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US Monthly GDP (MGDP) Index

Our Monthly GDP (MGDP) Index is an indicator of real aggregate output that is conceptually consistent with real Gross Domestic Product (GDP) in the National Income and Product Accounts (NIPA). Our approach uses calculation and aggregation methods comparable to the official GDP from the U.S. Bureau of Economic Analysis. As a result, you receive a monthly index whose variation at the quarterly frequency mimics that of official GDP, and whose intra-quarter variation is a meaningful and comprehensive measure of monthly changes in output.

  • Timely and current
  • Comprehensive
  • More frequent
  • Meaningful
  • Granular



We calculate the MGDP in two steps. First, we derive a raw index from various monthly data, most of which is source data that BEA uses to calculate official quarterly GDP. Second, we calculate a monthly residual that reconciles the raw index with official GDP at the quarterly frequency. We provide MGDP data and historical files to the public at no charge. Please contact us if you need to access our archives of the MGDP.  

Additional Coverage

In addition to MGDP, we calculate monthly measures of several NIPA aggregates:

  • Final sales of domestic product
  • Final sales to domestic purchasers
  • Final sales to private domestic purchasers
  • Gross private domestic investment
  • Fixed investment
  • Nonresidential fixed investment
  • Residential investment

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