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The iShares 20+ Year Treasury Bond ETF (TLT) is an exchange-traded fund that seeks to track the performance of an index composed of U.S. Treasury securities with maturities greater than 20 years. The ETF is managed by BlackRock and trades under the ticker TLT on NYSE Arca.
Classified as a long-term U.S. government bond ETF, TLT aims to reflect, before fees and expenses, the aggregate performance of long-duration U.S. Treasury bonds included in its benchmark index.
To achieve this objective, the fund employs a passive management strategy, maintaining a portfolio that seeks to replicate the composition and weighting of the index.
TLT’s benchmark index is composed of U.S. Treasuries with maturities exceeding 20 years, weighted by float-adjusted market capitalization, with periodic reviews to remove securities approaching maturity and include newly eligible issuances.
Diversification and sector exposure
TLT provides exposure to the long-term segment of the U.S. government bond market. This structure concentrates the ETF on a specific portion of the yield curve, resulting in higher sensitivity to interest rate movements, inflation expectations, and long-term monetary policy outlooks.
Structure and costs
Shares of TLT are traded on the secondary market, while creation and redemption of shares are carried out by authorized participants, a mechanism that helps keep the ETF’s market price close to its net asset value (NAV).
The fund features a low expense ratio, typical of passively managed fixed-income ETFs, and does not charge a performance fee. TLT makes periodic income distributions, derived from interest payments on the U.S. Treasury securities held in its portfolio. The ETF has a single share class and trades exclusively under the ticker TLT.
History and evolution of the ETF
The iShares 20+ Year Treasury Bond ETF was launched in 2002, during a period of rapid growth in the ETF industry and increasing investor demand for long-term fixed-income exposure.
Since its inception, TLT has been widely used in portfolio allocation strategies focused on diversification, duration exposure and portfolio diversification during certain market environments.
Between 2020 and 2024, the ETF reflected significant fluctuations in long-term U.S. interest rates, driven by shifts in monetary policy, inflation dynamics, and global fixed-income market flows.
