There have been three empirical studies examining the share price reaction following trades by directors of UK companies (King and Poell, 1988; Pope, Morris and Peel, 1990; and Gregory, Matatko, Tonks and Pukiss, 1994). All three of these UK studies used different definitions of 'buy' and 'sell' signals...

This paper reassesses the UK results of significant abnormal returns from directors trading for a new sample of directors trades 1984-1988, and finds that abnormal returns tend to be concentrated in smaller firms. When an appropriate benchmark portfolio is used, it is found that the significance...

This paper examines the patterns of security returns around trades by corporate insiders in the shares of their own company. We find patterns in abnormal returns in the days around a directors trade that are consistent with directors engaging in short-term market timing: they sell (buy) after an...

Previous work examined the long-run profitability of strategies mimicking the trades of company directors in the shares of their own company, as a way of testing for strong-form market efficiency. However, the evidence regarding returns during the month containing the insider trade was...