Nio's good days may have just started.Every stock tells a story, but Nio's (NIO -8.47%) is the kind you'd want to grab the popcorn for. The Chinese electric vehicle (EV) stock was having a dismal 2024 until last month when it staged one of the most dramatic comebacks -- after plunging 55.5% in the year through August, Nio stock gained a whopping 65.3% in September alone, according to data provided by S&P Global Market Intelligence.I was confident about Nio stock's recovery in the second half of 2024 and bel ...