CHICAGO—Black Friday and Thanksgiving online sales in the United States surged to record highs as shoppers bagged deep discounts and bought more on their mobile devices, heralding a promising start to the key holiday season, according to retail analytics firms.
U.S. retailers raked in a record $7.9 billion in online sales on Black Friday and Thanksgiving, up 17.9 percent from a year ago, according to Adobe Analytics, which measures transactions at the largest 100 U.S. web retailers, on Saturday.
