Bm. Barber et D. Loeffler, THE DARTBOARD COLUMN - 2ND-HAND INFORMATION AND PRICE PRESSURE, Journal of financial and quantitative analysis, 28(2), 1993, pp. 273-284
This study analyzes the effect of second-hand information on the behav
ior of security prices and volume using analysts' recommendations publ
ished in the monthly ''Dartboard'' column of the Wall Street Journal.
For the two days following the publication of the recommendations, ave
rage positive abnormal returns of 4 percent-nearly twice the level of
abnormal returns documented in previous research on analyst recommenda
tions-and average volume double normal volume levels on the two days f
ollowing publication of the recommendations are documented. The positi
ve abnormal return on announcement is partially reversed within 25 tra
ding days. The authors conclude that the positive abnormal return on a
nnouncement of the recommendations is a result of naive buying pressur
e as well as the information content of the analysts' recommendations.