# Baltic Dry Index (BDI): Understanding Its Impact on Global Trade

## What Is the Baltic Dry Index (BDI)?

The Baltic Dry Index (BDI), created by the London-based [Baltic Exchange](https://www.investopedia.com/terms/b/baltic-exchange.asp), is a shipping and trade index that tracks the cost of transporting [raw materials](https://www.investopedia.com/terms/r/rawmaterials.asp) like coal and steel. As it reflects supply and demand for shipping capacity, the BDI is often seen as a leading economic indicator, giving insight into global trade activity.

It is made up of four sub-indices: Capesize, Panamax, Supramax, and Handysize, which represent different sizes of dry bulk carriers. By capturing shifts in shipping costs across vessel types, the BDI provides a useful measure of trends in the world economy.

### Key Takeaways

*   The Baltic Dry Index (BDI) is a vital indicator of global economic activity because it reflects the supply and demand dynamics for raw materials essential to construction and manufacturing industries.
*   Due to its reliance on raw materials and limited supply of large carriers, the BDI is subject to considerable volatility, offering investors early signals of economic expansion or contraction.  
    
*   The index aggregates rates for different types of dry bulk carriers—Capesize, Panamax, Supramax, and Handysize—across more than 20 shipping routes, giving it a comprehensive scope.
*   The BDI has demonstrated its predictive capability in anticipating economic trends, such as its decline before the 2008 recession and its fluctuation during the COVID-19 pandemic.
*   It tracks shipping costs across different vessel sizes, affecting commodities like coal, iron ore, and grain, thus impacting numerous sectors globally.  
    

## How the Baltic Dry Index Measures Shipping Costs

The Baltic Exchange calculates the index by assessing multiple shipping rates across more than 20 routes for each of the BDI component vessels. Analyzing multiple geographic shipping paths for each index gives depth to the index's composite measurement. Members contact [dry bulk shippers](https://www.investopedia.com/terms/d/dry-bulk-commodity.asp) worldwide to gather their prices and they then calculate an average. The Baltic Exchange issues the BDI daily.

A change in the Baltic Dry Index can give investors insight into global supply and demand trends. Many consider a rising or contracting index to be a leading indicator of future economic growth. It's based on raw materials because the demand for them portends the future. These materials are bought to construct and sustain buildings and infrastructure, not at times when buyers have either an excess of materials or are no longer constructing buildings or manufacturing products.

The Baltic Exchange also operates as a maker of markets in [freight derivatives](https://www.investopedia.com/terms/f/freight_derivatives.asp), including types of financial forward contracts known as forward freight agreements.

## Understanding BDI Vessel Sizes and Capacities

The BDI measures shipments on various sizes of cargo ships. Capesize boats are the largest ships in the BDI with 100,000 deadweight tonnage (DWT) or greater. The average size of a Capesize ship is 156,000 DWT.

This category can also include some massive vessels with capacities of 400,000 DWT. Capesize ships primarily transport coal and iron ore on long-haul routes and are occasionally used to transport grains. They're too large to cross over the Panama Canal.

Panamax ships hold 60,000 to 80,000 DWT and mainly transport coal, grains, and minor bulk items like sugar and cement. They need special loading equipment and can just fit through the Panama Canal.

Supramaxes, or Handymaxes, are the smallest BDI vessels with a 45,000 to 59,999 DWT capacity. Although they are similar in size to Panamaxes, Supramaxes have special loading equipment and can access ports where Panamaxes cannot.

## Types of Dry Bulk Commodities in the BDI

[Dry bulk commodities](https://www.investopedia.com/articles/investing/030816/bulk-carrier-vs-container-vs-tanker-exploring-2016-shipping-market-c.asp) are usually divided into two categories: major bulks and minor bulks. Some examples of major dry bulk commodities include iron ore, coal, and grain. These major bulks account for nearly two-thirds of global dry bulk trade. Minor bulks include steel products, sugars, cement, and cover the remaining one-third of global dry bulk trade.

Coal and iron ore are among the most traded dry bulk goods worldwide. India, China, and Japan are the biggest importers of energy and electricity. Grain is another major cargo in terms of seaborne dry bulk trade and accounts for a chunk of the total dry bulk trade worldwide.

## Real-World Impacts of the Baltic Dry Index

The index can fall when the goods shipped are raw, pre-production material, which is typically an area with minimal levels of speculation. The index can experience high levels of volatility if global demand increases or suddenly drops off because the supply of large carriers tends to be small with long lead times and high [production costs](https://www.investopedia.com/terms/p/production-cost.asp).

Stock prices increase when the global market is healthy and growing, and they tend to decrease when it's stalled or dropping. The index is reasonably consistent because it depends on black-and-white factors of supply and demand without much in the way of influences such as unemployment and inflation.

The BDI predicted the 2008 recession in some measure when prices experienced a sharp drop. In one striking example of the insight that can come from the index, analysts could observe that between September 2019 and January 2020, the Baltic Dry Index (BDI) fell by more than 70%, a strong indication of economic contraction. This occurred directly ahead of the outbreak of the COVID-19 pandemic. Then, into 2021, the BDI rose dramatically as the pandemic led to snarls and delays in global shipping.

![BDI](https://www.investopedia.com/thmb/y32Ff8O27FN2lcSjh_mNFVrMYBU=/1500x0/filters:no_upscale():max_bytes(150000):strip_icc()/Clipboard01-acc45c3263204453bc5d8a4ee670d3ac.jpg)

*BDI.*

## The Bottom Line

The Baltic Dry Index (BDI) is a widely watched gauge of economic activity, tracking the cost of shipping dry bulk goods across global routes. Its movement reflects supply and demand in the shipping industry, making it a leading indicator of broader trade and growth trends.

Because the BDI is highly volatile, shifting with changes in carrier supply and demand, it can swing sharply, as witnessed during the 2008 recession and the COVID-19 pandemic, when it signaled major economic disruptions.

While it offers valuable insight into global conditions, the BDI shouldn't be the sole basis for investment decisions, and investors should consult additional data and professional guidance.  

> **Article Sources**
>
> 1.  Baltic Exchange. "[Dry Services](https://www.balticexchange.com/en/data-services/market-information0/dry-services.html)." Accessed September 22, 2021.
>     
> 2.  Bulk Carrier Guide. "[Various bulk carrier sizes and employment guide](https://bulkcarrierguide.com/size-range.html)." Accessed September 22, 2021.
>     
> 3.  Trading Economics. "[Baltic Exchange Dry Index](https://tradingeconomics.com/commodity/baltic)." Accessed Sept. 22, 2021.