Prediction Market Arbitrage: 10 Live Opportunities Identified Today, August 9, 2026

Our cross-venue engine has identified 10 live prediction market arbitrage opportunities today, August 9, 2026, offering guaranteed payouts for savvy traders.

Aug 9 at 1:02 PM3 min read

Live prediction market arbitrage board across Polymarket, Kalshi and PredictIt on August 9, 2026

For newcomers, a prediction market arbitrage lock occurs when buying a 'YES' contract on one venue and a 'NO' contract for the same real-world event on another venue costs less than $1 combined, guaranteeing a profit regardless of the outcome.

StartupHub.ai's proprietary cross-venue engine has surfaced 10 such live opportunities as of August 9, 2026. These spreads, spanning Polymarket, Kalshi/Robinhood, and PredictIt, offer varying returns by exploiting temporary pricing inefficiencies.

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: 61.7% 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.
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.
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 be elected Los Angeles mayor in 2026?, Karen Bass. Arbitrage: 4.7% ROI, locks 4c per $1. Buy YES on PredictIt at 62c, buy NO on Polymarket at 34c.
Where will Putin and Zelenskyy next meet? Will Putin and Zelenskyy meet next in Ukraine?. Arbitrage: 4.0% ROI, locks 4c per $1. Buy YES on Polymarket at 0c, buy NO on Kalshi / Robinhood at 96c.
Who will be elected Los Angeles mayor in 2026?, Nithya Raman. Arbitrage: 3.6% ROI, locks 3c per $1. Buy YES on Polymarket at 34c, buy NO on PredictIt at 63c.
2028 Democratic presidential nominee Will Mark Kelly be the Democratic Presidential nominee in 2028?. Arbitrage: 3.3% ROI, locks 3c per $1. Buy YES on Polymarket at 3c, buy NO on Kalshi / Robinhood at 94c.
Who will win the 2028 US presidential election?, Gavin Newsom. Arbitrage: 3.3% ROI, locks 3c per $1. Buy YES on Polymarket at 10c, buy NO on PredictIt at 87c.

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 markets #arbitrage #polymarket #kalshi #predictit