The goal of the Fei Protocol is to maintain a liquid market in which ETH/FEI trades closely to the ETH/USD price. FEI achieves this via a new stability mechanism known as direct incentives. Direct incentive stablecoins use dynamic mint rewards and burn penalties on DEX trade volume to maintain the peg. FEI uses Uniswap as its incentivized DEX at launch. Governance can add and update DEX integrations and other incentives as needed. New supply of FEI enters circulation via a buy-only bonding curve denominated in ETH. We refer to the ETH accrued from purchases on the bonding curve as Protocol Controlled Value (PCV). We define PCV as any value which is completely owned and controlled by the protocol, without an IOU. It is a subset of Total Value Locked with a stronger use case. The Fei Protocol deploys its PCV exclusively as Uniswap ETH/FEI liquidity at the genesis of the protocol. This is a "liquidity-collateralized" model which removes the need for an overcollateralized debt position. As the supply grows, the bonding curve price approaches a fixed peg to the oracle price. The fixed peg bonding curve creates a guaranteed arbitrage opportunity when the Uniswap price trades above the peg. The protocol will use its liquidity PCV to backstop the Uniswap price when it trades below the peg for a certain period.