Federal officials said the divestment would “permanently stop” Google’s control over the search engine monopoly.

Shares of mighty Alphabet are down over 6% today after the U.S. Department of Justice said it should be forced to sell Chrome among other remedies after losing a landmark antitrust case in August.

Shares of Alphabet Inc. dropped 5.4% in morning trading, enough to pace the S&P 500 index’s decliners, after the U.S. Department of Justice filed a document proposing a breakup of technology giant’s Google search business.