Do brokerage houses add value? The market impact of UK sell-side analyst recommendation changes

This paper reports on the first full study investigating the economic role of sell-side analysts' stock recommendations in the UK market. We also explore whether UK analysts are, in practice, influenced by the same biases as that reported for their US counterparts. We find that share prices are significantly influenced by analysts' recommendation changes, not only at the time of the recommendation change but also in subsequent months. The price reaction to new sell recommendations is greater than the price reaction to new buy recommendations and exhibits post-recommendation drift which is consistent with initial underreaction to bad news. Returns generated are influenced, cross-sectionally, by factors associated with a firm's information environment and analyst incentives such as size, same-sign earnings forecast revisions and recommendation changes that skip a rank. We find that UK analysts' investment recommendations in practice appear less susceptible to potential conflicts of interest than their US counterparts. The ratio of new sell to buy recommendations is higher in the UK and a greater proportion of such recommendations are accompanied by same-sign earnings forecast revisions than their equivalents in the US. We find brokerage house investment banking relationships do not appear to impact (adversely) on abnormal returns. © 2006 Elsevier Ltd. All rights reserved.