portfolio analysis, we often use ex post (historical) returns and standard deviations, despite the fact that we are interested in ex ante (future) data.

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Quizplus · Accepted Answer

This statement is true. While ex post returns and standard deviations are based on historical data, they are often used as a proxy for expected future returns and risk in portfolio analysis. However, it is important to keep in mind that past performance does not guarantee future results.

Portfolio Analysis, We Often Use Ex Post (Historical) Returns and Standard