Nio Inc. (NYSE: NIO) shares surged 6.9%, closing at $16.95, following the company's filing of its 20F annual report for the fiscal year ending December 31, 2021. Despite recovering from recent production halts in Shanghai, Nio's stock has faced significant volatility, losing almost 17% in value over the past month. While the company's fundamentals remain solid, investors are cautious, reflected in a Zacks Rank of #4 (Sell).