Traders on the NYSE Feb. 28, 2022.

Select Chinese stocks have declined sharply on Thursday.

China watchers believe this is likely because the Securities and Exchange Commission has identified five U.S.-listed American depositary receipts of Chinese companies (Yum China, BeiGene, Zai Lab, ACM Research and HUTCHMED) for failing to adhere to the Holding Foreign Companies Accountable Act (HFCAA).