Prediction Market Arbitrage: 7 Opportunities Live T…

Our cross-venue engine has surfaced 7 prediction market arbitrage opportunities live right now, as of August 25, 2026. An arbitrage lock occurs when buying 'YES' on one market and 'NO' on another for the same real-world event costs less than $1, guaranteeing a payout regardless of the outcome. While these opportunities offer a theoretical guaranteed profit, spreads can close very quickly, and fees, KYC requirements, and withdrawal limits on different platforms will impact actual returns. This information is for educational purposes only and is not financial advice.

These opportunities span Polymarket, Kalshi/Robinhood, and PredictIt, with potential ROIs ranging from 3.1% to over 50%. Any other spreads that opened in the last few hours may have already closed due to rapid market adjustments. We present the most interesting live opportunities below, noting that these are highly time-sensitive.

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: 51.1% ROI, locks 34c per $1. Buy YES on Polymarket at 8c, buy NO on Kalshi / Robinhood at 58c.
Where will Putin and Zelenskyy next meet? Will Putin and Zelenskyy meet next in Switzerland?. Arbitrage: 20.1% ROI, locks 17c per $1. Buy YES on Polymarket at 0c, buy NO on Kalshi / Robinhood at 83c.
Who will leave Trump's Cabinet next? Will Pete Hegseth be the next person to leave the Trump Cabinet?. Arbitrage: 11.7% ROI, locks 10c per $1. Buy YES on Kalshi / Robinhood at 14c, buy NO on Polymarket at 76c.
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 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 win the 2028 Democratic presidential nomination?, Jon Ossoff. Arbitrage: 4.4% ROI, locks 4c per $1. Buy YES on Polymarket at 15c, buy NO on PredictIt at 81c.
Who will be the next Supreme Court justice? Will Aileen Cannon become the next Justice on the Supreme Court?. Arbitrage: 3.1% ROI, locks 3c per $1. Buy YES on PredictIt at 7c, buy NO on Kalshi / Robinhood at 90c.

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 Live Today, August 25, 2026

Track these live, or poll the free API