Reuters reports that the Trump administration on Monday strengthened an executive order barring U.S. investors from buying securities of alleged Chinese military-controlled companies, following disagreement among U.S. agencies about how tough to make the directive.

The Treasury Department published guidance clarifying that the executive order, released in November, would apply to investors in exchange-traded funds and index funds as well as subsidiaries of Chinese companies designated as owned or controlled by the Chinese military.

Secretary of State Mike Pompeo said Monday that the announcement "ensures U.S. capital does not contribute to the development and modernization of the People's Republic of China's (PRC) military, intelligence, and security services."