SYNOPSIS We examine whether regulations requiring accelerated filing deadlines and internal control reporting and testing affect financial statement reliability. Unlike prior research, we examine whether these regulatory changes are associated with an increase in the likelihood that misstatements originate in the period following the respective change. If the implementation of these rules causes a misstatement, then the misstatement would most likely occur in the period immediately following the rule change. We provide evidence that accelerated filers (AFs) experience an increase in the likelihood of an originating misstatement following the acceleration of filing deadlines from 90 to 75 days. Large accelerated filers (LAFs), however, do not experience a similar increase following this acceleration or the subsequent acceleration from 75 to 60 days. After the implementation of the SOX Section 404 internal control requirements, we find that the likelihood of an originating misstatement declined for AFs but not for LAFs. Taken together, the findings suggest that, although AFs experienced an initial decrease in financial statement reliability, this decrease was temporary. Data Availability: Data are publicly available from the sources identified in the text.