Macroeconomicsbeginner

What is GDP?

How a country's output is measured — and what it tells markets.

Live data

Real GDP growth (QoQ annualised)

1.60%+23.1%

Latest: 2026-01-01

Data: FRED

40 obs

Source: Federal Reserve Economic Data (FRED). Updated daily.

TL;DR

GDP (Gross Domestic Product) is the total dollar value of all goods and services produced in a country over a period. It's the broadest measure of economic activity — how fast the economy is growing.

How it's measured

GDP is measured three ways that should reconcile. The expenditure approach is the most commonly reported.

→C — Consumer spending (~68% of US GDP)
→I — Business investment (~18%)
→G — Government spending (~17%)
→NX — Net exports (typically negative for the US)

Nominal vs real

Always check which version is being reported.

→Nominal GDP — current-dollar value, includes inflation
→Real GDP — adjusted for inflation, measures actual output growth
→Real GDP growth is what matters for living standards and policy

What markets watch

GDP is released quarterly (with three revisions over the following months). Markets care about the deviation from forecasts, especially in turning points: above 3% sustained growth is hot; below 1% sustained is recession territory.

Worked example

Reading a GDP print

Q3 advance GDP estimate consensus was 2.5% annualised. Actual prints at 2.8%.

1Consensus2.5% QoQ annualised
2Actual2.8%
3Surprise+0.3pp — modest upside
4Consumer spending contribution1.8pp (strong consumer)
5Business investment0.6pp
6Market reactionUSD +0.2%, yields +3bp, S&P unchanged

Takeaway

GDP surprises move yields and the dollar more than equities — equities care about earnings growth, which is correlated but not identical.

Common mistakes

What to avoid

!Treating quarterly GDP as a real-time gauge — it's a backward-looking estimate, revised twice
!Comparing nominal GDP across countries without adjusting for purchasing power or currency
!Ignoring the components — strong consumer alongside weak investment tells a different story than the reverse
!Calling a recession after one quarter of negative growth — the NBER uses a broader definition

Self-check

Test yourself

Q1What's the difference between nominal and real GDP?+

Real GDP is adjusted for inflation; nominal isn't.

Q2Which GDP component is largest in the US economy?+

Consumer spending — roughly two-thirds of total GDP.

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