In the rapidly evolving world of Decentralized Finance (DeFi), Frax Finance has emerged as a beacon of innovation and stability. Founded in 2019 by Sam Kazemian, Frax Finance embarked on a journey to redefine the concept of stablecoins. Its unique approach combines the resilience of collateralized tokens with the flexibility of algorithmic models, aiming to enhance stability and efficiency in the DeFi sector. With the introduction of its signature stablecoin, FRAX, and a suite of subprotocols like Fraxswap, Fraxlend, and Frax ETH, Frax Finance is carving out a distinct niche in the DeFi ecosystem, offering users a diverse range of services from efficient market operations to secure cross-chain transfers and profitable staking options.


Frax Finance, conceived by Sam Kazemian in 2019, embarked on a mission to revolutionize the stablecoin arena within the DeFi (Decentralized Finance) sector. At its core, Frax Finance was envisioned as a hybrid stablecoin, ingeniously melding the features of both collateralized and algorithmic models. This innovative approach was aimed at injecting stability and efficiency into the rapidly evolving DeFi landscape.

Kazemian’s vision was not just about creating another digital currency. Instead, it was about forging a new path in the world of stablecoins, one that could potentially address some of the challenges and limitations faced by traditional models. Frax Finance was thus established with the ambitious goal of redefining stability in the digital currency space, setting new benchmarks for how stablecoins could operate and thrive in the DeFi ecosystem.

What is Frax Finance?

Frax Finance stands out in the DeFi landscape as a pioneering platform, particularly known for issuing its stablecoin, FRAX. This stablecoin is distinct in its composition, as it intelligently blends the characteristics of both collateralized and algorithmic stablecoins. The result is a partially collateralized stablecoin, which aims to overcome the limitations inherent in traditional stablecoin models.

The primary objective of Frax Finance is to offer a solution that is both more stable and more decentralized than its predecessors. This ambition addresses some of the key challenges faced by earlier stablecoin models, pushing the boundaries of what is achievable in the realm of digital currency stability.

Beyond its unique stablecoin, Frax Finance introduces a liquid staking protocol that significantly enhances the Ethereum staking experience. This protocol allows users to stake their ETH in exchange for Frax Ether (frxETH), a liquid ETH staking derivative. frxETH is designed to fully leverage the capabilities of the Frax Finance ecosystem, thereby maximizing staking yields.


The Frax Protocol is at the forefront of issuing innovative and decentralized stablecoins, supported by a range of subprotocols designed to sustain and enhance them. Currently, the Frax Protocol issues three distinct stablecoins: FRAX, FPI, and frxETH, each playing a unique role in the ecosystem.

$FRAX: The Dollar-Pegged Stablecoin

FRAX v3 represents the evolution of stablecoins. It’s a dollar-pegged stablecoin that employs AMO (Algorithmic Market Operations) smart contracts and a suite of permissionless, non-custodial subprotocols as stability mechanisms. Internally, Fraxlend and Fraxswap are used to maintain stability. Fraxlend is a decentralized lending market, and Fraxswap is an automated market maker (AMM) with specialized features. Externally, Curve is utilized as another stability mechanism. Governed by the community, FRAX v3 can seamlessly incorporate additional subprotocols and AMOs as new stability mechanisms emerge. Initially hybrid in nature, combining collateralized and algorithmic models, $FRAX has transitioned towards full collateralization.

FXS: The Governance and Collateral Token

Frax Share (FXS) serves as a governance and collateral token within the Frax Finance ecosystem. FXS is pivotal for the stability of the FRAX stablecoin and the protocol’s overall success. Holding FXS tokens enables users to participate in governance, influencing key decisions and adjustments. FXS also acts as secondary collateral for FRAX, with its supply dynamically adjusted to maintain the stablecoin’s dollar peg. Moreover, users can stake FXS to earn rewards and provide liquidity in decentralized exchanges, thus supporting the Frax Finance ecosystem’s stability and liquidity.

Frax Price Index ($FPI)

FPI stands out as a unique stablecoin pegged to a basket of consumer items as defined by the US CPI-U average. Adjusting monthly based on an on-chain CPI oracle, FPI offers holders a reflection of the dollar’s value in real-time consumer goods pricing. This novel approach to stablecoin design positions FPI as a pioneering force in the stablecoin sector, directly linking its value to real-world economic indicators.

The Frax Ecosystem

Frax Finance has developed an array of subprotocols, each contributing uniquely to the robustness and versatility of the ecosystem. These subprotocols include Fraxswap, Fraxlend, Fraxferry, and Frax ETH, offering various services from automated market making to lending and bridging technologies.


Fraxswap stands out as the first AMM (Automated Market Maker) to incorporate a Time-Weighted Average Market Maker (TWAMM). This feature is particularly beneficial for executing large orders, as it distributes them over an extended period, minimizing their impact on market prices. Rooted in the Uniswap V2 codebase, TWAMM enhances the efficiency of large transactions. The Frax protocol leverages this capability to maintain the FRAX peg and channel protocol profits back to FXS holders through TWAMM purchases. It strategically utilizes Fraxswap for actions like buying back and burning FXS from AMO profit, printing new FXS for FRAX stabilization, and responding to market conditions.


Fraxlend serves as a non-custodial lending platform for various ERC-20 assets within the Frax ecosystem. Lenders on Fraxlend receive an ftoken that accumulates interest over time, reflecting the value of the loan. The platform employs oracle technology for optimal pricing, ensuring fair conditions for both borrowers and lenders. Interest rates on Fraxlend are determined through an algorithmic process, balancing the needs of all participants.


Recognizing the risks associated with bridge exploits in the crypto industry, Frax introduced Fraxferry, a platform designed for the secure transfer of Frax-based tokens across multiple blockchains. Fraxferry’s bridging technology prioritizes security, even if it means a slightly longer processing time for token transfers. This approach reflects Frax Finance’s commitment to providing a secure environment for its users, especially in light of the frequent bridge exploits seen in the wider crypto industry.

Frax ETH

In October 2022, Frax expanded its services to include ETH staking. frxETH, a stablecoin within the Frax ecosystem, is pegged to the value of ETH. To earn staking interest on this asset, users need to lock their frxETH and exchange it for sfrxETH. The sfrxETH token conforms to the ERC-4626 standard and accumulates interest from the Frax ETH validator, along with other additional profits. This token is designed to potentially offer a higher Annual Percentage Rate (APR) than other liquid staking platforms, through its unique incentive system.


Frax Finance stands as a testament to the potential and dynamism of the DeFi world. By innovatively blending collateralized and algorithmic elements in its stablecoin, FRAX, the platform has set a new standard in the realm of digital currencies. The comprehensive ecosystem of Frax Finance, with its array of subprotocols like Fraxswap and Fraxlend, not only provides users with a variety of financial services but also showcases the platform’s commitment to security, efficiency, and user empowerment. As the DeFi landscape continues to grow and evolve, Frax Finance remains at the forefront, continually adapting and expanding its offerings to meet the changing needs of the global digital finance community.