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The times change: multivariate subordination. Empirical facts

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  • Nicolas Huth
  • Fr�d�ric Abergel

Abstract

The management of correlation risk is of the utmost importance in several areas of investment banking: multi-asset derivatives pricing and hedging, optimal asset allocation, risk management, statistical arbitrage and many others.§ However, the modeling of correlation as a time-dependent quantity—as opposed to that of the volatility, say—is still in its infancy. In this article, we present a mechanism for the presence of a stochastic covariance matrix in financial markets, and provide an explanation for the returns' heavy tailed joint distribution. This mechanism relies on sampling returns according to an appropriate event time. Using CAC 40 high-frequency data, we compare the predictions of our model with real-world statistics and find very good agreement. §Even single asset derivatives desks are sensitive to shifts in correlation if, for instance, they are focused on a specific sectorial or geographic exposure.

Suggested Citation

  • Nicolas Huth & Fr�d�ric Abergel, 2012. "The times change: multivariate subordination. Empirical facts," Quantitative Finance, Taylor & Francis Journals, vol. 12(1), pages 1-10, March.
    • Handle: RePEc:taf:quantf:v:12:y:2012:i:1:p:1-10
    DOI: 10.1080/14697688.2010.481635
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    References listed on IDEAS

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    1. Jean-Philippe Bouchaud & Yuval Gefen & Marc Potters & Matthieu Wyart, 2003. "Fluctuations and response in financial markets: the subtle nature of `random' price changes," Papers cond-mat/0307332, arXiv.org, revised Aug 2003.
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    Cited by:

    1. Mehdi Lallouache & Fr'ed'eric Abergel, 2013. "Tick Size Reduction and Price Clustering in a FX Order Book," Papers 1307.5440, arXiv.org, revised Sep 2014.
    2. Ata Türkoğlu, 2016. "Normally distributed high-frequency returns: a subordination approach," Quantitative Finance, Taylor & Francis Journals, vol. 16(3), pages 389-409, March.
    3. Parker, Edgar, 2016. "Flash Crashes: The Role of Information Processing Based Subordination and the Cauchy Distribution in Market Instability," MPRA Paper 80039, University Library of Munich, Germany.
    4. Mehdi Lallouache & Frédéric Abergel, 2014. "Tick size reduction and price clustering in a FX order book," Post-Print hal-01006414, HAL.

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