Posts filed under “Data Analysis”

The Car Dealer Doldrums Indicator

What are Car-Sales Saying About a Recession? According to Floyd Norris of the NYT, potentially alot.

In his column in today’s Times, Norris shows the chart below. It reveals the year-over-year rate of change in sales by new-car
dealers on a trailing 12 month basis (adjusted for inflation) — and compares them with recessions.

According to Norris, there is a surprisingly positive correlation when the figure is a negative 2% or greater. The  indicators suggests a recession is either "under way or set to begin
within a few months." According to the chart, it has never warned of a recession that did not occur:

Trailing 12 Month New Car Sales, US, Year-over-Year

Graphic courtesy of NYT


The rule — unveiled here for the
first time — is that if the figure is down 2 percent or more, a
recession is either under way or set to begin within a few months. The
figure fell to a negative 2.4 percent when June sales figures were
released last week by the Census Bureau.

If things are miserable for America’s new-car dealers, can a recession
be averted? History says it cannot and suggests a downturn may have
already begun.

The available data go back to 1968, a period in which the American economy has recorded six recessions. The “dealer doldrums indicator,” as we will call it, called five of them, missing the 1981-82 recession only because it was not persuaded that the 1980 downturn had ever ended. It has never warned of a recession that did not occur.

The risk of using 12-month figures is that by the time bad news is clear from new-car sales, it can be overwhelmingly obvious from other economic indicators. But such long periods avoid the possibility of false readings because of the volatility of new-car sales.

The chart measures all sales by new-car dealers, which is how the retail sales statistics report the data. So it includes their revenue from used-car sales, parts and service. But it does not include sales by dealers who sell only used cars or repair garages that are not also car dealers.

Norris states that the "Dealers are hurting. The rest of us may soon share their pain."


Update, August 19, 2006 3:06pm

Dan Gross points us to another transportation warning:

The Yacht Indicator!


A Car-Sales Indicator Suggests a Recession Is Near or Already Here
Floyd Norris
NYTimes,  August 19, 2006

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