The aim of the study is searching the relationships existence and its directions between investment funds flow and earnings of market stock in Turkey for the period of 2001:4-2011:2. Specifically, we investigate the possibility of a causality mechanism through which mutual funds flows may affect stock returns and vice versa. Time series techniques used for searching this relationship between variances. Primarily to state stagnancy Phillips-Perron unit stem text techniques used, then to state the longer period relationships existence between variances Johansen- Juselius test techniques used. Because of variances are observed as integrated, by considering the possibility of existence at least there is a one way causality between variances, Granger causality test was made. As a result, findings show that there is a relationship between investment funds flow and earnings of market stock by the way there isn’t a causality relationship between investment funds flow and earnings of market stock.