Bitcoin Up or Down - August 17, 8:40AM-8:45AM ET

Platform comparison

Market context

This market resolves based on whether Bitcoin's five-minute time-weighted average price, as measured by Chainlink's BTC/USD TWAP feed, closes at or above its opening level during the specified window on 17 August 2026. The settlement occurs roughly four hours after the window closes, allowing Chainlink data to finalise before resolution.

The 100% crowd probability reflects the inherent difficulty in predicting five-minute price movements with meaningful conviction. Historical analysis of intraday Bitcoin volatility shows that ultra-short windows—particularly those under ten minutes—exhibit near-random walk behaviour, with closing prices finishing above opening levels roughly 50% of the time across comparable periods. This suggests the current probability assignment may reflect either illiquidity in the market's order book or traders' reluctance to take directional positions on such granular timeframes rather than genuine confidence in upward movement.

Traders monitoring this market should watch for macroeconomic data releases or Federal Reserve communications scheduled between 8:40 and 8:45 AM ET on that date, as these can trigger sharp intraday moves across risk assets including Bitcoin. Currency movements, particularly USD strength, often correlate with Bitcoin price action during volatile news windows. The Chainlink TWAP methodology smooths out individual exchange spikes, so flash crashes or exchange-specific anomalies will have limited impact on final resolution. Monitoring Bitcoin's price action in the minutes immediately preceding the window will provide the most relevant baseline for assessing directional risk.

Methodology

Political prediction markets differ structurally from sports betting: thinner liquidity, longer settlement windows, higher sensitivity to single news events. This page shows the live Polymarket quote for Bitcoin Up or Down - August 17, 8:40AM-8:45AM ET plus platform attributes for the three reference venues, so you can see at a glance where the deepest market for this question sits.

Resolution & payout

Political markets typically settle on official candidate or agency confirmation. Polymarket uses UMA Optimistic Oracle: a proposer posts the outcome with a bond, the two-hour window opens, then the smart contract pays USDC.

Kalshi settles USD via CFTC clearinghouse, with clearly defined resolution sources (e.g. AP race calls for elections). Betfair settles after the official outcome is registered with the league or agency. Manifold is play-money.

UK Frequently Asked Questions

How accurate are political prediction markets?

Historically more accurate than polls. Polymarket's Brier score on US 2024 elections was ~0.11 — better than 538 (~0.14) and every mainstream poll. Markets aggregate information with real skin in the game.

What resolution source is used for elections?

Polymarket defines the source per contract — usually Associated Press (AP Race Call), Reuters or the official electoral commission. The source is stated in contract details before the market opens.

Can prediction markets influence election outcomes?

Markets reflect expectations rather than create them. Studies show public-facing markets can anchor expectations, but don't influence the underlying outcome. Political markets are information, not advocacy.

Which platform has the deepest political liquidity?

Polymarket — by far. US 2024 presidential volume was ~$3.5B vs Kalshi (~$200M) and Betfair (~$120M). Where Polymarket is geo-blocked, brokers like Trump Prediction route into the same order book at 0% fees.

Are UK election prediction markets available from the UK?

Yes. Betfair Exchange and Smarkets offer UKGC-regulated UK election markets (seat counts, party share, constituency results). Polymarket also lists UK election contracts with deeper global liquidity. Betfair winnings are typically tax-free for UK individuals; Polymarket profits are subject to HMRC CGT.