Stocks Trade Mixed Amid Debt Gridlock Fears By: CNBC.com News July 26, 2011 at 12:03 PM EDT Stocks wavered Tuesday as investors continued to monitor the ongoing debt talks in Washington and after a handful of mixed economic news weighed on sentiment. Read More >> Related Stocks: 3M Co AK Steel Holding Corp Amazon.com BP Plc ADR Baidu.com SP ADR Boeing Co Broadcom Corp Electronic Arts Ford Motor Hewlett-Packard United Parcel Service United States Steel Corp Verizon Communications