Lesson 8 — Pools and Swap Mechanisms

Liquidity pools and swap mechanisms are central to DeFi. Instead of using a traditional order book, many decentralized exchanges use automated market makers, or AMMs. Users trade against liquidity pools that are funded by liquidity providers.

This lesson explains how swaps work. When a user swaps one token for another, the trade changes the balance of assets inside the pool. The deeper the pool, the easier it is to execute larger trades with less price impact. The shallower the pool, the more slippage the user may experience.

Students learn why slippage settings matter. A high slippage tolerance may allow the trade to complete, but it can also expose the user to worse execution or front-running risk. A low slippage tolerance may protect the user but cause the transaction to fail if the price moves.

Liquidity providers earn fees, but they also accept risk. Impermanent loss can occur when token prices change relative to each other. Protocol risk and smart contract risk also remain.

The goal of this lesson is to help students understand what actually happens during a DeFi swap. A user who understands pools, slippage, and liquidity depth can make safer decisions.

1. Explain how a liquidity pool differs from an order book.
2. Research what slippage means in a DEX swap.
3. Write why shallow liquidity can be dangerous.
4. Explain one risk faced by liquidity providers.