《Optimal Portfolios of Illiquid Assets》
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作者:
T. R. Hurd, Quentin H. Shao, Tuan Tran
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最新提交年份:
2016
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英文摘要:
This paper investigates the investment behaviour of a large unregulated financial institution (FI) with CARA risk preferences. It shows how the FI optimizes its trading to account for market illiquidity using an extension of the Almgren-Chriss market impact model of multiple risky assets. This expected utility optimization problem over the set of adapted strategies turns out to have the same solutions as a mean-variance optimization over deterministic trading strategies. That means the optimal adapted trading strategy is both deterministic and time-consistent. It is also found to have an explicit closed form that clearly displays interesting properties. For example, the classic constant Merton portfolio strategy, a particular solution of the frictionless limit of the problem, behaves like an attractor in the space of more general solutions. The main effect of temporary market impact is to slow down the speed of convergence to this constant Merton portfolio. The effect of permanent market impact is to incentivize the FI to buy additional risky assets near the end of the period. This property, that we name the Ponzi property, is related to the creation and bursting of bubbles in the market. The proposed model can be used as a stylized dynamic model of a typical FI in the study of the asset fire sale channel relevant to understanding systemic risk and financial stability.
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中文摘要:
本文研究了具有CARA风险偏好的大型无监管金融机构(FI)的投资行为。它展示了金融机构如何通过扩展多重风险资产的Almgren-Chris市场影响模型来优化其交易,以应对市场流动性不足。在一组适应策略上的预期效用优化问题与确定性交易策略上的均值-方差优化问题具有相同的解。这意味着最佳适应交易策略既具有确定性又具有时间一致性。还发现它有一个显式的闭合形式,可以清楚地显示有趣的特性。例如,经典的常数Merton投资组合策略是问题无摩擦极限的一种特殊解决方案,其行为类似于更一般解空间中的吸引子。临时市场影响的主要影响是减缓收敛到该恒定默顿投资组合的速度。永久性市场影响的效果是激励金融机构在接近期末时购买额外的风险资产。这种财产,我们称之为庞氏财产,与市场泡沫的产生和破裂有关。该模型可以作为典型金融机构的程式化动态模型,用于研究与理解系统风险和金融稳定性相关的资产抛售渠道。
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分类信息:
一级分类:Quantitative Finance 数量金融学
二级分类:Mathematical Finance 数学金融学
分类描述:Mathematical and analytical methods of finance, including stochastic, probabilistic and functional analysis, algebraic, geometric and other methods
金融的数学和分析方法,包括随机、概率和泛函分析、代数、几何和其他方法
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一级分类:Quantitative Finance 数量金融学
二级分类:Portfolio Management 项目组合管理
分类描述:Security selection and optimization, capital allocation, investment strategies and performance measurement
证券选择与优化、资本配置、投资策略与绩效评价
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