The Sarbanes-Oxley Act, Security Analyst Monitoring Activity, and Firm Value

In this study we examine the complementary monitoring activity that takes place via the Sarbanes-Oxley Act (SOX) and its effect on security analyst monitoring activity and firm value of large and small public firms. Our findings indicate that security analyst monitoring activity has decreased post-SOX while firm value has increased post-SOX for both large and small firms. We also find that the increase in firm value is more pronounced for the group of small firms. Given these results, we surmise that the complementary monitoring activity provided by SOX is effective enough to have a positive impact on firm value.