A running estimate of real GDP growth using incoming monthly releases and transparent component contributions.
The GDP Dynamics nowcast for the third quarter of 2026 edged up to 2.66% annualized growth, from 2.65% in the September 18 update. That works out to roughly 0.66% quarter-over-quarter growth.
This was about as small an update as they come. The model moved just 0.01 percentage point, with the improvement coming from net exports while residential investment was effectively unchanged.
Net exports accounted for the measurable improvement in today's update, adding 0.01 percentage point to the GDP growth estimate.
That doesn't mean trade has suddenly become a source of strength. Net exports are still subtracting about 1.29 percentage points from the current Q3 growth estimate. The latest update simply made that drag slightly smaller.
The financial backdrop around the trade sector has also been moving quickly. The Federal Reserve raised its target range by 25 basis points to 3.75%–4.00% on September 16, citing still-elevated inflation. The move was followed by a sharp increase in the dollar before some of that gain was reversed the following day.
Treasury markets have been similarly volatile. The 10-year Treasury yield reached 5.01% on September 16 before falling back to 4.94% on September 17.
Because exchange rates feed into the relative prices of imports and exports with a lag, I wouldn't read too much into a single day's movement in the dollar. But these financial variables matter for the model's evolving estimate of the external sector, and today's update produced a marginally smaller net-export drag.
Residential investment technically contributed another positive movement in the model, but the change rounds to 0.00 percentage point. In other words, there isn't much of a housing story in today's headline number.
The underlying housing data are mixed as well.
August housing starts fell 2.6% to a seasonally adjusted annual rate of 1.275 million units. Building permits declined 2.7% from July to 1.394 million.
There was, however, an important difference underneath the headline numbers. Single-family housing starts increased 7.6%, rising to an annualized 918,000 units, even as single-family permits fell 1.8%.
That combination is consistent with the model showing essentially no change in residential investment rather than a meaningful upward or downward revision. Some parts of residential construction improved, while the broader indicators remained soft.
Consumer spending currently contributes 3.31 percentage points to the Q3 growth estimate. That remains a large contribution level, but it should not be confused with the source of today's revision. Consumption did not drive the September 21 increase.
Business fixed investment currently contributes 0.31 percentage point, while inventories add another 0.28 percentage point. Residential investment contributes 0.04 percentage point, and government spending adds approximately 0.01 percentage point.
The major offset remains net exports at −1.29 percentage points.
Put together, those components leave the GDP Dynamics estimate at 2.66% annualized real GDP growth for Q3 2026.
The important point in today's update is probably how little changed.
There were no negative contribution revisions in this snapshot. Net exports provided a small positive adjustment, residential investment was effectively unchanged, and the overall nowcast moved just one-hundredth of a percentage point.
That leaves the broader Q3 picture essentially intact.
The model continues to show solid real GDP growth, with consumer spending providing a large positive contribution and business fixed investment and inventories adding to growth. Much of that strength continues to be offset by the negative contribution from net exports.
The GDP Dynamics Q3 2026 nowcast now stands at 2.66% annualized, up only 0.01 percentage point from the previous estimate.
This wasn't a meaningful change in the outlook. It was a small adjustment driven primarily by a slightly better estimate for net exports, while residential investment barely moved.
With Treasury yields hovering around 5%, the Federal Reserve having just raised its policy rate, and the dollar reacting to that change in the interest-rate environment, the financial conditions feeding into the Q3 estimate are moving considerably more than today's GDP revision suggests.
For now, the model continues to point to Q3 real GDP growth in the mid-2% range, with the composition of that growth remaining more interesting than today's tiny change in the headline number.