US economy grew 3.4% in the third quarter, but September inflation ran 3.6% and real income fell 0.3%

The Bureau of Economic Analysis released two reports at 8:30 a.m. on Thursday, Oct. 29, and they tell different stories about the same economy. In the advance GDP estimate, real output grew at a 3.4% annual rate in the third quarter, up from 2.2% in the second. In the personal income and outlays report, the PCE price index, the Federal Reserve's preferred inflation gauge, rose 0.5% in September and 3.6% from a year earlier.

Both reports are the BEA's own numbers. The gap between them is the story.

The growth report

• Real GDP: +3.4% annualized in Q3 (Q2: +2.2%). Current-dollar GDP: +5.6%.
• Real final sales to private domestic purchasers, consumer spending plus business investment: +4.9% (Q2: +4.6%).
• Q3 PCE price index: +2.1% annualized (Q2: +5.0%). Excluding food and energy: +2.5% (Q2: +3.3%).

The BEA said the acceleration came from investment and an upturn in government spending, partly offset by lower exports. Within investment, the increase was led by private inventories and equipment, "mainly computers and peripheral equipment," which fits the AI-hardware buildout. Consumer spending rose in both services (health care and restaurants and hotels) and goods. Imports, which subtract from GDP, also rose, led by capital goods.

One quirk the BEA flags: government spending rose because the Strategic Petroleum Reserve sold less oil in Q3 than in Q2. The agency notes there is "no direct effect on GDP" from those sales, so the government line is partly an accounting swing.

The inflation report

Households spent $113.1 billion more in September, but almost all of it was price: real spending rose only $2.6 billion. Income did not keep up, and the personal saving rate was 3.8%, with saving of $911.1 billion. Our earlier look at spending from savings explains why a low saving rate matters for the restaurants, used-car lots and gyms that live on discretionary spending.

The number behind the number

The 2.1% quarterly PCE price figure and the 3.6% year-over-year figure are not in conflict. The quarterly number is an annualized rate for July through September, and it follows a 5.0% pace in the second quarter. The year-over-year number still contains those earlier large increases. But September itself, at 0.5% in one month (about 6% annualized if repeated, our arithmetic), was faster than August's 0.3%, so the quarter's calm average hides a hotter finish.

How markets reacted

Treasury data show the 10-year par yield at 4.98% on Oct. 29, down from 5.05% on Oct. 28, and the 2-year at 4.61% from 4.67%. The S&P 500 closed at 7,720.39 on Oct. 29, down 0.3%, a session dominated by Alphabet's 12.6% drop rather than by the macro data. We cannot tell from prices alone how much of the bond move came from the BEA releases.

What it means for the Fed

The day before, the Fed held its target range at 3.75% to 4% with two dissents in favor of a hike, as we reported in our decision story. Growth of 3.4% and core PCE at 3.1%, above the Fed's 2% goal, are the numbers hawks will point to. The counter-case is that real income is falling, which cools demand by itself.

What it means for business owners

• Restaurants and retailers: customers are spending more dollars and buying about the same amount, so unit volume is flat even when sales look up.
• Contractors and equipment buyers: investment in equipment is the strongest part of the report, but borrowing costs are still high: see our floating-rate line piece.
• Anyone setting prices: core inflation of 3.1% means supplier increases are still passing through.

What to watch

• Nov. 6: October jobs report (forecast 65,000 jobs, unemployment 4.2%, per our calendar).
• Nov. 25: BEA's second GDP estimate and the October PCE report.
• Whether real incomes turn up or the saving rate slides further below 3.8%.

Sources: BEA GDP advance estimate, Q3 2026; BEA Personal Income and Outlays, September 2026; U.S. Treasury; Yahoo Finance. This is economic information, not investment advice.