The last year was a tough one for auto parts suppliers in general, particularly after midyear and especially for European suppliers, but it was an abysmal year for Valeo (VLEEY) [VLOF.PA] as the shares lost about half their value on successive miss-and-lower quarters that eventually saw management's outlook for 2019 erode from double-digit growth to low single-digit growth with lower margins.
I don't believe that Valeo is fundamentally broken, but investor confidence in management clearly is, and I can't say that that is unfair. The magnitude of the guidance revisions has been significant,