Alibaba stock dropped 1.90% on August 22 after a 1.11% fall on August 21. The decline came after its competitor Pinduoduo reported strong earnings results.

source https://finance.yahoo.com/m/f4cddce2-dc01-32e3-a812-8d85bbca2ce0/why-alibaba-stock-fell-after.html?.tsrc=rss