Pennsylvania Coincident Economic Activity Index

What this measures — and why it matters in Philadelphia

The Philadelphia Fed distills four monthly labor-market series — nonfarm employment, average manufacturing hours, the unemployment rate, and inflation-adjusted wage and salary payments — into one index of current economic activity for Pennsylvania. It is built so its long-run trend matches the state's GDP trend, making it the closest thing to a monthly GDP reading for the commonwealth.

Because it is a composite of hard data rather than a survey, it moves smoothly — which makes direction unusually meaningful. A rising line says the state economy is expanding right now; a flattening or falling line, sustained for a few months, has historically been one of the cleaner recession signals available at the state level. Economists use exactly these state coincident indexes to date regional cycles.

For a Philly investor the practical use is context: the city can outrun or lag the state, and comparing THE INDEX's weekly signal against this monthly state gauge tells you whether Philadelphia's momentum is local or just the regional tide. The level of the index is an abstraction; the slope is the story.

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