What it measures
Gross domestic product is the total value of everything an economy produced in a period. It is reported as a growth rate — how much larger this quarter was than the last one, or than the same quarter a year earlier — and it is the number people mean when they say an economy is growing or shrinking.
Why the reaction is smaller than the number deserves
It is quarterly and it is late. By the time the figure arrives, the market has already seen three months of monthly data covering the same period — jobs, inflation, retail sales, surveys — and has formed a view. GDP mostly confirms what was already priced. Depth of measurement does not beat freshness of information.
It gets revised, twice
In the United States the first release is an early estimate, followed by revised figures as more data arrives. Revisions can be large enough to change the story, which is another reason markets treat the first print with less weight than its importance suggests.
Recession, and what the word actually means
The common shorthand is two consecutive quarters of shrinking GDP. It is a rule of thumb rather than an official definition — in the United States the dating is done by a committee that looks at several measures. Either way it is a backward-looking label, applied to a period that has already ended.
How to use it
As context for the direction a central bank is leaning, in the same sentence as inflation. Weak growth with high inflation is the hardest position for a committee to be in and often the most volatile period for that currency, because there is no comfortable answer and the guidance keeps changing.
In short
| Measures | The total value of what an economy produced |
|---|---|
| Frequency | Quarterly |
| Why the small reaction | Late, and mostly already priced |
| Revisions | The first figure is an estimate and moves |
| Recession shorthand | Two consecutive quarters of contraction |
| Best used | Alongside inflation, as context |
Common questions
Why did a bad GDP figure barely move the currency?
Because three months of monthly data had already told the market what to expect. GDP usually confirms rather than surprises.
Is two negative quarters really a recession?
It is a widely used rule of thumb. In the United States the call is made by a committee weighing several measures, so the label and the shorthand do not always agree.
Which matters more, GDP or CPI?
For currencies, inflation, because it acts on interest rates faster and arrives monthly. GDP is context.
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