A lot of beginners land on stablecoin pools with the same thought: finally, a yield that doesn't depend on a coin going up. That instinct is understandable — and partly right. But "stable" describes the asset's intended price, not the safety of the strategy.
Why Stablecoin Yields Appeal to Cautious Holders
Stablecoins are tokens designed to hold a fixed value, usually pegged 1:1 to the US dollar. When you stake them — lock them into a protocol to earn rewards — your headline number isn't constantly being eaten by price swings the way it might be with ETH or SOL. A 22.7% APY (Annual Percentage Yield, the compounded yearly return) on a stablecoin pool looks very different from a 22.7% APY on a volatile token, where a 30% price drop can wipe out months of earnings before breakfast.
That's the genuine appeal. The risks, though, are quieter and easier to miss.
Three Risks That Don't Show Up in the APY
Depegs happen when a stablecoin loses its 1:1 peg and trades below a dollar. It has happened before with large, well-known stablecoins — sometimes temporarily, sometimes permanently. If the coin you're earning yield on drops to $0.85, your "stable" position just lost 15% regardless of APY.
Smart-contract bugs are a risk on every DeFi protocol. A smart contract is simply the code that holds and moves your funds automatically. If that code has a flaw, an attacker can drain the pool. A TVL (Total Value Locked — the total amount of money sitting in a pool) of $7.28M, like the USDS pool on Yearn Finance on Ethereum, means the pool hasn't attracted the same volume of scrutiny as multi-billion-dollar protocols. That doesn't make it unsafe, but it does mean fewer eyes have tested it under pressure.
Unsustainable rewards are the third catch. A 22.7% APY on a dollar-pegged asset is high. Real lending demand rarely generates that alone — part of it is often token emissions, meaning the protocol is paying you in its own reward tokens to attract liquidity. Those emissions can slow or stop, and yields can fall fast.
Before committing any funds, check how a pool's yield is generated and how long it has held that rate. The comparison table lets you look across protocols side by side — which is a useful starting point for asking the right questions, not for finding a guaranteed winner.