Yesterday was a good day for Australian investors.
The April CPI print showed headline inflation slowing to 4.2% annually, below the 4.4% consensus forecast.
The ASX 200 rose 0.69%, helped by rate-sensitive ASX financial stocks.
But before investors get too comfortable, there is a more complicated story buried in the data.
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The number that actually matters moved the wrong way
The RBA does not set monetary policy based purely on headline CPI.
It focuses on trimmed mean inflation, which strips out the most volatile price movements to reveal underlying price momentum.
Yesterday's data showed trimmed mean inflation rising to 3.4% annually, its highest reading since late 2024.
The RBA's target band is 2% to 3%.
Trimmed mean inflation is not just above that band, but actually rising.
The headline undershoot was driven almost entirely by the government's temporary fuel excise reduction, which pushed automotive fuel prices lower.
That relief unwinds in July, at which point headline CPI will face direct upward pressure.
According to Westpac's economics team, trimmed mean inflation is forecast to remain above 3% until end-2027, with the cash rate on hold until 2028 when the RBA is expected to begin cutting.
So why did the market rally?
Markets were bracing for something worse.
March CPI came in at 4.6%, and with oil prices having surged above US$105 per barrel in April, many economists feared a worse outcome.
The April print was a relief relative to those fears, even if it was not good news in absolute terms.
The probability of a June rate hike has now receded to near zero, and that removal of near-term tightening risk was enough to send rate-sensitive stocks sharply higher.
What it means for Commonwealth Bank
For Commonwealth Bank of Australia (ASX: CBA), the inflation picture cuts both ways.
Higher rates for longer support net interest margins, which is good for earnings.
But elevated rates also increase the risk of mortgage stress across CBA's enormous home loan book.
CBA declared a fully franked interim dividend of $2.35 per share for the first half of FY2026, up 4.4% year-on-year, backed by a 5% lift in statutory net profit to $5.41 billion.
That result was delivered in a high-rate environment, underscoring CBA's ability to generate strong earnings even when conditions are tight.
The stock trades at approximately 27 times forward earnings, a premium that reflects its quality but leaves little room for disappointment if credit conditions deteriorate.
What it means for Mirvac
For Mirvac Group (ASX: MGR), the implications are more direct.
Property trusts are acutely sensitive to interest rates because higher rates increase borrowing costs and compress asset valuations simultaneously.
The removal of a June hike from market pricing was the primary driver of yesterday's rally in rate-sensitive ASX financial stocks, and Mirvac was a clear beneficiary.
However, with trimmed mean inflation moving higher and the fuel excise unwind arriving in July, the path to rate cuts remains distant.
If Westpac's forecast of a late 2027 return to target proves correct, Mirvac and its REIT peers face another eighteen months of elevated rates before meaningful relief arrives.
The good news is that Mirvac is not simply waiting for rates to fall.
Residential sales lifted 38% year on year in the first half of FY2026, and the federal budget's new-build negative gearing exemption adds a further demand tailwind for its development pipeline.
Foolish takeaway
Yesterday's inflation news was better than feared, without being great.
The headline number was flattered by a temporary fuel excise cut that disappears in July, and the trimmed mean measure the RBA actually watches moved higher.
For investors in ASX financial stocks like CBA and Mirvac, the removal of a near-term rate hike is welcome news.
But the path to rate cuts remains long, and the inflation fight is far from won.
