Strategy. The Underlying Index is designed to reflect the performance of a selection of companies that exhibit certain environmental, social and governance (ESG) characteristics, while also seeking to provide broad-market, core exposure to publicly traded equity securities issued by companies domiciled in emerging market countries. The Underlying Index is designed to minimize tracking differences relative to the Northern Trust Emerging Markets Large Cap Index SM (the Parent Index) while also seeking (a) an aggregate higher scoring of certain ESG characteristics, as measured by the Northern Trust ESG Vector Score (ESG Vector Score) described below, and (b) reduction of aggregate climate-related risk, as measured by certain carbon-related risk metrics, each relative to the Parent Index. The Underlying Index also excludes certain companies … Show more… The Underlying Index is designed to reflect the performance of a selection of companies that exhibit certain environmental, social and governance (ESG) characteristics, while also seeking to provide broad-market, core exposure to publicly traded equity securities issued by companies domiciled in emerging market countries. The Underlying Index is designed to minimize tracking differences relative to the Northern Trust Emerging Markets Large Cap Index SM (the Parent Index) while also seeking (a) an aggregate higher scoring of certain ESG characteristics, as measured by the Northern Trust ESG Vector Score (ESG Vector Score) described below, and (b) reduction of aggregate climate-related risk, as measured by certain carbon-related risk metrics, each relative to the Parent Index. The Underlying Index also excludes certain companies by using controversial business involvement and norms-based screens. The Parent Index is a sub-index of the Northern Trust Global Index SM , where eligible securities are limited to those of companies that are domiciled in emerging market countries and designated as large- or mid-capitalization companies by NTI, in its capacity as Index Provider (the Index Provider). As of December 31, 2023 , the Index Provider classifies the following as emerging market countries: Brazil, Chile, China, Colombia, Czech Republic, Egypt, Greece, Hungary, India, Indonesia, Kuwait, Malaysia, Mexico, Morocco, Peru, Philippines, Poland, Qatar, Saudi Arabia, South Africa, South Korea, Taiwan, Thailand, Turkey and United Arab Emirates. The Index Provider applies an ESG Vector Score to each of the companies in the Parent Index. The ESG Vector Score is designed to rank companies based on their management of and exposure to material ESG metrics as defined by the Sustainability Accounting Standards Board (SASB) Standards and a corporate governance score for each company. NTI calculates and maintains ESG Vector Scores for companies using data from third-party data providers. The SASB Standards identify financially material ESG issues for a company based on its industry classification within the following five dimensions: (i) environmental; (ii) social capital; (iii) human capital; (iv) business model and innovation; and (v) leadership and governance. The preliminary ESG score is then adjusted up or down based on a quantitative assessment of how a company is managing the risks associated with those material ESG issues relative to its peers based on the recommendations of the Task Force on Climate-related Financial Disclosures to evaluate a company through governance, strategy and risk management lenses. The adjusted ESG score generates 80% of the ESG Vector Score. Finally, a distinct corporate governance score is applied to each company with respect to its (i) board and management quality and integrity; (ii) board structure; (iii) ownership and shareholder rights; (iv) remuneration; (v) financial reporting; and (vi) stakeholder governance, which generates 20% of the ESG Vector Score. In addition to applying the ESG Vector Score, the Index Provider uses data from Institutional Shareholder Services ESG Solutions to assess carbon emissions intensity, carbon reserves and a carbon risk rating for each company. Carbon emissions intensity measures (i) direct greenhouse gas emissions from sources controlled or owned by the company (e.g., emissions associated with fuel combustion in boilers, furnaces, or vehicles); and (ii) indirect greenhouse gas emissions associated with the purchase of electricity, steam, heat or cooling against sales by the company. Carbon reserves measure the total estimated greenhouse gas emissions attributable to a companys fossil fuel reserve assets. The ISS Carbon Risk Rating provides an assessment of a companys ability to mitigate the risks of transition to a lower carbon economy based on its specific baseline carbon risk exposure. At the time of each reconstitution of the Underlying Index, the Index Provider uses an optimization process to select and weight securities in the Parent Index to seek to (i) minimize the potential for tracking differences for the Underlying Index; (ii) increase the aggregate ESG Vector Score for the companies in the Underlying Index; (iii) reduce the aggregate carbon emissions intensity and aggregate carbon reserves of the companies in the Underlying Index; and (iv) improve the aggregate carbon risk rating of the companies in the Underlying Index, each relative to the Parent Index. It is possible that the Underlying Index will include (and therefore the Fund could invest in) securities that, individually, have a low ESG Vector