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Autos Buckle Up For A Fall

10/21/04 08:19:57 AM
by Arthur Hill

The Auto Parts and Auto Manufacturing indexes are breaking down, and this entails an outsized move for the Auto Parts group.

Security:   DJUSSAP
Position:   Sell

Despite a sizable advance in 2003, the DJ US Auto Manufacturing Index (DJUSAU) has been trending lower since April 2000. Even though the index broke above the blue trendline, the January 2004 high is lower than the May 2002 high and the index recently broke the lower support line of a descending triangle (magenta trendlines).

In contrast, the DJ US Auto Parts Index (DJUSAP) has traded within a large range since March 2000. As the magenta trendlines show, there have been seven swings over this period and the current swing is down. The blue vertical lines correspond to the swing reversals or trendline breaks in the index. Note that these roughly correspond to advancing and declining periods in the Auto Manufacturing Index.

Figure 1: Dow Jones Auto Manufacturing vs. Dow Jones Auto Parts
Graphic provided by: MetaStock.
Graphic provided by: Reuters Data.
Even though these swings correspond, it is clear that the swings are much more pronounced in the Auto Parts Index, both up and down. When the Auto Manufacturing Index turned up, the Auto Parts Index moved above 220, 240, and 250. When the Auto Manufacturing Index turned down, the Auto Parts Index moved below 150 each time.

The relationship between these two groups is not hard to imagine. When business is good for Auto Manufacturing, the demand for parts increases. When business is bad for Auto Manufacturing, the demand for parts decreases. With the recent descending triangle support break, the Auto Manufacturing Index looks headed lower, and this would suggest another move toward support around 150 for the Auto Parts Index. So buckle up.

Arthur Hill

Arthur Hill is currently editor of, a website specializing in trading strategies, sector/industry specific breadth stats and overall technical analysis. He passed the Society of Technical Analysts (STA London) diploma exam with distinction is a Certified Financial Technician (CFTe). Prior to TD Trader, he was the Chief Technical Analyst for and the main contributor to the ChartSchool.

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