PV（プロモーションビデオ）・MV（ミュージックビデオ）やライブ動画を無料で視聴できる-MyDo(マイ動画)音楽情報館

Arithmetic (mean) versus geometric (median) stock return について・・・

The expected return of a stock is ambiguous because, if we assume returns are normal, then price levels are lognormal. In which case, the mean does not equal the median future stock price.