Melbourne, May 13, 2026, 07:35 AEST
- National Australia Bank ended Tuesday down 2.09% at A$37.42. ANZ, CBA and Westpac shares dropped as well, as the move reflected a broad bank-sector repricing rather than anything unique to NAB.
- Big shifts to negative gearing and capital gains tax landed in the federal budget, dragging housing demand, collateral values, and mortgage growth back into focus for investors weighing share prices.
- Bulls stick with NAB for the business bank, deposit strength, and a reliable dividend. Bears, though, flag loan-loss risks, questions around capital buffers, and the threat of rates remaining elevated.
NAB shares tumbled again, but this time it wasn’t a single negative headline to blame. Instead, investors wrestled with a larger concern: shifting housing tax rules, already elevated rates, and mounting credit stress. All three are now forcing a rethink for Australia’s mortgage-focused banks.
Treasurer Jim Chalmers’ budget draws a sharp line: from next year, negative gearing on residential property will apply only to new builds. The longstanding 50% capital gains tax discount gets the axe, replaced with indexation tied to inflation. Negative gearing lets investors offset property losses against other income; capital gains tax kicks in on profits from asset sales. Both levers have underpinned housing investor appetite for years.
For NAB, the link is clear: Australian banks are heavily exposed to housing. IG market analyst Tony Sycamore puts it like this—residential mortgages account for roughly 45% to 50% of assets at the Big Four. Any policy tweaks that hit property prices could quickly translate to “mortgage stress and bad debts.” That’s how budget decisions translate right onto bank share charts. AAP News
The banks tracked each other lower: NAB dropped 2.09% to A$37.42, ANZ shed 2.12%, CBA ended down 1.40%, and Westpac slipped 1.37%. BHP, by contrast, climbed 2.49%. Funds weren’t leaving Australia—just shifting out of banks and into miners as concerns over housing and credit risk picked up again.
NAB had less room to maneuver heading into this week, coming off a first-half result that landed somewhere in the middle. The lender posted A$2.64 billion in cash earnings for the six months through March 31, trailing the A$2.93 billion that analysts polled by Visible Alpha had penciled in. That stretch included a hefty A$949 million post-tax charge tied to software capitalisation, plus A$706 million in credit impairment charges—costs linked to loans the bank doesn’t expect to recover in full.
No lightness from management this time. CEO Andrew Irvine spoke to media, pointing to the Middle East conflict as driving “a far more volatile environment.” Reuters also quoted him: forecasting, he said, is “very hard…in these times.” For investors, that restraint is significant. NAB isn’t being measured mainly by headline profit right now, but by its buffer if borrowers start to slip.
The macro numbers didn’t offer any relief. NAB’s April business survey put confidence at -24—still stuck deep in the red—with business conditions slipping to +3, barely above water and the second-lowest level since 2020. Michael Hayes, an economist at NAB, flagged “rising prices and pressure on margins,” and noted purchase costs are outpacing what businesses can charge. For Australia’s top business lender, this isn’t just an abstract data point; it’s what their own clients are saying. Reuters
Rates complicate things. The RBA cash rate sits at 4.35% after that May hike, with the next policy call set for June 16. According to Kalshi’s June RBA market, there’s a 65% probability the rate holds steady, while a 1-to-25 basis point move up is given 22%. Over on Polymarket, no change is priced at 79%, a hike at 22%, with the odds of a cut under 1%. Higher rates boost net interest margin—the difference between income from loans and funding costs—but borrowers feel the pinch.
The bull camp hasn’t lost its argument. Stripping out big one-offs, NAB posted A$3.59 billion in cash earnings—2.3% higher than the previous half. The interim dividend held steady at 85 cents a share. Lending in Business and Private Banking climbed 10.0% on the year, with customer deposits in that segment up 7.4%. For some investors, this makes the selloff look more like a knee-jerk reaction to policy worries, not a signal the core franchise is faltering.
The bearish response is immediate. NAB posted a common equity tier 1 ratio of 11.65%. Management is after roughly A$1.8 billion via a discounted dividend reinvestment plan—an effort to shore up capital, not a signal of trouble. Instead, it’s a conservative move as housing demand and business credit quality face fresh scrutiny from investors.
Right now, NAB’s stock is likely to take its cues from concrete results rather than speculation. Investors are watching for CBA’s third-quarter update, set for release today—any hint of margin squeeze, rising arrears, or a slowdown in mortgage growth could rattle NAB, ANZ, and Westpac as well. The budget’s out, but the market hasn’t yet settled whether it’s just a hit to sentiment or a sign that the banks’ key loan book is in for a tougher stretch.
Right now, investors are treating NAB as more than just a dividend play—they see it as a geared proxy for Australia’s housing market, small-business risks, and whatever the RBA does next. That’s the story behind the 2% drop: the decline packs a punch beyond what the headline figure shows.
