Nio ( NIO ) – Get NIO Inc. Sponsored ADR Class A Report shares traded sharply higher Thursday after the China-based Tesla ( TSLA ) – Get Tesla Inc Report rival was upgraded to 'buy' at Goldman Sachs. Goldman Sachs analyst Fei Fang lifted his rating on the electrified carmaker to 'buy', from 'neutral', while leaving the company's price target unchanged at $56 per share, noting that the Shanghai-based group had lost $28 billion in market cap since peaking in July. "We believe Nio’s positioning of the ET7 is strategic. The product design, such as the wheelbase, is in the…