US stocks fall as report of OpenAI IPO delay causes jitters

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.