SMI actively invests in investment-grade municipal bonds of any maturity that are exempt from federal income tax and are perceived to support sustainable development. The fund aims to support progress towards sustainable development in alignment with the United Nations Sustainable Development Goals, as well as promote positive social and environmental outcomes, by using HIP (Human Impact + Profit) Ratings. Municipal bonds issued and associated to US states, municipal governments, and its territories are assigned HIP Ratings based on data-driven, quantitative performance measures to determine an estimate of their impact. As an actively managed ETF, SMI applies its own investment techniques and risk analyses to identify buy-sell-or-hold opportunities.