Watch out Amazon! Wal-Mart is coming: Retail pro By: CNBC.com News May 14, 2014 at 08:29 AM EDT Wal-Mart is fast becoming a "fierce threat" to Amazon's dominance of online shopping, a leading retail analyst tells CNBC. Read More >> Related Stocks: Amazon.com Macy's Nordstrom Wal-Mart Stores, Inc.