TOTAL VOLUME:

$114.6b

24H VOL:

$136,531,341

24H TRANSACTIONS:

1,380,975,298

OPEN INTEREST:

$1,197,913,311

339,027

Markets across

34,284

events

MATCHED EVENTS:

4,693

PLATFORM COVERAGE:

5

Polymarket:

42%

VS.

Kalshi:

58%

BETA
Dashboards
Insights
Indices
Tour
Watchlist
All
Trending
Breaking
New
Ending Soon
Politics
Sports
Crypto
Companies
Elections
Financials
Economics
Other
Entertainment
Science and Technology
Government shutdown by October 1?
kalshi
polymarket

Government shutdown by October 1?

Total volume:
$296,115
Volume 24h:
$28,465
193%
Liquidity:
$16,602
0.42%
Open interest:
$152,188
16%

Government shutdown by October 1?

 - Polymarket

Government shutdown by October 1? - Polymarket

1W

News

Positive

Negative

Neutral

Hover marker for details

Vol.

·

Resolves Oct 2, 2026

Government shutdown by October 1?

12%chance
Amount

$

Trade on
polymarket

Trade on Polymarket

At 14¢ buys you 714 shares | Odds: 12% Total Payout: $714 | Net Profit: $614 Multiplier: 7.14x | ROI: 614% APY not meaningful 35 days to resolution
You will be redirected to the platform to complete this trade.
Outcome
Trade
Chance %
Price
Spread
Liquidity
Volume
24h
7d
Open Interest
Ends in
Result
polymarket

Government shutdown by October 1?

Trade
12%
Yes 14¢No 90¢
4¢
$16,602
$7,186
0%
7%
N/A
1mo 5d
active
kalshi

Yes

Trade
8%
Yes 8¢No 93¢
1¢
N/A
$288,929
11%
49%
$152,188
1mo 5d
active
Total markets: 2

Description

This event group tracks whether the United States federal government enters a shutdown due to a lapse in appropriations by October 1, 2026. A shutdown occurs when Congress fails to enact or the President fails to sign funding legislation, causing federal agencies to suspend non-excepted operations and furlough non-excepted employees. Partial shutdowns affecting one or more agencies qualify.

PredictionHero - Resolution Divergence Alerts (RDA)

Divergence Detected

Issue: The two platforms specify different resolution times on October 1, 2026. Kalshi uses 10:00 AM ET as the snapshot moment, while Polymarket uses 11:59 PM ET as the deadline. A shutdown initiated between these times would resolve differently on each platform.Hero tip: If a shutdown is announced or takes effect on October 1 between 10:00 AM and 11:59 PM ET, Kalshi will resolve NO (shutdown not yet in effect at 10 AM) while Polymarket will resolve YES (shutdown occurred by 11:59 PM). Cross-platform traders should hedge or close positions before market open on October 1 to avoid this timing arbitrage.

Critical divergence points:

  • Kalshi: Snapshot-based resolution at a fixed time. Resolves YES only if a shutdown due to lapse in appropriations is at least partially in effect at exactly 10:00 AM ET on October 1, 2026. Key Quote: 'at 10:00 AM ET on Oct 1, 2026'
  • Polymarket: Deadline-based resolution through end of day. Resolves YES if a shutdown due to lapse in appropriations occurs at any point by 11:59 PM ET on October 1, 2026. Includes detailed definitions of qualifying shutdowns (OMB directives, OPM notices) and exclusions (technical lapses, weather closures). Key Quote: 'by the specified date, 11:59 PM ET'
Our PredictionHero Resolution Divergence Alerts (RDA) are there to help users identify potential differences across platforms. They do not replace or supersede the official rules and description of any prediction market. Users are solely responsible for reviewing and understanding the applicable rules and resolution criteria before placing any trade or bet. If you notice a potential inconsistency, discrepancy, or error in an alert, please report it to our team so we can review and improve the accuracy of our data.

