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Columbia Law School

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Capital Asset Pricing Model (CAPM)

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Full-Text Articles in Law

The Future Of Disclosure: Esg, Common Ownership, And Systematic Risk, John C. Coffee Jr. Jan 2021

The Future Of Disclosure: Esg, Common Ownership, And Systematic Risk, John C. Coffee Jr.

Faculty Scholarship

The U.S. securities markets have recently undergone (or are undergoing) three fundamental transitions: (1) institutionalization (with the result that institutional investors now dominate both trading and stock ownership); (2) extraordinary ownership concentration (with the consequence that the three largest U.S. institutional investors now hold 20% and vote 25% of the shares in S&P 500 companies); and (3) the introduction of ESG disclosures (which process has been driven in the U.S. by pressure from large institutional investors). In light of these transitions, how should disclosure policy change? Do institutions and retail investors have the same or different disclosure needs? Why are …


Mome In Hindsight, Ronald J. Gilson, Reinier Kraakman Jan 2004

Mome In Hindsight, Ronald J. Gilson, Reinier Kraakman

Faculty Scholarship

Two decades ago, the Virginia Law Review published our article “The Mechanisms of Market Efficiency” (MOME), in which we tried to discern the institutional underpinnings of financial market efficiency. We concluded that the level of market efficiency with respect to a particular fact depends on which of several market mechanisms — universally informed trading, professionally informed trading, derivatively informed trading, and uninformed trading (each of which we explain below) — operates to reflect that fact in market price. Which mechanism is operative, in turn, depends on how widely the fact is distributed among traders, which, I turn, depends on the …