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International Economic Review

Опубликовано на портале: 19-11-2007
Eugene F. Fama, Lawrence Fisher, Michael C. Jensen, Richard Roll International Economic Review. 1969.  Vol. 10. No. 1. P. 1-21. 
There is an impressive body of empirical evidence which indicates that successive price changes in individual common stocks are very nearly independent. Recent papers by Mandelbrot and Samuelson show rigorously that independence of successive price changes is consistent with an "efficient" market, i.e., a market that adjusts rapidly to new information. It is important to note, however, that in the empirical work to date the usual procedure has been to infer market efficiency from the observed independence of successive price changes. There has been very little actual testing of the speed of adjustment of prices to specijc kinds of new information. The prime concern of this paper is to examine the process by which common stock prices adjust to the information (if any) that is implicit in a stock split
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