Rivian Automotive (RIVN 13.42%) shares have plunged more than 50% year to date. Much of that stemmed from investor disappointment when the management's 2024 outlook revealed the company doesn't see any potential for production growth compared to last year.But one Wall Street firm just initiated coverage on the the electric vehicle (EV) start-up saying the stock's drop now makes Rivian a buying opportunity. Jefferies analyst Philippe Houchois started coverage of the EV maker with a buy rating and a price tar ...