Investors are keeping a close eye on Nio (NYSE:NIO) stock today after the Chinese electric vehicle (EV) maker announced a new deal with Chinese state-owned FAW Group for battery-swap services.Indeed, per the new strategic cooperation framework agreement signed May 21, Nio and FAW will work toward the shared establishment of “battery technology standards,” develop model-swappable batteries and further enhance their battery management networks.FAW represents the seventh battery-swapping partnership for Nio, c ...