A Comcast Xfinity store in San Francisco, California. Comcast Corp. shares fell after the cable and media company reported its 10th straight quarter of losses in broadband customers and said it doesn’t expect the trend to turn around in the near future. Philadelphia-based Comcast shed 104,000 net broadband subscribers in the third quarter, though that was fewer than the loss of 140,000 predicted by analysts. In the connectivity unit that includes broadband, Comcast’s biggest by far, revenue fell 1.4% and ...