We study the implications of interfirm product market linkages for dependence among the daily stock returns of US publicly traded firms using a spatial econometric regression. The effects of rivals and major customers change with various characteristics related to the product market network. We...

We model the immediate responses of firms’ daily idiosyncratic stock returns to the idiosyncratic returns of the firms’ rivals, using spatial econometric techniques. Contagion effect of rivals dominates competitive effect, and the net effect is larger when firms respond to negative return...