Viacom Inc and CBS Corporation have completed their merger, first agreed in August. Shares in the new company, ViacomCBS, will begin trading on the Nasdaq Global Select Market in New York today. The merger reunites the CBS businesses including the CBS network, Showtime and CBS Studios with Viacom's stable of pay TV channels, the Paramount studios and international free-to-air services. Channels and Programming Intelligence will add coverage of the newly merged company from the start of next year.