text: Stocks Mixed As Oil Prices Remain Higher NEW YORK - Stocks were narrowly mixed Tuesday as oil prices remained higher and Wall Street weighed a lackluster report on retail sales, but light volume showed that many investors remained on the sidelines.    With Hurricane Ivan threatening oil rigs in the Gulf of Mexico, crude futures moved higher for the second straight day, but the possibility of an increase in output from OPEC took the edge off investors' concerns...