# Prediction Market Arbitrage: 9 Opportunities Live Now, Up to 506% ROI _Our cross-venue engine has identified 9 live prediction market arbitrage opportunities as of August 14, 2026, offering guaranteed payouts by simultaneously buying YES on one venue and NO on another for under $1._ **Published:** 2026-08-14 **Source:** https://www.startuphub.ai/ai-news/prediction-markets/2026/prediction-market-arbitrage-9-opportunities-live-now-up-to-506-roi --- For those new to prediction markets, an arbitrage lock occurs when you can buy a 'YES' contract on one platform and a 'NO' contract for the same real-world event on another platform, with the combined cost being less than $1. This strategy guarantees a payout of $1 regardless of the outcome, locking in a profit. As of August 14, 2026, StartupHub.ai's cross-venue engine has surfaced 9 such arbitrage opportunities across Polymarket, Kalshi/Robinhood, and PredictIt. These spreads move quickly and can close at any moment, and potential profits can be impacted by fees, KYC requirements, and withdrawal limits. Arbitrage ROI by event. Where will Putin and Zelens...: ROI % 506.06. Will Trump recognize Somali...: ROI % 57.98. Who will leave Trump's Cabi...: ROI % 17.65. Who will leave Trump's Cabi...: ROI % 14.29. Where will Putin and Zelens...: ROI % 9.11. French presidential electio...: ROI % 7.35. Cross-venue spreads on August 14, 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: 506.1% ROI, locks 84c 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 8c. - **Will Trump recognize Somaliland? :: During Trump's term**. Arbitrage: 58.0% ROI, locks 37c 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 55c. - **Who will leave Trump's Cabinet next? Will Robert F. Kennedy Jr. be the next person to leave the Trump Cabinet?**. Arbitrage: 17.6% ROI, locks 15c per $1. Buy YES on [Kalshi / Robinhood](https://kalshi.com/markets/kxcabout) at 16c, buy NO on [Polymarket](https://polymarket.com/event/who-will-leave-trump-administration-before-2027?via=startup-hub-ai) at 69c. - **Who will leave Trump's Cabinet next? Will Pete Hegseth be the next person to leave the Trump Cabinet?**. Arbitrage: 14.3% ROI, locks 13c per $1. Buy YES on [Kalshi / Robinhood](https://kalshi.com/markets/kxcabout) at 13c, buy NO on [Polymarket](https://polymarket.com/event/who-will-leave-trump-administration-before-2027?via=startup-hub-ai) at 75c. - **Where will Putin and Zelenskyy next meet? Will Putin and Zelenskyy meet next in Switzerland?**. Arbitrage: 9.1% 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: 5.4% 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 leave Trump's Cabinet next? Will Doug Collins 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 2c, buy NO on [PredictIt](https://www.predictit.org/markets/detail/8850/Who-will-be-the-next-Cabinet-member-to-leave-office) at 95c. [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.