast, volatility is low when a security moves slowly up or down. Historical volatility (also known as realized volatility) is a recording of how the underlying really moved over a set time period, whereas implied volatility is a measure of what the options markets predict volatility will be over a given period of time (until the ... https://topcollegesadmission.in/college-list/mca/bhopal