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Momentum mechanisms under heterogeneous beliefs

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  • Yan, Yu
  • Tong, Yan
  • Wang, Yiming

Abstract

We establish a continuous-time heterogeneous beliefs model to discuss the mechanisms of Momentum and Reversal. Price learning, information transmission and extrapolative expectation are incorporated into a unified framework for the Momentum and Reversal. The calibration results from SP500 show that the presence of Extrapolators and Information-driven Traders are important influences of Momentum and Reversal in all phases. We also find that momentum and reversal become significantly stronger as belief weights approach true belief weights.

Suggested Citation

  • Yan, Yu & Tong, Yan & Wang, Yiming, 2025. "Momentum mechanisms under heterogeneous beliefs," The North American Journal of Economics and Finance, Elsevier, vol. 75(PA).
    • Handle: RePEc:eee:ecofin:v:75:y:2025:i:pa:s1062940824001876
    DOI: 10.1016/j.najef.2024.102262
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    More about this item

    Keywords

    Heterogeneous beliefs; Extrapolators; Information transmission; Momentum;
    All these keywords.

    JEL classification:

    • 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

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