# Prediction Market Arbitrage: 5 Live Opportunities on AOC, Netanyahu, and More _Our cross-venue engine has identified 5 live prediction market arbitrage opportunities as of July 28, 2026, allowing for guaranteed payouts._ **Published:** 2026-07-28 **Source:** https://www.startuphub.ai/ai-news/prediction-markets/2026/prediction-market-arbitrage-5-live-opportunities-on-aoc-netanyahu-and-more --- For those new to the concept, an arbitrage lock in prediction markets occurs when buying a 'YES' share on one platform and a 'NO' share on another for the same event totals less than $1, guaranteeing a profit regardless of the outcome. These spreads are dynamic and can close rapidly, so immediate action is often required to capitalize on them. Potential profits can also be impacted by platform fees, Know Your Customer (KYC) requirements, and withdrawal limits. As of July 28, 2026, StartupHub.ai's cross-venue engine has identified five such arbitrage opportunities across Polymarket, Kalshi/Robinhood, and PredictIt. These opportunities allow for a guaranteed payout, with the most attractive spreads offering significant returns on investment. Arbitrage ROI by event. Will Alexandria Ocasio-Cort...: ROI % 26.34. Who will be the Prime Minis...: ROI % 19.05. Who will be the next Suprem...: ROI % 6.61. Who will win the 2028 US pr...: ROI % 4.44. Will Kamala Harris and Gavi...: ROI % 3.09. Cross-venue spreads on July 28, 2026. Source: StartupHub.ai arbitrage engine. **Live arbitrage right now** These update automatically. Tap a leg to open the venue. Not financial advice. - **Will Alexandria Ocasio-Cortez win the 2028 Democratic presidential nomination?**. Arbitrage: 26.3% ROI, locks 21c per $1. Buy YES on [Polymarket](https://polymarket.com/event/democratic-presidential-nominee-2028?via=startup-hub-ai) at 13c, buy NO on [Kalshi / Robinhood](https://kalshi.com/markets/kxaocsenate) at 66c. - **Who will be the Prime Minister of Israel after the 2026 election?, Benjamin Netanyahu**. Arbitrage: 19.0% ROI, locks 16c per $1. Buy YES on [Kalshi / Robinhood](https://kalshi.com/markets/kxnextisraelpm) at 15c, buy NO on [PredictIt](https://www.predictit.org/markets/detail/8643/Who-will-be-the-Prime-Minister-of-Israel-after-the-2026-election) at 69c. - **Who will be the next Supreme Court justice? Will Emil Bove become the next Justice on the Supreme Court?**. Arbitrage: 6.6% ROI, locks 6c per $1. Buy YES on [Kalshi / Robinhood](https://kalshi.com/markets/kxscourt) at 5c, buy NO on [PredictIt](https://www.predictit.org/markets/detail/8246/Who-will-be-the-next-Supreme-Court-nominee) at 89c. - **Who will win the 2028 US presidential election?, Gavin Newsom**. Arbitrage: 4.4% ROI, locks 4c per $1. Buy YES on [Polymarket](https://polymarket.com/event/presidential-election-winner-2028?via=startup-hub-ai) at 12c, buy NO on [PredictIt](https://www.predictit.org/markets/detail/8171/Who-will-win-the-2028-US-presidential-election) at 84c. - **Will Kamala Harris and Gavin Newsom be the two frontrunners for the 2028 Democratic Presidential Nomination?**. Arbitrage: 3.1% ROI, locks 3c per $1. Buy YES on [Kalshi / Robinhood](https://kalshi.com/markets/kxpresnomd) at 18c, buy NO on [PredictIt](https://www.predictit.org/markets/detail/8153/Who-will-win-the-2028-Democratic-presidential-nomination) at 79c. [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.