Strategic Advisers Fidelity Core Income Fund (FIWGX) is a mutual fund managed by Strategic Advisers LLC, a Fidelity Investments company, that seeks a high level of current income by investing primarily in investment-grade debt securities of medium and high quality, including U.S. and non-U.S. bonds, mortgage-backed securities, repurchase agreements, and derivatives such as interest rate swaps, total return swaps, credit default swaps, and futures contracts; it allocates up to 30% of assets to high yield debt securities, also known as junk bonds, and emerging market debt securities to enhance yield potential while employing leveraging transactions and forward-settling securities to adjust risk exposure. The fund, domiciled in the United States and available exclusively through Fidelity advisory platforms, maintains a diversified portfolio with approximately 88% in U.S. bonds, 7% in non-U.S. bonds, and smaller positions in cash, stocks, and other assets, featuring top holdings like Fidelity SAI Total Bond Fund (around 22%), Fidelity SAI U.S. Treasury Bond Index Fund (7%), Fidelity SAI Intermediate Treasury Bond Index Fund (4%), Fidelity SAI Long-Term Treasury Bond Index Fund (3%), and Fidelity SAI International Credit Fund (2%). Launched on October 16, 2018, and headquartered at 82 Devonshire Street in Boston, Massachusetts, the fund targets intermediate core-plus bond investors with a low expense ratio of 0.16%-0.17%, no minimum initial investment, monthly distributions yielding about 4%, and total net assets exceeding $80 billion as of late 2025; it operates globally across fixed income markets in the United States, Canada, and emerging regions without notable subsidiaries or recent major changes such as acquisitions, partnerships, funding rounds, or strategic shifts reported in the past one to two years.