Chicago Fed: Increased Economic Growth In April

 | May 22, 2017 09:07AM ET

"Index Points to Increased Economic Growth in April." This is the headline for today's release of the Chicago Fed's National Activity Index, and here is the opening paragraph from the report:

Led by improvements in production-related indicators, the Chicago Fed National Activity Index (CFNAI) rose to +0.49 in April from +0.07 in March. Two of the four broad categories of indicators that make up the index increased from March, and only one category made a negative contribution to the index in April. The index’s three-month moving average, CFNAI-MA3, increased to +0.23 in April from a neutral reading in March. [Link to News Release]

The previous two months were revised downward.

Background on the CFNAI

The Chicago Fed's background PDF file on the Chicago Fed's website. The index is constructed so a zero value for the index indicates that the national economy is expanding at its historical trend rate of growth. Negative values indicate below-average growth, and positive values indicate above-average growth.

The first chart below shows the recent behavior of the index since 2007. The red dots show the indicator itself, which is quite noisy, together with the 3-month moving average (CFNAI-MA3), which is more useful as an indicator of the actual trend for coincident economic activity.

For a broad historical context, here is the complete CFNAI historical series dating from March 1967.

The next chart highlights the -0.7 level. The Chicago Fed explains:

When the CFNAI-MA3 value moves below -0.70 following a period of economic expansion, there is an increasing likelihood that a recession has begun. Conversely, when the CFNAI-MA3 value moves above -0.70 following a period of economic contraction, there is an increasing likelihood that a recession has ended.

The next chart highlights the -0.70 level and the value of the CFNAI-MA3 at the start of the seven recession that during the timeframe of this indicator. The 1973-75 event was an outlier because of the rapid rise of inflation following the 1973 Oil Embargo. As for the other six, we see that all but one started when the CFNAI-MA3 was above the -0.70 level.

The next chart includes an overlay of GDP, which reinforces the accuracy of the CFNAI as an indicator of coincident economic activity.

Here's a chart of the CFNAI without the MA3 overlay — for the purpose of highlighting the high inter-month volatility. Consider: the index has ranged from a high 2.68 to a low of -5.01 with an average monthly change of 0.62. That's 8% of the entire index range! The latest reading is a month-over-month change of 0.42.

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Further underscoring the volatility is the roller-coaster list of CFNAI monthly headlines from 2015 forward.