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arXiv 1004.1489q-fin.PMmath.OC
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最优消费-投资问题中的非流动性效应

Illiquidity Effects in Optimal Consumption-Investment Problems

Michael Ludkovski, Hyekyung Min

摘要:

本文研究了在扰动的Black-Scholes-Merton模型中,流动性冻结对经济主体优化其消费效用的影响。单一风险资产遵循几何布朗运动,但受到流动性冲击,在此期间,没有交易是可能的,股票动态被修改。流动性制度是由一个两状态马尔可夫链。我们推导出了在两种情况下(i)流动性冲击的小概率;(ii)快速规模的流动性状态转换的最优消费和投资计划的渐近效果冻结。得到了无限水平上对数效用最大化和双曲效用最大化的显式公式。我们还推导出相应的效用损失,并与Diesinger,Kraft和Seifried(2009)最近的相关有限时域模型进行比较。

英文摘要:

We study the effect of liquidity freezes on an economic agent optimizing her utility of consumption in a perturbed Black-Scholes-Merton model. The single risky asset follows a geometric Brownian motion but is subject to liquidity shocks, during which no trading is possible and stock dynamics are modified. The liquidity regime is governed by a two-state Markov chain. We derive the asymptotic effect of such freezes on optimal consumption and investment schedules in the two cases of (i) small probability of liquidity shock; (ii) fast-scale liquidity regime switching. Explicit formulas are obtained for logarithmic and hyperbolic utility maximizers on infinite horizon. We also derive the corresponding loss in utility and compare with a recent related finite-horizon model of Diesinger, Kraft and Seifried (2009).

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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