Prediction Market Arbitrage: 10 Opportunities Surfaced by StartupHu…

Our proprietary cross-venue engine at StartupHub.ai has just surfaced 10 prediction market arbitrage opportunities, where the same real-world event is priced differently across venues like Polymarket, Kalshi/Robinhood, and PredictIt. An arbitrage lock occurs when buying 'YES' on one market and 'NO' on another for the same event totals less than $1, guaranteeing a payout.

These spreads, while offering a guaranteed return, can close rapidly. It's crucial for participants to consider potential fees, KYC requirements, and withdrawal limits, as these can impact net profitability. This information is for informational purposes only and should not be considered financial advice.

Live arbitrage right now These update automatically. Tap a leg to open the venue. Not financial advice.

Where will Putin and Zelenskyy next meet? Will Putin and Zelenskyy meet next in Switzerland?. Arbitrage: 16.5% ROI, locks 14c per $1. Buy YES on Polymarket at 3c, buy NO on Kalshi / Robinhood at 83c.
French presidential election: who will advance? Will François Hollande qualify for the runoff in the 2027 French presidential election?. Arbitrage: 7.4% ROI, locks 7c per $1. Buy YES on Polymarket at 0c, buy NO on Kalshi / Robinhood at 93c.
Who will leave Trump's Cabinet next? Will Robert F. Kennedy Jr. be the next person to leave the Trump Cabinet?. Arbitrage: 7.0% ROI, locks 7c per $1. Buy YES on Kalshi / Robinhood at 22c, buy NO on Polymarket at 72c.
2028 Democratic VP nominee Will Josh Shapiro be the nominee for the Vice Presidency for the Democratic party?. Arbitrage: 5.3% ROI, locks 5c per $1. Buy YES on Kalshi / Robinhood at 4c, buy NO on PredictIt at 91c.
Who will be the Prime Minister of Israel after the 2026 election?, Yair Lapid. Arbitrage: 5.1% ROI, locks 5c per $1. Buy YES on Polymarket at 0c, buy NO on PredictIt at 95c.
Who will win the next French presidential election?, Gérald Darmanin. Arbitrage: 4.9% ROI, locks 5c per $1. Buy YES on Polymarket at 0c, buy NO on PredictIt at 95c.
Where will Putin and Zelenskyy next meet? Will Putin and Zelenskyy meet next in Ukraine?. Arbitrage: 3.7% ROI, locks 4c per $1. Buy YES on Polymarket at 0c, buy NO on Kalshi / Robinhood at 96c.
Who will win the 2028 Democratic presidential nomination?, Kamala Harris. Arbitrage: 3.6% ROI, locks 3c per $1. Buy YES on Polymarket at 9c, buy NO on PredictIt at 88c.
2028 Democratic presidential nominee Will Mark Kelly be the Democratic Presidential nominee in 2028?. Combined cost 97c (no lock right now). Buy YES on Polymarket at 3c, buy NO on Kalshi / Robinhood at 94c.
Prime Minister of Sweden after the general election? Magdalena Andersson:: Social Democrats. Combined cost 98c (no lock right now). Buy YES on Kalshi / Robinhood at 87c, buy NO on Polymarket at 11c.

See the full live arbitrage board or poll the free JSON API.

Track these live, or poll the free API

The board above refreshes on its own, so this page stays current long after today. The full cross-venue feed lives on the arbitrage board, and every match is also a free JSON API and an MCP tool, so a trading agent can poll live Polymarket, Kalshi and PredictIt arbitrage opportunities and act on them.

curl https://www.startuphub.ai/api/v1/arbitrage?arbs_only=1

Read the arbitrage API reference or open the live JSON endpoint.

Focused guides: Polymarket arbitrage, Kalshi arbitrage, and the arbitrage bot API.

Informational feed, not financial advice. Live arbitrages are often fleeting, and fees, gas, KYC and withdrawal limits eat into the spread. Verify each market’s resolution rules and costs before trading.

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Prediction Market Arbitrage: 10 Opportunities Surfaced by StartupHub.ai Engine

Track these live, or poll the free API