Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Review UK) Pick polygram.ink (preferred broker) |
19% | 81% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
19% | 81% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Trade this market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Trade this market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Trade this market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Trade this market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 180-199 | 19% |
| 200-219 | 18% |
| 160-179 | 14% |
| 220-239 | 14% |
| 240-259 | 11% |
| 140-159 | 8% |
| 260-279 | 7% |
| 120-139 | 4% |
| 280-299 | 3% |
| 300-319 | 2% |
| 100-119 | 1% |
| 320-339 | 1% |
| 340-359 | 1% |
| 360-379 | 1% |
| <20 | 0% |
| 20-39 | 0% |
| 40-59 | 0% |
| 60-79 | 0% |
| 80-99 | 0% |
| 380-399 | 0% |
| 400-419 | 0% |
| 420-439 | 0% |
| 440-459 | 0% |
| 460-479 | 0% |
| 480-499 | 0% |
| 500+ | 0% |
Market context
The event is simply how many main-feed posts, reposts and quote posts Elon Musk makes on X in the one-week window from 11 August to 18 August 2026, with replies excluded unless they appear on the main feed and are captured by the tracker. The live tracker currently shows **0 tweets** for the contract window, so the crowd-implied 0% YES reflects the fact that the counted activity has not started yet and there is no accumulated baseline inside the settlement period.[1][2]
For calibration, Musk’s X activity has historically been highly variable, so programmatic traders usually treat this kind of market as a counting problem rather than a directional call: ingest the feed, classify only eligible post types, and reconcile the tracker with X itself if needed. Polymarket’s own August 2026 monthly market describes him as posting at an elevated rate on X, often **30–70 tweets daily**, which is enough to keep weekly totals large and noisy even before considering deletions, reposts or bursty commentary around live events.[11] Recent short-window markets have also shown that the exact count bands can move quickly when a fresh posting run lands, so the practical edge is in monitoring the feed continuously rather than relying on headline sentiment.[10][14]
The main catalysts are scheduled product, corporate and political touchpoints that can prompt sudden posting spikes, especially if they involve Tesla, SpaceX, X or DOGE-related commentary. Traders running this programmatically would want to watch for earnings dates, launches, policy announcements, major media coverage and any X-side tracking glitches, because deleted posts still count if captured and the settlement process can fall back to X if the tracker misbehaves.[11][15] A useful recent example of a catalyst is the 7 August audit report saying DOGE overstated savings on federal receipts data, which is the sort of external story that can generate a concentrated run of posts, replies routed onto the main feed, and quote-post activity inside a short settlement window.[15]
Methodology
This page reviews Elon Musk # tweets August 11 - August 18, 2026? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Polymarket Review UK, which mirrors the Polymarket order book at 0% fees.
Resolution & payout
Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.
Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.
UK Frequently Asked Questions
- Where can I trade this market with the lowest fees?
- Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Polymarket Review UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
- 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.
- Is Polymarket legal in the UK?
- Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.
- Do I pay tax on prediction market profits in the UK?
- UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.
- How do I deposit on Polymarket from the UK?
- UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.
Trade Elon Musk # tweets August 11 - August 18, 2026? on Polymarket Review UK
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