@unpublished{publication-8775,
	author={Brumm, Johannes and Grill, Michael and K{\"u}bler, Felix and Schmedders, Karl},
	institution={University of Zurich},
	number={13-59},
	pages=40,
	series={Swiss Finance Institute Research Paper},
	title={Margin Regulation and Volatility},
	year=2013,
}