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Variance rule |
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Variance 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.Variance rule Similar MatchesCovarianceCovarianceA 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. Mean variance analysisMean variance analysisEvaluation of risky prospects based on the expected value and variance of possible outcomes. VarianceVarianceA 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. Minimum variance portfolioMinimum variance portfolioThe portfolio of risky assets with lowest variance. VarianceVarianceA 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. Further SuggestionsVariance minimization approach to trackingComvariance Covariance Mean variance criterion variance Portfolio variance Minimum variance frontier Serial covariance |
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