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Stable Pool Invariant

Definition

A Stable Pool Invariant is a mathematical property that remains constant within a stablecoin liquidity pool, despite trades or other operations. In decentralized finance, particularly for automated market makers (AMMs) dealing with stablecoins, this invariant ensures that the total value or a specific mathematical relationship between the assets in the pool is maintained. It allows for predictable exchange rates and minimal slippage for assets that are pegged to a stable value. This mathematical construct is fundamental to the reliable functioning of stablecoin swaps and lending protocols.