(Reuters) – Bill Hwang, Archegos Capital Management founder has requested a probe. Morgan Stanley (NYSE.) To find out if anyone from the bank has tipped off the outsiders about the company’s plans to purchase, Futu Holdings According to a Bloomberg News report, Tuesday’s stock of Ltd was purchased in large quantities.

Archegos had notified U.S. authorities about a quick squeeze on Futu. It took just $4 billion out Hwang’s portfolio. Bloomberg reported that Archegos contacted US regulators after they launched an investigation into block-trading at Morgan Stanley. Bloomberg also cited a person who was familiar with this matter.

Spokespeople of Morgan Stanley and Hwang didn’t immediately respond to Reuters requests for comment.

According to the U.S. Securities and Exchange Commission, they have been probing investment banking firm Investment Banking Group in February. They are looking into whether or not financial executives might have violated regulations by tipping off large-scale shares sales ahead of big hedge fund transactions.

Archegos was bankrupted last March after it lost heavily leveraged stock investments. Hwang ran a family office that defaulted on its margin calls. The loss of as much as $10 billion sent shockwaves down Wall Street.