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What happened to the quants in August 2007? Evidence from factors and transactions data

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  • Khandani, Amir E.
  • Lo, Andrew W.

Abstract

Using the simulated returns of long/short equity portfolios based on five valuation factors, we find evidence that the "Quant Meltdown" of August 2007 began in July and continued until the end of 2007. We simulate a high-frequency marketmaking strategy, which exhibited significant losses during the week of August 6, 2007, but was profitable before and after, suggesting that the dislocation was due to market-wide deleveraging and a sudden withdrawal of marketmaking risk capital starting August 8. We identify two unwinds - one on August 1 starting at 10:45am and ending at 11:30am, and a second at the open on August 6, ending at 1:00pm - that began with stocks in the financial sector, long book-to-market, and short earnings momentum.

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Bibliographic Info

Article provided by Elsevier in its journal Journal of Financial Markets.

Volume (Year): 14 (2011)
Issue (Month): 1 (February)
Pages: 1-46

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Handle: RePEc:eee:finmar:v:14:y:2011:i:1:p:1-46

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Web page: http://www.elsevier.com/locate/finmar

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Keywords: Systemic risk August 2007 Hedge funds Market-making Flash crash;

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Cited by:
  1. Akay, Ozgur (Ozzy) & Senyuz, Zeynep & Yoldas, Emre, 2013. "Hedge fund contagion and risk-adjusted returns: A Markov-switching dynamic factor approach," Journal of Empirical Finance, Elsevier, vol. 22(C), pages 16-29.
  2. Sheng Guo, 2014. "Margin Requirements and Portfolio Optimization: A Geometric Approach," Working Papers 1406, Florida International University, Department of Economics.
  3. de la Torre, Augusto & Ize, Alain, 2009. "Regulatory reform : integrating paradigms," Policy Research Working Paper Series 4842, The World Bank.
  4. Ozsoylev, Han N. & Walden, Johan, 2011. "Asset pricing in large information networks," Journal of Economic Theory, Elsevier, vol. 146(6), pages 2252-2280.
  5. Andrew W Lo, 2009. "Regulatory reform in the wake of the financial crisis of 2007-2008," Journal of Financial Economic Policy, Emerald Group Publishing, vol. 1(1), pages 4-43, April.
  6. Angelidis, Timotheos & Giamouridis, Daniel & Tessaromatis, Nikolaos, 2013. "Revisiting mutual fund performance evaluation," Journal of Banking & Finance, Elsevier, vol. 37(5), pages 1759-1776.
  7. Peter Christoffersen & Hugues Langlois, 2011. "The Joint Dynamics of Equity Market Factors," CREATES Research Papers 2011-45, School of Economics and Management, University of Aarhus.
  8. Wolfgang Bessler & Julian Holler & Philipp Kurmann, 2012. "Hedge funds and optimal asset allocation: Bayesian expectations and spanning tests," Financial Markets and Portfolio Management, Springer, vol. 26(1), pages 109-141, March.
  9. Benos, Evangelos & Wetherilt, Anne, 2012. "The role of designated market makers in the new trading landscape," Bank of England Quarterly Bulletin, Bank of England, vol. 52(4), pages 343-353.
  10. Karolyi, G. Andrew & Lee, Kuan-Hui & van Dijk, Mathijs A., 2012. "Understanding commonality in liquidity around the world," Journal of Financial Economics, Elsevier, vol. 105(1), pages 82-112.

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