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CLOB Trading Platform for US Treasuries
Successfully delivered platform in just 8 months, to be met with immediate market acceptance from the platform users: banks, broker-dealers, professional trading firms, and institutional investors. One of the fastest, most stable, and most reliable ultra-low latency matching engines in the cash UST marketplace which helped the client reclaim market share in the highly competitive UST trading space.
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High-performance CLOB Trading Platform for US Treasuries: A Market Leader ReimaginedWhen our client, a leading interdealer broker, reached the end of a non-compete agreement that had restricted their involvement in the US Treasuries space the client identified a critical opportunity to expand their electronic markets trading platform by introducing a tool that would provide both sell-side and buy-side traders with seamless access to US Treasury liquidity. However, time was of the essence in this highly competitive market.
Client
A leading interdealer broker
Industry
Financial Services Fixed income trading
Services
UX/UI design,
Front-end architectural design,
Expanding platform functionality
The Challenge
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Rapid Development Timeline
The client required a quick turnaround to capitalize on the market opportunity.
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Integration with Existing Systems
The new platform needed to seamlessly integrate with the client's existing trading infrastructure and workflows.
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Complex Market Dynamics
The US Treasury market is one of the most liquid and fast-moving fixed-income markets in the world

Initially, 28Stone had been engaged to develop a central limit order book (CLOB) tailored for a slower-paced government bond trading environment. Midway through the project, the client’s priorities shifted dramatically, and they tasked 28Stone with pivoting the application to cater to the unique demands of the US Treasuries market, one of the world's most liquid and fast-moving markets. 28Stone's ability to quickly pivot and deliver a high-quality solution was instrumental in the project’s success. 

The initial requirement for the 28Stone team was to build the front end of this new trading platform. This challenge was amplified by the need for rapid development and adaptation of a tool that could meet the rigorous expectations of institutional traders while integrating seamlessly into the client’s established e-markets suite. Leveraging deep expertise from years spent designing, building, and enhancing similar electronic trading platforms, 28Stone was uniquely positioned to respond. The team had to reimagine the project’s scope and deliver a market-leading platform frontend under tight deadlines without compromising quality or functionality.

The Solution
28Stone swiftly pivoted its ongoing project to focus on developing a high-performance CLOB Trading Platform for US Treasuries. To meet the aggressive timeline and evolving requirements, 28Stone initiated a comprehensive UX and front-end architectural spike. This effort was aimed at transforming the existing application into a robust platform that could handle the fast-paced trading requirements of the US Treasuries market. Collaborating closely with the client’s stakeholders, the team identified and implemented features critical to UST trading.

The design process focused on creating intuitive browser-based and OpenFin-compatible desktop screens that supported these new features while maintaining a cohesive look and feel with the client’s existing e-markets branding. This required careful consideration of the platform’s usability and visual identity, ensuring that the application not only met functional requirements but also upheld the client’s reputation for delivering sleek, user-friendly trading solutions.

Through iterative design and development cycles, the team ensured that all functional elements were rigorously tested for performance, scalability, and reliability. The agile approach allowed for constant alignment with client objectives, ensuring the final product was perfectly suited to the market’s demand for a fully electronic US government securities trading venue.

The Result
28Stone successfully delivered the transformed platform in just 8 months, an impressive feat given the scope of work involved. The application was met with immediate market acceptance from the platform users: banks, broker-dealers, professional trading firms, and institutional investors. The platform’s UI became the gold standard for CLOB functionality across the client’s entire suite of trading platforms.
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Fast Delivery
Market-ready platform delivered in just 8 months
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Market Share
Reclaimed market share in the highly competitive US Treasuries trading space
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Matching Engine
One of the fastest, most stable, and most reliable ultra-low latency matching engines in the cash UST marketplace

One of the fastest, most stable, and most reliable ultra-low latency matching engines in the cash UST marketplace. The new CLOB Trading Platform for US Treasuries has significantly improved the client’s trading capabilities and market position, allowing them to better serve their clients and gain a competitive edge. Since its launch it has been one of the fastest-growing U.S. Treasury trading platforms.

The launch not only allowed the client to re-enter the US Treasuries market but also enabled them to reclaim significant market share from established competitors. Traders on both the buy-side and sell-side recognized the platform’s value in providing fast, efficient access to liquidity, reinforcing its position as a key tool in the fixed-income trading ecosystem.
Even years after its initial release, the platform continues to grow its user base, solidifying its role as a US Treasury trading solutions leader. Beyond its immediate impact, the project demonstrated 28Stone’s ability to adapt and deliver a modern electronic trading platform under pressure, showcasing the team’s expertise in high-stakes, fast-moving financial technology environments.

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Session Matching
Session Matching
Post Trade Tear Ups
Post Trade Tear Ups
Trade Workup
Trade Workup
Central Limit Order Books
Central Limit Order Books
Auctions
Auctions
Dark Pool & Trade Crossing
Dark Pool & Trade Crossing
Voice Broker Whiteboards
Voice Broker Whiteboards
Optimized Trade Matching
Optimized Trade Matching
Continuous Matching
Continuous Matching
Interdealer RFQ
Interdealer RFQ
Volume Matching
Volume Matching
Client to Dealer RFQ
Client to Dealer RFQ
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28Stone is a software consulting company for the financial services industry headquartered in New York, NY, USA
28Stone is a software consulting company for the financial services industry headquartered in New York, NY, USA
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