A daily reading of broad U.S. economic activity, blending six different data series into one composite number. Zero is normal; positive is expansion; negative is contraction.
The Aruoba-Diebold-Scotti (ADS) Business Conditions Index is published by the Philadelphia Fed and provides a real-time read on U.S. economic activity. It blends weekly jobless claims, monthly payrolls and industrial production, and quarterly GDP into one daily number. Zero represents historically average conditions. Positive numbers mean better-than-average; negative means worse. Sustained readings below −0.5 have preceded every U.S. recession since 1960.
The ADS Business Conditions Index is constructed by economists at the Federal Reserve Bank of Philadelphia. Named for its creators (Aruoba, Diebold, and Scotti), it solves a specific problem in macro: economic data comes at different frequencies, with different lags, and traditional summary measures only update quarterly.
The ADS index blends six different data series into one daily reading:
• Weekly: Initial jobless claims
• Monthly: Payroll employment, industrial production, personal income (less transfer payments), manufacturing and trade sales
• Quarterly: Real GDP
The result is a single daily number that incorporates all available data weighted by its informational value. Zero represents historically average conditions. A reading of +1.0 indicates conditions roughly one standard deviation better than average; −1.0 indicates one standard deviation worse.
The only publicly available index that blends weekly, monthly, and quarterly economic data into one daily number.
Most economic data has a fundamental problem: it tells you what already happened, with significant lag. GDP is published quarterly with at least a one-month delay. Monthly indicators publish a month after the reference period. By the time you have a clear picture from any single indicator, the situation has often changed.
The ADS index solves this by combining series of different frequencies, with the high-frequency data (jobless claims) providing real-time updates while the lower-frequency data anchors the longer trends. The result updates daily — you can see the economy’s direction shift before any individual indicator confirms it.
The ADS index is one of the few publicly-available real-time economic indicators that’s actually used by professional macroeconomists. The Federal Reserve uses similar models internally; the Fed of Philadelphia publishes this one for the public. When ADS readings turn sharply negative, it’s capturing the same signals that show up in private nowcasting models from places like the New York Fed, the Atlanta Fed, and major bank research desks.
A sustained reading below −0.5 has preceded every U.S. recession since 1960. This isn’t coincidence — the index is constructed specifically to capture the kinds of broad weakness that characterize recessions.
To know whether a reading is meaningful, you need to know where the indicator has been historically. Here's how the ADS Business Conditions Index has behaved through major moments since 1960:
The chart shows how negative readings cluster around recessions — every major contraction since 1960 corresponds to a sustained dip below zero. Brief negative readings happen often; what signals recession is when ADS stays below −0.5 for multiple weeks.
Click any tip to expand.
Positive readings mean conditions better than historical average. Negative means worse. The further from zero, the more extreme the deviation. A reading of +0.5 is solid expansion; −0.5 is solid contraction territory.
Daily readings can fluctuate based on a single noisy data point. The signal worth watching is whether the indicator stays below zero for multiple weeks. Sustained sub-zero readings, especially below −0.5, are what historically signal recession.
The index updates whenever new component data is released. The biggest update of the week typically comes on Thursday/Friday when jobless claims publish. That’s when meaningful directional changes usually appear.
A reading falling from +0.5 to 0.0 over four weeks is a meaningful deterioration even though the index is still neutral. Rate of change often leads level by weeks. Use a moving average to smooth the daily noise.
Three things people often get wrong about reading the ADS Business Conditions Index.
Because the index updates with new data releases, not on a calendar schedule. If no underlying component publishes during a week, the index stays unchanged. This is a feature, not a bug — it means the index moves only when there’s actual new information.
It incorporates jobless claims as one of its six inputs. MacroRead recognizes this overlap by reducing the weight of both indicators slightly when combining them into the composite score. The ADS index provides broader context; jobless claims provide focused signal on a specific labor dimension. They complement each other.
Recessions are defined retrospectively by NBER using qualitative judgment across multiple indicators. ADS captures a lot of the same data but is a single composite number, not a recession-dating mechanism. Sustained sub-zero readings are highly correlated with NBER recessions but not perfectly aligned.
The ADS Business Conditions Index is published and maintained by the Federal Reserve Bank of Philadelphia’s Real-Time Data Research Center. The full methodology paper by Aruoba, Diebold, and Scotti is available on the Philadelphia Fed website.
MacroRead fetches the index directly from the Philadelphia Fed’s published data file (XLSX format), updating daily.
Note: federal government shutdowns can occasionally delay updates to ADS because some component data (GDP, jobless claims) comes from federal statistical agencies. The Philly Fed posts a notice on their site when updates are affected.
ADS Business Conditions Index is one piece of a broader macro picture. These give complementary readings:
MacroRead tracks this indicator alongside nine others, all updated daily with normalized scores, historical context, and plain-English interpretation. No subscription required.
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