Slippage
Web3 / defi
Slippage is the difference between the expected execution price and the actual price at which a trade settles on a decentralized exchange, caused by price movements during transaction confirmation and the mechanics of liquidity pools. When a large trade executes against an AMM pool, it moves the price according to the bonding curve, meaning traders later in the transaction ordering pay worse prices than those earlier. Slippage increases with trade size relative to pool liquidity and with network congestion that creates delays between transaction submission and execution. Users typically set maximum acceptable slippage tolerances to protect against extreme price movements, though setting it too low can cause transactions to fail entirely if the market moves unfavorably during confirmation. Example: A trader attempting to swap 100 ETH for USDC on Uniswap V3 might expect 150,000 USDC based on current prices, but due to the trade size relative to liquidity and potential block delays, they might receive only 145,500 USDC—a 3% slippage. If they set a 2% slippage tolerance, their transaction would fail rather than execute at an unfavorable rate. Why it matters for DeFi: Slippage directly impacts trading costs and profitability for traders, making it essential to understand when using decentralized exchanges. Minimizing slippage through proper liquidity pool selection, trade sizing, and timing is crucial for competitive trading strategies and institutional adoption.
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