price sensitivity of options, The Greeks: delta, gamma, theta, rho, vega, volatility risk, vega risk, risk of risk, continuous dividend, volatility, historical volatility, realized volatility, implied volatility, daily volatility, weekly volatility, monthly volatility, annual volatility, annualized volatility, lognormal distribution, stable distribution, distribution moments, kurtosis, fat tail, fat-tail risk, Black Swans