US STOCKS-S&P, Dow falter after six days of gains as Walmart weighs By: Reuters: Company News February 20, 2018 at 10:12 AM EST * Indexes down: Dow 0.32 pct, S&P 0.17 pct, Nasdaq 0.01 pct (Updates to open) Read More >> Related Stocks: Amazon.com Costco Wholesale Home Depot JPMorgan Chase & Co Nxp Semiconductors Qualcomm, Inc. Rite Aid Corp Snap Inc Target Corp Wal-Mart Stores, Inc. Walgreens Boots Alliance Wells Fargo