The four yield primitives
1. Liquid staking. Lock ETH with Lido, get stETH. Earn ~3.4% staking yield while keeping a liquid token you can lend, loop or LP.
2. Yield trading. Pendle splits any yield-bearing asset into principal (PT) and yield (YT) tokens. You can lock in fixed rates or speculate on yield direction.
3. Synthetic dollars. Ethena's USDe is a delta-neutral basis trade in a token. Pays ~14% sUSDe yield in normal markets, with transparent funding exposure.
4. Curated lending. Morpho and Euler v2 let curators run isolated lending vaults — better risk segregation than the old Aave-style pools.