The $5.8 billion investment from Volkswagen is a major financial boost for Rivian, indicating strong confidence from a leading automaker. This news is likely to positively impact Rivian's stock price in the short term as it enhances the company's financial position and growth prospects.

Volkswagen's significant investment in Rivian demonstrates its strategic focus on expanding its presence in the electric vehicle sector. This move could enhance Volkswagen's market position and investor perception, potentially leading to a positive impact on its stock price.