Polymarket

This market will resolve to "Yes" if the United States federal government enters a shutdown due to a lapse in appropriations by the specified date, 11:59 PM ET. Otherwise, this market will resolve to "No". A U.S. federal government shutdown is considered to have gone into effect when there is a lapse in appropriations that results in federal government agencies suspending non-excepted operations, typically including the furlough of non-excepted federal employees. A lapse in appropriations occurs when Congress fails to enact, or the President fails to sign into law, legislation providing funding authority for federal government operations by an applicable deadline, resulting in a funding lapse. A lapse in appropriations where no federal agencies cease or suspend non-excepted operations will not qualify as a shutdown. Partial shutdowns qualify. A shutdown affecting one or more, but not all, federal agencies constitutes a shutdown. The following will qualify as a shutdown: - An official directive from the Office of Management and Budget (OMB) ordering heads of affected agencies to execute shutdown plans (e.g., an instruction to "execute plans for an orderly shutdown") that is in effect by the specified date and time - An official operating status published by the U.S. Office of Personnel Management (OPM) indicating that, due to a lapse in appropriations, federal government operations are suspended, reduced, or vary by agency (e.g., a notice that "due to a partial lapse in appropriations, Federal Government operations vary by agency") The following will not qualify as a shutdown: - A technical lapse in appropriations where OMB or other authorized authority directs agencies to continue normal or substantially normal operations - Government closures or operating status changes resulting solely from Federal holidays, inclement weather, natural disasters, or other emergencies, unless such closures coincide with a qualifying shutdown caused by a lapse in appropriations The primary resolution source for this market will be official information from the United States government, including the U.S. Office of Personnel Management (OPM); however, a consensus of credible reporting may also be used.

Kalshi

If the United States federal government is at least partially shut down due to a lapse of appropriations at 10:00 AM ET on Oct 1, 2026, then the market resolves to Yes.

Frequently asked questions

The government shutdown odds market aggregates real-time trader sentiment across Polymarket and Kalshi, two leading prediction platforms. This market tracks whether a U.S. federal government shutdown will occur by October 1, 2026. Traders on each platform continuously update their positions, creating live probability estimates that reflect current political developments, budget negotiations, and legislative momentum. By monitoring both venues, you gain visibility into consensus forecasts and spot divergences that may signal shifting expectations among professional and retail predictors.

Prediction markets and polls measure different things. Polls capture voter sentiment or public opinion on a specific question at a moment in time, while this market reflects traders' financial commitments to an outcome. Markets incentivize accuracy through real money stakes, often incorporating private information and expert judgment faster than surveys can. For political events like a potential shutdown, markets may price in legislative dynamics, backroom negotiations, and historical patterns that traditional polls don't directly measure, making them complementary rather than interchangeable signals.

Polymarket and Kalshi operate under different regulatory frameworks, user bases, and liquidity conditions. Polymarket and Kalshi can show different implied probabilities for the same outcome because of liquidity, fee structure, participant mix, and how each venue defines the contract. Each platform's order book reflects its own traders' beliefs and risk appetite. Kalshi, as a CFTC-regulated exchange, may attract institutional participants and stricter compliance protocols, while Polymarket operates on a decentralized model with different participant demographics. Arbitrage opportunities between the two can persist due to withdrawal delays, trading fees, and the friction of moving capital across venues, allowing price gaps to remain even when the underlying event is identical.

This market resolves around Oct 2, 2026, after which the outcome is confirmed against credible public reporting. The resolution hinges on whether a federal government shutdown is in effect on October 1, 2026. Once the date passes and official sources clarify the government's operational status, the market settles based on that verified reality. Traders holding positions aligned with the actual outcome receive their payouts, while opposing positions close at a loss.

Key catalysts include congressional budget negotiations, spending bill votes, and statements from leadership about shutdown risk. Economic data, election outcomes, and shifts in party control can reshape lawmakers' incentives and willingness to compromise. Media coverage of brinkmanship, last-minute deals, or failed negotiations will likely trigger sharp price swings. Historical precedent shows that shutdown markets are most volatile in the final weeks before the deadline, as traders react to real-time legislative progress and political positioning.