U.S. Regulator Halts Trading in Three Firms for Cryptocurrency Involvement ByAziz Abdel-QaderPRO INVESTOR Updated: 17 February 2018 DisclosureWe sometimes use affiliate links in our content, when clicking on those we might receive a commission – at no extra cost to you. By using this website you agree to our terms and conditions and privacy policy. SEC told the first blockchain ETFs in the last minute to tweak their names and erase the word ‘blockchain’