An anonymous reader writes: Cord cutting is not a new concern for the pay TV business but a recent massive sell-off in media stocks has many in the industry worried. Cable, satellite and TV companies suffered their worst-ever quarterly subscriber declines losing more than half a million accounts, sending stocks tumbling. Researchers say this may be the beginning of the end for the pay TV business. According to analysts Craig Moffett and Michael Nathanson: "A year ago, the Pay TV sector was shrinking at an annual rate of 0.1 percent. A year later, the rate at which the Pay TV sector is declining has quickened to 0.7 percent year-over-year. That may not seem like a mass exodus, but it is a big change in a short period of time. And the rate of decline is still accelerating."