Berkeley Program in Law and Economics

Congress passed the Private Securities Litigation Reform Act of 1995 in an attempt to discourage meritless securities fraud class actions. This paper uses damages, accounting, insider trading and governance variables to explain the incidence of securities fraud litigation both before and after the passage of the PSLRA. Using a matched sample of sued and non-sued firms from the computer hardware and software industries, we find that accounting and insider trading, which did not correlate with the incidence of litigation prior to the passage of the PSLRA, are significant after the passage of PSLRA. This finding is confirmed by our analysis of allegations and outcomes. Our accounting variables do not explain the incidence of pre-PSLRA accounting allegations, but they become significant after the passage of PSLRA. Similarly, insider trading variables do not explain insider trading allegations before the PSLRA, but net sales by insiders correlate with such allegations after its enactment. Finally, we find no correlation between lawsuit outcomes and our accounting variables before the PSLRA, but accounting variables are significant after its enactment. Abnormal insider sales correlate with outcomes before the PSLRA, but not after. Overall, we interpret our finding as evidence that the PSLRA has furthered Congress' goal of discouraging frivilous securities fraud lawsuits.