Using the Purchasing Managers' Index to assess the economy's strength and the likely direction of monetary policy

When economists are concerned that the economy may be about to change direction, one of the indicators to which they give special scrutiny is the Purchasing Managers’ Index (PMI), released monthly by the Institute for Supply Management. This article discusses the construction and interpretation of the PMI and presents evidence of its usefulness as an indicator of growth in the manufacturing sector and the economy as a whole, and as a predictor of changes in Federal Reserve policy. PMI values above 47 generally signal expansion in manufacturing, while the critical value for positive GDP growth is around 40. Over the past fifteen years, PMI values above 52.5 have tended to be associated with rising short-term interest rates.> When economists are concerned that the economy may be about to change direction, one of the indicators to which they give special scrutiny is the Purchasing Managers’ Index (PMI), released monthly by the Institute for Supply Management. This article discusses the construction and interpretation of the PMI and presents evidence of its usefulness as an indicator of growth in the manufacturing sector and the economy as a whole, and as a predictor of changes in Federal Reserve policy. PMI values above 47 generally signal expansion in manufacturing, while the critical value for positive GDP growth is around 40. Over the past fifteen years, PMI values above 52.5 have tended to be associated with rising short-term interest rates.>