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Full-Text Articles in Law
The Stock Market Reaction To Class Action Filings Post Pslra, Mark S. Klock
The Stock Market Reaction To Class Action Filings Post Pslra, Mark S. Klock
Mark S Klock
Using a substantially larger sample than has been used before, and a sample that includes the Great Financial Crisis and its ensuing recession, I investigate the stock market reaction to securities class action filings following the enactment of the Private Securities Litigation Reform Act through the first quarter of 2012. I find that on average, even after adjusting for market downturns, there is a statistically significant negative abnormal return at the time of filing. There is also a statistically significant negative abnormal return during the weeks preceding the filing indicating that the market partially, but not fully, anticipates these filings. …
Lessons From Single-Company Event Studies: The Importance Of Controlling For Company-Specific Events, Scott D. Hakala
Lessons From Single-Company Event Studies: The Importance Of Controlling For Company-Specific Events, Scott D. Hakala
Scott D Hakala
Single-company event studies are commonly employed in applied practice, such as in analyzing market efficiency, reliance, and damages in securities litigation. However, the presence of significant company-specific events among the observations used to estimate the market model results in significantly biased, overstated standard errors (a well-known omitted variables problem) and less reliable coefficient estimates in such studies. This is a frequently over-looked or neglected issue that renders the statistical inferences in single-company event studies employing using more traditional event study techniques biased and often unreliable. This paper demonstrates through simulation and actual examples that, even allowing for errors in implementation, …