F/m Ultrashort Treasury Inflation-Protected Security (TIPS) ETF (RBIL) is a passively managed exchange-traded fund that seeks to track the Bloomberg U.S. Ultrashort TIPS 1-13 Months Total Return Unhedged USD Index by investing in ultrashort Treasury Inflation-Protected Securities with maturities of 13 months or less and an average duration under one year; provides inflation protection through CPI-indexed principal adjustments; and offers monthly distributions, tax efficiency via ETF structure, low interest rate sensitivity, and high liquidity as a cash alternative. The ETF holds a concentrated portfolio primarily in U.S. Treasury Inflation-Protected Bonds such as 0.125% series maturing April 2026, July 2026, October 2026, and January 2026, along with minimal cash equivalents. RBIL operates within the short-term inflation-protected bond segment, targeting investors seeking inflation-hedged cash equivalents over traditional money market funds or longer-duration TIPS ETFs. Launched on February 24, 2025, by F/m Investments LLC, an independent $18 billion asset manager founded in 2018 and headquartered in Washington, DC, the ETF debuted on Nasdaq with $50 million in seed capital from lead market maker Jane Street as part of F/m's U.S. Benchmark Series. Recent developments include growth to approximately $70 million in assets under management by mid-2025, ongoing monthly dividend payments reaching yields around 4%, and F/m's broader expansions such as the October 2025 launch of the F/m Emerald Special Situations ETF (SPIT) in partnership with Emerald Advisers, the first ultrashort municipal bond ETF (ZMUN), and a strategic transfer of its U.S. Credit Series ETFs to Nasdaq for enhanced efficiency.