Explanation:

It was created by the London-based Baltic Exchange that measures change in the cost of transporting various raw materials. The exchange directly contacts shipping brokers to assess price levels for a given route, a product to transport and time to delivery, or speed. The Baltic Dry Index is a composite of three sub-indices that measure different sizes of dry bulk carriers or merchant ships: Capesize, Panamax and Supramax. The Baltic Exchange, which calculates the index by assessing multiple shipping rates across multiple routes for each of the BDI component ships, issues the BDI daily. Analyzing multiple geographic routes for each index gives depth to the index's composite measurement