Fidelity Sustainability Bond Index Fund

The fund typically allocates a minimum of 80% of its total assets to fixed-income instruments included in the Bloomberg Barclays MSCI U.S. Aggregate ESG Choice Bond Index. This index comprises U.S. dollar-denominated, investment-grade, fixed-rate debt issues, spanning a variety of categories such as government, corporate, asset-backed, and mortgage-backed securities. Its construction and selection criteria are based on those of the broader Bloomberg Barclays U.S. Aggregate Bond Index.