Margin regulation and volatility

Johannes Brumm, Michael Grill, Felix Kubler, Karl H Schmedders*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


An infinite-horizon asset-pricing model with heterogeneous agents and collateral constraints can explain why adjustments in stock market margins under US Regulation T had an economically insignificant impact on market volatility. In the model, raising the margin requirement for one asset class may barely affect its volatility if investors have access to another, unregulated class of collateralizable assets. Through spillovers, however, the volatility of the other asset class may substantially decrease. A very strong dampening effect on all assets' return volatilities can be achieved by a countercyclical regulation of all markets.

Original languageEnglish (US)
Pages (from-to)54-68
Number of pages15
JournalJournal of Monetary Economics
StatePublished - Oct 2015


  • Collateral constraints
  • General equilibrium
  • Heterogeneous agents
  • Margin requirements
  • Regulation T

ASJC Scopus subject areas

  • Finance
  • Economics and Econometrics


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