With that in mind, Viacom shares were up about 6% in early trading Feb. 4 but fell immediately after it was announced that Dauman had been named chairman. The stock closed at $45.34 on Feb. 4, up 1.5%, but continued its slide on Feb. 5 down 5% ($2.41 each) in early trading. Viacom stock was down 45% in 2015.