Rivian stock performed very well in 2025. Next year could bring more gains.Shares of Rivian Automotive (RIVN 1.16%) languished for most of 2025. From Jan. 1 to Nov. 1, the company's stock price barely budged, although there were sporadic ups and downs along the way. Over the past month or so, however, shares have skyrocketed in value by more than 40%.I have been urging investors to take a closer look at Rivian stock all year. In many ways, the company appears to have the potential to become the next Tesla. ...