Predict.funPredict.fun arbitrage: fees, linked markets and live spreads
Predict.fun is a BNB Chain prediction market that mirrors many Polymarket and Kalshi events and says so in its data. That makes it the cleanest source of cross-venue pairs we scan: the match is by market ID, not by guessing from the wording.
Predict.fun in the latest scan
Top Predict.fun spreads right now
High-confidence matches with real depth, sorted by quality. Prices link to each venue; read both markets' rules before trading.
| Event | Buy YES | Buy NO | ROI | Ends | Profit on $1,000 |
|---|---|---|---|---|---|
| Bitcoin Up or Down - October 25, 2:20PM-2:25PM ET — UpUp or Down | PF 42.0¢ | PM 48.0¢ | 9.08% | 1h | $5.82 |
| Trump out as President before 2027?Politics | PF 3.2¢ | OP 94.0¢ | 2.58% | 2mo | $25.75 |
| Avengers: Doomsday: Rotten Tomatoes score — Above 70Entertainment | KS 80.0¢ | PF 17.0¢ | 1.56% | 57d | $15.64 |
| Serie A: 2027 Champion — Inter MilanSoccer | PF 60.1¢ | PM 37.0¢ | 1.88% | 7mo | $7.38 |
| Valantis FDV above ___ one day after launch? — $100MCrypto | PF 15.2¢ | PM 81.0¢ | 2.69% | 14mo | $17.75 |
| NBA: 2027 Champion — Minnesota TimberwolvesNBA Finals | PM 4.6¢ | PF 94.5¢ | 0.80% | 8mo | $7.69 |
| Presidential Election Winner 2028 — Kamala HarrisPresident | PM 3.8¢ | PF 94.8¢ | 1.31% | 24mo | $10.81 |
| Presidential Election Winner 2028 — Marco RubioPresident | PM 9.1¢ | PF 89.5¢ | 1.20% | 24mo | $5.35 |
How Predict.fun works
Predict.fun lists YES/NO markets on politics, sports, crypto and culture, traded on an order book and settled on BNB Chain. A winning share redeems for $1. Collateral that isn't in an open order can be routed to a lending protocol for yield, which slightly changes the carry cost of holding a long-dated spread.
Many Predict.fun markets are copies of Polymarket or Kalshi markets, and the API states which one. ArbSonar uses those links directly, so a Predict.fun–Polymarket pair is an exact match with a 100% confidence score.
The Predict.fun fee
The taker fee is the market's base rate times the smaller of price and 1 − price. A 2% rate costs 0.2¢ per share at 10¢ and 1¢ per share at 50¢. ArbSonar reads the rate for each market and includes it in the leg.
On-chain gas is low on BNB Chain, and trades through Binance Wallet have had gas sponsored, so gas rarely changes the math on a normal-size spread.
What to watch on Predict.fun
A linked market mirrors the event, but it can still have its own resolution wording and end time. Read both rule sets on longer-dated markets, where a small wording difference has more time to matter.
Depth varies a lot. Popular political and sports markets hold real size; long-tail copies may hold very little at the best ask. The scanner refreshes Predict.fun order books for every market in a pair and caps profit at the quoted size.
Spreads by partner venue
307 spreads with Polymarket
36 spreads with Kalshi
13 spreads with Limitless
2 spreads with OpinionPredict.fun questions
What is Predict.fun?
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Predict.fun is a prediction market on BNB Chain where you buy YES or NO shares that pay $1 if correct. Many of its markets mirror Polymarket and Kalshi events.
How are Predict.fun fees calculated?
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The taker fee is the market's base rate multiplied by min(price, 1 − price). ArbSonar reads the rate for each market from the Predict.fun API and includes it in the spread.
Why do most Predict.fun spreads pair with Polymarket?
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Because Predict.fun publishes the Polymarket market ID for the markets it mirrors. Those links give exact pairs, and Polymarket has the most markets to link to.