Fidelity SAI U.S. Treasury Bond Index Fund 

This fund primarily allocates its capital, with a minimum of 80%, to fixed-income instruments that are part of the Bloomberg U.S. Treasury Index. Its portfolio maintains a dollar-weighted average maturity that is consistently one year or longer. To closely mirror the performance of the Bloomberg U.S. Treasury Index, the investment adviser employs sophisticated statistical sampling. This approach involves analyzing various factors including duration, maturity, interest rate sensitivity, security structure, and credit quality, allowing them to achieve similar returns with a more focused selection of underlying securities.