Prediction Market Arbitrage: 8 Live Opportunities I…

StartupHub.ai's proprietary cross-venue engine has identified 10 prediction market arbitrage opportunities as of August 18, 2026. These opportunities arise when the 'YES' price on one venue and the 'NO' price on another for the same real-world event sum to less than $1, guaranteeing a profit regardless of the outcome.

Eight of these spreads are currently live, offering immediate potential for traders. The remaining two were observed within the last hour and may have already closed, underscoring the fast-moving nature of these markets. It is crucial to remember that spreads can close rapidly, and factors like fees, KYC requirements, and withdrawal limits can impact actual returns. This information is for educational purposes only and does not constitute financial advice.

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

Will Trump recognize Somaliland? :: During Trump's term. Arbitrage: 60.5% ROI, locks 38c per $1. Buy YES on Polymarket at 8c, buy NO on Kalshi / Robinhood at 54c.
Who will leave Trump's Cabinet next? Will Pete Hegseth be the next person to leave the Trump Cabinet?. Arbitrage: 17.6% ROI, locks 15c per $1. Buy YES on Kalshi / Robinhood at 13c, buy NO on Polymarket at 72c.
Where will Putin and Zelenskyy next meet? Will Putin and Zelenskyy meet next in Switzerland?. Arbitrage: 12.0% ROI, locks 11c per $1. Buy YES on Polymarket at 0c, buy NO on Kalshi / Robinhood at 89c.
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 Chris Wright be the next person to leave the Trump Cabinet?. Arbitrage: 5.3% ROI, locks 5c per $1. Buy YES on PredictIt at 9c, buy NO on Kalshi / Robinhood at 86c.
Who will win the next French presidential election?, Gérald Darmanin. Arbitrage: 5.1% ROI, locks 5c per $1. Buy YES on Polymarket at 0c, buy NO on PredictIt at 95c.
Who will leave Trump's Cabinet next? Will Doug Collins be the next person to leave the Trump Cabinet?. Arbitrage: 4.2% ROI, locks 4c per $1. Buy YES on Kalshi / Robinhood at 3c, buy NO on PredictIt at 93c.
Who will win the 2028 Democratic presidential nomination?, Jon Ossoff. Arbitrage: 3.1% ROI, locks 3c per $1. Buy YES on Polymarket at 14c, buy NO on PredictIt at 83c.
Where will Putin and Zelenskyy next meet? Will Putin and Zelenskyy meet next in Ukraine?. Combined cost 99c (no lock right now). Buy YES on Polymarket at 3c, buy NO on Kalshi / Robinhood at 96c.
2028 Republican VP nominee Will Tulsi Gabbard be the nominee for the Vice Presidency for the Republican party?. Combined cost 99c (no lock right now). Buy YES on Kalshi / Robinhood at 2c, buy NO on PredictIt at 97c.

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: 8 Live Opportunities Identified Today

Track these live, or poll the free API