As long as broadband subscribers don't grow again, Charter will likely continue to trade in a broad range, with frequent ups and downs. PM ImagesCharter's surprisingly resilient earnings cause short-covering rally As I have pointed out in my previous coverage of Charter Communications (NASDAQ:CHTR), the stock is no stranger to outsized post-earnings moves. This well-known fact obviously attracts lots of short-term speculators. Six months ago, there was some speculation on a positive earnings surprise whic ...