Stablecoins have already become a major part of the cryptocurrency ecosystem, but the infrastructure that supports them is increasingly being tailored for traditional financial markets as well. That trend saw further development on September 16, when major stablecoin issuer Circle launched its public mainnet Arc, a new Layer-1 blockchain designed specifically for financial markets, real-time money movement and, increasingly, agentic commerce.
The network went live with over 100 applications and 100 institutional and ecosystem participants, including cryptocurrency exchanges, asset managers and payment networks.
Circle describes Arc as an economic operating system for the internet which aims to address one of the longstanding challenges concerning institutional blockchain adoption. For instance, while general-purpose public blockchains can support financial applications, other characteristics like fluctuating transaction fees and uncertain settlement times can make them harder to incorporate into regulated financial workflows. Arc, however, uses Circle’s USDC stablecoin to pay transaction fees while providing sub-second transaction finality and maintaining compatibility with Ethereum-based applications. In other words, Circle is trying to extend the programmability of public blockchain infrastructure while keeping costs and settlement more predictable for financial institutions.
Circle’s ambitions are bolstered by a broad group of institutions involved in operating the network. Founding validators include BlackRock, the Depository Trust & Clearing Corporation (DTCC), Intercontinental Exchange (ICE), Mastercard, Visa, and Standard Chartered, among others. The job of these validators is to help confirm transactions and maintain the integrity of the blockchain. As such, they’re participating in the operation of the network itself, rather than simply connecting their own applications to it. ICE, for instance, said that predictable fees and instant finality address several key practical concerns raised by its institutional customers around operating across traditional and digital markets.
Circle also designed Arc to bring stablecoin payments and tokenized traditional assets into a unified environment. The company’s StableFX service, for instance, supports round-the-clock currency trading and settlement, while tokenized funds like Circle’s own USYC and BlackRock’s BUIDL may be used for activities like trading, lending and collateral. Both Circle and DTCC also plan to enable tokenization of assets held at the DTCC starting in the second half of 2027. That could allow market participants to combine tokenized securities with stablecoin-backed settlement while retaining the protections associated with traditionally held assets.
Nonetheless, some of Arc’s more institutionally significant capabilities remain works in progress. Circle is still working on network-wide opt-in privacy features that designed to provide transaction confidentiality while allowing banks and other authorized parties to retain auditability. This is important, because regulated institutions can’t simply place commercially sensitive transaction information on a fully transparent public ledger without taking into account privacy and compliance requirements.
For fintechs and financial services institutions, Arc isn’t just another cryptocurrency network. Instead, it represents a broader effort to make blockchain infrastructure align with existing requirements concerning settlement, governance, privacy and regulated assets, as opposed to forcing institutions to themselves adapt to crypto-native infrastructure. Whether Arc achieves meaningful institutional adoption remains to be seen, but the involvement of big global names like Visa and Mastercard suggests that stablecoins and tokenized assets are rapidly becoming part of the mainstream financial infrastructure.