If you've been waiting for the triumphant return of XIV and TVIX only better you're in luck because the loooooooong delayed -1x inverse SVIX and 2x long UVIX have finally been officially listed.
https://www.yahoo.com/now/volatility-shares-launches-2x-long-131400266.html
https://www.yahoo.com/now/volatility-shares-launches-2x-long-131400266.html