Nio Inc. (NYSE:NIO) shares moved little during Friday's premarket session as investors assessed fresh product updates and the recently-revealed European delivery news.The electric vehicle maker continues pushing new models and overseas expansion despite softer year-end demand conditions across global auto markets.The China-based automaker plans to unveil limited-edition versions of its ET5 sedan and ET5 Touring wagon next week, aiming to stimulate interest during a challenging sales period, according to CnE ...