Shares of Nio Inc. sank 4.1% in premarket trading Monday, after the China-based electric vehicle company reported October deliveries that fell 27.% from a year ago, as restructuring, upgrading of manufacturing lines and preparation of new products acted as drag. The company delivered 3,667 vehicles in October, consisting of 218 ES8 six- or seven-seater SUVs and 2,528 ES6 five-seater SUVs. Nio said given the restructuring and upgrade scheduled, ES8 production resumed toward the end of the month.