“Mumu the bull” is the mascot of the Bull Market.created on 4chan’s /biz/ board. Inspired by Apu Apustaja (like Bobo, the bear-market mascot), Mumu is depicted as Bobo’s rival in an ongoing battle over market direction. The character first appeared on July 13, 2018, in a /biz/ thread introducing a bull-market counterpart to Bobo.