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Validating cross-sectional dependence assumptions in a factor model

Author

Listed:
  • Longyu Chen

    (China Merchants Financial Holdings)

  • Haitao Huang

    (Nanjing University)

  • Lei Jiang

    (Kent State University)

  • Liang Peng

    (Georgia State University)

  • Zhongling Qin

    (Auburn University)

Abstract

Assessing market efficiency and investment performance often relies on a simultaneous test for zero intercepts in a factor model, and such a test is asymptotically valid under some cross-sectional dependence (CSD) assumptions such as sparsity or sufficiently weak CSD. Because these assumptions are imposed from theoretical needs, a direct validation is almost infeasible. This paper introduces a novel approach to indirectly validating the CSD assumptions by adapting existing tests to factor model residuals. Theoretically, the adapted tests can be shown to exhibit a normal limit under the same conditions as the original tests. Empirically, the adapted tests indicate that some prominent factor models fail to capture CSD, confounding the intended interpretation of the original tests. While CSD is always a problematic feature in returns, we identify various stock characteristics as promising for constructing factors explaining CSD.

Suggested Citation

  • Longyu Chen & Haitao Huang & Lei Jiang & Liang Peng & Zhongling Qin, 2025. "Validating cross-sectional dependence assumptions in a factor model," Empirical Economics, Springer, vol. 68(6), pages 2873-2895, June.
  • Handle: RePEc:spr:empeco:v:68:y:2025:i:6:d:10.1007_s00181-025-02719-y
    DOI: 10.1007/s00181-025-02719-y
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    More about this item

    Keywords

    Cross-sectional dependence (CSD); Factor models; Market efficiency; Mutual fund performance; Simultaneous tests;
    All these keywords.

    JEL classification:

    • C12 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Hypothesis Testing: General
    • C18 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Methodolical Issues: General
    • G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading

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