OpenAI is pulling U.S. markets higher while staying private and unprofitable. According to CNBC, Sam Altman’s artificial intelligence company is now valued at $500 billion and has been signing contracts worth tens to hundreds of billions of dollars even as it burns cash. Those deals have already pushed the Nasdaq and S&P 500 to record highs this week after Nvidia agreed to invest up to $100 billion in OpenAI. That agreement came right after a $300 billion deal between OpenAI and Oracle in July under the Stargate program, a $500 billion infrastructure project also funded by SoftBank.