Is APY becoming a bad way to compare DeFi yield?
I keep seeing APY used as if yield opportunities are directly comparable, but I’m starting to think the number tells me very little unless I also know where the return comes from and what has to go wrong for me to lose money.
Once I started comparing RWA vs over collateralized lending the difference became even harder to ignore.
1. LP yield
I can earn trading fees, but the result also depends on range management, impermanent loss and the price movement of both assets a 15% displayed APY does not necessarily mean I end the year 15% ahead.
2. Overcollateralized lending
Here I’m looking at borrow demand and interest paid by borrowers, but I also have oracle risk, liquidation shortfalls, bad debt and smart-contract risk return can look simple while the protection mechanism underneath it is doing a lot of work.
3. RWA / business lending
This seems different again the yield can ultimately depend on a real business making its payments, while the downside moves into borrower default, collateral quality, legal enforcement and how long recovery takes.
Liquidity can also be very different if the loan has a fixed maturity.
4. So what am I actually comparing?
Two strategies can both show 10% APY while one exposes me to impermanent loss, another to liquidation-system failure and another to business credit risk.
I’m starting to think source of yield, path to loss and exit liquidity are more useful comparison points than APY itself.