Six of the United States' largest cable and satellite TV distributors lost a collective 580,000 customers during the second quarter of 2011, Bloomberg reported Wednesday. The news services said the loss marked “the biggest such decline in history.” The companies that lost subscribers included Comcast Corp., Time Warner Cable Inc., Charter Communications Inc., Cablevision and Dish Network Corp., Bloomberg said. DirectTV added customers during the quarter. Subscriber losses are attributed to increased competition from AT&T Inc. and Verizon Communications Inc., which added subscribers during the period; unemployment and a slowing economy; and competition from streaming services such as Hulu LLC and Netflix Inc. Lower-income subscribers are cancelling their service and many younger people, faced with a poor job market, are moving in with parents or family, which is reducing the number of potential customers. "Rising prices for pay TV, coupled with growing availability of lower-cost alternatives, add to a toxic mix at a time when disposable income isn't growing," Craig Moffett, an analyst at Sanford C. Bernstein in New York, told Bloomberg. "For younger demographics, where in many cohorts unemployment is north of 30 percent, and especially for those with limited or no interest in sports, the pay-TV equation is almost inarguably getting less attractive."