British Preliminary Gross Domestic Product (GDP) is a key release and is published each quarter. GDP measures production and growth of the economy, and is considered by analysts as one the most important indicators of economic activity. A reading which is better than the market forecast is bullish for the pound. Here are all the details, and 5 possible outcomes for GBP/USD. Published on Friday at 8:30 GMT. Indicator Background There are three versions of British GDP, and Preliminary GDP is the earliest release and tends to have the most impact. Traders should pay close attention to the GDP release, as an unexpected ... (full story)