How the Iran Conflict Is Reshaping Australian Investment Portfolios

A Week That Changed the Market

The escalation of the Iran conflict sent shockwaves through global markets in early March 2026. Oil prices surged 25% in a matter of days. The ASX lost $90 billion in a single session, with banks and miners hit hardest. By the end of the first week of March, more than $100 billion had been wiped from Australian shares.

Then came the partial recovery. Mining stocks led a modest rebound, and the ASX clawed its way back into positive territory for 2026 (just barely, up 0.34% year-to-date). But the market remains fragile, down 3.68% over the past week.

Winners and Losers So Far

Benefiting from the crisis:

• Energy producers. Companies with oil and gas exposure have seen share prices lift as Brent crude prices surge.
• Defence stocks. DroneShield jumped 8.36% in a single session. Defence spending expectations are rising globally.
• Gold miners. The traditional safe haven asset is attracting capital as uncertainty grows.
• Resources broadly. The March 2026 ASX index rebalance saw resource stocks drive major changes to the S&P/ASX 200 composition.

Under pressure:

• Banks. Higher rates sound good for bank margins, but the risk of mortgage stress and rising bad debts is weighing on valuations.
• Consumer discretionary. Companies reliant on household spending face headwinds as cost-of-living pressures intensify.
• Technology. Growth stocks that need cheap capital have been selling off as rate expectations rise.

What History Tells Us

Geopolitical shocks tend to create sharp, short-term market drops followed by recovery. The key question is always whether the shock is temporary or structural.

If the Iran conflict resolves quickly, oil prices retreat, and the RBA holds rates steady, markets could bounce back strongly. The ASX’s long-term track record shows it has recovered from every major geopolitical crisis within 12 to 18 months.

But if the conflict drags on, oil stays above $100 per barrel, and inflation re-accelerates, we could be looking at a more prolonged period of market volatility combined with rising interest rates. That’s a much harder environment for investors.

How to Position Your Portfolio

1. Don’t sell in a panic. The worst investment decisions are made in the first week of a crisis. If your portfolio was well-constructed before the conflict, it can likely weather the storm.

2. Check your diversification. The ASX is heavily weighted to banks and resources. If your portfolio mirrors the index, you’re concentrated in exactly the sectors most affected. Consider whether you have enough exposure to international shares, bonds and defensive assets.

3. Consider your time horizon. If you’re 10+ years from retirement, short-term volatility matters less. If you’re within 5 years of drawing on your investments, a more defensive allocation may be appropriate.

4. Review your super. Your superannuation is invested in the same markets. Check whether your fund’s default option matches your risk tolerance, especially if you’re approaching retirement.

5. Look for opportunity. Market sell-offs create buying opportunities for long-term investors. Quality companies with strong balance sheets often get sold off indiscriminately during crises.

Don’t Go It Alone

Navigating geopolitical uncertainty requires a clear investment strategy, not reactive trading. Find a financial adviser on WealthWorks who can review your portfolio, stress-test it against different scenarios, and make sure you’re positioned for whatever comes next.