American retail crazy buy concept shares! Weekly purchases surged to a five-year high

Net buying of More than $400m of American depositary receipts by US retail investors of Chinese companies in the past week was the highest in five years, peaking on Monday, led by e-commerce giant Alibaba The research house's Vanda Rack unit is understood to monitor retail trading activity in 9,000 individual stocks and ETFs in the US.

According to Vanda, U.S. retail buying of Alibaba shares was more than double that of pharmaceutical giant Pfizer over the same period, even though Pfizer received full approval for its coronavirus vaccine from the U.S. Food and Drug Administration on Monday.