ISM Manufacturing Index: Expansion In May For Third Consecutive Month

manufacturing growthJill Mislinski:   Today the Institute for Supply Management published its monthly Manufacturing Report for May.

The latest headline PMI was 51.3 percent, an increase of 0.5 percent from the previous month and above the Investing.com forecast of 50.4.

Here is the key analysis from the report:

“The May PMI® registered 51.3 percent, an increase of 0.5 percentage point from the April reading of 50.8 percent. The New Orders Index registered 55.7 percent, a decrease of 0.1 percentage point from the April reading of 55.8 percent. The Production Index registered 52.6 percent, 1.6 percentage points lower than the April reading of 54.2 percent. The Employment Index registered 49.2 percent, the same reading as in April. Inventories of raw materials registered 45 percent, a decrease of 0.5 percentage point from the April reading of 45.5 percent. The Prices Index registered 63.5 percent, an increase of 4.5 percentage points from the April reading of 59 percent, indicating higher raw materials prices for the third consecutive month. Manufacturing registered growth in May for the third consecutive month, as 14 of our 18 industries reported an increase in new orders in May (down from 15 in April), and 12 of our 18 industries reported an increase in production in May (down from 15 in April).”

Here is the table of PMI components.

The ISM Manufacturing Index should be viewed with a bit of skepticism for for various reasons, which are essentially captured in Briefing.com’s Big Picture comment on this economic indicator.

This [the ISM Manufacturing Index] is a highly overrated index. It is merely a survey of purchasing managers. It is a diffusion index, which means that it reflects the number of people saying conditions are better compared to the number saying conditions are worse. It does not weight for size of the firm, or for the degree of better/worse. It can therefore underestimate conditions if there is a great deal of strength in a few firms. The data have thus not been either a good forecasting tool or a good read on current conditions during this business cycle. It must be recognized that the index is not hard data of any kind, but simply a survey that provides broad indications of trends.

The chart below shows the Manufacturing Composite series, which stretches back to 1948. The eleven recessions during this time frame are indicated along with the index value the month before the recession starts.

ISM Manufacturing

For a diffusion index, the latest reading of 51.3 indicates expansion and the third above 50 in nine months. What sort of correlation does that have with the months before the start of recessions? Check out the red dots in the chart above.

How revealing is today’s 0.5 point change from last month? There are 821 monthly data points in this series. The absolute average month-to-month point change is 2.0 points, and the median change is 1.5 points.

Here is a closer look at the series beginning at the turn of the century.

Since 2000

To reiterate the Briefing.com assessment: “The data have thus not been either a good forecasting tool or a good read on current conditions during this business cycle.”

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