click for interactive version
Nice graphic and article explaining how only 5 stocks (of 30) in the Dow are the prime drivers of the rally, responsible for one third of the gains.
Before you go Oooh, consider the simple math of this. If every stock contributed equally to the Dow’s rise, than 10 stocks would be worth a third of gains. But as in typical collections of different items, there is a bell curve, a normal distribution.
Thus, it should come as no surprise that some stocks have contributed much more than others.
United Technologies 413.32
The full distribution of winners is losers are at the article.
Five Stocks Handled the Heavy Lifting
WSJ March 5, 2013