Last Updated Jan 17, 2010 4:39 PM EST
Prosperity loves company, just as misery does, and the Dow has been more or less alone among major indexes in trying to surpass the interim highs set in mid-October. At the close on Thursday, the Dow sat a mere 0.9 percent below the Oct. 19 high, but the Standard & Poor's 500-stock index remained 2.9 percent lower than its high on the same day.
A market advance is more likely to have legs when smaller companies are outperforming, in part because their fortunes are more highly leveraged to economic growth. Sure enough, the Russell 2000 led the way during most of the rally this year, rising nearly 80 percent from the March low through the October high, compared to just over a 50 percent gain for the Dow.
The reverse is often true at tops. The Russell suffered greater falls in the early stages of the severe bear markets that began in 2000 and 2007, for instance. It's far too early to say that the comparative weakness of the Russell in the last few weeks heralds something similar, but it can't be a good sign.
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