The investment seeks to track the performance of the MSCI ACWI Sustainable Development Index. The fund generally will invest at least 80% of its assets in the component securities of the underlying index and in investments that have economic characteristics that are substantially identical to the component securities of the underlying index. The index is composed of companies that derive a majority of their revenue from products and services that address at least one of the world's major social and environmental challenges as identified by the United Nations Sustainable Development Goals.