A US political shift may be the catalyst Aussie borrowers have been waiting for, but they shouldn’t get their near-term hopes up
The US midterm elections delivered a decisive Democratic sweep of Congress on 5 November 2026, and while Australians didn't vote, they may yet feel the consequences on local economic conditions.
For Shane Oliver, chief economist at AMP, the connection runs through oil prices, bond markets, and the Reserve Bank of Australia's (RBA) next moves. The chain is longer than most borrowers realise but the destination is clear: what happens in Washington does not stay in Washington.
The main factor: oil prices
Oliver pointed to oil as the key channel. If a Democratic-controlled Congress acts as a brake on Trump, then oil prices could ease. That would take pressure off Australian inflation and eventually give the RBA room to cut rates.
"An optimistic interpretation would be that Trump will be reined in… that could mean we've seen the peak in oil prices," Oliver said. "If oil prices have now come down, that will start to take pressure off headline inflation in Australia, and eventually there'll be some flow-through to underlying inflation."
However, optimism is conditional. Oliver was quick to flag that Trump remains unpredictable, and an emboldened or aggrieved White House could just as easily escalate tensions with Iran or ramp up tariff conflicts, sending oil prices higher again.
Why the bond market matters to mortgages
To understand how a US election flows through to an Australian borrower's repayments, it helps to understand one key concept: the bond market.
Governments borrow money by issuing bonds, essentially IOUs, to investors. The return investors earn on those bonds is called the yield. When investors grow nervous about inflation or instability, they demand higher yields. And when US bond yields rise, the effect ripples outward to countries like Australia.
That happens because Australian banks don't just fund their mortgage books from customer deposits. They also borrow from global wholesale markets and those markets are priced relative to US Treasury bonds as a global benchmark. US Treasury yields are an important global benchmark and can flow through to Australian financial markets and borrowing costs.
In short: when US bond yields climb, the cost of funding rises for Australian banks, and some of that cost eventually lands on borrowers, particularly those on fixed rates (which is, admittedly, a small fraction of the borrowing population).
Oliver explained how the bond rally that followed the election result should be read carefully. The 10-year yield, he said, reflects two things: where markets expect interest rates to be over the next decade, plus a "term premium". The post-election rally most likely compressed that premium rather than signalling any change in near-term rate expectations.
"It could prove to be a knee-jerk blip," Oliver said. "The money market in the US still has an 80% probability that the Fed's going to hike in December, and is still factoring in just over two hikes over the course of the next year."
Oliver also flagged two specific near-term risks that could push US yields – and therefore global borrowing costs – back up. The US government's funding resolution expires on 11 December 2026, and a debt ceiling fight is expected to become pressing around mid-2027. With Democrats controlling Congress, resolving either could prove contentious.
When will rates come down? It's still too early to say
For Australian mortgage holders, the most direct question is simpler: when will rates come down? The honest answer, right now, is that it depends on a set of variables that remain genuinely unresolved.
Oliver's base case is that the November 2026 RBA rate rise was the peak of this cycle. He puts the chance of one more hike at around 30%. But his central forecast is a pause at the December 2026 meeting, followed by rates staying on hold for roughly 12 months.
That means relief, but not soon. Borrowers who were hoping for cuts in the first half of 2027 may need to adjust their expectations.
It is worth understanding how quickly that outlook has shifted. As recently as August 2025, the prevailing forecast among economists was for three more rate cuts. Then inflation came in higher than expected, the RBA pivoted to hikes from February 2026, and the first cut has now been pushed out to the end of 2027. The stickiness of domestic inflation remains the dominant force shaping the RBA's path.
But the ambiguity stretching out from the US midterm result adds a further layer. The instinct, when one party loses control of Congress, is to assume that less gets done and therefore less can go wrong. CommBank senior geo-economics analyst Madison Cartwright is pushing back firmly on that reading.
"Divided government reduces domestic fiscal risk while increasing policy risk," Cartwright said. "Markets and businesses should not equate congressional gridlock with policy calm. Policy is likely to become less predictable rather than more moderate."
With Democrats controlling the legislative agenda, the Trump administration's ability to push through major new spending or tax changes is significantly constrained. That reduces one type of risk.
But CommBank's analysis suggests the administration may respond by concentrating on areas where the president has greater room to act without Congress – foreign policy, tariffs, sanctions and export controls. These are precisely the levers that move global commodity prices, disrupt supply chains, and send bond markets lurching.
For Australia, the indirect exposure is harder to insulate against than the direct one. The election has not changed the RBA's fundamental settings, but it has added new and unpredictable variables to a global environment that was already difficult to read.
What this means for brokers and clients
For mortgage brokers, the practical message is straightforward: prepare clients for a prolonged hold, not an early reprieve.
Fixed rates will remain sensitive to global bond market moves, including any further turbulence from Washington. Variable rates, which track the RBA cash rate directly, will stay elevated until the central bank is confident inflation is under control.
For now, Australian borrowers sit in a holding pattern shaped by forces both domestic and global. The US election has not changed the RBA's fundamental calculus, but it has added new layers of uncertainty to a global environment that was already difficult to read.
As Oliver put it, the ambiguity cuts both ways, and that is precisely what brokers should be communicating to clients as they navigate the months ahead.
