Third-quarter GDP beat forecasts as AI investment and consumer spending fuel the fastest expansion since 2025
America’s economy ran hotter than expected through the summer months, delivering a third-quarter expansion that outpaced Wall Street’s forecasts and underscored the durability of consumer and business spending — even as the mortgage market braces for what could be two more Federal Reserve rate hikes before the end of next year.
The advance estimate, released by the Bureau of Economic Analysis (BEA) on October 29, arrived just days before the November 3 midterm elections, where economic conditions and cost-of-living pressures have defined the campaign.
The US economy expanded at a 3.4% annualized rate in the third quarter of 2026, outpacing the 3.1% to 3.2% consensus forecast, and marking the fastest pace of growth since Q3 2025.
The figure sharply outpaced Q2 2026’s 2.2% rate, driven by an AI-fueled surge in business investment and resilient consumer spending.
For mortgage professionals, however, the details embedded in the report carry as much weight as the headline: residential investment fell during the quarter, inflation re-accelerated in September, and the Federal Reserve appears on course for further rate hikes.
The GDP release, the final major economic data point before the upcoming November 3 midterms, landed in a market already on edge about the policy direction.
The personal saving rate slipped to 3.8% in September, down from 4.1% in August, underscoring the financial strain persisting beneath the headline expansion.
The AI investment engine
Business investment climbed 12.7% during the quarter as companies accelerated deployment of capital into data centers and artificial intelligence infrastructure.
Investment in new equipment surged 20.8% on an annualized basis.
Consumer spending grew 3.8%, matching Q2 and the strongest quarterly reading since late 2024.
The gains were uneven. Residential investment declined, extending a sustained drag on the housing sector.
Exports also subtracted from growth, and a sharp rise in imports further weighed on the total.
What this means for mortgage rates
Alongside the GDP data, the BEA published the September Personal Consumption Expenditures (PCE) Price Index – the inflation gauge the Federal Reserve tracks most closely.
PCE inflation rose 3.6% year-over-year in September, up from 3.4% in August, while core PCE held at 3.1%, nearly 110 basis points above the Fed’s 2% target.
Federal Reserve Chair Kevin Warsh, speaking ahead of the release, described the economy as expanding at a “strong pace,” telling reporters that “domestic spending has been resilient, productivity growth is strong, and capital investment robust.”
Mike Fratantoni, chief economist at the Mortgage Bankers Association (MBA) in Washington, DC, provided the most direct read for the broker channel.
“Residential investment and net exports continued to weigh on economic growth, with the initial estimate showing the impacts of a decline in the pace of construction and a large jump in imported goods,” Frantantoni said.
On inflation, Fratantoni said: “Perhaps of note for the mortgage market, the September reading for PCE inflation showed an increase to 3.6 percent from the prior reading of 3.4 percent. While this increase was certainly impacted by the recent spike in oil prices, core PCE inflation remained at 3.1 percent, still well above the Fed’s target of 2 percent.”
He added: “Persistently elevated inflation is likely to keep the Fed on track to hike rates at future meetings. MBA is holding to our current forecast of an additional two hikes over the next six months.”
If the MBA projection holds, the federal funds rate would reach 4% to 4.25% – a scenario brokers should be factoring into rate lock strategy and client conversations ahead of December as the next FOMC decision draws near.
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