Can Do Future on Rump/Stub

Anyone ever done a structured future on the rump/stub of a company? I am looking at doing this on the Naspers rump. Basically the trade would be long Naspers and short Tencent. The rump/stub is trading negative and looks really cheap. The discount between Naspers and Tencent is narrowing.Could make decent money on the trade. Thoughts? Anyone modeled risk exposure for something like this?