Return Distributions and Statistics

Free CAIA Level I lesson in Introduction to Alternative Investments. 30 min read, ~4,478 words.

Four moments in order: mean, variance, skewness, kurtosis: variance is the second moment, not standard deviation. Correlation = covariance / (SD_A x SD_B): always between -1 and +1; covariance has no bound. Log returns and the lognormal distribution fix simple returns' -100% floor problem: log returns can be normally distributed...

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