September's best tech performer on the Dow was Verizon Communications (VZ 0.90%). Shares rose around 6%, driven largely by anticipated demand for Apple's (AAPL -1.22%) iPhone 5. Verizon and rival AT&T (T 1.10%) share an effective duopoly in the telecom space, but the former has a strong advantage, with coverage in 317 cities for its 4G LTE. This already covers nearly 75% of the U.S. population, and by the end of the year they plan to grow that number to an estimated 400 cities.

Contrast that with AT&T, which has 65 major markets and plans to expand to only 100 this year. Sprint (S), the No. 3 U.S. carrrier, has a mere 19 markets under coverage but has stated ambitious expectations to add an additional 100 by year's end.

For the full story, check out the video below.

If you're looking for some long-term investing ideas, you're invited to read the Fool's brand-new special report: "The 3 Dow Stocks Dividend Investors Need." It's absolutely free, so just click here to claim your copy today.