Reported results from the November 3, 2026, midterm elections have effectively settled a prediction market contract asking whether the U.S. Senate race in Montana or New Jersey would be closer. In the session on Thursday, November 5, 2026, the contract for "Montana US Senate" surged to 95 cents from 4 cents as traders priced in official results showing a far narrower victory margin in the Treasure State.
The repricing follows confirmation that Republican Kurt Alme’s victory margin in Montana was approximately 10.6 percentage points, while incumbent Senator Cory Booker secured re-election in New Jersey with a margin of roughly 27 points. The dramatic 91-point shift in the "Montana" contract reflects the market's rapid alignment with this definitive electoral data, reversing a pre-election consensus that had priced the New Jersey contest as the more likely to be competitive.
Distribution Analysis
| Outcome | Current Prob | Change | Volume |
|---|---|---|---|
| Montana US Senate | 95% | +91.0pp | 15 |
| New Jersey US Senate | 9% | -81.0pp | 1 |
Probabilities may not sum to 100% due to market dynamics. Data as of November 5, 2026.
Net: The market saw a near-total probability shift toward Montana based on conclusive election results, with the contract gaining 91 points to become the overwhelming favorite.
What's Driving the Shift
The market's decisive move is a direct reaction to the certified outcomes of the two respective Senate elections.
A Competitive Four-Way Race in Montana: The Montana contest proved significantly closer than New Jersey's. Republican Kurt Alme secured the seat with 48.3% of the vote, but a strong showing by independent Seth Bodnar, who garnered 37.7%, kept the margin tight. The presence of Democrat Alani Bankhead (12.1%) further split the vote, contributing to a competitive dynamic that polling had suggested was possible. Several late-stage polls showed a single-digit race, though a final polling average gave Alme a 6.3-point lead.
A Decisive Incumbent Victory in New Jersey: In contrast, the New Jersey race was not considered competitive by most analysts. Incumbent Democrat Cory Booker won with 62.24% of the vote against Republican Justin Murphy’s 35.18%, a margin of approximately 27 points. Throughout the cycle, election forecasters like The Cook Political Report and Sabato's Crystal Ball rated the race as "Solid" or "Safe" Democratic, and a lack of public polling underscored expectations of a landslide victory.
Market Context
This prediction market, which trades on the Kalshi exchange, saw a complete reversal following the election. Before results were known, contracts for New Jersey being the closer race traded as high as 90 cents, implying a strong belief that the complex, multi-candidate field in Montana would not ultimately produce a tighter margin than a supposedly safe seat in New Jersey.
The post-election snap to 95 cents for the "Montana" contract demonstrates how prediction markets react when speculation is replaced by factual data. The low trading volume accompanying the shift suggests the outcome is now viewed as a foregone conclusion, with the market converging toward its final settlement value ahead of the closing date.
What to Watch
The market is scheduled to close on November 10, 2026. Settlement will be determined by a comparison of the final, official vote margins for the winning candidate in each race, as reported by the New Jersey Division of Elections and the Montana Secretary of State. Given the wide disparity in the reported margins, the market is expected to remain stable near current levels until settlement.
