Cyber Monday sales could reach $1.5 billion By: MarketWatch November 26, 2012 at 03:51 AM EST ComScore says spending on Cyber Monday, the most important shopping day of the year for online retailers, could reach $1.5 billion or higher. Read More >> Related Stocks: Amazon.com Apple Best Buy Comscore Inc Target Corp Wal-Mart Stores, Inc. eBay