What GDP measures
Gross Domestic Product is the total monetary value of all goods and services produced in an economy over a period of time. It's the broadest measure of economic output and the foundation of the economic cycle framework most macro traders use.
GDP growth above potential (around 2-2.5% for the US) suggests an overheating economy that may need higher rates to cool. GDP growth below potential suggests slack — room for stimulus. Negative GDP for two consecutive quarters is the classic (though not official) definition of recession.
GDP is reported quarterly with significant lag — Q1 GDP comes out in late April, with two revisions through July. Because it's backward-looking and comes out infrequently, markets don't react to GDP itself as much as they react to the real-time leading indicators that predict where GDP is going.
GDP is a lagging indicator. By the time you have a negative GDP print, markets have usually already moved. The yield curve, PMI surveys, and credit spreads are leading indicators that give you advance notice of GDP direction.
PMI surveys and real-time tracking
The ISM Manufacturing and Services PMI surveys are released monthly and give the most real-time read on economic activity. A PMI above 50 signals expansion; below 50 signals contraction. These surveys come out before GDP data and closely track actual economic output.
The Atlanta Fed's GDPNow model provides a real-time GDP estimate that updates as new data comes in throughout the quarter. Markets watch GDPNow because it gives a continuously updated picture of where the official GDP print is likely to land.
Regional Fed surveys (Empire State, Philadelphia Fed, Chicago PMI) add granularity, showing which parts of the country are expanding or contracting first. Manufacturing sectors tend to lead services in cycle turns.
Trading around GDP
GDP data itself rarely moves markets dramatically because it's too backward-looking and widely anticipated. But surprises matter — a GDP print significantly above or below expectations can reprice rate expectations and move indices.
The more actionable trade is positioning ahead of GDP based on leading indicators. If PMI surveys have been strong, jobless claims low, and consumer spending data healthy for the quarter, the GDP beat is likely already in the price. The edge is in reading the leading indicators correctly before consensus catches up.
Recession trades (short equities, long bonds, long gold, short cyclicals) work best when entered during expansions before the data officially confirms recession — because by confirmation, the move is nearly complete.