--- title: "Close NH-01 Primary Drives Turnout Expectations Sharply Higher" date: 2026-09-09T12:39:04.032062+00:00 category: Elections event_ticker: KXPRIMARYTURNOUT-NH1D26 direction: spike change_pct: 71 price_before: 28.0% price_after: 99.0% anomaly_date: 2026-09-09 last_updated: 2026-09-09T12:39:04.032Z --- # Close NH-01 Primary Drives Turnout Expectations Sharply Higher ## TL;DR Following the September 8, 2026, New Hampshire’s 1st Congressional District Democratic primary, prediction markets have repriced to reflect significantly higher implied voter turnout expectations. The probability of turnout exceeding 75,000 voters surged from 28% to 99%, a 71 percentage point increase, in the post-election session. This shift reflects strong market conviction that the highly competitive nature of the race drove higher voter participation. **Key Market Signals** - **Broad Repricing:** Probabilities rose across six of eight turnout outcomes, with market consensus shifting to near-certainty that turnout surpassed 70,000 and a 33% chance it exceeded 80,000. - **Key Threshold Repriced:** The probability of turnout exceeding 75,000 voters experienced the most significant single shift, increasing 71 pp from 28% to 99%. - **Catalyst Identified:** The market reacted to the highly competitive NH-01 primary, which was too close to call until early Wednesday morning, September 9, suggesting robust voter engagement. --- The conclusion of a [closely contested Democratic primary](https://indepthnh.org/2026/09/08/races-set-but-1st-district-democratic-primary-too-close-to-call/) in New Hampshire’s 1st Congressional District on Tuesday, September 8, 2026, prompted a significant repricing in voter turnout prediction markets. In the session on Wednesday, September 9, contracts for turnout exceeding 75,000 voters surged to 99% probability from just 28% a day earlier. The move suggests traders are overwhelmingly confident that the competitive nature of the race drove higher-than-expected voter participation, even as official final tallies remain unavailable. The repricing was not isolated to a single outcome. Probabilities rose across six of the eight available contracts, indicating a broad-based shift toward expectations of higher turnout. The market now implies a near-certainty that turnout surpassed 70,000 and assigns a 33% chance it exceeded 80,000. This post-election consensus stands in contrast to the more uncertain outlook priced in before votes were cast. ## Distribution Analysis | Outcome | Current Prob | Change | Volume | | :--- | :--- | :--- | :--- | | ≥55,000 | 99% | +2.0pp | 4,760 | | ≥60,000 | 99% | +12.0pp | 3,757 | | ≥65,000 | 99% | +22.0pp | 5,235 | | ≥70,000 | 99% | +47.0pp | 3,022 | | ≥75,000 | 99% | **+71.0pp** | 3,213 | | ≥80,000 | 33% | **+23.0pp** | 14,574 | | ≥85,000 | 1% | -3.0pp | 3,055 | | ≥90,000 | 1% | -3.0pp | 2,582 | **Net: 6 of 8 contracts rose on a combined 34,562 in volume, decisively shifting the implied consensus turnout significantly higher.** ## What's Driving the Shift The sharp repricing appears to be a direct reaction to the results and high-profile nature of the NH-01 Democratic primary. - **A Highly Competitive Race:** The contest between former Portsmouth city councilor Stefany Shaheen and former Obama administration official Maura Sullivan was [too close to call late on election night](https://www.bostonglobe.com/2026/09/08/metro/nh-democratic-primary-first-congressional-district-results/), with The Associated Press not calling the race for Shaheen until [early Wednesday morning](https://www.newsfromthestates.com/article/shaheen-defeats-sullivan-win-democratic-nomination-1st-congressional-district). Such tight contests are widely understood to be key drivers of voter interest and participation. The market's significant upward revision reflects a belief that this dynamic materialized on Tuesday. - **Post-Election Information Flow:** While official, certified turnout numbers from the [New Hampshire Secretary of State](https://www.sos.nh.gov/2026-state-primary-election-results) are not yet public, the flow of precinct-level reporting throughout Tuesday night and Wednesday morning provided traders with enough data to extrapolate a high final tally. The dramatic price action on September 9 shows the market aggregating this unofficial information into a confident consensus. - **High-Stakes Contest:** The primary was to fill the seat of four-term Democratic Rep. Chris Pappas, who is [running for U.S. Senate](https://www.pbs.org/newshour/politics/live-results-new-hampshire-midterm-primaries). The open seat in a competitive district attracted a crowded field and significant media attention, likely increasing voter engagement beyond that of a typical primary. Before the election, New Hampshire's Secretary of State had predicted a "[strong, normal turnout](https://www.nhpr.org/live-updates/newhampshire-primary-election-nh-midterm-election)" statewide, and the market move suggests the competitive 1st District may have exceeded that baseline. ## Market Context This prediction market, which trades on the Kalshi exchange, is designed to resolve based on official voter turnout figures for the Democratic primary in New Hampshire's 1st Congressional District. The shift from 28% to 99% for the "≥75,000" contract represents a powerful convergence of opinion. Prior to the election, the market reflected considerable uncertainty about whether turnout would reach the 75,000 threshold. The post-election repricing indicates that as partial results became known, traders saw a high-turnout scenario as not just possible but nearly inevitable. The heaviest trading volume occurred in the "≥80,000" contract, suggesting the key debate among traders is no longer *if* turnout was high, but *how* high it was. ## What to Watch The final settlement of these contracts will depend on the official results released by the New Hampshire Secretary of State's office. This data will confirm the total number of ballots cast in the NH-01 Democratic primary and determine the final value of the contracts. The market is scheduled to close on September 8, 2027, allowing ample time for certified results to be published. ## Related Analysis - [Read the complete market report for NH-01 Democratic primary: voter turnout](/markets/elections/primaries/nh-01-democratic-primary-voter-turnout/) ### Relevant Answer Library - [Are prediction markets accurate compared to polls or expert forecasts?](/answers/are-prediction-markets-accurate-compared-to-polls-or-expert-forecasts) - [Best prediction market platforms for investors in 2026](/answers/best-prediction-market-platforms-for-investors) - [Best prediction market tools in 2026](/answers/best-prediction-market-tools-in-2026) - [Browse all Answer Library topics](/answers/)