Margin Requirements and the Security Market Line

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Volume Title

A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

Date

2018-06

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en

Pages

41

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Journal of Finance, Volume 73, issue 3, pp. 1281-1321

Abstract

Between 1934 and 1974, the Federal Reserve changed the initial margin requirement for the U.S. stock market 22 times. I use this variation to show that investors' leverage constraints affect the pricing of risk. Consistent with earlier theoretical predictions, I find that tighter leverage constraints result in a flatter relation between betas and expected returns. My results provide strong empirical support for the idea that the constraints investors face may help explain the empirical failure of the capital asset pricing model.

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Jylhä, P 2018, ' Margin Requirements and the Security Market Line ', Journal of Finance, vol. 73, no. 3, pp. 1281-1321 . https://doi.org/10.1111/jofi.12616