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Do bond credit ratings lead to excess comovement?

Author

Listed:
  • Louis Raffestin

    (LEO - Laboratoire d'Économie d'Orleans [UMR7322] - UO - Université d'Orléans - UT - Université de Tours - CNRS - Centre National de la Recherche Scientifique)

Abstract

We investigate whether non-fundamental comovement results from investors using credit ratings to group assets into different “styles”. We find that bonds that join a new rating class start comoving more with the bonds in this class, even when fundamental factors suggest otherwise. We show that this comovement effect varies according to the nature of the bond considered, and the modalities of the rating action. Downgrades have a larger impact than upgrades, and rating reviews matter as much as actual movements. Finally, rating changes between grades BBB and BB, which lead bonds to be reclassified as either “high-yield” or “investment grade” assets, seem to be of particular importance.
(This abstract was borrowed from another version of this item.)

Suggested Citation

  • Louis Raffestin, 2017. "Do bond credit ratings lead to excess comovement?," Post-Print hal-01649992, HAL.
    • Handle: RePEc:hal:journl:hal-01649992
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    Cited by:

    1. Shen, Jianfeng & Zhang, Huiping & Zhang, Weiqi, 2025. "Credit rating and stock return comovement," Journal of Banking & Finance, Elsevier, vol. 177(C).
    2. Do, Hung X. & Nguyen, Lily & Nguyen, Nhut H. & Nguyen, Quan M.P., 2022. "LGBT policy, investor trading behavior, and return comovement," Journal of Economic Behavior & Organization, Elsevier, vol. 196(C), pages 457-483.
    3. Roy, Suvra & Nguyen, Harvey & Visaltanachoti, Nuttawat, 2023. "Be nice to the air: Severe haze pollution and mutual fund risk," Global Finance Journal, Elsevier, vol. 58(C).
    4. Cathcart, Lara & El-Jahel, Lina & Evans, Leo & Shi, Yining, 2019. "Excess comovement in credit default swap markets: Evidence from the CDX indices," Journal of Financial Markets, Elsevier, vol. 43(C), pages 96-120.
    5. Do, Hung X. & Nguyen, Nhut H. & Nguyen, Quan M.P., 2022. "Multinationals and stock return comovement," Global Finance Journal, Elsevier, vol. 52(C).
    6. Xinyuan Tao & Chunchi Wu, 2021. "Rating labels and style investing: Evidence from Moody's rating recalibration," Financial Management, Financial Management Association International, vol. 50(4), pages 1047-1084, December.

    More about this item

    JEL classification:

    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
    • G12 - Financial Economics - - General Financial Markets - - - Asset Pricing; Trading Volume; Bond Interest Rates
    • G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading
    • G24 - Financial Economics - - Financial Institutions and Services - - - Investment Banking; Venture Capital; Brokerage
    • D83 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Search; Learning; Information and Knowledge; Communication; Belief; Unawareness
    • F30 - International Economics - - International Finance - - - General

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