SpaceX's IPO raised $85.7 billion after underwriters exercised a greenshoe option, driven by overwhelming investor demand and significant stock gains post-market debut.

SpaceX shares surged 19% on their Nasdaq debut after the company raised $75 billion in the largest IPO ever, pushing Elon Musk's net worth past $1 trillion.

Elon Musk's aerospace company raised a whopping $75 billion by selling 555.6 million shares, or about 5% of its stock, in Friday's much-awaited market debut. However, in the weeks…