Profit in Polymarket arbitrage does not come from price gaps alone.
It comes from incorrect probability attribution across markets.
Where Arbitrage Opportunities Exist
- implied probability does not match real-world probability
- correlated markets diverge on identical outcomes
- liquidity causes temporary mispricing
arbitrage exists when probability representation is inconsistent
Profit Sources
1. Mispriced Probability
- market implies 35%
- real estimate is 55%
- correction creates upside capture
2. Cross-Market Divergence
- Market A: 60%
- Market B: 48%
- same underlying event
3. Time Convergence
- uncertainty decays toward resolution
- probability moves toward 0 or 1
- early entry captures convergence drift
Execution Flow
- detect mispricing signal
- validate probability discrepancy
- enter YES/NO position
- wait for repricing or convergence
- exit or settle at resolution
Example Trade Structure
- market price: 0.42
- estimated probability: 0.65
- position: YES shares
If repricing occurs:
- new price: 0.60
- profit captured via spread expansion
Hidden Execution Constraints
Profitability is constrained by execution reality:
- liquidity depth limits fill quality
- fees reduce net edge
- slippage erodes theoretical spread
- resolution rules introduce uncertainty
- false signals cause misallocation
Why Most Traders Fail
Failure is not signal-based.
It is execution-based.
- overtrading micro-signals
- ignoring liquidity fragmentation
- misreading temporary noise as edge
- poor timing under intraday pressure
System Behavior Insight
Arbitrage is not a static opportunity type.
It is a continuous adjustment process across probability networks.
Intraday → Arbitrage → MEV Spine
Where probability moves in real time under news and liquidity pressure.
Execution Systems LayerHow arbitrage is executed under latency and fragmentation constraints.
MEV Execution LayerWhere ordering competition and execution priority determine final profitability.
Final Insight
Profit does not come from arbitrage existence.
It comes from capturing probability mispricing before convergence absorbs it.