币界网报道:OpenAI has issued a public warning against unauthorized attempts to sell its private shares, following reports that some investors were misled into buying purported OpenAI equity through third-party brokers. The AI firm clarified it has not authorized any secondary market transactions and is not currently engaged in fundraising activities. This comes as Robinhood Markets launched a new service allowing accredited investors to trade pre-IPO shares of tech companies like OpenAI, though Robinhood stated it thoroughly vets all offerings. The incident highlights growing concerns about opaque private share markets as investors seek exposure to hot AI startups before potential public listings.