NULC takes the popular ESG theme and slices it specifically within the large-cap space. The funds underlying index is derived from the MSCI USA Index, with further screening for ESG criteria. Environmental factors include impact on climate change, natural resource use, and emission management. Social categories include relationships with employees and suppliers, and product safety. Lastly, the governance criteria look at corporate governance and business ethics. Additionally, the index stays away from companies with involvement in alcohol, tobacco, firearms, gambling and nuclear weapons. The portfolio is weighted according to a multi-factor optimization algorithm that aims to keep holdings and performance similar to the parent index. The underlying index is rebalanced and reconstituted quarterly starting each February. Sibling fund NUSC applies the same strategy to US small caps.