Hong Kong shares of dual-listed Chinese companies plunge as U.S.-delisting fears resurface

Still, UBS Global Wealth Management's Hartmut Issel remains positive on the affected Chinese stocks, though he admits it's "not for the faint hearted."

The fundamental value of these companies will not be affected, Issel, head of Asia-Pacific equities and credit at the firm, told CNBC's "Street Signs Asia" on Friday: "Virtually all of them, the big ones anyway, these ADRs … their business is exclusively in China." "Virtually now all of them have also Hong Kong listing," Issel added. "As an investor you just have to move over if there is an actual delisting [in the U.S.]."

Furthermore, he said: "We do know that the Chinese and also U.S. authorities are in contact, they could salvage it."

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