iShares 15+ Year Australian Government Bond ETF (ALTB) — Review & Analysis

ALTB tracks the Bloomberg AusBond Govt 15+ Yr Index — Australian Commonwealth and state government bonds with at least 15 years to maturity. AUM is $171.04 million as at May 2026 with a competitive 0.15% p.a. management fee — among the cheapest fixed income ETFs on the ASX. Compare ALTB across the fixed income cohort on our fixed income ETF page or use the Compare ETFs tool to put it side-by-side with IAF or VBND.

The income methodology is the longest-duration bond exposure on the ASX. Where IAF (iShares Core Composite Bond, 0.10%) holds a broad Australian bond mix with average duration around 5-6 years, ALTB concentrates exclusively in long-end bonds with duration typically 15+ years. That long-duration positioning makes ALTB highly sensitive to interest rate changes — when yields fall, ALTB rises sharply; when yields rise, ALTB falls hard.

ALTB's closest peers are IAF, VAF and other broad Australian bond ETFs, but none isolate the long-duration segment the way ALTB does. The structural use case is portfolio duration management — investors who want a counterweight to short-term cash exposure, or who are positioning for an RBA easing cycle, use long-duration bonds to capture the rate-cut tailwind.

ALTB is unhedged (irrelevant for AUD-denominated Australian government bonds). The 15+ year structure means returns are dominated by interest rate movements rather than credit risk — there is essentially no default risk on Australian Commonwealth Government bonds. Our bond and fixed income ETFs guide covers ALTB alongside every bond option on the ASX.