Is Nio Stock a Buy Under $5 in 2025?

Nio (NYSE: NIO) has always been an intriguing stock for investors looking to get exposure to the blossoming electric vehicle (EV) industry. The dollar value any stock trades at is far less important than that figure's context -- its valuation metrics. In Nio's case, as the company has yet to reach profitability, the best metric an investor can use to gauge its valuation -- and weigh it against its peers -- is the price-to-sales ratio.