Shares of Walgreen Boots Alliance and Rite Aid tumbled on Friday, after the merger of the two drugstore companies faced reported resistance from U.S. antitrust regulators.
Walgreens shares ended the session down by about 2 percent and Rite Aid shares plunged by more than 13 percent.
Walgreens said in September it would divest between 500 and 1,000 stores to help get cleared by the Federal Trade Commission for a $9.4 billion deal to acquire Rite Aid, according to Reuters. However, reports say the antitrust regulators will not accept this concession.
