The Baltic Dry Index

What it is

The Baltic Dry Index (BDI) is a daily composite freight-rate benchmark published by the London-based Baltic Exchange. It measures the cost of chartering vessels to move dry bulk commodities, including iron ore, coal, grain, and minor bulks, across 20 major ocean routes. Each working day, an international panel of shipbrokers submits rate assessments for defined routes; the Exchange weights these into the BDI and into three size-specific sub-indices.

The three components, weighted as revised in March 2018, are: the Capesize Index (40%), covering vessels of roughly 150,000 deadweight tonnes that carry iron ore and coal on long-haul routes between Brazil, Australia, and East Asia; the Panamax Index (30%), covering 60,000-70,000-tonne vessels carrying coal and grain; and the Supramax Index (30%), covering 48,000-60,000-tonne vessels for minor bulks and agricultural cargoes. A Handysize component was removed from the BDI calculation in March 2018.

Because chartering decisions reflect actual cargo commitments, the BDI carries no speculative inventory component. Shippers do not book dry bulk freight capacity unless they have physical cargo to move, which makes the index a leading rather than lagging trade signal.

History

The Baltic Exchange traces its origin to 1744, when merchants and shipbrokers gathered at the Virginia and Baltick Coffee House in London to exchange shipping intelligence and conclude charters. The modern index began as the Baltic Freight Index (BFI), first published on 4 January 1985 as a standardized daily reading across defined bulk routes. The BDI replaced the BFI on 1 November 1999, consolidating the methodology around time-charter assessments.

The index's most dramatic episode was its 2008 collapse. From a historical peak of 11,793 points on 20 May 2008, driven by China's infrastructure-led commodity import surge, the BDI fell 94% to 663 points by December 2008, a plunge of roughly seven months. Academic analysis by the World Maritime University found the primary driver was an oversupply of vessels ordered during the boom, not a proportionate contraction in trade volumes. The BDI recovered partially before hitting an all-time low of 290 points in February 2016, reflecting a global shipbuilding glut against weakened commodity demand.

Current state

In 2025, the BDI fell an average of 28.2% year-on-year, reflecting soft Chinese steel production and rising fleet capacity. As of early July 2026, the index stood near 2,717 points, its highest since mid-June, supported by stronger iron ore flows from Australia and Brazil into East Asian ports. Capesize day-rates were running around US$23,000-23,500 and Panamax rates near US$17,000.

The dual-chokepoint disruption of mid-2026 complicated readings: container rates surged as carriers rerouted via the Cape of Good Hope to avoid both the Suez Canal and the partially-closed Strait of Hormuz, but the BDI, which tracks dry bulk rather than containerized cargo, registered a more mixed signal. UNCTAD's 2025 Review of Maritime Transport projected fleet supply to grow 2.6% in 2026 against dry bulk demand growth of only 1-2%, implying continued rate pressure absent new demand shocks.

Relationships

China is the dominant demand driver. Chinese iron ore imports from Brazil and Australia account for a disproportionate share of Capesize route activity, and shifts in Chinese steel output move Capesize rates and thus the overall BDI more than any other single variable. India, Japan, South Korea, and European utilities are secondary demand centers for coal and grain movements tracked through the Panamax and Supramax sub-indices.

On the supply side, the global dry bulk fleet is concentrated among operators registered in Greece, Japan, and China, with South Korean and Chinese shipyards supplying most new capacity. The 2025-2026 order book was weighted toward larger Capesize vessels and very large ore carriers commissioned during the 2021-2022 rate spike, contributing to the current oversupply pressure.

What to watch

The two most consequential variables are Chinese steel-sector policy and fleet delivery rates. A Chinese property-sector recovery or state infrastructure stimulus would lift iron ore imports and Capesize rates disproportionately. A sustained Hormuz reopening and Red Sea normalization could reduce the freight-rate support that rerouting has provided to adjacent vessel segments. UNCTAD forward freight agreement data through 2026 signaled Panamax and Supramax rate softening, making any demand upside from major commodity-importing economies the primary risk to monitor.