Prediction Market Arbitrage: 9 Live Opportunities Surfaced by Start…

Our proprietary StartupHub.ai engine, designed to scour the prediction market landscape, has once again delivered. As of August 11, 2026, it surfaced 10 distinct arbitrage opportunities across Polymarket, Kalshi/Robinhood, and PredictIt. These opportunities arise when the combined price of a 'YES' share on one platform and a 'NO' share for the same real-world event on another platform totals less than $1, guaranteeing a profit.

Nine of these spreads are currently live, offering immediate potential for a locked-in payout. One additional opportunity was observed within the last few hours but may have already closed, highlighting 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 informational 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: 60.8% ROI, locks 38c per $1. Buy YES on Polymarket at 8c, buy NO on Kalshi / Robinhood at 54c.
Where will Putin and Zelenskyy next meet? Will Putin and Zelenskyy meet next in Switzerland?. Arbitrage: 16.2% ROI, locks 14c per $1. Buy YES on Polymarket at 3c, buy NO on Kalshi / Robinhood at 83c.
Will Rubio and Vance both announce a run for President before 2028?. Arbitrage: 12.4% ROI, locks 11c per $1. Buy YES on Kalshi / Robinhood at 34c, buy NO on PredictIt at 55c.
Who will leave Trump's Cabinet next? Will Pete Hegseth be the next person to leave the Trump Cabinet?. Arbitrage: 8.7% ROI, locks 8c per $1. Buy YES on Kalshi / Robinhood at 13c, buy NO on Polymarket at 79c.
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: 6.4% ROI, locks 6c per $1. Buy YES on PredictIt at 9c, buy NO on Kalshi / Robinhood at 85c.
2028 Democratic VP nominee Will Josh Shapiro be the nominee for the Vice Presidency for the Democratic party?. Arbitrage: 5.5% ROI, locks 5c per $1. Buy YES on Kalshi / Robinhood at 4c, buy NO on PredictIt at 91c.
Who will win the next French presidential election?, Gérald Darmanin. Arbitrage: 5.0% ROI, locks 5c per $1. Buy YES on Polymarket at 0c, buy NO on PredictIt at 95c.
Who will win the 2028 US presidential election?, Gavin Newsom. Arbitrage: 3.5% ROI, locks 3c per $1. Buy YES on Polymarket at 10c, buy NO on PredictIt at 87c.
Where will Putin and Zelenskyy next meet? Will Putin and Zelenskyy meet next in Ukraine?. Combined cost 97c (no lock right now). Buy YES on Polymarket at 1c, buy NO on Kalshi / Robinhood at 96c.

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: 9 Live Opportunities Surfaced by StartupHub.ai Engine

Track these live, or poll the free API