002 · London Stock Exchange

Municipal Market Monitor

2023–2024Financial marketsLondon

WebSockets
Live trade streaming
Multi-source
Fixed-income data
Releases
Migration to Workspace

Stack

Web Components · TypeScript · WebSockets · Node.js · GraphQL

Context

Municipal Market Monitor (TM3) is the fixed-income product clients use for US municipal bond information. It had to be redeveloped for LSEG Workspace so clients could move off the legacy experience with market depth and operations intact.

Approach

We built it in Web Components and TypeScript. Several fixed-income sources feed the product, and live trades stream over WebSockets. Node.js and GraphQL sit in the service layer, inside LSEG’s technical estate.

Outcome

A series of production releases carried clients from the legacy TM3 product onto the Workspace experience.

Selected work