Iran Ceasefire Odds Drop 17 Points in a Day
IRAN · UNITED STATES · PREDICTION MARKETS
Key Facts
- —Prediction markets Polymarket prices “no US air or missile strike on Iran” through 31 October at 64.5%, down 17.0 points in 24 hours; the 22 October line is at 74.9%, down 20.6 points (19 October, 12:32 p.m. ET).
- —Trigger We found no single reported event behind the move; the drop began at about 11:52 a.m. ET (15:52 UTC) on 19 October and was partly reversed within 20 minutes.
- —What the market measures A “Yes” needs the United States to carry out no air strike or missile strike that hits Iranian territory before the listed date.
- —What counts next Israel votes on 27 October and the US midterms are on 3 November; the market’s lines run to 31 December.
- —Volume About US$17.6 million has traded on the market in all and about US$1,198,000 in the past 24 hours.
Traders sharply cut the odds that the United States will hold off striking Iran. The 31 October contract on Polymarket stands at 64.5%, down 17.0 points in 24 hours, and the 22 October contract fell 20.6 points to 74.9%.
It matters to US readers because a renewed US-Iran exchange would hit oil prices, fuel costs and the politics of the 3 November midterms.
The move was abrupt. Polymarket’s price history shows the 31 October line near 82% until about 11:52 a.m. ET, a low of about 29% at 12:03 p.m. and about 64% by 12:22 p.m., so roughly two-thirds of the fall was reversed within 20 minutes.
What Prediction Markets Say
Polymarket, a crypto-based exchange, lists the question “US-Iran ceasefire continues through…?” with one contract per date. A contract resolves “No” if the United States carries out an air strike or a surface-to-surface missile strike, including one-way attack drones (minor short-range munitions excluded), that directly hits Iranian territory by 11:59 p.m. Iran time on the listed date; threats, intercepted missiles, naval gunfire and ground incursions do not count.
- 22 October: 74.9% “ceasefire holds”, down 20.6 points in 24 hours; about US$356,000 traded in 24 hours.
- 24 October: 68.5% “ceasefire holds”, down 23.0 points in 24 hours; about US$75,000 traded in 24 hours.
- 28 October: 70.5% “ceasefire holds”, down 15.5 points in 24 hours; about US$56,000 traded in 24 hours.
- 31 October: 64.5% “ceasefire holds”, down 17.0 points in 24 hours; about US$466,000 traded in 24 hours.
- 8 November: 54.5% “ceasefire holds”, down 13.5 points in 24 hours; about US$26,000 traded in 24 hours. This line is thinly traded.
- 15 November: 39.5% “ceasefire holds”, down 18.5 points in 24 hours; about US$32,000 traded in 24 hours. This line is thinly traded.
- 30 November: 34.5% “ceasefire holds”, down 9.5 points in 24 hours; about US$33,000 traded in 24 hours. This line is thinly traded.
- 31 December: 29.5% “ceasefire holds”, down 3.5 points in 24 hours; about US$43,000 traded in 24 hours. This line is thinly traded.
Across all contracts, about US$17.6 million has traded on the question, including about US$1,198,000 in the past 24 hours, so the market as a whole is actively traded even though the longer-dated lines are thin. Kalshi, which is regulated in the US by the CFTC, listed no comparable US-Iran contract when we looked.
Read on 19 October, 12:32 p.m. ET. These are bets, not polls and not a forecast by this newsroom; live prices are on our Prediction Markets page.
Why we show this: prediction markets turn real-money bets into a live probability that moves within minutes of the news, which is why investors, campaigns and newsrooms in the United States now follow them closely. We show them next to polls and official results, never instead of them.
Why the Odds Moved
We cannot point to one confirmed cause. The fall began at about 11:52 a.m. ET (15:52 UTC) on 19 October, and when we searched we found no report of a strike, an ultimatum or an announcement at that hour.
The backdrop is tense. On 18 October Iran’s foreign minister, Abbas Araghchi, answered Trump’s warning with the words: “Want to try your luck again? Be our guest. But be careful; we have unfinished jobs too.”
Russia’s foreign minister, Sergei Lavrov, arrived in Tehran on 19 October for talks with Araghchi and President Masoud Pezeshkian on steps to de-escalate, and presented a Russian security plan for the Gulf. The visit came after Trump warned that Washington could “finish the job” against Iran.
Our reading, not a claim from the sources: a drop this sharp that partly reverses within minutes can reflect a few large orders or a rumour, so the later price matters more than the low.
