(New York)

One of the oldest form of analysis of the Dow is sending a pretty grave signal at the moment. The Dow Theory, which has been around for more than a century, contend that if the Dow Jones Industrial Average or the Dow Jones Transportation Average reaches a new high, the other must follow quickly in order to confirm a bullish outlook. Well, despite the core index’s gain, the Transportation Average has been lagging badly, sliding 3.59% in a single day last week.

FINSUM: Okay a couple thoughts here. The first is that the structure of the economy is different now, such that the relationship between growth and Transportation is not the same as it has been over the last century. Outside that though, logistics tends to expand at multiples of underlying growth, so this still feels worrisome.