Prediction Market Arbitrage: 7 Opportunities Surfac…

StartupHub.ai's cross-venue engine has once again identified profitable arbitrage opportunities across leading prediction markets. On August 27, 2026, our system surfaced 7 instances where the same real-world event was priced differently enough on two venues, allowing for a risk-free profit.

An arbitrage lock occurs when buying a 'YES' contract on one market and a 'NO' contract on another for the same event costs less than $1 combined, guaranteeing a payout of $1 regardless of the outcome. While 5 of these opportunities are live right now, spreads can close fast, and factors like fees, KYC requirements, and withdrawal limits can impact actual returns. This information is for educational purposes only and is not financial advice.

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

Which party will win the 2026 US Senate election in South Carolina? for Republican. Arbitrage: 239.0% ROI, locks 71c per $1. Buy YES on Polymarket at 14c, buy NO on PredictIt at 15c.
Will Trump recognize Somaliland? :: During Trump's term. Arbitrage: 47.7% ROI, locks 32c per $1. Buy YES on Polymarket at 10c, buy NO on Kalshi / Robinhood at 58c.
Who will leave Trump's Cabinet next? Will Pete Hegseth be the next person to leave the Trump Cabinet?. Arbitrage: 8.1% ROI, locks 7c per $1. Buy YES on Kalshi / Robinhood at 15c, buy NO on Polymarket at 78c.
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.
2028 Democratic presidential nominee Will Gavin Newsom be the Democratic Presidential nominee in 2028?. Arbitrage: 3.1% ROI, locks 3c per $1. Buy YES on Kalshi / Robinhood at 13c, buy NO on PredictIt at 84c.
Who will leave Trump's Cabinet next? Will Doug Collins be the next person to leave the Trump Cabinet?. Combined cost 93c (no lock right now). Buy YES on Kalshi / Robinhood at 3c, buy NO on PredictIt at 90c.
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: 7 Opportunities Surfaced, 5 Live Now

Track these live, or poll the free API