https://www.cnbc.com/2018/06/25/chip-stocks-fall-after-trumps-reported-plan-to-restrict-tech-investme.html

Several of the market’s favorite semiconductor names are tanking on Monday as investors grow concerned over President Donald Trump’s plan to restrict foreign investments in U.S. technology companies.

On Sunday the Wall Street Journal said the Treasury Department is drawing up rules to block companies with at least 25 percent Chinese ownership from buying companies involved in "industrially significant technology."