RWAs in DeFi: collateral, leverage and stablecoin reserves

Three ways to be "in DeFi", three different numbers

DeFi, short for decentralized finance, is the set of lending, trading and savings programs that run as smart contracts on public blockchains. Aave and Morpho are lending markets of this kind: anyone deposits, anyone borrows against collateral, and the contract enforces the rules.

A tokenized asset can sit in DeFi in three senses. Collateral is a token deposited in a lending market against which someone has actually borrowed. A reserve asset is a token on a protocol's own balance sheet, backing that protocol's own product, as when Sky holds BUIDL behind its stablecoin. A pool asset is a token parked in a trading pool so others can swap it. Only the first makes the same asset do a second economic job at the same time.

Each sense gives a different share of the market. The base is the distributed market, the tokens investors can move between wallets, which RWA.xyz put at about 33.5 bn USD in July 2026. Only a distributed token can be deposited into someone else's contract, so it is the only fair denominator.

The first two rows are the author's estimate, assembled from public readings dated November 2025 to September 2026; no data provider publishes a figure for tokenized assets pledged in lending markets. The third comes from BeInCrypto citing RWA.xyz for the second quarter of 2026, and it probably counts some wrapped tokens more than once.

When someone quotes "RWA in DeFi", ask which row they mean. Headlines usually quote the widest number and describe the narrowest activity.

How a lending market accepts a whitelisted fund

Overcollateralization is the rule DeFi lending rests on: the borrower pledges more than the loan is worth, so the market can sell the pledge if its value falls. The history chapter records why: unsecured on-chain credit lost money in 2022 and after.

A tokenized fund does not fit that machine easily. Its token may only be held by addresses on the issuer's whitelist, while a normal lending market lets anyone take over and sell a pledge.

Aave solved this with Horizon, a separate Aave market on Ethereum launched on 27 August 2025. Its design is permissioned collateral with permissionless liquidity: only whitelisted investors may post the fund tokens, while anyone may supply the stablecoins (USDC, RLUSD, GHO) that get borrowed against them. The deposited fund is represented by a receipt token that cannot be transferred, so the pledge never leaves the whitelist. LlamaRisk sets the risk parameters, and the fund's price arrives through a Chainlink feed of its net asset value.

Horizon is the only RWA collateral market that reached measurable scale, and its readings suggest it peaked early in 2026.

Utilization, the share of deposits that has been borrowed, was about 30% on the November reading. Even at its peak, Horizon's borrowing was well under 1% of the distributed market.

Below Horizon the markets fall away quickly. Morpho, a lending protocol where independent curators build separate markets, carried 330 to 400 mn USD of RWA collateral in mid-2026 across dozens of markets. On Solana, Kamino accepts tokenized stocks and funds: Superstate's USCC fund had 4.4 mn USD posted there on 16 July 2026, against 140 mn USD in the fund.

The leverage loop and its one-line condition

Looping is a strategy in four steps: post a fund as collateral, borrow a stablecoin, buy more of the fund, and post it again. Each turn adds exposure on the same starting capital. Loan-to-value ratio, or LTV, means how much you may borrow per dollar pledged; at 50%, repeating the loop without end doubles your exposure.

The whole question reduces to one line. The loop beats simply holding the fund if and only if the borrow cost is below the fund's yield. Leverage multiplies the gap between the two rates. It never changes which way the gap points.

Take a fund yielding 3.56% a year and see what the loop returns at different borrow costs.

Cheap borrowing adds half a point. Expensive borrowing gives up more than half the yield, and more leverage on the same expensive loan turns the return negative.

The trap is that both rates move. USCC, the crypto carry fund used in some loops, showed a 30-day yield of 9.18% on RWA.xyz on 4 September 2026, and about 3.56% a month earlier. Its issuer warns the figure can be negative. A loop that paid well in August could lose money in October with no change in its settings. That is why Morpho's launch of fixed-rate borrowing on Base in July 2026 matters: it pins down one of the two rates.

Deep dive The return formula

With a loan-to-value ratio L, a collateral yield y and a borrow cost b, an infinite loop gives total exposure of equity divided by (1 − L) and a return on equity of (y − b·L) / (1 − L). Subtract y from that and the result is proportional to (y − b), which is why the sign depends only on whether b is below y. At L = 70% the leverage is 3.33 times, and with y = 3.56% and b = 5.5% the return is −0.97%.

Every collateral value in that formula arrives through a price feed, which is why oracles and NAV belong in any risk review of a loop.

