Balancing Profit, Risk, and Sustainability for Portfolio Management
- URL: http://arxiv.org/abs/2207.02134v1
- Date: Mon, 6 Jun 2022 08:38:30 GMT
- Title: Balancing Profit, Risk, and Sustainability for Portfolio Management
- Abstract summary: We develop a novel utility function with the Sharpe ratio representing risk and the environmental, social, and governance score (ESG) representing sustainability.
We show that our system outperforms MADDPG while improving on deep Q-learning approaches by allowing for continuous action spaces.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Stock portfolio optimization is the process of continuous reallocation of
funds to a selection of stocks. This is a particularly well-suited problem for
reinforcement learning, as daily rewards are compounding and objective
functions may include more than just profit, e.g., risk and sustainability. We
developed a novel utility function with the Sharpe ratio representing risk and
the environmental, social, and governance score (ESG) representing
sustainability. We show that a state-of-the-art policy gradient method -
multi-agent deep deterministic policy gradients (MADDPG) - fails to find the
optimum policy due to flat policy gradients and we therefore replaced gradient
descent with a genetic algorithm for parameter optimization. We show that our
system outperforms MADDPG while improving on deep Q-learning approaches by
allowing for continuous action spaces. Crucially, by incorporating risk and
sustainability criteria in the utility function, we improve on the
state-of-the-art in reinforcement learning for portfolio optimization; risk and
sustainability are essential in any modern trading strategy and we propose a
system that does not merely report these metrics, but that actively optimizes
the portfolio to improve on them.
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