DeFi looks sprawling from the outside and narrow from the inside. Strip away the branding and nearly every protocol is doing one of five things: swapping one token for another, lending deposits against collateral, turning staked coins into transferable tokens, issuing something that holds a stable value, or offering leveraged exposure through derivatives. The figures below were observed on DefiLlama on 8 September 2026 and move constantly.
1. Decentralized exchanges
A decentralized exchange lets anyone swap tokens against pooled reserves rather than against another trader's order. The dominant design is the automated market maker, which prices each trade from a formula applied to the pool's balances. The constant-product formula, in which the product of the two reserve balances stays fixed through a trade, remains the reference implementation.
Liquidity providers deposit both tokens in a pair and earn a share of trading fees. The category held $13.3 billion in total value locked on 8 September 2026, with Uniswap the largest single protocol at $3.6 billion, but TVL understates the category's importance: DEX trading volume across all venues ran at $9.79 billion in the trailing 24 hours on the same date.
The signature risk is impermanent loss, the shortfall a liquidity provider takes relative to simply holding both tokens when their relative price moves. A pool automatically sells the appreciating asset and accumulates the depreciating one. Fees can outweigh that drag in a busy, range-bound market and rarely do in a trending one.
2. Lending and borrowing
Lending markets accept deposits, lend them to overcollateralized borrowers and set the interest rate algorithmically from utilization, the share of the pool currently borrowed. Lenders earn the borrow rate less a reserve factor; borrowers post collateral and are liquidated if the position's value deteriorates past a threshold.
The category held $50.2 billion on 8 September 2026 across more than 500 tracked protocols, with Aave the largest at roughly $18 billion and Morpho second at roughly $9.7 billion. Lending is where most institutional-scale DeFi capital sits, largely because the product is legible: a rate, a collateral requirement and a liquidation threshold.
The signature risk is a liquidation cascade. Forced selling from one liquidation moves the collateral's price, which pushes other positions past their thresholds, which triggers more forced selling. When liquidations cannot clear at the assumed price, the shortfall becomes bad debt carried by the protocol's lenders.
3. Liquid staking and restaking
Liquid staking issues a transferable token representing coins staked with a proof-of-stake network, plus the rewards accruing to them. Holders keep the staking yield while retaining an asset they can trade or post as collateral, which is why liquid staking tokens are the most heavily used collateral in DeFi lending.
Liquid staking was the second-largest category at $52.1 billion on 8 September 2026, and it is the most concentrated of the five: Lido alone held roughly $24 billion, close to half the category. Restaking, which re-uses staked collateral to secure additional services, added a further $10.1 billion.
The signature risk is a depeg between the staking token and the underlying coin. The token is redeemable at a fixed exchange rate eventually, but trades at whatever the market pays now, and in stress that gap widens exactly when leveraged holders need to sell. Ether staking derivatives have traded at multi-percent discounts several times, most visibly in June 2022 and again in April 2024.
| Category | What it does | Signature risk |
|---|---|---|
| Decentralized exchanges | Swap tokens against pooled reserves at a formula price | Impermanent loss |
| Lending | Lend deposits against overcollateralized borrowing | Liquidation cascades and bad debt |
| Liquid staking | Tokenize staked coins so they remain usable as collateral | Depeg from the underlying asset |
| Stablecoins | Issue tokens that hold a fixed value | Reserve quality and redemption failure |
| Derivatives | Offer leveraged and hedged exposure without holding spot | Funding reversal and liquidation |
4. Stablecoins and collateralized debt positions
Stablecoins supply the unit of account for everything else. They divide into tokens backed by cash and short-dated government debt held by an issuer, tokens minted as overcollateralized loans against crypto, and synthetic dollars backed by a hedged trading position. The on-chain collateralized debt position category alone held $7.6 billion on 8 September 2026, led by Sky at $5.5 billion, while the total stablecoin market including centrally issued tokens stood at $305.6 billion.
The signature risk is redemption. A peg holds because arbitrageurs can profitably mint and redeem whenever the market price drifts. When redemption becomes slow, restricted or impossible, the peg is only as good as what buyers will pay, which is how USDC traded as low as $0.87 in March 2023 after $3.3 billion of its reserves were caught in a bank failure.
5. Derivatives and perpetual futures
Perpetual futures dominate on-chain derivatives. A perpetual tracks an asset's price with no expiry, anchored to spot by funding payments exchanged between longs and shorts. When the perpetual trades above spot, longs pay shorts, and the reverse when it trades below.
Measured by total value locked the category looks small, at $2.1 billion on 8 September 2026, because a perpetual venue holds only margin rather than the full notional. Volume tells the real story: Hyperliquid alone traded roughly $5 billion in perpetuals in the trailing 24 hours on that date.
The signature risk is funding reversal combined with leverage. Strategies that earn funding by holding a short against spot depend on funding staying positive; when sentiment flips, the income becomes a cost, and the leverage that made the trade attractive works in the other direction.
What the categorization leaves out
Two large categories sit outside the five because they are infrastructure rather than an activity. Bridges, which move assets between chains, held the largest tracked total of all at $52.8 billion on 8 September 2026 and have historically been the single largest source of DeFi hack losses. Real-world assets, mainly tokenized government debt, held $27.9 billion and are growing quickly, but the category's risk is off-chain legal enforceability rather than anything visible in a contract.