Efficient Market Theory and Securities Fraud Class Certification
Here's a recent decision near and dear to the Dalai Lawyer's heart: Gariety v. Advanta Mortgage Corp., 2004 U.S. App. LEXIS 9305 (4th Cir. May 12, 2004). In Gariety, the Fourth Circuit held that a district court considering a motion for class certification in a securities fraud action must conduct a "rigorous analysis" of whether the company's stock traded on an efficient market.
On the facts presented, the Court noted that "[h]ad the court conducted an inquiry about the market for [the] stock, it would have been confronted with at least a serious question about whether plaintiffs in this case could demonstrate that they purchased their shares on a market sufficiently efficient to act as a surrogate for reliance." Id. at *20 n. The company's stock was unlisted during part of the class period, and traded only in the "Pink Sheets" and the Nasdaq OTC Bulletin Board after that.
The Court stated that in evaluating "whether a security trades on an efficient market, a court should consider factors such as, among others, whether the security is actively traded, the volume of trades, and the extent to which it is followed by market professionals." Id. at *31.
