The Bloomberg Global Aggregate Index is a financial concept, specifically a flagship multi-currency benchmark index that tracks the performance of global investment-grade debt. It was created in December 1998, with its history backfilled to January 1, 1990, to provide a comprehensive measure of the world's leading bond markets. The index solves the problem of needing a single, high-quality, and broadly diversified reference point for global fixed-income investors.
The index works by including fixed-rate bonds from treasury, government-related, corporate, and securitized sectors issued by both developed and emerging markets. A key mechanism is the inclusion rule that securities must be rated investment grade (Baa3/BBB-/BBB- or higher) using the middle rating from Moody's, S&P, and Fitch. The index is largely composed of four regional benchmarks: the US Aggregate, the Pan-European Aggregate, the Asian-Pacific Aggregate, and the Canadian Aggregate Indices. It connects to the broader Bloomberg Multiverse Index, of which it is a component, and is used by global fund managers as a benchmark for passive funds like ETFs and to measure the performance of active funds.
The index has undergone changes, notably the inclusion of Chinese Yuan (CNY)-denominated debt, which was phased in at 5% increments over a 20-month period starting in April 2019 and reaching 100% inclusion by November 2020. A recent development is the ongoing push by India to secure inclusion of its government bonds in the index, which was deferred in January 2026 due to operational and market-infrastructure concerns. India's government has since introduced reforms, such as tax exemptions on interest and capital gains for Foreign Portfolio Investors (FPIs) and expanding the Fully Accessible Route (FAR), to address these concerns and make its debt market more attractive for inclusion.