Gruber (1996) and Zheng (1999) report that investors channel money toward mutual funds that subsequently perform well. Sapp and Tiwari (2004) find that this “smart money” effect no longer holds after controlling for stock return momentum. While prior work uses quarterly U.S. data, we employ a British data set of monthly fund inflows and outflows differentiated between individual and institutional investors. We document a robust smart money effect in the United Kingdom. The effect is caused by buying (but not selling) decisions of both individuals and institutions. Using monthly data available post‐1991 we show that money is comparably smart in the United States.

We compare the long run reaction to anticipated and surprise information announcements using stock splits. Although there is underreaction in both cases, anticipated splits are treated differently to those that are unforeseen. After anticipated splits, cumulative abnormal returns peak at one-and-a-half times the level observed after unanticipated splits although the time taken for the announcement to be absorbed into prices is the same. We explain the difference in underreaction by the degree to which split announcements are believed and hence invested in. The favorable signal conveyed in forecast splits is more credible owing to their better pre-split performance, resulting in a far more pronounced underreaction effect.