Historical Volatility Ratio
Volatility is an integral part of risk management. It is usually termed with standard deviation often used as a dispersion measure. The higher the dispersion, the higher would be your risk. This should be clearly understood by every businessperson. The market keeps changing and so does the cycle. Volatility is often associated with value at risk and is the common factor used for measuring risk. |
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In case you want to examine risk, understand that upward and downward price movement are equally important. In case you want to calculate the historical volatility, you need to follow the necessary steps. Firstly, calculate the periodic return like your daily returns and then choose any scheme that fits well with the returns.
Let us consider Ui as stock return followed by ‘Si’ as price .In case, you have any dividend kindly add it to the present stock price. Hence the following formula can be derived to estimate the percentage. Hence the output would be Ui= Si-(Si-1)/(Si-1). However, this percentage return does not necessarily be as profitable as the compounded return. Over a longer period of time, the compounded return would be affected by time. In case, you want to calculate price volatility the following formula can be derived as Ui= ln (Si/Si-1).You can go through various books to learn the calculating procedure and apply the same while figuring the volatility rate.
Historical volatility calculates and measures price changes over a period of time in case you want to be away from mean and average value. The historical volatilities if falls under 52-54 percent, indicates that the stock will change from its present price in case the volatility rate remains stable. This method will enable you to look at uncertainties with ease.
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