SEC places Chinese crypto mining rig maker Canaan on pre-delisting list The Securities and Exchange Commission (SEC) said it determined that Canaan used an auditor whose working papers cannot be inspected or investigated completely by the Public Company Accounting Oversight Board (PCAOB). See related article: Canaan to buy back up to $100M shares to drive value Fast facts - The SEC Wednesday said it is placing 88 Chinese companies, including Chinese mining machine maker Canaan Inc., on a [pre-delisting list] . - Canaan Inc. has until May 25 to dispute the identification. - Canaan’s [stock price] is down some 3.8%...