Gross Domestic Product (GDP) measures the annualized change in the inflation-adjusted value of all goods and services produced by the economy. It is the broadest measure of economic activity and the primary indicator of the economy's health.
Usual Effect: Actual > Forecast = Good for currency
Frequency: Released monthly. There are 3 versions of GDP released a month apart - Advance, second release and Final. Both the advance the second release are tagged as preliminary in the economic calendar.