China Unciom and China Telecom urge investor caution

China Unciom and China Telecom said would release information in accordance with regulations, adding that investors should pay attention to investment risks.

A representative for China Mobile was not immediately available for comment.

A representative for the NYSE declined to comment beyond the bourse's statement.

"(It) shows how little light there is in that set of regulatory guidance so far, especially around the time the U.S. is changing administrations," said Tariq Dennison, managing director at GFM Asset Management in Hong Kong.

Dennison's funds hold China Mobile shares in both Hong Kong and New York, but he has largely unwound New York positions recently, partly to find U.S. clients investments that are less exposed to Sino-U.S. tensions which will probably persist.

"I don't think Biden will magically de-escalate anything," Dennison said. "He is inheriting a position of tension in U.S.-China relations where he will probably not want his first 100 days to be remembered for instant concessions."