'Halftime Report' Traders Weigh In On Slack, CBS And Alibaba

Josh Brown revealed on CNBC's "Fast Money Halftime Report" he no longer owns Slack Technologies Inc WORK. He has been in a position for a while and it has been one of the worst-performing software names in the whole market. He sees the trade as a mistake, but he likes the company and the product. He has no plans to re-buy it now.

Jim Lebenthal thinks ViacomCBS VIAC is going to be in the high $30s by the end of the year, just on the basis of its streaming business alone. He advised a viewer who bought the stock in May and has a huge gain, to trim position a bit. Lebenthal is long and he is not selling.

Karen Firestone likes Alibaba Group Holding Ltd - ADR BABA. She said it's a dominant e-commerce player in China.