What is total value locked in DeFi?

Total value locked (TVL) is a metric that represents the aggregate dollar value of cryptocurrency assets deposited into decentralized finance (DeFi) protocols. These deposits serve various functions depending on the protocol: providing liquidity for decentralized exchanges (like Uniswap), serving as collateral for lending platforms (like Aave), generating yield in farming strategies, or being staked for network security. TVL is to DeFi roughly what assets under management (AUM) is to traditional finance.

TVL peaked at approximately $180 billion in late 2021 during the DeFi boom, collapsed to around $40 billion during the 2022 bear market and post-FTX fallout, and has partially recovered. The metric can be tracked at the protocol level (how much is deposited in Aave or Uniswap specifically), blockchain level (total TVL on Ethereum versus Solana versus Arbitrum), or ecosystem level (aggregate DeFi TVL). Data aggregators like DefiLlama provide real-time tracking across hundreds of protocols and dozens of chains.

Several important caveats apply to TVL interpretation. First, TVL is denominated in dollars, so it fluctuates with crypto prices even if the same amount of tokens is deposited. A 50% drop in ETH price mechanically reduces Ethereum DeFi TVL by half, even with zero actual outflows. Second, double-counting is pervasive: a user deposits ETH into Lido (counted in Lido's TVL), receives stETH, deposits that stETH into Aave (counted in Aave's TVL), borrows USDC, and deposits that USDC into Curve (counted in Curve's TVL). The same underlying capital appears in three protocols' TVL. Third, some protocols artificially boost TVL through incentive programs that attract mercenary capital, which leaves when incentives expire.

Despite these limitations, TVL trends provide genuine insight into DeFi adoption. Rising TVL at constant token prices indicates new capital flowing into DeFi. Protocol-level TVL comparisons reveal which platforms are gaining or losing market share. TVL denominated in native tokens (ETH) rather than dollars strips out price effects. For investors evaluating DeFi protocols, TVL is a necessary starting point, but it must be supplemented with metrics like revenue, fee generation, unique users, and capital efficiency to form a complete picture.