• SpaceX's Starship test flight was aborted due to engine ignition failure.
• The company's stock fell 3.5% in premarket trading.
• Investors are closely watching SpaceX's rocket tests after its record-breaking IPO.
• A new launch attempt is planned for early next week.

This aborted test flight may indicate technical challenges for SpaceX's Starship program, which could impact investor confidence and the company's ability to meet its ambitious launch schedule. The incident suggests that SpaceX may need to address engine reliability issues, which could be a critical factor in the success of its future missions.