Fool.com contributor Parkev Tatevosian compares Rivian (RIVN -0.44%), Tesla (TSLA -4.29%), and Nio (NIO 4.92%) across critical financial metrics, including their latest production numbers, to determine which is the best stock to buy now.

*Stock prices used were the afternoon prices of Oct. 9, 2023. The video was published on Oct. 11, 2023.