The Financial Post reports in its SpaceX gained for a fourth straight day, cementing the company's place among the world's most valuable stocks after it surpassed Amazon. A Bloomberg dispatch to the Post says shares of Elon Musk's rocket and AI firm rose as much as 6 per cent in early trading Wednesday, extending their rally since going public to 58 per cent. (However, SpaceX closed the day down $9.98 at $191.82 (all figures U.S.)). The company, officially Space Exploration Technologies Corp., became the fifth-largest stock in the world on Tuesday after overtaking Amazon and briefly topping Microsoft. The continued rally signals that there is still demand for the stock after its record initial public offering. That has helped ease some concerns that the market would have trouble absorbing large IPOs, especially with potential public offerings from artificial-intelligence competitors Anthropic PBC and OpenAI Group PBC expected by year's end. Both would likely be in the $1-trillion valuation range. SpaceX stock's run is "really not at all unexpected, especially with the fact that they had 30 per cent of the issue available for retail investors," said Brian Mulberry, chief market strategist at Zacks Investment Management.