Follow Invezz on Telegram , Twitter , and Google News for instant updates >Tesla Inc (NASDAQ: TSLA) is trending down in extended hours on Wednesday after reporting disappointing results for its fourth financial quarter.What else is weighing on Tesla stock?Copy link to sectionThe stock is in the red because total gross margins took a 620 basis points hit in the recently concluded quarter. That metric printed at 17.6% versus 23.8% in the same quarter last year; part of the reason why Adrian Yanoshik – a Redbu ...