Schwab U.S. Aggregate Bond Index Fund (SWAGX) is a passively managed open-end mutual fund that seeks to track the total return of the Bloomberg U.S. Aggregate Bond Index, a broad benchmark for the U.S. investment-grade taxable bond market. The fund invests at least 90% of its net assets in securities included in the index, including U.S. Treasuries, government-related bonds, corporate bonds, mortgage-backed securities, commercial mortgage-backed securities, and asset-backed securities publicly available in the United States; its portfolio comprises approximately 11,172 holdings across security types such as U.S. government and agency bonds (45.37%), mortgage-backed securities (24.05%), and corporate bonds (23.72%), with allocations by maturity including 22.86% in 1-3 years, 21.19% in 3-5 years, and weighted average maturity of 8.02 years. Launched on February 23, 2017, and domiciled in the United States, the fund operates with a low gross/net expense ratio of 0.04%, no investment minimums, and monthly income distributions, serving as a core fixed-income component for individual and institutional investors targeting intermediate core bond exposure. As of December 16, 2025, total net assets stand at $5.65 billion, with a net asset value of $9.04 and shares outstanding of 625.8 million. The fund maintains a stable management team led by Mark McKissick, Matthew Hastings, Steven Hung, and Alfonso Portillo since inception, with no reported acquisitions, mergers, strategic alliances, or significant operational changes in the past 1-2 years; portfolio turnover remains moderate at 41.14% as of November 30, 2025.