How it's counted
Two kinds of collateral
Morpho markets each pair one collateral token with one loan token, so the figure is exact: tokens locked against a loan that's open now. On Aave and SparkLend a deposit backs your borrowing by default wherever the coin is allowed to, but plenty of depositors never borrow and are only earning interest. Their figure is the amount supplied where the coin can back a loan, either on its own or in an e-mode category for correlated assets, so treat it as an upper bound. The two are kept apart in the bar and by the switch above the table.
Savings versions
Some issuers wrap their coin in a deposit token that earns a rate: Ethena's sUSDe, Sky's sUSDS and stUSDS, sDAI, sUSDD. They're widely used as collateral and are counted with their coin, unless you untick the box. Wrappers built by others on top of a stablecoin (Maple's syrupUSDC, Pendle's principal tokens) are left out: they're separate products with their own risks.
What isn't counted
Compound v3 accepts a few stablecoins as collateral, but under $1 M in total across its markets in October 2026, so it isn't read. Neither are Fluid, Euler, Kamino, Venus or JustLend (where most USDD lends), nor Morpho markets that Morpho hasn't listed. Open USD isn't matched at all: its symbol, OUSD, also belongs to Origin Dollar. Coins are matched by their token symbol on each chain (USDT, USDT0, USD₮0 and so on all count as Tether).
Sources
Morpho's public API (blue-api.morpho.org) for every listed market; Aave's public API (api.v3.aave.com) for every Aave v3 market on every chain; SparkLend's PoolDataProvider on Ethereum, read through a public node, with each stablecoin valued at $1. Market caps come from CoinGecko. Your browser keeps the results for 30 minutes; if a source fails, its last answer (up to six hours old) is shown and flagged.