According to @StockMKTNewz, Uber ($UBER) plans to invest up to $1.25 billion in Rivian ($RIVN) as part of an agreement to deploy up to 50,000 robotaxis by 2031. This strategic investment indicates Uber's commitment to expanding autonomous vehicle operations and Rivian's continued push into the electric vehicle and mobility sectors, with potential long-term implications for both companies' market growth.