Random Variation Is One of the Four Different Components of a Time

question 222

True/False

Random variation is one of the four different components of a time series.It is caused by irregular and unpredictable changes in a time series that are not caused by any other component.It tends to mask the existence of the other more predictable components.

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Definitions:

Single Index Model

A simplified model to estimate the return of a security based on the return of the market as a whole and the security's sensitivity to the market.

Portfolio's Sigma

A statistical term that represents the standard deviation of returns of an investment portfolio, reflecting its risk.

Mean-Variance Efficient Portfolio

A portfolio construction theory that suggests the best investment portfolio is one that offers the highest expected return for a given level of risk or the lowest risk for a given level of expected return.

Single-Index Structure

A portfolio model that relates the returns on each asset to a single market index.