SEMI data tracks US chip fab spending amid official reporting lags
Official US economic data fails to track semiconductor fab investment in real time due to broad categories and publication lags, according to a Federal Reserve study. Researchers find that project-level data from SEMI provides an accurate, timely supplement.
Project pipelines expose the official gap
Federal Reserve economists David M. Byrne, Robert Kurtzman, and Heidi L. Williams analyzed why official metrics fall short during the semiconductor construction boom.
Aggregate datasets from the Bureau of Economic Analysis and Census Bureau bundle chip fabrication plants into broad categories such as NAICS 334 or industrial machinery.
While monthly Value of Construction Put in Place data showed a tenfold increase in electronic manufacturing construction between 2021 and 2023, it blended fab projects from TSMC, Intel, and Micron with battery plant construction.
In contrast, SEMI World Fab Forecast data tracks specific plants quarterly with a ten-week lag, matching Census establishment benchmarks.
Divergence in structures and equipment
Comparing SEMI data with Census survey figures through 2023 reveals consistent overall investment levels but a marked divergence in composition.
SEMI attributes a higher share of outlays to building structures rather than machinery, reflecting distinct definitions and accounting treatments for cleanroom facilities.
Looking ahead, SEMI projects US fab investment through 2027 by tracking announced projects with at least a 50 percent completion probability.
This bottom-up pipeline provides visibility into domestic capacity additions supported by the CHIPS Act of 2022.
Granularity beats lagged aggregates
Official macroeconomic data is too slow and broad to evaluate targeted industrial policy.
Project-level industry tracking solves the latency deficit but introduces classification risks.
Central banks and fiscal authorities should embrace commercial trackers as vital operational tools.