The research firm says SpaceX has been significantly overvalued and warns investors to wait for better prices after the debut

SpaceX plans to go public as early as this month in what's expected to be the biggest IPO in history. Morningstar put the valuation at $780 billion.

June 2 : Morningstar analysts pegged SpaceX's valuation at $780 billion, less than half of what the Elon Musk-led company is reportedly targeting in its initial public offering,…

This assessment comes ahead of a planned roadshow scheduled for this week