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Universal Serial Bus connecters are used to connect input devices to computers.
Covariance
A statistical measure that indicates the extent to which two variables change together; if the covariance is positive, the variables move together, while a negative covariance means they move inversely.
Securities' Returns
The profit or loss derived from investing in a security, including dividends, interest, and capital gains.
Correlation Coefficient
The correlation coefficient is a statistical measure that calculates the strength of the relationship between the relative movements of two variables.
Portfolio Opportunity Set
The expected return–standard deviation pairs of all portfolios that can be constructed from a given set of assets.
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