(Adds data on Cyber Monday sales, background on Thanksgiving weekend, winners and losers, updates shares)
Nov 27 (Reuters) - Cyber Monday was on track to become the biggest-ever internet shopping day in the United States as shoppers snapped up bargains on toys and electronics, with many more Americans shopping on their phones.
Adobe Analytics, a leading collector of e-commerce data, said Cyber Monday is expected to generate $6.6 billion in sales, up from $5.6 billion a year ago. As of 10 a.m. EST, sales were up 16.9 percent to $840 million. Revenue from smartphones jumped 41 percent over last year, Adobe said.
Thanksgiving and Black Friday, when shoppers spent $7.9 billion and bought more on their mobile devices than last year, had also generated record online sales. That brightened the overall outlook for traditional retailers that have expanded beyond brick-and-mortar outlets into e-commerce.
However, the availability of deals and promotions throughout November hurt shopper traffic at stores.
Promotions during the weekend were largely uninspiring, Barclays analysts said in a note, adding that deeper discounts could continue into December rather than being concentrated on Cyber Monday.
Adobe collects the data by measuring 80 percent of all online transactions from the top 100 U.S. retailers. Of every $10 spent at the top 500 U.S. retailers, $7.50 goes through the Adobe sales platform.
Toys are expected to see the biggest discounts Monday followed by some deals on computers and televisions, Adobe said.
Wal-Mart Stores Inc started Cyber Monday deals at midnight on Monday and said it will bring back discounts from Black Friday that were popular with shoppers.
Wal-Mart is within striking distance of matching Amazon.com Inc's online prices for the first time, a key milestone in its effort to regain the "low price leader" title, data gathered for Reuters show. Shares of retailers were off earlier highs in Monday's trading.
Amazon.com shares were up 0.8 percent, but Wal-Mart dipped 0.2 percent and Macy's shares were down 1.3 percent. J.C. Penney , Target and Kohl's were also lower. (Reporting by Nandita Bose in New York and Sruthi Ramakrishnan in Bengaluru; Editing by Bernard Orr and Nick Zieminski)