British Second Estimate GDP indicator is a measurement of the production and growth of the economy. Analysts consider GDP 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 Thursday at 8:30 GMT. Indicator Background British Second Estimate GDP is released quarterly, and the GDP reports are highly anticipated by the market. An unexpected reading can have an immediate impact on the movement of GBP/USD. The markets had their first look at GDP figures for Q1 with ... (full story)