# Arbitrage Alert: 8 Prediction Market Opportunities Live Now, Up to 58% ROI _Our cross-venue engine has surfaced 8 live prediction market arbitrage opportunities today, August 19, 2026, offering guaranteed returns._ **Published:** 2026-08-19 **Source:** https://www.startuphub.ai/ai-news/prediction-markets/2026/arbitrage-alert-8-prediction-market-opportunities-live-now-up-to-58-roi --- StartupHub.ai's proprietary cross-venue engine has detected 8 live prediction market arbitrage opportunities as of August 19, 2026. These opportunities involve the same real-world event being priced on two different platforms, such as Polymarket, Kalshi/Robinhood, or PredictIt, where buying a 'YES' on one venue and a 'NO' on the other costs less than $1 combined. An arbitrage lock occurs when you can simultaneously buy a 'YES' contract and a 'NO' contract for the same event across different markets for a total cost under $1, guaranteeing a profit regardless of the outcome. While these spreads offer guaranteed payouts, it is crucial to remember that prices can move rapidly, and fees, KYC requirements, and withdrawal limits can impact net returns. This information is for informational purposes only and is not financial advice. Arbitrage ROI by event. Will Trump recognize Somali...: ROI % 57.98. Where will Putin and Zelens...: ROI % 11.79. Who will leave Trump's Cabi...: ROI % 9.89. French presidential electio...: ROI % 7.35. 2028 Democratic VP nominee...: ROI % 6.72. Who will leave Trump's Cabi...: ROI % 5.26. Cross-venue spreads on August 19, 2026. Source: StartupHub.ai arbitrage engine. **Live arbitrage right now** These update automatically. Tap a leg to open the venue. Not financial advice. - **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. - **Where will Putin and Zelenskyy next meet? Will Putin and Zelenskyy meet next in Switzerland?**. Arbitrage: 11.8% ROI, locks 11c per $1. Buy YES on [Polymarket](https://polymarket.com/event/where-will-zelenskyy-and-putin-meet-next?via=startup-hub-ai) at 0c, buy NO on [Kalshi / Robinhood](https://kalshi.com/markets/kxputinzelenskyylocation) at 89c. - **Who will leave Trump's Cabinet next? Will Robert F. Kennedy Jr. be the next person to leave the Trump Cabinet?**. Arbitrage: 9.9% ROI, locks 9c per $1. Buy YES on [Kalshi / Robinhood](https://kalshi.com/markets/kxcabout) at 18c, buy NO on [Polymarket](https://polymarket.com/event/who-will-leave-trump-administration-before-2027?via=startup-hub-ai) at 73c. - **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 Gretchen Whitmer be the nominee for the Vice Presidency for the Democratic party?**. Arbitrage: 6.7% ROI, locks 6c per $1. Buy YES on [Kalshi / Robinhood](https://kalshi.com/markets/kxvpresnomd) at 10c, buy NO on [PredictIt](https://www.predictit.org/markets/detail/8799/Who-will-win-the-2028-Democratic-vice-presidential-nomination) at 84c. - **Who will leave Trump's Cabinet next? Will Chris Wright be the next person to leave the Trump Cabinet?**. Arbitrage: 5.3% ROI, locks 5c per $1. Buy YES on [PredictIt](https://www.predictit.org/markets/detail/8850/Who-will-be-the-next-Cabinet-member-to-leave-office) at 9c, buy NO on [Kalshi / Robinhood](https://kalshi.com/markets/kxcabout) at 86c. - **Who will win the next French presidential election?, Gérald Darmanin**. Arbitrage: 5.1% 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. - **Where will Putin and Zelenskyy next meet? Will Putin and Zelenskyy meet next in Ukraine?**. Arbitrage: 4.0% ROI, locks 4c per $1. Buy YES on [Polymarket](https://polymarket.com/event/where-will-zelenskyy-and-putin-meet-next?via=startup-hub-ai) at 0c, buy NO on [Kalshi / Robinhood](https://kalshi.com/markets/kxputinzelenskyylocation) at 96c. [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.