Longfin (Ticker: LFIN) shares briefly tumbled 13.5 percent and were trading 11 percent lower near $63.25 as of 10:29 a.m. ET. "If you are fortunate enough to get a borrow, indeed $LFIN is a pure stock scheme," Andrew Left's Citron Research said in a Monday morning tweet. "@sec_enforcement should ... from Google Alert - cryptocurrency https://ift.tt/2IVY2w6 via IFTTT https://ift.tt/eA8V8J