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| Instrument | Last | Change | YoY | Prev. | High | Low | Volume |
|---|---|---|---|---|---|---|---|
| BTC | 63,384 | -0.26% | -47.24% | 63,552 | 64,346 | 63,305 | 22,774,743,040 |
| ETH | 1,886 | +0.26% | -58.90% | 1,881 | 1,920 | 1,879 | 7,916,475,392 |
| SOL | 75.89 | -0.40% | -60.44% | 76.20 | 76.99 | 75.39 | 1,473,821,056 |
| XRP | 1.01 | -1.15% | -69.07% | 1.02 | 1.02 | 1.01 | 1,144,044,416 |
| BNB | 609.60 | -1.12% | -26.81% | 616.50 | 619.30 | 609.23 | 1,266,706,432 |
| ADA | 0.18 | -1.98% | -78.22% | 0.19 | 0.19 | 0.18 | 238,085,632 |
| DOGE | 0.07 | -1.56% | -70.00% | 0.07 | 0.07 | 0.07 | 553,256,192 |
| AVAX | 6.38 | +1.04% | -74.11% | 6.32 | 6.42 | 6.21 | 248,470,560 |
| LINK | 8.77 | -0.06% | -62.73% | 8.77 | 8.87 | 8.68 | 317,054,880 |
| DOT | 0.78 | -0.75% | -81.11% | 0.79 | 0.80 | 0.78 | 43,490,492 |
| LTC | 45.08 | -0.85% | -65.45% | 45.47 | 45.59 | 44.98 | 143,727,712 |
| BCH | 213.85 | +0.10% | -65.44% | 213.64 | 215.69 | 212.54 | 137,956,688 |
| TRX | 0.34 | +0.28% | -4.73% | 0.33 | 0.34 | 0.33 | 436,576,064 |
| XLM | 0.16 | -1.33% | -64.46% | 0.16 | 0.16 | 0.16 | 89,559,864 |
| HBAR | 0.07 | -0.53% | -74.67% | 0.07 | 0.07 | 0.07 | 22,546,186 |
| NEAR | 1.65 | +2.42% | -40.55% | 1.62 | 1.68 | 1.61 | 187,591,264 |
| ATOM | 1.40 | -2.36% | -70.15% | 1.44 | 1.44 | 1.40 | 18,626,964 |
| AAVE | 89.06 | +0.93% | -72.33% | 88.24 | 90.20 | 88.19 | 129,099,704 |
What It Means for US Readers
Oil is the first link. Our oil report of 9 October followed crude oil after Trump ruled out an Iran strike, and a renewed US-Iran exchange would push in the other direction, with fuel costs the channel that reaches US drivers.
Politics is the second. Our report of 16 October on the Israel-Iran ceasefire odds showed traders already doubting that a separate Israel-Iran truce would last to year-end, so doubt about the region was building before today.
For investors, our analysis is that energy and airline shares, and funds that hold them, tend to react to Gulf headlines. A price for a pause in strikes is a bet on risk, not a forecast, and it can reverse as quickly as it fell.
What It Means for Latin America and Africa
Our analysis, not a claim from the sources: a renewed war would matter most through oil. Crude exporters such as Brazil, Colombia, Nigeria and Angola would tend to gain from higher prices, while fuel importers in both regions would pay more at the pump and for freight.
Latin America is also tied to the Iran file by sanctions. Washington sanctioned a Cuban bank over Iran ties, as we reported in US Sanctions Cuban Bank Over Iran Ties.
See our Latin America odds page and Africa odds page for regional markets.
What Is Not Known
It is not known what moved the price at noon on 19 October, or whether any US strike is planned. Trump’s public warnings and Iran’s replies are threats, which the market’s rules do not count as strikes.
It is also not known whether the rebound reflects new information or simply the correction of a thin book. Several lines trade only a few thousand dollars a day, so a few large orders can move them.
Finally, the market covers only direct US air and missile strikes on Iranian territory, so attacks on ships or by proxies would not settle it.
Frequently Asked Questions
What are prediction markets saying about a US strike on Iran?
Polymarket prices “no US strike on Iran” through 31 October at 64.5% and through 22 October at 74.9% as of 19 October, 12:32 p.m. ET.
How far did the odds move?
The 31 October contract fell 17.0 points in 24 hours and the 22 October contract fell 20.6 points. Most of the fall came within minutes between 11:52 a.m. and 12:03 p.m. ET, and roughly two-thirds of it was reversed by 12:22 p.m.
What does the Polymarket contract measure?
It resolves “No” if the United States carries out an air strike or surface-to-surface missile strike that directly hits Iranian territory by the listed date. Threats, intercepted missiles and ground incursions do not count.
Why did the odds move?
We found no single reported trigger. The backdrop is a tense standoff, with Lavrov in Tehran on 19 October and Trump warning that Washington could “finish the job”.
Does a market price mean a strike will happen?
No. Prediction market prices are bets by traders, not forecasts by this newsroom or by any government, and they can reverse as news arrives.
Sources: Abbas Araghchi, Iran’s foreign minister, 18 October 2026, as reported in Fox News live coverage · The National, “Russia’s Lavrov heads to Tehran as Gulf states press Moscow over Iran attacks”, 19 October 2026 · Polymarket and Kalshi public market data (read 19 October, 12:32 p.m. ET, 2026).
This article was produced by The Rio Times’ automated newsroom system. How we use AI · Report an error · Editorial responsibility: Matthias Camenzind, Editor-in-Chief