iShares MSCI EAFE International Index Fund (MDIIX) is an open-end mutual fund managed by BlackRock that seeks to match the performance of the MSCI EAFE Index by investing substantially in its component securities or financial instruments with similar economic characteristics; it maintains at least 80% of its assets in such securities, providing exposure to large- and mid-cap stocks from developed markets in Europe, Australasia, and the Far East, including top holdings such as ASML Holding NV, SAP SE, AstraZeneca PLC, Nestlé SA, and Roche Holding AG. The fund offers Investor A shares with a net expense ratio of 0.35% and related institutional share classes like MAIIX at 0.10%, targeting investors seeking low-cost, passive international equity diversification in the Foreign Large Blend category. Launched on April 9, 1997, and headquartered at BlackRock's principal offices in New York, NY, the fund operates primarily for U.S. investors with global portfolio exposure across countries like Japan, the United Kingdom, France, Switzerland, Germany, and Australia. Recent portfolio manager updates effective June 30, 2025, appointed Jennifer Hsui, CFA, Matt Waldron, CFA, Peter Sietsema, CFA, and Steven White to oversee the fund, reflecting BlackRock's ongoing enhancements to its index fund management team amid stable operations and no major structural changes, acquisitions, or new product launches specific to MDIIX in the past 1-2 years. As of late 2025, net assets stand at approximately $473 million for the Investor A class, with performance closely tracking the benchmark, including a 3.39% return for 2024 and year-to-date gains exceeding 25%.