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Margin regulation and volatility


Brumm, Johannes; Grill, Michael; Kübler, Felix; Schmedders, Karl (2015). Margin regulation and volatility. Journal of Monetary Economics, 75:54-68.

Abstract

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.

Abstract

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.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:03 Faculty of Economics > Department of Business Administration
Dewey Decimal Classification:330 Economics
Language:English
Date:2015
Deposited On:27 Nov 2015 09:33
Last Modified:20 Sep 2017 01:41
Publisher:Elsevier
ISSN:0304-3932
Publisher DOI:https://doi.org/10.1016/j.jmoneco.2014.12.007
Other Identification Number:merlin-id:12596

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