We present an economic mechanism and supportive empirical evidence for the transmission of information between equity securities first documented by Lo and MacKinlay (1990). It is argued that the past returns on stocks held by informed institutional traders will be positively correlated with the...

In a rational expectations framework under the assumption that the stock market is segmented because of legal restrictions, it is demonstrated that the returns of large firm stocks are predictors of small firm stock returns. Empirical tests supporting this prediction are also presented.