Microsoft Corporation's (NASDAQ:MSFT) $10-billion investment in OpenAI, the parent company of ChatGPT, is potentially facing probes by the U.S. Department of Justice and the Federal Trade Commission over antitrust concerns. The agencies are discussing which one should investigate the partnership, as both have shown interest and do not want to relinquish jurisdiction. The deal was not reported for antitrust review, and the hiring of OpenAI's CEO by Microsoft has raised additional concerns. The FTC is also investigating OpenAI over consumer privacy issues, while the UK's Competition and Markets Authority and the European Commission have expressed antitrust concerns. Microsoft's stock is trading at all-time highs, reflecting the success of its AI investments.