1 The OnStar Basic Plan is available for up to 5 years from the original delivery date on new, eligible 2014a model year and newerb vehicles and is transferable; and for three years for new subscribers of eligible 2011 model year or newer, OnStar-equipped, pre-owned vehicles.
DEFINITION of 'Standard Deviation'. 1. A measure of the dispersion of a set of data from its mean. The more spread apart the data, the higher the deviation. Standard deviation is calculated as the square root of variance.2. In finance, standard deviation is applied to the annual rate of return of an investment to measure the investment's volatility. measure of the dispersion of a set of data from its mean. The more spread apart the data, the higher the deviation. Standard deviation is calculated as the square root of variance. 2.
Portfolio return variance = , where = Portfolio return variance = Portfolio weights invested in Assets 1 and 2 = Standard deviations of returns for Assets 1 and 2 = Correlation between the returns on Assets 1 and 2. Consider two stocks with standard deviations of 20% and 25%, equal weights (0.50) in each stock, and a correlation between the stocksâ returns of 0.60. The portfolioâs variance would be. The portfolioâs standard deviation is the square root of the variance, or 0.202 = 20.2%.