At 2:30pm AEDT, the S&P/ASX 200 Index (ASX: XJO) was down 0.5% at 8,651 points in the lead up to the Reserve Bank of Australia's (RBA) latest interest rate decision.
As you're likely aware, on 3 February, at its first meeting of 2026, the RBA increased the official cash rate by 0.25% to 3.85%.
On 17 March, with surging energy prices from the then nascent Iran war already stoking inflation higher yet, Australia's central bank hiked rates by another 0.25%.
That brought the official rate to 4.10%, which was where it stood this afternoon. Right up until the RBA announced another 0.25% increase in the case rate, bringing the official interest rate to 4.35%.
In the minutes that followed the announcement, the ASX 200 tumbled another 0.2% to 8,635 points.
Investor reaction was likely somewhat muted with market expectations of a rate rise today having hit 75%.
Here's what we know.
Image source: Getty Images
ASX 200 slips on third RBA interest rate hike of 2026
The RBA noted that inflation in Australia had already "picked up materially in the second half of 2025" partially driven by greater capacity pressures.
But ASX 200 investors also have the ongoing Iran war to thank for resurgent inflation and today's interest rate hike.
According to the RBA:
In addition, the conflict in the Middle East has resulted in sharply higher fuel and related commodity prices, which are already adding to inflation. There are early signs that many firms experiencing cost pressures are looking to increase prices of their goods and services. Short-term measures of inflation expectations have also risen.
Investors will also need to deal with the "materially heightened uncertainties" regarding the outlook for Australia's economy and inflation.
"With the conflict in the Middle East continuing, there are plausible scenarios where inflation is higher and activity lower than envisaged under the baseline forecast.," the RBA cautioned.
The central bank's baseline forecast assumes that the Iran war is resolved soon and fuel prices then decline.
The RBA added that it remains focused on its mandate to deliver price stability and full employment.
Eight RBA board members voted to increase interest rates by 0.25%, while one member voted to leave the cash rate target unchanged.
Now what?
With Australia's official interest rate now back at its 2024 peak, which was then the highest level since 2011, what can ASX 200 investors expect next?
According to eToro lead analyst for APAC Josh Gilbert:
The road ahead beyond May is also important because markets still see another hike in 2026. With the inflation impact from energy not done, especially with the Strait of Hormuz remaining effectively closed and the conflict showing little signs of ending, the upside risks for the rest of the year remain firmly on the table…
The takeaway for portfolios is that boring can be brilliant in this environment. Focus on quality balance sheets and pricing power, because companies that can pass costs through without losing volume are the ones that can hold up best with the current macro backdrop.
