Traditional AMMs like Uniswap's CPMM weren't built for outcome tokens. Here's why that's a problem.
CPMM provides poor liquidity at extreme probabilities (near 0% or 100%), exactly when prediction markets need it most.
Loss-vs-rebalancing (LVR) spikes dramatically as expiration approaches and at edge prices, punishing liquidity providers unpredictably.
Outcome token volatility depends on both price AND time remaining. Traditional AMMs ignore this critical factor.
•pm-AMM uses mathematical optimization to ensure consistent LVR across all prices and times
Every feature designed with mathematical precision and real-world usability
Consistent losses for LPs regardless of price, making risk predictable and manageable
Concentrated around 50% probability where most trading happens, reducing slippage
Dynamic variant adjusts liquidity over time to maintain constant expected LVR
Efficient approximations for normal distribution functions minimize computation costs
Track LVR, pool value, trading volume, and compare performance vs alternatives
Mathematical optimization ensures liquidity providers get fair, predictable returns
Join liquidity providers and traders already benefiting from mathematically optimal market making
The mathematical foundation behind optimal prediction market making
Gaussian Score Dynamics
We model the prediction market as a bet on whether an underlying Brownian motion (random walk) ends above zero at expiration time T.
The score process Z follows a random walk with volatility σ. Think: basketball score differential, vote margin, or price movements.
Brownian motion (random walk) representing the score differential
Compare our approach with traditional AMMs and see the mathematical advantage

Uniform LVR across all prices
Optimal loss distribution
Consistent loss rate
Time-aware (dynamic variant)
The pm-AMM achieves uniform Loss-vs-Rebalancing (LVR) across all prices, meaning the rate of loss to arbitrageurs is proportional to pool value regardless of current probability. This creates optimal risk distribution for prediction markets.