At current prices of around $21, Rivian trades at a PS ratio of 7x, which is considered an expensive multiple for a vehicle manufacturer. However, this does not necessarily mean that Rivian stock is overpriced. Whether the stock is fairly valued or not depends on its expected financial performance, future prospects, and the overall market conditions. Rivian is a relatively new company and is still unprofitable. However, it has a number of advantages, such as its focus on adventure vehicles and its strong management team. Moreover, the electric vehicle market is growing rapidly, and Rivian is well-positioned to capitalize on this growth. Whether Rivian stock is a good investment depends on its financial performance in the upcoming quarters and whether it meets its production goals.