Do UK Security Analysts Over-react?

Abstract

Abstract Consensus analysts' earnings per share forecasts have become increasingly accessible in recent years and such measures have been widely adopted by academics as proxies for the market's expectations of earnings. Some US studies have suggested that analysts, in revising earnings forecasts, are prone to over-reaction. This study tests for evidence of over-reaction in revisions of the consensus earnings per share forecasts of UK companies reported by the Institutional Brokers Estimate System. For a series of periods, portfolios of companies attracting high and low revisions of earnings forecasts are constructed. We then compare the subsequent earnings forecast of the companies which attracted high revisions in the portfolio formation period with those of the companies which attracted low revisions in the portfolio formation period. We also compare actual changes in annual earnings with forecast changes in annual earnings. Both analyses suggest that UK analysts are prone to under-reaction, a finding which contrasts with the US studies which have identified over-reaction. There is little evidence that the market, in reacting to earnings forecast revisions, fails to recognise this under-reaction.