Microsoft (NASDAQ:MSFT)-backed OpenAI has become the most valuable startup in the world, worth about $500B after the company wrapped a secondary stock sale. The ChatGPT maker surpassed Elon Musk's SpaceX (SPACE) to take the top spot. Following is a list ...

Will the old ways of valuing a startup ever come back into vogue? For now, venture capitalists are relying on vibes https://t.co/v6WGvxJsHV ...