# Prediction Market Arbitrage: Four Live Opportunities on July 23, 2026 (July 23, 2026)

_StartupHub.ai's engine has identified four prediction market arbitrage opportunities today, July 23, 2026, offering guaranteed payouts across major venues._

**Published:** 2026-07-23
**Source:** https://www.startuphub.ai/ai-news/prediction-markets/2026/prediction-market-arbitrage-four-live-opportunities-on-july-23-2026-july-23-2026

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Our cross-venue engine at StartupHub.ai has surfaced four live prediction market arbitrage opportunities as of July 23, 2026. These opportunities involve the same real-world event being priced on two different platforms-Polymarket, Kalshi/Robinhood, and PredictIt-where buying a 'YES' contract on one venue and a 'NO' contract on another totals less than $1. This locks in a guaranteed payout, regardless of the event's outcome.

While spreads can move quickly and opportunities may close fast, four specific arbitrage plays are currently active. Any other spreads that opened in the last few hours may have already closed. It is important to note that fees, KYC requirements, and withdrawal limits can impact actual returns.

Arbitrage ROI by event. Who will be the Prime Minis...: ROI % 53.85. Who will be the next Suprem...: ROI % 6.16. Who will win the 2028 US pr...: ROI % 3.57. Will Kamala Harris and Gavi...: ROI % 3.09. Cross-venue spreads on July 23, 2026. Source: StartupHub.ai arbitrage engine.

**Live arbitrage right now** These update automatically. Tap a leg to open the venue. Not financial advice.

- **Who will be the Prime Minister of Israel after the 2026 election?, Benjamin Netanyahu**. Arbitrage: 53.8% ROI, locks 35c per $1. Buy YES on [Kalshi / Robinhood](https://kalshi.com/markets/kxnextisraelpm) at 7c, buy NO on [PredictIt](https://www.predictit.org/markets/detail/8643/Who-will-be-the-Prime-Minister-of-Israel-after-the-2026-election) at 58c.
- **Who will be the next Supreme Court justice? Will Emil Bove become the next Justice on the Supreme Court?**. Arbitrage: 6.2% 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: 3.6% ROI, locks 3c per $1. Buy YES on [Polymarket](https://polymarket.com/event/will-gavin-newsom-win-the-2028-us-presidential-election) at 13c, 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).

*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.*

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Original analysis from [startuphub.ai](https://www.startuphub.ai), the #1 AI startup directory.

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