Strategy Guide

Cross-Venue Spread

Structural · Kalshi + Polymarket · Medium risk

What does it do?

Compare Kalshi and Polymarket quotes for the same event. Buy the cheaper YES on one platform while buying the cheaper NO on the other; allowed only when resolution rules, time windows and underlying reference all match strictly.

Why might it work?

Different participants, liquidity, fee structures and information speeds on the two exchanges can briefly imply different probabilities for the same event.

Simplified example

Kalshi YES62¢

Polymarket NO33¢

Combo cost95¢

Pre-fee spread5¢

Strategy structure

Venue Abuy the cheap YES

Venue Bbuy the cheap NO

Triggerall-in cost of both legs + buffer < $1

Match requirementHard match: identical underlying / time / rules

Main risks

Rule riskExecution riskFunding risk

The biggest danger is 'looks like the same event, resolves differently'. Also manage one leg filling while the other doesn't, under-funded accounts, fees and deposit/withdrawal delays.

Active signals

No open signals — the engine rescans every 60 seconds and surfaces opportunities automatically.

Model opinions, historical returns and community scores are no guarantee of results. Before trading, consider fees, liquidity, resolution rules, jurisdiction and your own risk tolerance.