Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via BTC Prediction) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open live market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open live market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open live market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open live market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| $750 | 100% |
| $745 | 100% |
| $740 | 100% |
| $735 | 100% |
| $730 | 100% |
| $780 | 0% |
| $775 | 0% |
| $770 | 0% |
| $765 | 0% |
| $760 | 0% |
| $755 | 0% |
Market context
The underlying event is the closing price of the S&P 500 ETF (SPY) on 16 July 2026, which determines whether the contract settles YES or NO. As of midday on that date, SPY trades at $754.81, just below its 52-week high of $760.40 and slightly above its all-time closing peak of $757.62 recorded in early June [1][4]. The crowd-implied probability of 0% YES suggests traders expect the market to close below the specified threshold, despite the ETF’s proximity to record levels.
Historically, SPY has shown strong resilience in mid-July, often consolidating near yearly highs before autumn volatility. In 2025 and 2024, the ETF closed above $678 and $576 respectively in July, reflecting sustained upward momentum through the summer [4]. The current 0% probability is anomalous given SPY’s $754.81 level, implying either a very high strike price or a market-wide expectation of a sharp intraday reversal. Comparable cases from 2020–2021 show similar mid-year peaks followed by corrections, but none produced a 0% implied probability when prices hovered near all-time highs [4].
Traders should monitor US equity futures, funding rates on BTC and ETH perps, and any Fed commentary scheduled for the week. A sudden spike in negative funding rates or whale outflows from USDC could signal risk-off sentiment that drags equities lower. Recent crypto data from Convex shows SPY’s intraday volatility has increased 12% week-on-week, correlating with elevated BTC funding rate dispersion [1]. Any announcement on inflation data or geopolitical developments before 20:00 UTC will likely dictate the final settlement outcome.
Methodology
This page reads S&P 500 (SPY) closes above … on July 16? on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed alongside for venue context. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.
Resolution & payout
Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.
Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.
FAQ
- What are crypto prediction markets?
- Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.
- What does a transaction cost on Polygon?
- Polygon gas is typically under $0.01 per transaction. A full trade cycle (Approve + Order + Fill) totals around $0.03 — compared to $5-50 on Ethereum mainnet.
- How volatile are crypto prediction markets?
- Crypto markets react to spot prices — a 5% BTC move typically shifts a "BTC above X by date" market 10-20%. Polymarket crypto market liquidity is usually six-figure USD, sufficient for active trading.
- Which crypto markets exist on Polymarket?
- Currently active markets include BTC/ETH/SOL price targets, halving dates, ETF approvals, hard-fork outcomes and Layer-2 TVL thresholds. The list updates weekly; biggest volume sits on BTC and ETH price forecasts.
- Are crypto prediction markets taxable in the US?
- In the US, prediction market gains are typically treated as ordinary income or short-term capital gains depending on holding period. Consult a tax professional for your specific situation — we cannot provide tax advice.
Trade S&P 500 (SPY) closes above … on July 16? on BTC Prediction
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