Export Price Index y/y measures changes in prices of goods and services that are produced in and exported from the United States, in the given month compared to the same month of previous previous year.
The index calculation includes all goods, except for military goods, works of art, used items (including the restored and renovated ones), charitable donations, railway equipment and certain types of exports (custom capital equipment). The index includes cargo and passenger air transportation.
The index is used to measure the US inflation and economic activity. Readings above expectations are seen as positive for the US dollar.