Arbitrage
Profit from price gaps across markets or pools.
Arbitrage is a trading strategy that seeks to profit from a price difference for the same or closely related asset across markets. A trader buys at the lower effective price and sells at the higher one. Successful arbitrage depends on executing both sides quickly enough and earning more than all fees, slippage, financing costs, and operational losses.
Crypto markets create many possible price gaps because assets trade around the clock across centralized exchanges, decentralized exchanges, chains, and liquidity pools. A token might cost $100 on one venue and $101 on another. That one-dollar spread is not automatically profit. Trading fees, withdrawal charges, gas, price impact, transfer delays, and taxes may make the complete trade unprofitable.
Decentralized exchange arbitrage often happens within one blockchain transaction. A searcher buys from an AMM whose pool price is low and sells into another pool where it is high. Smart contract logic can require the transaction to revert unless the final balance meets a minimum profit. Flash loans can supply temporary capital and must be repaid in the same atomic transaction. Even reverted attempts normally consume gas.
Arbitrage matters because it supports price discovery and keeps fragmented markets aligned. When traders buy an underpriced asset, they raise its local price; when they sell an overpriced one, they lower it. This activity helps AMMs track broader market prices. It may also compete with ordinary transactions for block space and contribute to maximal extractable value, or MEV.
Other forms include triangular arbitrage among three trading pairs, funding-rate arbitrage between spot and perpetual markets, and cross-chain arbitrage. These are not risk-free. A supposedly hedged funding trade can face liquidation, changing rates, basis moves, and exchange failure. Cross-chain strategies add bridge, finality, and inventory risk. Centralized venues can delay withdrawals or fill only one leg.
Professional execution requires real-time market data, precise fee models, reliable infrastructure, position limits, and continuous monitoring. Backtests should include latency, failed transactions, changing liquidity, and competition rather than ideal quotes. Smart contracts need audits and strict token handling. For most individuals, manually chasing a visible gap is dangerous because automated traders likely detected it first. Arbitrage can reduce market differences, but that same competition makes reliable profits thin and short-lived.
Frequently asked questions
- Prices update at different speeds because trading venues have separate liquidity, participants, fees, and information. Arbitrageurs buy where an asset is cheaper and sell where it is more expensive, which tends to bring prices closer together. A visible spread is not necessarily profit because transfer time, gas, slippage, trading fees, and failed execution can consume it.
- No. Arbitrage can use the trader's own inventory on multiple venues, borrowed capital, or a flash loan. Flash loans provide uncollateralized liquidity only when borrowing and repayment occur atomically in one blockchain transaction. They reduce upfront capital needs but add fees, smart contract complexity, and competition. A transaction that cannot repay normally reverts while still costing gas.
- The quoted gap may disappear before execution, one side may fill without the other, or price impact and fees may erase the margin. Crypto traders also face smart contract bugs, bridge delays, exchange withdrawal limits, MEV competition, and reverted transactions. Model every cost, use strict profit checks, limit exposure, monitor systems, and never assume a historical strategy will remain profitable.