Index Time Series for iShares U.S. ETF Trust - iShares Interest Rate Hedged U.S. Aggregate Bond ETF. The frequency of the observation is daily. Moving average series are also typically included. The underlying index is designed to minimize the interest rate risk exposure of a portfolio composed of U.S. dollar-denominated, investment-grade bonds. The fund seeks to achieve its investment objective by investing, under normal circumstances, at least 80% of its net assets, plus the amount of any borrowings for investment purposes, in component securities and instruments in the fund"s underlying index. It is non-diversified.

Federal Public Debt: Cumulative 12 Months Average Cost: Domestic: National Treasury Bills在2019-04达10.311 % 每年，相较于2019-03的10.419 % 每年有所下降。Federal Public Debt: Cumulative 12 Months Average Cost: Domestic: National Treasury Bills数据按月度更新，2005-12至2019-04期间平均值为11.860 % 每年，共161份观测结果。该数据的历史最高值出现于2006-03，达18.201 % 每年，而历史最低值则出现于2014-04，为9.988 % 每年。CEIC提供的Federal Public Debt: Cumulative 12 Months Average Cost: Domestic: National Treasury Bills数据处于定期更新的状态，数据来源于National Treasury Secretariat，数据归类于Brazil Premium Database的Government and Public Finance – Table BR.FC024: Federal Public Debt: Held by the Public: Cumulative 12 Months Average Cost。

Federal Public Debt: Cumulative 12 Months Average Cost: Domestic: Financial Treasury Bills在2019-04达6.360 % 每年，相较于2019-03的6.359 % 每年有所增长。Federal Public Debt: Cumulative 12 Months Average Cost: Domestic: Financial Treasury Bills数据按月度更新，2005-12至2019-04期间平均值为11.400 % 每年，共161份观测结果。该数据的历史最高值出现于2006-01，达19.415 % 每年，而历史最低值则出现于2019-03，为6.359 % 每年。CEIC提供的Federal Public Debt: Cumulative 12 Months Average Cost: Domestic: Financial Treasury Bills数据处于定期更新的状态，数据来源于National Treasury Secretariat，数据归类于Brazil Premium Database的Government and Public Finance – Table BR.FC024: Federal Public Debt: Held by the Public: Cumulative 12 Months Average Cost。