Prediction Market Arbitrage: 9 Live Opportunities o…

StartupHub.ai's proprietary cross-venue engine has identified 10 prediction market arbitrage opportunities as of July 31, 2026. These opportunities arise when the combined price of buying 'YES' on one platform and 'NO' on another for the same real-world event totals less than $1, guaranteeing a profit regardless of the outcome.

Nine of these spreads are live right now, offering immediate chances for arbitrage. The remaining opportunity was seen earlier today and may have already closed, highlighting the fast-moving nature of these markets.

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

Who will win the 2026 Minnesota Republican nomination for governor?, Mike Lindell. Arbitrage: 9.3% ROI, locks 8c per $1. Buy YES on PredictIt at 68c, buy NO on Polymarket at 24c.
2028 Democratic VP nominee Will Josh Shapiro be the nominee for the Vice Presidency for the Democratic party?. Arbitrage: 5.4% 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 2026 Minnesota Republican nomination for governor?, Lisa Demuth. Arbitrage: 4.2% ROI, locks 4c per $1. Buy YES on Polymarket at 24c, buy NO on PredictIt at 72c.
2028 Democratic presidential nominee Will Mark Kelly be the Democratic Presidential nominee in 2028?. Arbitrage: 4.0% ROI, locks 4c per $1. Buy YES on Polymarket at 3c, buy NO on Kalshi / Robinhood at 93c.
Who will be elected Greater Manchester mayor in 2026?, Bev Craig. Arbitrage: 4.0% ROI, locks 4c per $1. Buy YES on PredictIt at 96c, buy NO on Polymarket at 0c.
Who will win the 2028 US presidential election?, Gavin Newsom. Arbitrage: 3.9% ROI, locks 4c per $1. Buy YES on Polymarket at 11c, buy NO on PredictIt at 85c.
2028 Republican presidential nominee Will Ron DeSantis be the nominee for the Presidency for the Republican party?. Arbitrage: 3.8% ROI, locks 4c per $1. Buy YES on Polymarket at 2c, buy NO on Kalshi / Robinhood at 95c.
Who will win the 2028 Democratic presidential nomination?, Kamala Harris. Combined cost 97c (no lock right now). Buy YES on Polymarket at 8c, buy NO on PredictIt at 89c.

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: 9 Live Opportunities on July 31, 2026

Track these live, or poll the free API