What caused the FAA's nationwide ground stop? Kalshi odds
On Kalshi, the busiest line, SMART system, is at 16%. The market settles by Dec 1, 2026, and $589K traded in the last 24 hours. Each contract pays $1 if it is right, so 16¢ reads as a 16% chance. Polymarket lists it too, and we compare the two prices below.
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Also on Polymarket: Polymarket's page
Kalshi · odds · updated
Also priced on Polymarket: 5 questions compared ↓
Kalshi odds on every outcome
| Outcome | Chance | Yes price | 24h volume | |
|---|---|---|---|---|
| SMART system compare | 16% | 16¢ | $91K | Trade |
| Maintenance/upgrade compare | 88% | 88¢ | $79K | Trade |
| Software/config error | 72% | 72¢ | $57K | Trade |
| L3Harris | 95% | 95¢ | $54K | Trade |
| Contractor failure compare | 88% | 88¢ | $53K | Trade |
| AI system error | 9% | 9¢ | $53K | Trade |
| Human error | 14% | 14¢ | $44K | Trade |
| System failure compare | 95% | 95¢ | $43K | Trade |
| Physical damage compare | 7% | 7¢ | $28K | Trade |
| Verizon | 4% | 4¢ | $10K | Trade |
Show 1 more outcome
| Outcome | Chance | Yes price | 24h volume | |
|---|---|---|---|---|
| Specific cause confirmed | 99% | 99¢ | $78K | Trade |
Chance is each outcome's Yes price on Kalshi. A Yes contract at 16¢ pays $1 if that outcome wins.
Kalshi vs Polymarket on these questions
The same questions on both venues. When the prices differ, the cheaper side costs you less for the same payout.
| Venue | Yes | No | Fee | 24h volume | Liquidity | |
|---|---|---|---|---|---|---|
| PolymarketClose-only for US residents | 98¢ | 2¢ | 0.1¢ | $3K | $4K | Trade → |
| Kalshi$50 bonus | 95¢ | 6¢ | – | $43K | – | Trade → |
| Venue | Yes | No | Fee | 24h volume | Liquidity | |
|---|---|---|---|---|---|---|
| PolymarketClose-only for US residents | 74¢cheapest to buy | 27¢ | 0.8¢ | $9K | $2K | Trade → |
| Kalshi$50 bonus | 88¢ | 13¢ | – | $79K | – | Trade → |
| Venue | Yes | No | Fee | 24h volume | Liquidity | |
|---|---|---|---|---|---|---|
| PolymarketClose-only for US residents | 74¢cheapest to buy | 27¢ | 0.8¢ | $2K | $956 | Trade → |
| Kalshi$50 bonus | 88¢ | 13¢ | – | $53K | – | Trade → |
| Venue | Yes | No | Fee | 24h volume | Liquidity | |
|---|---|---|---|---|---|---|
| PolymarketClose-only for US residents | 2¢cheapest to buy | 98¢ | 0.1¢ | $10K | $19K | Trade → |
| Kalshi$50 bonus | 16¢ | 85¢ | – | $91K | – | Trade → |
| Venue | Yes | No | Fee | 24h volume | Liquidity | |
|---|---|---|---|---|---|---|
| PolymarketClose-only for US residents | 1¢cheapest to buy | 99¢ | <0.1¢ | $4K | $5K | Trade → |
| Kalshi$50 bonus | 7¢ | 94¢ | – | $28K | – | Trade → |
How the odds have moved
Kalshi's own series for the outcome the headline prices, from where its history starts; one venue, not a blend.
How this market resolves
The market asks: “Will it be confirmed that a problem with the FAA's SMART air traffic management system caused the FAA's nationwide ground stop on Nov 13?” Each outcome is its own contract: it pays $1 if it is the answer, and nothing if not. Kalshi publishes the full settlement rules on the market's page. Read them on Kalshi (opens in a new tab)
Scheduled resolution: Dec 1, 2026.
How to trade this market on Kalshi
- Check your state first. A few states restrict some contracts.
- Open a Kalshi account. Our Kalshi app review covers sign-up and payouts.
- Buy Yes or No at the price shown, 16¢ for SMART system right now. Each contract pays $1 if you are right.
- Sell any time before it settles, or hold to the result. Kalshi's fees apply to each trade.
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Common questions
What are the Kalshi odds on “What caused the FAA's nationwide ground stop?”?
On Kalshi, the busiest line, SMART system, is at 16%. That is a market-implied probability, not a forecast, and it moves as traders buy and sell.
How does this market resolve?
By Kalshi's own settlement rules for this market. Two venues can word the same question differently and settle differently, so read them before you trade.
Is this question on Polymarket too?
Yes. Polymarket's page has its prices and rules. The 5 questions both venues price are compared above, each with its own side-by-side page.
Can I trade this market in my state?
In most states, yes, on Kalshi. A few states have acted against some contracts. Check your state first.
How accurate are Kalshi odds?
Often more accurate than polls, though never certain. A price of 70% should lose three times in ten. How accurate prediction markets are has the research.
What does it cost to trade on Kalshi?
A trading fee on each contract, largest near 50¢ and smaller towards either end. Kalshi's fees has the formula.