Fidelity Low Duration Bond Factor ETF (FLDR) is an exchange-traded fund that seeks to provide investment returns corresponding to the Fidelity Low Duration Investment Grade Factor Index before fees and expenses. Launched on June 12, 2018, and issued by Fidelity Merrimack Street Trust, a Fidelity Investments entity headquartered in Boston, Massachusetts, the ETF normally invests at least 80% of its assets in securities included in the index, which comprises U.S. investment-grade floating-rate notes and fixed-rate U.S. Treasury notes with maturities of seven to ten years, targeting a portfolio duration of one year or less to balance interest rate risk and credit risk. It offers exposure to a diversified portfolio of investment-grade bonds from issuers across sectors, including financials such as Santander Holdings USA Inc., John Deere Capital Corp., Oracle Corp., Sumitomo Mitsui Financial Group Inc., and HSBC Holdings PLC; the fund maintains a net expense ratio of 0.15% and trades on U.S. exchanges for investors seeking low-duration fixed income with income generation potential. FLDR operates passively to replicate index performance, serving target markets of institutional and retail investors focused on ultrashort bond strategies within the broader fixed income asset class. In recent developments, the ETF achieved a Morningstar Gold rating upgrade and doubled its assets under management from $330 million at the start of 2024 to $660 million by year-end, reflecting strong investor interest amid market uncertainty; it further crossed the $1 billion AUM milestone, underscoring its growth in the low-duration bond category.