If you've been keeping an eye on Nio (NIO -1.68%) stock, you know it's been on quite the roller-coaster ride since its initial public offering (IPO). After soaring to an impressive high of $67 per share in early 2021, the stock has investors buzzing with excitement. But since then, the narrative has shifted.Amid the volatility, Nio is making strides in China's fiercely competitive electric vehicle (EV) market, which is poised for explosive growth, projected to grow by 16% annually by 2030.With the stock cur ...