SimpleFunctions

December 31 · US military action against Cuba by

December 31 is priced at 39¢ on Polymarket. Current book: 38¢ bid, 39¢ ask, 1¢ spread. This page tracks a standalone prediction-market contract.

Price history

39¢ current

+1¢
40¢50¢60¢
May 7, 2026Jun 7, 2026

Contract brief

This market will resolve to "Yes" if a US-initiated drone, missile, or air strike on the soil of Cuba is announced or credibly reported to have occurred by the listed date ET. Otherwise, this market will resolve to "No". For the purposes of this market, a qualifying "strike" is defined as the use of aerial bombs, drones, or missiles (including FPV and ATGM strikes as well as cruise or ballistic missiles) launched by any United States operatives, including military forces, intelligence agencies, or other U.S. government operatives, that physically impact ground territory within the listed country. A strike on any area within the terrestrial territory (including rivers, lakes, ports, but excluding territorial sea) of the listed country counts. Missiles or drones that are intercepted and surface-to-air missile strikes will not be sufficient for a "Yes" resolution, regardless of whether they land territory or cause damage. Actions such as artillery fire, small arms fire, ground incursions, naval shelling, or cyberattacks will not qualify. Any strike occurring during this market’s timeframe that is claimed by either Donald Trump or the U.S. government will qualify. The primary resolution source will be a consensus of credible reporting. This market will remain open until the end of the second day after the resolution time. If the date/time of a qualifying strike cannot be confirmed by a consensus of credible reporting by that time, it will resolve to "No" regardless of whether a strike was later confirmed to have taken place.

Outcome

December 31

Rank

Standalone

Leader

Range

Family volume

$3.6M

Identifier

0x3de0f3d7...7de0

Jun 7, 2026, 4:08 AM UTC · 8m ago

Implied probability

39¢
Latest venue quote
Jun 7, 2026, 4:08 AM UTC · 8m ago

Bid

38¢

Ask

39¢

Spread

24h volume

$148K

Family rank

Standalone

Standalone contract

Closes

Dec 31, 2026

Family volume

$3.6M

Orderbook snapshot

38 / 39¢

Polymarket
1¢ spread
BidSize
38¢3.6K
37¢5.6K
36¢9.2K
35¢2.3K
34¢25
33¢5.1K
32¢120
31¢536
AskSize
39¢2
40¢4.0K
41¢11K
42¢9.2K
43¢6.3K
44¢1.3K
45¢1.6K
46¢839

Contract terms

What resolves this market.

YES condition

This market will resolve to "Yes" if a US-initiated drone, missile, or air strike on the soil of Cuba is announced or credibly reported to have occurred by the listed date ET. Otherwise, this market will resolve to "No". For the purposes of this market, a qualifying "strike" is defined as the use of aerial bombs, drones, or missiles (including FPV and ATGM strikes as well as cruise or ballistic missiles) launched by any United States operatives, including military forces, intelligence agencies, or other U.S. government operatives, that physically impact ground territory within the listed country. A strike on any area within the terrestrial territory (including rivers, lakes, ports, but excluding territorial sea) of the listed country counts. Missiles or drones that are intercepted and surface-to-air missile strikes will not be sufficient for a "Yes" resolution, regardless of whether they land territory or cause damage. Actions such as artillery fire, small arms fire, ground incursions, naval shelling, or cyberattacks will not qualify. Any strike occurring during this market’s timeframe that is claimed by either Donald Trump or the U.S. government will qualify. The primary resolution source will be a consensus of credible reporting. This market will remain open until the end of the second day after the resolution time. If the date/time of a qualifying strike cannot be confirmed by a consensus of credible reporting by that time, it will resolve to "No" regardless of whether a strike was later confirmed to have taken place.

Venue

Polymarket

Closes

Dec 31, 2026

Identifier

0x3de0f3d7…7de0

SF Signal
SF Index
268.96
Regime
neutral

Event family

US military action against Cuba by.

The same race as a probability stack: rank, volume, and where this contract sits against the other outcomes.

Total volume

$3.6M

Outcomes

1

Highest price

December 31 39¢

Current share

100%

Indicators

Yield, cliff risk, volatility, and regime.

IY (Yes)

276.0%

IY (No)

112.8%

Adj IY

269%

CRI

2

RV

306%

VR

2.01

Regime

neutral

Score

0.392

Observability

medium

Event type

political

Full indicator table

276.0%
112.8%
Adj IY
269%
2
RV
306%
VR
2.01
IAR
1.6/h
30.000
LAS
0.03

Odds pages

Related prediction questions

Browse odds

Related readings

Matched from SimpleFunctions blog, opinions, technical guides, concepts, and learn pages.

Browse library
Conceptmethodology

Cross-Venue Convergence Dynamics: Why Kalshi and Polymarket Converge — and When They Don't

Why the same outcome on Kalshi and Polymarket usually trades within 2-5 cents — and the three specific things that cause the gap to widen. Diagnostic guide and worked convergence trade.

Blogmarkets

Kalshi vs Polymarket: Which Prediction Market Should You Trade?

In-depth comparison of Kalshi and Polymarket for prediction market traders. Regulatory structure, liquidity, fees, API tooling, and cross-venue trading with SimpleFunctions.

Conceptmethodology

Resolution Risk Premium: Pricing the Rule, Not the Outcome

When the resolution rule is fuzzy, the price is the market's estimate of how the rule will be interpreted, not the outcome's probability. Three case studies and the discount math.

Conceptmethodology

Maker / Taker Regime in Prediction Markets: How to Read the Orderbook State

Three regime states (maker-dominated, taker-dominated, neutral) and how to read which one a Kalshi or Polymarket contract is in. Strategy follows regime, not thesis.

Opinionanalysis

Liquidity Availability Is the Real Edge in Prediction Markets

Implied yield, cliff risk, and overround all describe what to trade. Liquidity Availability Score describes whether the orderbook can absorb the trade. Why LAS is the indicator that decides who actually books P&L.

Opinionanalysis

Implied Yield vs Raw Probability: Why Bond-Adjacent Prediction Markets Need a Different Lens

Why fixed-income-adjacent prediction-market contracts need to be priced in implied yield, not raw probability, with two real Kalshi Fed-decision contracts as a case study.

SimpleFunctions context

Index, screen, query, and monitor.

Open index

How we compute these odds

SimpleFunctions aggregates live prediction-market contracts from Kalshi and Polymarket. Each slug groups contracts that resolve on the same underlying event, identified by venue event_id.

For binary slugs, the headline probability is the liquidity-weighted mid-price across all bound contracts. For multi-outcome slugs (e.g. elections with 3+ candidates), the headline is the leader’s price; we never arithmetically average disjoint outcomes — that would produce a number with no real-world meaning.

Snapshots refresh every 5 minutes during market hours; daily aggregates are computed at 04:00 UTC. The 30-day sparkline is drawn from per-ticker daily means stored in market_indicator_daily; 24h delta and movement events are derived from the same source.