They also point to increased risk for investors because Chinese companies do not have to comply with strict U.S. financial disclosure rules.

U.S. Labor Secretary Eugene Scalia sent a letter to frtib Chairman Michael Kennedy on Monday, asking him to stop implementing actions to adjust investment plans, according to a copy of a letter seen by Reuters.

The investment plan adjustment "will put millions of federal employees, retirees and active servicemen in an untenable position to either give up any investment in global stock markets or invest billions of dollars in retirement savings in high-risk companies that pose a threat to the national security of the United States," Scalia wrote, adding that "under President trump's direction, the frtib should That is to stop all actions related to the adjustment of the investment plan. "

Frtib spokesman Kim Weaver acknowledged receiving the letter but did not comment further.