PTE -15% on SEC investigation: https://www.cnbc.com/2019/03/18/biotechs-shares-tumble-after-it-says-sec-is-looking-into-possible-manipulation.html I’m on record that I think this company is a scam (e.g. https://www.siliconinvestor.com/readmsg.aspx?msgid=31786923 ).