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Firm Disclosures, Uncertain Profits, and (Indirectly) Priced Idiosyncratic Volatility

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  • Xuhui (Nick) Pan
  • Bharat Raj Parajuli
  • Petra Sinagl

Abstract

We show that the negative relation between idiosyncratic volatility (IVOL) and expected returns exists only among firms with low profitability and high uncertainty about profitability. We propose an incomplete information model in which agents cannot disentangle systematic from idiosyncratic shocks. While not priced directly, IVOL affects expected returns by lowering signal accuracy, which decreases the factor loading on the systematic risk and yields the negative IVOL‐return relation. The model predicts that this negative relation is the strongest among underperforming firms with highly uncertain profitability. Our model effectively explains a significant portion of the observed negative IVOL‐return relation (86%) in the data.

Suggested Citation

  • Xuhui (Nick) Pan & Bharat Raj Parajuli & Petra Sinagl, 2025. "Firm Disclosures, Uncertain Profits, and (Indirectly) Priced Idiosyncratic Volatility," Journal of Business Finance & Accounting, Wiley Blackwell, vol. 52(5), pages 2415-2437, November.
    • Handle: RePEc:bla:jbfnac:v:52:y:2025:i:5:p:2415-2437
    DOI: 10.1111/jbfa.70004
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