Australia’s Treasury forecasts higher inflation, bigger GDP hit from Iran war in new analysis

Oil slipped just over 2% after an Iraq-Kurdish supply deal even as Iran-related risks persist. Australia's Treasury analysis shows a short-term scenario with oil at $100/bbl H1 would lift inflation by 0.75 percentage points and reduce output by 0.2%, while a prolonged $120/bbl scenario would raise inflation by 1.25ppt and subtract about 0.6% from GDP around 2027. The report signals meaningful near-term inflationary pressure and a material medium-term hit to growth, reinforcing a risk-off outlook for markets sensitive to energy and commodity prices.

Analysis

The immediate economic transmission is not just higher pump prices but a durable input-cost shock to agriculture, utilities and freight chains: sustained oil at $100–$120 for H1 converts into a 6–12 month passthrough to fertiliser and shipping costs, compressing agricultural producer margins and lifting fertiliser producer EBITDA by a levered amount (30–50%+ upside on spot-driven volumes). Exporters of LNG and thermal coal (Australia, Indonesia, US seaborne miners) see an earnings windfall that flows to cashflow within quarters, while currency moves (AUD, IDR strength) will reprice local capex economics and tax take, muting some free-cashflow for equities domiciled there.

On the macro front, markets should price a higher-for-longer rate path: a persistent 1.0–1.25ppt inflation surprise materially increases the probability that central banks extend restrictive policy windows by 3–9 months, amplifying credit spread sensitivity in lower-tier credit and EM sovereigns. Supply-side responses (US shale, LNG FIDs) are slow — expect 12–36 month lags for material supply additions — which keeps a contested floor under commodity cash prices but also raises policy and geopolitical tail risks that can snap prices lower fast.

Catalysts that can reverse or amplify this regime are discrete and time-staggered: short-term diplomatic/SPR moves and Chinese demand data drive days–weeks volatility; US shale rig counts and announced FIDs drive months-to-year repricing; and multi-year capex decisions determine whether $120 is transitory or structural. The sensible risk-managed stance is directional exposure to producers while layering event-driven hedges for the high-probability reversals listed above.

Key Decisions for Investors

• Long EOG Energy (EOG) via 9–12 month call spread (size 1.5–2% NAV): target payoff ~2.5x if Brent averages >$95 over next 12 months. Hedge with 0.5% NAV short XLY to protect against acute demand-destruction scenarios.
• Long fertiliser producers CF Industries (CF) or Mosaic (MOS) outright (size 1–2% NAV) and overlay 6–9 month calls for convexity; thesis: 30–50% EBITDA upside on sustained fertiliser price shock. Risk: softening crop prices or destocking — stop-loss at 18% drawdown or if global fertiliser spreads compress by 25%.
• Long thermal-coal exposure via Peabody Energy (BTU) (size 1% NAV) for tactical 3–9 month capture of seaborne thermal tightness; pair with a 6–12 month put (protect 25% downside) to guard against rapid diplomatic resolution/SPR releases.
• Inflation-insurance: buy 5–7 year TIPS (or TIP ETF) sized to 2–3% NAV as portfolio hedge against the 1.0–1.25ppt inflation scenario; reduces tail risk from policy mistakes and preserves real capital if inflation remains sticky.