Study hints that alpha may be finite (at least in the short term)

Fascinating look (albeit not over a seriously long time frame) from AllAboutAlpha that is consistent with the long held economic view that if there are positive abnormal returns to be had (in financial or product markets), newcomers to market will drive down the returns (hence importance of barriers to entry etc).AllAboutAlpha.com» Today's Post » Study hints that alpha may be finite (at least in