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Variance |
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VarianceA measure of how much an economic or statistical variable varies across values or observations. Its calculation is the same as that of the covariance, being the covariance of the variable with itself.VarianceThe difference between budgeted and actual costs.VarianceA measure of dispersion of a set of data points around their mean value. The mathematical expectation of the average squared deviations from the mean. The square root of the variance is the standard deviation.Variance Similar MatchesVariance ruleVariance ruleSpecifies the permitted minimum or maximum quantity of securities that can be delivered to satisfy a TBA trade. For Ginnie Mae, Fannie Mae, and Freddie Mac pass-through securities, the accepted variance is plus or minus 2.499999 % per million of the par value of the TBA quantity. CovarianceCovarianceA measure of the extent to which two economic or statistical variables move up and down together. For two variables x and y with values xi, yi, i=1,…,n, the covariance is cov(x,y) = Si=1…n(xi-m(x))(yi-m(y)), where m(·) is the mean of the values in its argument. Portfolio variancePortfolio varianceWeighted sum of the covariance and variances of the assets in a portfolio. Variance minimization approach to trackingVariance minimization approach to trackingAn approach to bond indexing that uses historical data to estimate the variance of the tracking error. CovarianceCovarianceA statistical measure of the degree to which random variables move together. A positive covariance implies that one variable is above (below) its mean value when the other variable is above (below) its mean value. Further SuggestionsMinimum variance frontierMinimum variance portfolio Mean variance criterion Comvariance Mean variance analysis Serial covariance |
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