US stocks open narrowly mixed as Wall Street awaits Yellen testimony By: CNBC.com News February 24, 2015 at 09:30 AM EST U.S. stocks opened little changed ahead of the first of Fed Chair Janet Yellen's two-day congressional testimonies. Read More >> Related Stocks: Autodesk Boston Beer Company Campbell Soup Comcast Corp Dollar Tree First Solar Herbalife Ltd Hewlett-Packard Home Depot L Brands La Quinta Holdings Inc. Common Stock Lendingclub Corp Macy's Newfield Exploration Papa John's Intl Ross Stores Sentinelone Inc Cl A Sodastream Int Ltd Splunk Inc Toll Brothers Inc Transocean Ltd Verizon Communications Willis Towers Watson Public Ltd