Score or high carbon-related risk relative to the aggregate ESG score or carbon-related risk of the Parent Index. The optimization also includes region, country, sector, industry group, constituent, liquidity, turnover and weight constraints so that these characteristics in the Underlying Index vary within acceptable bands relative to the Parent Index. Certain eligible securities are excluded from the Underlying Index by the Index Provider, using proprietary screening definitions and data from Sustainalytics and other independent ESG data providers, which may change from time to time. Excluded companies include those which are involved in (i) verified infringement of established international initiatives and guidelines, including United Nations Global Compact Principles and Organisation for Economic Co-operation and Development (OECD) Guidelines for Multinational Entities; (ii) the production of tobacco; and (iii) manufacturing of controversial weapons. Excluded companies also include those which derive a certain percentage of revenue (e.g., 5% or more) from (a) manufacturing of civilian firearms; (b) manufacture, retailing, and distribution of small arms (assault and non-assault) weapons or components; (c) manufacturing of conventional weapons or providing support services through military contracting; (d) thermal coal extraction; (e) coal-fired energy generation; (f) oil sands and shale; (g) arctic oil with weak management of carbon within their products and services; (h) the retail sale of tobacco and tobacco related products or services; and (i) the running of private prisons. For issuers domiciled in emerging markets, an additional governance screen is applied and companies that do not meet the following criteria are ineligible: companies with scores that fall below the emerging market company average in the corporate governance categories of board structure, ownership and shareholder rights, remuneration, and audit and financial reporting.?The above-described exclusionary screens are applied with each reconstitution of the Underlying Index. As of December 31, 2023 , the Underlying Index was comprised of 253 constituents with market capitalizations ranging from $ 1.7 billion to $ 475 billion. The Underlying Index is reconstituted quarterly under normal market conditions. The Fund generally reconstitutes its portfolio in accordance with the Underlying Index . NTI uses a passive or indexing approach to try to achieve the Funds investment objective. Unlike many investment companies, the Fund does not try to beat the index it tracks and does not seek temporary defensive positions when markets decline or appear overvalued. NTI uses a representative sampling strategy to manage the Fund. Representative sampling is investing in a representative sample of securities that collectively has an investment profile similar to the Underlying Index. The Fund may or may not hold all of the securities that are included in the Underlying Index. The Fund reserves the right to invest in substantially all of the securities in its Underlying Index in approximately the same proportions (i.e., replication) if NTI determines that it is in the best interest of the Fund. Under normal circumstances, the Fund will invest at least 80% of its total assets (exclusive of collateral held from securities lending) in the securities of the Underlying Index and in American Depositary Receipts (ADRs) and Global Depositary Receipts (GDRs) (collectively Depositary Receipts) based on the securities in the Underlying Index. The Fund may also invest up to 20% of its assets in cash and cash equivalents, including shares of money market funds advised by NTI or its affiliates, futures contracts, options on futures contracts and forward currency contracts, as well as securities not included in the Underlying Index, but which NTI believes will help the Fund track its Underlying Index. The Fund usually, but not always, pur sues a strategy of being fully invested by exposing all or a portion of its cash to the performance of certain markets by purchasing index futures contracts (also known as equitization). This is intended to cause the Fund to perform as though its cash were actually invested in those markets. This futures exposure may or may not match the Funds Underlying Index and create indirect exposure to companies that have been excluded from the Underlying Index. The Fund will not invest directly in securities that have been excluded from the Funds Underlying Index. The Underlying Index is created and sponsored by NTI, as the Index Provider. NTI also serves as the investment adviser to the Fund. The Index Provider determines the composition and relative weightings of the securities in the Underlying Index and publishes information regarding the market value of the Underlying Index. The Fund may lend securities representing up to one-third of the value of the Funds total assets (including the value of the collateral received). The Fund is non-diversified under the Investment Company Act of 1940 (1940 Act), as amended, and may invest more of its assets in fewer issuers than diversified funds. From time to time the Fund may focus its investments ( i.e., invest more than 15% of its total assets) in one or more particular countries or geographic regions. As of December 31, 2023, the Fund focused its investments in China, Taiwan, India, South Korea and Brazil. Industry Concentration Policy . The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. Show less