US authorities are conducting a national security review of Shein Global Holdings’ purchase of American clothing retailer Everlane after Shein sought approval for the deal, people familiar with the matter said, adding to a growing list of regulatory hurdles for the China-founded fast-fashion giant in one of its most important markets.The review by the Committee on Foreign Investment in the US (Cfius), an inter-agency panel led by the Treasury Department, began after the US$80 million...