China launches an antitrust investigation into Alibaba as its crackdown on Jack Ma's tech empire continues

• Chinese regulators announced measures to crack down on Jack Ma's Alibaba and Ant Group on Thursday.
• Beijing will investigate e-commerce site Alibaba, co-founded by Ma, over alleged anti-monopolistic practices, and urge fintech Ant Group to implement stricter financial regulations, regulators said.
• Ant Group's IPO, which would have been the world's biggest-ever, was halted in November after China introduced stricter regulations for financial services.
• It's the latest sign of China's efforts to scrutinize big tech firms.
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China is cracking down on Jack Ma's ever-growing tech empire.

Chinese regulators said Thursday they had launched an anti-monopoly investigation into Alibaba, the nation's biggest tech company, and separately, other watchdogs said they would hold talks with Alibaba's affiliate fintech company Ant Group. It's yet another sign of the nation's increased scrutiny of tech giants.

Ma is the cofounder of Alibaba and Ant, and China's richest person.

China's State Administration for Market Regulation (SAMR) is looking into Alibaba's practice of forcing sellers to sign exclusivity contracts, meaning they can't sell their products elsewhere, it said Thursday. This has been criticized by China's retail industry, but a former senior Alibaba executive has called it "standard market practice."

Alibaba shares fell by 8.1% Thursday, their largest one-day slide since mid-November.

Separately, China's central bank and three financial watchdogs said Thursday they would hold a meeting with Ant Group and urge it to implement stricter financial regulations in its banking services.

Ant was set to launch the world's biggest-ever initial public offering in November, but it was suspended in Shanghai and Hong Kong a day after Ma met with Chinese regulators.

The country had introduced a series of new regulations that clamped down on Ant's lending business after Ma made incendiary comments about China's banking rules.

Read more: Here's how Alibaba is growing the global reach of Singles' Day with help from US brands like Allbirds and Fender

In separate statements released Thursday, both Alibaba and Ant Group said they had been notified about the regulatory actions and would cooperate, per the Wall Street Journal.

Alibaba hit headlines Wednesday after Foreign Policy reported that China has demanded its big tech companies process stolen US data for the nation's intelligence agencies upon request.

The company racked up $19.3 billion in core commerce revenue in its fiscal Q2 2021 (ended September 30, 2020), showing it has remained strong during the pandemic. Its Singles Day sales reportedly surpassed $74 billion, nearly double the previous record.

Chinese stock indices fell on Thursday, leaving the Shanghai Composite index down 0.6%, while Hong Kong's Hang Seng, where Alibaba is listed, ended the day up 0.3%.