iShares 20+ Year Treasury Bond ETF
The benchmark ETF for long-dated US government bonds, holding Treasuries with 20+ years to maturity. Widely used to express interest-rate views due to its high duration.
- Listing
- TLT on Nasdaq Global Market MIC XNMS
- Type
- ETF
- Manager
- BlackRock
- Strategy
- Long-duration US Treasury bonds
- Domicile
- United States
- Size
- $45.4bn — net assets of the whole series, all share classes, as reported at 2026-02-28
Fund identity
iShares 20+ Year Treasury Bond ETFSEC series S000004360 · iSHARES TRUST
A single share class (SEC class C000012090).
Series and class identifiers and their names come from the SEC’s Investment Company Series and Class report — the registry that assigns them, not our own naming. Tracks the ICE US Treasury 20+ Year Bond Index. Our covered Treasury asset is the 10-year, a different point on the curve, so it is deliberately not linked.
Where the size figure comes from
| Reported | $45.4bn |
| What it counts | net assets of the whole series, all share classes |
| As of | 2026-02-28 |
| Source | SEC N-PORT data set |
| Fund LEI | 549300WWURKS1JGBZU59 |
Our earlier undated figure was $50bn; this one carries the reporting date above and moves only when the fund files again.
Approximate reference values from public sources · seed-0.7 · marketcap-1 · 2026-08-30 · not real-time. See data & methodology.
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