Bitcoin price on May 31?

Platform comparison

Active sub-markets

Market context

Bitcoin's spot price at noon ET on 31 May 2026 will be measured against Binance's 1-minute candle close for BTC/USDT. The market's 0% implied probability suggests traders expect either the market to resolve "No" (data unavailable or settlement failure) or that the specific price bracket has been deemed implausible. Across platforms, this distinction matters: Polymarket's binary YES/NO structure differs from Kalshi's range-bracket approach, where ties favour the higher bracket if settlement lands between two thresholds. Betfair's lay-betting mechanics and Smarkets' decimal odds presentation create different friction points for traders hedging tail outcomes around data integrity.

Historical Bitcoin volatility over comparable 18-month windows—from late 2024 through mid-2026—provides limited precedent for this exact settlement date. Prior Binance-sourced spot markets have resolved cleanly, though exchange maintenance windows and API delays have occasionally triggered dispute periods. The absence of competing liquidity on alternative venues (CME futures, spot ETFs) means Binance's noon ET close becomes a single point of failure; traders on Kalshi or Smarkets face identical execution risk, whilst Polymarket's reliance on Binance data mirrors this dependency.

Catalysts through May 2026 include Federal Reserve policy shifts, Bitcoin's halving cycle effects (last occurred April 2024), and macroeconomic inflation data releases. Regulatory announcements from the SEC regarding spot Bitcoin ETF custody rules, or geopolitical events affecting energy costs for mining, could drive directional moves. The 0% probability may reflect either illiquidity in this specific bracket or trader consensus that the true price range lies elsewhere—a signal worth cross-checking against order-book depth on competing platforms before committing capital.

Methodology

We read Bitcoin price on May 31? from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live quote comes directly from the Polygon order book; the other three are listed with their platform attributes — fees, KYC, settlement currency, payment options — because a 1:1 contract comparison without API access would be guesswork.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). Kalshi Alternative UK routes every trade directly into Polymarket's on-chain settlement, which is why payouts land fastest.

FAQ

Where can I trade this market with the lowest fees?

On Kalshi Alternative UK, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

What does it cost to trade on Kalshi Alternative UK?

Zero. Kalshi Alternative UK routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Kalshi Alternative UK triggers a quick verification flow that finishes in minutes.