Deep Hedging with Market Impact

• URL: http://arxiv.org/abs/2402.13326v2
• Date: Thu, 22 Feb 2024 21:25:42 GMT
• Title: Deep Hedging with Market Impact
• Authors: Andrei Neagu and Fr\'ed\'eric Godin and Clarence Simard and Leila Kosseim
• Abstract summary: We propose a novel general market impact dynamic hedging model based on Deep Reinforcement Learning (DRL) The optimal policy obtained from the DRL model is analysed using several option hedging simulations and compared to commonly used procedures such as delta hedging.
• Score: 0.20482269513546458
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Dynamic hedging is the practice of periodically transacting financial instruments to offset the risk caused by an investment or a liability. Dynamic hedging optimization can be framed as a sequential decision problem; thus, Reinforcement Learning (RL) models were recently proposed to tackle this task. However, existing RL works for hedging do not consider market impact caused by the finite liquidity of traded instruments. Integrating such feature can be crucial to achieve optimal performance when hedging options on stocks with limited liquidity. In this paper, we propose a novel general market impact dynamic hedging model based on Deep Reinforcement Learning (DRL) that considers several realistic features such as convex market impacts, and impact persistence through time. The optimal policy obtained from the DRL model is analysed using several option hedging simulations and compared to commonly used procedures such as delta hedging. Results show our DRL model behaves better in contexts of low liquidity by, among others: 1) learning the extent to which portfolio rebalancing actions should be dampened or delayed to avoid high costs, 2) factoring in the impact of features not considered by conventional approaches, such as previous hedging errors through the portfolio value, and the underlying asset's drift (i.e. the magnitude of its expected return).

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