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• W4382721534 abstract "Abstract We study an optimal liquidation problem with multiplicative price impact in which the trend of the asset price is an unobservable Bernoulli random variable. The investor aims at selling over an infinite time horizon a fixed amount of assets in order to maximise a net expected profit functional, and lump-sum as well as singularly continuous actions are allowed. Our mathematical modelling leads to a singular stochastic control problem featuring a finite-fuel constraint and partial observation. We provide a complete analysis of an equivalent three-dimensional degenerate problem under full information, whose state process is composed of the asset price dynamics, the amount of available assets in the portfolio, and the investor’s belief about the true value of the asset’s trend. Its value function and optimal execution rule are expressed in terms of the solution to a truly two-dimensional optimal stopping problem, whose associated belief-dependent free boundary $b$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>b</mml:mi> </mml:math> triggers the investor’s optimal selling rule. The curve $b$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>b</mml:mi> </mml:math> is uniquely determined through a nonlinear integral equation, for which we derive a numerical solution through an application of the Monte Carlo method. This allows us to understand the value of information in our model as well as the sensitivity of the problem’s solution with respect to the relevant model parameters." @default.
• W4382721534 created "2023-07-01" @default.
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• W4382721534 date "2023-06-29" @default.
• W4382721534 modified "2023-09-27" @default.
• W4382721534 title "Optimal execution with multiplicative price impact and incomplete information on the return" @default.
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• W4382721534 doi "https://doi.org/10.1007/s00780-023-00508-y" @default.
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