Spark (@sparkfinance): Building the Exchange Infrastructure for a Multi-Stablecoin Economy

Building the Exchange Infrastructure for a Multi-Stablecoin Economy Hundreds of Stablecoins. One FX Layer. As regulated digital assets move deeper into mainstream finance, the next challenge is connecting a growing number of stablecoins through liquidity infrastructure built to scale with them. Something significant is happening in US banking infrastructure. Over the past 18 months, nearly six in ten applications for new bank charters received by the OCC have involved some form of digital-asset activity. Applicants include @Ripple, @Coinbase, Fidelity Digital Assets, Morgan Stanley Digital and a growing group of companies building regulated infrastructure around digital assets. These aren't all stablecoin issuers. But the direction is increasingly clear: digital assets are moving deeper into regulated financial infrastructure, while stablecoins are expanding beyond a small group of crypto-native issuers. PYUSD and RLUSD are already examples of that expansion. Payment companies, fintechs and financial institutions are exploring their own forms of regulated digital money. As the market expands, so does a fundamental infrastructure challenge: how do you provide deep, efficient liquidity across a growing number of digital dollars without fragmenting capital between them? From more stablecoins to more fragmented liquidity Without shared infrastructure, every new stablecoin risks creating another isolated pocket of liquidity. We've seen a version of this problem before as crypto expanded across assets and chains, i.e. liquidity fragmented across ecosystems, making it increasingly complex and expensive to move between them. A multi-stablecoin economy risks recreating that fragmentation at a far greater scale. If every issuer has to establish its own inventory, trading relationships and liquidity routes against every other stablecoin, complexity grows with every new entrant. Liquidity depth becomes harder to maintain. Issuers repeatedly bootstrap similar infrastructure simply to make one digital dollar efficiently exchangeable for another. With a handful of major stablecoins, that's manageable. With dozens, potentially hundreds, it isn't. The alternative is shared liquidity infrastructure. That's the model Spark's Stablecoin FX Layer was built to enable. The market doesn't need hundreds of new stablecoin pools with shallow liquidity. It needs a way to concentrate liquidity and make that capital work across hundreds of stablecoins. Deep liquidity shouldn't have to be rebuilt every time a new stablecoin launches. The opportunity is to connect them into infrastructure that already has depth. That's the problem the FX Layer is designed to solve. Sam MacPherson, CEO, Spark. One liquidity foundation, multiple stablecoins Rather than requiring every stablecoin to bootstrap liquidity against every other stablecoin, Spark's Stablecoin FX Layer uses USDS as a common liquidity base. New stablecoins can connect into that shared liquidity network, creating efficient routes between assets without requiring a dedicated pool for every possible pair. PYUSD and USDT were the first major markets when the FX Layer launched on June 25, 2026. RLUSD is the latest stablecoin to join that network and an early demonstration of what happens when a new asset connects into liquidity infrastructure already operating at scale. USDC adds another dimension to this model. Through the USDS/USDC PSM, USDC can be converted 1:1 into USDS without a swap fee. From there, USDS provides the common route into the FX Layer's stablecoin markets, allowing USDC to connect with RLUSD, PYUSD and USDT without requiring separate USDC liquidity pools against each asset. @Uniswap routing makes this path accessible through a single swap experience. In its first week, RLUSD/USDS processed more than $600 million in volume. Across the network, the Stablecoin FX Layer has now processed more than $12 billion in cumulative volume since launching in June. During August, Spark supported USDS pairs accounted for over 50% of Ethereum stable-to-stable volume on Uniswap. Those numbers demonstrate more than demand for another stablecoin pair. They show the potential for a different liquidity model: one where new stablecoins can connect into an existing liquidity network, while the capital supporting that network can be programmatically allocated rather than left sitting idle in static pools. Liquidity that doesn't sit idle waiting for a trade Deep liquidity has traditionally required capital to remain committed to a pool, whether or not that capital is actively needed for trading. The FX Layer's is being built to change that, enabling liquidity to be made available dynamically for swaps while capital not currently required for exchange can remain productive through Spark Savings. Uniswap v4 also introduces programmable infrastructure that could make this model more dynamic over time. Hooks allow liquidity providers to customize how individual markets operate, creating the potential for capital to move more efficiently between productive strategies