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Consumer Metrics Institute’s Growth Index: Signs of Recovery

Courtesy of Doug Short

Quick take: The CMI Daily Growth Index set its historic low around Memorial Day. The index has rebounded at a rather amazing pace. The index is still negative, but the rate of change is remarkable.


Since the consumer accounts for about 70% of the U.S economy, the Institute’s June 24 commentary on The BEA’s Third (and “Final”) Estimate of First Quarter 2011 GDP offers some insight on the differences between government’s measure of the economy and the CMI findings.

The first chart below illustrates the prolonged contraction since January of last year.


 

Background

For those unfamiliar with these data series, here is a link to the Institute’s website. Their page of frequently asked questions is an excellent introduction to the service.

The charts below focus on the ‘Trailing Quarter’ Growth Index, which is computed as a 91-day moving average for the year-over-year growth/contraction of the Weighted Composite Index, an index that tracks near real-time consumer behavior in a wide range of consumption categories. The Growth Index is a calculated metric that smooths the volatility and gives a better sense of expansions and contractions in consumption.

 

 

The 91-day period is useful for comparison with key quarterly metrics such as GDP. Since the consumer accounts for over two-thirds of the US economy, one would expect that a well-crafted index of consumer behavior would serve as a leading indicator. As the chart suggests, during the five-year history of the index, it initially lived up to that expectation. Actually, the chart understates the degree to which the Growth Index leads GDP. Why? Because the advance estimates for GDP are released a month after the end of the quarter in question, so the Growth Index lead time has been substantial. However, over the past several months the correlation has disappeared. One speculation is that the Federal Reserve intervention with the rumor and subsequent reality of QE2 has stimulated some components of the economy, but not the consumer.

 

 

Leading Indicator of the Market?

Has the Growth Index also served as a leading indicator of the stock market? It seemed to be during its first years of existence, but that has not been the case over the past year. The next chart is an overlay of the index and the S&P 500. The Growth Index clearly peaked before the market in 2007 and bottomed in late August of 2008, over six months before the market low in March 2009.

 

 

The most recent peak in the Growth Index was around the first of September, 2009. Since its peak, the Growth Index declined dramatically, entering contraction territory in mid-January of last year. The market showed signs of correcting in early 2010, which would approximate the lag for the earlier reversals. But that wasn’t to be the case.

The CMI Growth Index contraction appeared to have bottomed in early October 2010 and started reversing, but 2011 has seen a renewed contraction. In contrast, the market continued its rally to late April 2010, corrected during the summer months, and then returned to the neck-snapping velocity of the spring 2009 rate of recovery.

Theoretically the notion that discretionary consumption leads the market seems reasonable. But the disconnect since early 2010 undercuts this assumption. On the other hand, we are living through some unusual economic times. As I mentioned earlier, the disconnect is to some extent a result of the Federal Reserve’s quantitative easing (illustrated here).

The next chart compares the contraction that began in 2008 with the one that began in January of this year. I’ve added annotations for the elapsed time and the relationship of the contractions to major market milestones. Since we’re now at day 501 in the current contraction, I’ll either retire or redesign this chart in future updates.

Does the CMI Growth Index Provide A Comprehensive Snapshot of the U.S. Consumer?

In January Rick Davis, the founder of the Institute issued an important report on interpreting the index data: Reflecting Back on 2010 [Download PDF]. Davis essentially concludes that the index data is skewed toward a demographic of consumers who were more vulnerable to the economic downturn than the population as a whole.

By the third quarter we began to understand that the demographics of the consumers most likely to buy on-line were the same as those households most severely impacted by the recession. Unwittingly, some of the previously identified sampling biases in our data collection methodologies turned out to be much more significant than we might have suspected. Simply put, young and highly educated members of generations “X” and “Y” were particularly vulnerable to the hallmarks of this recession: entry level job losses and vanishing home equity.

In sum, we can’t take the CMI Growth Index as an indicator of the consumer economy as a whole, but it offers important insight into the health of a major subset of consumers. In fact, it is a demographic segment on which the future of the economy will become increasingly dependent. It seems difficult to imagine a sustained business cycle and long-term economic recovery while the CMI demographic sweet-spot continues to sputter in a year-over-year contraction.

 

 

 

 


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