iShares US Aggregate Bond UCITS ETF USD (Acc) (IUAA.L) is an exchange-traded fund that seeks to track the performance of the Bloomberg US Aggregate Bond Index, comprising US dollar-denominated investment grade bonds including government securities such as United States Treasury notes and bonds; government-related bonds from issuers like Federal National Mortgage Association, Federal Home Loan Mortgage Corporation, and Government National Mortgage Association; securitised bonds such as mortgage-backed securities and asset-backed securities; and corporate bonds from issuers including JPMorgan Chase & Co., Bank of America Corp., Morgan Stanley, and Wells Fargo & Company. The ETF employs a physical sampling replication method and is accumulating in structure, with an ongoing charge of 0.25% and assets under management exceeding EUR 3.5 billion as of recent data. It primarily targets institutional and retail investors seeking diversified exposure to the US investment-grade fixed income market, with listings on the London Stock Exchange, SIX Swiss Exchange, and Bolsa Mexicana de Valores; the fund is domiciled in Ireland and authorised for distribution across Europe including the United Kingdom, Germany, Switzerland, and others. Launched on April 13, 2017, the ETF is issued by iShares II Public Limited Company, a BlackRock-managed UCITS platform headquartered in Dublin, Ireland. In recent developments, the fund has experienced substantial assets under management growth amid heightened interest in US bond exposure following Federal Reserve rate adjustments, alongside BlackRock's ongoing enhancements to iShares UCITS ETF liquidity programs and securities lending initiatives yielding up to 0.04% returns as of September 2025.