The Invesco Solar ETF (TAN) seeks to mirror the performance of the MAC Global Solar Energy Index. To achieve this, the Fund commits a minimum of 90% of its total capital to the various equity instruments, including ordinary shares, American Depositary Receipts (ADRs), and Global Depositary Receipts (GDRs), that make up its underlying benchmark. This particular index is comprised solely of companies operating within the solar energy industry. The index's performance is computed on a net return basis, which accounts for the withholding of relevant taxes for investors not residing in the country of origin. Both the ETF's holdings and the benchmark index are adjusted and rebalanced every quarter.