Atlanta Fed GDPNow estimate dips to 3.6% from 3.7%

• The earlier figure had been 3.7%.

Today's downward revision follows the lower wholesale inventories figures released this morning. The next GDPNow update will arrive in a week, drawing nearer to the initial Q3 GDP data.

The report said:

"The GDPNow model estimate for real GDP growth (seasonally adjusted annual rate) in the third quarter of 2026 is 3.6 percent on October 8, down from 3.7 percent on October 6. After this morning’s wholesale trade report from the US Census Bureau, the nowcast of the contribution of inventory investment to third-quarter real GDP growth decreased from 2.07 percentage points to 1.98 percentage points."

That figure indicates inventories are driving a significant share of third-quarter growth.

As background, the Atlanta Fed's GDPNow model offers a real-time estimate of US GDP before the official quarterly figures. The headline value tracks seasonally adjusted annualized real GDP growth from the prior quarter, not year-over-year changes.

The GDPNow model aggregates projections for 13 components of GDP, employing a methodology similar to the Bureau of Economic Analysis. It adjusts as fresh data on consumer spending, construction, manufacturing, trade and inventories come in. The estimate evolves with each new release to reflect the implied quarterly output.

Importantly, GDPNow is not an official Atlanta Fed or Federal Reserve forecast. It operates purely mechanically, without judgmental tweaks, so a revision carries no implication for policy or rate decisions.

Initial estimates often see large swings as much of the quarter's data is still missing. Trade and inventory fluctuations can cause big moves in the headline growth figure even if domestic demand hardly changes.

Traders typically focus on the driver behind the revision. A rise in consumer spending means something different from a buildup of inventories or a narrower trade gap. GDPNow turns individual data prints into a composite growth snapshot, but stays an estimate, not a final assessment of economic momentum.