Alibaba's (NYSE: BABA) stock has declined roughly 15% since the start of November due to several major concerns.
First, Chinese regulators suspended the IPO of its fintech affiliate Ant Group on Nov. 3 after Jack Ma criticized China's state-backed banking system at a government forum. The suspension will hurt both Alibaba, which owns a 33% stake in Ant, and its co-founder Ma, who owns 8.8%.
Shortly afterwards, Chinese regulators drafted new antitrust rules that would prevent the country's tech giants from using "monopolistic" tactics like price discrimination, the preferential treatment for online merchants who sign exclusive agreements, and the mandatory collection of user data. Those rules could shrink Alibaba's moat against its smaller rivals.
Source Fool.com