U.S. Stock Futures Drop as Spanish Yields Rise; Wal-Mart Slumps

AP Exclusive: Lost JFK assassination tapes on sale 11.15.11 Nov. 15 (Bloomberg) -- US stock futures fell, indicating the Standard & Poor's 500 Index will drop a second day, as an increase in Spanish yields and higher costs of insuring French bonds ... U.S. Stock Futures Drop as Spanish Yields Rise; Wal-Mart Slumps