Prediction Market Arbitrage: 6 Opportunities Live N…

StartupHub.ai's cross-venue engine has surfaced six live prediction market arbitrage opportunities as of August 28, 2026. These opportunities involve the same real-world event being priced on different prediction markets, allowing for a guaranteed payout by simultaneously buying 'YES' on one venue and 'NO' on another for a combined cost under $1.

An arbitrage lock occurs when the combined price of a 'YES' contract on one market and a 'NO' contract on another market for the same event totals less than $1. This allows a trader to buy both sides, guaranteeing a profit regardless of the outcome. It is important to note that spreads can close quickly, and fees, KYC requirements, and withdrawal limits can impact actual returns. This information is for informational 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: 292.2% ROI, locks 75c per $1. Buy YES on Polymarket at 14c, buy NO on PredictIt at 12c.
Will Trump recognize Somaliland? :: During Trump's term. Arbitrage: 57.6% ROI, locks 37c per $1. Buy YES on Polymarket at 9c, buy NO on Kalshi / Robinhood at 54c.
Where will Putin and Zelenskyy next meet? Will Putin and Zelenskyy meet next in Switzerland?. Arbitrage: 17.0% ROI, locks 15c per $1. Buy YES on Polymarket at 0c, buy NO on Kalshi / Robinhood at 85c.
Who will leave Trump's Cabinet next? Will Doug Collins be the next person to leave the Trump Cabinet?. Arbitrage: 7.5% ROI, locks 7c per $1. Buy YES on Kalshi / Robinhood at 3c, buy NO on PredictIt at 90c.
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.
Where will Putin and Zelenskyy next meet? Will Putin and Zelenskyy meet next in Ukraine?. Arbitrage: 3.1% ROI, locks 3c per $1. 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: 6 Opportunities Live Now, Up to 292% ROI

Track these live, or poll the free API