The mean is the arithmetic average and represents the central value of a dataset. In financial analysis, it summarizes an asset’s average price or return over a selected period, providing a baseline for comparison. section 3.4.2
Comparing mean returns
A Python summary groups mean, standard deviation, and variance for Apple, Coca-Cola, and NuScale. The reported mean log returns are 0.442217, −0.035349, and −1.149094 respectively, showing how average performance differs across the three stocks. section 3.4.2
summary = log_rets_2023.agg(["mean", "std", "var"]).T summary.columns = ["Mean", "Std", "Var"] summary
Inspect the aggregation that calculates mean, standard deviation, and variance for each company. section 3.4.2
