“…Prior research on information transfer provides evidence consistent with a positive relation between the unsystematic stock returns of announcing and non-announcing firms at earnings releases ( Foster, 1981;Clinch and Sinclair, 1987;Baginski, 1987Baginski, , 1989Freeman, R. N. and Tse, S.,1992;Han et al, 1989;Han and Wild, 1990;Pownall and Waymire, 1989;Pyo and Lustgarten, 1990). Those results suggest that news releases of other firms within an industry are used in the determination of a given firm's security price.…”