Stablecoins Mechanisms in Search of Stability
summary
Aave’s GHO stablecoin, which targets USD but currently trades at about 0.985, needs faster peg adjustment than governance rate changes (which take ~5–7 days). The team built and tested a PID controller in Python, found pure error-based control inadequate, and is reimplementing a combined PID + fuzzy-logic controller in Solidity that uses on-chain metrics and off-chain oracles (e.g., Chainlink, Binance liquidity) plus a “Ghostability” module; deployment will require DAO approval.
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chapters (14)
- 0:00Introduction
- 1:27What is a stablecoin
- 3:36Stablecoin categories
- 6:54Soft peg mechanisms
- 10:48Hard peg and redemption
- 13:23Governance vs rates
- 20:29Governance interest rates
- 25:05PID control intro
- 28:40PID limits and Fuzzy Logic
- 32:14Fuzzy Logic for stablecoins
- 36:26Fuzzy Logic benefits
- 39:57Implementation and flexibility
- 42:03Decentralized stablecoins
- 44:31Q&A
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