Transaction Cost Impact on Arbitrage

Transaction costs are the friction points that impede the seamless convergence of asset prices across different exchanges or derivatives platforms. When a price discrepancy exists between two markets, arbitrageurs attempt to profit by buying low and selling high simultaneously.

However, if the costs associated with executing these trades ⎊ such as exchange fees, gas fees on blockchain networks, and the bid-ask spread ⎊ exceed the potential profit from the price difference, the arbitrage opportunity remains unexploited. In high-frequency cryptocurrency trading, even minor network congestion or slippage can turn a theoretical profit into a net loss.

This creates a band of inaction where prices can diverge without triggering corrective trading activity. Market microstructure dictates that these costs are not static and often increase during periods of high volatility.

Consequently, arbitrageurs must carefully model these expenses to determine the true viability of a trade. Without these costs, markets would theoretically reach perfect efficiency instantly.

In reality, transaction costs ensure that price gaps persist, acting as a natural buffer that limits the speed of price discovery.