Alphabet Hits $4 Trillion Market Cap as UK Regulators Launch Formal Probe into X Platform

On January 13, Alphabet surpassed a $4 trillion market capitalization, ranking among the top 20 most actively traded stocks on U.S. exchanges. Tesla rose 0.89%, with trading volume reaching $27.517 billion, making it the most heavily traded stock of the day. On the same day, the UK’s communications regulator, Ofcom, announced it had launched a formal investigation into X, the social media platform owned by Elon Musk, under the Online Safety Act. The probe will focus on whether X has effectively fulfilled its legal obligations to protect UK users from illegal content. Ofcom emphasized that the investigation would be treated as a “top priority” and warned that, in the most severe scenarios, it would not rule out blocking access to the X platform.