AT&T's Fiber Investment Is Turning Into a Home Run

While the wireless business is the largest contributor to AT&T's (T 0.64%) revenue by far, the fiber internet business is proving to be a potent growth opportunity. Capturing that growth comes at a cost: Building out a fiber network is capital-intensive, requiring vast outlays with no guarantee that consumers and businesses will sign up for service.AT&T operates a vast legacy wireline network that serves consumers and businesses, but that business is in perpetual decline. Even the company's non-fiber broadb ...