Examlex
Part of the courting behavior of male jumping spiders consists of drumming the ground with their legs.Studies have shown that leg drumming decreases the longevity of the spiders.Why might male leg drumming have evolved in jumping spiders?
Jensen's Measure
A performance evaluation measure that calculates the excess return a fund generates over its expected return, given its level of risk.
Risk-Free Return
The theoretical return on an investment with no risk of financial loss, often represented by the yield on government securities such as U.S. Treasury bonds.
Beta
A measure of a security's volatility in relation to the overall market; a beta greater than 1 indicates greater volatility than the market.
Bogey Portfolio
A benchmark portfolio against which the performance of an investment portfolio is measured, often used to assess the skill of portfolio managers.
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