Auto-Compounding
Automatic reinvestment of yield back into a position by a vault, so value compounds through a rising share price with no manual claiming.
Auto-compounding is the automatic reinvestment of earned yield back into the position that generated it, so returns compound continuously without the holder claiming or restaking anything.
The pattern is usually implemented by a vault. The vault harvests reward tokens from an underlying strategy, swaps them into the deposited asset, and deposits the proceeds back into the strategy. Instead of accumulating a claimable rewards balance, each vault share simply becomes redeemable for more of the underlying asset over time. Because one harvest transaction serves every depositor, gas costs are shared, which makes frequent compounding economical even for small positions.
ERC-4626, the tokenized vault standard, expresses this cleanly: the vault's share price, meaning assets per share, drifts upward as yield is reinvested. Beefy built its product around auto-compounding vaults, and vaults from Yearn, Morpho, and others follow the same accrual pattern. Exchange-rate liquid staking tokens such as wstETH behave similarly, growing in redemption value rather than paying out rewards.
Auto-compounding does not create yield: it only reinvests whatever the underlying strategy produces. If the strategy's rate falls, the compounded result falls with it, and strategy losses reduce the share price just as gains raise it. Vaults also commonly take a fee at harvest time, and every added contract layer adds smart contract risk. Compounding is a convenience and an efficiency, not a guarantee of returns.