What Is a Validator?
A validator is a node in a proof-of-stake blockchain that participates in proposing and confirming new blocks. Validators lock up (stake) the network's native token as collateral, and in return earn block rewards and transaction fees. If a validator acts dishonestly or goes offline, a portion of their stake is "slashed" as penalty.
How Validators Work
On Ethereum, becoming a validator requires staking 32 ETH. The protocol randomly selects validators to propose blocks and assigns committees of validators to attest (verify) each block. Validators must maintain high uptime and follow protocol rules. Delegation services (Lido, Rocket Pool) allow users to stake without running their own validator.
Why It Matters for Traders
Validator metrics reveal network health: validator count, staking participation rate, and queue depth indicate network growth and security confidence. For yield-oriented traders, validator performance (uptime, MEV extraction, fee optimization) directly impacts staking returns. The validator entry/exit queue also signals demand for staking and potential changes in staked supply.
