The autonomous vehicle stock is still a divisive investment.Luminar Technologies (LAZR -3.46%), a developer of commercial automotive lidars, went public by merging with a special purpose acquisition company (SPAC) four years ago. The combined company's shares opened at $354.75 on the first day, soared to a record high of $627 just five days later, but now trade at about $6.Luminar's stock initially skyrocketed as it dazzled investors with its long-term forecasts. The buying frenzy in meme stocks -- which wa ...