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LIBOR troubles: Anomalous movements detection based on maximum entropy

Author

Listed:
  • Bariviera, Aurelio F.
  • Martín, María T.
  • Plastino, Angelo
  • Vampa, Victoria

Abstract

According to the definition of the London Interbank Offered Rate (LIBOR), contributing banks should give fair estimates of their own borrowing costs in the interbank market. Between 2007 and 2009, several banks made inappropriate submissions of LIBOR, sometimes motivated by profit-seeking from their trading positions. In 2012, several newspapers’ articles began to cast doubt on LIBOR integrity, leading surveillance authorities to conduct investigations on banks’ behavior. Such procedures resulted in severe fines imposed to involved banks, who recognized their financial inappropriate conduct. In this paper, we uncover such unfair behavior by using a forecasting method based on the Maximum Entropy principle. Our results are robust against changes in parameter settings and could be of great help for market surveillance.

Suggested Citation

  • Bariviera, Aurelio F. & Martín, María T. & Plastino, Angelo & Vampa, Victoria, 2016. "LIBOR troubles: Anomalous movements detection based on maximum entropy," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 449(C), pages 401-407.
    • Handle: RePEc:eee:phsmap:v:449:y:2016:i:c:p:401-407
    DOI: 10.1016/j.physa.2016.01.005
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    References listed on IDEAS

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    1. Rosa Abrantes-Metz & Sofia Villas-Boas & George Judge, 2011. "Tracking the Libor rate," Applied Economics Letters, Taylor & Francis Journals, vol. 18(10), pages 893-899.
    2. John C. Williams & John B. Taylor, 2009. "A Black Swan in the Money Market," American Economic Journal: Macroeconomics, American Economic Association, vol. 1(1), pages 58-83, January.
    3. Aurelio Fernandez Bariviera & María Belén Guercio & Lisana B. Martinez & Osvaldo A. Rosso, 2015. "The (in)visible hand in the Libor market: an information theory approach," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 88(8), pages 1-9, August.
    4. Aurelio F. Bariviera & M. Belen Guercio & Lisana B. Martinez & Osvaldo A. Rosso, 2015. "A permutation Information Theory tour through different interest rate maturities: the Libor case," Papers 1509.00217, arXiv.org.
    5. Martín, M.T. & Plastino, A. & Vampa, V. & Judge, G., 2014. "A parametric, information-theory model for predictions in time series," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 405(C), pages 63-69.
    6. Rosa Abrantes-Metz & Daniel Sokol, 2012. "Lessons from LIBOR for Detection and Deterrence of Cartel Wrongdoing," Antitrust Chronicle, Competition Policy International, vol. 11.
    7. Aurelio Fernandez Bariviera & M. Bel'en Guercio & Lisana B. Martinez, 2015. "Data manipulation detection via permutation information theory quantifiers," Papers 1501.04123, arXiv.org.
    8. Stenfors, Alexis, 2014. "LIBOR deception and central bank forward (mis-)guidance: Evidence from Norway during 2007–2011," Journal of International Financial Markets, Institutions and Money, Elsevier, vol. 32(C), pages 452-472.
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    Cited by:

    1. Bariviera, Aurelio F. & Guercio, M. Belén & Martinez, Lisana B. & Rosso, Osvaldo A., 2016. "Libor at crossroads: Stochastic switching detection using information theory quantifiers," Chaos, Solitons & Fractals, Elsevier, vol. 88(C), pages 172-182.
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    3. Lee, Kang-Bok & Han, Sumin & Jeong, Yeasung, 2020. "COVID-19, flattening the curve, and Benford’s law," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 559(C).

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