BlackRock expects most fixed-income category returns to fall over time, based on its recently published quarterly capital markets assumptions. It forecasts a 4.7% annualized return over five years and a 20-year return of 3.9% for the broad-based Bloomberg U.S. Aggregate Bond index.
U.S. government bonds with at least 10 years to maturity have expected 10- and 20-year returns of 3.3% and 3.2%, respectively, but the highest projected volatility (13.4%).