Who actually holds tokenized Treasuries

The largest buyer of tokenized Treasuries is not a pension fund or a bank. It is a DeFi protocol's balance sheet.

Sky, formerly MakerDAO, issues a dollar stablecoin and must hold assets behind it. In 2025 it ran a public tender for 1 bn USD of tokenized short-term US debt. Thirty-nine teams applied, Steakhouse Financial scored them on liquidity and capital efficiency, and the first tranche went 500 mn USD to BlackRock's BUIDL, 300 mn USD to Superstate's USTB and 200 mn USD to Centrifuge's JTRSY. A second 1 bn USD tranche went to the same three, taking Spark, Sky's lending arm, to 2.4 bn USD of value locked.

Two more buyers follow the same pattern. Grove, another unit in the Sky ecosystem, started with 1 bn USD in JAAA, a tokenized Janus Henderson fund holding AAA-rated slices of pooled corporate loans, on Centrifuge. Ethena, which issues the synthetic dollar USDe, holds JAAA as a reserve asset, with a cap of about 310 mn USD in June 2026.

None of that money is pledged against a loan. All of it is reserve.

This changes how to read the segment. The assets of BUIDL, USTB and JTRSY reflect one DAO's decisions about where to park reserves. That demand is real and measurable. It is also concentrated, so a governance vote can move a fund's size more than any marketing campaign.

Stablecoin rules push yield into tokenized funds

The link between stablecoins and RWAs runs through the law. The GENIUS Act, the US stablecoin law signed on 18 July 2025, bars issuers of payment stablecoins from paying interest to holders. A holder who wants yield on on-chain dollars therefore has to step out of the stablecoin and into something else, and a tokenized Treasury fund is the closest step. See the rules chapter for the details.

The fastest inflow of this kind on record is syrupUSDG, a Maple lending pool denominated in the USDG stablecoin, which launched on Robinhood Chain as the collateral behind Robinhood Earn and reached 200 mn USD in eight days around August 2026.

Stablecoin reserves themselves mostly still sit in traditional wrappers. About 80% of USDC's reserve was held in a dedicated money-market fund managed by BlackRock and custodied at BNY in June 2026, a conventional fund rather than a token. In euros the pattern is different: Spiko's tokenized euro bill fund, EUTBL, backs Usual's euro stablecoin EUR0.

A tokenized deposit is not a stablecoin

A stablecoin and a bank deposit on a chain can look identical in a wallet. They differ in who owes you the money.

A stablecoin is a claim on its issuer, backed by a separate pool of reserves under a stablecoin rule book. A tokenized deposit is a claim on a bank, recorded in the bank's own books and moving on a network the bank controls, under ordinary banking law. It can pay interest, because it is a deposit.

J.P. Morgan's Kinexys is the largest example. It says it settles more than 7 bn USD a day across eight currencies, and its dollar deposit token, JPMD, went live on Coinbase's Base network on 12 November 2025. That daily figure is a flow inside a closed system. It has no common unit with the stock of tokenized assets and does not belong in the same comparison.

The legal difference shows up in how hard a token works.

Anyone can receive a stablecoin; only a whitelisted address can receive a tokenized fund. On the same chains, with the same fees and speed, that one rule accounts for a gap of up to three orders of magnitude.

Where RWA collateral could break

Four risks exist only when the collateral is a real-world asset, and none has yet been tested by a real crisis.

The first is liquidation. A normal DeFi liquidator repays the loan, takes the collateral at a discount and sells it in the same transaction. A tokenized credit fund may have no buyer, only a redemption window at the issuer that can take 60 to 180 days in private credit. The second is the whitelist: only approved addresses may receive the collateral, which rules out most of the automated liquidators that keep DeFi solvent. The third is a stale price. On 4 September 2026 the author read an NAV oracle on Ethereum whose name matches Horizon's pricing layer for USCC: its last update was 225 days old. Whether a live market consumes that feed was not established. The fourth is concentration: in the end the issuer becomes the buyer of last resort.

What to watch next

• A fresh Aave Horizon reading. The last dated one is from May 2026. A new high would mean the early-2026 peak was a pause; a lower number would confirm a shrinking market.
• The first real RWA liquidation. How it ends, and who buys the collateral, will set risk parameters across the category.
• Fixed-rate borrowing. If fixed-rate markets such as Morpho's grow, loops become predictable enough for treasurers, not just traders.
• Sky's next allocation vote. A single governance decision can move the size of the largest tokenized Treasury funds.
• The GENIUS Act's effective date. Without final rules, the law takes effect by default on 18 January 2027, and the yield ban will then bite on every US-regulated payment stablecoin.