Wall Street stocks fell on Friday, capping a roller-coaster week for tech stocks as traders fretted that valuations may be entering bubble territory. This was in part caused by Elon Musk's rocket company SpaceX seeing its valuation drop from its IPO-day highs this week, pointing to a rockier landing zone for blockbuster public offerings on Wall Street.

Are investors starting to rethink their AI investments?

As technology stocks around the world tumbled and the Nasdaq plunged 1.5% in New York, the rocket and AI firm's shares fell as low as $147 in early trading.