$FB The popular financial blog Zero Hedge emerged from a three-day Facebook ban Tuesday, which the social network reportedly called "a mistake." The bearish, markets-focused blog apparently noticed its content was being blocked Monday, two days into it. The blog does not have a Facebook page, but its articles were unable to be shared by Facebook users. The decision "surprised us," Zero Hedge said in a blog post Tuesday night "Not only do we not have an official Facebook account, but Facebook did not approach us even once with a warning or even notification."