Prediction Market Arbitrage: 8 Live Opportunities Surfaced by Start…

Our StartupHub.ai engine has identified 9 prediction market arbitrage opportunities as of August 15, 2026. These opportunities arise when the same real-world event is priced differently across venues like Polymarket, Kalshi/Robinhood, and PredictIt, allowing for a risk-free profit.

An arbitrage lock occurs when buying a 'YES' contract on one venue and a 'NO' contract for the identical event on another venue costs less than $1 combined, guaranteeing a payout regardless of the outcome. Eight of these spreads are live right now, though spreads can close fast, and fees, KYC requirements, and withdrawal limits can impact net 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.

Will Trump recognize Somaliland? :: During Trump's term. Arbitrage: 60.9% ROI, locks 38c per $1. Buy YES on Polymarket at 8c, buy NO on Kalshi / Robinhood at 54c.
Who will leave Trump's Cabinet next? Will Pete Hegseth be the next person to leave the Trump Cabinet?. Arbitrage: 12.4% ROI, locks 11c per $1. Buy YES on Kalshi / Robinhood at 14c, buy NO on Polymarket at 75c.
Where will Putin and Zelenskyy next meet? Will Putin and Zelenskyy meet next in Switzerland?. Arbitrage: 9.2% ROI, locks 8c per $1. Buy YES on Polymarket at 3c, buy NO on Kalshi / Robinhood at 89c.
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: 5.0% ROI, locks 5c per $1. Buy YES on Polymarket at 0c, buy NO on PredictIt at 95c.
2028 Democratic VP nominee Will Josh Shapiro be the nominee for the Vice Presidency for the Democratic party?. Arbitrage: 4.3% ROI, locks 4c per $1. Buy YES on Kalshi / Robinhood at 4c, buy NO on PredictIt at 92c.
Where will Putin and Zelenskyy next meet? Will Putin and Zelenskyy meet next in Ukraine?. Arbitrage: 3.5% ROI, locks 3c per $1. Buy YES on Polymarket at 1c, buy NO on Kalshi / Robinhood at 96c.
Who will leave Trump's Cabinet next? Will Linda McMahon be the next person to leave the Trump Cabinet?. Arbitrage: 3.1% ROI, locks 3c per $1. Buy YES on Kalshi / Robinhood at 2c, buy NO on PredictIt at 95c.
2028 Republican presidential nominee Will Ron DeSantis be the nominee for the Presidency for the Republican party?. Combined cost 98c (no lock right now). Buy YES on Polymarket at 3c, buy NO on Kalshi / Robinhood at 95c.

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: 8 Live Opportunities Surfaced by StartupHub.ai Engine

Track these live, or poll the free API