Roll's Critique

Definition:

That the CAPM holds by construction when performance is measured against a mean-variance efficient index; otherwise, it holds not at all. Attributable to Richard Roll in 1977.

Investing Essentials


Copyright © 2011 Campbell R. Harvey, Professor of Finance, Fuqua School of Business at Duke University

Term of the Day

Shakeout

A dramatic change in market conditions that forces speculators to sell their positions, often at a loss.

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