This study examines how financial disclosures with earnings announcements affect sell‐side analysts' information about future earnings, focusing on disclosures of financial statements and management earnings forecasts. We find that disclosures of balance sheets and segment data are associated with an increase in the degree to which analysts' forecasts of upcoming quarterly earnings are based on private information. Further analyses show that balance sheet disclosures are associated with an increase in the precision of both analysts' common and private information, segment disclosures are associated with an increase in analysts' private information, and management earnings forecast disclosures are associated with an increase in analysts' common information. These results are consistent with analysts processing balance sheet and segment disclosures into new private information regarding near‐term earnings. Additional analysis of conference calls shows that balance sheet, segment, and management earnings forecast disclosures are all associated with more discussion related to these items in the questions‐and‐answers section of conference calls, consistent with analysts playing an information interpretation role with respect to these disclosures.

ABSTRACT This study examines the effect of product market competition on managerial disclosure of earnings forecasts using large reductions in U.S. import tariff rates to identify an exogenous increase in competition for domestic firms in U.S. product markets. Our difference-in-differences estimations show that tariff reductions are associated with a significant decrease in management forecasts of annual earnings by U.S. domestic firms. Further, this decrease is more pronounced when the tariff rate reduction triggers a greater increase in imports and when the forecasts are likely to incur higher proprietary costs. Our findings are consistent with competition from existing rivals reducing voluntary disclosure through increased proprietary costs.