SpaceX IPO could attract massive global inflows, potentially financing 8% of the U.S. current account deficit in one day.

"Selling flows in recent winners and levered products from retail to invest in SpaceX could be very large."

SpaceX plans to allocate 30% of its IPO to retail investors, drawing tens of thousands of European registrations and reviving public market enthusiasm.

OPINION: Investors weigh record SpaceX valuation ahead of listing.