ETF v praxi
IBTA — iShares US Treasury Bond: an ETF breakdown for US government bonds
Key takeaways
- IBTA tracks the Bloomberg US Treasury Bond Index — US government bonds across maturities.
- TER of around 0.07% per year is very low; both EUR-hedged and unhedged share classes exist — check before buying.
- Duration of 5–7 years means sensitivity to interest rate changes — when rates rise, the fund temporarily falls.
- Stabilising portfolio role stems from the historical safe-haven property of Treasuries in crises.
- For lower interest rate risk consider a short-term version; for global bonds consider AGGH.
What is IBTA and why US government bonds
IBTA (iShares US Treasury Bond UCITS ETF) tracks the Bloomberg US Treasury Bond index, which includes US government bonds of various maturities issued by the US government (Treasury bonds, notes and bills). US Treasuries are historically considered one of the safest assets in the world — the US as an issuer has carried AAA or AA+ ratings.
TER and technical parameters
The TER is approximately 0.07% per year — verify the current figure on justETF. The fund is accumulating (Acc) with Irish domicile. EUR-hedged share classes also exist — for European investors hedging is generally appropriate for bonds, because USD/EUR movements would otherwise dominate the return. Check which share class you are buying.
Composition and duration
The index includes short-term bonds (bills up to 1 year), medium-term bonds (notes 2–10 years) and long-term bonds (bonds 10–30 years). The fund's overall duration is typically in the range of 5–7 years — meaning sensitivity to interest rate changes: a 1 percentage point rise in rates reduces the fund's price by approximately the duration in percentage terms. Always verify the current duration on justETF or at iShares.
Stabilising role in the portfolio
IBTA plays a different role in a portfolio from equities:
- During equity crises it historically rises (flight to quality).
- It generates predictable interest income (reinvested in the accumulating version).
- It enables rebalancing — you sell what is holding value and buy what has fallen.
When IBTA makes sense and when it does not
IBTA makes sense for investors who:
- are looking for a stabiliser for an equity portfolio,
- prefer exposure purely to government (not corporate) bonds,
- understand interest rate risk and actively monitor the interest rate environment.
Conversely, in a rising rate environment IBTA can lose value significantly in the short term — that is its key weakness. If you want less rate sensitivity, look for an ETF with a shorter duration (short-term Treasury). Compare with AGGH — which covers global bonds — in the AGGH breakdown. How the risks of bonds and equities relate to each other is visualised in what is risk and how to measure it.
FAQ
How does IBTA differ from AGGH?
IBTA focuses exclusively on US government bonds. AGGH covers the entire global bond market including corporate bonds and bonds from other countries. AGGH is broader and more diversified.
Is IBTA risk-free?
No. The main risks are interest rate risk (bond prices fall when rates rise) and currency risk for unhedged share classes. US credit risk is minimal, but not zero.
What share of IBTA is appropriate in a portfolio?
It depends on your risk profile, age and investment horizon. A conservative investor might hold 40–60%, an aggressive investor 0–20%. There is no universal number — the key is a conscious decision.