ToplineShares of Ferrari plummeted in European and U.S. trading on Thursday, pacing what would be the luxury automaker’s worst day yet in both markets after unveiling updated guidance for earnings that fell well below analyst expectations. The luxury automaker also scaled back expectations for its new electric vehicle business. Getty ImagesKey FactsFerrari’s shares fell more than 13% to around $414 on the New York Stock Exchange as of around 11:40 a.m. EDT, marking what would be the largest single-day decli ...