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University of Michigan Law School

Securities Law

Efficiency

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Full-Text Articles in Law

Market Efficiency And The Problem Of Retail Flight, Alicia J. Davis Nov 2014

Market Efficiency And The Problem Of Retail Flight, Alicia J. Davis

Articles

In 1950, 91 % of common stock in the U.S. was owned directly by individual inves­ tors. Today, that percentage stands at only 23%. The mass exodus of retail investors and their investment dollars has negative implications not only for capital formation and investor protection, but also for market efficiency. Individual investors are often assumed to be noise traders who distort stock prices and harm market functioning. Therefore, some argue that their withdrawal from the market should be of little concern; indeed, it should be celebrated. Recent empirical evidence calls this assertion of retail noise trading into doubt, and this …


Private Regulation Of Insider Trading In The Shadow Of Lax Public Enforcement: Evidence From Canadian Firms, Laura Nyantung Beny, Anita Anand Jan 2013

Private Regulation Of Insider Trading In The Shadow Of Lax Public Enforcement: Evidence From Canadian Firms, Laura Nyantung Beny, Anita Anand

Articles

Like firms in the United States, many Canadian firms voluntarily restrict trading by corporate insiders beyond the requirements of insider trading laws (i.e., super-compliance). Thus, we aim to understand the determinants of firms’ private insider trading policies (ITPs), which are quasi-contractual devices. Based on the assumption that firms that face greater costs from insider trading (or greater benefits from restricting insider trading) ought to be more inclined than other firms to adopt more stringent ITPs, we develop several testable hypotheses. We test our hypotheses using data from a sample of firms included in the Toronto Stock Exchange/Standard and Poor’s (TSX/S&P) …


Facebook, The Jobs Act, And Abolishing Ipos, Adam C. Pritchard Jan 2012

Facebook, The Jobs Act, And Abolishing Ipos, Adam C. Pritchard

Articles

Initial public offerings (IPOs)-the first sale of private firms' stock to the public-are a bellwether of investor sentiment. Investors must be bullish if they are putting their money into untested start-ups. IPOs are frequently cited in the business press as a key barometer of the health of financial markets. Politicians, too, see a steady flow of IPOs as an indicator that capital is fueling the entrepreneurial initiative that sustains the growth of new businesses. Growing businesses create jobs, so Republicans and Democrats can find common ground on the importance of promoting IPOs. That bipartisan consensus was on display this spring …


Insider Trading Rules Can Affect Attractiveness Of Country's Stock Markets, Laura Nyantung Beny Jan 2007

Insider Trading Rules Can Affect Attractiveness Of Country's Stock Markets, Laura Nyantung Beny

Articles

The academic debate about the desirability of prohibiting insider trading is longstanding and as yet unresolved. Until Henry Manne’s 1966 book, Insider Trading and the Stock Market, the debate centered on whether insider trading is unfair to public investors who are not privy to private corporate information. However, the fairness approach is malleable and indeterminate and thus does not lend itself to clear-cut policy prescriptions. Since Manne’s book, the focus of the debate has been on the effect of insider trading on economic efficiency. Manne argued that, contrary to the prevailing legal and moral opinion of the time, insider trading …


Behavioral Economics And The Sec, Stephen J. Choi, Adam C. Pritchard Jan 2003

Behavioral Economics And The Sec, Stephen J. Choi, Adam C. Pritchard

Articles

Not all investors are rational. Quite apart from the obvious examples of credulity in the face of the latest Ponzi scheme, there is no shortage of evidence that many investors' decisions are influenced by systematic biases that impair their abilities to maximize their investment returns. For example, investors will often hold onto poorly performing stocks longer than warranted, hoping to recoup their losses. Other investors will engage in speculative trading, dissipating their returns by paying larger commissions than more passive investors. And we are not just talking about widows and orphans here. There is evidence that supposedly sophisticated institutional investors-mutual …