# Prediction Market Arbitrage: 8 Live Opportunities Surfaced August 13, 2026 _Our cross-venue engine has identified 8 live prediction market arbitrage opportunities as of August 13, 2026, offering guaranteed payouts._ **Published:** 2026-08-13 **Source:** https://www.startuphub.ai/ai-news/prediction-markets/2026/prediction-market-arbitrage-8-live-opportunities-surfaced-august-13-2026 --- For those new to the concept, a prediction market arbitrage lock occurs when you can buy 'YES' on one platform and 'NO' on another for the same real-world event, with the combined cost being less than $1. This strategy guarantees a payout regardless of the outcome, as one of your contracts will always resolve to $1. As of August 13, 2026, StartupHub.ai's cross-venue engine has surfaced 8 such opportunities across Polymarket, Kalshi/Robinhood, and PredictIt. These spreads can close rapidly, and potential profits may be affected by fees, KYC requirements, and withdrawal limits. This information is for informational purposes only and is not financial advice. Arbitrage ROI by event. Where will Putin and Zelens...: ROI % 471.43. Will Trump recognize Somali...: ROI % 60.51. Where will Putin and Zelens...: ROI % 8.7. French presidential electio...: ROI % 7.35. 2028 Democratic VP nominee...: ROI % 5.49. Who will win the next Frenc...: ROI % 4.99. Cross-venue spreads on August 13, 2026. Source: StartupHub.ai arbitrage engine. **Live arbitrage right now** These update automatically. Tap a leg to open the venue. Not financial advice. - **Where will Putin and Zelenskyy next meet? Will Putin and Zelenskyy meet next in Ukraine?**. Arbitrage: 471.4% ROI, locks 83c per $1. Buy YES on [Kalshi / Robinhood](https://kalshi.com/markets/kxputinzelenskyylocation) at 9c, buy NO on [Polymarket](https://polymarket.com/event/where-will-zelenskyy-and-putin-meet-next?via=startup-hub-ai) at 9c. - **Will Trump recognize Somaliland? :: During Trump's term**. Arbitrage: 60.5% ROI, locks 38c per $1. Buy YES on [Polymarket](https://polymarket.com/event/will-trump-recognize-somaliland-before-2027?via=startup-hub-ai) at 8c, buy NO on [Kalshi / Robinhood](https://kalshi.com/markets/kxrecogsomali) at 54c. - **Where will Putin and Zelenskyy next meet? Will Putin and Zelenskyy meet next in Switzerland?**. Arbitrage: 8.7% ROI, locks 8c per $1. Buy YES on [Polymarket](https://polymarket.com/event/where-will-zelenskyy-and-putin-meet-next?via=startup-hub-ai) at 3c, buy NO on [Kalshi / Robinhood](https://kalshi.com/markets/kxputinzelenskyylocation) 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](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: 5.5% 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 win the next French presidential election?, Gérald Darmanin**. Arbitrage: 5.0% 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: 3.9% ROI, locks 4c per $1. Buy YES on [Polymarket](https://polymarket.com/event/presidential-election-winner-2028?via=startup-hub-ai) at 9c, buy NO on [PredictIt](https://www.predictit.org/markets/detail/8171/Who-will-win-the-2028-US-presidential-election) at 87c. - **Who will be elected Los Angeles mayor in 2026?, Karen Bass**. Arbitrage: 3.6% ROI, locks 4c per $1. Buy YES on [PredictIt](https://www.predictit.org/markets/detail/8370/Who-will-be-elected-Los-Angeles-mayor-in-2026) at 62c, buy NO on [Polymarket](https://polymarket.com/event/los-angeles-mayoral-election-117?via=startup-hub-ai) at 35c. [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. © StartupHub.ai. All rights reserved. You may not republish this article in full without a license. Search engines and AI research tools may crawl and summarize for reference. Bulk reproduction or model training on this content requires a license. See https://www.startuphub.ai/terms.