Fidelity Investment Grade Securitized ETF (FSEC) is an exchange-traded fund that seeks to provide investment results corresponding to the total return performance of the Bloomberg U.S. Investment Grade Securitized Index; the fund invests at least 80% of its assets in securities included in the index, which comprises investment-grade securities backed by mortgages, asset pools, or receivables. FSEC offers exposure to a diversified portfolio of residential and commercial mortgage-backed securities, asset-backed securities, and collateralized loan obligations issued or guaranteed by government-sponsored enterprises such as Fannie Mae, Freddie Mac, and Ginnie Mae; eligible securities must have fixed or floating rates with investment-grade ratings from major agencies. Managed by Fidelity Management & Research Company LLC, a subsidiary of FMR LLC headquartered in Boston, Massachusetts, and founded in 1946, the ETF operates primarily in the U.S. fixed-income market targeting institutional and retail investors seeking income and capital preservation through securitized debt. In late 2024, FSEC launched amid Fidelity's expansion into targeted fixed-income ETFs, aligning with broader strategic shifts toward specialized sector exposures following market volatility in securitized assets; no major acquisitions, partnerships, or reorganizations have been reported for the fund in the past two years, though it benefits from Fidelity's ongoing enhancements to ETF liquidity and tracking efficiency.