Upgrade frequency (per 90 days)

Yearn Finance's assessment for RD-F-137 — scored green on the v1.7.0 rubric. The evidence below is the curator's reasoning for this score.

Evidence summary #

V3 vault instances are immutable per-deployment (EIP-1167 minimal proxy with fixed VAULT_ORIGINAL — no Upgraded events emitted on vault instances). New versions use new VaultFactory. V2 vaults: fully immutable Vyper. 0 in-place contract upgrades in trailing 90 days on any core vault.

Sources #

GitHub
VaultFactory.vy — yearn-vaults-v3 GitHubyearn-vaults-v3: no EIP-1967 Upgraded events; vault instances cannot be upgraded in placeretrieved 2026-05-16
Docs
VaultFactory Docs — Yearn DocsVaultFactory: 'factory clones new vaults from VAULT_ORIGINAL immutable address' — no in-place upgradesretrieved 2026-05-16

Methodology #

Count the number of contract upgrades in the trailing 90 days via on-chain upgrade events.

See the full factor methodology and distribution across all protocols →

rubric_version v1.7.0 protocol yearn-finance factor RD-F-137 score green collected_at 2026-05-16 08:34:32