British Preliminary GDP, one of the most important economic releases, 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 Tuesday at 9:30 GMT. Indicator Background British Preliminary GDP is a key economic indicator, and provides an excellent indication of the health and direction of the British economy. Traders should pay close attention to the GDP ... (full story)