Arbitrage

Stablecoin arbitrage

How stablecoins like USDC and USDT drift from $1 and from each other across networks and exchanges, why these spreads appear, and how to scan for low-volatility stablecoin arbitrage.

6 min read

Stablecoins are designed to track $1, but "designed to" isn't "always exactly." Across the many networks and exchanges where USDC and USDT trade, their price wobbles by a few basis points — and those wobbles are some of the most accessible arbitrage opportunities in crypto.

Why stablecoins drift from $1

A stablecoin's peg is maintained by redemption and market-making, not by magic. When demand shifts faster than that machinery can respond, the price moves:

Heavy buying or selling concentrated on one exchange or chain.
Thin liquidity on a smaller network, where a single trade moves the price.
Bridge or redemption delays that stop the peg from snapping back instantly.
Risk-off events, when traders rush into or out of a particular stablecoin.

Two flavours of stablecoin spread

Same coin, different venue

USDC might be 0.9990 on one exchange and 1.0010 on another, or cheaper on Base than on Arbitrum. Buy the cheap side, sell the dear side.

USDC vs USDT

The two largest stablecoins are both "a dollar," but they trade at a small premium or discount to each other that shifts with sentiment. That basis is itself a spread you can scan for.

Why it suits cautious traders

Because a stablecoin barely moves in dollar terms, the price you saw when scanning is usually close to the price when you execute — so timing risk is low. The flip side is that spreads are small, so keep fees and your minimum spread tight.

Scanning stablecoins with WAGMI

USDC and USDT are built-in assets in the Spread scanner. Pick one, set a realistic amount (stablecoin trades are often sized in the thousands), and a tight minimum spread. WAGMI prices the coin across every selected network and all 14 centralised exchanges, then highlights the cheapest place to buy and the dearest place to sell. Add it to your watchlist to get emailed when a peg wobble opens a gap worth taking.

Key takeaways

Stablecoins aim for $1 but drift slightly across venues and networks.
USDC and USDT also trade at small premiums or discounts to each other.
Lower volatility means smaller spreads — but also lower risk while you transfer.
Scan USDC and USDT across networks and exchanges to spot the gaps.

FAQs

Why would a stablecoin not be worth exactly $1?+

Stablecoins hold their peg through supply, demand and redemption mechanics. Short-term imbalances — heavy selling on one chain, thin liquidity on another, or stress events — push the price a few basis points away from $1 until arbitrage and redemptions pull it back.

Is stablecoin arbitrage lower risk?+

Generally the price barely moves while you transfer between venues, so timing risk is lower than with volatile assets. The trade-off is smaller spreads, so fees matter even more. A genuine depeg event is the main tail risk to watch.

Ready to find your first spread?

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