Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Kalshi Fees) Pick polygram.ink (preferred broker) |
45% | 55% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Place a position → |
Polymarket (direct) polymarket.com |
45% | 55% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Place a position → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Place a position → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Place a position → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Place a position → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| August 31 | 45% |
| July 31 | 33% |
| July 17 | 1% |
Market context
Houthi forces in Yemen are actively attempting kinetic strikes on or seizure of commercial vessels in the Red Sea, excluding military targets and intercepted missile attempts. This ongoing campaign, driven by Iran-backed support and aimed at disrupting global trade over the Gaza conflict, defines the real-world event underpinning the market.
Historically, the 2% implied probability reflects a gap between high attack frequency and low successful kinetic impact. Since November 2023, the group has targeted over 300 ships using drones and missiles, yet most strikes missed or caused negligible damage, with only two confirmed sinkings and one capture as of early 2024[2][7]. A significant escalation occurred in July 2025 when two cargo vessels were sunk and crew detained, marking the first major surge in seven months[3][10]. For a power-user building a copy-trading bot, this historical data suggests the market is pricing in the high failure rate of interceptions rather than the group’s intent, requiring conditional orders that trigger only on verified sinkings or boardings rather than launch announcements.
Traders must monitor Iranian weapons shipments and Houthi announcement schedules for new shipping restrictions, as these often precede kinetic escalations. Recent US and UK strikes on over sixty Houthi targets in January 2024 aimed to degrade this capability, yet the group continues to receive drones and missiles smuggled via Iran[6][11]. A key dependency is the success of the twenty-country naval task force protecting commercial routes; if this defence falters, the probability of a successful strike rises sharply. Programmatic approaches should flag Reuters or Washington Institute incident tracker updates for confirmed sinkings, as these are the primary settlement triggers[4][10].
Methodology
This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Kalshi Fees, which mirrors the Polymarket order book directly.
Resolution & payout
At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.
On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.
FAQ
- Is this market available outside the US?
- Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.
- How does resolution work?
- Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.
- What does Polymarket cost to trade?
- Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.
- Do I need to KYC for this market?
- On Polymarket directly, no — it's wallet-based. Intermediary brokers like Kalshi Fees trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.
- How reliable are the quoted odds?
- The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.
Trade Houthis successfully target shipping by 2026? on Kalshi Fees
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