Examlex
The two spacecraft constantly observing the Sun are _ _ and .
Alpha Coefficient
A measure of the performance on a risk-adjusted basis of an investment portfolio, indicating excess return over the benchmark.
Beta Coefficient
A measure of the volatility, or systematic risk, of a security or a portfolio compared to the market as a whole.
Nonsystematic Variance
The variability in a security's or a portfolio's returns that is not related to overall market movements.
Market Index
A method or metric to measure the performance of a group of stocks, representing a particular market or sector, to give investors a snapshot of its overall health.
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