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中国管理科学 ›› 2025, Vol. 33 ›› Issue (8): 26-36.doi: 10.16381/j.cnki.issn1003-207x.2022.2628

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模糊波动下的策略交易和市场质量

颜镜洲1, 李仲飞2(), 毛杰3,4, 李星毅5   

  1. 1.四川大学经济学院,四川 成都 610065
    2.南方科技大学金融系,广东 深圳 518055
    3.上海大学经济学院,上海 200444
    4.复旦大学金融研究中心,上海 200433
    5.深圳大学经济学院,广东 深圳 518060
  • 收稿日期:2022-12-06 修回日期:2023-08-12 出版日期:2025-08-25 发布日期:2025-09-10
  • 通讯作者: 李仲飞 E-mail:lizf6@sustech.edu.cn
  • 基金资助:
    国家社会科学基金西部项目(24XJY014);国家社会科学基金重大项目(23ZDA024);广东省哲学社会科学规划项目(GD25YYJ13);深圳大学青年教师科研启动项目(RC20240283)

Strategic Trading and Market Quality under Ambiguous Volatility

Jingzhou Yan1, Zhongfei Li2(), Jie Mao3,4, Xingyi Li5   

  1. 1.School of Economics,Sichuan University,Chengdu 610065,China
    2.Department of Finance,Southern University of Science and Technology,Shenzhen 518055,China
    3.School of Economics,Shanghai University,Shanghai 200444,China
    4.Centre for Financial Research,Fudan University,Shanghai 200433,China
    5.College of Economics,Shenzhen University,Shenzhen 518060,China
  • Received:2022-12-06 Revised:2023-08-12 Online:2025-08-25 Published:2025-09-10
  • Contact: Zhongfei Li E-mail:lizf6@sustech.edu.cn

摘要:

在策略交易的框架下,本文构建了具有模糊波动的连续时间市场微观结构模型,考察和研究了模糊波动对策略交易和市场质量的影响。将模糊波动引入到连续时间策略交易中,运用随机最优控制理论,通过求解相应的HJBI方程,得到了模糊波动下均衡策略交易和市场质量以及值函数的显式解。通过计算发现,当模糊波动增大时, 知情交易者策略交易的最优交易强度减弱,市场的流动性变差, 风险资产期望总交易量减少,知情交易者的期望财富减少,期望总交易利润下降。上述影响效果与常数波动所产生的效果相反。本文的研究不仅深化了对模糊波动和常数波动两者之间差异的既有认识,还对模糊波动下的市场机制设计提供了一定的理论指导。

关键词: 连续时间市场微观结构, 模糊波动, 策略交易, 市场质量

Abstract:

Since the outbreak of COVID-19, financial markets worldwide have experienced frequent significant fluctuations, occasionally triggering circuit breaker mechanisms, leading to numerous instances of stocks plummeting. The vast changes in market volatility and its uncertain distribution have made it challenging for investors to accurately predict market dynamics, a phenomenon referred to as ambiguous volatility. Consequently, how ambiguous volatility affects market liquidity is asked. How does it impact investors' trading intensity, expected wealth, and trading volume? These questions are not only important but also intriguing for policymakers and investors alike. In light of this, a continuous-time market microstructure model incorporating ambiguous volatility within a strategic trading framework is constructed and stochastic optimal control theory is applied to solve the corresponding Hamilton-Jacobi-Bellman-Isaacs (HJBI) equation, thereby explicitly revealing the impact of ambiguous volatility on informed traders' trading strategies and market quality. The findings indicate that an increase in ambiguous volatility leads to a decrease in the optimal trading intensity of informed traders, worsened market liquidity, a reduction in the expected total trading volume of risky assets, and a decrease in informed traders' expected wealth and overall profits. These effects contrast sharply with those observed under constant volatility. It not only deepens our existing understanding of the differences between ambiguous and constant volatility but also provides theoretical guidance for designing market mechanisms under conditions of uncertain volatility in this paper. It emphasizes the importance of reducing market ambiguity to maintain normal and healthy market operations and to prevent systemic financial risks, highlighting the need for further empirical research to accurately measure ambiguous volatility.

Key words: continuous time market microstructure, ambiguous volatility, trading strategy, market quality

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