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Working Paper

Hiring Cheerleaders: Board Appointments of "Independent" Directors

In this paper we exploit a database of independent directors to test the hypothesis that boards appoint directors who, while technically independent according to regulatory definitions, nonetheless may be overly sympathetic to management.

Journal Article

Quality Minus Junk

We show that a quality-minus-junk (QMJ) factor that goes long high-quality stocks and shorts low-quality stocks earns significant risk-adjusted returns in the U.S. and globally. Also, controlling for quality resurrects the otherwise moribund size effect.

Working Paper

Embedded Leverage

Embedded leverage—the amount of market exposure per unit of committed capital—has become an important feature of financial instruments. We study embedded leverage in equity options, index options and ETFs, and how it affects the required returns.

Journal Article

Buffett's Alpha

[Winner of the CFA Institute's 2018 Graham and Dodd Award] What is the secret to Warren Buffett's success? We seek the answer via a thorough empirical analysis in light of some the latest research on the drivers of returns.

Journal Article

The Small World of Investing: Board Connections and Mutual Fund Returns

Information moves security prices.

Journal Article

The Devil in HML's Details

This paper challenges the standard method for measuring “value” used in academic work on factor pricing.

Journal Article

The Disposition Effect and the Under-Reaction to News

Mounting evidence challenges the traditional view that securities are rationally priced to reflect publicly available information.

Journal Article

Fact, Fiction and Momentum Investing

Momentum is the phenomenon that securities that have performed well relative to peers (winners) on average continue to outperform, and securities that have performed relatively poorly (losers) tend to continue to underperform.

Journal Article

Fact, Fiction and Value Investing

Value investing has been a part of the investment lexicon for at least the better part of a century, yet confusion about it remains.

Journal Article

Economic Links and Predictable Returns

This paper provides evidence that investors often fail to consider economic links between companies when making investment decisions and this phenomenon can have a substantial effect on asset prices.