do different volatility estimators exist? why does a volatility estimator exist what is the best estimate of volatility for a stock why are the different estimators for volatility different why do different volatility estimators exist? why do different estimators for stock volatility exist why does stock volatility exist why do different estimators exist? what is the best stock estimator why do different volatility estimators exist? what is the ava estimator for volatility what is the difference between a variance estimator and an estimater of the volatility of a stock which of the following is an example of a volatility estimator? why do different estimators for volatility exist how to determine whether a volatility estimator is a reliable one why does each estimator of a stock have different based ava? why do different estimators exist why do different estimators for volatility exist? why use different volatility estimators why do different estimators for stock volatility exist?