When using mean-variance optimization (MVO) models, ESG-related issues most likely:

ESG factors can create new sub-asset classes(e.g.,green bonds, impact investing funds) that affectrisk-return trade-offs in mean-variance optimization (MVO) models.

MVO assumes that ESG factors can impact risk-adjusted returns, meaning ESG data can influenceasset weightings and expected volatility.

Regional asset mixes (B) are still relevant for ESG investing, and ESG factorsdo impact expected returns and volatility (C).