Financial Times: U.S. media execs could be forgiven for feeling a pang of déja-vu. Just six months after a slump erased $37 billion from the stock market value of the biggest media companies in a single day, the sector has suffered another bruising few days of anxiety as investors reassessed the value of cable and satellite television. Shares in Time Warner, Viacom, CBS and 21st Century Fox were all hit.