# Prediction Market Arbitrage: 7 Opportunities Live August 1, 2026 _Our cross-venue engine detected 7 live prediction market arbitrage opportunities today, August 1, 2026, offering guaranteed returns by buying YES on one venue and NO on another for under $1._ **Published:** 2026-08-01 **Source:** https://www.startuphub.ai/ai-news/prediction-markets/2026/prediction-market-arbitrage-7-opportunities-live-august-1-2026 --- 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. Arbitrage ROI by event. French presidential electio...: ROI % 7.35. 2028 Democratic VP nominee...: ROI % 5.26. Who will be the Prime Minis...: ROI % 5.1. Who will win the next Frenc...: ROI % 4.88. Who will win the 2028 US pr...: ROI % 4. 2028 Democratic presidentia...: ROI % 3.68. Cross-venue spreads on August 1, 2026. Source: StartupHub.ai arbitrage engine. **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](https://polymarket.com/event/next-french-presidential-election?via=startup-hub-ai) at 0c, buy NO on [Kalshi / Robinhood](https://kalshi.com/markets/kxfrpresadvance) 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](https://kalshi.com/markets/kxvpresnomd) at 4c, buy NO on [PredictIt](https://www.predictit.org/markets/detail/8799/Who-will-win-the-2028-Democratic-vice-presidential-nomination) 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](https://polymarket.com/event/who-will-be-the-next-prime-minister-of-israel-after-the-next-election?via=startup-hub-ai) at 0c, buy NO on [PredictIt](https://www.predictit.org/markets/detail/8643/Who-will-be-the-Prime-Minister-of-Israel-after-the-2026-election) at 95c. - **Who will win the next French presidential election?, Gérald Darmanin**. Arbitrage: 4.9% ROI, locks 5c per $1. Buy YES on [Polymarket](https://polymarket.com/event/next-french-presidential-election?via=startup-hub-ai) at 0c, buy NO on [PredictIt](https://www.predictit.org/markets/detail/8766/Who-will-win-the-next-French-presidential-election) at 95c. - **Who will win the 2028 US presidential election?, Gavin Newsom**. Arbitrage: 4.0% ROI, locks 4c per $1. Buy YES on [Polymarket](https://polymarket.com/event/presidential-election-winner-2028?via=startup-hub-ai) at 11c, buy NO on [PredictIt](https://www.predictit.org/markets/detail/8171/Who-will-win-the-2028-US-presidential-election) 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](https://polymarket.com/event/democratic-presidential-nominee-2028?via=startup-hub-ai) at 3c, buy NO on [Kalshi / Robinhood](https://kalshi.com/markets/kxpresnomd) 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](https://kalshi.com/markets/kxcabout) at 14c, buy NO on [Polymarket](https://polymarket.com/event/who-will-leave-trump-administration-before-2027?via=startup-hub-ai) at 83c. [See the full live arbitrage board](https://www.startuphub.ai/arbitrage) or poll the free [JSON API](https://www.startuphub.ai/api/v1/arbitrage). ## 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](https://www.startuphub.ai/arbitrage), 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](https://www.startuphub.ai/api-docs/reference/arbitrage) or open the [live JSON endpoint](https://www.startuphub.ai/api/v1/arbitrage). Focused guides: [Polymarket arbitrage](https://www.startuphub.ai/arbitrage/polymarket), [Kalshi arbitrage](https://www.startuphub.ai/arbitrage/kalshi), and the [arbitrage bot API](https://www.startuphub.ai/arbitrage/bot). *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.* --- Original analysis from [startuphub.ai](https://www.startuphub.ai), the #1 AI startup directory.