Beta, represented by the Greek lowercase letter β ... the Apple-S&P 500 Index example above showed that with Apple’s beta at 1.1727, the stock has above-average volatility.

The measurement of the volatility depends on the particular situation. For example, one could calculate the realized volatility for the equity market in March of 2003 by taking the standard ...

characterized by extended periods of extreme calmness followed by bouts of extreme volatility," said the third quarter investor letter from Highbridge. According to Highbridge there are two ...