Another January effect—evidence from stock split announcements

This paper examines whether there is a January effect in the propensity and abnormal returns of stock split announcements. It provides primary evidence in the investigation of using monthly effects to explain the patterns of stock splits. The results show that the January effect exists in the likelihood of the occurrence of share splits and in the associated short-term abnormal returns. We also find that another monthly effect—the Halloween effect—exists in stock split announcements. However, the January effect has a much larger and considerably more significant impact on the probability and returns of these announcements. The results of this paper shed light on why we observe patterns in the announcement of corporate events.