TOTAL VOLUME:
$134.1b
24H VOL:
$113,466,932
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,423,222,590
402,751
Markets across
30,217
events
MATCHED EVENTS:
2,632
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jul 7, 1:12 PM EST
Kalshi
A runoff election will occur in Alabama for a Republican Senate seat in 2026, where the final margin of victory for either candidate will determine the outcome across multiple percentage-point ranges.
The margin of victory is calculated as the vote percentage received by the leading candidate minus the vote percentage of the candidate finishing immediately behind if that candidate wins, or the vote percentage of the first-place finisher if the leading candidate loses. Each margin range is inclusive of its lower bound and exclusive of its upper bound; for example, a margin of exactly 6% falls in the 6-9% range, not the 3-6% range. No rounding is applied to the calculated margin. If a candidate runs under multiple parties or is listed multiple times, votes are summed for the same underlying candidate. A winning margin is positive, a losing margin is negative, and a tie results in a margin of zero. For uncontested races where a candidate is the only nominee, the margin is 100 percentage points.
Prediction market odds on Kalshi often diverge from traditional polling averages because markets incorporate real-money incentives and forward-looking expectations. While polls capture voter sentiment at a single moment, prediction markets aggregate information from traders who profit by accurately forecasting outcomes. For the Alabama Republican Senate runoff margin, market prices may lead or lag polling depending on whether traders believe polls underestimate or overestimate candidate support. Comparing Kalshi implied probabilities to recent polls and analyst forecasts reveals whether the market is pricing in factors polls may have missed or whether consensus exists between the two approaches.
On Kalshi, the Alabama Republican Senate runoff margin of victory is priced through binary or range-based contracts that reflect the expected margin between the leading Republican candidate and their runoff opponent. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. Traders buy and sell shares at prices between 0 and 100 cents, with the price representing the implied probability of that outcome occurring. Kalshi's order book aggregates supply and demand, and the current mid-market price reflects the consensus forecast among active traders. As election day approaches and new information surfaces, prices adjust dynamically to reflect updated expectations about the final margin.
The Alabama Republican Senate runoff margin of victory market resolves on Jun 16, 2027. Resolution is determined by the official certified results of the runoff election, which establish the final vote margin between the two leading Republican candidates. Once election authorities announce and certify the outcome, the market settles based on whether the actual margin matches the contract specifications. Traders holding positions in the winning outcome receive their payout, while those on the losing side forfeit their stake. The resolution process typically occurs within days of the election once all votes are counted and verified.
Key catalysts that could shift the Alabama Republican Senate runoff margin market include candidate debate performances, major endorsements from national Republican figures, campaign spending announcements, and breaking news about either candidate. Voter turnout models and early voting data released closer to election day will influence trader expectations about the final margin. Polling releases, particularly from high-quality firms, often trigger repricing on Kalshi. Additionally, demographic shifts in voter registration, campaign gaffes, or external events affecting Republican primary voters could move odds. Traders continuously update positions based on these signals, causing the market price to fluctuate as new information becomes available.