The market’s use of supplier earnings information to value customers

In this paper we examine whether the quarterly earnings announcements of supplier firms contain information about their customer’s earnings. Our evidence suggests that they do. Specifically, we find evidence consistent with the market impounding supplier firm earnings information into the stock prices of the firm’s customers. This is consistent with the market using the supplier’s earnings to help assess the customer firm’s future cash flows and/or uncertainty of those cash flows. We also find that the quality of the earnings influences the magnitude of the customer firm’s stock price reaction. The customer’s stock price reaction is increasing in the revenue growth reported by the supplier and the past persistence of the supplier’s earnings. Additional tests reveal that the market reaction is amplified when the customer firm is more dependent on the supplier. Finally, we find that the relative bargaining power of the customer influences the market reaction to supplier earnings. While prior research has documented that the market uses industry peer earnings and customer earnings in pricing a firm’s stock, this is the first study to provide evidence on the market’s use of supplier earnings information.