Choosing a stablecoin for arbitrage settlements requires weighing liquidity, peg stability, settlement finality, and counterparty risk against operational constraints like on-chain gas costs and off-ramp speed. Arbitrage is time-sensitive: a coin with deep order books and tight bid-ask spreads reduces execution slippage, while transparent reserves and reliable redemption mechanisms reduce the risk that funds become illiquid during settlement. Jurisdictional regulation and local market practice also shape which token is practical in a given geography.
Practical candidate stablecoins
USDC is frequently recommended where regulatory clarity and transparency matter. Jeremy Allaire, Circle, has emphasized Circle’s reserve policy and public attestations that aim to back USDC with cash and short-term U.S. Treasury instruments. That backing and clear corporate governance make USDC attractive for institutional counterparties and venues that require predictable redemption behavior. In many on-chain venues USDC’s wide exchange listing supports tight spreads, which is beneficial for arbitrage execution.
USDT remains the most broadly traded stablecoin on many spot and derivatives venues, and its liquidity profile often yields the smallest execution costs for high-frequency arbitrage. Paolo Ardoino, Tether, manages a system that many traders rely on because USDT pairs exist on virtually all major exchanges. That ubiquity helps arbitrageurs connect fragmented markets quickly, but traders should account for historical concerns over reserve transparency and occasional market perceptions that can widen spreads in stressed conditions.
DAI offers a different trade-off: as a crypto-collateralized stablecoin governed by MakerDAO, DAI provides decentralized redemption and collateral mechanisms rather than centralized issuer redemption. Rune Christensen, MakerDAO, has overseen a model where overcollateralization and algorithmic governance aim to sustain the peg without single-entity reserve control. For arbitrage that occurs entirely on-chain between decentralized exchanges, DAI’s composability and permissionless minting/redemption can reduce counterparty friction. However, DAI can depeg when crypto volatility changes collateral values, and that risk matters during liquidity shocks.
Other tokens such as FRAX or jurisdiction-specific coins can be useful in niche flows, while regulated fiat-backed offerings may be constrained by regional rules. Cecilia Skingsley, Bank for International Settlements, has warned that large stablecoins can pose systemic risks, underscoring the importance of assessing legal and supervisory environments before relying on any single instrument for settlement.
Recommendations for arbitrage use
For cross-exchange arbitrage where execution speed and minimal slippage are paramount, many professional traders prefer USDT for primary execution and USDC for custody and final settlement, swapping as needed to manage counterparty exposure. When counterparty governance and auditability matter to counterparties or compliance teams, favor USDC. For fully on-chain arbitrage strategies within decentralized finance, consider DAI or other decentralized stablecoins for their composability and permissionless access. Always verify available redemption rails, monitor reserve disclosures from issuers, and maintain multi-rail settlement plans to avoid being unable to convert holdings to needed fiat or on-chain assets during market stress. Local market conventions and regulatory developments can change practical best choices quickly; ongoing monitoring is essential.