TIAA-CREF Core Impact Bond Fund Institutional Class (TSBIX) is an actively managed open-end mutual fund that seeks total return, primarily through current income, while giving special consideration to environmental, social, and governance (ESG) criteria; it invests across the broad investment-grade, U.S. dollar-denominated fixed income market in securities demonstrating ESG leadership and/or direct, measurable environmental and social impact, including U.S. government securities, corporate bonds, mortgage-backed securities, and asset-backed securities. The fund's portfolio emphasizes intermediate-term core bond strategies with medium credit quality and moderate interest rate sensitivity, maintaining an effective duration of approximately 6.14 years and a TTM yield of 4.36%, with top holdings typically comprising U.S. Treasury notes and bonds alongside Federal National Mortgage Association securities. Managed by Nuveen, a subsidiary of TIAA with roots tracing to 1898 for Nuveen and 1918 for TIAA, the fund operates from offices in Chicago, Charlotte, and New York, serving institutional and retirement investors globally through its share classes. Recent developments include a rebranding under Nuveen branding from TIAA-CREF nomenclature and ongoing integration of TIAA's investment operations into Nuveen, enhancing its sustainable fixed income capabilities amid a portfolio of approximately $6.4 billion in assets; no major acquisitions, partnerships, or product launches specific to TSBIX were reported in the last 1-2 years, though related global strategies underwent name changes effective May 2025 to emphasize sustainability.