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arXiv 1909.00748q-fin.MF
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因素不确定下的投资组合清算

Portfolio liquidation under factor uncertainty

Ulrich Horst, Xiaonyu Xia, Chao Zhou

摘要:

研究了价格影响参数不确定情况下的最优清算问题.我们的主要结果表明,价值函数和最优交易策略可以用具有超线性梯度、单调生成元和奇异终值的半线性偏微分方程的解来刻画。本文还建立了在少量不确定性下的鲁棒模型的渐近分析,并分析了鲁棒性对最优交易策略和清算成本的影响。特别是,在我们的模型中,模糊厌恶在观察上等同于增加风险厌恶。这表明,模糊厌恶增加清算率。

英文摘要:

We study an optimal liquidation problem under the ambiguity with respect to price impact parameters. Our main results show that the value function and the optimal trading strategy can be characterized by the solution to a semi-linear PDE with superlinear gradient, monotone generator and singular terminal value. We also establish an asymptotic analysis of the robust model for small amount of uncertainty and analyse the effect of robustness on optimal trading strategies and liquidation costs. In particular, in our model ambiguity aversion is observationally equivalent to increased risk aversion. This suggests that ambiguity aversion increases liquidation rates.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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