
Solving the Cold-Start Problem in Fixed-Rate Lending
This excerpt is from our research on Fixed-Rate Lending: Market Structure and Protocol Design, highlighting new and emerging designs in the category.
DeFi is becoming the operating layer for digital asset finance: vaults, lending markets, stablecoins, tokenised collateral, and structured yield products. Castle Labs tracks the infrastructure making that transition real, from Morpho and Aave to the curator model, RWA collateral, and the products that connect offchain capital to onchain execution. The reader question is practical: which systems are becoming durable financial infrastructure, and which are still yield theatre?
Sources: DeFiLlama protocol data (2026-11-01).
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Liquidity Providers (LPs) on Decentralised Exchanges (DEXs) have long faced a structural problem during market movements: as prices move on Centralised Exchanges (CEXs), which are hubs for spot liquidity and perform price discovery, DEXs still quote prices before the market moves, giving arbitrageur

Most onchain RWA yield today comes from short-dated US Treasuries (T-bills), wrapped in over 100 tokenised treasury products, including BlackRock’s BUIDL, Circle’s USYC, Ondo’s OUSG, and Franklin’s BENJI. Cumulatively, they represent $14.7 billion, or 38% of total onchain RWAs, and are among the mos

Stablecoins are becoming app-specific dollars.

Onchain options in three families: Derive and Paradex order books, binary markets on Polymarket, Kalshi and HIP-4, and option yield products from Rysk and Hegic.

EtherFi has been one of the fastest-growing neobanks for both crypto natives and retail users.

Today, the lending category has $28.5 billion in active loans, and almost all of that demand comes from variable-rate lending.

The growth of RWAs has led to over $32 billion of assets flowing onchain.

Only about $3 billion of the $28 billion RWA market is used in DeFi. How Pendle, Morpho, Aave, Kamino and Fluid use RWAs, and the new redemption tools.

Tokenised stocks are among the fastest-growing RWAs, with $1.6 billion distributed. How Mantle and Bybit built issuance, trading and redemption onchain.

Eight onchain vault categories, TVL by curator, and how lending, restaking, RWA and options vaults held up through the Stream, Resolv and Kelp blowups.

How crypto cards and onchain banks work, from Visa's $3.5B stablecoin card run rate to ether.fi Cash, Tria, Superform and Plasma One, and the regulatory gaps.

How tokenised stocks work across Ondo Global Markets, Kraken's xStocks and Hyperliquid perps, chasing a $69 trillion US equity market. Ondo holds $2.47b in TVL.
Castle works with protocols, investors, and market teams on category research, competitive analysis, and distribution.