We investigate the relation between the transparency of financial statements and the distribution of stock returns. Using earnings management as a measure of opacity, we find that opacity is associated with higher R2s, indicating less revelation of firm-specific information. Moreover, opaque firms are more prone to stock price crashes, consistent with the prediction of the Jin and Myers [2006. R2 around the world: new theory and new tests. Journal of Financial Economics 79, 257–292] model. However, these relations seem to have dissipated since the passage of the Sarbanes-Oxley Act, suggesting that earnings management has decreased or that firms can hide less information in the new regulatory environment.

Does enhanced regulatory transparency facilitate alignment of private and public enforcement? Utilizing the SEC's 2004 decision to publicly disclose its comment letters, we explore the actions of the SEC and shareholder litigants. We find the two parties converge more on enforcement targets after the public disclosure. The increased alignment is attributable to public scrutiny of SEC oversight enhancing regulator incentives and reducing regulatory capture, and to shareholder plaintiffs gaining information previously accessible only by regulators, enabling litigants to identify cases with “merit.” These findings suggest regulatory transparency enhances the complementarity of public and private enforcement, potentially improving enforcement outcomes.