The observation prompted push back in the blogosphere and on Twitter. A typical example came from Josh Brown, who said that the Transports don't matter much anymore as the character of the stock market had changed since Charles Dow first wrote about the Dow Theory.
However, Nautilus Research found that negative divergences of the SPX with the Transports were bearish, though the sample size was very small:
Mark Hulbert more or less said the same thing:
How bearish is this divergence? To come up with an answer, Jack Schannep recently focused on periods over the past 25 years that included big divergences. Schannep is the editor of a market-timing advisory service called TheDowTheory.com.Notwithstanding the bearish analysis from Nautilis and Schannep, I would philosophically inclined to agree with the naysayers about the importance of the Transports. No indicator is perfect, particularly an indicator as old as the DJIA-DJTA link. Technical indicators have to be viewed as part of a mosaic and the analyst has to see what the big picture is telling him.
Schannep found 14 such instances. In nine of them, he says, the broad market subsequently dropped by less than 10%. But in the remaining five cases, the stock market’s eventual decline averaged 25.7%.
Those are sobering odds. If we average all 14 instances of prior divergences similar to the current one, the market eventually fell more than the 10% threshold for a correction. If that turns out to be the case this time around, it would be the first correction since 2011.
Even more ominous is that in five of the 14 cases, or more than a third of the total, the divergences presaged a full-scale bear market. In fact, Schannep points out that when the broad market hit its bull-market highs in 1990, 1998, 2000 and 2007, the Dow Transports in each case had already turned down several months before.
The comparison of the DJTA with the DJIA is a well-known technique of looking for breadth confirmation of a move. So why all the hate? Good technical analysts need to consider the big picture on indicators like breadth. Even as the SPX achieved new highs on Thursday at Friday, indicators like RSI and % above the 50 dma remain range bound, indicating a lack of momentum. In addition, % on point and figure buys is in a downtrend showing a negative divergence.
Weakness in the Transports is only one data point. On the other hand, when you look at the big picture on breadth and momentum, does how much confidence would you have about the all-time highs achieved by the SPX?