Exploring Modern Evolution Strategies in Portfolio Optimization

Ramin Hasani, Etan A Ehsanfar, Greg A Banis, Rusty Bealer, Amir Soroush Ahmadi

Keywords: evolution strategies, portfolio construction, asset allocation, optimization algorithms, JAX API, financial advice

TL;DR: This paper explores the powerful use of black box evolutionary strategies in combination with gpu-enabled JAX in portfolio construction problem.

Abstract: Black-box optimization (BBO) techniques are often the core engine used in combinatorial optimization problems which include multi-asset class portfolio construction. The computational complexity of such evolutionary algorithms, however, is excessively high to the point that finding optimal portfolios in large search spaces becomes intractable and learning dynamics are usually heuristic. To alleviate these challenges, in this paper, we set out to leverage advances in meta-learning-based evolution strategy (ES), Adaptive ES-Active Subspaces, and fast-moving natural ES to improve high-dimensional portfolio construction. Using such modern ES algorithms in a series of risk-aware passive and active asset allocation problems, we obtain orders of magnitude efficiency in finding optimal portfolios compared to vanilla BBO methods. Moreover, as we increase the number of asset classes, our modern suite of BBOs finds better local optima resulting in better financial advice quality.

Submission Number: 14