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Investigators detected a tendency for those who excelled in one of Thurstone's seven primary mental abilities to also demonstrate high levels of competence in other abilities.This provided some evidence of
Variances of Returns
A statistical measure of the dispersion of returns for a given security or market index, often used to quantify risk.
Mean-Variance Efficient Portfolio
A portfolio constructed to have the highest possible return for a given level of risk, or equivalently, the lowest risk for a given level of expected return, according to Harry Markowitz's theory.
Firm-Specific Variances
Variability in a firm's stock price or returns that is attributable to factors unique to that firm, as opposed to general market factors.
Macroeconomic Factor
A wide-scale economic condition or variable that influences a broad economy and consequently affects individual businesses and financial markets.
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