Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via PolyGram) Pick polygram.ink (preferred broker) |
56% | 44% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
56% | 44% | 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 |
|---|---|
| 40-64 | 56% |
| <40 | 23% |
| 65-89 | 21% |
| 90-114 | 4% |
| 115-139 | 1% |
| 140-164 | 0% |
| 165-189 | 0% |
| 190-214 | 0% |
| 215-239 | 0% |
| 240+ | 0% |
Market context
Polymarket is pricing this Elon Musk X-post count contract at **20% YES**, with traders buying and selling conditional tokens in USDC on Polygon around a settlement window that runs from 8 August 12:00 PM ET to 10 August 12:00 PM ET. The market resolves on the tracker’s post count for @elonmusk, and only main-feed posts, quote posts and reposts count; replies do not, except where the tracker records them as main-feed replies, so execution risk sits in the counting rules as much as in Musk’s raw posting cadence.[2]
The historical pattern has usually been volatile rather than steady. Musk can move from low-volume days to very active stretches, and recent tracker-linked output has shown counts of 38 posts on 3 August, 44 on 6 August and 95 on 1 August, which keeps the higher bands in play if he uses X heavily over the weekend.[7][8][10] That matters because this market is not about whether he says something important, but whether he clears the relevant count once reposts and quote posts are included under the tracker’s rules.[2]
Traders should watch for any product, political or legal catalyst that could pull him back onto X for bursts of posting, because the count can jump quickly when he is commenting in real time. A useful historical reminder is that Musk’s posts have previously moved markets and triggered regulatory scrutiny, including the 2018 Tesla “take private” tweet that shocked investors.[5] For this contract, the practical checklist is simple: monitor his posting frequency, any major X- or Tesla-related announcements, and whether the tracker remains in sync with X before settlement, since the market’s resolution source can fall back to X if the tracker misbehaves.[2]
Methodology
Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.
Resolution & payout
Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.
Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.
UK Frequently Asked Questions
- 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.
- 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 8 - August 10, 2026? on PolyGram
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