US Stocks Seen Down Ahead of Busy Day for Data By: CNBC.com News May 16, 2013 at 05:08 AM EDT U.S. stock index futures signaled a lower open on Thursday, as shares in Asia and Europe traded mixed on disappointing sovereign data. Read More >> Related Stocks: Applied Materials Autodesk J C Penney Company Inc Kohl's Corp Nordstrom Wal-Mart Stores, Inc.