and exchange liquidity as demand changes. Uniswap is the largest onchain venue for trading stablecoins, with nearly $400 billion in stablecoin swaps so far this year. Hooks allow teams like Spark to customize markets to improve performance for their specific use cases. Our collaboration with Spark is off to an incredible start, with more than $12 billion in trading volume in under three months. Hayden Adams, Founder & CEO, Uniswap Labs. The longer-term model is more dynamic: coordinate liquidity across the Stablecoin FX Layer, keep capital productive when it isn't required for trading, and make it available to connected markets where demand emerges. Uniswap provides the exchange infrastructure for the network. @SkyEcosystem provides the deep USDS liquidity foundation for the network, while Spark provides the allocation framework for coordinating capital across approved venues and strategies as liquidity demand changes. Together, these components turn stablecoin liquidity from a series of isolated positions into a shared infrastructure that serves a growing network of stablecoins. From exchange liquidity to capital infrastructure But exchange is only one component of the financial infrastructure required for stablecoins to operate at institutional scale. Spark is now scaling the infrastructure supporting RLUSD to $375 million planned for deployment across capital allocation, exchange liquidity and credit. The allocation spans three complementary components: Capital allocation: $250 million deployed into the @SentoraHQ x Spark RLUSD @Morpho vault, jointly curated by Spark and Sentora, combining Spark's capital allocation expertise with Sentora's institutional risk management and DeFi strategy expertise. Exchange liquidity: $50 million allocated to the RLUSD/USDS market on Uniswap v4, approximately $25 million RLUSD and $25 million USDS, expanding the liquidity available through Spark's Stablecoin FX Layer. Credit: $100 million planned deployment into the SparkLend RLUSD lending market, extending RLUSD into Spark's on-chain credit infrastructure. Together, these allocations show how infrastructure can develop around a stablecoin across three distinct functions: capital deployment, exchange and credit. Rather than operating as isolated integrations, each provides a different part of the financial infrastructure required for RLUSD to operate at scale on-chain. "The friction in moving between stablecoins is one of the most important unsolved problems in decentralized finance, and we're glad to be working alongside Spark and its partners to address it.This is infrastructure the whole market benefits from." Anthony Demartino - CEO Sentora. The significance isn't any single pool, vault or lending market. Together, these deployments show the infrastructure developing around RLUSD as it scales, across deep exchange liquidity, to professionally curated capital deployment, to on-chain credit. For institutional stablecoins, these aren't isolated capabilities. They are complementary parts of the financial infrastructure required for digital money to operate at scale. From stablecoins to stablecoin infrastructure The growth in regulated digital-asset infrastructure suggests this challenge is only going to become more important. The surge in OCC digital-asset charter activity is one signal of a broader shift: more regulated institutions are building on-chain, and the number and variety of digital dollars is likely to grow with them. Not all of those institutions will issue stablecoins. But if the market moves from a handful of major issuers to dozens, potentially hundreds, rebuilding the liquidity stack for each one doesn't scale. For the next generation of stablecoin issuers, the opportunity is not simply access to another pool. It is access to deep liquidity infrastructure that already exists. Instead of independently assembling capital, liquidity venues, allocation systems, and operational infrastructure for every new stablecoin, those components can increasingly be provided as a coordinated service: deep base liquidity, programmable execution, professional liquidity management, and an allocation framework designed to coordinate capital efficiently across approved venues and strategies. That changes what scaling a stablecoin can look like. Issuers can focus on the utility, distribution and adoption while connecting into infrastructure designed to coordinate the liquidity and capital underneath their asset. RLUSD is an early proof point. The Stablecoin FX Layer has processed more than $12 billion in cumulative volume since launch, with RLUSD/USDS contributing more than $600 million in its first week alone. Now, with $375 million of RLUSD planned for deployment across capital allocation, exchange liquidity and credit, it demonstrates how the next generation of stablecoins can move beyond issuance into a deeper financial ecosystem spanning exchange liquidity, capital deployment and credit. As regulated digital money expands, its liquidity infrastructure needs to scale with it, and not be rebuilt every time another stablecoin enters the market. Hundreds of stablecoins. One FX Layer.