Introduction

The global financial markets generate a vast and continuously evolving volume of data across asset classes, regions, and trading venues. Accessing the right information efficiently—and understanding how that information is structured—is critical for market participants, analysts, and technologists alike. This document serves as a practical guide to navigating LSEG data and news services with clarity and confidence.

The guide explains how LSEG organizes real-time and historical data, including the use of LSEG Instrument Codes (RICs), pages, chains, tiles, and field identifiers (FIDs). It provides structured, asset-class–specific guidance covering equities, bonds, foreign exchange, money markets, futures, options, commodities, energy markets, and contributed data. In addition, it outlines tools and workflows available within LSEG platforms to help users locate, retrieve, and contextualize data efficiently.

Rather than functioning as a static directory of codes, this document focuses on helping users understand the underlying data structures and navigation principles. By becoming familiar with these patterns, users can more easily discover relevant instruments, interpret market information, and adapt to ongoing changes in markets and datasets.

This guide is intended for both new and experienced LSEG users and applies across multiple delivery platforms and applications. Its objective is to enable users to make full and effective use of their LSEG subscriptions by providing clear explanations, practical examples, and best practices for finding and working with financial market data.