In early 2024, Rivian lost the momentum it had built through 2023.Soaring 50% in 2023, Rivian (RIVN 2.51%) investors were surely excited after they cleaned up the New Year's Eve decorations and rang in 2024.But the past six months have largely been a letdown for the electric vehicle (EV) manufacturer's investors. Shares of Rivian plummeted 42.8% in the first six months of 2024, according to data provided by S&P Global Market Intelligence. The move is especially disheartening for Rivian investors in light of ...