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Prediction Market Arbitrage: 8 Opportunities Live Now, Up to 60.9% ROI

Our cross-venue engine has identified 8 live prediction market arbitrage opportunities today, August 16, 2026, offering guaranteed payouts by betting on both sides of the same event.

4 min read
Live prediction market arbitrage board across Polymarket, Kalshi and PredictIt on August 16, 2026
Key Takeaways
  • 1
    8 prediction market arbitrage opportunities are currently live across Polymarket, Kalshi/Robinhood, and PredictIt.
  • 2
    The highest ROI opportunity offers a 60.9% return on a Trump-Somaliland recognition market.
  • 3
    Arbitrage involves buying YES on one venue and NO on another for under $1 total, guaranteeing a profit.
  • 4
    Spreads are dynamic and can close quickly; fees and platform limits affect net returns.

StartupHub.ai's proprietary cross-venue engine has surfaced 8 prediction market arbitrage opportunities as of August 16, 2026. These opportunities involve the same real-world event being priced on two different prediction market venues, such as Polymarket, Kalshi/Robinhood, or PredictIt, where buying a 'YES' contract on one venue and a 'NO' contract on the other costs less than $1 combined.

This price discrepancy allows for a guaranteed payout, as one of the contracts is certain to resolve to $1. While our engine detected these 8 opportunities live, spreads can move rapidly, and other opportunities may have opened and closed within the last few hours. It is important to remember that this information is not financial advice, and factors like fees, KYC requirements, and withdrawal limits can impact actual returns.

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.

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#prediction markets#arbitrage#polymarket#kalshi#predictit