Prediction Market Arbitrage: 7 Opportunities Live A…

StartupHub.ai's proprietary cross-venue engine has identified 7 live prediction market arbitrage opportunities as of August 1, 2026. These opportunities involve the same real-world event being priced on different prediction platforms, specifically Polymarket, Kalshi/Robinhood, and PredictIt.

An arbitrage lock occurs when buying a 'YES' contract on one venue and a 'NO' contract on another for the same event totals less than $1, guaranteeing a profit regardless of the outcome. While these spreads can close rapidly, our engine indicates these 7 are currently active.

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

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 VP nominee Will Josh Shapiro be the nominee for the Vice Presidency for the Democratic party?. Arbitrage: 5.3% ROI, locks 5c per $1. Buy YES on Kalshi / Robinhood at 4c, buy NO on PredictIt at 91c.
Who will be the Prime Minister of Israel after the 2026 election?, Yair Lapid. Arbitrage: 5.1% ROI, locks 5c per $1. Buy YES on Polymarket at 0c, buy NO on PredictIt at 95c.
Who will win the next French presidential election?, Gérald Darmanin. Arbitrage: 4.9% ROI, locks 5c per $1. Buy YES on Polymarket at 0c, buy NO on PredictIt at 95c.
Who will win the 2028 US presidential election?, Gavin Newsom. Arbitrage: 4.0% ROI, locks 4c per $1. Buy YES on Polymarket at 11c, buy NO on PredictIt at 85c.
2028 Democratic presidential nominee Will Mark Kelly be the Democratic Presidential nominee in 2028?. Arbitrage: 3.7% ROI, locks 4c per $1. Buy YES on Polymarket at 3c, buy NO on Kalshi / Robinhood at 94c.
Who will leave Trump's Cabinet next? Will Pete Hegseth be the next person to leave the Trump Cabinet?. Arbitrage: 3.1% ROI, locks 3c per $1. Buy YES on Kalshi / Robinhood at 14c, buy NO on Polymarket at 83c.

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 August 1, 2026

Track these live, or poll the free API