Q3 2026 GDP Above 2.5%? Odds Fall to 84% Despite GDPNow at 3.5%

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Will Q3 2026 GDP Growth Top 2.5%? Market Slips to 84% While GDPNow Holds at 3.5%

Forecasters and nowcasts point to US third-quarter 2026 growth above 2.5%, but Kalshi's "US GDP growth in Q3 2026?" market priced the Above 2.5% outcome at 84% on Oct 21. The Atlanta Fed's GDPNow stood at 3.5% on Oct 20, down from 3.6%, according to Newsquawk. Goldman Sachs held its tracking estimate at 3.3%, per Investing.com. The New York Fed Staff Nowcast read 2.7% in its latest release, on Oct 16. The Bureau of Economic Analysis publishes its advance estimate on Oct 29.

Over three days the Above 2.5% outcome fell from 92% to 84%. It touched a period low of 80% before recovering about 4 points.

Live market odds

3 venues

US GDP growth in Q3 2026?

Each outcome's chance, from what traders are paying right now on Kalshi, Polymarket US and Polymarket.

Above 2.5%In this story

79%

KalshiBest price1.27x79¢Polymarket US1.27x79¢

1.0–1.5%

3%

Polymarket20.00x5¢

Above 0.5%

99%

Polymarket US1.01x99¢

Above 1.0%

99%

KalshiBest price1.01x99¢Polymarket US1.01x99¢

0.5–1.0%: under 1% eachShow all

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GDPNow Trimmed to 3.5% on Housing Starts, but Nowcasts Remain Above 2.5%

The data change behind the move was small. GDPNow's Oct 20 revision took one-tenth of a point off its estimate after housing starts fell, as Finks reported. Newsquawk called tenth-of-a-point revisions "routine maintenance rather than signal." Goldman saw the same housing figures and left its 3.3% call unchanged.

Each tracker still clears the 2.5% threshold, though by different margins:

• GDPNow (3.5%): about 1.0 point above
• Goldman Sachs (3.3%): about 0.8 point above
• NY Fed Nowcast (2.7%): about 0.2 point above

The NY Fed figure leaves the thinnest cushion. Its Oct 16 reading of 2.67% (reported as 2.7%) was up 0.1 point from 2.65% on Oct 9, per the New York Fed. Our sources do not explain why the market's implied probability fell roughly 8 percentage points while the trackers moved by a tenth or less.

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Net Exports and the Oct 29 BEA Advance Estimate Are the Next Test

The BEA advance estimate, due Oct 29 at 8:30 a.m. EDT, will settle the question. A print above 2.5% would match all three trackers and support the higher prices seen earlier in the week. A miss would suggest the market's discount reflected a risk the nowcasts underweighted.

Net exports pose the main risk. GDPNow already carries a drag of about 2.7 points from trade. Atlas Analytics forecast only 1.5% growth on Oct 11, citing a sharply widening trade deficit. Survey views from August were split near the line, with both the Philadelphia Fed SPF and Bloomberg's economist poll at a 2.5% median.

Before release day, watch whether the remaining GDPNow and NY Fed updates hold their cushions above 2.5%. Price changes across every growth bracket are on the US Q3 2026 GDP growth market page.