Bombardier shares drop 9% after Trump threatens Canada with aircraft tariffs, decertification

Bombardier shares ‍dropped 9% on Friday after U.S. ​President Donald Trump threatened to decertify the private jet maker's ⁠large-cabin planes "and all Aircraft made in Canada" and slap 50% import tariffs on new planes until Canada certified the latest aircraft produced by U.S. rival Gulfstream.