The Dow Jones Industrial Average (DJINDICES: ^DJI ) is just one of several Dow Jones market trackers. The secular index will never invite any tickers from the railroading, airline, or electrical utilities industries -- because there are separate Dow indexes for these sectors.
If you want to track these industries, you'll have to look for the Dow Jones Transportation Average (DJINDICES: DJT ) or Dow Jones Utility Average (DJINDICES: ^DJU ) instead. There's even a composite index that brings all 65 tickers together.
In the video below, Fool analyst Anders Bylund explains why you'll never see Duke Energy (NYSE: DUK ) and its $48 billion market cap on the DJIA, nor the even larger Union Pacific (NYSE: UNP ) railroad.
Here's one great way to use the plain old Industrial Average
The Dow Jones Industrial Average may not track the entire market, but it's still a great starting point when you're looking for blue-chip companies with solid fundamentals. If you're interested in some long-term investing ideas, you're invited to check out The Motley Fool's brand-new special report, "The 3 Dow Stocks Dividend Investors Need." It's absolutely free, so simply click here now and get your copy today.