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Fraud on the Market: Analysis of the Efficiency of the Corporate Bond Market

49 Pages Posted: 3 Aug 2011 Last revised: 11 Aug 2011

Michael L. Hartzmark

Hartzmark Economics Litigation Practice

Cindy A. Schipani

University of Michigan, Stephen M. Ross School of Business

H. Nejat Seyhun

University of Michigan, Stephen M. Ross School of Business

Date Written: July 1, 2011

Abstract

The efficiency of the corporate bond market is not well understood. Although many of the factors used to analyze stock market efficiency translate with some adjustments to corporate bond markets, the cause-effect factor is not intuitive and can be a source of significant confusion.

In this manuscript we analyze bond market efficiency in the context of a recent court decision. In recent litigation concerning allegations of securities fraud perpetrated by the American International Group (AIG), the federal district court for the Southern District of New York declined to certify a class of bondholders, citing lack of common questions of law or fact. The decision turned on an empirical analysis of whether certain AIG bonds traded in an open, developed and efficient market. If the market for these bonds had been found efficient, there would have been grounds to certify the bondholders as a class.

Ironically, the court found insufficient empirical evidence to hold that the $1.71 billion in AIG bonds, issued by the world’s largest insurance company, traded in efficient markets. Unfortunately, the AIG court missed salient differences between the stock and bond markets in reaching its conclusion. Our manuscript describes the analysis missed by the court and supports a contrary result.

Part I provides an overview of the law as it has developed regarding certification of class actions and the elements of a claim of fraud on the market as relevant to the lead plaintiffs’ claims of violations of the securities laws. Part II introduces the required empirical analysis and benchmarks to evaluate a claim of fraud on the market. Part III continues with a theoretical discussion of the distinctions missing in the AIG analysis between bonds and stocks relevant to determining whether the bond market should be afforded the fraud on the market presumption. Part IV builds on this with a discussion of our alternate empirical analyses. Concluding remarks follow.

The AIG decision has serious implications not only for the corporate bond market but also for public policy. Private securities fraud class actions are an important mechanism for deterring fraud and promoting confidence in the securities markets. When market efficiency is important for determining certification of a class of security holders, it is critical that courts carefully consider how different markets operate.

Keywords: fraud on the market, corporate bond market, class action, market efficiency, corporate governance

JEL Classification: G32, G39, G34, K22, K00, K41

Suggested Citation

Hartzmark, Michael L. and Schipani, Cindy A. and Seyhun, H. Nejat, Fraud on the Market: Analysis of the Efficiency of the Corporate Bond Market (July 1, 2011). Columbia Business Law Review, 2011; Ross School of Business Paper No. 1158. Available at SSRN: https://ssrn.com/abstract=1904390

Michael L. Hartzmark

Hartzmark Economics Litigation Practice ( email )

4950 S CHICAGO BEACH DR
Suite 6A
Chicago, IL Illinois 60615
United States
3127189699 (Phone)

HOME PAGE: http://HELP-Econ.com

Cindy A. Schipani (Contact Author)

University of Michigan, Stephen M. Ross School of Business ( email )

701 Tappan Street
Ann Arbor, MI 48109
United States
(734) 763-2257 (Phone)
(734) 763-2257 (Fax)

H. Nejat Seyhun

University of Michigan, Stephen M. Ross School of Business ( email )

701 Tappan Street
Ann Arbor, MI MI 48109
United States
734-763-5463 (Phone)

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