The primary goal of this investment vehicle is to emulate the returns of the Calvert US Large-Cap Core Responsible Index, which serves as a gauge for the financial performance of significant U.S. companies. Generally, the fund allocates a minimum of 95% of its net assets, inclusive of any investment-related borrowings, into the holdings that make up this index. This index specifically features the common equities of large enterprises whose business practices align with the Calvert Principles for Responsible Investment.