The One Number Comcast Stock Investors Should Watch

The wireless phone service stands out at Comcast (CMCSA), and it may be what buyers of the stock are betting on. While Comcast is widely viewed as a cable company, wireless is where it is adding customers. Yet the stock has lost 23% over the past twelve months, while the S&P 500 returned 17.3%. That divergence presents a contradiction. So, how big has Comcast's wireless business become.