We examine the wealth effects of earnings warning on rivals, and the warning industry’s supplier and customer industries. This study is based on a sample of 1,190 pre-announcements issued in 2006. Our results indicate distinct industry responses for good news and bad news. In good news disclosures, warning firms generate a dominant competitive (or negative) effect for rivals, suppliers and customers. Bad news disclosures elicit a contagion response (or negative) in returns. In addition, although cross-sectional tests show less consistent results, in good news disclosures, we find suppliers’ returns are negatively associated with warning firm’s market share, which supports buyer power hypothesis.