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Information diversity, collusion of informed traders and asset prices

Author

Listed:
  • Huang, XiaoHong
  • Ni, Jian
  • Xu, Yue

Abstract

This paper investigates the effects of imperfect competition arising from the potential collusion of informed traders on asset prices in a financial market with information diversity. We report several new results when both imperfect competition and information diversity are present. It is shown that imperfect competition tends to induce strategic substitutability in the trading behaviors of different types of traders, and this will, in turn, raise the cost of capital and make the market thinner. Meanwhile, the intensity of informed trading may also be reduced, possibly dampening the informational efficiency of the market and exacerbating the price volatility. We compare and contrast our results with previous studies to highlight the necessity to investigate imperfect competition in a market with information diversity.

Suggested Citation

  • Huang, XiaoHong & Ni, Jian & Xu, Yue, 2026. "Information diversity, collusion of informed traders and asset prices," Economic Modelling, Elsevier, vol. 154(C).
    • Handle: RePEc:eee:ecmode:v:154:y:2026:i:c:s0264999325003165
    DOI: 10.1016/j.econmod.2025.107321
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    References listed on IDEAS

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    1. Froot, Kenneth A & Scharftstein, David S & Stein, Jeremy C, 1992. "Herd on the Street: Informational Inefficiencies in a Market with Short-Term Speculation," Journal of Finance, American Finance Association, vol. 47(4), pages 1461-1484, September.
    2. John Connor, 2005. "Collusion and price dispersion," Applied Economics Letters, Taylor & Francis Journals, vol. 12(6), pages 335-338.
    3. Susan Athey & Kyle Bagwell & Chris Sanchirico, 2004. "Collusion and Price Rigidity," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 71(2), pages 317-349.
    4. Jayant Vivek Ganguli & Liyan Yang, 2009. "Complementarities, Multiplicity, and Supply Information," Journal of the European Economic Association, MIT Press, vol. 7(1), pages 90-115, March.
    5. Laura L. Veldkamp, 2006. "Media Frenzies in Markets for Financial Information," American Economic Review, American Economic Association, vol. 96(3), pages 577-601, June.
    6. Dimitri Vayanos & Jiang Wang, 2012. "Liquidity and Asset Returns Under Asymmetric Information and Imperfect Competition," The Review of Financial Studies, Society for Financial Studies, vol. 25(5), pages 1339-1365.
    7. Caio Machado & Ana Elisa Pereira, 2023. "Optimal Capital Structure with Stock Market Feedback," Review of Finance, European Finance Association, vol. 27(4), pages 1329-1371.
    8. Deqing Zhou & Fang Zhen, 2021. "On the Impacts of Overconfidence under Information Diversity," International Review of Finance, International Review of Finance Ltd., vol. 21(1), pages 345-357, March.
    9. Harrington, Joseph Jr. & Chen, Joe, 2006. "Cartel pricing dynamics with cost variability and endogenous buyer detection," International Journal of Industrial Organization, Elsevier, vol. 24(6), pages 1185-1212, November.
    10. Marco Pagano, 1989. "Endogenous Market Thinness and Stock Price Volatility," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 56(2), pages 269-287.
    11. Ozsoylev, Han N. & Walden, Johan, 2011. "Asset pricing in large information networks," Journal of Economic Theory, Elsevier, vol. 146(6), pages 2252-2280.
    12. Compte, Olivier & Jenny, Frederic & Rey, Patrick, 2002. "Capacity constraints, mergers and collusion," European Economic Review, Elsevier, vol. 46(1), pages 1-29, January.
    13. Hellwig, Martin F., 1980. "On the aggregation of information in competitive markets," Journal of Economic Theory, Elsevier, vol. 22(3), pages 477-498, June.
    14. James Dow & Itay Goldstein & Alexander Guembel, 2017. "Incentives for Information Production in Markets where Prices Affect Real Investment," Journal of the European Economic Association, European Economic Association, vol. 15(4), pages 877-909.
    15. Itay Goldstein & Yan Li & Liyan Yang, 2014. "Speculation and Hedging in Segmented Markets," The Review of Financial Studies, Society for Financial Studies, vol. 27(3), pages 881-922.
    16. Jiang Wang, 1993. "A Model of Intertemporal Asset Prices Under Asymmetric Information," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 60(2), pages 249-282.
    17. Grossman, Sanford J & Stiglitz, Joseph E, 1980. "On the Impossibility of Informationally Efficient Markets," American Economic Review, American Economic Association, vol. 70(3), pages 393-408, June.
    18. Kovalenkov, Alexander & Vives, Xavier, 2014. "Competitive rational expectations equilibria without apology," Journal of Economic Theory, Elsevier, vol. 149(C), pages 211-235.
    19. Gonzalez-Perez, Maria T., 2015. "Model-free volatility indexes in the financial literature: A review," International Review of Economics & Finance, Elsevier, vol. 40(C), pages 141-159.
    20. repec:bla:jfinan:v:59:y:2004:i:4:p:1553-1583 is not listed on IDEAS
    21. Philip Bond & Itay Goldstein, 2015. "Government Intervention and Information Aggregation by Prices," Journal of Finance, American Finance Association, vol. 70(6), pages 2777-2812, December.
    22. Diego García & Günter Strobl, 2011. "Relative Wealth Concerns and Complementarities in Information Acquisition," The Review of Financial Studies, Society for Financial Studies, vol. 24(1), pages 169-207.
    23. Bing Han & Liyan Yang, 2013. "Social Networks, Information Acquisition, and Asset Prices," Management Science, INFORMS, vol. 59(6), pages 1444-1457, June.
    24. He, Feng & Feng, Yaqian & Hao, Jing, 2022. "Information disclosure source, investors’ searching and stock price crash risk," Economics Letters, Elsevier, vol. 210(C).
    25. Gopal Basak & Mrinal Ghosh & Diganta Mukherjee, 2011. "Influence of Big Traders on the Stock Market: Theory and Simulation," Dynamic Games and Applications, Springer, vol. 1(2), pages 220-252, June.
    26. Itay Goldstein & Liyan Yang, 2015. "Information Diversity and Complementarities in Trading and Information Acquisition," Journal of Finance, American Finance Association, vol. 70(4), pages 1723-1765, August.
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    Keywords

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    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

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