In 2012 President Obama signed into law the US Stop Trading On Congressional Knowledge (STOCK) Act to prohibit federal politicians from trading stocks, based on private information, for personal gain with an accompanying provision that they make public their transactions within 45 days of...

This article is based on a lecture at Nihon College of Law in Tokyo and draws on William K.S. Wang & Marc I. Steinberg, Insider Trading (Oxford University Press 3d ed. 2010); and William K.S. Wang, Stock Market Insider Trading: Victims, Violators, and Remedies–Including an Analogy to Fraud in...

We study the behavior of short sellers as informed market participants and examine potential sources of their information. Using a newly available dataset with high-frequency short sales data, we find evidence of significant increases in short sales immediately prior to large insider sales, but...

In this paper I examine the relationship between credit rating and insider trading of 301 firms from 2000-2006 for S&P 500 Index firms. I argue that changes to the firm credit rating may increase (decrease) informed trading activities. This investigation is essential since insiders with private...

Significant differences persist among the European Union and the United States in the regulation of issuers’ disclosure obligations on material corporate information. Lawmakers on either side of the Atlantic strive to pursue the same goals of market transparency and efficiency. However, in the...

Many nations ostensibly use (or at least credit) U.S. insider trading doctrine under Rule 10b-5 as the model for their own regulation of insider trading. This phenomenon has occurred in part because of historical and political factors and in part because the United States is seen as (and has...

Prior studies identify several motives for why firms release management earnings forecasts (MFs). A common feature of such studies is they pool MFs when drawing inferences about a specific motive. By ignoring the heterogeneous rationales managers have to issue MFs, pooling could lead to biased...

In the pre-Sarbanes-Oxley era corporate insiders were required to report trades in shares of their firm until the 10th of the month following the trade. This gave them considerable flexibility to time their trades and reports strategically, e.g., by executing a sequence of trades and reporting...