The sale leaves Ford with about 86.9 million shares of Rivian, or a 9.7% stake, according to FactSet data. Rivian’s stock price sank earlier in the week following news of Ford unloading shares. They rebounded later in the week , after the startup stood by its previously lowered production forecast for 2022 and said it expected supply problems to ease. This year, Rivian shares have fallen sharply as the company has strained to roll out its first models amid supply-chain bottlenecks. Shares were down 74% through Friday, closing at $26.70. Ford first invested in Rivian in early 2019, part of a strategic partnership that included plans to co-develop an electric vehicle. That project eventually was scrapped and the companies now compete head-to-head in the fledgling market for electric pickup trucks. Rivian’s factory in Normal, Ill., where it produces the R1T pickup. The rise and fall of Rivian’s stock price […]