Subscriber OnlyMarketsDealsCBS and Viacom Work Through Night to Hammer Out DealDeal was expected Monday, but now looks to slip to TuesdayTwo sides have been negotiating over the exchange ratioDeals Report: CBS-Viacom Talks, WeWork IPO FilingByNabila Ahmed, Ed Hammond, and Lucas Shaw+FollowAugust 12, 2019, 4:33 AM UTCUpdated onAugust 12, 2019, 11:38 PM UTCCBS Corp. and Viacom Inc. are keeping investors waiting.The media giants were expected to announce a merger as soon as Monday, the culmination of years of on-again, off-again discussions. But the negotiations have dragged on, setting the stage for another day of anticipation.