iShares Core MSCI World UCITS ETF USD (Acc) (IWDA.AS) is an exchange-traded fund that seeks to track the performance of the MSCI World Index by investing in a portfolio of equity securities from large-cap and mid-cap companies across developed markets worldwide; it employs a representative sampling methodology to replicate the index, with an accumulating share class that reinvests dividends; the fund holds diversified positions across sectors including technology, financials, healthcare, and consumer discretionary, with top holdings such as NVIDIA, Microsoft, and Apple. Launched on September 25, 2009, and domiciled in Ireland, the ETF is issued and managed by BlackRock Advisors (UK) Limited under the iShares brand of BlackRock Asset Management Ireland Limited, with primary listings on Euronext Amsterdam (IWDA), London Stock Exchange (SWDA and IWDA), Deutsche Boerse Xetra (EUNL), and other exchanges including Borsa Italiana, SIX Swiss Exchange, and Bolsa Mexicana de Valores. The fund operates globally, registered for sale in over 25 countries across Europe, the Middle East, Asia, and Africa including Austria, Germany, France, the United Kingdom, Switzerland, Saudi Arabia, Singapore, and South Africa, targeting institutional and retail investors seeking broad developed market equity exposure. It was formerly known as iShares MSCI World UCITS ETF (Acc), reflecting a name update to emphasize its core tracking strategy.