Prediction Market Arbitrage: 9 Opportunities Live Now, Up to 58% ROI

StartupHub.ai's proprietary cross-venue engine has surfaced nine live prediction market arbitrage opportunities as of August 17, 2026. These opportunities involve buying 'YES' on one platform and 'NO' on another for the same real-world event, with the combined cost falling below $1, thereby locking in a guaranteed profit.

An arbitrage lock occurs when the combined price of a 'YES' share on one market and a 'NO' share on another market for the identical event totals less than $1. This guarantees a payout, regardless of the outcome. Spreads can close rapidly, and potential returns may be impacted by fees, KYC requirements, and withdrawal limits. This information is for informational purposes only and is not financial advice.

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, 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 or open the live JSON endpoint.

Focused guides: Polymarket arbitrage, Kalshi arbitrage, and the arbitrage bot API.

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.