Recently, a number of studies have been published analyzing case filing trends for securities class actions as of mid-year 2010. Such studies include those conducted by Advisen (report here), Cornerstone Research/Stanford Law School (report here), and NERA (report here). While these studies use different sources and, in some cases, different methodologies to track and analyze data, they all point to a similar observation: that securities class action filings have been on a downward trend since late 2009 and that trend appears to be due in large part to the drying-up of credit crisis class action litigation.
It tends to makes sense. The overvaluation of mortgage-backed securities driven by an unregulated lending market created an unprecedented global recession with stock prices plummeting into the abyss. Naturally, one would expect this to result in a boom of securities fraud litigation, but would eventually burn itself out as the economy recovers and the number of defendants dwindles. Simply put, securities class actions tend to track the ebb and flow of world events, especially events such as a global recession. See e.g. the class action fall-out of the BP oil spill with lawsuits against BP, Transocean, and others.