Algorithmic Stablecoin

Algorithmic stablecoins attempt to maintain a $1.00 peg without holding equivalent fiat reserves. Instead, they use token supply manipulation, arbitrage incentives, and algorithmic mechanisms to balance supply and demand. The appeal is creating a decentralized, scalable stablecoin without reliance on centralized reserve custodians.

The history of algorithmic stablecoins is dominated by failures. Terra UST was the largest at $18 billion market cap before its complete collapse in May 2022. Before Terra, projects like Empty Set Dollar (ESD), Basis Cash, Iron Finance (which famously rugged during Mark Cuban's participation), and numerous others all lost their pegs permanently. According to a 2023 analysis by Messari, over 90% of algorithmic stablecoin projects launched between 2020-2023 failed to maintain their peg within 18 months.

The few surviving models employ hybrid approaches. Frax Finance started as partially algorithmic but progressively increased its collateral ratio toward full backing. RAI by Reflexer uses a non-pegged model with a floating target price adjusted by a PID controller, sidestepping the $1.00 peg entirely. LUSD by Liquity maintains a hard floor through direct ETH redemptions.

The fundamental challenge is the "reflexivity death spiral": when the stablecoin trades below peg, the seigniorage token used to absorb the selling pressure also declines, reducing confidence further, creating more selling — a self-reinforcing negative loop. No purely algorithmic design has solved this problem at scale.

Regulators have taken notice. Multiple jurisdictions now specifically restrict or ban unbacked algorithmic stablecoins following the Terra collapse.