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Where Staking Yield Actually Comes From
"Earn 4% on your ETH" sounds like a savings account. It isn't. Staking yield is compensation for providing a service — securing a proof-of-stake network — and understanding exactly where the money comes from is the difference between earning yield and being the yield.
The three real sources
- Protocol issuance. The network mints new tokens to pay validators, exactly as bitcoin pays miners. Note the reflexivity: issuance dilutes all holders, so part of your "yield" is simply your protection from a dilution non-stakers absorb in full. On Ethereum, issuance also scales with total stake — as more ETH stakes, the per-validator rate falls, which is why staking yields have drifted down as participation rose.
- Transaction fees. Users pay to have transactions included; validators who propose blocks collect (part of) those fees. This is real economic revenue from network demand — the healthiest component, since it doesn't dilute anyone.
- MEV. Ordering transactions has value — arbitrage and liquidations pay for priority — and block proposers capture a share of it. It's a meaningful but volatile boost that spikes in busy markets and fades in quiet ones.
The risks priced into that yield
Slashing: validators that break protocol rules (double-signing, extended downtime) lose a portion of stake — rare with competent operators, never zero. Liquidity/unbonding: many networks impose exit queues or unbonding periods during which you earn nothing and cannot sell; the yield partly pays for that lockup. Price risk dominates everything: a 4% annual yield on an asset that can move 10% in a day is a rounding error in your total return. Staking is a way to hold an asset more productively — it is not a reason to hold it.
Liquid staking and its extra layer
Liquid staking tokens (stETH and peers) hand your stake to a protocol and give you a tradable receipt, solving the lockup problem. In exchange you add smart-contract risk, operator-set risk, and the possibility of the receipt trading below the underlying during stress — stETH's 2022 discount during the Celsius/3AC unwind was the canonical example. Reasonable trade, but a trade.
The red flag heuristic
Ethereum staking pays low single digits. So when something advertises 15%, 30%, or "up to 90% APY," ask the only question that matters: who is paying this, and why? The honest answers are usually "inflationary token emissions that dilute you as fast as they pay you" or "incentives funded by the token's own treasury to rent temporary liquidity." Celsius advertised double-digit "rewards" right up until bankruptcy revealed the yield came from lending customer deposits into the abyss. If you cannot trace the yield to issuance, fees, or MEV — someone doing real, priced work — the yield is probably you.