The fund seeks to provide investment returns that correspond, before fees and expenses, generally to the performance of the Fidelity Digital Health Index. Normally investing at least 80% of assets in securities included in the Fidelity Digital Health Index and in depositary receipts representing securities included in the index. The Fidelity Digital Health Index is designed to reflect the performance of a global universe of companies across the market capitalization spectrum providing healthcare records management, connected healthcare devices, surgical robotics, telemedicine, and other technology-enabled healthcare products and services.