iShares 3-7 Year Treasury Bond ETF (IEI US) – Portfolio Construction MethodologyThe underlying ICE US Treasury 3-7 Year Bond Index targets USD-denominated, fixed-rate, nominal U.S. Treasury notes and bonds with remaining maturities ≥3 and <7 years. Eligible issues must have at least USD 300m par outstanding after deducting Federal Reserve SOMA holdings; TIPS, STRIPS, floaters and agency/Treasury-related instruments are excluded. Constituents enter when their remaining term ages into the 3–7 year window and ...