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The Asymmetric Relation Between Margin Requirements and Stock Market Volatility Across Bull and Bear Markets

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  • Hardouvelis, Gikas A
  • Pericli, Andreas
  • Theodossiou, Panayiotis

Abstract

EGARCH-M models based on a daily, weekly, and monthly S&P–500 returns over the period October 1934–September 1994 reveal that higher margins have a much stronger negative relation to subsequent volatility in bull markets than in bear markets. Higher margins are also negatively related to subsequent conditional stock returns, apparently because they reduce systemic risk. These empirical regularities are consistent with the pyramiding-depyramiding framework of stock prices that US Congress had in mind when it instituted margin regulation in 1934, and suggest that a prudential rule for setting margins over time would be to raise them during periods of unwarranted price increases and to lower them immediately after large declines in stock prices.

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Bibliographic Info

Paper provided by C.E.P.R. Discussion Papers in its series CEPR Discussion Papers with number 1746.

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Date of creation: Nov 1997
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Handle: RePEc:cpr:ceprdp:1746

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Related research

Keywords: asymmetry; Credit; EGARCH model; Federal Reserve; Margin Requirements; Stock Prices; Volatility;

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Cited by:
  1. Georgy Chabakauri, 2012. "Asset Pricing with Heterogeneous Investors and Portfolio Constraints," FMG Discussion Papers dp707, Financial Markets Group.

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