William Galvin, Massachusetts' top securities regulator, has subpoenaed former MassMutual broker Keith Gill to testify about the Reddit GameStop squeeze.
A spokesperson for Galvin's office confirmed to ThinkAdvisor Thursday that Galvin's office sent a subpoena to Gill late Monday.
The spokesperson added that "This is a standard review of Mr. Gill's registration. I don't have any further information on the investigation right now."
Gill, known as "Roaring Kitty" on YouTube, played a key role in the trading frenzy surrounding video game retailer GameStop and other stock the week of Jan. 25.