MATLAB Function for Calculating Stock Historical Volatility: securityVolatility.m

The MATLAB function securityVolatility.m serves as a robust computational tool for determining historical volatility of stocks. This function implements standard financial mathematics algorithms to calculate volatility based on historical price data, typically using logarithmic returns and annualization factors. Beyond providing precise volatility measurements for individual securities, the function incorporates portfolio analysis capabilities that allow investors to assess aggregate risk exposure across multiple assets. The implementation includes customizable parameters for lookback periods, return calculation methods, and volatility annualization, making it adaptable to various investment strategies. The function employs vectorized operations for efficient computation and includes error handling for data validation. Whether for experienced quantitative analysts or beginners in financial programming, securityVolatility.m offers essential functionality for effective portfolio risk management and return optimization through proper volatility assessment techniques.