LaPorta, RafaelLakonishok, JosefShleifer, AndreiVishny, Robert2017-03-081997LaPorta, Rafael, Josef Lakonishok, Andrei Shleifer, and Robert Vishny. 1997. Good News for Value Stocks: Further Evidence on Market Efficiency. Journal of Finance 52, no. : 859-874. doi: 10.1111/j.1540-6261.1997.tb04825.x0022-1082http://nrs.harvard.edu/urn-3:HUL.InstRepos:30725119This paper examines the hypothesis that the superior return to so-called value stocks is the result of expectational errors made by investors. We study stock price reactions around earnings announcements for value and glamour stock over a 5 year period after portfolio formation. The announcement returns suggest that a significant portion of the return difference between value and glamour stocks is attributable to earnings surprises that are systematically more positive for value stocks. The evidence is inconsistent with a risk-based explanation for the return differential.en-USJournal Article2017-03-0810.1111/j.1540-6261.1997.tb04825.x