The Baltic Dry Index explained
The Baltic Dry Index is the most quoted barometer of dry bulk freight, yet it is widely misread. This guide explains what the index measures, how its component indices are built, and where its limits lie.
What the index measures
The Baltic Dry Index is a composite of assessed freight rates for the main dry bulk vessel classes. It reflects the cost of moving unpackaged commodities — iron ore, coal, grain, bauxite and other bulks — over a basket of representative routes.
It is a price of transport, not a price of cargo. A rising index means shipowners are earning more per day; it does not by itself mean commodity demand is rising, because vessel supply moves the number just as forcefully.
Component indices
The composite is built from the Capesize (BCI), Panamax (BPI), Supramax (BSI) and Handysize (BHSI) sub-indices. Capesize movements dominate short-term swings because the segment is the most concentrated and the most exposed to iron ore and coal long-haul flows.
Each sub-index is derived from timecharter-equivalent assessments on defined routes, contributed by a panel of shipbrokers rather than transacted-exchange prices.
How to read it responsibly
Look at the sub-indices before the headline. A composite move driven entirely by Capesize tells a very different story from a broad-based rise across all four segments.
Separate demand signals from supply signals: congestion, drydocking, ballast positioning and weather routinely move the index without any change in underlying cargo demand.
Treat index levels as indicative. Values published on this site are illustrative and may be delayed; they are not a basis for trading decisions.