Securities class action involving corporate bond event studies.Counsel representing former executives of a publicly traded company retained Cornerstone Research and Professor René Stulz of the Ohio State University to analyze loss causation and damages in a Section 10(b) securities class action. The case posed unique challenges because the class included purchasers of eight corporate bonds that traded infrequently during the class period, in addition to purchasers of company stock. The plaintiffs alleged that the prices of the eight bonds were artificially inflated by misrepresentations related to the company's forward guidance, violations of generally accepted accounting principles (GAAP) in financial statements, and misrepresentations related to the adequacy of the company's internal controls.

what specific challenges did Cornerstone Research and Professor René Stulz address